JP2003119675A - Cloth for fireproof clothes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cloth for fireproof clothes having most preferable liquid permeation-preventing properties to back side of a base cloth (outer clothes) without damaging moisture-permeability of the clothes, and having waterproofing property, fireproofing property, moisture-permeability and air permeability. SOLUTION: This cloth for fireproof clothes is obtained by using a heat resistant textile such as an aramid textile and subjecting the textile to a process with a specific silicone rubber. The silicone rubber processing uses a coating composition comprising the silicone rubber which is usually used for coating, an acrylic polymer resin and a flame retardant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof clothing material which is waterproof, fireproof, moisture permeable and breathable by applying a special silicone rubber treatment to a base fabric.

[0002]

2. Description of the Related Art In 1999, the international standard ISO 11613 "Protective clothing for fire brigade-testing method in laboratory and required characteristics" was decided. Until then, in Japan, there was no uniform standard for safety requirements for fire protection clothing, and each organization, local government, manufacturer, etc. adopted its own standard. The above ISO standard fireproof garment is usually composed of a combination of outer garment and inner garment (moisture permeable waterproof layer + heat insulating layer), and has extremely high flame resistance and heat transfer (flame exposure, radiant heat exposure) performance compared to conventional fire proof clothing. Are demanding.

As a result of the dramatic improvement in the heat insulation performance of the fireproof clothing according to this standard, there are cases where strong radiation heat (radiation heat) is not noticed at the flame site. The product is explained to be sufficiently washed and kept clean because there is a risk of ignition if chemicals adhere to the fireproof clothing or oil stains in the flame scene.

[0004]

When a woven fabric is used for the outer garment, it is usually treated with a water-repellent or oil-repellent treatment in order to prevent stains and increase in weight due to water content. As described above, as the number of times of washing increases, the functions of water and oil repellency deteriorate, so that more powerful water and oil repellency is applied. As a result, the dirt that is hard to get into the fabric is blocked by the strong water and oil repellent finishes, making it difficult to remove. In the water repellent treatment, if washing is performed until the water repellency is significantly reduced due to friction or the like and the stain is removed, the functions of the water repellent and oil repellent treatments are deteriorated, and water is contained and stains the back surface. Therefore, in the current situation of fire fighting control, the outer garment is washed and then immersed in a water and oil repellent treatment agent and then dried to maintain the water and oil repellency.

As described above, since the fire protection garment on the fabric surface requires labor and cost for maintenance, the present invention aims to reduce this burden. In order to achieve the above-mentioned object, it is optimum to prevent the liquid from penetrating into the back surface of the base cloth (outer garment) without impairing the moisture permeability of the fireproof clothing. Contrary to normal clothes, dirt on fire protective clothing at firefighting sites is different from ordinary clothes because of fire, smoke,
Substances such as charcoal, water, oil, chemicals, and dust are contaminated by contact, so the dirt cannot be removed by normal washing methods. In particular, the generally used washing method is to immerse the fireproof clothing in a water tank, pull it up, spread it on concrete etc., apply detergent and rub it with a deck brush. In the washing method, it is difficult to maintain the water-repellent and oil-repellent functions even with excellent water-repellent and oil-repellent treated cloths. If the water repellency is below grade 4, water drops will adhere to the base fabric (outer garment) and the back surface will start to penetrate. The greater the penetration into the back side, the higher the water content, which in turn leads to an increase in the weight of the fire protection clothing. If water drops do not penetrate to the back surface even if they adhere to the surface, it does not lead to a significant increase in weight. Therefore, even if the water and oil repellency are sacrificed, a method to prevent penetration to the back surface is taken. It is better to do it, and it is easier to remove stains even if you wash it, and it is much easier to maintain it if you let it dry naturally.

[0006] Silicone rubber processed cloth is widely used for sportswear, diaper covers, bibs, etc. as a material whose waterproof, moisture permeable, and breathable functions are not easily deteriorated even if it is washed many times. This is a known fact. However, the silicone rubbers blended with these are not suitable for fire protection clothing. When a flame resistance test JIS-L-1091 A-4 method (vertical method) was performed on a test piece that had been subjected to conventional silicone rubber processing using an aramid fiber woven fabric as the base cloth, the silicone rubber ignited and spread. It has gone. Therefore, in the present invention, a special silicone rubber that can withstand the use of fireproof clothing fabric has been developed.

[0007]

According to the present invention, the base cloth is treated with a special silicone rubber to prevent liquid permeation into the back surface of the base cloth (outer garment) without impairing the moisture permeability of the fireproof garment, and to prevent water and fire.
A fireproof cloth material having moisture permeability and breathability is provided. As the base fabric, a heat resistant fiber woven fabric, for example, an aramid fiber woven fabric can be used. For the processing of special silicone rubber, a coating agent composition having the following composition, in which a polymer acrylic resin and a flame retardant are used in combination with a silicone resin used for ordinary coating, is used. 100 parts by weight of a reactive organopolysiloxane having a hydroxyl group or a hydrogen group represented by: (B) a high molecular weight acrylic copolymer having a hydroxyl group, a carboxyl group or an amino group
1 to 50 parts by weight, preferably 10 to 30 parts by weight, and (C)
Flame retardant 10 to 200 parts by weight, preferably 50 to 100 parts by weight. Each of the above compounds is blended, and (D) an organotin compound, (E) a polyisocyanate and (F) a silane compound are added thereto, and the mixture is applied to a base cloth to form a cured film. This is processed as fireproof clothing material.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION As the high molecular acrylic copolymer (B), an acrylic acid alkyl ester monomer (alkyl group having 1 to 8 carbon atoms) or a methacrylic acid alkyl ester monomer (alkyl group having 1 to 8 carbon atoms) is used. (8) 100 to 100 parts by weight of a functional group-containing copolymerization monomer 0.1 to 10 parts by weight of a high molecular weight copolymer, a vinyl-based monomer copolymerizable with the above monomers, for example, styrene, acetic acid. Appropriate amounts of vinyl, acrylonitrile, etc. can be used.

Examples of the hydroxyl group-containing copolymerization monomer include 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate and the like. Examples of the carboxyl group-containing copolymerization monomer include acrylic acid, methacrylic acid, maleic anhydride, and itaconic acid. Examples of the amino group-containing copolymerization monomer include N, N dimethylaminoethyl acrylate and N, N dimethylaminoethyl methacrylate.

The high molecular weight acrylic copolymer has a weight average molecular weight of 500,000 to 1,500,000 and a glass transition temperature of 0 to 50 ° C.
As the flame retardant (C), a phosphorus-based flame retardant (ammonium polyphosphate), aluminum hydroxide or the like is used. As the substances (A) to (F), commercially available products exemplified below can be used. (A) TBS-30 (Tobe Co., Ltd., trade name) 80 to 100 parts by weight (B) XE-3437 (Tobe Co., Ltd., trade name) 20 to 50 parts by weight (C) NF-4 (Co., Ltd.) Tobe, trade name) 35 to 70 parts by weight (D) Cat TM (Tobe Co., Ltd., trade name) 0.5 to 3 parts by weight (E) Coronate HL (Nippon Polyurethane, trade name) 1 to 3 parts by weight (F) Cat TD (Tube Co., Ltd., trade name) 0.5-3 parts by weight

These are mixed with an organic solvent such as trichlorethylene and adjusted to a viscosity within the range of 1,000 to 50,000 cps and prepared as a coating agent, and a knife coater or roll coater is applied to both or one side of a cloth such as polyester, polyamide or aramid. Apply directly using a coating device such as. The coating amount is about 50 to 350 g / m ² . The viscosity and coating amount of the coating agent are appropriately adjusted depending on the type, material and performance of the cloth used.

Cloth coated with the coating agent 60 ~ 100 ℃
At the temperature of 30 seconds to 5 minutes, the organic solvent is evaporated to form a dried resin film. 120 more after drying
A heat treatment is carried out at a temperature of ˜180 ° C. for 30 seconds to 5 minutes to complete the addition and crosslinking reaction of the reactive organopolysiloxane and the high molecular weight acrylic copolymer. The silicone coating after crosslinking is also excellent in vapor permeability. In the case of aramid fiber,
The adhesion between the aramid fiber and the silicone rubber can be improved by blending the acrylic rubber.
By such a treatment, compared to the case where only the water repellent treatment is applied, the waterproof property and the flame retardant property are simultaneously given, and the washing resistance and the abrasion resistance are strong, and these performances are maintained for a long time. Fireproof clothing fabric is obtained.

Hereinafter, the present invention will be described in more detail with reference to examples. (Example 1) (A) TBS-30 (Tobe Co., Ltd., trade name) 80 parts by weight, (B) XE-3437 (Toube Co., Ltd., trade name) 20
35 parts by weight, (C) NF-4 (Tobe Co., Ltd., trade name) 35 parts by weight, (D) Cat TM (Tobe Co., Ltd., trade name) 0.5
6 parts by weight, (E) Coronate HL (Japan Polyurethane,
0.4 parts by weight of trade name and 0.56 parts by weight of (F) Cat TD (Tube Co., Ltd., trade name) were mixed with an organic solvent of trichlorethylene to adjust the viscosity to 18,000 cps and prepared as a coating agent. Composed of 40% meta-aramid fiber, 60% para-aramid fiber and 0.7% electrostatic fiber
/ 2S × 30 / 2S twill fabric is used as the base fabric, and the coating agent is applied directly to one side of the fabric using a roll coater.
3 g / m ^{2 was} applied. The flame resistance, mass, thickness, tensile strength, tear strength, tear strength, water repellency, water pressure resistance, and penetration into the back surface of each of the coating materials before and after processing the special silicone rubber were tested and summarized in the following table.

[0014]

[Table 1]

[0015]

As can be seen from the results of the above table, the base fabric (outer garment) used in the test originally has excellent flame resistance, but the fireproof clothing fabric processed as described above does not ignite. Not only that, the flame resistance was improved. Also,
No coloring was observed even if the surface had no water-repellent function, and the original purpose of preventing penetration of the liquid into the back surface was achieved. Also,
Processing weight is a very lightweight and about 25g per 1m ^2, was able to minimize the weight increase of fire protection clothing. In addition, the processing of this special silicone rubber has the following advantages. 1. The tear strength is usually that the thread of the woven fabric is fixed and cut one by one when rubberized, so the strength is usually reduced, but the special silicone rubber processing has a very soft texture. , The threads of each other complement each other and the tear strength increases. 2. The aramid fiber is reduced in tensile strength and tear strength due to light resistance deterioration in both the meta type and the para type, but is protected by a special silicone rubber and delays the deterioration rate. 3. The cut resistance is also increased by the resistance of the soft special silicone rubber, making it difficult to cut.

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) C08F 220/18 C08F 220/18 D06M 15/267 D06M 15/267 // C09K 3/18 101 C09K 3/18 101 104 104 104 21/02 21/02 21/04 21/04 (C08F 220/18 C08F 220: 28 220: 28 220: 04 220: 04 222: 06 222: 06 220: 34 220: 34) (72) Inventor Hisashi Kobayashi Taro, Tokyo, Shibuya-ku, Ebisu-minami 1-2-9 Kobayashi Fire Protection Co., Ltd. F term (reference) 3B011 AB01 AC14 4H020 BA02 BA03 BA05 BA32 BA33 4H028 AA07 AA12 4J100 AJ02Q AJ08Q AK32Q AL02P AL03P AL04P AL08R AL09Q BA31R CA04 AB04 AC05 BA69 BA92 BA96 CA18 CA19 CA59

Claims (7)

[Claims] 1. A base cloth 100 parts by weight of a reactive organopolysiloxane having a hydroxyl group or a hydrogen group represented by: (B) 1 to 50 parts by weight, preferably 10 parts by weight of a high molecular weight acrylic copolymer having a hydroxyl group, a carboxyl group or an amino group.
To 30 parts by weight, and (C) 10 to 200 parts by weight of a flame retardant, preferably 50 to 100 parts by weight, and (D) an organotin compound, (E) a polyisocyanate and (E). Fireproof clothing fabric processed with a special silicone rubber obtained by adding a silane compound. 2. The high-molecular acrylic copolymer of (B) is an acrylic acid alkyl ester monomer (alkyl group having 1 to 8 carbon atoms) or methacrylic acid alkyl ester monomer (alkyl group having 1 to 8 carbon atoms). The fireproof clothing material according to claim 1, wherein a polymer copolymer obtained by copolymerizing 0.1 to 10 parts by weight of a functional group-containing copolymerization monomer with respect to 100 parts by weight is used. 3. The hydroxyl group-containing copolymerization monomer (B) is selected from 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxyethyl methacrylate, and 2-hydroxypropyl methacrylate. Fireproof fabric. 4. The fireproof clothing fabric according to claim 1, wherein the carboxyl group-containing copolymerization monomer is selected from acrylic acid, methacrylic acid, maleic anhydride, and itaconic acid. 5. The fireproof clothing material according to claim 1, wherein the amino group-containing copolymerization monomer is selected from N, N dimethylaminoethyl acrylate and N, N dimethylaminoethyl methacrylate. 6. The fireproof clothing material according to claim 1 or 2, wherein the high molecular weight acrylic copolymer has a weight average molecular weight of 500,000 to 1,500,000 and a glass transition temperature of 0 to 50 ° C. 7. A special silicone rubber has a viscosity of 1,000 to 50,000c.
The fireproof clothing material according to any one of claims 1 to 6, wherein the coating amount is adjusted to be within the range of ps and the coating amount is 50 to 350 g / m ² .