KR20030085279A - A moist peameable and water proof fabric with laminating type - Google Patents

Abstract

PURPOSE: A laminating type water vapor permeable and water proofing fabric on both sides of which fiber substrate is positioned to prevent that sewing is complicated by use of a separate lining, and a laminating type water vapor permeable and water proofing fabric having superior water pressure resistance, water vapor permeability and peel strength are provided. CONSTITUTION: The laminating type water vapor permeable and water proofing fabric comprises a coating base sheet(1) in which polyurethane resin coating layer(1b) is formed at one side of fiber substrate(1a); a hot melt adhesive layer(3) formed on the polyurethane resin coating layer(1b); and a fiber substrate(2) laminated to the hot melt adhesive layer(3) so that the laminating type water vapor permeable and water proofing fabric has water pressure resistance 1,000 mmH2O or more, water vapor permeability of 3,000 g/m¬2·24 hours or more and peel strength of 300 g/cm or more, wherein the coating base sheet(1) is coated with dry type hydrophilic non-porous, dry type porous or wet type porous polyurethane resin, wherein the fiber substrate(1a) composing the coating base sheet(1) is a polyester base sheet or polyamide base sheet, wherein the fiber substrate(2) laminated to the hot melt adhesive layer(3) is polyamide fabric, polyamide knitting, polyamide non-woven fabric, polyester fabric, polyester knitting or polyester non-woven fabric, wherein a surface coating layer having a principal constituent of aqueous polyurethane resin is formed on the polyurethane resin coating layer(1b), and wherein the hot melt adhesive layer(3) is formed of reactive polyurethane resin.

Description

Laminating Type Breathable Tarpaulin {A moist peameable and water proof fabric with laminating type}

The present invention relates to a laminated moisture-permeable waterproof foam having excellent water pressure, moisture permeability, and peel strength, and at the same time, a simple sewing process during manufacture. Moisture-proof waterproof fabric is used as a fabric for clothing worn during intense exercise under relatively harsh weather conditions, such as sportswear, mountaineering clothes and skiwear.

Therefore, the moisture-permeable waterproof fabric not only blocks raindrops during rainfall, but also maintains the body temperature in clothes in low temperature environments, and maintains the temperature in clothes by releasing sweat emitted from the body in high temperature environments following intense exercise. The function of high water pressure and high moisture permeability which can express a comfortable wearing feeling is calculated | required.

As a conventional technique for manufacturing such a moisture-permeable waterproof foam (i) a resin composition prepared by mixing polyurethane and dimethylformamide, an organic solvent, is coated on the fabric to a certain thickness, and then passed through the water to make a fine fabric on the fabric. A wet method for forming a polyurethane coating layer having pores, and (ii) a resin composition prepared by dissolving polyurethane in a highly volatile organic solvent such as methyl ethyl ketone, toluene, acetone, isopropyl alcohol, etc. There is a dry method of forming a homogeneous polyurethane film layer on the fabric by volatilizing the volatile organic solvent by heat treatment after coating.

The wet method and the dry method are methods of coating a polyurethane resin composition directly on a fabric.

As another conventional technique, a method of manufacturing a laminated moisture-permeable waterproof foam is also applied by a laminating method in which a functional film is separately prepared and then laminated with a fabric using a hot melt adhesive.

Looking at a specific example, first, a resin composition prepared by dissolving a polyurethane in a highly volatile organic solvent such as methyl ethyl ketone, toluene, acetone, isopropyl alcohol, etc. on a smooth sheet (paper, film, fabric, etc.) After coating with heat treatment to volatilize the volatile organic solvent to prepare a polyurethane film having moisture-permeable waterproof.

Next, the hot melt adhesive component is uniformly coated with a knife or uniformly coated with gravure, and then laminated with a fabric and matured to produce a laminated moisture-permeable waterproof foam.

However, the moisture-permeable waterproof fabric manufactured by the above-mentioned conventional methods is used for clothing because a fiber base such as fabric is laminated only on one side (surface when used) of the polyurethane film layer, or a polyurethane coating layer is formed only on one side of the fiber base. When used as a separate lining had to be used, due to this there was a problem that the sewing process is complicated.

In addition, the laminated moisture-permeable waterproof fabric prepared by the conventional method has a weak adhesive force (peel strength) between the hot melt adhesive and the fiber base, causing a problem that the laminated film layer is deformed or peeled off during washing.

An object of the present invention is to manufacture a laminated moisture-permeable waterproof bubble is easy to sew, do not have to use a separate lining to solve the conventional problems, excellent water pressure and moisture permeability and also excellent peel strength.

The present invention is to provide a laminated moisture-permeable waterproof cloth in which the fiber base is located on both sides in order to prevent the sewing is complicated by the use of a separate lining. In another aspect, the present invention is to provide a laminated moisture-permeable waterproof bubble excellent in water pressure, moisture permeability and peel strength.

1 is a schematic diagram showing a cross-sectional state of the present invention laminating moisture-permeable waterproof cloth.

Figure 2 is a process schematic diagram of manufacturing the present invention laminating moisture-permeable tarpaulin

※ Explanation of Codes on Major Parts of Drawings

1: coating fabric coated with polyurethane resin 1a: fiber base material in coating fabric (1)

1b: polyurethane resin coating layer in the coating fabric (1) 2: laminating fiber substrate

3: hot melt adhesive layer 4: heatable chamber type doctor blade

5: Heatable Gravure Roll 6: Infrared Heater 7: Hoppo Roll

8: Chamber 9: Counter Roll

Laminated type moisture-permeable waterproof foam of the present invention for achieving the above problems, the coating material (1) formed with a polyurethane resin coating layer (1b) on one side of the fiber base (1a), hot melt adhesive formed on the polyurethane coating layer (1b) It consists of the fiber base material 2 laminated to the layer 3 and the said hot melt adhesive layer 3, and has water resistance of 1,000 mmH ₂ O or more, moisture permeability of 3,000 g / m 2 · 24 hours or more and peeling strength of 300 g / cm or more It features.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

First, the laminated moisture-permeable tarpaulin of the present invention is a coating fabric (1), [ii] the poly of the coating fabric (1), the polyurethane resin coating layer (1b) is formed on the fiber base (1a) as shown in FIG. It consists of the hot melt adhesive layer 3 formed on the urethane resin coating layer 1b, and the fibrous base material 2 laminated on the hot melt adhesive layer 3.

More specifically, the laminating fiber base 2 on the polyurethane resin coating layer (1b) of the coating fabric (1) has a structure laminated by the hot melt adhesive layer (3).

As described above, the laminated moisture-permeable waterproof foam of the present invention does not need to use a separate lining because the fiber bases 1a and 2 are positioned on both the surface and the back side, so that the sewing process is simplified, and the surface and the back side are selectively used. Fashion is also excellent.

The fiber substrate 1a constituting the coating fabric 1 may be polyester fabric or polyamide fabric, and the laminated fiber substrate 2 may be polyamide fabric, polyamide knit fabric, polyamide nonwoven fabric or polyester fabric. , Polyester knitted fabric, polyester nonwoven fabric, etc. can be used.

The coating fabric 1 is a fabric coated with a dry hydrophilic non-porous, dry porous or wet porous polyurethane resin.

On the other hand, in the laminated moisture-permeable waterproof foam of the present invention, a surface coating layer composed mainly of an aqueous polyurethane resin may be selectively formed between the polyurethane resin coating layer 1b and the laminated fiber base 2.

The hot melt adhesive layer 3 is preferably composed of a reactive polyurethane resin. Specifically, it is prepared by reacting a polyol containing a hydroxyl end group and a compound containing an isocyanate group at the sock end, and the basic structure of the final product by reacting the isocyanate component in excess compared to the polyol component. It is preferable to use a reactive polyurethane hot melt having an isocyanate group at the sock end.

When the reactive polyurethane hot melt is applied to a laminating process, the isocyanate at the end of the sock is reacted with a small amount of moisture contained in the fabric, the functional film, and the air to change into a thermosetting material, thereby exhibiting strong adhesion. As the polyol component and the isocyanate component used in producing the reactive polyurethane hot melt, those used in ordinary polyurethane synthesis can be used.

Next, an example of a method of manufacturing the laminated moisture-permeable waterproof foam will be described.

First, the polyurethane resin is directly applied onto the fiber base 1a by a floating knife or knife over roll method, and then the polyurethane resin coating layer 1b is applied by a conventional dry or wet process. To form a coating fabric (1). At this time, the coating thickness is preferably 10 ~ 50㎛.

Next, hot melt adhesive (reactive polyurethane resin, etc.) is applied onto the polyurethane resin coating layer 1b of the coating fabric 1 using a laminating device as shown in FIG. 2 and then applied before the hot melt adhesive is completely hardened. Laminating fiber base (2) is laminated and wound on the prepared hot melt adhesive to produce a laminating moisture-permeable waterproof fabric.

The specific working process is as follows.

The hot melt adhesive is melted in a heatable hopper and then transferred through a heatable tube to a chamber-type doctor blade with a heater. Supply the appropriate amount of reactive hot melt adhesive on the gravure roll with a certain pattern engraved from the chamber type doctor blade, fill the hot melt adhesive with the inside of the engraved pattern, and apply it to the polyurethane resin coating layer (1b) of the coating fabric (1). ) Onto the image.

The amount of transferred hot melt adhesive is preferably 5 to 50 g / m 2. Too large a transfer amount deteriorates the touch, and too little transfers poor adhesion. In addition, in order to transfer and apply a molten hot melt adhesive to a fabric, both the transfer apparatus and the coating apparatus must be heatable and must be completely sealed so as not to be exposed to air in the middle.

Next, after laminating the laminated fabric (2) on the transferred hot melt adhesive, it is laminated and wound on the happo roll (7) to produce a laminated moisture-permeable waterproof foam.

In the present invention, the water vapor transmission rate, the water pressure resistance and the adhesive force measuring method are as follows.

Moisture permeability

Measured by ASTM E 96 method.

Water pressure

Measured by the ISO 811 method.

· Peeling strength

It is measured by ASTM D 751 method.

Laundry experiment

It is measured by AATCC 135-1995 (five washes) method.

·Exterior

It is evaluated by sensuality by ten experts. If 7 or more were judged to be excellent, they were classified as good.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited only to the following examples.

Example 1

The polyurethane resin composition of Composition 1 was coated on a polyamide fabric with a floating knife 60 g / m 2 and then coated once in a manner of drying at 150 ° C. for 1 minute to form a polyurethane resin coating layer 1b.

Composition 1

① Water-based polyurethane resin: 100 parts by weight

② Water: 20 parts by weight

③ aqueous isocyanate crosslinking agent: 7 parts by weight

④ 4 parts by weight of aqueous melanin crosslinking agent

The coating resin composition for surface treatment prepared as Composition 2 on the polyurethane resin coating layer 1b was coated with a floating knife 40g / m 2, and then dried at 150 ° C. for 1 minute to form a surface coating layer, thereby coating the coating fabric 1. Manufacture.

Composition 2

① Aqueous network structure polyurethane resin for surface treatment: 100 parts by weight

② Water: 10 parts by weight ③ Aqueous silicone: 0.5 parts by weight

The laminated knitted fabric 2 is laminated with a hot melt adhesive on the surface coating layer of the coating fabric prepared by the above method to produce a laminated moisture-permeable waterproof fabric. The results of evaluating the physical properties of the moisture-permeable waterproof fabric thus prepared are shown in Table 1.

Example 2

The polyamide fabric is coated with a polyurethane resin composition of composition 3 to a thickness of 40 μm using a comma knife, and then dried in multiple stages to form a polyurethane resin coating layer 1b to prepare a coating fabric 1.

Composition 3

① W / O emulsion type polyurethane resin: 60 parts by weight

② Methyl ethyl ketone / toluene (13/18): 20 parts by weight

③ hexamethylene diisocyanate crosslinking agent: 1 part by weight

④ Fluorocarbon-based water repellent: 1 part by weight

⑤ Silicone oil-based touch improver: 1 part by weight

⑥ Water: 40 parts by weight

The laminated knitted fabric 2 is laminated with a hot melt adhesive on the upper surface of the polyurethane resin coating layer 1b of the coating fabric 1 prepared by the above method to produce a laminated moisture-permeable waterproof fabric. The results of evaluating the physical properties of the moisture-permeable waterproof fabric thus prepared are shown in Table 1.

Example 3

Except for changing the composition of the polyurethane resin coating layer (1b) as shown in the following composition 4, and the composition of the surface coating layer as shown in the composition 5 below to manufacture a laminated moisture-permeable waterproof foam in the same process and conditions as in Example 1.

Composition 4

① Water-based polyurethane resin: 90 parts by weight

② isocyanate curing agent: 7 parts by weight

③ Curing accelerator: 2 parts by weight

④ Methyl ethyl ketone: 20 parts by weight

Composition 5

① Aqueous network structure polyurethane resin for surface treatment: 90 parts by weight

② Methyl ethyl ketone: 10 parts by weight ③ Dimethyl formamide: 5 parts by weight

The results of evaluating the physical properties of the moisture-permeable waterproof fabric thus prepared are shown in Table 1.

Example 4

Except for changing the fiber substrate laminated on the upper surface of the polyurethane resin coating layer (1b) to a polyester fabric, a laminated moisture-permeable waterproof fabric is prepared in the same process and conditions as in Example 3. The results of evaluating the physical properties of the moisture-permeable waterproof fabric thus prepared are shown in Table 1.

Example 5

Except for changing the fiber base laminated on the polyurethane resin coating layer (1b) to a polyester non-woven fabric, a laminated moisture-permeable waterproof fabric is prepared in the same process and conditions as in Example 3. The results of evaluating the physical properties of the moisture-permeable waterproof fabric thus prepared are shown in Table 1.

Example 6

Except for changing the fiber base laminated on the polyurethane resin coating layer (1b) to the polyester knitted fabric, a laminated moisture-permeable waterproof fabric is prepared in the same process and conditions as in Example 3. The results of evaluating the physical properties of the moisture-permeable waterproof fabric thus prepared are shown in Table 1.

Comparative Example 1

Laminating moisture-proof waterproof fabric is prepared by laminating a polyester fabric with a hot melt adhesive on the upper and lower surfaces of a 15 μm-thick polyurethane film having a moisture-permeable waterproof function. The results of evaluating the physical properties of the moisture-permeable waterproof fabric thus prepared are shown in Table 1.

Comparative Example 2

A 15 μm thick polyurethane film having a moisture-permeable waterproof function is laminated with a polyester fabric on the upper surface and a polyester knit on the lower surface with a hot melt adhesive to prepare a laminated moisture-permeable waterproof fabric. The results of evaluating the physical properties of the moisture-permeable waterproof fabric thus prepared are shown in Table 1.

Laminating Type Moisture Proof Waterproof Material division Water pressure (mmH ₂ O) Moisture permeability (g / ㎡, 24 hours) Peel Strength (g / cm) Exterior Example 1 Before washing 8,000 7,500 450 Good After washing 8,000 8,000 500 Good Example 2 Before washing 4,000 7,300 550 Good After washing 4,000 7,400 550 Good Example 3 Before washing 8,300 7,500 1,000 Good After washing 8,300 8,400 800 Good Example 4 Before washing 8,000 7,000 1,100 Good After washing 8,000 7,000 950 Good Example 5 Before washing 8,400 8,000 700 Good After washing 8,400 8,300 650 Good Example 6 Before washing 8,000 8,000 500 Good After washing 8,000 8,000 480 Good Comparative Example 1 Before washing 6,000 4,600 150 Good After washing 4,000 5,500 100 Filthy Comparative Example 2 Before washing 5,000 7,000 200 Good After washing 3,000 7,600 100 Bad

In the present invention, since the fiber base is located on both sides, there is no need to use a separate lining, so the sewing process is simple, and both sides can be alternately used on the back side, and the fashion function is also excellent. In addition, the present invention is excellent in water pressure, moisture permeability, and peel strength (washing fastness).

Claims (6)

A coating fabric 1 having a polyurethane resin coating layer 1b formed on one side of a fiber base 1a, a hot melt adhesive layer 3 formed on the polyurethane coating layer 1b, and a laminate on the hot melt adhesive layer 3 Laminating type moisture-permeable waterproof foam comprising a fiber base (2) having a water resistance of at least 1,000 mmH ₂ O, a moisture permeability of 3,000 g / ㎡ · 24 hours or more and a peel strength of 300 g / cm or more. The laminated moisture-permeable waterproof foam according to claim 1, wherein the coating fabric (1) is coated with a dry hydrophilic non-porous, dry porous or wet porous polyurethane resin. The laminated moisture-permeable waterproof fabric according to claim 1, wherein the fiber base (1a) constituting the coating fabric (1) is a polyester fabric or a polyamide fabric. Laminating type according to claim 1, characterized in that the fiber base 2 laminated to the hot melt adhesive layer 3 is a polyamide fabric, a polyamide knit fabric, a polyamide nonwoven fabric, a polyester fabric, a polyester knit fabric or a polyester nonwoven fabric. Breathable Tarpaulin. The laminated moisture-permeable waterproof foam according to claim 1, wherein a surface coating layer containing a water-based polyurethane resin as a main component is formed on the polyurethane resin coating layer (1b). The laminated moisture-permeable waterproof foam according to claim 1, wherein the hot melt adhesive layer (3) is made of a reactive polyurethane resin.