JP2007023451A - Aromatic polyamide fiber structure, and method for producing aromatic polyamide fibers containing fine carbon particles - Google Patents
Aromatic polyamide fiber structure, and method for producing aromatic polyamide fibers containing fine carbon particles Download PDFInfo
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- 239000004760 aramid Substances 0.000 title claims abstract description 79
- 229920003235 aromatic polyamide Polymers 0.000 title claims abstract description 79
- 239000000835 fiber Substances 0.000 title claims abstract description 60
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000002245 particle Substances 0.000 title abstract description 3
- 238000000034 method Methods 0.000 claims abstract description 13
- FJQXCDYVZAHXNS-UHFFFAOYSA-N methadone hydrochloride Chemical compound Cl.C=1C=CC=CC=1C(CC(C)N(C)C)(C(=O)CC)C1=CC=CC=C1 FJQXCDYVZAHXNS-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000010419 fine particle Substances 0.000 claims description 33
- 239000006185 dispersion Substances 0.000 claims description 13
- 238000009987 spinning Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 7
- LVGKZTVMAHRVFR-UHFFFAOYSA-N 4-(phenoxazine-10-carbonyl)benzamide Chemical compound C1=CC(C(=O)N)=CC=C1C(=O)N1C2=CC=CC=C2OC2=CC=CC=C21 LVGKZTVMAHRVFR-UHFFFAOYSA-N 0.000 claims description 2
- 238000002166 wet spinning Methods 0.000 claims description 2
- 230000003252 repetitive effect Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000006229 carbon black Substances 0.000 description 38
- 239000002904 solvent Substances 0.000 description 11
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 230000002776 aggregation Effects 0.000 description 7
- 125000003118 aryl group Chemical group 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 5
- 238000004220 aggregation Methods 0.000 description 4
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 3
- -1 polyparaphenylene terephthalamide Polymers 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- KDISMIMTGUMORD-UHFFFAOYSA-N 1-acetylpiperidine Chemical compound CC(=O)N1CCCCC1 KDISMIMTGUMORD-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 150000004985 diamines Chemical class 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000012770 industrial material Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- AVQQQNCBBIEMEU-UHFFFAOYSA-N 1,1,3,3-tetramethylurea Chemical compound CN(C)C(=O)N(C)C AVQQQNCBBIEMEU-UHFFFAOYSA-N 0.000 description 1
- CYSGHNMQYZDMIA-UHFFFAOYSA-N 1,3-Dimethyl-2-imidazolidinon Chemical compound CN1CCN(C)C1=O CYSGHNMQYZDMIA-UHFFFAOYSA-N 0.000 description 1
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 description 1
- ZFPGARUNNKGOBB-UHFFFAOYSA-N 1-Ethyl-2-pyrrolidinone Chemical compound CCN1CCCC1=O ZFPGARUNNKGOBB-UHFFFAOYSA-N 0.000 description 1
- YLHUPYSUKYAIBW-UHFFFAOYSA-N 1-acetylpyrrolidin-2-one Chemical compound CC(=O)N1CCCC1=O YLHUPYSUKYAIBW-UHFFFAOYSA-N 0.000 description 1
- LNWWQYYLZVZXKS-UHFFFAOYSA-N 1-pyrrolidin-1-ylethanone Chemical compound CC(=O)N1CCCC1 LNWWQYYLZVZXKS-UHFFFAOYSA-N 0.000 description 1
- DZLUPKIRNOCKJB-UHFFFAOYSA-N 2-methoxy-n,n-dimethylacetamide Chemical compound COCC(=O)N(C)C DZLUPKIRNOCKJB-UHFFFAOYSA-N 0.000 description 1
- ZBMISJGHVWNWTE-UHFFFAOYSA-N 3-(4-aminophenoxy)aniline Chemical compound C1=CC(N)=CC=C1OC1=CC=CC(N)=C1 ZBMISJGHVWNWTE-UHFFFAOYSA-N 0.000 description 1
- XMWRBQBLMFGWIX-UHFFFAOYSA-N C60 fullerene Chemical compound C12=C3C(C4=C56)=C7C8=C5C5=C9C%10=C6C6=C4C1=C1C4=C6C6=C%10C%10=C9C9=C%11C5=C8C5=C8C7=C3C3=C7C2=C1C1=C2C4=C6C4=C%10C6=C9C9=C%11C5=C5C8=C3C3=C7C1=C1C2=C4C6=C2C9=C5C3=C12 XMWRBQBLMFGWIX-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- ZWXPDGCFMMFNRW-UHFFFAOYSA-N N-methylcaprolactam Chemical compound CN1CCCCCC1=O ZWXPDGCFMMFNRW-UHFFFAOYSA-N 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000004984 aromatic diamines Chemical class 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 229960001760 dimethyl sulfoxide Drugs 0.000 description 1
- GUVUOGQBMYCBQP-UHFFFAOYSA-N dmpu Chemical compound CN1CCCN(C)C1=O GUVUOGQBMYCBQP-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910003472 fullerene Inorganic materials 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920006017 homo-polyamide Polymers 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- GXMIHVHJTLPVKL-UHFFFAOYSA-N n,n,2-trimethylpropanamide Chemical compound CC(C)C(=O)N(C)C GXMIHVHJTLPVKL-UHFFFAOYSA-N 0.000 description 1
- AOXCXILUIVQCHH-UHFFFAOYSA-N n,n,n',n'-tetramethylpropanediamide Chemical compound CN(C)C(=O)CC(=O)N(C)C AOXCXILUIVQCHH-UHFFFAOYSA-N 0.000 description 1
- AJFDBNQQDYLMJN-UHFFFAOYSA-N n,n-diethylacetamide Chemical compound CCN(CC)C(C)=O AJFDBNQQDYLMJN-UHFFFAOYSA-N 0.000 description 1
- VIJUZNJJLALGNJ-UHFFFAOYSA-N n,n-dimethylbutanamide Chemical compound CCCC(=O)N(C)C VIJUZNJJLALGNJ-UHFFFAOYSA-N 0.000 description 1
- MBHINSULENHCMF-UHFFFAOYSA-N n,n-dimethylpropanamide Chemical compound CCC(=O)N(C)C MBHINSULENHCMF-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- LXEJRKJRKIFVNY-UHFFFAOYSA-N terephthaloyl chloride Chemical compound ClC(=O)C1=CC=C(C(Cl)=O)C=C1 LXEJRKJRKIFVNY-UHFFFAOYSA-N 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004736 wide-angle X-ray diffraction Methods 0.000 description 1
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Abstract
Description
本発明は、カーボン微粒子を含有する芳香族ポリアミド繊維からなる繊維構造物に関する。さらに詳しくは、芳香族ポリアミド繊維からなる繊維構造物が、ＪＩＳ Ｚ８７２９に従って測定したＬ値が２４以下であり、該芳香族ポリアミド繊維構造物をＪＩＳ Ｌ １０９６に規定されるマーチンデール法により５，０００回摩耗させた後のＬ値が２５以下である芳香族ポリアミド繊維構造物に関する。 The present invention relates to a fiber structure composed of an aromatic polyamide fiber containing carbon fine particles. More specifically, the fiber structure comprising an aromatic polyamide fiber has an L value measured in accordance with JIS Z8729 of 24 or less, and the aromatic polyamide fiber structure is 5,000 by the Martindale method defined in JIS L 1096. The present invention relates to an aromatic polyamide fiber structure having an L value of 25 or less after repeated wear.
テレフタル酸成分と芳香族ジアミン成分とからなる芳香族ポリアミドは、その高強度、高弾性率および難燃性等の特性を生かして産業資材用途や機能性衣料用途に広く利用されている。しかし、耐光性および摩擦堅牢度が必ずしも満足のいくレベルではなく、繊維を日光暴露して使用する場合に繊維物性が劣化しやすく、また洗濯を繰り返すことにより、摩擦による繊維表面の白ボケという問題が起こり、耐光性と摩擦堅牢度が共に改善された芳香族ポリアミドの例は無い。 Aromatic polyamides composed of a terephthalic acid component and an aromatic diamine component are widely used in industrial material applications and functional clothing applications by taking advantage of their properties such as high strength, high elastic modulus and flame retardancy. However, the light resistance and the fastness to friction are not always satisfactory, and the fiber properties are likely to deteriorate when the fiber is exposed to sunlight, and the fiber surface is blurred due to friction due to repeated washing. There are no examples of aromatic polyamides in which both light resistance and friction fastness are improved.
従来技術としては、種々、開示されているが、カーボンブラックを添加した芳香族ポリアミド繊維が最も一般的であり、耐光性および摩擦堅牢度を改善するためには、カーボン微粒子を凝集させることなく、高濃度に添加する必要がある。カーボンブラックを含有する芳香族ポリアミドに関して、特許文献１（特開昭６４−８５３１６号公報）や、特許文献２（特開平６−８１２１１号公報）などに記載がある。これらは、耐光性改善を狙ったもので、摩擦堅牢度に関しては全く記載されていない。また、上記特許文献１（特開昭６４−８５３１６号公報）には、カーボンブラックを３重量％以上添加するとカーボンブラックの凝集により物性が低下する傾向にあると記載されている。さらに、特許文献２（特開平６−８１２１１号公報）においても、高濃度に添加した際に引張強度が約５０％も低下している例が記載されており、カーボンブラックを凝集させることなく添加する方法が必要となる。
上記のように、カーボンブラックを凝集させることなく高濃度に含むことにより耐光性が改善され、かつ摩擦堅牢度に優れた香族ポリアミドが望まれていた。
As described above, there has been a demand for an aromatic polyamide having improved light resistance and excellent friction fastness by containing carbon black in a high concentration without agglomeration.
本発明は、このような従来技術の問題を背景になされたもので、その目的とするところは、カーボンブラックを添加することにより、耐光性が改善され、かつ摩擦堅牢度が向上した芳香族ポリアミド繊維構造物を提供することにある。 The present invention has been made against the background of such problems of the prior art. The object of the present invention is to add an aromatic polyamide whose light resistance is improved and friction fastness is improved by adding carbon black. It is to provide a fiber structure.
本発明は、カーボン微粒子を含有する芳香族ポリアミド繊維からなる繊維構造物であって、ＪＩＳ Ｚ８７２９に従って測定したＬ値が２４以下であり、かつ該繊維構造物をＪＩＳ Ｌ １０９６に規定されるマーチンデール法により５，０００回摩耗させた後のＬ値が２５以下であることを特徴とする芳香族ポリアミド繊維構造物に関する。 The present invention relates to a fiber structure comprising an aromatic polyamide fiber containing carbon fine particles, the L value measured according to JIS Z8729 is 24 or less, and the fiber structure is Martindale defined in JIS L 1096 The present invention relates to an aromatic polyamide fiber structure having an L value of 25 or less after 5,000 wears by the method.
本発明によれば、カーボンブラックを添加することにより、耐光性が改善され、かつ摩擦堅牢度が向上した芳香族ポリアミド繊維構造物が得られる。 According to the present invention, an aromatic polyamide fiber structure with improved light resistance and improved friction fastness can be obtained by adding carbon black.
以下、本発明の実施の形態について詳細に説明する。
本発明で用いカーボンブラック微粒子としては、特に限定されるものではないが、例えば、平均粒径が１０〜５０μｍの範囲、ＢＥＴ表面積が５０〜３５０ｍ２／ｇ、ＡＳＴＭ Ｄ２４１４−６５Ｔに準じて測定したジブチルフタレート（ＤＢＰ）吸油量が５０ｍｌ／１００ｇ〜１５０ｍｌ／１００ｇの範囲であるものがより好ましく用いられる。
Hereinafter, embodiments of the present invention will be described in detail.
The carbon black fine particles used in the present invention are not particularly limited. For example, the average particle diameter is in the range of 10 to 50 μm, the BET surface area is 50 to 350 m 2 / g, and measured according to ASTM D2414-65T. Those having dibutyl phthalate (DBP) oil absorption in the range of 50 ml / 100 g to 150 ml / 100 g are more preferably used.
カーボンブラック微粒子の芳香族ポリアミド繊維中における含有量は、摩擦堅牢度および紡糸の安定性から、芳香族ポリアミドに対し、３〜１５重量％の範囲が好ましく、さらに好ましくは５〜１０重量％である。含有量が３重量％より低いとＪＩＳ Ｌ １０９６に規定されるマーチンデール法により５，０００回摩耗させた後のＬ値が２５以下を示さない。一方、含有量が１５重量％を超えるときには、紡糸時の糸切れが頻発し連続的な紡糸が不可能となり、また繊維の物性が著しく低下する。
なお、本発明では、上記カーボンブラック微粒子に加えて、Ｃ60やＣ70に代表されるフラーレンや、炭素六角網面が円筒状に閉じた単層構造あるいはこれらの円筒構造が入れ子状に配置された多層構造をしたカーボンナノチューブを必要に応じて添加することができる。
The content of the carbon black fine particles in the aromatic polyamide fiber is preferably in the range of 3 to 15% by weight, more preferably 5 to 10% by weight with respect to the aromatic polyamide, from the viewpoint of friction fastness and spinning stability. . When the content is lower than 3% by weight, the L value after 5,000 wears by the Martindale method specified in JIS L 1096 does not show 25 or less. On the other hand, when the content exceeds 15% by weight, yarn breakage during spinning frequently occurs, and continuous spinning becomes impossible, and the physical properties of the fiber are remarkably lowered.
In the present invention, in addition to the carbon black fine particles, fullerene represented by C 60 and C 70 , a single layer structure in which the carbon hexagonal mesh surface is closed in a cylindrical shape, or these cylindrical structures are arranged in a nested manner. Carbon nanotubes having a multi-layer structure can be added as necessary.
次に、本発明で用いる芳香族ポリアミドとは、ポリアミドを構成する繰り返し単位の８０モル％以上(好ましくは９０モル％以上)が、下記式(1)で表される芳香族ホモポリアミド、または、芳香族コポリアミドからなるものである。
−ＮＨＡｒ１ＮＨＣＯＡｒ２ＣＯ− ・・・（１）
ここで、Ａｒ１、Ａｒ２は芳香族基を表し、なかでも下記式(２)から選ばれた同一の、または相異なる芳香族基からなるものが好ましい。ただし、芳香族基の水素原子は、ハロゲン原子、低級アルキル基、フェニル基などで置換されていてもよい。
Next, the aromatic polyamide used in the present invention is an aromatic homopolyamide in which 80 mol% or more (preferably 90 mol% or more) of the repeating units constituting the polyamide is represented by the following formula (1), or It consists of an aromatic copolyamide.
-NHAr 1 NHCOAr 2 CO- (1)
Here, Ar 1 and Ar 2 represent an aromatic group, and among them, those composed of the same or different aromatic groups selected from the following formula (2) are preferable. However, the hydrogen atom of the aromatic group may be substituted with a halogen atom, a lower alkyl group, a phenyl group, or the like.
このような芳香族ポリアミドの製造方法や特性については、例えば、英国特許第１５０１９４８号明細書、米国特許第３７３３９６４号明細書、同第３７６７７５６号明細書、同第３８６９４２９号明細書、特開昭４９-１００３２２号公報、特開昭４７-１０８６３号公報、特開昭５８-１４４１５２号公報、特開平４-６５５１３号公報などに記載されており、具体的には、ポリパラフェニレンテレフタルアミド、コポリパラフェニレン・３，４'−オキシジフェニレン・テレフタルアミド、あるいはポリメタフェニレンイソフタルアミドなどが例示される。より好ましくは、コポリパラフェニレン・３，４'−オキシジフェニレン・テレフタルアミドである。 With respect to the production method and characteristics of such aromatic polyamides, for example, British Patent No. 1501948, US Pat. Nos. 3,733,964, 3,767,756, and 3,869,429, JP-A-4949 No.-100322, JP-A-47-10863, JP-A-58-144152, JP-A-4-65513 and the like. Specifically, polyparaphenylene terephthalamide, copolypara Examples include phenylene 3,4′-oxydiphenylene terephthalamide, polymetaphenylene isophthalamide, and the like. More preferred is copolyparaphenylene 3,4'-oxydiphenylene terephthalamide.
以上のカーボンブラック微粒子を含有する芳香族ポリアミド繊維を製造するには、上記芳香族ポリアミドを有機溶媒に溶解させて等方性のドープになし、例えばこれに同じ有機溶媒に高濃度に分散させたカーボンブラック微粒子を添加して湿式紡糸する。ここで、ドープは、芳香族ポリアミドが溶解している限り、溶液重合を行った後の有機溶媒ドープそのままでも、別途得られた芳香族ポリアミド を有機溶媒に溶解させたものでもよい。特に、溶液重合反応を行った後のそのままのものが好ましい。 In order to produce the aromatic polyamide fiber containing the above carbon black fine particles, the aromatic polyamide is dissolved in an organic solvent to form an isotropic dope, for example, it is dispersed in the same organic solvent at a high concentration. Carbon black fine particles are added and wet spinning is performed. Here, as long as the aromatic polyamide is dissolved, the dope may be an organic solvent dope after solution polymerization, or may be obtained by dissolving an aromatic polyamide obtained separately in an organic solvent. In particular, the one after the solution polymerization reaction is preferable.
この際、芳香族ポリアミドへ高濃度にカーボンブラックをブレンドする際は、カーボンブラックの凝集を抑制する必要がある。芳香族ポリアミド繊維用ドープを調製するに際し、その方法は特に限定されるものではないが、高濃度カーボン微粒子分散溶液を一定の圧力で注入し、ダイナミックミキジングおよび／またはスタティックミキシングする方法が好ましい。しかし、高濃度カーボン微粒子分散溶液では、カーボン微粒子が凝集しやすいという問題がある。上記高濃度カーボン微粒子分散溶液の凝集を抑制させるためには、芳香族ポリアミド溶液を少量添加することが効果的であることを見出した。すなわち、芳香族ポリアミド溶液と、カーボン微粒子の１００重量部に対して芳香族ポリアミドを１〜５重量部、含有するカーボン微粒子分散体とを混合する。芳香族ポリアミドがカーボン微粒子の１００重量部に対して１．０重量部未満の場合は、カーボン微粒子の凝集を抑制することが困難となる。一方、芳香族ポリアミドがカーボン微粒子の１００重量部に対して５．０重量部を超えると、該カーボン分散溶液の粘度が高くなり、配管輸送を必要とするプロセスでは取り扱いが困難となる。 At this time, when carbon black is blended with aromatic polyamide at a high concentration, it is necessary to suppress aggregation of carbon black. The method for preparing the dope for the aromatic polyamide fiber is not particularly limited, but a method of injecting a high-concentration carbon fine particle dispersion at a constant pressure to perform dynamic mixing and / or static mixing is preferable. However, the high concentration carbon fine particle dispersion solution has a problem that the carbon fine particles are easily aggregated. It has been found that it is effective to add a small amount of an aromatic polyamide solution in order to suppress aggregation of the high concentration carbon fine particle dispersion. That is, an aromatic polyamide solution and a carbon fine particle dispersion containing 1 to 5 parts by weight of aromatic polyamide with respect to 100 parts by weight of carbon fine particles are mixed. When the aromatic polyamide is less than 1.0 part by weight with respect to 100 parts by weight of the carbon fine particles, it becomes difficult to suppress the aggregation of the carbon fine particles. On the other hand, when the amount of the aromatic polyamide exceeds 5.0 parts by weight with respect to 100 parts by weight of the carbon fine particles, the viscosity of the carbon dispersion solution becomes high, and handling becomes difficult in a process that requires piping transportation.
ここで、重合溶媒あるいは有機の再溶解溶媒としては、一般に公知の非プロトン性有機極性溶媒を用いるが、例を挙げるとＮ−メチル−２−ピロリドン、Ｎ−エチル−２−ピロリドン、Ｎ，Ｎ−ジメチルホルムアミド、Ｎ，Ｎ−ジメチルアセトアミド、Ｎ，Ｎ−ジエチルアセトアミド、Ｎ，Ｎ−ジメチルプロピオンアミド、Ｎ，Ｎ−ジメチルブチルアミド、Ｎ，Ｎ−ジメチルイソブチルアミド、Ｎ−メチルカプロラクタム、Ｎ，Ｎ−ジメチルメトキシアセトアミド、Ｎ−アセチルピロリジン、Ｎ−アセチルピペリジン、Ｎ−メチルピペリドン−２、Ｎ，Ｎ’−ジメチルエチレン尿素、Ｎ，Ｎ’−ジメチルプロピレン尿素、Ｎ，Ｎ，Ｎ’，Ｎ’−テトラメチルマロンアミド、Ｎ−アセチルピロリドン、Ｎ，Ｎ，Ｎ’，Ｎ’−テトラメチル尿素、ジメチルスルホキシドなどである。 Here, as a polymerization solvent or an organic redissolving solvent, generally known aprotic organic polar solvents are used. For example, N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, N, N -Dimethylformamide, N, N-dimethylacetamide, N, N-diethylacetamide, N, N-dimethylpropionamide, N, N-dimethylbutyramide, N, N-dimethylisobutyramide, N-methylcaprolactam, N, N -Dimethylmethoxyacetamide, N-acetylpyrrolidine, N-acetylpiperidine, N-methylpiperidone-2, N, N'-dimethylethyleneurea, N, N'-dimethylpropyleneurea, N, N, N ', N'-tetra Methylmalonamide, N-acetylpyrrolidone, N, N, N ′, N′-tetramethylurea, And the like methyl sulfoxide.
本発明における芳香族ポリアミドの重合度は特に制限されないが、該ポリマーが溶媒に溶けるならば、成形加工性を損なわない範囲内で重合度は大きい方が好ましい。本発明の芳香族ポリアミドを溶液重合する場合、酸成分とジアミン成分の比は実質的に等モルで反応させるが、重合度制御のためいずれかの成分を過剰に用いることもできる。また、末端封鎖剤として単官能性の酸成分、アミン成分を使用しても良い。 The degree of polymerization of the aromatic polyamide in the present invention is not particularly limited. However, if the polymer is soluble in a solvent, it is preferable that the degree of polymerization is large as long as the moldability is not impaired. When the aromatic polyamide of the present invention is subjected to solution polymerization, the ratio of the acid component to the diamine component is reacted in substantially equimolar amounts, but either component can be used in excess for controlling the degree of polymerization. Moreover, you may use a monofunctional acid component and an amine component as a terminal blocker.
上記のごとくして得られる等方性のドープは、湿式紡糸される。この場合、該ドープを凝固浴の中に直接吐出しても良いし、あるいはエアギャップを設けてもよい。凝固浴は、芳香族ポリアミドの貧溶媒が用いられるが、芳香族ポリアミドドープの溶媒が急速に抜け出して芳香族ポリアミド繊維に欠陥ができないように、通常は良溶媒を添加して凝固速度を調節する。一般には、貧溶媒としては水、良溶媒としては芳香族ポリアミドドープ用の溶媒を用いるのが好ましい。良溶媒／貧溶媒の比は、芳香族ポリアミドの溶解性や凝固性にも依るが、１５／８５から４０／６０が一般的に好ましい。 The isotropic dope obtained as described above is wet-spun. In this case, the dope may be discharged directly into the coagulation bath, or an air gap may be provided. For the coagulation bath, a poor solvent for aromatic polyamide is used, but usually a good solvent is added to adjust the coagulation rate so that the aromatic polyamide dope solvent quickly escapes and the aromatic polyamide fiber is not defective. . In general, it is preferable to use water as the poor solvent and an aromatic polyamide dope solvent as the good solvent. The ratio of good solvent / poor solvent is generally preferably 15/85 to 40/60, although it depends on the solubility and coagulability of the aromatic polyamide.
得られた繊維は、この段階では充分に配向していないので、この後、熱延伸して広角Ｘ線回折より求めた結晶配向度が８９％以上、結晶化度が７４％以上と高度に配向および結晶化させることが好ましい。これより、結晶配向度、結晶化度のどちらか一方または両方が低い場合には、本発明の熱処理を施しても得られる繊維の機械的物性が不充分となりやすい。熱延伸の温度は、芳香族ポリアミドのポリマー骨格にもよるが、３００℃以上５５０℃以下であることが好ましく、また、延伸倍率は１０倍以上が好ましい。 Since the obtained fiber is not sufficiently oriented at this stage, the crystal orientation degree determined by wide-angle X-ray diffraction after hot drawing is 89% or more, and the degree of crystallinity is 74% or more. And it is preferably crystallized. Accordingly, when one or both of the degree of crystal orientation and the degree of crystallinity are low, the mechanical properties of the fiber obtained even when the heat treatment of the present invention is performed tend to be insufficient. The temperature of hot stretching depends on the polymer backbone of the aromatic polyamide, but is preferably 300 ° C. or higher and 550 ° C. or lower, and the draw ratio is preferably 10 times or higher.
かくして得られるカーボン微粒子含有芳香族ポリアミド繊維は、織物、編物、不織布などの布帛のほか、組紐、ロープ、撚糸コード、ヤーン、綿などの繊維構造物を構成する。 The carbon fiber-containing aromatic polyamide fiber thus obtained constitutes a fiber structure such as braid, rope, twisted cord, yarn, cotton, etc., in addition to fabric such as woven fabric, knitted fabric, and non-woven fabric.
本発明のカーボンブラック微粒子含有芳香族ポリアミド繊維構造物は、該繊維中にカーボンブラック微粒子が均一に分散されているため、ＪＩＳ Ｚ８７２９に従って測定したＬ値（以下「摩耗試験前Ｌ値」ともいう）が２４以下、かつ該繊維構造物をＪＩＳ Ｌ １０９６に規定されるマーチンデール法により５，０００回摩耗させた後のＬ値（以下「摩耗試験後Ｌ値」ともいう）が２５以下である。摩耗試験前Ｌ値、摩耗試験後Ｌ値が上限値を超えると、本発明の目的を達成することができなくなる。 The carbon black fine particle-containing aromatic polyamide fiber structure of the present invention has an L value measured in accordance with JIS Z8729 (hereinafter also referred to as “L value before wear test”) because the carbon black fine particles are uniformly dispersed in the fiber. Is 24 or less, and the L value after the fiber structure is worn 5,000 times by the Martindale method specified in JIS L 1096 (hereinafter also referred to as “L value after wear test”) is 25 or less. If the L value before the wear test and the L value after the wear test exceed the upper limit values, the object of the present invention cannot be achieved.
以下、実施例をあげて本発明をさらに具体的に説明する。なお、実施例において、％および部は重量基準である。
また、テストに使用したポリマー溶液（ドープ）の調製と、カーボンブラックのブレンド製糸は以下の方法によった。
Hereinafter, the present invention will be described more specifically with reference to examples. In the examples,% and parts are based on weight.
Moreover, the preparation of the polymer solution (dope) used for the test and the blending of carbon black were performed by the following method.
参考例（カーボンブラック微粒子含有芳香族ポリアミド繊維の製造方法）
＜ドープの調製＞
窒素を内部にフローしている錨形攪拌翼を有する混合槽に水分率約２０ｐｐｍのＮ−メチル−２−ピロリドン（以降「ＮＭＰ」と称す）２０５ Ｌを投入し、パラフェニレンジアミン２，７６４ｇと３，４′−ジアミノジフェニルエーテル ５，１１４ｇとを精秤して投入し溶解させた。このジアミン溶液に、その温度が３０℃、攪拌回転数が６４回／分の状態において、テレフタル酸クロライド １０，３２０ｇを精秤して投入した。溶液の温度が反応熱によって５３℃まで上昇したのち、６０分間加熱して８５℃とした。８５℃で、さらに１５分間攪拌を続けて溶液の粘度上昇が終了したことをもって重合反応終了とした。
この後、水酸化カルシウム２２．５％を含有するＮＭＰスラリー１６．８ｋｇを投入し、２０分間攪拌を続けてｐＨ５．４としたドープを、目開き３０ミクロンのフィルターで濾過してポリマー濃度６％のポリマー溶液（以降「ドープ」と称す）調製を完了した。
Reference example (Method for producing carbon polyamide fine particle-containing aromatic polyamide fiber)
<Preparation of dope>
205 L of N-methyl-2-pyrrolidone (hereinafter referred to as “NMP”) having a moisture content of about 20 ppm was charged into a mixing tank having a vertical stirring blade with nitrogen flowing therein, and 2,764 g of paraphenylenediamine was obtained. 5,114 g of 3,4′-diaminodiphenyl ether was precisely weighed and added to dissolve. To this diamine solution, 10,320 g of terephthalic acid chloride was precisely weighed and charged at a temperature of 30 ° C. and a stirring speed of 64 times / minute. After the temperature of the solution rose to 53 ° C. due to reaction heat, the solution was heated to 85 ° C. for 60 minutes. The stirring was further continued at 85 ° C. for 15 minutes, and the polymerization reaction was completed when the increase in the viscosity of the solution was completed.
Thereafter, 16.8 kg of NMP slurry containing 22.5% of calcium hydroxide was added, and the dope which was stirred for 20 minutes and adjusted to pH 5.4 was filtered through a 30 micron filter, and the polymer concentration was 6%. Preparation of a polymer solution (hereinafter referred to as “dope”) was completed.
＜カーボンブラックのブレンド製糸＞
紡糸ヘッドへ送液中の上記のドープに対して、カーボン微粒子の１００部に対して芳香族ポリアミドを所定部数（例えば、実施例１〜４では３部）含有するカーボンブラック２０％ＮＭＰ分散溶液を１０〜２０ｋｇ／ｃｍ２の圧力で定量圧入し、直ちにダイナミックミキシングを施し引き続いてスタティックミキサー２０段以上による十分な混合作用を与えた後、軽量ポンプを経てパック・紡糸ノズルより吐出後、ドライジェット紡糸で引き取り、凝固・乾燥・熱延伸・仕上げ油剤付与を経て製品を巻取った。
<Carbon black blend yarn>
A carbon black 20% NMP dispersion solution containing a predetermined number of aromatic polyamides (for example, 3 parts in Examples 1 to 4) with respect to 100 parts of carbon fine particles with respect to the dope being fed to the spinning head. After a constant amount of pressure is injected at a pressure of 10 to 20 kg / cm 2 , dynamic mixing is performed immediately, followed by sufficient mixing by 20 or more stages of a static mixer, discharge from a pack / spinning nozzle through a lightweight pump, and dry jet spinning. The product was wound up after solidification, drying, hot drawing, and finishing oil application.
実施例１〜４
実施例１〜４は、カーボンブラックの添加量を、芳香族ポリアミドに対して、３．０〜１３．０％となるように調整し、上記の方法で、芳香族ポリアミド繊維（コポリパラフェニレン・３．４’オキシジフェニレン・テレフタルアミド繊維）を得た。得られた繊維により作成した織布を用いて、ＪＩＳ Ｚ８７２９に従ってＬ値を測定するとともに、ＪＩＳ Ｌ１０９６に規定されるマーチンデール法により５，０００回摩耗させた後のＬ値摩耗試験後のＬ値を測定した。結果を表１に示す。
なお、得られた繊維の強度、モジュラスは、ＪＩＳ Ｌ１０１３により測定した。
Examples 1-4
In Examples 1 to 4, the amount of carbon black added was adjusted to 3.0 to 13.0% with respect to the aromatic polyamide, and the aromatic polyamide fiber (copolyparaphenylene · 3.4 ′ oxydiphenylene terephthalamide fiber) was obtained. Using the woven fabric prepared from the obtained fibers, the L value is measured according to JIS Z8729, and the L value after 5,000 wears by the Martindale method specified in JIS L1096. Was measured. The results are shown in Table 1.
The strength and modulus of the obtained fiber were measured according to JIS L1013.
比較例１〜４
比較例１では、カーボンブラック添加量を１％とした以外は、実施例１〜４と同様の方法で芳香族ポリアミド繊維を得た。
比較例２では、カーボンブラック添加量を２０％とした以外は、実施例１〜４と同様の方法で該芳香族ポリアミド繊維を得た。
比較例３では、芳香族ポリアミド繊維用ドープを調製するに際し、芳香族ポリアミド溶液と、カーボン微粒子の１００部に対して芳香族ポリアミドを０．５部含有するカーボン微粒子分散体を用いた。それ以外は、実施例１〜４と同様の方法で該芳香族ポリアミド繊維を得た。比較例４では、芳香族ポリアミド繊維用ドープを調製するに際し、芳香族ポリアミド溶液と、カーボン微粒子の１００部に対して芳香族ポリアミドを８部含有するカーボン微粒子分散体を用いた。それ以外は、実施例１〜４と同様の方法で該芳香族ポリアミド繊維を得た。
Comparative Examples 1-4
In Comparative Example 1, aromatic polyamide fibers were obtained in the same manner as in Examples 1 to 4 except that the amount of carbon black added was 1%.
In Comparative Example 2, the aromatic polyamide fiber was obtained in the same manner as in Examples 1 to 4 except that the amount of carbon black added was 20%.
In Comparative Example 3, when preparing an aromatic polyamide fiber dope, an aromatic polyamide solution and a carbon fine particle dispersion containing 0.5 part of aromatic polyamide with respect to 100 parts of carbon fine particles were used. Otherwise, the aromatic polyamide fiber was obtained in the same manner as in Examples 1 to 4. In Comparative Example 4, in preparing the aromatic polyamide fiber dope, an aromatic polyamide solution and a carbon fine particle dispersion containing 8 parts of aromatic polyamide per 100 parts of carbon fine particles were used. Otherwise, the aromatic polyamide fiber was obtained in the same manner as in Examples 1 to 4.
その結果、カーボンブラックを少量添加した系（比較例１）と比較して、実施例１〜４の何れの系でも、摩擦試験後のＬ値が２５以下となることが認められた。また、カーボンブラックの添加量としては、芳香族ポリアミドに対して１５％以下の場合には、添加量が多い程、白ボケ防止効果は優れる。
カーボンブラックを多量に添加した系（比較例２）では、紡糸延伸時の断糸が多発し、安定的に製糸することが困難であった。
カーボンブラック１００部に対して芳香族ポリアミドを０．５部含有するカーボンブラック分散体を用いた系（比較例３）では、カーボンブラック２０％ＮＭＰ分散溶液において、一部カーボンブラックの凝集を抑制することが出来ず、その結果、凝集体が存在することにより、紡糸および延伸工程で断糸が多発した。
一方、カーボンブラック１００部に対して芳香族ポリアミドを８部添加した系（比較例４）では、カーボンブラック２０％ＮＭＰ分散溶液の粘度が高くなり、配管輸送する供給ポンプの限界押出圧を超え、定量的に顔料を供給することができず、その結果、ドープの吐出量が一定とならず、紡糸安定性が低下した。
以上のように、カーボンブラック微粒子を、高濃度に、かつ凝集させることなく添加した芳香族ポリアミド繊維は、紡糸延伸安定性に優れ、カーボンブラックによる摩擦堅牢度の向上した繊維を得ることができる。
As a result, it was confirmed that the L value after the friction test was 25 or less in any of the systems of Examples 1 to 4, as compared with the system to which a small amount of carbon black was added (Comparative Example 1). Further, when the addition amount of carbon black is 15% or less with respect to the aromatic polyamide, the larger the addition amount, the better the white blur prevention effect.
In the system in which a large amount of carbon black was added (Comparative Example 2), yarn breakage occurred frequently during spinning drawing, and it was difficult to stably produce the yarn.
In a system using a carbon black dispersion containing 0.5 part of aromatic polyamide with respect to 100 parts of carbon black (Comparative Example 3), a part of the carbon black is prevented from agglomerating in the carbon black 20% NMP dispersion solution. As a result, the presence of agglomerates caused frequent yarn breaks in the spinning and drawing processes.
On the other hand, in a system in which 8 parts of aromatic polyamide is added to 100 parts of carbon black (Comparative Example 4), the viscosity of the 20% NMP dispersion of carbon black increases, exceeding the limit extrusion pressure of the supply pump that transports the pipe, The pigment could not be supplied quantitatively, and as a result, the discharge amount of the dope was not constant, and the spinning stability was lowered.
As described above, the aromatic polyamide fiber to which carbon black fine particles are added at a high concentration without agglomeration is excellent in spinning stretch stability, and a fiber having improved friction fastness due to carbon black can be obtained.
＊ ：芳香族族ポリアミド１００部に対するカーボンブラックの部数
＊＊ ：カーボンブラックＮＭＰ分散溶液中におけるカーボンブラック微粒子１００部に対する芳香族ポリアミドの部数
＊＊＊：紡糸および延伸工程において、断糸が０．３０回／錘・日 未満を良好、０．３０回／錘・日 以上を不良とした。
*: Number of parts of carbon black with respect to 100 parts of aromatic polyamide **: Number of parts of aromatic polyamide with respect to 100 parts of carbon black fine particles in carbon black NMP dispersion **: In the spinning and drawing processes, the number of broken yarns is 0.30 Less than times / weight / day was considered good, and 0.30 times / weight / day or more was considered bad.
本発明のカーボンブラック微粒子含有芳香族ポリアミド繊維構造物は、摩擦堅牢度が向上しているので、特に産業資材用途や機能性衣料用途に有用である。
Since the carbon black fine particle-containing aromatic polyamide fiber structure of the present invention has improved friction fastness, it is particularly useful for industrial materials and functional clothing.
Claims (5)
When the aromatic polyamide fiber constituting the aromatic polyamide fiber structure according to any one of claims 1 to 3 is produced by wet spinning, the aromatic polyamide solution and 100 parts by weight of the carbon fine particles contain 1 aromatic polyamide. A method for producing a carbon fine particle-containing aromatic polyamide fiber, comprising preparing a dope for spinning by mixing a carbon fine particle dispersion containing ˜5 parts by weight.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012031524A (en) * | 2010-07-28 | 2012-02-16 | Teijin Techno Products Ltd | Wholly-aromatic polyamide fiber structure |
| JP2015094043A (en) * | 2013-11-12 | 2015-05-18 | 帝人株式会社 | Fabric and fiber product |
| EP3385418A4 (en) * | 2015-12-02 | 2019-01-09 | Teijin Limited | Fabric and protective product |
| JP2020193421A (en) * | 2019-05-30 | 2020-12-03 | 帝人株式会社 | Para-type whole aromatic polyamide fiber yarn, and manufacturing method thereof |
-
2005
- 2005-07-21 JP JP2005210727A patent/JP2007023451A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012031524A (en) * | 2010-07-28 | 2012-02-16 | Teijin Techno Products Ltd | Wholly-aromatic polyamide fiber structure |
| JP2015094043A (en) * | 2013-11-12 | 2015-05-18 | 帝人株式会社 | Fabric and fiber product |
| EP3385418A4 (en) * | 2015-12-02 | 2019-01-09 | Teijin Limited | Fabric and protective product |
| US11118287B2 (en) | 2015-12-02 | 2021-09-14 | Teijin Limited | Fabric and protective product |
| JP2020193421A (en) * | 2019-05-30 | 2020-12-03 | 帝人株式会社 | Para-type whole aromatic polyamide fiber yarn, and manufacturing method thereof |
| JP7332346B2 (en) | 2019-05-30 | 2023-08-23 | 帝人株式会社 | Para-type wholly aromatic polyamide fiber yarn and method for producing the same |
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