KR101912828B1 - Non-swelling porous film and manufacturing method tereof and its use using the same - Google Patents

Abstract

The present invention relates to a breathable and waterproof film of non-swellable pore type, a method for producing the same, and a use thereof.
The present invention relates to a microporous polyurethane layer formed of a hydrophobic porous polyurethane layer and a polytetrafluoroethylene (PTFE) single membrane layer on one or both sides of the polyurethane layer by wet lamination to form a polyurethane coating composition The PTFE single membrane layer is partially recessed to have a certain thickness, thereby improving the physical strength, scratch resistance and water resistance performance as well as tactile and high permeability while maintaining the interlayer pores. Particularly, the conventional waterproof breathable waterproof functional film Swellable air-permeable waterproof film which can overcome the disadvantages of the present invention, and can be used as a fabric for outdoor breathable and breathable waterproof breathable and breathable waterproof breathable and waterproof medical protective films useful for surgical gowns or patient drapes. It can be usefully applied as a fabric.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-repellent, water-repellent, non-swellable air-permeable waterproof film,

The present invention relates to a non-swelling pneumatic water-permeable film, a method for producing the same, and a use thereof, and more particularly, to a pneumatic water-repellent film having a microporous polyurethane layer formed of a hydrophobic porous polyurethane, A single membrane of polytetrafluoroethylene (hereinafter referred to as " PTFE ") is wet-laminated on one side or both sides of the polyurethane layer to partially mold the PTFE single membrane into a polyurethane coating composition, Swellable air permeable waterproof film while maintaining the pores, and to its use for moisture permeable and breathable waterproof outdoor fabrics and protective fabrics for medical use.

Thermoplastic polyurethanes are excellent in physical properties such as low temperature properties, flexural resistance, abrasion resistance and heat processability and are widely used in a variety of fields such as shoes, clothes, and bags. Especially, it is useful as a breathable and waterproof fabric material widely used in various active sportswear and casual wear such as skiing, golf wear, hiking, climbing, jogging suit, and the like.

Generally, the breathable and waterproof fabric is formed with a coating layer on the fabric so that raindrops of 100 μm can not pass through the fibers outside of the fiber and the water of 0.0004 μm emitted from the body of the body can flow out of the fibers.

Methods of imparting such a moisture-permeable and waterproof function can be classified into a direct coating method or a transfer coating method.

The direct coating method is classified into a dry coating method in which a coating liquid is directly applied to a fabric and then passed through a dryer, and a wet coating method in which pores are formed by impregnating the coagulating liquid instead of the dryer. Further, the transfer coating method is further classified into a semi-dry lamination method or a wet lamination method.

In this case, the conventional breathable and waterproof fabric using a direct coating method using polyurethane causes environmental pollution by using a solvent harmful to the environment such as DMF (dimethylformamide) and MEK (methyl ethyl ketone), and recently, A dry polyurethane type moisture permeable protective film is prepared by using an acid type polyurethane coating liquid and multi-stage drying method, and a dry coating method using a hydrophilic non-porous polyurethane are studied.

Accordingly, Korean Patent No. 0795386 discloses a moisture-proof, moisture-proof type waterproofing fabric using a hydrophilic polyol of a soft segment of polyethylene glycol or polypropylene glycol.

However, according to the nature of the non-porous hydrophilic property, the thicker the coating layer, the lower the moisture permeability, the more swelling phenomenon occurs, and the tactile sensation becomes wet.

Korean Patent Laid-Open Publication No. 2008-0042309 discloses a coating composition for moisture-permeable and waterproofing, a dry and non-air-permeable waterproofing fabric using the same, and a method for producing the same. The hydrophilic polyurethane is coated in a two- , A coating method capable of reducing environmental pollution and ensuring excellent coating quality is proposed.

However, the dry coating method using the hydrophilic nonporous polyurethane has disadvantages such as poor environmental durability as well as environmental pollution, and has the disadvantage that the hydrophilic non-porous polyurethane absorbs water droplets formed on the surface of the coating and swells.

Accordingly, although the waterproof breathable fabric for outdoor use and clothes using the above hydrophilic non-airborne type film have a large market size, they have a disadvantage of causing consumers to feel tired. Therefore, recently, There is an increasing demand for non-swelling functional films.

Therefore, as a substitute for non-swellable functional films, there is a tendency for the non-swellable functional films of the non-swellable type to show a tendency of regression, and the demand thereof is steadily increasing.

However, the representative product of the hole type is the film by the wet coating method, and it is inevitable that the problem of using excessive solvent (DMF), which is a substance subject to normal environment regulation,

In addition, the wet type has a maximum of 5,000 mmH ₂ O, which is the limit of the water pressure performance. To improve this, the surface top treatment is performed to obtain 8,000 mmH ₂ O (Japanese TORAY entrant) As a result, when the surface top treating resin is a hydrophilic nonporous type, there is a disadvantage that a drawback that the air permeability of the original wet air permeability is lost is inevitably generated.

On the other hand, PTFE is formed by polymerizing tetrafluoroethylene (C ₂ F ₄ ), and does not react with oxygen because it is mainly composed of carbon atoms and fluorine atoms and does not contain hydrogen, and has heat resistance, low temperature resistance, Non-tackiness, low friction coefficient, and self-lubricating properties, and PTFE itself does not easily fuse with other materials, and other materials do not easily adhere to it.

Due to these properties, PTFE is applied in various fields. For example, PTFE-treated PTFE thin film is applied to fabric or nonwoven fabric by applying porosity to filter material or other application, for example, US Pat. No. 5,234,739; 6,084,472; 5,750,242 and in Taiwan Patent Publication Nos. 538164 and 592783.

Particularly, when porosity is imparted to the PTFE thin film and it is applied to clothes, excellent breathability, moisture permeability and water repellency are achieved, and it is attracting attention in the field of clothes requiring a breathable waterproof function.

Another method for providing a moisture permeable and waterproof function is a PTFE microporous membrane method using a biaxial stretching method. The duo-type PTFE membrane obtained by the biaxial stretching followed by the lamination improves the property of scratch resistance, washing resistance by layer separation, and water resistance of the PTFE single membrane.

However, when a top-treated layer is formed by using a hydrophilic non-porous polyurethane resin for reinforcement, the well-developed pore layer of PTFE is blocked and the advantages of PTFE pore can not be utilized, And the strength is weakened when an external force is applied to the portion.

Korean Patent Laid-Open Publication No. 2007-0068417 discloses a porous composite material formed by laminating an elastic sheet made of urethane and a PTFE porous sheet, but a moisture permeable bonding portion having pores is further laminated therebetween .

However, in the composite material described above, the total thickness is increased by the moisture-permeable bonding portion, the process is increased, and the moisture-permeable bonding portion has the isocyanate group as the substance having the reactor contained in the elastic sheet, Occurs.

As a result, the inventors of the present invention have found that a PTFE single membrane is partly embedded in one surface or both surfaces of a microporous polyurethane layer formed of a thermoplastic polyurethane composition by a wet lamination method, The present invention has been accomplished by providing a variety of applications for air-permeable and waterproof films which can be applied selectively to the clothes and the type of the fabric to be applied, while eliminating the problem that the adhesive is omitted while maintaining the interlayer pores and hardness at the time of curing.

It is an object of the present invention to provide a breathable, waterproof film of non-swelling pore type.

Another object of the present invention is to provide a method of manufacturing a swellable air-permeable waterproof film of a non-swellable pore type in which a PTFE single membrane is wet laminated in a thermoplastic polyurethane composition at the manufacturing step of a raw film to partially mold.

Another object of the present invention is to provide a waterproof and breathable waterproof outdoor fabric including a non-swellable pore type air permeable waterproof film, and a use thereof useful for medical protective fabrics which can be reused after high temperature sterilization and washing.

In order to achieve the above object, the present invention provides a microporous polyurethane foam comprising a microporous polyurethane layer formed of a thermoplastic polyurethane composition and a porous PTFE single membrane layer partially embedded on one or both surfaces of the microporous polyurethane layer formed with the polyurethane layer, Water-permeable film of a non-swelling pore type in which pores of the non-swelling pores are formed and integrated.

In the air-permeable waterproof film of the present invention, the pores have an average pore size of 0.1 to 10 mu m.

In the air-permeable waterproof film of the present invention, the microporous polyurethane layer 21 is a hydrophobic porous polyurethane.

In this case, it is preferable that the total thickness of the air-permeable and waterproof film is 100 μm or less. The air-permeable and waterproof film of the non-swellable pore type has a water resistance of 10,000 mmH ₂ O or more, a water vapor permeability of 30,000 g / And realizes a physical property of less than 10 m2 / ppa.

Accordingly, the present invention relates to a process for producing a water-swellable film of non-swellable pore type, comprising the steps of: preparing an emulsion-type thermoplastic polyurethane resin-

Separately, a process for producing a PTFE single membrane by biaxial stretching,

Wherein the emulsion-type polyurethane resin-containing composition is coated and dried, and a PTFE single membrane is wet-laminated in the process of forming the microporous polyurethane layer in the direction of movement of the polyurethane resin-containing composition so that the microporous polyurethane layer is porous Of the PTFE single membrane layer is recessed to form irregularly shaped pores and

And a step of winding the integral film by passing through the post-molding compression roller and drying it, thereby producing a swellable water-permeable, waterproof film.

It will be appreciated that the above manufacturing method can further carry out the release process of the release layer.

In the above depression molding process, it is preferable that the irregular-shaped pores are performed so as to have an average pore size of 0.1 to 10 μm.

Further, the present invention relates to a non-swellable air-permeable waterproof film for use therefor, which is selected from the group consisting of ski, golf wear, hiking, climbing, and jogging cloth, Waterproof and breathable waterproof outdoor fabric useful for any one selected from active sportswear or casual wear.

The fabric or the material of the knitted fabric may be polyester or polyamide synthetic fiber; Natural fibers including cotton, wool, silk; And intermarriage between them.

Further, the present invention relates to a waterproof, waterproof film which is swellable, and which is made of a polyester or polyamide system, and which is useful for surgical gowns or patient drapes, and which can be reused after high temperature sterilization, Provide creative fabrics.

The breathable film of the sweepable non-swellable type of the present invention has pores of a polyurethane layer formed by using a hydrophilic porous polyurethane, and a PTFE single membrane layer is formed on one or both surfaces of the polyurethane layer to form irregular pores So that the swelling phenomenon can be solved by integrating without any adhesive and controlling the pore size.

In addition, in the manufacturing method of the present invention, the PTFE single membrane layer is wet-laminated on the microporous polyurethane layer, and integrated by a compression roller to dry the PTFE single membrane layer, so that the PTFE single membrane layer is naturally recessed and formed on the polyurethane layer. It is possible to provide a variety of air-permeable and waterproof films that can be applied selectively according to the type of cloth or the fabric to be applied.

Accordingly, the present invention provides a non-swellable air-permeable film of non-swellable pore type, which is excellent in comfort, comfort, touch, scratch resistance, and particularly swell- Air permeable and waterproof film of the present invention to provide waterproof breathable and breathable waterproof outdoor fabrics and medical protective fabrics for breathable and breathable waterproof breathable laundry which is useful for surgical gowns or patient drapes can do.

1 is a surface image of a microporous polyurethane layer which is an embodiment of the present invention,
2 is a cross-sectional image of a breathable film of non-swellable pore type according to the present invention,
Fig. 3 shows a process drawing of the water-swellable film of the non-swellable pore type of the present invention,
Fig. 4 shows the result of evaluating the water resistance of the breathable and breathable waterproof fabric using the breathable film of the non-swellable pore type of the present invention.

Hereinafter, the present invention will be described in detail.

The present invention provides a microporous polyurethane layer formed of a thermoplastic polyurethane composition and a non-swellable porous air permeable film having a porous PTFE single membrane layer partially embedded on one or both sides of the polyurethane layer.

In the breathable waterproof film of the present invention, the PTFE single membrane layer is integrated with a laminated structure partially or partially embedded on a microporous polyurethane layer to form irregular pores.

In the air-permeable waterproof film (1) of the present invention, the microporous polyurethane layer is a hydrophobic hole type polyurethane.

Fig. 1 is a view showing the problem of the swelling phenomenon by the conventional hydrophilic non-porous type by using the polyurethane which forms the pores by the dry process as the surface image of the microporous polyurethane layer in the air permeable waterproof film of the present invention and the hydrophobic pore type It can be fundamentally resolved.

In addition to the pores of the microporous polyurethane layer 11, the PTFE single membrane layer 31 is partly recessed and formed by wet lamination, so that the pore size can be controlled while naturally irregularly shaped pores are formed.

The non-swellable pore type of the non-swellable pore type according to the present invention preferably has an average pore size of 0.1 to 10 mu m, more preferably an average pore size of 0.1 to 3 mu m.

Further, Fig through 2, as shown a cross-section of a non-breathable waterproof film of the water-swellable pore type according to the invention, Fig and the upper layer is microporous polyurethane layer 2, the thin intermediate layer PTFE single membrane layer and the bottom of the lower layer has The formation of the fibrous monolayer can be confirmed.

At this time, the air-permeable and waterproof film of non-swellable pore type has a total thickness of 100 μm or less, and in the embodiment of the present invention, the thickness is 35 to 50 μm.

The above water-swellable air-permeable film of the non-swellable pore type satisfies 1) a water resistance of 10,000 mmH ₂ O or more, and 2) a water vapor permeability of 30,000 g / m 2 day or more and a moisture resistance of 10 m 2 / do.

The present invention relates to a process for producing an air-permeable and waterproof film of a non-swellable pore type of the present invention, comprising a first step of preparing an emulsion-type thermoplastic polyurethane resin-containing composition on a release paper,

A second step of separately manufacturing a PTFE single membrane by a biaxial stretching method,

Wherein the emulsion-type polyurethane resin-containing composition is coated and dried, and a PTFE single membrane is wet-laminated in the process of forming the microporous polyurethane layer in the direction of movement of the polyurethane resin-containing composition so that the microporous polyurethane layer is porous Of the PTFE single membrane layer is recessed to form irregularly shaped pores; and

And a fourth step of winding the layer-integrated film by passing through the post-molding compression roller and drying the layer-integrated film, thereby producing a swellable air-permeable waterproof film.

Hereinafter, each manufacturing process will be described in detail.

In the method for producing a swellable, water-swellable film of the present invention, the first step is a step of forming a microporous polyurethane layer 21 by coating an emulsion type thermoplastic polyurethane resin-containing composition on a release paper 11 , The thermoplastic polyurethane composition of the present invention can be formed by a dry coagulation method or a wet coagulation method, and is a method for forming microvoids by dry or wet coagulation by dissolving polyurethane in a solvent. The diameter of the micropores thus formed (2 to 20 μm) is much smaller than the diameter of the water droplets (100 μm or more) and is much larger than the diameter of the water vapor molecules (0.0004 μm).

In addition, a polyurethane layer having pore characteristics can be formed using a composition containing a polyurethane resin based on an aromatic, one-component polyether having a viscosity of 20 Pa / 25 占 폚. At this time, depending on the drying temperature, the solvent and water are sequentially discharged according to the principle of the selective evaporation method, thereby forming micropores.

The drying method is a method in which a water-in-oil dispersion (w / o) emulsion type resin prepared by mixing a one-component or two-component polyurethane resin with a nonionic surfactant is mixed with a mixture of methyl ethyl ketone and toluene in a weight ratio of 1: The coating composition is prepared by adding a coating agent, a water repellent agent, a slip agent, a defoaming agent, a pigment, and water to a mixed solvent prepared by stirring the mixture for 20 to 24 hours to prepare a coating composition. And dried with a hot-air drier, the solvent and moisture are dried and removed to produce microporous pores. At this time, the polyurethane layer forms micropores having an average pore size of 1 to 10 mu m (Fig. 1).

In the method for producing a swellable, water-swellable film of the present invention, the second step is a step of separately preparing the PTFE single membrane layer 31, and a commercially available film may be used, or a known PTFE microporous membrane method may be used .

In the third step of the present invention, in the course of forming the microporous polyurethane layer 21 while the emulsion-type polyurethane resin-containing composition of the first step is dried after application, the second polyurethane resin- The PTFE single membrane is vertically wet-laid down through the supply member 30 so that the porous PTFE single membrane layer 31 is partially recessed and formed in the microporous polyurethane layer 21 to form naturally irregular pores (Fig. 2).

At this time, it is preferable that the irregular-shaped pores have an average pore size of 0.1 to 10 mu m, and more preferably, they can be controlled to have an average pore size of 0.1 to 3 mu m.

Thereafter, the fourth step is carried out through the cooling roller 60 while passing through the compression roller 40 after the molding of the third step, and the interlayer-integrated film is wound on the winding roller 70.

It is to be understood that, in the above manufacturing method, in the case of applying to the final product, the release process of the release layer 11 can be further performed.

Further, the present invention provides a breathable waterproof film of non-swellable pore type in which a PTFE single-membrane layer is naturally recessed and formed on a polyurethane layer, the adhesive is omitted while maintaining interlayer pores, thereby solving the problem of hardening during curing, Depending on the type of fabric, the enemy can be applied selectively.

Accordingly, the present invention is useful for any one selected from active sportswear or casual wear selected from the group consisting of ski, golf wear, hiking, climbing, and jogging suit to which a woven or knitted fabric is adhered to a swell- It provides waterproof, breathable and waterproof outdoor fabric.

The fabric or the material of the knitted fabric may be polyester or polyamide synthetic fiber; Natural fibers including cotton, wool, silk; And can be accomplished by intermarriage between them.

In addition, the moisture-permeable and breathable waterproof outer fabric can be applied to two-layer, two-layer or three-layer fabrics.

By using the air-permeable film of non-swellable pore type, it is possible to overcome disadvantages of the conventional swelling type moisture-permeable and waterproof functional film, as well as the comfort, comfort, touch and scratch resistance.

4 is a swelling type waterproof and waterproof fabric of Comparative Example 1 on the left side and a water permeable and waterproof fabric of Comparative Example 1 on the left side as a result of evaluating the water resistance of the breathable waterproof and breathable waterproof fabric using the breathable film of the sweepable non- Non-swellable pore type breathable waterproof and breathable waterproof fabric.

As a result, the conventional breathable and waterproof fabric swells and worsens upon contact with moisture, while the sweat of the fabric of the present invention is not observed, so that the breathable and waterproof function can be confirmed without swelling.

The air-permeable and waterproof film of the non-swellable pore type has 1) a water resistance of not less than 10,000 mmH ₂ O and 2) a water vapor permeability of not less than 30,000 g / m 2 dayday by the potassium acetate method and a moisture resistance resistance of not more than 10 m 2 / And the durability of washing is ensured in the case of a fabric in which a fabric or a knitted fabric is adhered to the air-permeable, waterproof film ( Tables 3 to 5 ).

Furthermore, the present invention relates to a breathable film of a non-swellable pore type, a polyester-based or polyamide-based fabric in which a tricot base material is adhered, a breathable waterproof breathable waterproof breathable laundry useful for a surgical gown or a patient drape, Provides a protective medical fabric for this.

Hereinafter, the present invention will be described in more detail with reference to Examples.

The present invention is intended to more specifically illustrate the present invention, and the scope of the present invention is not limited by these examples.

< Example  1> Ventilation waterproof  Production of film

1. Coating composition manufacturing process

A polyether-type polyurethane solution type resin dissolved in an aromatic one-component type methyl ethyl ketone having a solid content of 30% by weight was prepared and liquid was prepared by the following formulation to prepare a coating solution.

100 parts by weight of resin

MEK / TOL 31 parts by weight

Non-yellowing crosslinking agent 2 parts by weight

Water repellent agent 2 parts by weight

Slip second part by weight

Water / MEK (40/4) 44 parts by weight

A polyurethane layer having pore characteristics is formed using a composition containing a polyurethane resin based on an aromatic and one component polyether having a viscosity of 20 Pa / 25 占 폚, wherein selective evaporation of the solvent and water according to the drying temperature It is discharged sequentially according to the principle of law, and microporous is formed by this. (W / o) emulsion type resin prepared by mixing the one-pack type polyurethane resin and the nonionic surfactant was added to a mixed solvent of methyl ethyl ketone and toluene mixed at a weight ratio of 1: 1, and an anti-film agent, Pigment and water were added and stirred, and the mixture was allowed to stand for 20 to 24 hours. Then, a crosslinking agent was added to the mixed solution to prepare a coating composition.

2. Manufacturing process of microporous polyurethane layer

The coating composition of the first process is uniformly applied to the release paper 11 provided by the release paper feeder 10 with a comma knife through a coating liquid supply member 20 and then coated and dried by a hot air dryer to remove the solvent and moisture And dried to produce microporous pores. At this time, a microporous polyurethane layer 21 having an average pore size of 0.1 to 5 mu m was formed.

3. Manufacturing process of air-permeable waterproof film

A separately manufactured PTFE single membrane 31 is vertically fed through a feed member 30 onto a microporous polyurethane layer 21 formed on one side of a release paper 11 provided in the release paper feeder 10, And passed through a compression roller 40 to be aligned with the microporous polyurethane layer 21 and then passed through a chamber 50 extending for 20 m to be dried through a cooling roller 60. After the film is formed on the releasing paper 11 in the above manner, the paper is aged at 60 to 70, and then the air-permeable and waterproof film is wound in a roll form through the winding roller 70. The release paper 11 is peeled Respectively. Thus, a breathable waterproof film (1) having a structure in which the PTFE single membrane layer (31) was integrated on the microporous polyurethane layer (21) was produced. At this time, the total thickness of the air permeable waterproof film was 50 탆.

< Example  2> Waterproof and waterproof Ventilation waterproof  Fabrication of fabrics

A nylon 186 tslanite fabric having a weight of 99 g / m 2 was separately prepared as a face fabric on the moisture permeable waterproof and breathable waterproof functional coating fabric for the outdoor, and the CP152 roll in the gravure roll was applied to the breathable waterproof film prepared in Example 1 And then laminated through a dot hot melt lamination machine to produce a two layer structure breathable and breathable waterproof fabric.

< Example  3> Waterproof and waterproof Ventilation waterproof  Fabrication of fabrics

A two-layer moisture permeable waterproof and breathable waterproof fabric was produced in the same manner as in Example 2, except that CP roll was changed to CP roll instead of the dot roll used in Example 2 above.

< Example  4 ~ 6> Waterproof and waterproof Ventilation waterproof  Fabrication of fabrics

A two-layered breathable and breathable waterproof fabric was produced in the same manner as in Example 2 except that the tape rolls used in Example 2 were changed to T PYRAMID, NEWDIA, and NET, respectively, .

< Example  7> Waterproof and waterproof Ventilation waterproof  Fabrication of fabrics

A PP micro twill weight of 154 g / m 2 as a face fabric on the moisture permeable waterproof and breathable waterproof functional coating fabric for the outdoor was separately prepared, and the film prepared in Example 1 was applied to a waterproof waterproof film using CP152 Rolled, and then laminated through a dot hot melt lamination machine to produce a two-layer moisture permeable and breathable waterproof fabric.

< Example  8> Waterproof and waterproof Ventilation waterproof  Fabrication of fabrics

A nylon 75D plain spun weighing 160 g / m 2 was separately prepared as a face fabric on the breathable waterproof and breathable waterproof functional coating for outdoor use. The film prepared in Example 1 was applied to a breathable waterproof film using CP152 Rolled, and then laminated through a dot hot melt lamination machine to produce a two-layer moisture permeable and breathable waterproof fabric.

< Comparative Example  1>

In the evaluation of physical properties, a swelling type breathable waterproof fabric (GORE-TEX® Paclite Shell) having a hydrophilic non-porous polyurethane layer laminated on a porous PTFE single membrane was used.

< Experimental Example  1> Ventilation waterproof  Evaluation of moisture permeability and water resistance of film and fabric using it

The breathable and waterproof film prepared in Example 1 was used as a membrane and adhered to the skin fabric shown in Examples 2 to 6 using a conventional moisture hardening type hot melt adhesive to prepare moisture permeable and waterproof fabrics . Thereafter, using the test conditions shown in Table 1 and the gravure rollers shown in Table 2 , hot melt lamination was performed.

The non-swellable air-permeable water-repellent film of the non-swellable pore type prepared in Example 1 and the water vapor permeability and the water resistance of the breathable and breathable waterproof fabric prepared in Examples 2 to 6, ) Were measured and are shown in Table 3 below.

From the results shown in the above Table 3, the water-swellable air-impermeable film of the non-swellable pore type produced in Example 1 satisfied the physical properties of a water vapor permeability of 30,000 g / m 2 ㆍ day or more by the potassium acetate method. In the case of the moisture- , And the water resistance and water resistance were 10,000 mmH ₂ O or more, and it was confirmed that the waterproof fabric of high performance having no swelling property could be obtained.

< Experimental Example  2> Ventilation waterproof  Evaluation of Peel Strength of Film and Fabric Using It

The peel strengths of the air-permeable and waterproof films of the non-swellable pore type prepared in Example 1 and the moisture permeable and waterproof fabrics prepared in Examples 2 to 6 using the same were measured and reported in Table 4 below.

From the results shown in Table 4, the air-permeable and waterproof film of the non-swellable pore type manufactured in Example 1 and the breathable and waterproof and breathable waterproof fabric prepared in Examples 2 to 6 using the same exhibited sufficient peeling strength applicable for outdoor use Respectively.

< Experimental Example  3> Waterproof and waterproof Ventilation waterproof  Evaluation of moisture permeability and water resistance of material

The moisture permeability and water resistance of the moisture permeable and waterproof fabrics prepared in Examples 2, 7 and 8 were measured and are shown in Table 5 below.

From the results shown in the above Table 5, in the case of the breathable waterproof and breathable waterproof fabrics manufactured by the skin fabrics, the water resistance performance of all the fabrics was 10,000 mmH ₂ O or more, and the water vapor permeability was slightly different depending on the fabric type and the tissue density difference Respectively.

As a result of measurement of the moisture resistance according to the skin model method most recently required by buyers of developed countries such as Europe, the breathable and breathable waterproof fabric of the present invention has a moisture resistance resistance of 10 M &lt; 2 &gt;. Pa / w.

As described above, the present invention relates to a method for manufacturing a moisture permeable and waterproof functional film of a conventional swelling type while maintaining interlayer pores by partially dipping a PTFE single membrane into a microporous polyurethane layer formed of a hydrophobic porous polyurethane, Water-permeable film of the swellable non-swellable type of the present invention which can overcome the disadvantages.

In addition, the film of the present invention is formed by integrating a polyurethane layer and a bulky PTFE single membrane layer of a moisture-permeable and waterproof fabric material by wet lamination, thereby providing physical strength, scratch resistance and water resistance Performance can be supplemented.

Thus, the breathable and waterproof and breathable waterproof fabric using the characteristics of the air-permeable and waterproof film of the swellable non-swellable type of the present invention has provided useful applications as outdoor protective and medical protective fabrics.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

1: Non-swellable air-permeable waterproof film of pore type
11: release paper
21: Microporous polyurethane layer
31: PTFE single membrane layer
10: Release paper feed roller
20: polyurethane coating liquid supply member
30: PTFE single membrane supply member
40: Compression roller
50: chamber,
60: cooling roller
70: winding roller

Claims (9)

A microporous polyurethane layer formed from a thermoplastic polyurethane composition and
A porous polytetrafluoroethylene single membrane layer is partially embedded in one side or both sides of the polyurethane layer to form an integrated film,
Wherein the irregularly shaped pores formed by partially sinking have an average pore size of 0.1 to 10 mu m. delete The air-permeable waterproof film according to claim 1, wherein the microporous polyurethane layer is a hydrophobic porous polyurethane. The airtight waterproof film according to claim 1,
FIG mmH ₂ O or more domestic 10,000, acetic moisture permeability 30,000g / ㎡ and over day by the method of potassium and moisture permeation resistance breathable water-resistant film of the non-water-swelling pore type, characterized in that the implementation of the physical properties of less than 10㎡.pa / w. The air-permeable waterproof film according to claim 1, wherein the total thickness of the air permeable waterproof film is 100 탆 or less. The emulsion-type thermoplastic polyurethane resin-containing composition is coated on the mold release paper, dried and dried to form a microporous polyurethane layer,
In the process of forming the microporous polyurethane layer, a polytetrafluoroethylene single membrane separately prepared by a biaxial stretching method in the direction of the polyurethane resin-containing composition is vertically wet-laminated through a supply member, A porous polytetrafluoroethylene single membrane layer is formed by impregnation into a porous polyurethane layer to form irregularly shaped pores,
And a step of winding the film after passing through the shaping roller while passing through the shaping roller to wind up a film integrated with the interlayer. 7. The method of claim 6, wherein the irregularly shaped pores have an average pore size of 0.1 to 10 mu m. A breathable waterproof film according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, Wherein the fabric is made from active sports wear or casual wear selected from the group consisting of ski, golf wear, hiking, climbing, and jogging, to which a fabric or a knitted fabric made of natural or synthetic fibers is adhered. A breathable waterproof film and a breathable waterproofing and breathing material useful for a surgical gown or a patient drape by a polyester-based or polyamide-based tricot base material are laminated on the breathable and waterproof film of any one of claims 1 and 3 to 5 Protective fabric for medical use that can be reused after waterproof sterilization and washing.

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