WO2013183755A1 - Fabric for protective clothing, and arc-resistant protective clothing - Google Patents

Abstract

The present invention addresses the problem of providing a fabric for protective clothing having excellent arc resistance, flame retardation, and workability; and arc-resistant protective clothing containing the fabric. The present invention pertains to a fabric for protective clothing, characterized in comprising: acrylic fibers (A) containing 8 wt% or more of antimony oxide per the weight of acrylic fiber resin; and ablative flame retardant fibers (B-1) (which do not contain acrylic fibers); the content of ablative flame retardant fibers (B-1) being 3 wt% or more and less than 15 wt%, based on the fabric weight.

Description

Protective clothing fabric and arc-resistant protective clothing

The present invention relates to a protective clothing fabric and an arc resistant protective clothing.

Recently, many accidents due to arc flash have been reported, and measures to prevent the danger of arc flash are being studied. One of them is the standard NFPA 70E introduced by NFPA (National Fire Protection Association), which also defines the performance required for protective clothing exposed to arc flash. High arc resistance that satisfies the above-mentioned standards is required for protective clothing and the like worn by those working in an environment where there is a risk of being actually exposed to an electric arc, such as an electric mechanic or a firefighter.

Garments that provide 40-75% by weight modacrylic fiber, 1-40% by weight aramid fiber, and 10-40% by weight cotton fiber are known as garments that provide arc protection and flame resistance (see FIG. For example, see Patent Document 1). However, in Patent Document 1, no examination has been made on the fiber ablation phenomenon, and it is considered that there is room for improvement in terms of arc resistance. Furthermore, the specific garment described in Patent Document 1 uses 20% by weight or more of aramid fibers, which is an obstacle to the low-cost supply of work clothes for arc protection.

Also, about 40 to 65% by weight of antimony-containing modacrylic fiber or flame-retardant acrylic fiber, about 10 to 50% by weight of cotton or flame-treated cotton, about 25% or less of nylon, more than about 3% by weight For example, a flame-retardant fabric made of fibers containing less than about 10% by weight of p-aramid fibers is known (see, for example, Patent Document 2). However, in Patent Document 2, no examination has been made on the fiber ablation phenomenon. Further, in Patent Document 2, it is necessary to increase the basis weight in order to improve arc protection, and workability is improved. It was inferior to.

Therefore, there is currently no known protective clothing fabric having sufficient arc resistance and flame retardancy and excellent workability.

Also, in recent years, design properties such as dyeing in various colors have become one of the important factors in the fabrics for protective clothing, in addition to the characteristics such as arc resistance, flame retardancy, and workability. However, when the original color of the fabric is dark, there is also a problem that the desired color cannot be dyed. Therefore, it has also been desired that the protective clothing fabric has a green color suitable for dyeing in addition to the arc resistance, flame retardancy, and workability.

JP-T-2007-529649 US Patent Application Publication No. 2006/0292953

An object of the present invention is to provide a fabric for protective clothing having excellent arc resistance, flame retardancy, and workability, and an arc resistant protective clothing comprising the fabric. Another object of the present invention is to provide a fabric for protective clothing having excellent arc resistance, flame retardancy, and workability, and having a green color suitable for dyeing, and an arc resistant clothing comprising the fabric. And

As a result of investigations in view of the above problems, the present inventors have focused on the ablation phenomenon of fibers, contain a fusible fiber, and do not melt the dough after being irradiated with an arc, and carbonize in the form as it is. The present inventors have found that a cloth for protective clothing having excellent arc resistance and flame retardancy can be obtained even when thin, by using the cloth characterized in that it is thin.

That is, the present invention relates to an acrylic fiber (A) containing 8% by weight or more of antimony oxide based on the resin weight of the acrylic fiber, and a fusible flame retardant fiber (B-1) (provided that the acrylic fiber And the fusible flame retardant fiber (B-1) contains 3 wt% or more and less than 15 wt% based on the weight of the cloth.

The fusible flame retardant fiber (B-1) is one or more fibers selected from the group consisting of phenolic fibers, flame retardant vinylon fibers, melamine fibers, flame resistant fibers, and polytetrafluoroethylene fibers. It is preferable.

It is preferable that the acrylic fiber (A) is contained in an amount of 30% by weight or more based on the weight of the fabric.

Furthermore, it is preferable that the non-melting non-flame retardant fiber (D) is contained in an amount of 15 to 40% by weight, more preferably 25 to 40% by weight based on the weight of the fabric.

The acrylic fiber (A) is preferably a copolymer obtained by copolymerizing 40 to 70% by weight of acrylonitrile and 30 to 60% by weight of other components.

The other component is preferably a halogen-containing vinyl monomer and / or a halogen-containing vinylidene monomer.

The antimony oxide is preferably at least one compound selected from the group consisting of antimony trioxide, antimony tetroxide, and antimony pentoxide.

The ATPV value per unit weight measured by the following test method is preferably 1.2 or more.
<Measurement method of ATPV value per unit basis weight>
According to ASTM F1959 / F1959M-06ae1 (Standard Test for Determinating the Arc Rating of Materials for Closing), fabric weight per unit (oz / yd ² ) and ATPV (cal / cm ² ) were measured and measured. Then, the ATPV value per unit basis weight is calculated.

The present invention also relates to an acrylic fiber (A) containing at least 8% by weight of antimony oxide based on the resin weight of the acrylic fiber, an ablation fiber (B) (however, the acrylic fiber is not included), non- It is related with the cloth for protective clothing characterized by including a fusible flame-retardant fiber (C) and a non-flammable non-flame-retardant fiber (D).

It is preferable that the fusible fiber (B) is a phenol fiber.

The blending ratio of the non-melting flame retardant fiber (C) is preferably 0.1 to 50% by weight based on the total weight of the acrylic fiber (A) and the fusible fiber (B).

The weight ratio ((B) / (A)) of the fusible fiber (B) and the acrylic fiber (A) is preferably 0.1 to 1.5.

Furthermore, the present invention relates to an arc-resistant protective clothing comprising the protective clothing fabric.

The protective clothing fabric of the present invention comprises an acrylic fiber (A) containing 8% by weight or more of antimony oxide based on the resin weight of the acrylic fiber, and a fusible flame retardant fiber (B-1) (provided that acrylic The flame-retardant flame retardant fiber (B-1) contains 3% by weight or more and less than 15% by weight based on the weight of the fabric. It is capable of exhibiting flammability and has a green color suitable for dyeing.

It is a schematic diagram which shows the structure of the apparatus for arc resistance measurement.

The protective clothing fabric of the present invention comprises an acrylic fiber (A) containing 8% by weight or more of antimony oxide based on the resin weight of the acrylic fiber, and a fusible flame retardant fiber (B-1) (provided that acrylic The fusible flame retardant fiber (B-1) is contained in an amount of 3% by weight or more and less than 15% by weight based on the weight of the fabric.

The present invention has been made paying attention to the fiber ablation phenomenon. Here, fiber ablation (ablation) is that the fiber in contact with the arc melts and evaporates. The fabric of the present invention contains the acrylic fiber (A), which is such a fusible fiber, and the fusible flame retardant fiber (B-1). The arc temperature can be lowered by this, and even if it is thin, excellent arc resistance can be exhibited.

Further, the fabric of the present invention can further contain non-melting flame retardant fibers (C), and from the viewpoint of comfort and the like, non-melting non-flame retardant fibers (D) can be added. The non-ablative refractory fiber (D) is a non-flame retardant fiber, but it should be combined with an acrylic fiber (A) that releases a fire-extinguishing gas upon flame contact or a fusible flame retardant fiber (B-1) Thus, the flame is suppressed from being applied to the fabric.

In other words, in the present invention, only by using these acrylic fibers (A) and the fusible flame retardant fibers (B-1), excellent arc resistance and flame resistance can be exhibited even if they are thin. In addition, after the arc is irradiated, the fabric is not melted, and a fabric that is carbonized as it is can be obtained.

Furthermore, the present invention relates to an acrylic fiber (A) containing at least 8% by weight of antimony oxide based on the resin weight of the acrylic fiber, an ablation fiber (B) (however, the acrylic fiber is not included), non- The present invention also relates to a protective clothing fabric characterized by including a fusible flame retardant fiber (C) and a non-flamed flame retardant fiber (D).

In the present specification, the fusible fiber means that when a fiber sample is irradiated with a heat flow rate of 550 kW / m ² for 20 seconds, the surface temperature of the fiber rises and reaches the boiling point or the pyrolysis temperature of the fiber material, and the surface is open. It is defined to be in a phase state (decomposed gas). As described later, the fiber sample uses a tablet molding machine (for diameter 10 mm) (manufactured by JASCO Corporation) for 0.20 g of fiber material, and is 55 to 65 MPa using an electric hydraulic pump. It is a sample that was pressed for 60 to 180 seconds under pressure and formed into a tablet shape with a diameter of 11 ± 1 mm and a thickness of 3.5 ± 1 mm. In the present invention, the weight of the fiber is 157 g when irradiated with Inductively Coupled Thermal Plasma (ICTP) (plasma input power: 8.54 kW) corresponding to a heat flux of about 550 kW / m ² for 20 seconds. Those that decrease by more than / m ² are defined as ablation fibers, and those that decrease by less than 157 g / m ² are defined as non-aeration fibers.

As an apparatus capable of irradiating ICTP with the heat flux equivalent to about 550 kW / m ² , an apparatus having a high frequency induction thermal plasma generation unit can be exemplified. Such an apparatus capable of irradiating ICTP can more easily evaluate the arc resistance by irradiating a test object with ICTP instead of arc plasma. An example of such an apparatus will be described in more detail with reference to FIG.

The apparatus 5 capable of irradiating ICTP has a high frequency induction thermal plasma generation unit 10, which includes a gas inflow portion 11, a first tube portion 13 connected to the gas inflow portion 11, And an induction coil 15 wound around the outside of the first tube portion 13. When a high-frequency current is supplied to the induction coil 15 in a state where the gas flowing in from the gas inflow portion 11 is included in the first tube portion 13, the thermal plasma 12 can be generated in the first tube portion 13.

The first tube portion 13 is constituted by a double tube structure of a cylindrical quartz tube having an inner diameter of 70 mmφ, an outer diameter of 95 mmφ, and a length of 330 mm. By allowing cold water to pass through the gap portion 17, the first tube portion 13 is cooled from the heating by the plasma.

The first tube portion 13 has an induction coil 15 wound on the outside for 8 turns. By supplying a high-frequency current to the induction coil 15, an alternating magnetic field is generated in the first cylindrical portion 13 in the axial direction. The magnetic field induces an alternating electric field in the radial direction inside the first cylindrical portion 13. When a predetermined sheath gas is caused to flow from the gas inflow portion 11 in this state, the same gas is excited and ionized in the first tube portion 13 to generate thermal plasma. In the measurement method in the present invention, the following irradiation conditions are employed.

<Irradiation conditions>
Sheath gas: Ar
Plasma input power: 8.54 kW (heat flux equivalent to about 550 kW / m ² )
Sheath gas flow rate: 30 slpm
Pressure in the first tube portion 13: atmospheric pressure (760 Torr)

Further, a second cylindrical portion 20 is formed below the high frequency induction thermal plasma generating portion 10. The 2nd cylinder part 20 has the insertion part 27 for inserting the window part 25 for observing an inside from the outside, and the to-be-tested object installation stand 23 inside from the outer side. The test object mounting table 23 is set at a position 200 mm below the induction coil 15 and directly below the first tube portion 13. In addition, the test object mounting table 23 is not particularly limited as long as it can fix the test object 40 at a predetermined position during measurement.

Further, the test object 40 to be measured is as follows.

(Subject)
Using a tablet molding machine (for diameter 10 mm) (manufactured by JASCO Corporation) against 0.20 g of fiber material, pressurizing for 60 to 180 seconds under a pressure of 55 to 65 MPa using an electric hydraulic pump, The one formed into a tablet shape having a diameter of 11 ± 1 mm and a thickness of 3.5 ± 1 mm is used. Moreover, when measuring a fabric, the fabric itself can be used as a test object.

In FIG. 1, the slide portion 45 of the test object installation base 23 is fixed to the base 28, and the insertion port 27 is shielded by the base 28. Note that a water cooling mechanism 29 is provided behind the base 28 (on the side opposite to the test object mounting table 23), and the test object mounting table 23 can be cooled. The test object mounting table 23 can be made of stainless steel, and the test object mounting table 23 is cooled by a water cooling mechanism 29 so that it can withstand heating by thermal plasma irradiation.

Further, as shown in FIG. 1, the device 5 can be used together with the photographing unit 30 and the analysis processing unit 33 as necessary. The photographing unit 30 is a high-speed color video camera (VW-6000, manufactured by Keyence Corporation), and the analysis processing unit 33 is a spectrometer (high-speed multichannel spectrometer PMA-20, manufactured by Hamamatsu Photonics Co., Ltd.) can do.

The composition of the acrylic fiber (A) is not particularly limited as long as it contains 8% by weight or more of antimony oxide based on the resin weight of the acrylic fiber. % Of acrylonitrile and a copolymer obtained by copolymerizing 30 to 60% by weight of other components, and fibers containing 8% by weight or more of antimony oxide based on the resin weight of the acrylic fiber are preferably used. be able to. By setting the blending amount of acrylonitrile within the above range, it is preferable from the viewpoint of heat resistance and flame retardancy of the fabric.

Examples of the other components include halogen-containing vinyl monomers and sulfonic acid group-containing monomers.

Examples of the halogen-containing vinyl monomer include vinyl chloride, vinylidene chloride, vinyl bromide, vinylidene bromide, and one or more of these are used. The blending amount of the halogen-containing vinyl monomer is not particularly limited, but is preferably 30 to 60% by weight in the acrylic fiber from the viewpoint of flame retardancy and heat resistance.

Examples of the sulfonic acid group-containing monomer include methacryl sulfonic acid, allyl sulfonic acid, styrene sulfonic acid, 2-acrylamido-2-methylpropane sulfonic acid, and salts thereof. One or more of these may be used. Is used. Examples of the salt include, but are not limited to, sodium salt, potassium salt, ammonium salt and the like. The sulfonic acid group-containing monomer is used as necessary, and the blending amount thereof is preferably 0 to 3% by weight in the acrylic fiber. If it exceeds 3% by weight, the spinnability during the production of the acrylic fiber tends to decrease.

Examples of the antimony oxide contained in the acrylic fiber (A) include antimony trioxide, antimony tetraoxide, and antimony pentoxide. Among these, antimony trioxide is preferable. The content of antimony oxide is 8% by weight or more with respect to the resin weight of the acrylic fiber (A), preferably 9% by weight or more, more preferably 10% by weight or more, and 11% by weight or more. More preferably, it is particularly preferably 20% by weight or more. Moreover, the upper limit of the content of antimony oxide is not particularly limited, but is preferably 33% by weight or less, for example. If it exceeds 33% by weight, the spinnability during the production of the acrylic fiber tends to decrease.

Examples of the acrylic fiber (A) that can be suitably used in the present invention include Protex (registered trademark) M type and C type manufactured by Kaneka Corporation.

The blending ratio of the acrylic fiber (A) is not particularly limited, but is preferably 30% by weight or more based on the weight of the fabric, more preferably 40 to 65% by weight, and 45 to 60% by weight. % Is more preferable, and 50 to 55% by weight is particularly preferable. By making the compounding quantity of an acrylic fiber (A) into the said range, since the texture of a fabric and fire extinguishing performance can be made compatible, it is preferable.

In the present invention, acrylic fibers (A1) other than acrylic fibers (A) can also be included. Examples of the acrylic fiber (A1) include an acrylic fiber containing less than 8% by weight of antimony oxide based on the resin weight of the acrylic fiber, an acrylic fiber not containing antimony oxide, and the like. The blending amount of the acrylic fiber (A1) is not particularly limited as long as the effect of the present invention is not impaired, but is preferably 20% by weight or less based on the weight of the fabric.

The fusible flame retardant fiber (B-1) does not contain an acrylic fiber such as the acrylic fiber (A). For example, phenolic fiber, polytetrafluoroethylene (PTFE) fiber, melamine fiber And flame retardant vinylon fiber, flame resistant fiber and the like. Among these, phenol-based fibers and flame-resistant fibers are preferable from the viewpoint of achieving both arc resistance and flame resistance.

In this specification, the flame retardancy is defined in the JIS L1091E method (oxygen index method test), and a fiber having a LOI of 26 or more is referred to as a flame retardant fiber, and a fiber having a LOI of less than 26 is referred to as a non-flame retardant fiber. The LOI of the fibers described in this specification is shown in Table 2.

Examples of the phenol fiber include Kynol (registered trademark) (manufactured by Gunei Chemical Industry Co., Ltd.). Examples of the flame resistant fiber include Pyromex (manufactured by Toho Tenax Co., Ltd.).

The blending ratio of the fusible flame retardant fiber (B-1) is not particularly limited, but it is based on the weight of the fabric from the viewpoint of achieving both arc resistance, carbonization of the fabric, and flame retardancy. The content is preferably 1 to 50% by weight, more preferably 1 to 30% by weight, still more preferably 1 to 20% by weight, and 3% by weight to 15% by weight from the viewpoint of excellent green color. % Is more preferable, and 5 to 12% by weight is particularly preferable.

In the present invention, fusible non-flame retardant fibers (B-2) such as nylon fibers and rayon fibers can be included. Among these, polyhexamethylene adipamide (nylon 66) fiber is preferable from the viewpoint of heat resistance and fiber strength.

In the present invention, the fusible flame retardant fiber (B-1) and the fusible non-flame retardant fiber (B-2) may be collectively referred to as the fusible fiber (B). Examples of the additive amount of the emissive fiber (B) include the same additive amount as that of the fusible flame retardant fiber (B-1).

The weight ratio of the fusible fiber (B) and the acrylic fiber (A) is (B) / (A) = 0.1 to 1.5 from the viewpoint of achieving both arc resistance and flame retardancy. It is preferably 0.1 to 1.0, more preferably 0.1 to 0.5, still more preferably 0.1 to 0.3, and 0.1 to 0. Is more preferably 0.125, and particularly preferably 0.1 to 0.2. Further, even when the fusible fiber (B) is the fusible flame retardant fiber (B-1), the same range as described above is preferable.

Examples of the non-melting flame retardant fiber (C) include p-aramid fiber and flame retardant polyester fiber, and these can be used alone or in combination of two or more.

Examples of p-aramid that can be used in the present invention include Twaron (registered trademark, manufactured by Teijin Ltd.) and Kevlar (registered trademark, manufactured by DuPont). Examples of the copolymer of p-aramid and diaminophenylene-terephthalamide include Technora (registered trademark, manufactured by Teijin Limited).

The blending ratio of the non-absorptive flame retardant fiber (C) is preferably 30% by weight or less based on the weight of the fabric from the viewpoint of achieving both arc resistance, carbonization of the fabric, and flame retardancy. It is more preferably 1 to 30% by weight, further preferably 1 to 20% by weight, and particularly preferably 1 to 10% by weight.

Further, the blending ratio of the non-melting flame retardant fiber (C) is preferably 50% by weight or less based on the total weight of the acrylic fiber (A) and the fusible flame retardant fiber (B-1). The content is more preferably 0.1 to 50% by weight, further preferably 5 to 30% by weight, and particularly preferably 5 to 20% by weight. By setting it as such a mixture ratio, it is preferable from a viewpoint of arc resistance and a flame retardance.

Examples of the non-melting non-flame retardant fiber (D) include cotton, polyester fiber and the like, and these can be used alone or in combination of two or more. Among these, cotton is preferable.

The blending amount of the non-melting non-flame retardant fiber (D) is preferably 40% by weight or less, more preferably 1 to 40% by weight, still more preferably 15 to 40% by weight, Particularly preferred is ˜40% by weight. Within the above range, it is preferable in terms of flame retardancy and comfort (such as comfort).

The fabric of the present invention may be composed of one type of yarn or may be composed of a plurality of yarns. The yarn constituting the fabric of the present invention can be produced by a known spinning method. Examples of the spinning method include a ring spinning method and an air spinning method, but are not necessarily limited thereto.

The cloth of the present invention can be produced by a known cloth making method using the above-described yarn. Examples of the form of the fabric include, but are not limited to, a woven fabric, a knitted fabric, and a nonwoven fabric. Further, the woven fabric may be woven, and the knitted fabric may be knitted.

The structure of the woven fabric is not particularly limited, and may be a Mihara texture such as plain weave, twill weave, and satin weave, or a patterned fabric using a special loom such as jacquard. The structure of the knitted fabric is not particularly limited, and may be any of a round knitting, a flat knitting, and a warp knitting. Examples of the form of the nonwoven fabric include wet papermaking nonwoven fabric, carded nonwoven fabric, airlaid nonwoven fabric, thermal bond nonwoven fabric, chemically bonded nonwoven fabric, needle punched nonwoven fabric, hydroentangled nonwoven fabric, and stitchbonded nonwoven fabric.

Fabric having a basis weight of the present invention (unit: oz / yd ^2, the weight of the fabric per unit area (1 square yard) (ounces)) is 3 preferably ~ 10oz / yd ^2, more preferably 4 ~ 8oz / yd ² 4 to 6 oz / yd ² is more preferable. The fabric of the present invention is extremely thin and excellent in workability as compared with the conventional arc resistant fabric, and even such a thin fabric is excellent in arc resistance and flame retardancy.

The fabric of the present invention preferably has an ATPV value per unit weight measured by the following test method of 1.2 or more. Further, the upper limit of the ATPV (arc thermal performance value) value is not particularly limited, and the higher the value, the more preferable a thin fabric having arc resistance can be obtained.
<Measurement method of ATPV value per unit basis weight>
According to ASTM F1959 / F1959M-06ae1 (Standard Test for Determinating the Arc Rating of Materials for Closing), fabric weight per unit (oz / yd ² ) and ATPV (cal / cm ² ) were measured and measured. Then, the ATPV value per unit basis weight is calculated.

The fabric of the present invention has excellent arc resistance and flame retardancy although it is thinner than conventional arc resistant fabrics. The fabric of the present invention has a green color suitable for dyeing.

The arc-proof protective clothing of the present invention can be manufactured by a known method using the fabric. The arc-resistant protective clothing of the present invention can be used as a single-layer protective clothing using the fabric of the present invention in a single layer, or can be used as a multilayer protective clothing using the fabric of the present invention in two or more multilayers. Of course, it may be formed as a multilayer protective clothing by forming a multilayer with other fabrics.

The arc-resistant protective clothing of the present invention is not only arc-resistant, but also excellent in flame retardancy and workability, and can be used even when working in an environment involving the risk of arc flash. In addition, work clothes with high visibility can be provided, and work clothes with excellent wearing feeling can be provided. Furthermore, even if washing is repeated, the arc resistance and flame retardancy are maintained.

The present invention will be further described below with reference to examples and comparative examples, but the present invention is not limited to these examples.
Example 1
An acrylic resin in which 20% by weight of antimony trioxide is added to a copolymer obtained by polymerizing a composition comprising 50% by weight of acrylonitrile, 49% by weight of vinylidene chloride and 1% by weight of sodium styrenesulfonate. Fiber (Ac1 in Table 1) 50% by weight, phenol fiber (Gunei Chemical Industry Co., Ltd., Kynol (registered trademark), Kyn in Table 1) 10% by weight, para-aramid fiber (Teijin) Co., Ltd., Twaron (registered trademark), 5% by weight of Twa in Table 1 and 35% by weight of cotton (Cot in Table 1) are mixed, and are spun and twisted by a usual spinning method. A yarn (count: 20, single yarn) was obtained. Using the obtained spun yarn, a fabric (stencil knitting) was produced.
(Examples 2 to 4, Comparative Examples 1 to 6)
A fabric was produced in the same manner as in Example 1 except that the raw cotton composition shown in Table 1 was mixed.

The symbols shown in Table 1 are as follows.
Ac1: 20% by weight of antimony trioxide is added to a copolymer obtained by polymerizing a composition comprising 50% by weight of acrylonitrile, 49% by weight of vinylidene chloride and 1% by weight of sodium styrenesulfonate, based on the resin weight of the copolymer. Acrylic fiber (LOI: 34)
Ac2: 10% by weight of antimony trioxide is added to the copolymer obtained by polymerizing a composition comprising 50% by weight of acrylonitrile, 49% by weight of vinylidene chloride and 1% by weight of sodium styrenesulfonate, based on the resin weight of the copolymer. Acrylic fiber (LOI: 34)
Kyn: Phenolic fiber (manufactured by Gunei Chemical Industry Co., Ltd., Kynol (registered trademark), LOI: 32)
Pyr: Flame resistant fiber (Toho Tenax Co., Ltd., Pyromex, LOI: 55)
Ray: Rayon fiber (LOI: 18)
Ny66: Nylon 66 (LOI: 21)
Twa: Para-aramid fiber (manufactured by Teijin Limited, Twaron (registered trademark), LOI: 29)
TCS: Flame-retardant polyester fiber (Trevila CS, Trevira CS, LOI: 28)
Cot: Cotton (LOI: 18)
PET: Polyester fiber (LOI: 21)

The following evaluation was performed about the fabric obtained by the Example and the comparative example.
<Measurement of ablation>
0.20 g of various fibers used in the examples were applied for 60 to 180 seconds under a pressure of 55 to 65 MPa using an electric hydraulic pump using a tablet molding machine (for diameter 10 mm) (manufactured by JASCO Corporation). The specimen was molded into a tablet shape having a diameter of 11 ± 1 mm and a thickness of 3.5 ± 1 mm.

The obtained specimen is set in the apparatus 5 shown in FIG. 1 and irradiated with thermal plasma having a thermal flux equivalent to 550 kW / m ² for 20 seconds under the following irradiation conditions, and the weight of the fiber is reduced by 157 g / m ² or more. The fiber was designated as a fusible fiber, and the fiber that decreased by less than 157 g / m ² was designated as a non-melting fiber. The measurement results are shown in Table 2 below. Table 2 also describes the ablation measurement results and LOI values for the fibers described in this specification other than those used in the examples.
(Irradiation conditions)
Sheath gas: Ar
Plasma input power: 8.54 kW (heat flux equivalent to about 550 kW / m ² )
Sheath gas flow rate: 30 slpm
Pressure in the first tube portion 13: atmospheric pressure (760 Torr)

As is clear from Table 2, Ac1, Ac2, Kyn, Vin, Bas, Pyr, Toy, Ray, Ny66 are ablation fibers, and Twa, TCS, Cot, and PET are non-ablative fibers. .

<Arc test>
ASTM F1959 / F1959M-06ae1 (Standard Test Method for Determining the Arc Rating of Materials for Clothing) on the basis of the arc test (hereinafter simply referred to as "arc test") in accordance with a basis weight (oz / yd ²⁾ and ATPV (cal / cm ² ). From these values, the ratio ATPV ((cal · yd ² ) / (cm ² · oz)), which is an ATPV per unit basis weight, was calculated. The evaluation results are shown in Table 1.

<Flame retardance>
Carbonization length was measured according to ASTM D6413-08 Standard Test Method for Frame Resistance of Textiles (Vertical Test). The carbonization length is preferably less than 6 inches. The evaluation results are shown in Table 1.

<Raw color>
The fabrics obtained in Examples and Comparative Examples were visually observed and evaluated according to the following evaluation criteria.
○: The raw machine color is thin, and it can be dyed to a desired color.
(Triangle | delta): The raw machine color is comparatively thin and it is possible to dye to a desired color to some extent.
X: The raw machine color is dark and it is difficult to dye to a desired color.
Similarly, the hue of the fabric can be quantitatively evaluated by showing the result of color measurement using a spectrocolorimeter CM-2600d (manufactured by Konica Minolta) in the Hunter Lab color system.

5: Device 10: High-frequency induction thermal plasma generation unit 11: Gas inflow unit 12: Thermal plasma 13: First tube unit 15: Inductive coil 17: Crevice unit 20: Second tube unit 23: Test object installation table 25: Window Section 27: Insertion slot 28: Base 29: Water cooling mechanism 30: Imaging section 33: Analysis processing section 40: Test object 45: Slide section

Claims (9)

1. Including acrylic fiber (A) containing 8% by weight or more of antimony oxide based on the resin weight of acrylic fiber, and fusible flame retardant fiber (B-1) (however, acrylic fiber is not included) ,
   A fabric for protective clothing, wherein the fusible flame retardant fiber (B-1) is contained in an amount of 3% by weight to less than 15% by weight based on the weight of the fabric.
2. The fusible flame retardant fiber (B-1) is one or more fibers selected from the group consisting of phenol fiber, flame retardant vinylon fiber, melamine fiber, flame resistant fiber, and polytetrafluoroethylene fiber. The fabric for protective clothing according to claim 1.
3. The fabric for protective clothing according to claim 1 or 2, comprising acrylic fiber (A) in an amount of 30% by weight or more based on the weight of the fabric.
4. The fabric for protective clothing according to any one of claims 1 to 3, further comprising 15 to 40% by weight of the non-melting non-flame retardant fiber (D) based on the weight of the fabric.
5. 5. The acrylic fiber (A) is a copolymer obtained by copolymerizing 40 to 70% by weight of acrylonitrile and 30 to 60% by weight of other components. The fabric for protective clothing described in 1.
6. 6. The protective clothing fabric according to claim 5, wherein the other component is a halogen-containing vinyl monomer and / or a halogen-containing vinylidene monomer.
7. The protective clothing according to any one of claims 1 to 6, wherein the antimony oxide is one or more compounds selected from the group consisting of antimony trioxide, antimony tetraoxide, and antimony pentoxide. Fabric.
8. The protective clothing fabric according to any one of claims 1 to 7, wherein an ATPV value per unit weight measured by the following test method is 1.2 or more.
   <Measurement method of ATPV value per unit basis weight>
   According to ASTM F1959 / F1959M-06ae1 (Standard Test for Determinating the Arc Rating of Materials for Closing), fabric weight per unit (oz / yd ² ) and ATPV (cal / cm ² ) were measured and measured. Then, the ATPV value per unit basis weight is calculated.
9. An arc-resistant protective clothing comprising the protective clothing fabric according to any one of claims 1 to 8.

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