JP3666053B2 - Fabric with excellent flame resistance - Google Patents
Fabric with excellent flame resistance Download PDFInfo
- Publication number
- JP3666053B2 JP3666053B2 JP10309695A JP10309695A JP3666053B2 JP 3666053 B2 JP3666053 B2 JP 3666053B2 JP 10309695 A JP10309695 A JP 10309695A JP 10309695 A JP10309695 A JP 10309695A JP 3666053 B2 JP3666053 B2 JP 3666053B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- fabric
- flame
- polybenzazole
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004744 fabric Substances 0.000 title claims description 23
- 239000000835 fiber Substances 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 25
- 238000002156 mixing Methods 0.000 claims description 18
- 229920006231 aramid fiber Polymers 0.000 claims description 10
- 238000003763 carbonization Methods 0.000 claims description 9
- 238000010998 test method Methods 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 description 13
- 230000014759 maintenance of location Effects 0.000 description 10
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 9
- 239000003063 flame retardant Substances 0.000 description 9
- 229920002577 polybenzoxazole Polymers 0.000 description 9
- 239000000203 mixture Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 229920003235 aromatic polyamide Polymers 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000004043 dyeing Methods 0.000 description 6
- 239000002904 solvent Substances 0.000 description 5
- 239000002759 woven fabric Substances 0.000 description 5
- 229920000106 Liquid crystal polymer Polymers 0.000 description 4
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000004760 aramid Substances 0.000 description 4
- 229920000137 polyphosphoric acid Polymers 0.000 description 4
- 229920000784 Nomex Polymers 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229920001400 block copolymer Polymers 0.000 description 3
- 239000004763 nomex Substances 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 229920001407 Modal (textile) Polymers 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000007380 fibre production Methods 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229940098779 methanesulfonic acid Drugs 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000002964 rayon Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 210000002268 wool Anatomy 0.000 description 2
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 1
- 229920003368 Kevlar® 29 Polymers 0.000 description 1
- 239000004976 Lyotropic liquid crystal Substances 0.000 description 1
- 238000009960 carding Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 229930003836 cresol Natural products 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000904 poly(2,6-benzothiazole) Polymers 0.000 description 1
- -1 polymetaphenylene isophthalamide Polymers 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Artificial Filaments (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Woven Fabrics (AREA)
Description
【０００１】
【産業上の利用分野】
本発明は、耐炎性に優れた布帛に関し、さらに詳細には火災による危険が予測される産業分野や消防分野で使用される衣料に有用な布帛に関するものである。
【０００２】
【従来の技術】
火災などの危険から身を守る衣料素材としては、多くの難燃繊維からなる布帛が実用化されている。従来から使用されている難燃処理された綿、ウール、アクリル、レーヨンなどに加え、メタアラミド繊維はその優れた性能から広く用いられている。また特開平１−２２１５３７号公報にあるように、メタアラミド繊維に少量のパラアラミド繊維を混合し、接炎時の穴あき特性を改良する試みも行われている。
【０００３】
【発明が解決しようとする課題】
上記のようにメタアラミド繊維に少量のパラアラミド繊維を混合し、接炎時の穴あきに対する改良は成功しているが、接炎後の該布帛は強度低下が大きく、火災などにおける避難時に身体を防御する意味では不満足なものであった。
本発明はかかる従来技術の現状に鑑み創案されたものであり、その目的とするところは接炎後の強度低下が小さく、しかも着色による審美性・着心地に優れた耐炎性布帛を提供することにある。
【０００４】
【課題を解決するための手段】
本発明者は上記目的を達成するために特に接炎後の強度低下を極力抑える素材について鋭意検討した結果、本発明の完成に至った。
即ち、本発明は、メタアラミド繊維とポリベンザゾール繊維の混紡糸からなる布帛であって、メタアラミド繊維とポリベンザゾール繊維の混合率が重量比で９７／３〜８０／２０であることを特徴とする耐炎性に優れた布帛である。
【０００５】
ポリベンザゾール繊維とはポリベンザゾール（ＰＢＺ）ポリマーからなる繊維をいう。ポリベンザゾール（ＰＢＺ）とは、ポリベンゾオキサゾール（ＰＢＯ）ホモポリマー、ポリベンゾチアゾール（ＰＢＴ）ホモポリマー及びそれらＰＢＯ、ＰＢＴのランダム、シーケンシャルあるいはブロック共重合ポリマーをいう。ここでポリベンゾオキサゾール、ポリベンゾチアゾール及びそれらのランダム、シーケンシャルあるいはブロック共重合ポリマーは、例えば Wolfe らの「 Liquid Crystalline Polymer Compositions ，Process and Products 」米国特許第４７０３１０３号（１９８７年１０月２７日）、「 Liquid Crystalline Polymer Compositions ，Process and Products 」米国特許第４５３３６９２号（１９８５年８月６日）、「 Liquid Crystalline Poly（２，６− Benzothiazole ）Compositions，Process and Products 」米国特許第４５３３７２４号（１９８５年８月６日）、「 Liquid Crystalline Polymer Compositions ，Process and Products 」米国特許第４５３３６９３号（１９８５年８月６日）、Evers らの「 Thermooxidatively Stable Articulated ｐ− Benzobisoxazole and ｐ− Benzobisthiazole Polymers 」米国特許第４３５９５６７（１９８２年１１月１６日）、Tsaiらの「 Method for making Heterocyclic Block Copolymer 」米国特許第４５７８４３２号（１９８６年３月２５日）などに記載されている。
【０００６】
ＰＢＺポリマーに含まれる構造単位としては、好ましくはライオトロピック液晶ポリマーから選択される。
本発明で使用するＰＢＺポリマーは好ましくは、本質的に下記構造式（ａ）−（ｈ）から選択されるモノマー単位からなり、さらに好ましくは、本質的に構造式（ａ）−（ｃ）から選択されたモノマー単位からなる。
【０００７】
【化１】
【化２】
【化３】
【化４】
【化５】
【化６】
【化７】
【化８】
ＰＢＺポリマーのドープを形成するための好適な溶媒としては、クレゾールやそのポリマーを溶解し得る非酸化性の酸が含まれる。好適な酸溶媒の例としては、ポリ燐酸、メタンスルホン酸及び高濃度の硫酸あるいはそれらの混合物が挙げられる。さらに適する溶媒はポリ燐酸及びメタンスルホン酸である。また最も適する溶媒はポリ燐酸である。
【００１６】
溶液のポリマー濃度は紡糸性や生産性の点から好ましくは少なくとも７重量％であり、さらに好ましくは少なくとも１０重量％であり、最も好ましくは少なくとも１４重量％である。最大濃度は、例えばポリマーの溶解性やドープ粘度といった実際上の取扱い性により限定される。それらの限界要因のために、ポリマー濃度は通常では２０重量％を越えることはない。
【００１７】
本発明に好適なポリマーやコポリマーあるいはドープは公知の手法により合成される。例えば Wolfe らの米国特許第４５３３６９３号（１９８５年８月６日）、 Sybert らの米国特許４７７２６７８号（１９８８年９月２０日) 、 Harris らの米国特許第４８４７３５０号（１９８９年７月１１日）に記載される方法で合成される。ＰＢＺポリマーは、 Gregory らの米国特許第５０８９５９１号（１９９２年２月１８日）によると、脱水性の酸溶媒中での比較的高温、高せい断条件下において高反応速度での高分子量化が可能である。
【００１８】
本発明において使用する着色可能な難燃繊維とは、繊維製造工程においていわゆる原着といわれる手法で染料、顔料を用いて着色される繊維、あるいは繊維製造工程後に各種染料により着色可能な繊維でかつＬＯＩ値が２５以上の繊維をいう。たとえば難燃性を付与した綿、ウールなどの天然繊維、難燃性を付与したアクリル、レーヨン繊維、芳香族ポリアミド繊維などを指す。芳香族ポリアミド繊維とは、基本構造がポリメタフェニレンイソフタルアミド重合体からなる一般にメタアラミド繊維と呼ばれているものであり共重合やブレンドにより改良されていてもよく、たとえば特開昭５５−２１４０６号公報、特開昭５５−２１４０６号公報あるいは特開昭５５−２９５１６号公報に記載されているような芳香族ポリアミドポリマーが混合されていてもよい。具体的にはノーメックス（デュポン）、コーネックス（帝人）、アピエール（ユニチカ）、ケルメル（鐘紡）などの商標の繊維として知られている。
【００１９】
本発明における着色可能な難燃繊維とポリベンザゾール繊維の混紡糸は公知の手法で得られる。たとえば、カーディング前に混合する方法、スライバーにしてから混合する方法などがある。上記混紡糸の混合率は着色可能な難燃繊維とポリベンザゾール繊維を重量比で９７／３〜８０／２０とする必要がある。ポリベンザゾール繊維の混合割合が３重量％未満では接炎後の強度保持率が小さく目的の性能の布帛とならない。またポリベンザゾール繊維の混合割合が２０重量％を越えると、着色可能な難燃繊維を着色した場合も目的の色調が得られない。また布帛としての風合いが低下し、着心地などに問題を生じる。
【００２０】
得られた混紡糸は、各種の組織の織物、編物に加工され、耐炎性に優れた布帛として目的の分野に使用される。その組織は使用目的により選択されるものであり、特に限定されない。布帛の目付は好ましくは１００ｇ／ｍ2 以上であり、さらに好ましくは２００ｇ／ｍ2 以上である。
【００２１】
本発明の布帛は接炎後の強度保持率が大きい点に特徴を示すものである。具体的にはＪＩＳ Ｌ １０９１繊維製品の燃焼性試験方法のＡ−４法（垂直法）により評価した炭化距離が２ｃｍ以下である。ＪＩＳに定められた炭化距離の測定は、接炎後の試料に一定荷重を付与し、試料下端から引き裂かれた距離で定義されるものであり、その距離が小さいほど接炎後の強度保持率が大きいといえる。
【００２２】
【実施例】
以下に実施例と比較例を示すが、本発明の主旨を越えない限り、これらに拘束されるものではない。
【００２３】
参考例 １〜３
極限粘度数３０ｄｌ／ｇのシス−ポリベンゾオキサゾールをポリ燐酸に１４重量％溶かした紡糸ドープを、０．２２ｍｍのオリフィス径を有する３３４孔数のノズルから、温度１６０℃、単孔吐出量０．１２２ｃｃで押し出した。ノズルから押し出された繊維状のドープは２２ｃｍのエアーギャップを通過し、その中で引っ張られて約２２℃に調整された凝固浴を通り、更に走行速度約２００ｍ／ｍｉｎで連続的に５対以上のローラーで水洗され、続いて一旦巻取られることなく乾燥し、紡績用の油剤を付与した後、巻取られた。得られた繊維の単糸繊維強度は４２ｇ／ｄ、単糸デニールは１．５ｄであった。得られた繊維を３００００デニールのトウに合糸した後、押し込み式クリンパで捲縮を付与し、ロータリーカッターで切断し繊維長４４ｍｍのポリベンゾオキサゾールステープルを得た。
【００２４】
得られたＰＢＯステープルとＬＯＩ値が３０である難燃ポリノジックステープル（商品名タフバン、東洋紡績（株）製）を混合率（重量比）を表１に示すように変化させて２０番手の混紡糸を製造した。得られた各混合率の混紡糸をそれぞれ用いて、目付２００ｇ／ｍ２を目標として平織り布帛を製織した。得られた布帛はＪＩＳ Ｌ １０９１繊維製品の燃焼性試験方法のＡ−４法（垂直法）による炭化距離から接炎後の強度保持率を評価した。また染色性は日本化薬（株）製 Ｋａｙａｎｃｉｏｎ Ｎａｖｙ Ｅ−ＣＭ６％ ｏｗｆと無水芒硝６７ｇ／ｌ、炭酸ソーダ２０ｇ／ｌを８０℃、６０分、浴比１：２０の条件下で染色加工し、見かけの染色ムラにより評価した。参考例１〜３はいずれも接炎後の強度保持率、染色性が優れていた。
【００２５】
実施例 １〜３
参考例１で得られたポリベンゾオキサゾールステープルとＬＯＩ値が２８であるメタアラミド繊維（商品名ノーメックス、デュポン社製）を混合率（重量比）を表１に示すように変化させて２０番手の混紡糸を製造した。得られた各混合率の混紡糸をそれぞれ用いて、目付２００ｇ／ｍ２を目標として平織り布帛を製織した。得られた布帛はＪＩＳ Ｌ １０９１繊維製品の燃焼性試験方法のＡ−４法（垂直法）による炭化距離から接炎後の強度保持率を評価した。実施例１〜３はいずれも接炎後の強度保持率が優れていた。
【００２６】
比較例 １〜３
参考例１で得られたポリベンゾオキサゾールステープルとＬＯＩ値が３０である難燃ポリノジックステープル（商品名タフバン、東洋紡績製）を混合率（重量比）を表１に示すように変化させて２０番手の混紡糸を製造した。得られた各混合率の混紡糸をそれぞれ用いて、目付２００ｇ／ｍ２を目標として平織り布帛を製織した。得られた布帛はＪＩＳ Ｌ １０９１繊維製品の燃焼性試験方法のＡ−４法（垂直法）による炭化距離から接炎後の強度保持率を評価した。また染色性は日本化薬（株）製 Ｋａｙａｃｉｏｎ Ｎａｖｙ Ｅ−ＣＭ６％ ｏｗｆと無水芒硝６７ｇ／ｌ、炭酸ソーダ２０ｇ／ｌを８０℃、６０分、浴比１：２０の条件下で染色加工し、見かけの染色ムラにより評価した。
【００２７】
比較例１、２ではポリベンザゾール繊維の混合率が少なすぎるために接炎後の炭化距離が非常に大きい。また比較例３ではポリベンザゾール繊維の混合率が多すぎるために、染色ムラが大きく審美性にかける。
【００２８】
比較例 ４、５
ＬＯＩ値が２８であるメタアラミド繊維（商品名ノーメックス、デュポン社製）とパラアラミド繊維（商品名ケブラー２９、デュポン社製）のステープルを表１に示すように変化させて２０番手の混紡糸を製造した。得られた各混紡糸をそれぞれ用いて、目付２００ｇ／ｍ2 を目標として平織り布帛を製織した。得られた布帛はＪＩＳ Ｌ １０９１繊維製品の燃焼性試験方法のＡ−４法（垂直法）による炭化距離から接炎後の強度保持率を評価した。比較例４、５はポリベンザゾール繊維を含有していないために炭化距離が非常に大きい。
【００２９】
【表１】
【発明の効果】
本発明の布帛は特定の混合率（重量比）の着色可能な難燃繊維とポリベンザゾール繊維の混紡糸から構成されるので、接炎後の強度保持率が大きく、しかも着色による審美性、着心地に優れた耐炎性布帛が得られる。[0001]
[Industrial application fields]
The present invention relates to a fabric excellent in flame resistance, and more particularly to a fabric useful for clothing used in the industrial field and the fire-fighting field where danger from fire is predicted.
[0002]
[Prior art]
Fabrics made of many flame retardant fibers have been put to practical use as clothing materials that protect themselves from dangers such as fire. In addition to conventionally used flame-retardant cotton, wool, acrylic, rayon, etc., meta-aramid fibers are widely used because of their excellent performance. In addition, as disclosed in JP-A-1-221537, an attempt has been made to improve the perforation characteristics at the time of flame contact by mixing a small amount of para-aramid fiber with meta-aramid fiber.
[0003]
[Problems to be solved by the invention]
As described above, a small amount of para-aramid fiber is mixed with meta-aramid fiber, and the improvement of perforation at the time of flame contact has been succeeded. However, the fabric after flame contact has a great decrease in strength and protects the body during evacuation in a fire etc. In that sense, it was unsatisfactory.
The present invention was devised in view of the current state of the prior art, and an object of the present invention is to provide a flame-resistant fabric that has a small decrease in strength after flame contact and is excellent in aesthetics and comfort by coloring. It is in.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the present inventor has intensively studied a material that suppresses a decrease in strength after flame contact as much as possible. As a result, the present invention has been completed.
That is, the present invention is a fabric comprising a mixed yarn of meta-aramid fiber and polybenzazole fiber, wherein the mixing ratio of meta-aramid fiber and polybenzazole fiber is 97/3 to 80/20 by weight. It is a fabric excellent in flame resistance.
[0005]
Polybenzazole fiber refers to a fiber made of a polybenzazole (PBZ) polymer. Polybenzazole (PBZ) refers to polybenzoxazole (PBO) homopolymer, polybenzothiazole (PBT) homopolymer, and random, sequential or block copolymer of PBO and PBT. Here, polybenzoxazole, polybenzothiazole and their random, sequential or block copolymer are disclosed in, for example, Wolfe et al., “Liquid Crystalline Polymer Compositions, Process and Products” US Pat. No. 4,703,103 (October 27, 1987), “Liquid Crystalline Polymer Compositions, Process and Products” US Pat. No. 4,533,692 (August 6, 1985), “Liquid Crystalline Poly (2,6-Benzothiazole) Compositions, Process and Products” US Pat. No. 4,533,724 (1985 8) “Liquid Crystalline Polymer Compositions, Process and Products”, US Pat. No. 4,533,693 (August 6, 1985), Evers et al., “Thermooxidatively Stable Articulated p-Benzobisoxazole and p-Benzobisthiazole Polymers” November 1982 6 days), it has been described, for example, to Tsai et al., "Method for making Heterocyclic Block Copolymer" US Patent No. 4,578,432 (March 25, 1986).
[0006]
The structural unit contained in the PBZ polymer is preferably selected from lyotropic liquid crystal polymers.
The PBZ polymer used in the present invention preferably consists essentially of monomer units selected from the following structural formulas (a)-(h), more preferably from the structural formulas (a)-(c). Consists of selected monomer units.
[0007]
[Chemical 1]
[Chemical formula 2]
[Chemical 3]
[Formula 4]
[Chemical formula 5]
[Chemical 6]
[Chemical 7]
[Chemical 8]
Suitable solvents for forming the PBZ polymer dope include cresol and a non-oxidizing acid capable of dissolving the polymer. Examples of suitable acid solvents include polyphosphoric acid, methanesulfonic acid and high concentrations of sulfuric acid or mixtures thereof. Further suitable solvents are polyphosphoric acid and methanesulfonic acid. The most suitable solvent is polyphosphoric acid.
[0016]
The polymer concentration of the solution is preferably at least 7% by weight from the viewpoint of spinnability and productivity, more preferably at least 10% by weight, and most preferably at least 14% by weight. The maximum concentration is limited by practical handling properties such as polymer solubility and dope viscosity. Due to their limiting factors, the polymer concentration usually does not exceed 20% by weight.
[0017]
The polymer, copolymer or dope suitable for the present invention is synthesized by a known method. For example, Wolfe et al. US Pat. No. 4,533,693 (August 6, 1985), Sybert et al. US Pat. No. 4,772,678 (September 20, 1988), Harris et al. US Pat. No. 4,847,350 (July 11, 1989). It is synthesized by the method described in 1. According to Gregory et al., US Pat. No. 5,089,591 (February 18, 1992), PBZ polymers have a high molecular weight at a high reaction rate under relatively high temperature and high shear conditions in a dehydrating acid solvent. Is possible.
[0018]
The colorable flame retardant fiber used in the present invention is a fiber that is colored with a dye, a pigment by a technique called so-called “priming” in the fiber production process, or a fiber that can be colored with various dyes after the fiber production process, and A fiber having a LOI value of 25 or more. For example, it refers to natural fibers such as cotton and wool imparted with flame retardancy, acrylic, rayon fiber and aromatic polyamide fiber imparted with flame retardancy. The aromatic polyamide fiber is generally called a meta-aramid fiber whose basic structure is made of a polymetaphenylene isophthalamide polymer, and may be improved by copolymerization or blending. For example, JP-A-55-21406 An aromatic polyamide polymer as described in JP-A No. 55-21406 or JP-A No. 55-29516 may be mixed. Specifically, it is known as a trademark fiber such as Nomex (DuPont), Conex (Teijin), Appier (Unitika), Kermer (Kanebo).
[0019]
The blended yarn of the colorable flame retardant fiber and the polybenzazole fiber in the present invention can be obtained by a known method. For example, there are a method of mixing before carding and a method of mixing after sliver. The mixing ratio of the blended yarn is required to be 97/3 to 80/20 in weight ratio between the colorable flame retardant fiber and the polybenzazole fiber. When the mixing ratio of the polybenzazole fiber is less than 3% by weight, the strength retention after flame contact is small and the fabric having the desired performance cannot be obtained. On the other hand, when the mixing ratio of the polybenzazole fiber exceeds 20% by weight, the target color tone cannot be obtained even when the flame retardant fiber is colored. In addition, the texture as a fabric is lowered, causing problems in comfort and the like.
[0020]
The obtained blended yarn is processed into woven fabrics and knitted fabrics having various structures, and is used in a target field as a fabric excellent in flame resistance. The tissue is selected according to the purpose of use and is not particularly limited. The basis weight of the fabric is preferably 100 g / m 2 or more, and more preferably 200 g / m 2 or more.
[0021]
The fabric of the present invention is characterized by a high strength retention after flame contact. Specifically, the carbonization distance evaluated by the A-4 method (vertical method) of the flammability test method for JIS L 1091 fiber products is 2 cm or less. The measurement of the carbonization distance specified in JIS is defined as the distance to which a constant load is applied to the sample after flame contact and is torn from the lower end of the sample. The smaller the distance, the strength retention rate after flame contact Can be said to be large.
[0022]
【Example】
Examples and Comparative Examples are shown below, but are not limited to these unless they exceed the gist of the present invention.
[0023]
Reference examples 1-3
A spinning dope obtained by dissolving 14% by weight of cis-polybenzoxazole having an intrinsic viscosity of 30 dl / g in polyphosphoric acid was supplied from a nozzle having a orifice number of 0.22 mm and a number of holes of 334 with a temperature of 160 ° C. and a single hole discharge amount of 0. Extruded at 122 cc. The fibrous dope extruded from the nozzle passes through the air gap of 22 cm, passes through the coagulation bath adjusted to about 22 ° C. by being pulled therein, and continuously at least 5 pairs at a traveling speed of about 200 m / min. The film was washed with water and then dried without being wound once, and after being applied with a spinning oil, it was wound. The obtained fiber had a single yarn fiber strength of 42 g / d and a single yarn denier of 1.5 d. The obtained fiber was combined with a 30000 denier tow, crimped with a push-in crimper, and cut with a rotary cutter to obtain a polybenzoxazole staple having a fiber length of 44 mm.
[0024]
The obtained PBO staple and a flame-retardant polynosic staple having a LOI value of 30 (trade name: Toughban, manufactured by Toyobo Co., Ltd.) were mixed at a mixing ratio (weight ratio) as shown in Table 1, and the 20th blended yarn Manufactured. A plain woven fabric was woven using each of the obtained blended yarns having various mixing ratios with a basis weight of 200 g / m 2 . The resulting fabric was evaluated for strength retention after flame contact from the carbonization distance according to the A-4 method (vertical method) of the flammability test method for JIS L 1091 fiber products. In addition, the dyeing property is made by Kaycation Navy E-CM 6% owf manufactured by Nippon Kayaku Co., Ltd., 67 g / l anhydrous sodium sulfate, and 20 g / l sodium carbonate at 80 ° C. for 60 minutes with a bath ratio of 1:20. Evaluation was based on apparent dyeing unevenness. All of Reference Examples 1 to 3 were excellent in strength retention after dyeing and dyeability.
[0025]
Examples 1-3
The polybenzoxazole staple obtained in Reference Example 1 and a meta-aramid fiber (trade name Nomex, manufactured by DuPont) having a LOI value of 28 were mixed at a mixing ratio (weight ratio) as shown in Table 1, and the 20th blend. Yarn was produced. A plain woven fabric was woven using each of the obtained blended yarns having various mixing ratios with a basis weight of 200 g / m 2 . The resulting fabric was evaluated for strength retention after flame contact from the carbonization distance according to the A-4 method (vertical method) of the flammability test method for JIS L 1091 fiber products. Examples 1-3 were all excellent in strength retention after flame contact.
[0026]
Comparative Examples 1-3
The polybenzoxazole staple obtained in Reference Example 1 and the flame-retardant polynosic staple (trade name Toughban, manufactured by Toyobo Co., Ltd.) having a LOI value of 30 were mixed at a mixing ratio (weight ratio) as shown in Table 1 and were 20th. Of blended yarn was produced. A plain woven fabric was woven using each of the obtained blended yarns having various mixing ratios with a basis weight of 200 g / m 2 . The resulting fabric was evaluated for strength retention after flame contact from the carbonization distance according to the A-4 method (vertical method) of the flammability test method for JIS L 1091 fiber products. In addition, the dyeing property is Kayacation Navy E-CM 6% owf manufactured by Nippon Kayaku Co., Ltd., 67 g / l anhydrous sodium sulfate, and 20 g / l sodium carbonate at 80 ° C. for 60 minutes with a bath ratio of 1:20. Evaluation was based on apparent dyeing unevenness.
[0027]
In Comparative Examples 1 and 2, since the mixing ratio of the polybenzazole fiber is too small, the carbonization distance after flame contact is very large. In Comparative Example 3, since the mixing ratio of the polybenzazole fiber is too large, the unevenness of dyeing is greatly applied to aesthetics.
[0028]
Comparative Examples 4 and 5
A 20th blend yarn was produced by changing the staple of meta-aramid fiber (trade name Nomex, manufactured by DuPont) having a LOI value of 28 and para-aramid fiber (trade name: Kevlar 29, manufactured by DuPont) as shown in Table 1. . A plain woven fabric was woven using each of the obtained blended yarns with a basis weight of 200 g / m 2 . The resulting fabric was evaluated for strength retention after flame contact from the carbonization distance according to the A-4 method (vertical method) of the flammability test method for JIS L 1091 fiber products. Since Comparative Examples 4 and 5 do not contain polybenzazole fiber, the carbonization distance is very large.
[0029]
[Table 1]
【The invention's effect】
Since the fabric of the present invention is composed of a blended yarn of a colorable flame retardant fiber and a polybenzazole fiber having a specific mixing ratio (weight ratio), it has a high strength retention after flame contact and is aesthetic by coloring. A flame resistant fabric excellent in comfort is obtained.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10309695A JP3666053B2 (en) | 1995-04-03 | 1995-04-03 | Fabric with excellent flame resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10309695A JP3666053B2 (en) | 1995-04-03 | 1995-04-03 | Fabric with excellent flame resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08269843A JPH08269843A (en) | 1996-10-15 |
| JP3666053B2 true JP3666053B2 (en) | 2005-06-29 |
Family
ID=14345109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10309695A Expired - Fee Related JP3666053B2 (en) | 1995-04-03 | 1995-04-03 | Fabric with excellent flame resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3666053B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469445A (en) * | 2013-09-10 | 2013-12-25 | 南通田野服装有限公司 | Production process of low-elasticity spandex single jersey |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5130473B2 (en) * | 2007-02-06 | 2013-01-30 | 東洋紡株式会社 | High-strength flame retardant fabric |
| JP6170814B2 (en) * | 2013-11-12 | 2017-07-26 | 帝人株式会社 | Fabrics and textile products |
| JP2021188143A (en) * | 2020-05-26 | 2021-12-13 | 帝人株式会社 | Double woven fabric and laminated flame-retardant cloth and fiber product |
| JP7505946B2 (en) * | 2020-09-15 | 2024-06-25 | 帝人株式会社 | Heat-resistant protective clothing |
| JP7553313B2 (en) * | 2020-10-13 | 2024-09-18 | 帝人株式会社 | Fabrics and Protective Products |
| JP2022090765A (en) * | 2020-12-08 | 2022-06-20 | 帝人株式会社 | Fabric and textile product |
-
1995
- 1995-04-03 JP JP10309695A patent/JP3666053B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469445A (en) * | 2013-09-10 | 2013-12-25 | 南通田野服装有限公司 | Production process of low-elasticity spandex single jersey |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08269843A (en) | 1996-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4988746A (en) | Flame resistant staple fiber blend | |
| KR880001030B1 (en) | Aromatic Polyamide Fibers and Their Stabilization Methods | |
| US6159601A (en) | Process for the manufacture of cellulosic fibers; and cellulosic fibers | |
| US20090252961A1 (en) | Core-sheath compounded yarn and a woven/knitted fabric having excellent covering property and abrasion resistance | |
| KR100808724B1 (en) | Fiber and its manufacturing method | |
| JP2009197361A (en) | Stretchable sheath-core conjugate yarn | |
| JP2002302837A (en) | Wholly aromatic polyamide fiber structure with improved dyeability | |
| JP3666053B2 (en) | Fabric with excellent flame resistance | |
| JP4759334B2 (en) | Totally aromatic polyamide fiber structure | |
| CN103314037A (en) | Flame resistant spun staple yarns made from blends of fibers derived from sulfonated polyoxadiazole polymers | |
| CN111183250A (en) | Knitted continuous filament lyocell fabric | |
| JP3296456B2 (en) | Heat and flame resistant fabric | |
| JP3743022B2 (en) | Heat and flame resistant composite fabric | |
| CN103261276A (en) | Sulfonated polyoxadiazole polymers | |
| JP2012154002A (en) | Meta-wholly aromatic polyamide fiber fabric | |
| JP6112683B2 (en) | Flame retardant spun short fiber yarns made from blends of fibers obtained from sulfonated naphthalene polyoxadiazole polymers | |
| JPH07189074A (en) | Heat-resistant and flameproof fabric | |
| US5624752A (en) | Spun yarn of polybenzazole fiber | |
| JP3301509B2 (en) | Heat and flame resistant fabric | |
| JP3509279B2 (en) | Fabric with excellent high-temperature wear resistance | |
| JP3362503B2 (en) | Crimped polybenzazole short fiber and method for producing the same | |
| JP2001172845A (en) | Heat-resistant and flame-retardant woven or knit fabric having excellent resistance to light | |
| JPH05295615A (en) | Pill-resistant acrylic acid fiber and its production | |
| JP2515260B2 (en) | Flame-retardant acrylic composite fiber | |
| JP2003221754A (en) | Flame and heat resistant fabric |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20041224 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050218 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20050315 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050328 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080415 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090415 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090415 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100415 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100415 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110415 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110415 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120415 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120415 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130415 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130415 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140415 Year of fee payment: 9 |
|
| LAPS | Cancellation because of no payment of annual fees |