JP7480507B2 - アクチュエータ用繊維、並びにそれを用いたアクチュエータおよび繊維製品 - Google Patents
アクチュエータ用繊維、並びにそれを用いたアクチュエータおよび繊維製品 Download PDFInfo
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- JP7480507B2 JP7480507B2 JP2019569862A JP2019569862A JP7480507B2 JP 7480507 B2 JP7480507 B2 JP 7480507B2 JP 2019569862 A JP2019569862 A JP 2019569862A JP 2019569862 A JP2019569862 A JP 2019569862A JP 7480507 B2 JP7480507 B2 JP 7480507B2
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- fiber
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- nylon
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- 229940105990 diglycerin Drugs 0.000 description 1
- GPLRAVKSCUXZTP-UHFFFAOYSA-N diglycerol Chemical compound OCC(O)COCC(O)CO GPLRAVKSCUXZTP-UHFFFAOYSA-N 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- GWZCCUDJHOGOSO-UHFFFAOYSA-N diphenic acid Chemical compound OC(=O)C1=CC=CC=C1C1=CC=CC=C1C(O)=O GWZCCUDJHOGOSO-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- 125000004494 ethyl ester group Chemical group 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- XLYMOEINVGRTEX-UHFFFAOYSA-N fumaric acid monoethyl ester Natural products CCOC(=O)C=CC(O)=O XLYMOEINVGRTEX-UHFFFAOYSA-N 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
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- 229920001519 homopolymer Polymers 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- FSQQTNAZHBEJLS-UPHRSURJSA-N maleamic acid Chemical compound NC(=O)\C=C/C(O)=O FSQQTNAZHBEJLS-UPHRSURJSA-N 0.000 description 1
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- HEBKCHPVOIAQTA-UHFFFAOYSA-N meso ribitol Natural products OCC(O)C(O)C(O)CO HEBKCHPVOIAQTA-UHFFFAOYSA-N 0.000 description 1
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- 150000004702 methyl esters Chemical class 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
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- NXPPAOGUKPJVDI-UHFFFAOYSA-N naphthalene-1,2-diol Chemical compound C1=CC=CC2=C(O)C(O)=CC=C21 NXPPAOGUKPJVDI-UHFFFAOYSA-N 0.000 description 1
- DFFZOPXDTCDZDP-UHFFFAOYSA-N naphthalene-1,5-dicarboxylic acid Chemical compound C1=CC=C2C(C(=O)O)=CC=CC2=C1C(O)=O DFFZOPXDTCDZDP-UHFFFAOYSA-N 0.000 description 1
- RXOHFPCZGPKIRD-UHFFFAOYSA-N naphthalene-2,6-dicarboxylic acid Chemical compound C1=C(C(O)=O)C=CC2=CC(C(=O)O)=CC=C21 RXOHFPCZGPKIRD-UHFFFAOYSA-N 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- PFPYHYZFFJJQFD-UHFFFAOYSA-N oxalic anhydride Chemical compound O=C1OC1=O PFPYHYZFFJJQFD-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 229920000747 poly(lactic acid) Polymers 0.000 description 1
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- 229920000767 polyaniline Polymers 0.000 description 1
- 239000004631 polybutylene succinate Substances 0.000 description 1
- 229920002961 polybutylene succinate Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000921 polyethylene adipate Polymers 0.000 description 1
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- 239000004633 polyglycolic acid Substances 0.000 description 1
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- 229920005594 polymer fiber Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920000128 polypyrrole Polymers 0.000 description 1
- 229920000123 polythiophene Polymers 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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- 238000007142 ring opening reaction Methods 0.000 description 1
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- SONHXMAHPHADTF-UHFFFAOYSA-M sodium;2-methylprop-2-enoate Chemical compound [Na+].CC(=C)C([O-])=O SONHXMAHPHADTF-UHFFFAOYSA-M 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 235000010356 sorbitol Nutrition 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229940014800 succinic anhydride Drugs 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 description 1
- DXNCZXXFRKPEPY-UHFFFAOYSA-N tridecanedioic acid Chemical compound OC(=O)CCCCCCCCCCCC(O)=O DXNCZXXFRKPEPY-UHFFFAOYSA-N 0.000 description 1
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 239000000811 xylitol Substances 0.000 description 1
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 description 1
- 235000010447 xylitol Nutrition 0.000 description 1
- 229960002675 xylitol Drugs 0.000 description 1
Images
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- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/098—Melt spinning methods with simultaneous stretching
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
- F03G7/061—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element
- F03G7/0612—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element using polymers
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/08—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons
- D01F6/12—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons from polymers of fluorinated hydrocarbons
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
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- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
- F03G7/061—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element
- F03G7/0616—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element characterised by the material or the manufacturing process, e.g. the assembly
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- G01N25/4846—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation for a motionless, e.g. solid sample
- G01N25/4866—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation for a motionless, e.g. solid sample by using a differential method
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N10/00—Electric motors using thermal effects
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- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
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Description
(1)熱可塑性樹脂からなる繊維であって、コイルばね形状を有し、コイル部の平均直径をD、繊維直径をdとしたとき、ばね指数D/dが1.7以上であるアクチュエータ用繊維。
(2)示差走査熱量計により測定したガラス転移点が150℃以下である前記(1)に記載のアクチュエータ用繊維。
(3)示差走査熱量計により測定した融解熱量から算出した結晶化度が5~95%の範囲にある前記(1)または(2)に記載のアクチュエータ用繊維。
(4)複屈折Δnの絶対値が1.0×10-3~5.0×10-1の範囲にある前記(1)~(3)のいずれか一つに記載のアクチュエータ用繊維。
(5)前記熱可塑性樹脂がポリエステル、ナイロン6,10、ナイロン6,12、ナイロン10,10、ポリプロピレン、エチレンテトラフルオロエチレン、パーフルオロアルキルビニルエーテル共重合体、ポリフェニレンサルファイド、ポリエーテルエーテルケトン、ポリオキシメチレン、ポリウレタン、およびそれらの組み合わせから成る群から選択される前記(1)~(4)のいずれか一つに記載のアクチュエータ用繊維。
(6)熱可塑性樹脂がナイロン6,10、ナイロン6,12、ナイロン10,10およびそれらの組み合わせから成る群から選択される前記(1)~(5)のいずれか一つに記載のアクチュエータ用繊維。
(7)前記(1)~(6)のいずれか一つに記載のアクチュエータ用繊維が少なくとも一部を構成するアクチュエータ。
(8)前記(1)~(6)のいずれか一つに記載のアクチュエータ用繊維が少なくとも一部を構成する繊維製品。
結晶化度(%)={(融解熱量-結晶化熱量)/完全結晶融解熱量}×100
複屈折Δn=(レターデーション/繊維直径)×10-3
アクチュエータ用繊維の側面をキーエンス社製デジタルマイクロスコープVHX2000にて300倍の倍率で撮影した画像において、無作為に抽出したコイル部の10箇所について、図1中のdで示される撚り繊維4の幅の長さを測定し、その平均の小数点第2位を四捨五入して小数点第1位まで求めた値を繊維直径d(μm)とした。
アクチュエータ用繊維の側面をキーエンス社製デジタルマイクロスコープVHX2000にて300倍の倍率で撮影した画像において、無作為に抽出したコイル部の10箇所について、コイル部外径(μm)を測定し、その平均の小数点第2位を四捨五入して小数点第1位まで求めた値を平均コイル部外径D’(μm)とした。次いで、以下の式
コイル部の平均直径D(μm)=平均コイル部外径D’-繊維直径d
の通り、得られた平均コイル部外径D’の値から繊維直径dの値を差し引いた値をコイル部の平均直径D(μm)とした。
繊維直径dおよびコイル部の平均直径Dを用いて、以下の式
ばね指数D/d=コイル部の平均直径D/繊維直径d
より算出し、小数点第2位を四捨五入して、小数点第1位まで求めた値をばね指数D/dとした。
TA Instruments社製DSC2000を用いて、10℃/分の昇温条件で、20℃から融解ピーク(発熱ピーク)の終了時より約30℃高い温度の範囲で、アクチュエータ用繊維の示差走査熱量測定を行った。解析ソフトとして、TA Instruments製ユニバーサルアナリシス2000を使用して、測定で得られたDSCサーモグラムにおいて、Tg(℃)を求めた。
また、吸熱ピークから求めた熱量を結晶化熱量(J/g)とし、発熱ピークから求めた熱量を融解熱量(J/g)として、以下の式
結晶化度(%)={(融解熱量-結晶化熱量)/完全結晶融解熱量}×100
により、算出した値の小数点第1位を四捨五入して、整数とした値を結晶化度とした。なお、各種熱可塑性樹脂の完全結晶融解熱量(J/g)は、各実施例中に記載した値を用いた。
アクチュエータ用繊維のコイル部を切り出して、ベレック式コンペンセーターを備えたOLYMPUS BH-2偏光顕微鏡により、レターデーション(nm)を測定し、上記A項で求めた繊維直径d(μm)を用いて、以下の式
複屈折Δn=(レターデーション/繊維直径d)×10-3
により、複屈折Δnを求めた。コイル部の任意の5箇所について、測定を行い、その平均値を有効数字2桁となるように、3桁目を四捨五入して算出した値を複屈折Δnとした。
温度25.0℃、湿度60.0%RHに保たれた恒温恒湿室内にて、アクチュエータ用繊維を、その上端を固定した状態で吊るし、互いに隣り合う巻線が非接触の状態で、20MPaの張力がかかるように、以下の式
張力(MPa)=荷重×0.0098/繊維断面積
から算出した荷重(g)のおもりを、アクチュエータ用繊維の下端にかけた。なお、繊維断面積(mm2)は、繊維直径d(μm)を用いて算出した値である。
Pi(g)=2P1-P2
から初荷重Piを算出した。
伸縮動作率(%)={(L1-L2)/L1}×100
より伸縮動作率を算出した。
なお、アクチュエータ用繊維のTgが25℃未満の場合には、ヒートガンを用いて、95℃の熱風で加熱し、伸縮動作率を評価した。
前記F項に記載の方法で張力をかけたアクチュエータ繊維用の初期状態における繊維長L3(mm)を測定した。その後、前記F項に記載の方法で加熱放冷のサイクルを50回繰り返し、50回目の放冷が完了したときのサンプルの繊維長L4(mm)を測定した。これらの測定値を用い、以下の式
初期長変化率(%)=(|L3-L4|/L3)×100
より小数点第2位を四捨五入し、小数点第1位まで求めて初期長変化率を算出した。ここで、|L3-L4|は、加熱放冷50サイクル前の初期状態における繊維長と50サイクル後の初期状態における繊維長の差の絶対値を表している。算出した初期長変化率が5.0%未満の場合、合格とした。ちなみに、初期長変化率は小さければ小さいほど優れており、最小値は0.0%である。
実施例によって得られたアクチュエータ用繊維を、綿の平織物(英式綿番手40S:紡績糸、経・緯の織密度:各50本/インチ(2.54cm))の経糸10本に対して1本の割合で経糸として組み込み、縦・横が各10cmの平織物を作製した。続いて、綿製長袖ワイシャツの左右の袖の上腕部分を一周取り囲むように、得られた平織物を縫い付けた。平織物を縫い付ける際には、袖の向きとアクチュエータ用繊維の向きを一致させた。5年以上の着用試験評価の経験を有する被験者20名に対し、作製したワイシャツを着用させ、10分間歩行後に、柔軟性、追従性、圧迫感を下記のとおり評価した。
ポリエチレンテレフタレート(PET)樹脂(東レ株式会社製 T755M)を1軸型エクストルーダーに連続供給し、温度280℃で溶融押出した。押出された溶融ポリマーをギアポンプで計量して、紡糸パックへ送り込み、丸断面用紡糸口金から紡出した後、延伸することにより直径130.5μmのポリエチレンテレフタレート製モノフィラメントを作製した。
実施例1において熱可塑性樹脂を、実施例2ではナイロン6樹脂(東レ株式会社製“アミラン”ポリアミドCM1017、溶融押出温度:260℃)、実施例3ではナイロン6,6樹脂(東レ株式会社製“アミラン”ポリアミドCM3001-N、溶融押出温度:290℃)、実施例4ではナイロン6,10樹脂(東レ株式会社製“ アミラン”ポリアミドCM2001、溶融押出温度:270℃)、実施例5ではナイロン6,12樹脂(ダイセル・エボニック製“ベスタミド”D18、溶融押出温度:215℃)、実施例6ではナイロン10,10樹脂(ダイセル・エボニック製“ベスタミド”テラDS、溶融押出温度:250℃)、実施例7では高密度ポリエチレン(HDPE)樹脂(株式会社プライムポリマー製ハイゼックス5000SR、溶融押出温度:180℃)、実施例8では直鎖状低密度ポリエチレン(LLDPE)樹脂(株式会社プライムポリマー製ネオゼックス2015M、溶融押出温度:170℃)、実施例9ではポリプロピレン(PP)樹脂(日本ポリプロ株式会社製FY5、溶融押出温度:230℃)、実施例10ではポリフッ化ビニリデン(PVDF)樹脂(株式会社クレハ製KFポリマー#1100、溶融押出温度:230℃)に変更したこと以外は、実施例1に従い実施した。得られたアクチュエータ用繊維と着用試験の評価結果を表1に示す。なお、各実施例の熱可塑性樹脂における完全結晶融解熱量は、ナイロン6が229.8J/g、ナイロン6,6が255.4J/g、ナイロン6,10が253.9J/g、ナイロン6,12が258.0J/g、ナイロン10,10が244.0J/g、高密度ポリエチレンおよび直鎖状低密度ポリエチレンが286.7J/g、ポリプロピレンが209.0J/g、ポリフッ化ビニリデンが105.0J/gとした。
実施例1において、繊維直径dを表2に示すとおり変更したこと以外は、実施例1に従い実施した。得られたアクチュエータ用繊維と着用試験の評価結果を表2に示す。
比較例1、2では、ばね指数D/dが小さいため、アクチュエータ用繊維は硬いばねとなり、伸縮動作率も低い結果であった。着用試験においても、柔軟性、追従性、圧迫感のいずれも評価が低く、着用感に劣るものであった。
実施例4において、コイリング時の張力を表3に示すとおり変更したこと以外は、実施例4に従い実施した。得られたアクチュエータ用繊維と着用試験の評価結果を表3に示す。
比較例3、4では、ばね指数D/dが小さいため、アクチュエータ用繊維は硬いばねとなり、伸縮動作率も低い結果であった。着用試験においても、柔軟性、追従性、圧迫感のいずれも評価が低く、着用感に劣るものであった。
2 コイル部
3 端部
D コイル部の平均直径
D’ 平均コイル部外径
d 繊維直径
4 撚りの入った繊維(撚り繊維)
d’ 撚りの入った繊維の直径
5 撚りの入っていない繊維
d’’ 撚りの入っていない繊維の直径
6 結晶部
7 非晶部
Claims (6)
- 熱可塑性樹脂からなる繊維であって、コイルばね形状を有し、コイル部の平均直径をD、繊維直径をdとしたとき、ばね指数D/dが1.7以上であり、
前記熱可塑性樹脂がナイロン6,10、ナイロン6,12、ナイロン10,10およびそれらの組み合わせから成る群から選択されるアクチュエータ用繊維。 - 示差走査熱量計により測定したガラス転移点が150℃以下である請求項1に記載のアクチュエータ用繊維。
- 示差走査熱量計により測定した融解熱量から算出した結晶化度が5~95%の範囲にある請求項1または2に記載のアクチュエータ用繊維。
- 複屈折Δnの絶対値が1.0×10-3~5.0×10-1の範囲にある請求項1~3のいずれか一項に記載のアクチュエータ用繊維。
- 請求項1~4のいずれか一項に記載のアクチュエータ用繊維が少なくとも一部を構成するアクチュエータ。
- 請求項1~4のいずれか一項に記載のアクチュエータ用繊維が少なくとも一部を構成する繊維製品。
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