JP2011106070A - Heat-resistant protective garment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide heat-resistant protective garment cloth excellent in chemical resistance, and moisture-permeable waterproofing properties, also having highly heat-insulating properties, lightness in weight, and flexibility. <P>SOLUTION: The heat-resistant protective garment includes a composite structure comprising a surface layer, an intermediate layer and a heat-insulating layer. The thicknesses of the surface layer and the heat-insulating layer of the protective garment satisfy the following equation: 5.0 mm≥the thickness of the heat-insulating layer (mm)≥-29.6×thickness of the surface cloth (mm)+14.1 mm. The heat-insulating layer contains ≥80% of aramid fiber, and is pleated so that the length of the crest of a pleat is 3-5 mm. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a heat-resistant protective garment, and more particularly, to a heat-resistant protective garment that not only has excellent chemical resistance and moisture-permeable waterproof properties, but also has high heat shielding properties, light weight, and flexibility.

  The fibers that make up heat-resistant protective clothing worn by firefighters during fire fighting operations are metal for the purpose of preventing radiant heat from fabrics made of flame-retardant organic fibers such as aramid fibers, polyphenylene sulfide, polyimide, and polybenzimidazole. Many aluminum and the like whose surface is processed by coating or vapor deposition are used. In recent years, this radiant heat has also become a very important specification, and ISO 11613 Approach A describes the specifications of the flame resistance test (ISO9151) and the radiation heat resistance test (ISO6942) as 13 seconds or more and 18 seconds or more, respectively.

  In addition to heat resistance, in order to prevent heat stroke caused by heat stress during summer work, in recent years, means such as using ice packs for the inner layer or ensuring air permeability by sewing have been used. Yes. In particular, weight reduction is a means for reducing heat stress and has been a problem from the past.

  As such heat-resistant protective clothing, a lightweight and bulky aramid web is shown as shown in Japanese Translation of PCT International Publication No. 2006-506555, but the fabric weight is heavy, and the number of laminated layers is the same as the fabric sandwiched between the webs. As a result, heat is trapped between the laminate fabric and the web. JP-T-2007-530806 discloses an example of a reinforced nonwoven fabric that increases its thickness when exposed to heat or flame, and retains thermal insulation, but because it is an increase in thickness in a high temperature region, There is no indication as to whether or not it will be effective in the innermost layer of fire protection clothing.

Special table 2006-506555 gazette Special table 2007-530806

  The present invention has been made against the background of the above-described prior art, and its purpose is to provide a heat-resistant protective clothing that not only excels in chemical resistance and moisture permeability and waterproofness, but also has high heat shielding properties, light weight, and flexibility. There is to do.

It is obtained as a result of earnest examination regarding heat-resistant protective clothing having high heat shielding and light weight, and flexibility, that is, according to the present invention,
A heat-resistant protective clothing comprising a fabric in which three layers of a surface layer, an intermediate layer, and a heat-shielding layer are laminated, wherein the following requirements are satisfied.
a) The thickness of the surface layer and the heat shielding layer satisfy the following formula.
5.0 mm ≧ heat shielding layer thickness (mm) ≧ −29.6 × surface layer thickness (mm) +14.1 mm
b) The heat-insulating layer is made of at least one selected from the group of pleated woven fabrics, knitted fabrics, and non-woven fabrics having a pleated valley mountain length of 3 to 5 mm.
c) The heat shield layer contains 80% by weight or more of aramid fibers.
d) The heat shield layer is quilted.
e) The RHTI _{24 of the} fabric (the time required for the temperature to rise by 24 degrees in the radiant heat test (ISO6942) in the approach A specification described in ISO11613) is 18 seconds or more.
Preferably, the quilting is performed at a width of 3 inches to 5 inches in a direction perpendicular to the direction of the pleats,
The basis weight of the heat shielding layer is 120 to 180 g / m ² ,
The fabric weight is 420 to 520 g / m ² ,
The heat shielding layer includes at least one meta-aramid fiber and para-aramid fiber,
The mixing ratio of the para-aramid fiber in the fibers constituting the surface layer is in the range of 2 to 60% by weight with respect to the total weight of the fibers constituting the surface layer,
A heat-resistant protective clothing in which the intermediate layer has a moisture-permeable waterproof layer;
Is provided.

  A heat-resistant protective garment composed of a fabric in which three layers of a surface layer, an intermediate layer, and a heat shield layer are laminated, and the heat shield layer is a pleated and quilted fabric with a specific length of the folds of the valley When the thickness of the surface layer and the heat shielding layer satisfies a specific formula, it can be made into a heat-resistant protective clothing satisfying high heat shielding properties, light weight, and flexibility.

The graph which shows the relationship between a thermal-insulation layer in case of surface layer thickness 0.46mm and RHTI ₂₄ The graph which shows the relationship between a thermal-insulation layer in case of surface layer thickness 0.45mm, and RHTI ₂₄ Graph showing the relationship between the surface layer thickness and the heat shield layer thickness for which RHTI ₂₄ satisfies 18 seconds or more Weave structure of thermal barrier layer

The heat-resistant protective clothing of the present invention is a heat-resistant protective clothing composed of a fabric in which three layers of a surface layer, an intermediate layer, and a heat shielding layer are laminated, and the thickness of the surface layer and the heat shielding layer satisfies the following formula: In addition, the heat-shielding layer includes aramid fibers of 80% or more, and the pleats and valleys have a length of 3 to 5 mm and are pleated and quilted, and are subjected to a radiant heat resistance test in the approach A specification described in ISO11613 ( This is a heat-resistant protective clothing in which the time RHTI ₂₄ until the temperature rises by 24 degrees in ISO 6942) is 18 seconds or more.
5.0 mm ≧ heat shielding layer thickness (mm) ≧ −29.6 × (surface thickness (mm)) + 14.1 (mm)

Hereinafter, the present invention will be described in detail.
The heat-resistant protective clothing of the present invention uses para-aramid fibers and meta-aramid fibers, either alone or in combination, for both the surface layer, the intermediate layer, and the heat-insulating layer, but as heat-resistant fibers that can be used in combination, Polybenzimidazole fiber, polyimide fiber, polyamideimide fiber, polyetherimide fiber, polyarylate fiber, polyparaphenylenebenzobisoxazole fiber, novoloid fiber, flame retardant acrylic fiber, polyclar fiber, flame retardant polyester fiber, flame retardant cotton fiber, flame retardant Examples include flame rayon fiber, flame retardant vinylon fiber, and flame retardant wool fiber.

  First, the surface layer will be described. The surface layer is composed of a fabric composed of meta-aramid fiber and / or para-aramid fiber, and the kind of fabric is at least one selected from the group of woven fabric, knitted fabric and non-woven fabric, and is practically strong. It is preferable to use a woven or knitted fabric.

  The meta-aramid fibers and para-aramid fibers can be used in the form of filaments, mixed yarns, spun yarns, etc., but are preferably mixed and used in the form of spun yarns. The mixing ratio of the para-aramid fibers is preferably 1 to 70% by weight with respect to the total weight of the fibers constituting the surface layer. If the mixing ratio of the para-aramid fibers is less than 1% by weight, the fabric may be broken, that is, pierced when exposed to a flame. If the mixing ratio exceeds 70% by weight, the para-aramid fibers It is not preferable because it is fibrillated and wear resistance is lowered.

The surface layer may be single ply or double ply.
Furthermore, the surface layer is processed by applying a fluorine-based water repellent resin by a processing method such as a coating method, a spray method, or a dipping method, so that it has higher water resistance and chemical resistance. Preferred for obtaining protective clothing.

Next, the intermediate layer may be woven into a structure such as plain weave, twill, warp double weave using meta aramid fiber, para aramid fiber, a combination of meta aramid fiber and para aramid fiber, etc. preferable. At this time, the basis weight of the intermediate layer is preferably 50 to 200 g / m ² . In the case of less than 50 g / m ^2, particularly in the case of a spun yarn, when tension is applied in the weaving process such as weaving, refining, and setting, the strength may be lowered and it may be lost. Moreover, when exceeding 200 g / m < ² >, it is heavy and unpreferable at the time of wear. The fiber constituting the fabric may be a spun yarn or a filament, and the form may be a woven fabric, a knit fabric, or a non-woven fabric.

  The intermediate layer preferably has a moisture permeable waterproof layer. The moisture permeable waterproof layer can be easily formed by laminating a polytetrafluoroethylene film having a moisture permeable waterproof function or laminating a polyurethane porous layer.

  The heat-shielding layer needs to contain 80% or more of aramid fibers, and if it is less than 80%, the heat resistance is lowered, which is not preferable. Further, the heat shield layer needs to be made of a fabric made of at least one selected from the group consisting of a woven fabric, a knitted fabric and a non-woven fabric containing at least one meta-aramid fiber and para-aramid fiber as an aramid fiber. Examples of materials other than aramid fibers include polyester fibers, cotton fibers, rayon fibers, vinylon fibers, and wool fibers. However, the mixing ratio is desirably less than 20%. Preferably it is 15% or less. If it is 20% or more, afterflame may be seen or melted in the test of JIS L 1091 A-4 method or JIS L 1091 A-1 method.

The basis weight of the heat shield layer is preferably 120 to 180 g / m ² . If it is less than 120 g / m < ² >, an intensity | strength will fall and it is unpreferable. When it exceeds 180 g / m ² , the protective clothing becomes heavy, which is not preferable.

  The pleating process is preferably side pleats, majolica pleats, crystal pleats, herringbone pleats, wave pleats, box pleats, or a combination thereof. Further, the length of the pleated mountain valley needs to be 3 to 5 mm. If it is less than 3 mm, the pleats are difficult to be bulky. When materials other than aramid fibers are contained, the heat setting after pleating is good at 180 ° C to 200 ° C, but if materials other than aramid fibers are 15% or less, the washing durability will be increased. It is necessary to carry out quilting. At that time, it is preferable to carry out the quilt with a width of 3 inches to 5 inches with respect to the pleats. If it is not a straight line, there is a concern about elongation during washing, and if the quilt width is less than 3 inches, the bulkiness due to pleats may be impaired. Moreover, when exceeding 5 inches, there is a concern about sag due to washing of pleats during quilting.

In addition, the thickness of the surface layer and the thickness of the heat shield layer must satisfy the following formula. When the formula is not satisfied, it becomes difficult to satisfy the radiant heat test (ISO6942) of 18 seconds or more which is an approach A specification of ISO11613 without an aluminum coating on the surface of the surface layer at a fabric basis weight of 420 to 520 g / m ² .
5.0 mm ≧ heat shielding layer thickness (mm) ≧ −29.6 × (surface thickness (mm)) + 14.1 (mm)

As a basis for deriving the above formula, when an ISO6942 test was conducted on a laminate using a heat shield layer with a fixed surface layer and intermediate layer and different heat shield layers, the heat shield property may increase in proportion to the thickness of the heat shield layer. all right. From the proportional formula of the heat shield layer thickness and RHTI ₂₄ , the heat shield layer thickness satisfying RHTI ₂₄ of 18 seconds or more was calculated (FIG. 1 (surface layer thickness 0.46 mm), FIG. 2 (surface layer layer thickness 0.45 mm)). . A similar test was performed on surface layers having different thicknesses. The above equation was calculated from the proportional equation by plotting the thicknesses of the surface layer and the heat shield layer satisfying the above-calculated specifications of 18 seconds or more on a graph (FIG. 3).

  Further, by satisfying the above formula, the heat shielding performance can satisfy the approach A specification of ISO11613, but the thickness of the heat shielding layer is preferably 5.0 mm or less. Preferably they are 1.3 mm-4.0 mm, More preferably, they are 1.7 mm-3.0 mm. More preferably, it is 2 mm. When the thickness exceeds 5.0 mm, the activity deteriorates, and in order to increase the thickness, the weft density must be reduced during weaving and knitting, and slipping is considered.

Thermally protective clothing weight of the present invention is preferably 420~520g / ^{m 2,} is less than 420 g / ^{m 2,} an approach A specification of ISO11613, Flame-resistant test (ISO9151), resistance radiant heat test (ISO6942) It becomes strict to satisfy the specifications of 13 seconds or more and 18 seconds or more, respectively. Moreover, when it exceeds 520 g / m < ² >, the weight of protective clothing will be increased and a wearer's movement will be inhibited.

Hereinafter, the present invention will be described in more detail with reference to examples. In addition, the measurement of the evaluation item used for the Example was performed with the following method.
(1) Thermal insulation (radiation resistant)
Based on ISO6942 (2002), RHTI ₂₄ was determined for the time when the copper sensor rose by 24 ° C. from the start of radiant heat exposure at a heat flux of 40 kW / m ² .
(2) Heat insulation (fire resistance)
Based on ISO 9151, HTI ₂₄ was determined as the time for the copper sensor to rise by 24 ° C. from the start of convective heat exposure.
(3) Thickness Based on JIS L 1018 (haired knitted fabric), a load of 3 g / cm ² was applied to perform measurement.
(4) Flammability Based on the JIS L 1091 A-1 method, the presence or absence of afterflame was confirmed by flame contact for 60 seconds and flame contact for 3 seconds.

[Example 1]
The outer layer is a layered structure. On the outside, polymetaphenylene isophthalamide fiber (trade name: Conex, manufactured by Teijin Techno Products) and coparaphenylene 3, 4 'oxydiphenylene terephthalamide fiber (Teijin Techno Products Company) Made by using a spun yarn (count: 40/2) made of heat-resistant fibers mixed at a mixing ratio of 90:10 with a product name of “trade name: Technora” and coparaphenylene-3 on the inside. 4% oxydiphenylene terephthalamide fiber (manufactured by Teijin Techno Products Co., Ltd., trade name: Technora) 100% spun yarn (count: 40 /-) was woven into a plain weave. The outer and inner fabrics were quilted with inner technola spun yarn in a lattice shape with a lattice spacing of 20 mm. The basis weight of the surface layer was 205 g / m ² .

In the intermediate layer, polymetaphenylene isophthalamide fiber (manufactured by Teijin Techno Products, trade name: Cornex) and coparaphenylene 3, 4 'oxydiphenylene terephthalamide fiber (manufactured by Teijin Techno Products Co., Ltd., trade name: Technora) ) Is woven into a plain weave using spun yarn (count: 40 / −) made of heat-resistant fibers mixed at a mixing ratio of 95: 5. A moisture-permeable waterproof film made of polytetrafluoroethylene (made by Japan Gore-Tex) was laminated on a woven fabric (weighing 65 g / m ² ).

For the heat-shielding layer, polymetaphenylene isophthalamide fiber (manufactured by Teijin Techno Products, trade name: Cornex) and coparaphenylene 3, 4 'oxydiphenylene terephthalamide fiber (manufactured by Teijin Techno Products Company, trade name: Techno) with a mixing ratio of 95: 5, a spun yarn (count: 40 /-) with a weaving density of warp 55 / inch and weft 55 / inch, and after weaving, 80 The paste was removed at 1 ° C. for 1 minute, and the final set was carried out at 180 ° C. for 1 minute, followed by side pleating with 3 mm pleats and heat setting at 190 ° C. Thereafter, quilting was performed perpendicular to the pleating at intervals of 5 inches. The basis weight of the heat shield layer was 140 g / m ² .
A fabric in which three layers of these surface layer, intermediate layer, and heat shielding layer were laminated was prepared, and the heat shielding property of the fabric was evaluated. The results are shown in Table 1.

[Example 2]
The surface layer and the intermediate layer are the same as in Example 1, and the heat shielding layer is polymetaphenylene isophthalamide fiber (manufactured by Teijin Techno Products, trade name: Conex) and coparaphenylene-3, 4′oxydiphenylene terephthalamide Except for using spun yarn in which polyester fiber (manufactured by Teijin Techno Products Co., Ltd., trade name: Technora) and non-aramid polyester fiber (manufactured by Teijin Fibers Ltd .: Ecopet Plus) is mixed at a ratio of 75/5/20 Performed as in Example 1.

[Comparative Example 1]
The surface layer and the intermediate layer were the same as in Example 1, the heat shield layer was weaving conditions, and the pleating was performed in the same manner as in Example 1, but the quilting was not performed.

[Comparative Example 2]
The surface layer and the intermediate layer are the same as in Example 1, and the spun yarn of the heat shield layer is made of polymetaphenylene isophthalamide fiber (manufactured by Teijin Techno Products Co., Ltd., trade name: Conex) and coparaphenylene 3, 4 ′ oxydi Phenylene terephthalamide fiber (manufactured by Teijin Techno Products Co., Ltd., trade name: Technora) Other than non-aramid polyester fiber (manufactured by Teijin Fibers Ltd .: Ecopet Plus) mixed at a ratio of 50/5/45 Was carried out in the same manner as in Example 1.

  The heat-resistant protective clothing of the present invention is not only excellent in chemical resistance and moisture permeability and waterproofness, but also has high heat shielding properties, light weight, and flexibility, so it is useful as heat-resistant protective clothing such as fire clothing and fire clothing. is there.

Claims (7)

A heat-resistant protective clothing comprising a fabric in which three layers of a surface layer, an intermediate layer, and a heat-shielding layer are laminated, wherein the following requirements are satisfied.
a) The thickness of the surface layer and the heat shielding layer satisfy the following formula.
5.0 mm ≧ heat shielding layer thickness (mm) ≧ −29.6 × surface layer thickness (mm) +14.1 mm
b) The heat shield layer is made of at least one selected from the group of pleated woven fabrics, knitted fabrics, and nonwoven fabrics having a pleated valley mountain length of 3 to 5 mm.
c) The heat shield layer contains 80% by weight or more of aramid fibers.
d) The heat shield layer is quilted.
e) The RHTI _{24 of the} fabric (the time until the temperature rises at 24 ° C. in the radiant heat resistance test (ISO6942) in the approach A specification described in ISO11613) is 18 seconds or more.   The heat-resistant protective clothing according to claim 1, wherein the quilting is performed in a width of 3 inches to 5 inches in a direction perpendicular to the direction of the pleats. The heat-resistant protective clothing according to claim 1, wherein the basis weight of the heat shielding layer is 120 to 180 g / m ² . Thermally protective garment of any one of claims 1 to 3, the basis weight of the fabric is 420~520g / ^{m 2.}   The heat-resistant protective clothing according to any one of claims 1 to 4, wherein the heat shielding layer includes at least one meta-aramid fiber and para-aramid fiber.   The heat-resistant protection according to any one of claims 1 to 5, wherein the fiber constituting the surface layer has a mixing ratio of the para-aramid fiber in the range of 2 to 60% by weight with respect to the total weight of the fibers constituting the surface layer. clothes.   The heat-resistant protective clothing according to any one of claims 1 to 6, wherein the intermediate layer has a moisture-permeable waterproof layer.

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