JP2000272073A - Waterproof fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight waterproof fabric having a flexible feeling and excellent in hydrolysis resistance, surface strength and tear/tensile strength. SOLUTION: A first layer comprising a reaction type polyurethane resin having a polyether bond compounded with a crosslinking agent is formed on at least the single surface of a long fiber fabric and a second layer comprising a one-pack type polyturethane resin having a polyether bond is subsequently formed on the first layer in an amt. of 220 g/m2 or less. Further, the long fiber fabric is pretreated with a fluorine type water repelling agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commercial apron, and more particularly to a waterproof cloth suitable for an apron and a salopette related to the fishing industry, the fishery processing industry and the food industry.

[0002]

2. Description of the Related Art As a waterproof cloth using a cross-linking agent, a cast technique in which a polyurethane layer is formed on the upper surface of a release paper, and then a two-pack urethane adhesive containing a cross-linking agent is applied and a base cloth is adhered. It has been known. As a waterproof cloth having good hydrolysis resistance, a cloth in which a vinyl chloride resin is coated on a base cloth is widely used.

[0003]

In the case of a waterproof cloth in which a urethane resin is laminated by a casting technique, if a long fiber woven fabric having a small anchor effect due to fluff or the like on the surface is used as a base fabric, a large amount of the fabric is required to increase the peeling strength. Has to be applied, so that the adhesive penetrates into the fiber structure of the long-fiber woven fabric and hardens the hand. If a long-fiber woven fabric is treated with a fluorine-based water-repellent agent in advance to prevent the penetration of the adhesive, the texture is soft, but the adhesive does not conform to the fiber surface and the peel strength is so low that it cannot withstand practical use. Also,
In the case of a waterproof cloth made of a vinyl chloride resin having good hydrolysis resistance, there is a drawback that it is heavy, and in addition, it becomes soft and the resin strength is reduced in summer, and it is broken by friction and the like in summer. Was. In view of the above problems, an object of the present invention is to provide a waterproof cloth which is lightweight, has a soft texture, is excellent in hydrolysis resistance, and is excellent in surface strength, tearing and tensile strength.

[0004]

As a result of intensive studies by the present inventors, the object of the present invention has been industrially advantageously achieved by the present invention having the following constitution. [1] A first layer made of a reactive polyurethane resin having a polyether bond containing a crosslinking agent is formed on at least one surface of the long fiber fabric, and then a second layer made of a one-pack type polyurethane resin having a polyether bond is formed. A waterproof fabric comprising a layer and having a weight of 220 g / m ² or less.

[2] The waterproof cloth according to the above [1], wherein the crosslinking agent of the first layer is a melamine-based crosslinking agent.

[3] The above-mentioned [1] or [2], wherein the reactive polyurethane resin of the first layer has three or more functional groups in one molecule capable of reacting with a crosslinking agent.
The waterproof cloth according to the above.

[4] The above-mentioned [1] to [1], wherein the long fiber woven fabric has been previously treated with a fluorine-based water repellent.
The waterproof cloth according to any one of [3].

[5] A commercial apron sewn with the waterproof cloth according to any one of [1] to [4].

The most important feature of the present invention is that a one-component polyurethane resin layer having a specific composition is formed as a first layer and a one-component polyurethane resin layer having a specific composition is formed as a first layer on a long-fiber fabric. Is to provide a waterproof cloth which is flexible, has excellent hydrolysis resistance, and is excellent in surface strength, tearing and tensile strength.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The long fiber woven fabric used in the present invention includes a woven fabric made of long fibers such as nylon, polyester, vinylon and aramid. Nylon and polyester fabrics are preferred. Total denier of long fiber is 70 ~
420 denier is preferred. Particularly, 100 to 250 denier is preferable. If it is less than 70 denier, the tear strength may be insufficient. If it is greater than 420 denier, the lightness is insufficient. The weight of the fabric is 220 g / m ²
It is necessary to be less than or equal to 120 g / m ² . Further, in order to improve the waterproof property, the long-fiber woven fabric can be treated with a fluorine-based water repellent beforehand and used as a base fabric. The reactive polyurethane resin of the first layer described below is mixed with a solvent having good permeability and is well compatible with the fiber surface of the long-fiber woven fabric treated with a fluorine-based water-repellent agent. Never.

The reactive polyurethane resin having a polyether bond in the first layer used in the present invention refers to a reactive polyurethane resin in which a polyether type is incorporated in an amount of at least 30%, preferably at least 50% by weight of a polyol. is there. The reactive polyurethane resin preferably has a molecular weight in the range of 30,000 to 200,000. In addition, since it becomes a network polymer after the reaction with the crosslinking agent and the hydrolysis resistance is further improved, the crosslinking agent is contained in one molecule. 3 functional groups that can react with
One or more, especially 5 or more are preferable.

As the crosslinking agent, melamine-based, isocyanate-based, blocked isocyanate-based, imine-based, and oxadrine-based are used, and melamine-based is preferred.
Melamine-based and other crosslinking agents can be used in combination, and the hydrolysis resistance may be further improved. When a melamine-based compound is used, the reaction is completed by the heat treatment, and the toxicity is weak and the workability is good.

In the one-pack type polyurethane having an ether bond formed as the second layer, the polyether type is at least 30% by weight, preferably at least 50% by weight of the polyol.
% Is desirably incorporated. Other polyols are not limited to the first layer and the second layer. As a method of forming the resin of the first layer and the second layer, an ordinary coating method can be adopted. A two-head coater capable of forming the first layer and the second layer in one behavior is desirable. The opposite surface on which the first layer and the second layer are formed may be further coated with a polyether-based polyurethane resin.

In the first and second layers, a pigment, a filler,
Silicon-based modifiers, antifungal / antibacterial agents and other additives can be mixed freely. 220 g / m after coating
^In order to reduce the amount to ² or less, it is preferable that the amount of resin adhered is 100 g / m ² or less.

The waterproof cloth obtained according to the present invention has a soft hand when measured, has excellent hydrolysis resistance, and has excellent surface strength, tearing and tensile strength. By sewing on a commercial apron or the like, a suitable product that is light and has good workability and does not leak water can be obtained.

[0016]

Next, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the examples. In addition, the abbreviations of the chemicals used in each example are collectively described at the end of this example.

Example 1 A nylon / oxhord base cloth of length / width 210D was refined, putted with a 2% aqueous solution of a fluorine-based water repellent AG710, and dried. Next, the first layer and the second layer of the present invention were formed as follows.

(1) Synthesis of reactive urethane resin for the first layer PTMG-2000 13 mol IPDI 14.5 mol AAE 1 mol d-EA 0.5 mol IPA 115 mol Toluene 95 mol Ethyl cellosolve 45 mol 8 hours in nitrogen stream, temperature 130 ℃ → 40
C. The polymer having a molecular weight of 70 having 14 functional groups capable of reacting with a crosslinking agent in one molecule having a viscosity of 30,000 CPS / 30 ° C.
000 reactive urethane resins were obtained.

(2) Formation of the first layer 100 parts by weight of the urethane prepolymer 5 parts by weight of J-820 0.5 parts by weight of PTSA (20%) 17 parts by weight of white pigment 30 parts by weight of MEK Resin mixed by the above-mentioned composition Was coated at a coating amount of 140 g / m ² and dried.

(3) Formation of the second layer MP-185 100 parts by weight Matting agent 2 parts by weight Resident 776 2 parts by weight Catalyst 2 parts by weight MEK 60 parts by weight The amount of the resin mixed in the above composition is applied at 50 g / m ^2. And then dried and then treated at 160 ° C. for 3 minutes. Table 1 shows the properties of the waterproof cloth thus obtained.

Example 2 Example 2 was carried out in the same manner as in Example 1 except that the fluorine-based water-repellent treatment was not applied to 210D nylon oxhode. Table 1 shows the properties of the obtained waterproof cloth.

Example 3 After the same operation as in Example 1, the back surface was coated as follows. Backside first layer: 50 g / m2 of the compounded resin of the first layer of Example 1
Coated with ² and dried. Backside second layer: LQ-540 100 parts by weight Matting agent 3 parts by weight Silicon 2 parts by weight Xylene 40 parts by weight MEK 30 parts by weight The resin mixed in this composition is applied to the backside first layer at an application amount of 20 g / m ^2. After coating and drying, 160 ℃ x
Heat treated for 3 minutes. Table 1 shows the properties of the obtained waterproof cloth.

Comparative Example 1 The resin blended in the second layer of Example 1 was coated on a semi-gloss release paper at an application amount of 50 g / m ² and dried. A two-pack type polyether-based polyurethane adhesive having the following composition was coated thereon at a coating amount of 250 g / m ² and dried. Then, a fluorine-based water-repellent treated 210D nylon oxhode base cloth is bonded and pressure-bonded with a nip roll.
Aged at 48 ° C for 48 hours. The composition of the adhesive is as follows. TA-265 100 parts by weight DMF 30 parts by weight Coronate L 12 parts by weight Axel HM 3 parts by weight MEK 10 parts by weight

Comparative Example 2 The same operation as in Comparative Example 1 was carried out except that a 210D nylon oxhode base fabric not subjected to a fluorine-based water-repellent treatment was used. Table 1 shows the properties of the obtained waterproof cloth.

COMPARATIVE EXAMPLE 3 Using a 210D nylon oxhorde base cloth not subjected to a fluorine-based water-repellent treatment, a vinyl chloride paste
The coating was applied at a rate of 00 g / m ² , and a fuse was applied with a far-infrared heater to obtain a waterproof cloth having a vinyl chloride coating.

[0026]

[Table 1]

The method for measuring physical properties and the like is as follows. Weight (g / m ² ): conforms to JIS L-1096 Adhesive force (kg / 5cm): conforms to JIS K-6328 Bending degree (mm): hydrolysable according to JIS L-1096 A method (vertical direction) : 70 ° C. × determining water resistance by visual observation state after 95% RH × 5 weeks ^{(g / m 2): JIS} L -1092 tear strength equivalent to (high water pressure method) (kg): JIS L -1096 D method ( Vertical ×
Horizontal) Tensile strength (kg / 5cm): According to JIS L-1096 (label strip) (vertical × horizontal)

The chemicals used are as follows. PTMG-2000: Ether-type polyol (manufactured by Sanyo Chemical Industries, Ltd.) IPDI: Isophorone diisocyanate (manufactured by Asahi Glass Co., Ltd.) AAE: Amino alcohol-EA (manufactured by Nippon Emulsifier Co., Ltd.) d-EA: Diethanolamine (manufactured by Nippon Shokubai Co., Ltd. J-820: Melamine-based cross-linking agent (Dainippon Ink Chemical Industry Co., Ltd.) PTSA (20%): IPA solution of paratoluenesulfonic acid (Gangnam Chemical Co., Ltd.) MP-185: Ether type Polyurethane resin (manufactured by Dainippon Ink and Chemicals, Inc.) Agent 776: Silicon-based additive (manufactured by Asahi Chemical Industry Co., Ltd.) LQ-540: Ether-type polyurethane resin (manufactured by Sanyo Chemical Industries, Ltd.) TA- 265: Ether type polyurethane adhesive (Dai Nippon Ink Chemical Industry Co., Ltd.) AG-710: Fluorine-based water repellent (Meisei Chemical Industry Co., Ltd.)

[0029]

According to the present invention, the material is lightweight, has a soft texture, is excellent in hydrolysis resistance, and has a surface strength and tear,
A waterproof cloth excellent in tensile strength was provided.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) D06M 15/568 D06M 15/568 // D06M 101: 34 (72) Inventor Sadao Tomioka Nihonbashi Muromachi, Chuo-ku, Tokyo 2-2-1, Toray Industries, Inc., Tokyo Office (72) Inventor Masanori Uemoto 15th, Kichijoin Ochiai-cho, Minami-ku, Kyoto, Kyoto Prefecture First Race Co., Ltd. (72) Inventor Kiyoshi Kawakami, Minami-ku, Kyoto, Kyoto (72) Inventor Takenori Furuya 15th Kichijoin Ochiaicho, Minami-ku, Kyoto, Japan F-term (reference) 3B011 BA00 BB09 4F100 AH05A AK36H AK48 AK51B AK51C AK51J AK54B AK54C AK54J AL01B AL01C BA03 BA07 BA10A BA10C CA02B CA30A DG04A DG12A GB04 JB07 JK02 JK03 JK13 JL03 4L033 AB04 AB05 AC03 BA11 BA28 BA69 CA17 CA22 CA36 CA60 CA70

Claims (6)

[Claims] 1. A first layer of a reactive polyurethane resin having a polyether bond containing a crosslinking agent is formed on at least one surface of a long fiber fabric, and then a one-pack type polyurethane resin having a polyether bond is formed. A waterproof cloth comprising a second layer formed and weighing 220 g / m ² or less. 2. The waterproof cloth according to claim 1, wherein the crosslinking agent of the first layer is a melamine-based crosslinking agent. 3. The waterproofing material according to claim 1, wherein the reactive polyurethane resin of the first layer has three or more functional groups in one molecule capable of reacting with a crosslinking agent. cloth. 4. The waterproof cloth according to claim 1, wherein the long-fiber woven fabric has been previously treated with a fluorine-based water repellent. 5. A commercial apron sewn with the waterproof cloth according to claim 1. 6. The commercial apron according to claim 5, which is an apron for fishery or fishery processing industry.