KR100533478B1 - Elasticity grant laminated non-woven fabric - Google Patents

Abstract

The present invention provides an elastic nonwoven fabric imparting elasticity to the nonwoven fabric sheet and the plastic film in order to improve the activity of the joint or flexion portion of the body when wearing the nonwoven doubles. In another aspect, the present invention is characterized by providing a breathable and stretchable non-woven laminated body by imparting breathability to the stretched plastic film.

Description

ELASTICITY GRANT LAMINATED NON-WOVEN FABRIC}

The present invention relates to a nonwoven fabric retainer for manufacturing work clothes provided with elasticity.

Conventional non-woven work clothes are used as work clothes for a variety of uses, such as painting work clothes, surgical clothes, event clothes, special work. The material of the conventional nonwoven coverall is a nonwoven laminate made by laminating a nonwoven fabric and a plastic film. Such nonwoven fabric is light and excellent in thermal insulation as a workwear material, but nonwoven fabric and plastic film are both non-elastic materials, and when they are laminated, the elasticity is further reduced. [0003] Conventional Korean Laid-Open Patent Publication No. 2001-66894 (2001.07.11) elastically stretched composite by bonding a stretchable film of a second web to a first web made of thermoplastic fibers and inelastically stretchable in one direction. However, this document describes a technique for producing a sheet. However, this document is made of thermoplastic elastomer, and a film having elastic elasticity in the running direction of the belt is supplied as a second web, and the first continuous fiber is placed on the film. The first web is made up, and the first and second webs are intermittently between the emboss rolls. The first composite web is welded to form a first composite web, and further stretched with the first to third rolls and then contracted to form a second composite web. In this prior invention, when welding the first web to the second web taking the form of a film and forming the joining portion, each area of the welded portion is 0.03 to 1 mm since the first web is formed of the first continuous fiber. It is to be small enough, or the sum of the individual areas is made to be about 1 to 10% of the surface area of the second composite sheet, and the first and second webs adhered by such welding parts are not easily separated, if necessary, The area of the joint is changed in the range of 0.03 to 10 mm, or the total of the areas can be changed in the range of 1 to 50% of the surface area of the second composite web. The reason why the junction area is an important technical configuration in the present invention is that the characteristics of the first web are one-way inelastic stretchable synthetic fibers, which are not provided with extensibility, and are extensible when the first web is joined with the second web. The first web is stretched to the second web while being narrowly spaced apart from the second web in order to impart the elasticity. Thus, after bonding, the first web is contracted in the reverse direction of the stretching axis by the second web, thereby providing elasticity. Such an elastic composite has a complicated manufacturing process, the first web and the second web is separated from the outer portion of the adhesive portion, the adhesive portion area is small, the first web and the second web can be separated and the elasticity is lost, and the elastic modulus is increased It contains technical problems such as not being able to.

The present invention seeks to provide a nonwoven fabric retaining elasticity as an invention for improving the above problems.

An object of the present invention is to provide a nonwoven fabric having elasticity that is flexibly adapted to the movement of a body surface by imparting second axis elongation to the nonwoven fabric, which is a base material of the laminate, by 10% to 150%.

An object of the present invention is to provide a stretchable nonwoven fabric retaining body manufactured by imparting second axis stretchability to a nonwoven fabric including a low cost nonwoven fabric (a nonwoven fabric imparted with a tissue force in an embossing pattern).

An object of the present invention is to provide a nonwoven fabric imparted with elasticity and breathability in which an inorganic material is contained in a plastic film.

The nonwoven fabric imparted to the present invention is a composite sheet in which elasticity and elasticity are imparted to a nonwoven fabric by bonding a stretchable nonwoven fabric and an elastic film to each other, having a capacity of 8 to 180 g / m 2, and having a first axis drawn to a second shaft embedded in the nonwoven fabric. A second axial stretchable nonwoven fabric having an elongation amount of 10% to 150% of the width of the nonwoven fabric contracted upon stretching; A plastic film having a capacity of 10 to 100 g / m 2 and having a first axis stretch to impart a second axis extensibility and impart breathability; A stretchable nonwoven laminated body manufactured by laminating the elongation axis in the second axial direction will be described in detail below.

1. Preparation of Second Axis Stretchable Nonwoven Fabric

Nonwoven fabrics used in the present invention as nonwoven fabric laminated breathable workwear fabrics include expensive non-expandable nonwoven fabrics with smooth surfaces, but inexpensive nonwoven fabrics mainly provided with an embossing pattern and organizational force are used. The present invention is a material of the work clothes fabric, by stretching the non-woven fabric of various quality as described above in the first axis direction to 10% to the critical stretching amount, the second axis elongation of 10% to 150% of the contracted nonwoven width Use it as work clothes fabric.

1) nonwoven fabric used in the present invention

In the present invention, the nonwoven fabric for imparting the second axis extensibility includes at least two layers of a polypropylene thermal bond nonwoven fabric, a polypropylene spunbond nonwoven fabric, a polypropylene melt blown nonwoven fabric, a polypropylene melt blown nonwoven fabric, and a polypropylene spunbond layer. Non-woven fabric, polyethylene nonwoven fabric, nylon nonwoven fabric, polyester nonwoven fabric, made of a mixture of one or more of bicomponent yarns, polypropylene yarns, polyethylene yarns, viscose yarns, polyester yarns and nylon yarns Non-woven fabrics such as nonwoven fabrics, airlaid nonwoven fabrics, air through nonwoven fabrics, spunlace nonwoven fabrics, and cotton yarn nonwoven fabrics. The embodiment of the present invention employs a polypropylene spunbond nonwoven fabric which can be obtained at the lowest price among the nonwoven fabrics.

2) Giving second axis extensibility to nonwoven fabric

Nonwoven fabrics are manufactured using embossing, hot air, hydraulic pressure, or adhesives to impart texture to a collection of nonwoven fibers in the manufacture. Nonwoven fabrics, which are imparted with organizational force by combining nonwoven fibers with hot air or water pressure, exhibit high quality characteristics with a soft touch, but are expensive. As another nonwoven fabric, an embossed pattern is added to the nonwoven fabric to bond the fibers of the nonwoven fabric to impart tissue force to the nonwoven fabric. The price of nonwovens is largely governed by the choice of manufacturing process. As a result, low-cost nonwovens are probably nonwovens given organizational power by embossing. The present invention imparts latent extensibility to the nonwoven fabric through the stretching. Specifically, by stretching the nonwoven fabric given the tissue force to the first axis (eg Y-axis, machine direction) from 10% to the critical stretching amount, shrinkage in the second axis direction (eg X-axis, width direction) is induced to the nonwoven fabric. As a result of shrinkage, extensibility up to 10% to 150% of the shrinkage width is inherent in the nonwoven fabric. The critical draw amount of the nonwoven fabric was 400% elongation of the nonwoven length given in the examples. When the stretch amount of the nonwoven fabric reaches 75% to 100%, the fibers of the nonwoven fabric are gathered neatly in the direction of the stretching axis, and the nonwoven fibers are re-arranged in the length direction in stretching to 100% to 400%.

If the direction of the nonwoven fabric drawing is set to be the same as the machine direction, the production equipment is reduced. However, although the economy is inferior, the result of inherent extensibility even if the stretching direction of the nonwoven fabric is set in the width direction is the same.

In the embodiment of the present invention, the second axial stretchability was imparted to the low-cost nonwoven fabric provided with tissue force by embossing. Specifically, the heat-adhesive spot pattern applied to the nonwoven fabric by embossing is cited in FIG. The heat-adhesive spot pattern figures cited are non-linear patterns such as diamonds, squares, hearts, and circles. The size and density of the heat-adhesive spot pattern are determined in consideration of the overlapping degree of the nonwoven fabric and the strength of the fiber pile.

Fig. 2 (A) shows a part of an example of the nonwoven fabric of the present invention in which an embossing pattern is formed on an embossing roll to impart a tissue force. In the example of FIG. 2 (A), the heat-bonded diamond pattern is uniformly distributed on the entire surface of the unit nonwoven fabric, and in FIG. A1 is given.

2 (B) shows a partial plane of the nonwoven fabric drawn in the machine direction of the tissue-strengthened nonwoven fabric in a heated state. In FIG. 2 (B), the nonwoven fabric imparted with the force of the tissue was first axially stretched for a given length, and thus the length D1 was extended. Narrowed down. As shown in Fig. 2 (B), the nonwoven fabric in which the fiber arrangement is realigned by uniaxial stretching is heated and adapted to the realignment state, and is cooled and fixed in the realignment state.

As described above, FIGS. 2A and 2B show that the pattern width A1 of the nonwoven fabric is narrowed to B1 due to the extension of the first axis in the machine direction, thereby corresponding to 10% to 150% of the width of the contracted nonwoven fabric. The second axis extensibility having a width C1 is inherent in the nonwoven fabric.

2. Preparation of Second Axis Extensible Plastic Film

Fig. 3A is a plan view before uniaxial stretching of a breathable plastic film. In the example of FIG. 3 (A), the widthwise reference width A2 of the unit film is given to determine the second contracted state after the first axial stretching. 3 (B) shows some planes of the plastic film drawn in the machine direction. In Fig. 3 (B), the plastic film was first axially stretched for a given length to extend the length D2, and despite the stretching of D1, the reference width A2 of the plastic film and the contrast width B2 after stretching were almost the same. This is due to the realignment of the molecular arrangement of the polymer, which is the material of the plastic film, to allow the stretching of the film.

1) Preparation of breathable plastic film

The breathable film used in the present invention is prepared in a pellet form by mixing a polymer and an inorganic material with a melting point of 100 ~ 180 ℃ melted in an extruder and molded into a breathable film having a capacity of 10 ~ 100g / ㎡ in T-die, The uniaxially stretched film is manufactured.

2) Giving uniaxial stretch to plastic film

The first axial stretching of the plastic film is stretched in the stretching apparatus of FIG. 5. In the Fig. 5 apparatus, the plastic film 21 is moved from one feed roll 22 to the other odor roll 23, and stretching rolls 24 and 25 having different moving speeds are installed between the two rolls 22 and 23. . The stretching roll 24 supplies the plastic film 21, and the stretching roll 25 pulls out the plastic film 21 faster than the feeding speed. Specifically, when the drawing rate of the nonwoven fabric of the stretching roll 25 is 100% faster than the feeding speed of the stretching roll 24, the plastic film is stretched 100% in the longitudinal direction. As described above, the length D2 of the unit plastic film of FIG. 3 (A) is extended in the first axis direction as in the unit plastic film of FIG. 3 (B) due to the difference in the plastic film conveyance speeds of the two rolls 24 and 25. However, unlike the nonwoven fabric, the reference width A2 and the contrast width B2 are almost the same. This is related to the arrangement of the molecular chains of the polymer, and the second axis extensibility represented by the width C2 is inherent as the molecular arrangement of the polymer is realigned by uniaxial stretching of the plastic film. In order to reduce the decrease in width during the stretching of the film, the film supporting pressure of the two stretching rolls is adjusted or a separate press roll is added.

3. Lamination of elongated nonwoven fabric and breathable film

As described above, FIGS. 2 and 3 show that the reference widths A1 and A2 are narrowed to B1 and B2, respectively, by the first axis stretching in the machine direction, thereby corresponding to 10% to 150% of the width of the contracted nonwoven fabric and plastic film. The second axis elongation widths C1 and C2 are inherent, respectively.

The present invention provides a laminated body of a non-woven fabric and a plastic film inherent in the second axial stretch as described above, if manufacturing the doubled as the laminated body, the pattern width of the part of the body touching the joints or curved portion of the wearing B1 and B2 easily stretch to the pattern widths A1 and A2, wherein the nonwoven fabric and the plastic film are in a biaxially stretched state. As described above, the doubles manufactured as the present invention can be stretched according to the movement of the body curved portion within the second axis elongation widths C and C2, so that the doubles do not interfere with the wearer's movement.

1) Fabrication of nonwoven fabric and breathable plastic film laminated body with second axis extension

6, an example lamination apparatus of a nonwoven fabric and a breathable plastic film provided with the present invention uniaxial stretch is cited. In FIG. 6, the nonwoven fabric 11 provided with the second axial stretchability is supplied to the lamination rolls 46 and 36 by matching the first axial direction with the machine direction in the roll 32. As shown in FIG. The plastic film 21 is provided with an adhesive layer on the adhesive surface in the adhesive applying device 43 before lamination. The adhesive applying device 43 may be an adhesive layer providing device by a coating roll or an adhesive applying device by a spray. Alternatively, the adhesive applying device may be omitted when the adhesive layer is previously applied to the plastic film. The plastic film 21 and the nonwoven fabric 11 provided with the adhesive layer are bonded by heating and pressing in the adhesive rolls 46 and 36, and cooled in the cooling chamber 37 to impart a second axial extension and provide breathability. The nonwoven fabric lamination 41 is wound by the roll 33.

4. Manufacturing of Doubles

In the use example of Fig. 7, the double layer pattern was applied to the present invention (41). The first axis of the paper body 41 is indicated by L, and the width inherent in extensibility is indicated by W. In FIG. When the pants are applied by the pattern of FIG. 7, the pants are well stretched in the width (W) direction, and particularly in the buttocks (a) and knees (b), they are well stretched in the width (W) direction. The stretching direction may be different from that of FIG. 7 by using the method of the present invention, and may be used only as a part of a garment.

Example 1:

Nonwoven fabric for manufacturing work clothes was manufactured with the following materials and specifications.

1) Nonwoven

Polypropylene Spunbond Nonwoven Fabric (Capacity 30g / ㎡)

Drawing ratio (roll speed difference): 2 to 1 (100% of drawing amount)

Feed speed of drawing feed roll: 15m / min

Drawing speed of drawing rolls: 30m / min

The stretch resulted in a 50% reduction in the nonwoven fabric width of 1.5m.

As a result, the second axis stretchable polypropylene spunbond nonwoven fabric was manufactured.

2) breathable film

Breathable film with a capacity of 30 g / m2 manufactured using compound for breathable film (SK Chemical Grade AT810)

Drawing ratio (roll speed difference): 2 to 1 (100% of drawing amount)

Feed speed of drawing feed roll: 30m / min

Drawing speed of drawing rolls: 60m / min

3) lamination

The nonwoven composite and plastic film given with uniaxial stretch were manufactured as described above under the following conditions.

Adhesive used: Adhesive diluted by adding 50 parts by weight of solvent to 100 parts by weight of National Starch DT-7801D

Adhesive Coating Machine: Gravure Roll Coating Machine

Paper Roll: Pressurized Roll for Heating Industry

Chiller: Blow Cooling

3) Test

As a uniaxial creep and breathable nonwoven fabric prepared in Example 1, nonwoven fabric coveralls and pants were manufactured and subjected to a test. Contracted until. As a result, the joints or curved parts of the body could be moved easily and comfortably. A and B two test groups assigned to each adult male for 10 wearing tests were organized, and the A group was worn with the upper and lower doubles of the work clothes made of the present invention, and the B group was not imparted with uniaxial elongation. The work clothes were worn in a sieve and group A and B were bent and extended at the same time for 60 seconds. As a result, group A could hardly feel any obstacles when moving joints and confirmed comfortable breathability in work, but group B complained of severe disorders when moving joints.

As described above, the present invention provides a nonwoven fabric retardant that is flexibly adapted to movement of a body surface when manufacturing a double suit such as work clothes by providing a second axis elongation of 10% to 150% to a nonwoven fabric that is a base material of a laminated body. The present invention is to provide a stretch and breathable nonwoven fabric impregnated with a low-cost nonwoven fabric (nonwoven fabric imparted with a tissue force in the embossed pattern) as a nonwoven fabric, and impregnated with an inorganic material in the plastic film to impart breathability .

1 is an illustration of a nonwoven embossing pattern

Figure 2 (A) is a plan view of a nonwoven fabric before stretching

Fig. 2B is a plan view of a uniaxially stretched nonwoven fabric

Figure 3 (A) is a plan view of a plastic film before stretching

Figure 3 (B) is a plan view of a uniaxial stretched plastic film

4 is a schematic view of a nonwoven fabric stretching apparatus;

5 is a schematic view of a plastic film stretching apparatus;

Figure 6 is a lamination device of the stretched nonwoven fabric and stretched film

Figure 7 is an example of cutting pants round shape using the present invention nonwoven laminated sheet

<Description of Major Reference Drawings>

11: Nonwoven fabric with second axis extension 21: Plastic film with second axis extension 41: Nonwoven fabric with second axis extension

Claims (4)

A composite sheet in which elasticity and elasticity are imparted to a nonwoven fabric by bonding a stretchable nonwoven fabric and an elastic film, A second axial stretchable nonwoven fabric having a capacity of 8 to 180 g / m 2 and having a first axial stretch and a second axial stretch amount inherent in the nonwoven fabric, wherein the second axial stretch amount is 10% to 150% of the width of the nonwoven fabric contracted at the time of stretching; A plastic film having a capacity of 10 to 100 g / m 2 and having a first axis stretch and having a second axis stretchability; A stretchable nonwoven laminated body imparted with a second axial direction elasticity by laminating such that the second axial direction coincides. delete The non-woven fabric of claim 1, wherein the first axial stretchable nonwoven fabric comprises at least two layers of polypropylene thermal bond nonwoven fabric, polypropylene spunbond nonwoven fabric, polypropylene melt blown nonwoven fabric, polypropylene melt blown nonwoven fabric, and polypropylene spunbond fabric. Bonded nonwoven fabric, polyethylene nonwoven fabric, nylon nonwoven fabric, polyester nonwoven fabric, non-woven fabric made by mixing at least one of bicomponent yarn, polypropylene yarn, polypropylene yarn, polyethylene yarn, viscose yarn, polyester yarn and nylon yarn mixed with polypropylene and polyethylene, Stretch nonwoven fabric selected from Airlaid nonwovens, Air through nonwovens, Spandlace nonwovens and Cotton yarn nonwovens. The stretchable nonwoven fabric of Claim 1, wherein the plastic film in which the first axis is stretched and the second axis extensibility is embedded is a film to which breathability is imparted.