JPH11222778A - Woven fabric for industrial material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject woven fabric having preventing effects on fraying at the time of cutting, excellent in flame retardance and useful for an air bag, or the like, by sticking a specific polyurethane resin to the surface of a woven fabric. SOLUTION: This woven fabric is obtained by sticking a polyurethane resin (preferably having >=15% oxygen index) of a structure containing >=10 wt.% halogen (preferably bromine) in the main chain of a urethane in an amount of preferably 0.2-5 wt.% to at least one surface of a woven fabric such as nylon 66, nylon 46 or nylon 6. The resultant woven fabric has a coating resin film on at least the one surface and retains required mechanical characteristics.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a textile for industrial materials having an effect of preventing fraying at the time of cutting and having excellent flame retardancy. More specifically, the present invention relates to a textile having a coating resin film on at least one surface, While retaining the required mechanical properties,
The woven fabric has excellent flame retardancy and is intended to economically provide a woven fabric for industrial materials.

[0002]

2. Description of the Related Art Mechanical properties required for industrial fabrics include strength, fatigue resistance, abrasion resistance, heat resistance, flame resistance, weather resistance, corrosion resistance, moisture absorption, water absorption, adhesion and the like. Among them, flame retardant is an important property for various textiles for industrial materials, and is particularly required for applications such as safety nets, airbags, seat belts, canvases, tents, curing sheets, heat insulating materials, and the like.

Further, when cutting these industrial fabrics, the end portions are easily frayed, particularly when the surface is not solidified with resin. Therefore, the surface is generally processed with a resin to prevent it from fraying. However, it is necessary to impart a flame retardant particularly to the textile for industrial materials requiring the above flame retardancy.

[0004] Among the above-mentioned applications, airbags, which have been rapidly increasing in mounting rate as passenger safety awareness is one of the safety components for automobiles in recent years, have been developed in the event of an automobile collision.
The impact is detected by a sensor, and high-temperature, high-pressure gas is generated from the inflator, and the gas rapidly deploys the airbag to help protect occupants.

Conventionally, a base fabric coated with a synthetic rubber such as chloroprene, chlorsulfonated olefin, or silicone has been used in an airbag for the purpose of flame retardancy, heat resistance, and air barrier properties (air permeability). .

[0006] However, these coated base fabrics increase the weight of the base fabric, decrease the flexibility, increase the manufacturing cost,
Because it is not recyclable, there are many disadvantages in using it for airbag fabric. At present, silicone-coated base fabrics are used in some cases, but non-coated base fabrics are becoming the mainstream, and lightweight, compact, low manufacturing costs, and recycling are progressing.

However, when processing a non-coated base fabric into an airbag, it is necessary to cut it into a specific shape and sew it. At that time, the yarn is more likely to be frayed from the cut than the coated base fabric, and the frays burned out of the vent hole during deployment during an accident after becoming an airbag may fly out and cause burns to the occupant. is there.

Therefore, various studies have been made to prevent fraying. For example, JP-A-7-42
No. 043, a method in which 30% by weight or less of a resin is partially laminated on a fabric, or a method in which a resin is applied to an interlaced portion inside the fabric, as disclosed in JP-A-7-1886859. Impregnation treatment, JP-A-9-24
As disclosed in Japanese Patent No. 0405, there is a method in which a thermoplastic synthetic resin having an average thickness of 10 μm or less is tightly formed on the surface of a fiber base material so as to fill a contact between fibers.

[0009] In the case of the above-mentioned conventional example, there is a description in Example 2 that a brominated aromatic compound is mixed with an aqueous polyurethane resin as a method of imparting flame retardancy, but there is no description about flame retardancy. In addition, since the resin and the flame retardant are mixed and mixed, spots are formed on the base fabric and the flame retardant properties are lacking. In the case of the conventional example, a guanylsulfamide was used as the flame-retardant compound in Example 4, but this was also used as an additive, and the same problem of sticking spots as described above was observed. Flame retardancy, lack of reliability of base fabric properties. In the case of the conventional example, there is a description in the text that a flame retardant made of a halogen compound or the like can be added, but no specific flame retardant means is disclosed.

[0010]

DISCLOSURE OF THE INVENTION The present invention solves all the problems of the prior art described above, and has an effect of preventing fraying at the time of cutting and is excellent in flame-retardant performance. It is an object to provide an optimal textile for industrial materials.

[0011]

Means for solving the above-mentioned problem, ie, the present invention is a base fabric having a resin adhered to at least one surface of a woven fabric, wherein the resin contains a halogen in the main chain of urethane. The woven fabric for industrial materials, wherein the halogen is bromine, wherein the content of bromine in the woven fabric for industrial materials and the resin is 10% by weight or more, wherein the content of bromine is 10% by weight or more. Described industrial fabrics,
The woven fabric for industrial materials according to claim 1, wherein the oxygen index of the polyurethane resin is 15% or more, the woven fabric for industrial materials according to claim 1, wherein the adhesion amount of the resin is 0.2 to 5% by weight based on the weight of the woven fabric. The textile for industrial materials according to any one of claims 1 to 5, wherein the textile for industrial materials is a textile for airbags.
An airbag comprising the woven fabric for industrial materials described above.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The characteristics of the textile for industrial materials according to the present invention will now be described in detail. It is an economically produced textile which has an effect of preventing fraying at the time of cutting and is excellent in flame retardancy. is there. Here, the flame-retardant polyurethane resin is a resin containing a halogen atom in the main chain and making the resin itself flame-retardant. As described above, conventionally, when a woven fabric surface is coated with a polyurethane resin to exhibit a fraying-preventing effect, a flame-retardant compound is used as an additive to the polyurethane resin. Depending on the technique of mixing with the flame retardant, the uniform adhesion of the flame retardant compound to the surface of the woven fabric often becomes poor, and a defect that does not have the flame retardant property sometimes occurs.

[0013] The inventors of the present invention have conducted intensive studies, and as a result, in order to solve the above-mentioned problems, a flame-retardant polyurethane resin containing a halogen atom in the main chain and making the resin itself flame-retardant has been proposed. It has excellent flame retardancy and succeeds in enabling uniform adhesion on the fabric surface. here,
The halogen atom is not particularly limited, but bromine is preferably used.

It is necessary that the content of bromine atoms be at least 10% by weight of the total resin. If the content is less than 10% by weight, a sufficient flame retardant effect cannot be expected.

Further, the oxygen index of the flame-retardant polyurethane resin must be 15% or more, and if it is less than 15%, a sufficient flame-retardant effect cannot be expected.

The amount of the resin adhered to the weight of the fabric is preferably 5% by weight or less, more preferably 0.2 to 3% by weight. If the amount is less than 0.2% by weight, it is difficult to obtain a sufficient anti-fraying effect. If the amount is more than 5% by weight, the woven fabric becomes hard, which is not preferable in terms of storage.

The synthetic fiber constituting the airbag in the present invention is not particularly limited in material, but is particularly preferably an aliphatic polyamide fiber such as nylon 6, nylon 66, nylon 46 or nylon 12, or an aramid fiber. A homopolyester such as an aromatic polyamide fiber or polyethylene terephthalate or polybutylene terephthalate is used. Other examples include wholly aromatic polyesters, ultrahigh molecular weight polyethylene fibers, PPS fibers, and polyetherketone fibers. However, in consideration of economy and impact resistance, nylon 66, nylon 46, and nylon 6 are particularly preferable. In addition, there is no problem even if these synthetic fibers contain various additives in order to improve the processability in the yarn production process and the post-processing process. For example, antioxidants, heat stabilizers, leveling agents, antistatic agents, thickeners, flame retardants and the like.

[0018]

Next, the present invention will be described in more detail by way of examples. The physical properties in the examples were measured by the following methods.

[0019] Weight: JIS L1096 6.4.2

Thickness: JIS L1096 6.5

Woven density: JIS L1096 6.6

Softness: JIS L1096 6.19.1.A method (45 ° cantilever method)

Flame retardancy: FMVSS-302 method (horizontal method)

Fraying condition: 20 layers of woven fabric, diameter 800m
Using a cutting tooth having an R of m, punching was performed with an HO-2 type clicker press (manufactured by Hori Iron Works), and filament frays on the cut surface were visually observed.

Example 1 Plain weave using nylon 66 315d / 72f long fiber multifilament, and after drying by dipping a flame-retardant polyurethane resin containing 25% by weight of bromine in the main chain in a usual scouring process. The resin was treated so as to have a resin adhesion amount of 0.8% by weight, dried and set to obtain a non-coated airbag fabric having a warp density of 64 yarns / in and a weft density of 64 yarns / in. Table 1
Shows the physical properties of the obtained base fabric.

Example 2 Weaving with plain weaving using 315d / 72f long filament multifilament of nylon 66, and after drying by dipping a flame-retardant polyurethane resin containing 25% by weight of bromine in the main chain in a usual scouring process. The resin was treated to a resin adhesion amount of 3.0% by weight, dried and set to obtain a non-coated airbag fabric having a warp density of 64 / in and a weft density of 64 / in. Table 1
Shows the physical properties of the obtained base fabric.

Comparative Example 1 Weaving with plain weaving using a 315d / 72f long fiber multifilament of nylon 66, and drying by dipping a flame-retardant polyurethane resin containing 25% by weight of bromine in the main chain in a usual scouring process The resin was treated to a resin adhesion amount of 0.1% by weight, dried and set to obtain a non-coated airbag woven fabric having a warp density of 64 yarns / in and a weft density of 64 yarns / in. Table 1
Shows the physical properties of the obtained base fabric.

Comparative Example 2 Weaving with plain weaving using 315d / 72f long fiber multifilament of nylon 66, and drying by dipping a flame-retardant polyurethane resin containing 25% by weight of bromine in the main chain in a usual scouring process The resin was treated so as to have a resin adhesion amount of 6.0% by weight, dried and set to obtain a non-coated airbag fabric having a warp density of 64 yarns / in and a weft density of 64 yarns / in. Table 1
Shows the physical properties of the obtained base fabric.

Comparative Example 3 Weaving with plain weaving using 315d / 72f long fiber multifilament of nylon 66, and after drying by dipping a flame-retardant polyurethane resin containing 25% by weight of bromine in the main chain in a usual scouring process The resin was treated so as to have a resin adhesion amount of 0.8% by weight, dried and set to obtain a non-coated airbag fabric having a warp density of 64 yarns / in and a weft density of 64 yarns / in. Table 1
Shows the physical properties of the obtained base fabric.

Comparative Example 4 Weaving was carried out by plain weaving using a 315d / 72f long fiber multifilament of nylon 66, and the oxygen index was 1 during the ordinary scouring process.
Non-coated air of 0% flame retardant polyurethane resin is dried by dipping to a resin adhesion of 0.8% by weight after drying, dried and set, and has a density of 64 lines / in and a weft density of 64 lines / in. A bag fabric was obtained. Table 1 shows the physical properties of the obtained base cloth.

Comparative Example 5 An emulsion resin obtained by adding a brominated aromatic compound to a polyurethane resin by plain weaving using a nylon 66 315d / 72f long fiber multifilament and drying by dipping in a usual scouring process. Thereafter, the resin was treated so as to have a resin adhesion amount of 0.8% by weight, dried and set to obtain a non-coated airbag fabric having a warp density of 64 / in and a weft density of 64 / in. Table 1 shows the physical properties of the obtained base cloth.

COMPARATIVE EXAMPLE 6 Weaving was carried out by plain weaving using a 315d / 72f long fiber multifilament of nylon 66, and an emulsion resin obtained by adding a guanyl sulfamide to a polyurethane resin as a flame-retardant compound during a usual scouring step. After being dried by dipping, the resin is dried to a coating weight of 0.8% by weight, dried, set, and processed to a density of 64 lines / in and a weft density of 64 lines.
/ in non-coated airbag fabric. Table 1 shows the physical properties of the obtained base cloth.

[0033]

[Table 1]

As is clear from Table 1, both Examples 1 and 2 showed satisfactory results in the flame retardancy and the fraying effect, whereas Comparative Example 1 did not pass the flame retardancy and showed a fraying effect. Also had no effect. Comparative Example 2 satisfies the flame retardancy sufficiently, but becomes hard due to the rigidity and softness of the base cloth, which is not preferable in terms of storability for airbag applications. Comparative Examples 3 and 4 were not self-extinguishing in terms of flame retardancy, and were not satisfactory. Comparative Examples 5 and 6 partially showed flammability at the time of the combustion test, and it was found that the flame retardant effect was uneven.

[0035]

According to the present invention, it is possible to provide an industrial material woven fabric which has an effect of preventing fraying at the time of cutting which is required as an industrial material woven fabric and has excellent flame retardancy.

Claims (7)

[Claims] 1. A woven fabric for industrial materials, which is a base fabric having a resin adhered to at least one surface of the woven fabric, wherein the resin is a polyurethane resin having a structure containing a halogen in a main chain of urethane. 2. The industrial material fabric according to claim 1, wherein the halogen is bromine. 3. The textile for industrial materials according to claim 2, wherein the content of bromine in the resin is 10% by weight or more. 4. The textile for industrial materials according to claim 1, wherein the polyurethane resin has an oxygen index of 15% or more. 5. The method according to claim 1, wherein the amount of the resin adhered to the woven fabric is in a range of from 0.
The textile for industrial materials according to claim 1, which is 2 to 5% by weight. 6. The textile for industrial materials according to claim 1, wherein the textile for industrial materials is a textile for airbags. 7. An airbag comprising the textile for industrial materials according to claim 6.