CN116035806A - A kind of medical protective headgear and its preparation method and use method - Google Patents

Abstract

The invention relates to a semi-spherical shell and a buffer lining, wherein the shell is in a semi-spherical shape; the shape of the buffer lining is the same as that of the shell, and the buffer lining is arranged on one side, which is contacted with the head, below the medical protective hood; the shell is connected with the buffer lining through bonding; the thickness of the shell is 0.5-5mm, preferably 1-3mm. The shell hardness of the medical protective hood can change along with time and temperature, and the medical protective hood has excellent plasticity, tearing resistance, waterproofness and dimensional stability, has aromatic smell, and improves user experience.

Description

A kind of medical protective headgear and its preparation method and use method

technical field

The invention relates to the field of medical rehabilitation nursing equipment, and more particularly to a medical protective headgear and its preparation method and use method.

Background technique

After a head injury or craniotomy, the wound is usually covered with a sterile dressing, then secured with medical tape, and then wrapped tightly with an elastic bandage, leaving no wound or surgical site protected. In the later recovery process, the head may be bumped or hit by external force, and there is a risk of secondary injury. Although the commonly used helmet can prevent the wound from being bumped or impacted by external force, the helmet itself has a certain weight and is easy to squeeze the wound.

Most of the medical protective headgears in the prior art are made of soft texture and cloth materials, which are basically used to isolate or protect viruses, and have basically no effect on the protection of wounds. Rigid medical protective headgear for surgical site protection.

Contents of the invention

In view of the problems of the existing medical protective hoods in the above-mentioned prior art, one of the objectives of the present invention is to provide a medical protective hood, the hardness of the shell part of the medical protective hood can change with time and temperature, and has Excellent plasticity, it can be shaped according to the shape of the patient's head and the distribution of the wound; it is light in weight, has good mechanical strength and dimensional stability, and can effectively protect the injured part of the head or the surgical site; at the same time, it has an aromatic smell and can improve user experience. The medical protective headgear provided by the invention is especially suitable for rehabilitation care after head injury or craniotomy.

In order to achieve the above object, the technical scheme that the present invention takes is as follows:

A medical protective headgear, comprising a housing and a buffer lining, the housing is hemispherical; the shape of the buffering inner lining is the same as that of the housing, and is used for medical protection when the medical protective headgear is used. The lower side of the hood is in contact with the head; the shell and the buffer lining are connected by bonding; the thickness of the shell is 0.5-5mm, preferably 1-3mm.

In the above technical solution, the medical protective headgear shell has and/or does not have a hole structure, preferably has a hole structure; the buffer lining has and/or does not have a hole structure, preferably has a hole structure. The hole structure is distributed throughout the housing and/or the buffer inner liner, and the interval between the holes is 1-10mm, preferably 2-4mm; the hole diameter of the hole structure is 0.5-5mm, preferably 1-3mm. When both the housing and the cushioning inner liner have a hole structure, preferably the hole structures of the two are correspondingly connected, so as to make the medical protective headgear have good air permeability.

The material of the buffer lining is selected from at least one of rubber, silica gel, sponge, thermoplastic elastomer, cloth, paper, gel, leather and plasticine, and the thickness of the buffer lining is 1-15mm, preferably 3-10mm .

Further, the shape of the cushioning lining is the same as the shape of the shell means that the expanded shape of the cushioning liner is the same or similar to the expanded shape inside the shell, as long as it is attached to the inside of the shell and the head is connected to the inside of the shell. The separation can act as a buffer. The shape of the cushioning lining material is not limited, and it is preferably a rectangle, square, or circular sheet that is larger than the head, and it is cut according to the shape of the medical protective headgear shell during use. The buffer lining material can be a material with holes, or a material without holes, which are perforated together with the medical protective headgear shell when used.

In the above technical solution, the medical protective headgear shell is made of copolyester material, and the copolyester material includes copolyester X and copolyester Y; wherein the copolyester X contains fat Patriotic diacid and/or its derivative chain segment, aromatic diacid and/or its derivative chain segment and diol chain segment; The diol chain segment includes at least one diol with a ring structure chain segment segment and at least one aliphatic diol segment; wherein the aromatic diacid and/or its derivative segment accounts for 15 to 60% of the molar percentage of the total diacid and/or its derivative segment;

Wherein said copolyester Y comprises aliphatic diacid and/or its derivative segment, aromatic diacid and/or its derivative segment and at least one aliphatic diol segment; wherein aromatic diacid and The molar percentage of/or its derivative segments in the total diacid and/or its derivative segments is 50-95%. The content of the aromatic diacids in the copolyesters X and Y of the present invention in the total diacids is within the above range, which can improve the rigidity of the copolyesters to varying degrees.

In the above technical solution, based on the total weight of the copolyester as 100 parts, the copolyester X is 50 to 99 parts, preferably 55 to 80 parts; the content of the copolyester X of the present invention is within the above range, which can be different Reduce the temperature required for the material to trigger softening, increase the hardness and wear resistance of the material;

The copolyester Y is 1 to 50 parts, preferably 20 to 45 parts. The content of the copolyester Y in the present invention is within the above range, which can reduce the time required for curing the copolyester composition material to varying degrees.

In the above technical scheme, the molar percentage of the aromatic diacid and/or its derivative segment in the copolyester X to the total diacid and/or its derivative segment is 25-60%, more preferably 30% -60%.

Preferably, the mole percentage of diol chain segments with ring structure in the copolyester X is 1-60%, preferably 5-25%. The introduction of diols with a ring structure can increase the rigidity of the copolyester, reduce the temperature required for the material to trigger softening, and increase the hardness and wear resistance of the material.

Preferably, the molar ratio of the total diacid segments to the total diol segments in the copolyester X is (0.8-1):1, preferably (0.9-1):1.

Preferably, the molar percentage of aromatic diacids and/or derivatives thereof in the copolyester Y to the total diacids and/or derivatives thereof is 60-85%.

Preferably, the molar ratio of the total diacid segments to the total diol segments in the copolyester Y is (0.8-1):1, preferably (0.9-1):1.

In the above technical scheme, the copolyester X and the copolyester Y are each independently at least one of random copolymers, alternating copolymers, block copolymers and graft copolymers, preferably random copolymers and/or block copolymers.

In the above technical solution, the molecular weight range of the copolyester X and copolyester Y is 20,000-200,000, preferably 80,000-150,000.

In the above technical solution, the aliphatic diacid and/or its derivatives are selected from at least one of 1,4-succinic acid and/or its derivatives, 1,6-adipic acid and/or its derivatives kind.

The aromatic diacid and/or its derivatives are selected from terephthalic acid and/or its derivatives.

The diol with a ring structure is selected from at least one of 1,4-cyclohexanedimethanol, isosorbide, 2,2,4,4-tetramethyl 1,3-cyclobutanediol .

The aliphatic diol is selected from at least one of 1,3-propanediol/1,4-butanediol or 1,6-hexanediol.

Wherein, the introduction of the diol with a ring structure in the separate copolyester X can reduce the thickness of the copolyester lamellae, thereby reducing the melting point of the copolyester and increasing the convenience of its use. On the other hand, the introduction of diols with a ring structure can reduce the crystallization rate of the copolyester, resulting in an increase in the solidification time of the copolyester material.

The copolyester Y alone has a shorter curing time than copolyester X alone, but the softening temperature is higher, and the hardness and wear resistance are worse. Therefore, the composition of copolyester X and copolyester Y is used to make up for the deficiency of copolyester X or Y alone, and by adjusting the ratio of the two, the suitable softening temperature, hardness, wear resistance and curing of the copolyester of the composition can be obtained. time.

In the above technical scheme, the aliphatic diol segment in the copolyester X is different from the aliphatic diol segment in the copolyester Y; preferably,

The aliphatic diol segment in the copolyester X comes from 1,4-butanediol; the aliphatic diol segment in the copolyester Y comes from 1,3-propanediol and/or 1,6- Hexylene glycol.

In the above technical solution, based on the total weight of copolyester X and copolyester Y as 100 parts, it also contains 0.5-10 parts, preferably 1.5-8 parts, of essence.

The fragrance is selected from at least one of fruit essence and floral essence; the fruit essence includes but not limited to strawberry, banana, sweet orange, pineapple, grape and other fragrance types; the floral essence includes but not limited to rose, jasmine , tuberose, lily of the valley, magnolia and other fragrance types.

In the above-mentioned technical scheme, based on the total weight of copolyester X and copolyester Y as 100 parts, it also contains 1-15 parts of lubricant, and the lubricant is selected from stearic acid, butyl stearate, oil At least one of amide, ethylene bisstearamide and low density polyethylene.

The preparation method of the copolyester material of the present invention comprises the step of melt blending after mixing the components including the copolyester X and the copolyester Y.

In the above technical solution, the mixing is carried out under stirring conditions, and the stirring rate is 20-150r/min.

In the above technical solution, the stirring time is 5-15min.

In the above technical solution, the melt blending is carried out by extruding and granulating through a twin-screw extruder; preferably, the extrusion and granulating temperature is 110-260°C, more preferably 160-220°C.

The second object of the present invention is to provide the preparation method of the medical protective headgear, which has low production cost, convenient use and good user experience.

In order to achieve the above object, the technical scheme that the present invention takes is as follows:

A method for preparing a medical protective headgear, comprising sequentially extruding, molding and/or cutting a copolyester material to obtain a shell profile of the medical protective headgear, and the extrusion is preferably melt extrusion.

The extrusion temperature is 90-230°C, preferably 110-170°C;

The molding method is injection molding and/or compression molding. Said equipment also adopts extrusion, injection molding and compression molding equipment commonly used in the prior art.

The third object of the present invention is to provide a method for using the medical protective headgear, which includes heating the shell of the medical protective headgear to make it fully softened, and then rapidly reducing it to a temperature acceptable to the human body, according to the shape of the patient's head and the distribution of the wound. Shaping; After the shaping is completed, wait for it to harden, and then fix the buffer lining on the side of the shell that is in contact with the head with double-sided tape.

Preferably, the above-mentioned medical protective headgear shell profile is heated to fully soften it. The heating method includes but is not limited to soaking in hot water, especially boiling water, heating in a microwave oven, oven, hot plate, etc.; and then quickly lowering it to a temperature acceptable to the human body , cooling methods include but are not limited to immersion in cold water, ice water or liquid nitrogen, contact with ice cubes or ice packs, placing in a refrigerator or freezer or freezer; then wipe it clean, according to the shape of the patient's head and the distribution of the wound Carry out shaping. When shaping, there is a gap between the shell and the head for subsequent placement of the cushioning liner. The size of the gap at and near the wound on the head is more than twice the thickness of the cushioning liner to prevent the shell from When the wound is touched, the size of the gap in the rest of the position is equivalent to the thickness of the buffer lining, which can support the head to the shell; after the shaping is completed, wait for it to harden to obtain the shell. Then fix the cushioning liner on the side of the housing in contact with the head with double-sided tape, preferably, cut off the part of the cushioning lining not covered by the housing. Finally, use medical tape to fix a bandage on both sides of the shell near the ear along the face and chin to fix the hood.

Beneficial effects of the present invention: the medical protective headgear of the present invention protects head injuries or surgical sites to avoid secondary injuries; it has an aromatic smell and provides better user experience.

Description of drawings

Fig. 1 is a structural schematic diagram of the medical protective headgear of the present invention.

Reference signs: 1. shell; 2. buffer lining; 3. bandage. The medical protective hood shown in the figure includes a shell and a buffer lining. The shell is hemispherical; the shape of the buffer lining is the same as that of the shell, and it is placed under the medical protective hood on the side where the head contacts .

Detailed ways

The present invention is specifically described below in conjunction with specific embodiment, it is necessary to point out here that following embodiment is only used for the further description of the present invention, can not be interpreted as the restriction to protection scope of the present invention, those skilled in the art can understand the present invention according to the content of the present invention Some non-essential improvements and adjustments made by the invention still belong to the protection scope of the present invention.

In addition, it should be noted that the various specific technical features described in the following specific embodiments may be combined in any suitable manner if there is no contradiction. In order to avoid unnecessary repetition, various possible combinations are not further described in the present invention.

In addition, various combinations of different implementations of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the present invention, the technical solutions formed thereby belong to a part of the original disclosure content of this specification, and also fall into the scope of the present invention. scope of protection.

Reagent sources: All reagents used in the present invention are commercially available.

In the following examples and comparative examples, the weight-average molecular weight of the polymer adopts gel permeation chromatography (GPC), using tetrahydrofuran (THF) as solvent, in Waters-208 (band Waters 2410RI detector, 1.5mL/min flow rate, 30°C) measured on the instrument, calibrated with styrene standard.

The composition of the polyester composition is determined by the feeding of raw materials; unless otherwise specified, the type of reaction raw materials can be adjusted accordingly according to the composition and molecular weight of the target product, and the molecular weight of the product can be controlled respectively by adjusting the feeding amount and feeding ratio And the content of each repeating unit in the product.

Example 1

The medical protective hood includes a shell and a cushioning liner, the shell is hemispherical; the shape of the cushioning liner is the same as that of the shell, and it is placed under the medical protective hood on the side in contact with the head; the The casing and the buffer lining are connected by double-sided adhesive; the thickness of the casing is 2mm. The medical protective headgear shell has a hole structure; the hole structure is distributed through the front splint and the rear splint, the interval between the holes is 2mm, and the hole diameter is 2mm. The material of the cushioning lining is sponge, and the thickness of the cushioning lining is 5-10mm.

Under the condition of stirring (the speed of stirring is 30rpm, and the time is 10min), 7kg of terephthalic acid-butanediol-succinic acid-1,4-cyclohexanedimethanol copolyester X (weight average molecular weight is 120,000, of which, based on the total moles of terephthalic acid and succinic acid repeating units, the content of terephthalic acid repeating units is 60 mole %; the content of butanediol and 1,4-cyclohexanedimethanol repeating units The total number of moles of 1,4-cyclohexanedimethanol repeating unit is 25 mole %) particles, 2.5kg terephthalic acid-propylene glycol-succinic acid copolyester Y (weight average molecular weight is 100,000, Wherein, based on the total molar number of terephthalic acid and succinic acid repeating units, the content of terephthalic acid repeating units is 60 mol%) particles, 0.2kg jasmine essence and 0.3kg low-density polyethylene are mixed. Wherein, the molar ratio of the total diacid segment and the total diol segment in the copolyester X is 0.95:1, and the molar ratio of the total diacid segment and the total diol segment in the copolyester Y is 0.95:1. The obtained mixture is extruded and granulated through a twin-screw extruder, the screw speed is controlled at 10rpm, the torque is 20N*m, and the temperature of each section from the feed port to the extrusion port in the twin-screw extruder is 150°C in sequence , 160°C, 170°C, 170°C, 170°C, 170°C to prepare copolyester material A1. The copolyester material A1 was melted and pressed at 170°C and 1000 MPa into a 2mm thick plate, and cut into a suitable shape to obtain the plate P1. When in use, heat the plate P1 with boiling water to soften it, then quickly cool it to 37°C in ice water, take it out and dry it, shape it according to the shape of the patient's head and the distribution of the wound, and wait for it to harden to obtain the medical protective headgear shell B1. Fix the cushioning lining on the inside of the housing B1, and fix a bandage of appropriate length on both sides of the housing near the ears with medical tape to obtain the medical protective headgear Q1.

Example 2

The medical protective hood includes a shell and a cushioning liner, the shell is hemispherical; the shape of the cushioning liner is the same as that of the shell, and it is placed under the medical protective hood on the side in contact with the head; the The casing and the buffer lining are connected by double-sided adhesive; the thickness of the casing is 2mm. The medical protective headgear shell has a hole structure; the hole structure is distributed through the front splint and the rear splint, the interval between the holes is 2mm, and the hole diameter is 2mm. The material of the cushioning lining is sponge, and the thickness of the cushioning lining is 5-10mm.

Under the condition of stirring (the speed of stirring is 30rpm, and the time is 10min), 6.5kg of terephthalic acid-butylene glycol-adipic acid-isosorbide copolyester X (weight-average molecular weight is 130,000, wherein, expressed as Based on the total moles of terephthalic acid and adipic acid repeating units, the content of terephthalic acid repeating units is 55% by mole; based on the total moles of butanediol and isosorbide repeating units, the isosorbide repeating units The content is 20 mole %) particles, 3kg of terephthalic acid-hexanediol-succinic acid copolyester Y (weight average molecular weight is 100,000, wherein, the total moles of terephthalic acid and succinic acid repeating units As a benchmark, the content of the terephthalic acid repeating unit is 60 mol%) particles, 0.2 kg of jasmine essence and 0.3 kg of low-density polyethylene were mixed. Wherein, the molar ratio of the total diacid segments and the total diol segments in the copolyester X is 1:1, and the molar ratio of the total diacid segments and the total diol segments in the copolyester Y is 1:1. The obtained mixture is extruded and granulated through a twin-screw extruder, the screw speed is controlled at 10rpm, the torque is 20N*m, and the temperature of each section from the feed port to the extrusion port in the twin-screw extruder is 150°C in sequence , 160°C, 170°C, 170°C, 170°C, 170°C to prepare copolyester material A2. The copolyester material A2 was melted and pressed into a 2mm thick plate at 170°C and 1000 MPa, and cut into a suitable shape to obtain the plate P2. When in use, heat and soften the plate P2 with boiling water, then quickly cool it to 37°C in ice water, take it out and dry it, shape it according to the shape of the patient's head and the distribution of the wound, and wait for it to harden to obtain the medical protective headgear shell B2. Fix the cushioning lining on the inside of the housing B2, and fix a bandage of appropriate length on both sides of the housing near the ears with medical tape to obtain the medical protective headgear Q2.

Example 3

The medical protective hood includes a shell and a cushioning liner, the shell is hemispherical; the shape of the cushioning liner is the same as that of the shell, and it is placed under the medical protective hood on the side in contact with the head; the The casing and the buffer lining are connected by double-sided adhesive; the thickness of the casing is 2mm. The medical protective headgear shell has a hole structure; the hole structure is distributed through the front splint and the rear splint, the interval between the holes is 2mm, and the hole diameter is 2mm. The material of the cushioning lining is sponge, and the thickness of the cushioning lining is 5-10mm.

Under stirring conditions (stirring rate is 30rpm, time is 10min), 6.5kg terephthalic acid-butanediol-succinic acid-2,2,4,4-tetramethyl 1,3-cyclobutane Diol copolyester X (weight-average molecular weight is 150,000, wherein, based on the total moles of terephthalic acid and succinic acid repeating units, the content of terephthalic acid repeating units is 30 mole %; based on butanediol and succinic acid repeating units Based on the total moles of 2,2,4,4-tetramethyl 1,3-cyclobutanediol repeating units, the 2,2,4,4-tetramethyl 1,3-cyclobutanediol repeating Content is 20 mole %) particle, 3kg terephthalic acid-hexanediol-succinic acid copolyester Y (weight-average molecular weight is 100,000, wherein, the total molar number of repeating units of terephthalic acid and succinic acid is As a basis, the content of the repeating unit of terephthalic acid is 60 mol%) particles, 0.2 kg of jasmine essence and 0.3 kg of low-density polyethylene were mixed. Wherein, the molar ratio of the total diacid segment and the total diol segment in the copolyester X is 0.9:1, and the molar ratio of the total diacid segment and the total diol segment in the copolyester Y is 0.9:1. The obtained mixture is extruded and granulated through a twin-screw extruder, the screw speed is controlled at 10rpm, the torque is 20N*m, and the temperature of each section from the feed port to the extrusion port in the twin-screw extruder is 150°C in sequence , 160°C, 170°C, 170°C, 170°C, 170°C to prepare copolyester material A3. The copolyester material A3 was melted and pressed into a 2mm thick plate at 170°C and 1000 MPa, and cut into a suitable shape to obtain the plate P3. When in use, heat and soften the plate P3 with boiling water, then quickly cool it to 37°C in ice water, take it out and dry it, shape it according to the shape of the patient's head and the distribution of the wound, and wait for it to harden to obtain the medical protective headgear shell B3. Fix the buffer lining inside the housing B3, and use medical tape to fix a bandage of appropriate length on both sides of the housing near the ears to obtain the medical protective headgear Q3.

Example 4

The medical protective hood includes a shell and a cushioning liner, the shell is hemispherical; the shape of the cushioning liner is the same as that of the shell, and it is placed under the medical protective hood on the side in contact with the head; the The casing and the buffer lining are connected by double-sided adhesive; the thickness of the casing is 2mm. The medical protective headgear shell has a hole structure; the hole structure is distributed through the front splint and the rear splint, the interval between the holes is 2mm, and the hole diameter is 2mm. The material of the cushioning lining is sponge, and the thickness of the cushioning lining is 5-10 mm.

Under the condition of stirring (the speed of stirring is 30rpm, the time is 10min), 7kg terephthalic acid-butanediol-succinic acid-1,4-cyclohexanedimethanol copolyester X (weight average molecular weight is 120,000, of which, based on the total moles of terephthalic acid and succinic acid repeating units, the content of terephthalic acid repeating units is 60 mole %; the content of butanediol and 1,4-cyclohexanedimethanol repeating units The total number of moles of 1,4-cyclohexanedimethanol repeating unit is 25 mole %) particles, 2.5kg terephthalic acid-propylene glycol-succinic acid copolyester Y (weight average molecular weight is 110,000, Wherein, based on the total moles of terephthalic acid and succinic acid repeating units, the content of terephthalic acid repeating units is 80 mol%) particles, 0.2kg jasmine essence and 0.3kg low-density polyethylene are mixed. Wherein, the molar ratio of the total diacid segment and the total diol segment in the copolyester X is 0.95:1, and the molar ratio of the total diacid segment and the total diol segment in the copolyester Y is 1:1. The obtained mixture is extruded and granulated through a twin-screw extruder, the screw speed is controlled at 10rpm, the torque is 20N*m, and the temperature of each section from the feed port to the extrusion port in the twin-screw extruder is 150°C in sequence , 160°C, 170°C, 170°C, 170°C, 170°C to prepare copolyester material A4. The copolyester material A4 was melted and pressed into a 2mm thick plate at 170°C and 1000 MPa, and cut into a suitable shape to obtain the plate P4. When in use, heat and soften the plate P4 with boiling water, then quickly cool it to 37°C in ice water, take it out and dry it, shape it according to the shape of the patient's head and the distribution of the wound, and wait for it to harden to obtain the medical protective headgear shell B4. Fix the cushioning lining on the inner side of the housing B4, and fix a bandage of appropriate length on both sides of the housing near the ears with medical tape to obtain the medical protective headgear Q4.

Example 5

The medical protective hood includes a shell and a cushioning liner, the shell is hemispherical; the shape of the cushioning liner is the same as that of the shell, and it is placed under the medical protective hood on the side in contact with the head; the The casing and the buffer lining are connected by double-sided adhesive; the thickness of the casing is 2mm. The medical protective headgear shell has a hole structure; the hole structure is distributed through the front splint and the rear splint, the interval between the holes is 2mm, and the hole diameter is 2mm. The material of the cushioning lining is sponge, and the thickness of the cushioning lining is 5-10 mm.

Under stirring conditions (stirring rate is 30rpm, time is 10min), 7kg terephthalic acid-butanediol-succinic acid-2,2,4,4-tetramethyl 1,3-cyclobutanedi Alcohol copolyester X (the weight-average molecular weight is 150,000, wherein, based on the total moles of terephthalic acid and succinic acid repeating units, the content of terephthalic acid repeating units is 60 mole %; based on butanediol and 2 ,2,4,4-Tetramethyl 1,3-cyclobutanediol repeating units based on the total number of moles, the content of 2,2,4,4-tetramethyl 1,3-cyclobutanediol repeating units 10 mole %) particles, 2.5 kg of terephthalic acid-propylene glycol-succinic acid copolyester Y (weight average molecular weight is 100,000, wherein, based on the total molar number of terephthalic acid and succinic acid repeating units, The content of the repeating unit of terephthalic acid is 60 mol%) particles, 0.2kg of jasmine essence and 0.3kg of low-density polyethylene are mixed. Wherein, the molar ratio of the total diacid segments and the total diol segments in the copolyester X is 1:1, and the molar ratio of the total diacid segments and the total diol segments in the copolyester Y is 0.9:1. The obtained mixture is extruded and granulated through a twin-screw extruder, the screw speed is controlled at 10rpm, the torque is 20N*m, and the temperature of each section from the feed port to the extrusion port in the twin-screw extruder is 150°C in sequence , 160°C, 170°C, 170°C, 170°C, 170°C to prepare copolyester material A5. The copolyester material A5 was melted and pressed at 170° C. and 1000 MPa into a 2 mm thick plate, and cut into a suitable shape to obtain the plate P5. When in use, heat and soften the plate P5 with boiling water, then quickly cool it to 37°C in ice water, take it out and dry it, shape it according to the shape of the patient's head and the distribution of the wound, and wait for it to harden to obtain the medical protective headgear shell B5. Fix the cushioning lining on the inside of the housing B5, and fix a bandage of appropriate length on both sides of the housing near the ears with medical tape to obtain the medical protective headgear Q5.

Example 6

The medical protective hood includes a shell and a cushioning liner, the shell is hemispherical; the shape of the cushioning liner is the same as that of the shell, and it is placed under the medical protective hood on the side in contact with the head; the The casing and the buffer lining are connected by double-sided adhesive; the thickness of the casing is 2mm. The medical protective headgear shell has a hole structure; the hole structure is distributed through the front splint and the rear splint, the interval between the holes is 2mm, and the hole diameter is 2mm. The material of the cushioning lining is sponge, and the thickness of the cushioning lining is 5-10 mm.

Under the condition of stirring (the speed of stirring is 30rpm, and the time is 10min), 7kg of terephthalic acid-butanediol-succinic acid-isosorbide copolyester X (weight-average molecular weight is 130,000, wherein, with p Based on the total moles of phthalic acid and succinic acid repeating units, the content of terephthalic acid repeating units is 60 mole %; based on the total moles of butanediol and isosorbide repeating units, isosorbide repeating units The content is 5 mole %) particles, 2.5kg terephthalic acid-propylene glycol-succinic acid copolyester Y (weight average molecular weight is 100,000, wherein, the total molar number of terephthalic acid and succinic acid repeating units is As a basis, the content of the repeating unit of terephthalic acid is 60 mol%) particles, 0.2 kg of jasmine essence and 0.3 kg of low-density polyethylene were mixed. Wherein, the molar ratio of the total diacid segment and the total diol segment in the copolyester X is 0.95:1, and the molar ratio of the total diacid segment and the total diol segment in the copolyester Y is 0.9:1. The obtained mixture is extruded and granulated through a twin-screw extruder, the screw speed is controlled at 10rpm, the torque is 20N*m, and the temperature of each section from the feed port to the extrusion port in the twin-screw extruder is 150°C in sequence , 160°C, 170°C, 170°C, 170°C, 170°C to prepare copolyester material A6. The copolyester material A6 was melted and pressed into a 2mm thick plate at 170°C and 1000 MPa, and cut into a suitable shape to obtain the plate P6. When in use, heat and soften the plate P6 with boiling water, then quickly cool it to 37°C in ice water, take it out and dry it, shape it according to the shape of the patient's head and the distribution of the wound, and wait for it to harden to obtain the medical protective headgear shell B6. Fix the buffer lining inside the housing B6, and use medical tape to fix a bandage of suitable length on both sides of the housing near the ears to obtain the medical protective headgear Q6.

Comparative example 1

Under stirring conditions (stirring speed is 30rpm, time is 10min), 9.5kg terephthalic acid-butanediol-succinic acid-1,4-cyclohexanedimethanol copolyester X (weight average molecular weight 120,000, wherein, based on the total number of moles of terephthalic acid and succinic acid repeating units, the content of terephthalic acid repeating units is 60 mole %; repeating with butanediol and 1,4-cyclohexanedimethanol The total molar number of the unit is the basis, and the content of the repeating unit of 1,4-cyclohexanedimethanol is 25 mol%) particles, 0.2kg jasmine essence and 0.3kg low-density polyethylene are mixed. Wherein, the molar ratio of the total diacid segments and the total diol segments in the copolyester X is 1:1. The obtained mixture is extruded and granulated through a twin-screw extruder, the screw speed is controlled at 10rpm, the torque is 20N*m, and the temperature of each section from the feed port to the extrusion port in the twin-screw extruder is 150°C in sequence , 160°C, 170°C, 170°C, 170°C, 170°C to prepare copolyester material A7. The copolyester material A7 was melted and pressed into a 2mm thick plate at 170°C and 1000 MPa, and cut into a suitable shape to obtain the plate P7. When in use, heat and soften the plate P7 with boiling water, then quickly place it in ice water to cool to 37°C, take it out and dry it, shape it according to the shape of the patient's head and the distribution of the wound, and wait for it to harden to obtain the medical protective headgear shell B7.

Comparative example 2

Under the condition of stirring (the speed of stirring is 30rpm, and the time is 10min), 9.5kg of terephthalic acid-butylene glycol-adipic acid-isosorbide copolyester X (weight average molecular weight is 130,000, wherein, expressed as Based on the total moles of terephthalic acid and adipic acid repeating units, the content of terephthalic acid repeating units is 55% by mole; based on the total moles of butanediol and isosorbide repeating units, the isosorbide repeating units The content is 20 mole %) particle, 0.2kg jasmine essence and 0.3kg low-density polyethylene mix. Wherein, the molar ratio of the total diacid segments and the total diol segments in the copolyester X is 0.9:1. The obtained mixture is extruded and granulated through a twin-screw extruder, the screw speed is controlled at 10rpm, the torque is 20N*m, and the temperature of each section from the feed port to the extrusion port in the twin-screw extruder is 150°C in sequence , 160°C, 170°C, 170°C, 170°C, 170°C to prepare copolyester material A8. The copolyester material A8 was melted and pressed into a 2mm thick plate at 170°C and 1000 MPa, and cut into a suitable shape to obtain the plate P8. When in use, heat and soften the plate P8 with boiling water, then quickly cool it to 37°C in ice water, take it out and dry it, shape it according to the shape of the patient's head and the distribution of the wound, and wait for it to harden to obtain the medical protective headgear shell B8.

Comparative example 3

Under the condition of stirring (stirring rate is 30rpm, time is 10min), 6.5kg terephthalic acid-butanediol-succinic acid copolyester Y (weight average molecular weight is 100,000, wherein, with terephthalic acid and the total moles of succinic acid repeating units as a basis, the content of terephthalic acid repeating units is 25 mol%) particles, 3kg terephthalic acid-butylene glycol-adipic acid copolyester (weight average molecular weight is 100,000 , wherein, based on the total moles of terephthalic acid and adipic acid repeating units, the content of terephthalic acid repeating units is 65 mol%) particles, 0.2kg jasmine essence and 0.3kg low-density polyethylene are mixed. Wherein, the molar ratio of the total diacid segments and the total diol segments in the copolyester Y is 0.95:1. The obtained mixture is extruded and granulated through a twin-screw extruder, the screw speed is controlled at 10rpm, the torque is 20N*m, and the temperature of each section from the feed port to the extrusion port in the twin-screw extruder is 150°C in sequence , 160°C, 170°C, 170°C, 170°C, 170°C to prepare copolyester material A9. The copolyester material A9 was melted and pressed into a 2mm thick plate at 170°C and 1000 MPa, and cut into a suitable shape to obtain the plate P9. When in use, heat and soften the plate P9 with boiling water, then quickly cool it to 37°C in ice water, take it out and dry it, shape it according to the shape of the patient's head and the distribution of the wound, and wait for it to harden to obtain the medical protective headgear shell B9.

test case 1

The medical protective hood shells obtained in Examples 1-6 and Comparative Example 3 were placed in hot water at different temperatures to make them soften, and the temperatures required to trigger the softening of the medical protective hood shells were recorded respectively. The results are shown in the table 1.

It can be seen that the temperature required for softening of the medical protective hood shells B1-B6 obtained in Examples 1-6 is lower than that of the medical protective hood shell B9 obtained in Comparative Example 3, and the maximum drop can reach 20°C. Reducing the softening trigger temperature of the medical protective headgear shell can greatly increase the convenience of using the medical protective headgear.

Table 1 The temperature required for the softening of the medical protective headgear shell B1-B9

test case 2

Shore A hardness test

After melting the copolyesters A1-A8 obtained in Examples 1-6 and Comparative Examples 1-2, respectively, they were treated at 170 and 1000 MPa for 5 minutes, and pressed into plates C1-C8 with a thickness of 4 mm and a side length of 7 cm. Take out the hot plate, quench the plate for 1 minute with a cold iron block that has been placed at room temperature for a long time, and record the time zero. The quenched plate was subjected to the test of the Shore A hardness over time (measured with a Drickshore A hand-held hardness tester, and the measurement result after 3 s was taken), and the results are shown in Table 2 below.

Table 2 Shore A hardness test

As can be seen from the results of the above table 2, the hardness of the boards C1-C8 made of the copolyesters A1-A8 obtained in Examples 1-6 and Comparative Examples 1-2 respectively at the beginning of the test (higher temperature) was lower. The hardness increases slowly with time after the treatment is cold. Compared with the board C7-C8 made of the copolyester A7-A8 obtained in Comparative Example 1-2, the board C1-C6 made of the copolyester A1-A6 obtained in Example 1-6 has a faster curing speed, and the Shore A It only takes about 4 minutes for the hardness to reach 50, and about 7 minutes for the latter. The copolyesters A1-A6 obtained in Examples 1-6 have good plasticity and fixability, and the curing time is short, and are suitable for preparing medical protective headgears.

Test case 3

1. Water resistance test

The boards C1-C6 made of Examples 1-6 and the obtained copolyesters A1-A6 were weighed, their dimensions were measured, photographed and their appearances were observed. Soak the plate in 25°C water for 24 hours, then take it out to dry, observe the weighing, measure the size, take pictures and observe the appearance. If there is no change in the appearance of the board after immersion compared to before immersion, record as "no change", otherwise record as "change". If the size of the plate after immersion in water is within ± if compared with before immersion, record as "no change", otherwise record as "change". If the weight of the plate after immersion is compared with that before immersion, the degree of change is within ± if, record as "no change", otherwise record as "change". The results are shown in Table 3.

2. Save time test

The boards C1-C6 made of Examples 1-6 and the obtained copolyesters A1-A6 were weighed, their dimensions were measured, photographed and their appearances were observed. Then, the obtained plate was placed in a room temperature (25°C) normal pressure environment for 2 years, the plate was weighed, its size was measured, photographed and its appearance was observed. If there is no change in the appearance of the board after 2 years of placement compared with before placement, it is recorded as "no change", otherwise it is recorded as "change". If there is no change in the size of the plate after 2 years of placement compared with before placement, it is recorded as "no change", otherwise it is recorded as "change". If the weight of the board after 2 years of storage is within ± the weight of the board before storage, it is recorded as "no change", otherwise it is recorded as "change". The results are shown in Table 3.

Table 3 Water resistance and storage time test

As can be seen from the results of the above table 3, the medical protective headgear provided by the present invention has good water resistance and dimensional stability, so it does not need special packaging such as water-proof during storage and transportation; At least two years.

The present invention has been described in detail above in conjunction with specific implementations and exemplary examples, but these descriptions should not be construed as limiting the present invention. Those skilled in the art understand that without departing from the spirit and scope of the present invention, various equivalent replacements, modifications or improvements can be made to the technical solutions and implementations of the present invention, all of which fall within the scope of the present invention. The protection scope of the present invention shall be determined by the appended claims.

Claims (14)

1. A medical protective hood, comprising a housing and a buffer lining, the housing is hemispherical; the shape of the buffer lining is the same as that of the housing, and is placed under the medical protective hood to contact the head One side; the shell and the buffer lining are connected by bonding; the thickness of the shell is 0.5-5mm, preferably 1-3mm. 2. The medical protective headgear according to claim 1, characterized in that, the medical protective headgear housing and the buffer lining have a hole structure; the hole structure runs through the housing and the buffering inner lining distribution, the interval between the holes is 1-10mm, preferably 2-4mm; the pore diameter of the pore structure is 0.5-5mm, preferably 1-3mm. 3. The medical protective headgear according to claim 1, wherein the buffer lining material is selected from at least one of rubber, silica gel, sponge, thermoplastic elastomer, cloth, paper, gel, leather and plasticine. species; and/or, The buffer lining has a thickness of 1-15 mm, preferably 3-10 mm; and/or, The shell and the buffer inner lining are bonded by double-sided adhesive. 4. The medical protective headgear according to claim 1, characterized in that, the medical protective headgear shell is prepared from a copolyester material, and the copolyester material includes copolyester X and copolyester X Polyester Y; wherein said copolyester X comprises aliphatic diacid and/or its derivative segment, aromatic diacid and/or its derivative segment and diol segment; said diol segment comprises At least one diol segment with a ring structure segment and at least one aliphatic diol segment; wherein the aromatic diacid and/or its derivative segment account for the total diacid and/or its derivative chain The molar percentage of segment is 15～60%; Wherein said copolyester Y comprises aliphatic diacid and/or its derivative segment, aromatic diacid and/or its derivative segment and at least one aliphatic diol segment; wherein aromatic diacid and The molar percentage of/or its derivative segments in the total diacid and/or its derivative segments is 50-95%. 5. The medical protective headgear according to claim 4, wherein said copolyester X and copolyester Y are each independently random copolymer, alternating copolymer, block copolymer and graft copolymer and/or, the molecular weight range of the copolyester X and copolyester Y is 20000-200000, preferably 80000-150000. 6. The medical protective headgear according to claim 4, characterized in that, based on the total weight of the copolyester as 100 parts, the copolyester X is 50 to 99 parts, preferably 55 to 80 parts; and/ Or, the copolyester Y is 1-50 parts, preferably 20-45 parts. 7. The medical protective headgear according to claim 4, characterized in that, in the copolyester X, aromatic diacids and/or derivative segments thereof account for total diacids and/or derivative segments thereof 25-60 mole percent; and/or, In the copolyester X, the molar percentage of diol segments with ring structure in the total diol segments is 1-60%, preferably 5-25%; and/or, The molar ratio of the total diacid segments to the total diol segments in the copolyester X is (0.8-1):1, preferably (0.9-1):1; and/or, The molar percentage of the aromatic diacid and/or its derivative segment in the copolyester Y to the total diacid and/or its derivative segment is 60-85%; and/or, The molar ratio of the total diacid segments to the total diol segments in the copolyester Y is (0.8-1):1, preferably (0.9-1):1. 8. The medical protective headgear according to claim 4, characterized in that, the aliphatic diacid and/or its derivatives are selected from 1,4-butanedioic acid and/or its derivatives, 1,6- at least one of adipic acid and/or its derivatives; and/or, The aromatic diacid and/or derivatives thereof are selected from terephthalic acid and/or derivatives thereof; and/or, The diol with a ring structure is selected from at least one of 1,4-cyclohexanedimethanol, isosorbide, 2,2,4,4-tetramethyl 1,3-cyclobutanediol ;and / or, The aliphatic diol is selected from at least one of 1,3-propanediol/1,4-butanediol or 1,6-hexanediol. 9. The medical protective headgear according to claim 8, wherein the aliphatic diol segment in the copolyester X is different from the aliphatic diol segment in the copolyester Y; preferably, The aliphatic diol segment in the copolyester X comes from 1,4-butanediol; the aliphatic diol segment in the copolyester Y comes from 1,3-propanediol and/or 1,6- Hexylene glycol. 10. The medical protective headgear according to claim 4, characterized in that, taking the total weight of copolyester X and copolyester Y as 100 parts, it also contains 0.5 to 10 parts, preferably 1.5 to 8 parts essence. 11. The medical protective headgear according to claim 4, characterized in that, taking the total weight of copolyester X and copolyester Y as 100 parts, it also contains 1 to 15 parts, preferably 5 to 15 parts A lubricant, the lubricant is preferably at least one selected from stearic acid, butyl stearate, oleamide, ethylene bisstearamide and low-density polyethylene. 12. A preparation method for the medical protective headgear according to any one of claims 1 to 11, comprising extruding, molding and/or cutting the copolyester material successively to obtain the front splint and the medical protective headgear For rear splint profiles, the extrusion is preferably melt extrusion. 13. a kind of preparation method of medical protective headgear according to claim 12, is characterized in that, The extrusion temperature is 90-230°C, preferably 110-170°C; and/or, The molding method is injection molding and/or compression molding. 14. A method of using the medical protective hood according to any one of claims 1 to 11, comprising heating the shell of the medical protective hood to fully soften it, and then rapidly reducing it to an acceptable temperature for the human body, according to The shape of the patient's head and the distribution of the wound are shaped; after the shaping is completed, wait for it to harden, and then fix the buffer lining on the side of the shell that is in contact with the head with double-sided tape.

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