JP2020026597A - Double weave fabric and protective clothing - Google Patents

Abstract

To provide a double weave fabric containing flame-retardant fiber and a protective clothing, not only having flame resistance but also being capable of effectively forming a heat insulating air layer.SOLUTION: A double weave fabric containing flame-retardant fiber has protruding parts alternately on the front side and the rear side, in the warp direction or the weft direction of the fabric.SELECTED DRAWING: Figure 6

Description

  TECHNICAL FIELD The present invention relates to a double woven fabric containing flame-retardant fibers, which is not only flame-retardant but also can effectively form a heat-insulating air layer and a protective garment.

  As a fiber constituting a heat-resistant protective clothing worn by a firefighter during a fire fighting operation, the purpose is to prevent radiant heat on a fabric made of flame-retardant organic fibers such as aramid fiber, polyphenylene sulfide fiber, polyimide fiber and polybenzimidazole fiber. Of those, surface-treated by coating or vapor deposition of metallic aluminum or the like is often used. In addition, in order to prevent heat stroke due to heat stress in summer work as well as heat resistance, in recent years, means of using an ice pack for the inner layer or securing air permeability by sewing have been used. ing.

  As such heat-resistant protective clothing, for example, as shown in Patent Document 1, high heat-shielding and lightweight heat-resistant fireproof clothing has been disclosed, but washing durability has not been satisfactory yet.

JP 2010-256129 A

  The present invention has been made in view of the above background, and an object of the present invention is to provide a double woven fabric containing flame-retardant fibers, which not only has flame retardancy but also can effectively form a heat-blocking air layer. To provide heavy fabrics and protective clothing.

  The present inventors have conducted intensive studies to achieve the above object, and as a result, by devising a woven structure in a double woven fabric containing flame-retardant fibers, not only the flame retardancy, but also the effective heat shielding air The present inventors have found that a double woven fabric capable of forming a layer can be obtained, and have made extensive studies to complete the present invention.

  Thus, according to the present invention, "a double woven fabric containing flame-retardant fibers, characterized by having alternately convex portions on the front side and the back side in the warp or weft direction of the fabric." Is provided.

At this time, the thickness specified in JIS L1096 (for hair knitted fabric) is preferably 2.0 mm or more. Further, it is preferable that the distance between the protrusions is in the range of 1 to 20 mm. Further, the flame-retardant fiber is a meta-type wholly aromatic polyamide fiber, a para-type wholly aromatic polyamide fiber, a flame-retardant rayon fiber, a modacrylic fiber, a flame-retardant acrylic fiber, a flame-retardant vinylon fiber, a polybenzoxazole fiber, It is preferable to include at least one of the group consisting of benzimidazole fibers, melamine fibers, polyimide fibers, and polyimide amide fibers. Preferably, the double woven fabric further contains polyester fibers. Further, it is preferable that the flame retardant fiber and the polyester fiber are contained in a double woven fabric as a composite yarn.
Further, according to the present invention, there is provided a protective suit including the double woven fabric. In addition, the protective clothing is a combination of the outer fabric layer and the intermediate layer using the double woven fabric as a heat shield layer. In a test defined in ISO6942, the time RHTI24 until the sensor temperature rises by 24 ° C. is 18 seconds or more. Yes, and in the test specified in ISO 9151, a protective garment is provided that has a time HTI of 13 seconds or more before the sensor temperature rises by 24 ° C.

  ADVANTAGE OF THE INVENTION According to this invention, it is a double woven fabric containing a flame-retardant fiber, and can obtain not only the flame proof but also the double woven fabric which can form a heat-shielding air layer effectively and a protective suit.

FIG. 3 is an organization chart used in Example 1. FIG. 9 is an organization chart used in Example 2. FIG. 9 is an organization chart used in Example 3. FIG. 4 is an organization chart used in Comparative Example 1. FIG. 9 is an organization chart used in Comparative Example 2. It is sectional drawing which shows typically the mode which has a convex part in the front side and the back side alternately in the double fabric of this invention.

  Hereinafter, embodiments of the present invention will be described in detail. First, the double woven fabric of the present invention is a double woven fabric containing flame-retardant fibers, and has convex portions alternately on the front side and the back side in the warp direction or the weft direction of the fabric. For example, in a case where convex portions are alternately provided on the front side and the back side in the warp direction of the fabric, the convex portions are continuous in a ridge shape in the weft direction. Further, when the fabric has alternately convex portions on the front side and the back side in the weft direction, the convex portions are continuous in a ridge shape in the warp direction. By having the convex portions alternately on the front side and the back side in the warp direction or the weft direction of the fabric, the height of the convex portions for achieving the desired thickness can be reduced, and the washing durability can be improved. In order to obtain a desired thickness without alternately arranging the convex portions, it is necessary to increase the height of one convex portion, and the convex portions may be crushed during washing.

  At this time, the thickness (height shown in FIG. 6) defined in JIS L1096 (for hair knitted fabric) is 2.0 mm or more (more preferably 2.0 to 6.0 mm, particularly preferably 2.0 to 5.0 mm). ) Is preferable. If the thickness is less than 2.0 mm, heat may not be effectively blocked.

  In addition, the convex portions which are reversed from each other in the warp direction or the weft direction of the cloth may be in contact with the ends of the convex portions as shown in the upper diagram of FIG. 6 or may be formed as shown in the lower diagram of FIG. May be far away. In the latter case, it is preferable that the distance between the protrusions is in the range of 1 to 20 mm. If it is less than 1 mm, the shape of the convex portion is not maintained during washing, which may cause a decrease in the thickness of the double woven fabric. If it is larger than 20 mm, the air layer may not be sufficiently provided. Further, the density of the region is preferably at least 50 warps / 2.54 cm and at least 50 wefts / 2.54 cm.

  Examples of the flame-retardant fiber include meta-type wholly aromatic polyamide fiber, para-type wholly aromatic polyamide fiber, flame-retardant rayon fiber, modacrylic fiber, flame-retardant acrylic fiber, flame-retardant vinylon fiber, polybenzoxazole fiber, and polybenzo. Examples include imidazole fiber, melamine fiber, polyimide fiber, and polyimide amide fiber, and are not particularly limited. In the case of performing flame-retardant processing, the material is not particularly limited.

  The double woven fabric of the present invention may further contain polyester fibers, nylon fibers, acrylic fibers, and the like. For example, the flame retardant fiber and the polyester fiber are preferably contained at a ratio of 60/40 to 95/5, and more preferably 80/20 to 95/5. When the mixing ratio of the polyester fiber is less than 5%, the time RHTI24 until the sensor temperature rises by 24 ° C. in the radiant heat test defined in ISO6942 may not be 18 seconds or more. On the other hand, when the mixing ratio of the polyester fiber is more than 40%, there is a possibility that after-flame may occur or the material may be melted during the test according to the JIS L 1091 A-4 method or the JIS L 1091 A-1 method.

  In particular, it is preferable that the flame retardant fiber and the polyester fiber are included in the double woven fabric as a composite yarn. At that time, it is preferable that the polyester fiber is coated with the flame-retardant fiber. The weight ratio of the polyester fiber is preferably 50 to 90% by weight (more preferably 70 to 90% by weight, and still more preferably 75 to 90% by weight) relative to the weight of the composite yarn. When the weight ratio of the polyester fiber is less than 50%, there is a possibility that afterflame may be observed or the resin may be melted during the test according to the JIS L 1091 A-4 method or the JIS L 1091 A-1 method. On the other hand, when the weight ratio of the polyester fiber exceeds 90%, the thickness does not come out due to the high coverage, and in the radiant heat test specified in ISO6942, the time RHTI24 until the sensor temperature rises by 24 ° C. is 18 seconds or more. There is a possibility that it does not become.

  In the double woven fabric of the present invention, as a production method, for example, weaving may be performed using the flame-retardant fiber according to the weaving organization diagram shown in FIGS. 1 to 3. In this case, preferred looms include shuttle looms, rapier looms, air jet looms and the like.

  Since the double woven fabric of the present invention has the above-described configuration, it is possible to form not only the flame retardancy but also the heat-shielding air layer effectively.

Next, the protective garment of the present invention includes such a double woven fabric. At this time, it is preferable that the outer fabric layer, the intermediate layer, and the heat shield layer have a structure in which three layers are superimposed in this order, and among these layers, the double woven fabric is preferably disposed on the heat shield layer.
Further, it is preferable that the outer layer and the intermediate layer are also made of a heat-resistant cloth containing the flame-retardant fiber.

  First, the surface layer will be described. The outer layer is preferably made of a fabric composed of meta-aramid fibers and para-aramid fibers. As the type of the fabric, a woven or knitted fabric or a nonwoven fabric is used, and in practice, it is preferably a woven fabric in terms of strength. . Further, the meta-aramid fiber and the para-aramid fiber can be used in the form of a filament, a mixed fiber, a spun yarn, or the like, but it is preferable to use a mixed spun yarn in the form of a spun yarn. The mixing ratio of the para-aramid fibers is preferably from 1 to 70% by weight based on the total weight of the fibers constituting the surface layer. If the mixing ratio of the para-aramid fiber is less than 1% by weight, the fabric may be broken, that is, a hole may be formed when exposed to a flame. It may be fibrillated and the wear resistance may be reduced. The surface layer may be a single ply or a double ply. Applying a fluorine-based water-repellent resin to the surface layer by a processing method such as a coating method, a spray method, or an immersion method, and processing the protective layer with higher water resistance and chemical resistance. Preferred for getting clothes.

  The intermediate layer preferably has a moisture-permeable and waterproof property, and a layer obtained by laminating a moisture-permeable and waterproof thin film on a woven fabric composed of meta- or para-aramid fibers is most preferably used. As a particularly preferred intermediate layer, a woven fabric made of a meta-aramid fiber such as polymetaphenylene isophthalamide which is a flame-retardant material is used, and a thin film made of moisture-permeable and waterproof polytetrafluoroethylene is used for the woven fabric. Laminated ones are exemplified. By inserting such an intermediate layer, the moisture permeability and the chemical resistance are improved, and the evaporation of sweat of the wearer is promoted, so that the heat stress of the wearer can be reduced. The fibers constituting the cloth may be spun yarns or filaments, and may be woven, knitted or non-woven fabrics.

  Such protective clothing is not only flame-retardant, but also can effectively form a heat-insulating air layer. At that time, in the test specified in ISO6942, it is preferable that the time RHTI24 until the sensor temperature rises by 24 ° C. is 18 seconds or more. Further, in the test specified in ISO9151, the time HTI is preferably 13 seconds or more before the sensor temperature rises by 24 ° C.

  The double woven fabric is suitably used not only for protective clothing, but also for textile products such as fire and fire protection clothing, fire fighting clothing, rescue clothing, workwear, police uniforms, SDF clothing, military clothing, and the like.

Next, examples and comparative examples of the present invention will be described in detail, but the present invention is not limited to these examples.
(1) Thickness
The measurement was performed under a load of 3 g / cm ^{2 according to} JIS L1096 (for hair knitted fabric).
(2) Heat insulation (radiation heat resistance)
Based on ISO6942 (2002), RHTI24 was determined at a heat flux of 40 kW / m ² , at which time the copper sensor rose by 24 ° C. from the start of radiation heat exposure.
(3) Heat insulation (fire resistance)
Based on ISO9151, HTI24 was determined as the time required for the copper sensor to rise by 24 ° C. from the start of convective heat exposure.

[Example 1]
The outer layer is made of a mixture of polymetaphenylene isophthalamide fiber (manufactured by Teijin Limited, trade name: Conex) and coparaphenylene-3,4'oxydiphenylene terephthalamide fiber (manufactured by Teijin Limited, trade name: Technora) A fabric (basis weight: 240 g / m ² ) woven into a 2/1 twill weave using spun yarn (count: 40/2) made of heat-resistant fibers mixed at a ratio of 90:10 was used.

The intermediate layer is made of a mixture of polymetaphenylene isophthalamide fiber (manufactured by Teijin Limited, trade name: Conex) and coparaphenylene 3,4 'oxydiphenylene terephthalamide fiber (manufactured by Teijin Limited, trade name: Technora) The yarn was woven in a plain weave using a spun yarn (count: 40 /-) made of heat-resistant fibers mixed at a ratio of 95: 5. A commercially available moisture-permeable and waterproof film made of polytetrafluoroethylene was laminated on a woven fabric (having a basis weight of 65 g / m ² ).

Polymetaphenylene isophthalamide fiber (manufactured by Teijin Limited, trade name: Conex) and coparaphenylene 3,4 'oxydiphenylene terephthalamide fiber (manufactured by Teijin Limited, trade name: Technora) were used for the heat shielding layer. A yarn 1 composed of a spun yarn (count: 40 /-) composed of heat-resistant fibers mixed at a mixing ratio of 95: 5, one polyethylene terephthalate fiber of 33 dtex / 12 filaments and the above 1 are combined, A yarn 2 having been twisted 500 times in the S direction and a woven fabric having a weaving density of 113 yarns / 2.54 cm and a weft of 80 yarns / 2.54 cm according to the structure diagram shown in FIG. Draining was performed, and the final set was used at 180 ° C. for 1 minute (double fabric having convex portions alternately on the front and back sides in the longitudinal direction).
Table 1 shows the evaluation results of the protective clothing in which the three layers of the outer layer, the intermediate layer, and the heat shield layer in which the convex portions are alternately arranged are stacked.

[Example 2]
Example 1 was carried out in the same manner as in Example 1 except that the heat shield layer was changed to the structure diagram shown in FIG.

[Example 3]
Example 1 was carried out in the same manner as in Example 1 except that the heat shield layer was changed to the structure diagram shown in FIG.

[Comparative Example 1]
Example 1 was carried out in the same manner as in Example 1 except that the heat shield layer was changed to the structure diagram shown in FIG.

[Comparative Example 2]
Example 1 was carried out in the same manner as in Example 1 except that the heat shield layer was changed to the structure diagram shown in FIG.

  Industrial Applicability According to the present invention, there is provided a double woven fabric containing a flame-retardant fiber, which is not only flame-retardant but also capable of effectively forming a heat-insulating air layer, and a protective garment. The value is extremely large.

Claims (8)

  What is claimed is: 1. A double woven fabric containing flame-retardant fibers, wherein the double woven fabric has alternately convex portions on a front side and a back side in a warp direction or a weft direction of the fabric.   The double woven fabric according to claim 1, wherein the thickness specified in JIS L1096 (for hair knitted fabric) is 2.0 mm or more.   The double woven fabric according to claim 1 or 2, wherein a distance between the convex portions is in a range of 1 to 20 mm.   The flame-retardant fiber is a meta-type wholly aromatic polyamide fiber, a para-type wholly aromatic polyamide fiber, a flame-retardant rayon fiber, a modacrylic fiber, a flame-retardant acrylic fiber, a flame-retardant vinylon fiber, a polybenzoxazole fiber, a polybenzimidazole. The double woven fabric according to any one of claims 1 to 3, comprising at least one of the group consisting of fibers, melamine fibers, polyimide fibers, and polyimide amide fibers.   5. The double woven fabric according to claim 4, wherein the double woven fabric further comprises polyester fibers.   The double woven fabric according to claim 5, wherein the flame retardant fiber and the polyester fiber are included in the double woven fabric as a composite yarn.   A protective suit comprising the double woven fabric according to any one of claims 1 to 6.   A protective garment comprising the double woven fabric according to any one of claims 1 to 7 as a heat shield layer and a surface layer and an intermediate layer, and in a test defined by ISO6942, a sensor temperature increases by 24 ° C. A protective suit having a time RHTI 24 of 18 seconds or more and a time HTI of 13 seconds or more before the sensor temperature rises by 24 ° C. in a test specified in ISO9151.

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