JPH04194079A - Antibacterial, mildew-proofing and deodorizing nonwoven fabric having hydrophilicity - Google Patents

Abstract

PURPOSE:To obtain the subject deodorizing nonwoven fabric having permanent hydrophilicity by fixing a composite material composed of a deacetylated chitin and fine cellulose powder to a nonwoven fabric made of thermoplastic polymer filaments. CONSTITUTION:A nonwoven fabric made of filaments of a thermoplastic polymer selected from polyester, polyolefin and polyamide is coated with an aqueous solution produced by uniformly dispersing fine cellulose powder in an aqueous solution of chitosan or lightly decomposed chitosan and an organic acid or inorganic acid. The coated fabric is dried and heat-treated to form a composite material composed of the deacetylated chitin and the fine cellulose powder and obtain the objective non-toxic deodorizing fabric having hydrophilicity and durable antibacterial property, mildew-proofing property and deodorizing property.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention has highly durable antibacterial, antifungal, deodorizing, and permanent hydrophilic properties, and is applicable to general clothing materials, hospital bedsheets, bandages, diapers, etc. The present invention relates to a long fiber nonwoven fabric that can be suitably used as a material for medical sanitary materials, sheets, bedding materials such as duvet covers, etc.

(Prior Art) In recent years, many textile products that have been treated with antibacterial and deodorizing treatments have been proposed due to the need to create a healthy and comfortable living environment.

For example, Japanese Patent Publication No. 63-54013, Japanese Patent Publication No. 63-54013,
No. 175117 and Japanese Unexamined Patent Publication No. 1-250413 disclose antibacterial metals (Ag, Cu, etc.) supported on zeolite.

It has been proposed that antibacterial properties be imparted by ionic dissociation of Zn). Furthermore, methods have been proposed in which various antibacterial agents such as biguanite derivatives and organic silicon quaternary ammonium salts are applied to fibers and fabrics in order to impart antibacterial properties.

However, the fibers and fabrics obtained by these methods may be harmful to the human body depending on the intended use.

This poses a hygiene problem, especially for newborns and other people with sensitive skin.

Therefore, in recent years, attempts have been made to apply chitosan or chitosan derivatives, which are non-toxic to the human body and extremely safe, to antibacterial products.

Examples of products that utilize the antibacterial properties of chitosan include JP-A-62-83875 and JP-A-63-10262.
Publication No. 3 proposes a film and a fishing net to which chitosan is added. The safety of chitosan is also supported by the fact that chitin containing chitosan has been used as food for agricultural products such as crabs, shrimp, insects, and mushrooms. In addition, it has recently been added to diet foods and is included in the list of natural food additives compiled by the Ministry of Health and Welfare.

In addition, D-glucosamine, which is a constituent unit of chitosan, has 1
It is known that it exists as a constituent substance responsible for physiological functions in the body and has nine metabolic functions.

Furthermore, in a search for general toxicity and local toxicity using mice and rats, no acute toxicity or mutagenicity was found, and it was reported to be almost non-irritating in a nine-person patch test.

However, the conventional example is not suitable for general clothing materials, medical hygiene materials, etc.
It did not apply to items that come into direct contact with the human body.

(Problems to be Solved by the Invention) The present invention is non-toxic to the human body, extremely safe, has highly durable antibacterial properties, anti-fungal properties, deodorizing properties, and permanent hydrophilic properties, and can be used as a general clothing material, The object of the present invention is to provide an excellent long fiber nonwoven fabric that can be suitably used as a material for medical sanitary materials or bedding materials.

(Tanu's Means for Solving the Problem) The present inventors have conducted intensive studies to solve the above problem, and as a result 1
We have arrived at the present invention. In other words, the present invention is as follows.

A nonwoven fabric made of long fibers of a thermoplastic polymer.

An antibacterial, antifungal, and deodorizing nonwoven fabric having hydrophilic properties, characterized in that a composite consisting of deacetylated chitin and fine cellulose powder is fixed to the nonwoven fabric.

The main points are as follows.

First, the hydrophilic, antibacterial, antifungal, and deodorizing nonwoven fabric of the present invention will be described.

The long-fiber nonwoven fabric of the present invention is composed of long fibers of a thermoplastic polymer, and has a composite composed of deacetylated chitin and fine cellulose powder fixed to the nonwoven fabric. The long fibers constituting the nonwoven fabric of the present invention are made of a thermoplastic polymer having fiber-forming properties, and are made of a single polymer or a composite of two or more polymers in a core-sheath type or side-by-side type. It is what was done. Polyethylene terephthalate is a thermoplastic polymer.

Polyesters such as polybutylene terephthalate, copolymerized polyester, and linear low-density polyethylene.

Polyolefins such as low density polyethylene, high density polyethylene, polypropylene, or nylon 6, nylon 66, nylon 610. Examples include polyamides such as nylon 46, and in the case of composite fibers.

Examples include a combination of polyethylene terephthalate and high-density polyethylene, a combination of polypropylene and linear low-density polyethylene, and a combination of a polypropylene homopolymer and a polypropylene copolymer in which ethylene is randomly copolymerized. Although the filament fineness of the long fibers is not particularly limited, it is preferably 5 deniers or less, preferably 2 deniers or less, especially when flexibility is required in applications such as medical hygiene materials and bedding materials.

The cross-sectional shape of the fibers may be an irregular shape such as a round ring or a triangular shape, or a hollow cross-sectional shape.

The nonwoven fabric referred to in the present invention is composed of the long fibers described above. This non-woven fabric has a basis weight of Log/m' or more 200
Above 200/rn' or below, basis weight 10g/mm
If it is less than that, the basis weight is so low that not only is it difficult to produce a uniform nonwoven fabric, but also the value of the nonwoven fabric is poor. On the other hand, if the basis weight exceeds 200 g/m', the basis weight will be too high and the nonwoven fabric will become thick and hard, making it undesirable for use as a material for clothing or medical and sanitary materials.

As described above, the hydrophilic antibacterial, antifungal, and deodorizing nonwoven fabric of the present invention has a composite composed of a deacetylated chitin product and fine cellulose powder fixed to the nonwoven fabric. The deacetylated chitin, which is an antibacterial, antifungal, and deodorizing ingredient in the present invention, is obtained by removing impurities such as calcium and protein from the outer shells of crustaceans such as crabs and shrimps by acid and alkali treatment. Examples include so-called chitosan, which is a high-molecular-weight polymer with a molecular weight of several hundred thousand and has a ryomimino group, which is obtained by deacetylating the chitin obtained by acid treatment or enzyme treatment. Alternatively, a relatively low molecular weight polymer having a molecular weight of several thousand to tens of thousands obtained by appropriately decomposing chitosan by acid or enzyme treatment may be used. The parent-child cetylation degree of chitosan is preferably 50% or more in consideration of solubility in organic acids and inorganic acids and antibacterial properties.

Also, what is the cellulose fine powder referred to in the present invention?

It is a fine powder made by crushing cellulose bulb with a disc refiner, etc., and has a diameter of approximately 0.1μ and a length of several hundred μ.
It consists of very fine cellulose. Note that this fine cellulose powder does not need to be particularly highly pure, as long as it can be suspended in water.

Next, a method for producing the hydrophilic, antibacterial, antifungal, and deodorizing nonwoven fabric of the present invention will be described.

In the present invention, first, long fibers made of the polymer are spun using an ordinary melt spinning device, taken out by a taking means such as an air sucker, and after opening, deposited on a collecting surface of a web conveyor etc. to form a web. Alternatively, while being taken up by a take-up roller, the web is continuously stretched between a take-up roller and a stretching roller, and then opened to form a web. The take-off speed depends on the fineness of the single yarn and the type of polymer, but it is usually 2,500 to 2,500 when using a take-off means such as an air sucker.
The speed is preferably about 5000 m/min, or about 100 to 500 m/min when a take-up roller is used. Next.

The obtained web is subjected to embossing treatment using an embossing roller to form a nonwoven fabric. The embossing process conditions are usually a linear pressure of the embossing roller of 30 to 100 kg/Cm,
The temperature of the embossing roller is 5 to 3 times higher than the melting point of the thermoplastic polymer constituting the fibers, although it varies depending on the type of thermoplastic polymer.
The temperature should be about 0°C lower. In the case of composite fibers, the temperature is 5 to 30°C below the melting point of the low melting point component of the polymer constituting the fiber.
It is best to keep the temperature fairly low. Next, a mixed treatment solution of an aqueous solution of an organic or inorganic acid salt of a deacetylated chitin product 1, such as chitosan or a mildly decomposed product of chitosan, and an aqueous suspension of fine cellulose powder is applied to the obtained nonwoven fabric. .

Application methods include dipping and spraying.

A vat dry method or the like can be used. As for the painting.

It may be carried out at any step between the spinning step and the web winding step. For example, it may be applied to the fiber yarn immediately after spinning and then opened, or it may be applied to the fiber yarn immediately after spinning and opened after being stretched with a roller. It is preferable to apply it in the application process provided between windings.

The treatment liquid is prepared by the following method. First, chitosan or a mildly decomposed product of chitosan is swollen in water and then dissolved in acid. The acids used for solubilization include organic acids such as formic acid, acetic acid, lactic acid, citric acid, adipic acid, gluconic acid, and tartaric acid, or hydrochloric acid.

Inorganic acids such as phosphoric acid can be used. Separately.

A fine cellulose powder is added to water and stirred using a high-speed stirrer to create an aqueous suspension of the fine cellulose powder. Next, a treatment liquid is prepared by adding an aqueous solution of the chitosan or an inorganic acid salt or an organic acid salt of a mildly decomposed product of chitosan to the aqueous suspension of the cellulose fine powder and uniformly mixing the mixture.

Next, after applying the treatment liquid to the nonwoven fabric.

Dry and heat treat. Drying and heat treatment are carried out in a normal hot air circulation type dryer to evaporate moisture and form a composite consisting of deacetylated chitin and fine cellulose powder, which is then fixed onto the surface of the constituent fibers of the nonwoven fabric. let The heat treatment temperature is the heating temperature necessary for the crosslinking complex reaction between the deacetylated chitin product and the fine cellulose powder.

Usually, the temperature is preferably 5° C. or more lower than the melting point of the thermoplastic polymer constituting the long fiber nonwoven fabric. The application speed is usually 10 to 100 m/min, which is the production speed of nonwoven fabric.
High-speed processing of up to 100 m/min is possible, and there is no restriction on production speed. The amount of adhesion can be adjusted due to differences in coating method, coating speed, viscosity of the processing solution, etc. by changing the concentration of the processing solution. As described above, the treatment liquid may be applied online during the nonwoven fabric manufacturing process, or may be applied offline to the nonwoven fabric that has been wound up.

(Function) As described above, the antibacterial, antifungal, and deodorizing nonwoven fabric having hydrophilic properties of the present invention has a composite made of a deacetylated chitin product and a fine cellulose powder fixed to a long fiber nonwoven fabric made of a thermoplastic polymer. Therefore, it not only exhibits highly durable antibacterial, antifungal, and deodorizing properties, but also exhibits permanent hydrophilicity. Regarding the antibacterial effect of chitosan, it is known that it inhibits the growth of mold and Bscherichia coli (
coli), 5taptiylo-coccus au
reus (Staphylococcus aureus), Pseudomon
asaeruginosa (Pseudomonas aeruginosa), Bacchi
It has been reported that it has an inhibitory effect on the growth of Durham-positive and Durham-negative bacteria such as B. llus 5ubtilis (Bacillus subtilis). Although the details of the mechanism of these antibacterial effects are unknown,
The cationic amino group of quaternized chitosan adsorbs anion constituent substances in the bacterial cell wall, resulting in inhibition of cell wall biosynthesis or active transport of substances inside and outside the wall, resulting in antibacterial activity. It is estimated that

The antibacterial, antifungal, and deodorizing nonwoven fabric having hydrophilic properties of the present invention has the following characteristics:
Demonstrates highly durable antibacterial, antifungal, and deodorizing properties.

In other words, the amino groups present in the molecules of chitosan or mildly decomposed chitosan react with the carbonyl groups in cellulose to form a crosslinked complex, and this complex is firmly fixed to the fiber surface, resulting in improved durability. It exhibits rich antibacterial properties, mildew resistance, and odor resistance. Therefore, it has a high degree of peeling resistance and drop-off resistance against physical friction or impact during post-processing processes or when used as a product, as well as excellent washing resistance, dry cleaning resistance, and water jet needle resistance. have

In the antibacterial and deodorizing nonwoven fabric of the present invention, the antibacterial, antifungal, and deodorizing activity is reduced due to the crosslinking reaction between the amino groups of chitosan and the carbonyl groups of cellulose. There will be no decline. Also 9
The antibacterial, antifungal, and deodorizing nonwoven fabric having hydrophilic properties of the present invention has the following characteristics:
Since fine cellulose powder is fixed to the nonwoven fabric, it exhibits permanent hydrophilicity. Furthermore, many molds and bacteria that exist around us assimilate sweat components adsorbed on underwear and socks and multiply, producing unpleasant odors.9 According to the nonwoven fabric of the present invention, chitosan or It is also possible to suppress the odor generation by suppressing it with an organic or inorganic acid salt of a mildly decomposed product of chitosan. Therefore, the hydrophilic antibacterial, antifungal, and deodorizing nonwoven fabric of the present invention can be suitably used as a material for general clothing, medical hygiene materials, and bedding materials. Furthermore, since the nonwoven fabric of the present invention has both antibacterial durability and permanent hydrophilicity, it can be suitably used not only for disposable applications but also for applications that require durability.

Example Next, the present invention will be specifically explained based on Examples.

In the examples, as a deacetylated product of chitin, BL
The viscosity measured using a type viscometer at a sample concentration of 1% by weight and a temperature of 20°C was 9.8 centipoise, and the degree of deacetylation was 91.
．． 6% chitosan was used. In addition.

After adding 25 parts by weight of ion-exchanged water to 1 part by weight of this chitosan to swell the chitosan, 0.2 parts by weight of glacial acetic acid and 23.8 parts by weight of ion-exchanged water were added to prepare a chitosan acetate aqueous solution. . Separately, as cellulose fine powder, Selish (α-cellulose 9) manufactured by Daicel Chemical Industries, Ltd.
A DP grade of 6%, 25% solids by weight of water (trademark) was used. After adding 11.5 parts of ion-exchanged water to 1 part by weight of this fine cellulose powder, a uniform suspension was prepared by stirring for 5 minutes using a household mixer.

Next, while stirring the chitosan acetate aqueous solution, the cellulose fine powder aqueous suspension was added and mixed uniformly.

It was used as a treatment liquid for nonwoven fabric. In addition, upon mixing, the compatibility of the two liquids was good, and the mixed liquid was stable without agglomeration and sedimentation even when left standing for a long period of time. The mixing weight ratio of cellulose and chitosan was adjusted by changing the respective liquid volume ratios. Also.

The amount of coating applied to the nonwoven fabric was adjusted by changing the concentration of the treatment liquid.

Antibacterial properties were evaluated by measuring the bacterial reduction rate (%) using the shake flask method (an antibacterial effect testing method certified by the Textile Sanitation Processing Council). Antibacterial durability was determined by measuring the bacterial reduction rate of the nonwoven fabric after washing it 10 times with a neutral detergent. The cleaning resistance was evaluated by measuring the ratio, and the water resistance was evaluated by measuring the bacteria reduction rate of the nonwoven fabric after water jet needle treatment. In addition, in the above evaluation, the bacterial strain used was Pneumoniae ATCC43.
52 was used.

Tree parentness is measured on the nonwoven fabric side placed horizontally on a filter paper.
Of the 10 drops of ion exchange water dropped from a height of cm,
Evaluation was made by determining the number of absorbed drops as a percentage.

The ion-exchanged water was dropped from a 50-mm burette at a rate of 1 drop per 1 second.

The tensile strength of the nonwoven fabric is 2 widths 30111111 according to the strip method described in JIS L-1096. length 10
The maximum tensile strength was determined from a 0 mtn test piece.

Example 1 Melting point: 128°C, melt index: 80 g/
A 10-minute polyethylene polymer A and a polyester polymer B having a melting point of 258°C and an intrinsic viscosity of 0.70 are spun from 4 spinnerets having 200 composite spinning holes, and 1 polymer A is used as a sheath component 1 polymer. A core-sheath composite type long fiber containing B as a core component was spun. Single hole discharge amount is 1 polymer A.

0.6 g/min for both B (weight ratio of component A and component B is 1:1)
). After the spun long fiber yarn is cooled, it is sucked and drawn through eight air suckers placed 120 cm below the spinneret, taken off at a speed of 3000 m/min, and forced by a charging device. The fibers were opened by electrostatically charging and deposited on the surface of a web conveyor moving at a speed of 30 m/min to obtain a web.

Next, an embossing roll with a pressure contact area ratio of 15% and a surface heating temperature of 123°C was applied to the obtained web, and a line pressure of 30 kg was applied.
/cm to obtain a nonwoven fabric. The obtained nonwoven fabric has a basis weight of 30 g/m', a longitudinal tensile strength of 4.7 kg/3 cm, a transverse tensile strength of 3,
It was 5 kg/3 am.

Next, a mixed treatment solution of an aqueous chitosan acetate solution and an aqueous suspension of cellulose fine powder was applied to the composite long fiber nonwoven fabric wound into a roll. As for the painting.

Using a separate vat dryer, it was immersed in a mixed treatment solution prepared to a predetermined concentration, squeezed with a nip roller at a linear pressure of 4.0 kg/cm, and then subjected to dry heat treatment in a hot air circulation dryer at a temperature of 120°C. I wound it up. The processing speed was 10 m/min. In addition, when applying the treatment solution, ion-exchanged water was added to the treatment solution to change the concentration, and long fiber nonwoven fabrics (Examples 1-1 to Example 1-1
2) was collected.

Comparative Example 1 A treatment was performed in exactly the same manner as in Example 1, except that ion-exchanged water was sprayed instead of the mixed treatment solution of an aqueous chitosan acetate solution and an aqueous suspension of fine cellulose powder.

The results of the mixed weight ratio of chitosan to cellulose, the adhesion amount of the composite consisting of chitosan and cellulose, the shake flask bacterial reduction rate, and the hydrophilicity of the long fiber nonwoven fabrics obtained in Examples 1-1 to 1-12, The weight ratio of chitosan to cellulose is 1:0.2. A nonwoven fabric having a composite adhesion amount of chitosan and cellulose of 80.5XIO-3 g/m' was cleaned with a petroleum-based detergent and a halogen-based detergent (Examples 1 to 13 and 1-14). ), and nonwoven fabrics (Examples 1-15 and 1-1) that were similarly treated with water jet needles four times at water pressures of 600 lbs/in 2 and 1400 lbs/in 2 respectively.
Table 1 shows the bacterial reduction rate and hydrophilicity results for 6) and Comparative Example.

As is clear from Table 1, the nonwoven fabrics to which a certain amount or more of the composites of chitosan and cellulose of Examples 1-6 to 1-8 and Example 1-10-1-12 were fixed had a higher bacteria reduction rate. It had an extremely high bacteria reduction rate after 10 washes, and was hydrophilic. Also,
The nonwoven fabrics of Examples 1-13 and 1-14 after the cleaning treatment and the nonwoven fabrics of Examples 1-15 and 1-16 after the water jet needle treatment both had high bacteria reduction rates.

It also maintained its parentage.

Example 2 A polyester polymer B with a melting point of 258°C and an intrinsic viscosity of 0.70 was added to a polyethylene polymer with a melting point of 128°C and a melt index of 80 g/10 minutes through a composite spinning hole 200.
A core-sheath composite type long fiber was spun from four spindles having holes, with one polymer A as a sheath component and one polymer B as a core component. The single-hole discharge rate was 0.6 g/min for both polymers A and B (weight ratio of component A and component B was 1:1). After cooling the spun long fiber yarn.

The spinneret was sucked and drawn through eight air suckers placed at 120 C[l+] below the spinneret, and 3000 rn/
The fibers were taken out at a speed of 30 m/min, opened by forcibly charging with a charging device, and deposited on the surface of a web conveyor moving at a speed of 30 m/min to obtain a web. next.

Using an embossing roll with a pressure contact area ratio of 15%9 and a surface heating temperature of 123° C., the web was thermally bonded at a linear pressure of 30 kg/am to obtain a nonwoven fabric.

Next, a mixed treatment solution of a chitosan acetate aqueous solution of a predetermined concentration and an aqueous suspension of cellulose fine powder was sprayed and applied, and then passed through a nip roller with a linear pressure of 4 kg/cm. Next, the nonwoven fabric was subjected to a dry heat treatment by passing through a hot air circulation dryer at a heating temperature of 120°C.

It was wound up into a roll. The obtained nonwoven fabric has a basis weight of 3
0g/m', longitudinal tensile strength is 5.2 kg/3
cm, horizontal tensile strength is 3. '8kg/3cm
Met.

Comparative Example 2 A treatment was carried out in the same manner as in Example 2, except that ion-exchanged water was sprayed instead of the mixed treatment solution of a chitosan acetate aqueous solution and an aqueous suspension of cellulose fine powder, with a basis weight of 30 g/m', A nonwoven fabric having a tensile strength in the warp direction of 5.1 kg/3 cm and a tensile strength in the transverse direction of 3.7 kg/3 cm was obtained.

Example 3 Melting point: 128°C, melt index: 80 g/10
Polyethylene polymer A with a melting point of 258°C and a polyester polymer B with an intrinsic viscosity of 0.70 are mixed into a composite spinning hole 20.
A core-sheath composite type long fiber was spun from four spindles having 0 holes, with nine polymers A as a sheath component and one polymer B as a core component. The single-hole discharge rate was 0.6 g/min for both polymers A and B, and the weight ratio of component A and component B was 1:1). After cooling the spun long fiber yarn.

It is taken up at a speed of 250 m/min by a group of heating rollers with a surface temperature of 75°C.
It was stretched between a group of heating rollers at a magnification of 4.0.

Next, the drawn fiber yarn is sucked through 16 air suckers, forcibly charged with a charging device to open the fibers, and deposited on the surface of a web conveyor moving at a speed of 10 m/min to form a web. Next, the pressure contact area ratio on the web is 15
%2Using an embossing roll with a surface heating temperature of 123℃,
A nonwoven fabric was prepared by thermal bonding treatment at a linear pressure of 30 kg/cm.

Next, a mixed treatment solution of a chitosan acetate aqueous solution of a predetermined concentration and an aqueous suspension of cellulose fine powder was applied by spraying, and then a linear pressure of 4. Passed through nip rollers of Okg/cm.

Next, the nonwoven fabric was dried by passing through a hot air circulation dryer at a heating temperature of 12 Ct', and then wound up into a roll. The obtained nonwoven fabric had a basis weight of 30 g/m'', a longitudinal tensile strength of 6.5 kg/3 cm, and a transverse tensile strength of 4.3 kg/3 cm.

Comparative Example 3 The same procedure as in Example 3 was carried out, except that ion-exchanged water was sprayed instead of the mixed treatment solution of chitosan acetate aqueous solution and cellulose aqueous suspension. A nonwoven fabric with a tensile strength of 6.2 kg/3 cm and a transverse tensile strength of 4.2 kg/3 cm was obtained.

Example 4 Contains 5% by weight of octene-1 and has a density of 0.937g
/cnf, a linear low-density polyethylene polymer having a melt index of 25 g/10 min was spun from four round spinnerets having 200 spinning holes, and a long fiber consisting of a single component of the polymer was spun. Single hole discharge amount.

It was set to 1.2 g/min. After cooling the spun filament thread, it is sucked and stretched through eight air suckers placed 100 cm below the spinneret, taken out at a speed of 4500 m/min, and forced by a charging device. The fibers were opened by being electrically charged and deposited on the surface of a web conveyor moving at a speed of 30 m/min to obtain a web.

Next, an embossing roll with a pressure contact area ratio of 15%9 and a surface heating temperature of 123°C was applied to the obtained web, and a line pressure of 30 kg was applied.
/cm to obtain a nonwoven fabric.

Next, a mixed treatment solution of a chitosan acetate aqueous solution of a predetermined concentration and an aqueous suspension of cellulose fine powder was applied by spraying, and then a linear pressure of 4. Passed through nip rollers of Okg/cm.

Next, the nonwoven fabric was dried by passing through a hot air circulation dryer at a heating temperature of 120°C, and then wound up into a roll. The obtained nonwoven fabric had a basis weight of 30 g/ml, a tensile strength in the warp direction of 2.8 kg/3 cm, and a tensile strength in the transverse direction of 2.1 kg/3 cm.

Comparative Example 4 Same as Example 4, except that ion-exchanged water was sprayed instead of the mixed treatment solution of chitosan acetate aqueous solution and cellulose aqueous suspension, and the fabric weight was 30 g/co, and the tension in the warp direction was applied. The strength was 3.0 kg/3 cm, and the tensile strength in the lateral direction was 2.3 kg/3 cm.

The mixed weight ratio of chitosan to cellulose of the long fiber nonwoven fabrics obtained in Examples 2 to 4, the adhesion amount of the composite consisting of chitosan and cellulose, the shake flask bacterial reduction rate, the hydrophilicity results, and the results of Comparative Examples 2 to 4. Table 1 shows the results of the bacteria reduction rate and hydrophilicity of the obtained long fiber nonwoven fabric.

As is clear from Table 1, the nonwoven fabrics to which the composites of chitosan and cellulose of Examples 2 to 4 were attached were
Despite being washed 0 times, the bacteria reduction rate was extremely high, and it had 100% hydrophilicity.

Table 1 Amount of adhesion of a composite of chitosan and cellulose to a nonwoven fabric, shake flask bacteria reduction rate, and hydrophilicity results (effects of the invention) The antibacterial, antifungal, and deodorizing nonwoven fabric having hydrophilic properties of the present invention has the above-mentioned structure. It has highly durable antibacterial, antifungal, deodorizing, and permanent hydrophilic properties. Moreover, since it uses deacetylated chitin and fine cellulose powder,
It is non-toxic and does not cause any effects on the human body such as rash when used, making it extremely safe.

Therefore, the hydrophilic antibacterial, antifungal, and deodorizing nonwoven fabric of the present invention can be suitably used as a material for general clothing, medical hygiene materials, and bedding materials.

In addition, it has both antibacterial durability and permanent hydrophilicity, so
It can be suitably used not only for disposable applications but also for applications requiring durability.

Patent applicant Unitika Co., Ltd. Procedural amendment (voluntary) February 12, 1991 1, Case indication Patent application No. 2-319533 2, Title of invention Antibacterial, anti-mold, deodorizing nonwoven fabric with hydrophilic properties 3, Amendment Relationship with the case involving the person who filed the patent application Patent applicant address 1-50 Higashihonmachi, Amagasaki City, Hyogo Prefecture Name (45
0) Unitika Co., Ltd. 541 Address 4-1-3 Kutabe-cho, Chuo-ku, Osaka Name Unitika Co., Ltd. Patent Department ＼- 5 Contents of amendment (1) Specification page 15 line 19 ro, 6g / minute” to “
0.3g/min”.

(2) Change “ro, 6g/min” to “0” on page 19, line 1 of the specification.
．． 3g/min”.

(3) "ro, 6g/min" on page 20, line 13 of the specification
0.1g/min”.

(4) Change "rl, 2g/min" to "0" on page 22, line 5 of the specification.
．． 9g/min”.

Claims (1)

[Claims] (1) A nonwoven fabric made of long fibers of a thermoplastic polymer, which has hydrophilic antibacterial and antifungal properties and is characterized by having a composite made of deacetylated chitin and fine cellulose powder fixed to the nonwoven fabric. Odor-resistant non-woven fabric.