WO2008004448A1 - Fibre conjuguée conductrice de structure à noyau gainé et son procédé de fabrication - Google Patents
Fibre conjuguée conductrice de structure à noyau gainé et son procédé de fabrication Download PDFInfo
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- WO2008004448A1 WO2008004448A1 PCT/JP2007/062507 JP2007062507W WO2008004448A1 WO 2008004448 A1 WO2008004448 A1 WO 2008004448A1 JP 2007062507 W JP2007062507 W JP 2007062507W WO 2008004448 A1 WO2008004448 A1 WO 2008004448A1
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- conductive
- fiber
- sheath
- core
- polymer
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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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
-
- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/09—Addition of substances to the spinning solution or to the melt for making electroconductive or anti-static filaments
-
- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
-
- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2922—Nonlinear [e.g., crimped, coiled, etc.]
- Y10T428/2924—Composite
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
- Y10T428/2931—Fibers or filaments nonconcentric [e.g., side-by-side or eccentric, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3146—Strand material is composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
- Y10T442/3154—Sheath-core multicomponent strand material
Definitions
- the present invention relates to a conductive core-sheath type composite fiber excellent in static elimination performance, in particular, a conductive core-sheath type composite fiber having static elimination performance excellent in fiber physical properties and practical wearing durability, and more preferably excellent in acid resistance. It is about synthetic fiber. More specifically, the conductive layer—a conductive layer (A) made of a thermoplastic polymer containing a predetermined amount of bon black fine particles and a protective layer (B) made of a fiber-forming thermoplastic polymer each have a sheath layer and a core layer.
- the present invention relates to an electrically conductive core-sheath type composite fiber made of the one formed. This conductive core-sheath type composite fiber has excellent static elimination performance even though it contains a relatively small amount of conductive carbon black fine particles. Therefore, it is suitable for the field of apparel such as clean norm wear and working wear.
- a conductive fiber is known in which a metal is plated on the surface of a non-conductive fiber.
- the plating layer on the surface may drop off during the weaving or weaving process or the subsequent process, or the plating layer may be formed during the dyeing process of the fabric. Since it is easy to dissolve and remove, there is a problem that the conductive performance is lowered.
- Metal fibers are generally high in cost and have poor spinnability, which can cause troubles in the weaving and dyeing processes, and washing when worn. It is easy to cause disconnection and drop-out due to, and has problems such as rustling.
- conductive carbon black fine particles are added to a thermoplastic polymer, and the fine particles are made to exist as a conductive layer on the surface or inside of the fiber so as to be continuous in the fiber length direction.
- a conductive composite fiber obtained by composite spinning of it and another fiber-forming thermoplastic polymer.
- conductive layer thermoplastic polymer
- conductive layer thermoplastic polymer
- a conductive layer in which a large amount of carbon black fine particles is kneaded can be easily used as a conductive product in the manufacturing process of a woven or knitted fabric with low adhesion to other polymers constituting the fiber. Interfacial peeling occurs, and the conductive layer becomes a single fiber, so that the conductive layer having a low strength and elongation is easily cut (for example, Japanese Patent Laid-Open No. 56-29611 is disclosed in Japanese Patent Laid-Open No. 58-92). No. 132119).
- the problems of the conventional conductive fibers are that the strength of the fibers themselves is low, that the conductive layer is easily cut, that satisfactory conductive performance cannot be obtained, and that the conductive layer is not obtained.
- the conventional conductive fibers are further inferior in acid resistance and durability.
- the invention mainly covers a polyester-based conductive layer mainly composed of a polyethylene terephthalate component and contains carbon black fine particles in the surface layer portion of the fiber cross section substantially on the entire surface of the fiber with a conductive layer.
- a polyester-based conductive layer mainly composed of a polyethylene terephthalate component and contains carbon black fine particles in the surface layer portion of the fiber cross section substantially on the entire surface of the fiber with a conductive layer.
- the present application has greatly improved the fiber performance and the conductive performance in the previous application in comparison with the conventional one, it is still unsatisfactory in the field where even better performance is required.
- the present invention is the above-mentioned invention in which the cross-sectional shape of the fiber has a specific cross section, whereby the initial performance and its durability are achieved to a higher degree, and higher performance is required. In use, the effect is superior to the invention of the earlier application.
- the object of the present invention is to achieve excellent static elimination performance that could not be achieved by the conventionally known conductive conjugate fibers, and even if it is worn for a long period of time, there is almost no decrease in static elimination performance.
- the conductive layer made of the thermoplastic polymer (A) containing conductive carbon black fine particles constitutes a sheath component
- the protective layer made of the fiber-forming thermoplastic polymer (B) is a core.
- Sheath component (conductive layer) / core (protective layer) [weight ratio] 10/90 to 35/65 (a)
- L is the interface length between the core component and the sheath component in the cross section of the composite fiber, and L is
- the conductive layer has 2 to 4 or 10 to 50 protrusions protruding toward the center of the fiber cross section.
- the conductive layer is formed.
- the thermoplastic polymer (A) is a polyester polymer having a melting point of 200 ° C or higher
- the thermoplastic polymer (B) constituting the protective layer is a polyester polymer having a melting point of 210 ° C or higher. This is a case where the difference in SP value [(calZcm 3 ) 1 , 2 ] between the polyester polymer constituting the protective layer and the polyester polymer constituting the protective layer is 1.1 or less.
- the thermoplastic polymer (A) constituting the conductive layer is a polybutylene terephthalate polyester
- the thermoplastic polymer (B) constituting the protective layer is a polyethylene terephthalate polyester
- the thermoplastic polymer (A) constituting the conductive layer is nylon 16-based polyamide
- the thermoplastic polymer (B) constituting the protective layer is nylon-66-based polyamide.
- a multifilament in which 3 to 10 conductive core-sheath composite fibers are bundled and the multifilament has a total fineness of 10 to 40 dtex is a preferred embodiment.
- a dust-proof garment comprising a woven fabric using the conductive core-sheath composite fiber as a part of warp or weft, wherein the conductive core-sheath composite fiber is spaced apart in the warp or weft direction of the fabric.
- a dust-proof garment driven in is also a preferred embodiment.
- the present invention relates to a protective polymer comprising a fiber-forming thermoplastic polymer (B), wherein the conductive layer of the thermoplastic polymer (A) containing conductive force-bon black fine particles constitutes a sheath component.
- the layer constitutes the core component, the ratio of (A) to the total weight of (A) and (B) is 10 to 35% by weight, and the interface length L between the core component and the sheath component in the cross section of the composite fiber And the same thickness as the core component
- the conductive core-sheath conjugate fiber of the present invention has excellent static elimination performance that could not be sufficiently achieved with a conventionally known conductive conjugate fiber, and has been worn for a long time.
- the performance with almost no decrease in static elimination performance is maintained over a long period of time, and the acid resistance is also excellent. Therefore, conventional conductive composite fibers can be used in the field of powerful dust-proof clothing that could not be used for applications, and in addition to that, work clothes and copies for fields that require prevention of static electricity generation. It can also be used for textiles for static neutralization brushes.
- FIG. 1 is a cross-sectional view of conductive core-sheath composite fibers of Examples:! To 4 and 8.
- FIG. 2 is a cross-sectional view of a conductive core-sheath composite fiber of Example 5.
- FIG. 3 is a cross-sectional view of a conductive core-sheath conjugate fiber of Example 6.
- FIG. 4 is a cross-sectional view of a conductive core-sheath composite fiber of Example 7.
- FIG. 5 is a cross-sectional view of a conductive conjugate fiber of Comparative Example 1.
- FIG. 6 is a cross-sectional view showing the definition of the size and dimensions of the protrusions in the conductive core-sheath conjugate fiber of the present invention.
- the conductive core-sheath type composite fiber is a conductive layer made of a thermoplastic polymer (A) containing conductive carbon black fine particles [hereinafter referred to as a conductive layer (A) or a certain layer. Is sometimes referred to as a conductive polymer layer (A). And a conductive layer—a protective layer comprising a fiber-forming thermoplastic polymer (B) substantially free of bon black fine particles [hereinafter referred to as a protective layer (B) or a protective polymer layer (B ).
- the conductive layer (A) forms a fiber sheath component
- the protective layer (B) forms a core component.
- the preferred content of the conductive force-bon black fine particles contained in the conductive layer (A) is 20 to 40% by weight, more preferably 25 to 38% by weight, and even more preferably. Is 25 to 35% by weight. If the content of the conductive carbon black fine particles is less than 20% by weight, the conductivity as intended by the present invention cannot be obtained, and sufficient static elimination performance cannot be achieved. On the other hand, if it exceeds 40% by weight, no further improvement in conductivity is observed, but rather the fluidity of the polymer containing conductive carbon black fine particles is drastically lowered and spinnability (fiber forming property). Becomes extremely worse.
- conductive force one carbon black fine particles used in the present invention it is intended to have a unique electrical resistance of 10 one 3 ⁇ 10 3 Q 'cm.
- the conductivity is generally insufficient, and when a chain structure called a structure is formed, the conductivity performance is improved and the conductive carbon black is improved. It becomes what is called fine particles. Therefore, when conducting a polymer with conductive carbon black fine particles, it is important to disperse the carbon black fine particles in the polymer without destroying the structure.
- the force that makes the structure easily broken by normal stretching S In the present invention, a special stretching method described later is used. Has a feature that is hardly destroyed. That is, the conventional general stretching method is a method of forcibly stretching due to the speed difference between the rollers. Therefore, the force that causes the fiber to be forcibly stretched and the structure to be cut is as in the present invention. In the case of a method in which the stretching is performed between the ones and the method is left to the free stretching of the fiber, an excessive tension is not applied to the fiber, so that the structure 1 is hardly cut.
- the electrical conduction mechanism of the composite containing the conductive force-bon black fine particles the force due to the contact of force-bon black and the tunnel effect are considered.
- the former is mainly considered. ing. Therefore, the chain of fine bon black fine particles is The longer the length, the higher the density, and the presence of fine bon black fine particles in the polymer, the higher the contact probability and the higher the conductivity.
- the polymer constituting the conductive layer (A) is appropriately crystallized and has a loose structure that allows the amorphous part to undergo molecular motion, As a result, the strength of the amorphous part increases and the electrical conductivity increases.
- the conductive layer is crystallized and the amorphous portion has molecular motion compared to the conductive conjugate fiber that has been subjected to normal stretching treatment. Since it is in a possible state, it is extremely excellent as a conductive conjugate fiber.
- the conductive core-sheath type composite fiber obtained by the special spinning and drawing method of the present invention can be obtained by using a conventional general drawing method (including a direct spinning drawing method) or a non-drawing conductive fiber. Unlike conductive fibers, the following formulas (d), (e), and (f) are satisfied with respect to breaking strength (DT), breaking elongation (DE), and contraction rate in 100 ° C hot water.
- the spinning / drawing method described later may be used. As a general tendency, the breaking strength is reduced. To increase the cutting speed, the cutting speed should be increased. To increase the breaking elongation, the cutting speed should be decreased. In order to further reduce the hot water shrinkage rate, the temperature of the heating zone may be increased.
- the polymer to which the conductive carbon black fine particles are added is of a polyester type
- the conductive force—the content of the Bonblack fine particles is less than 3 ⁇ 40% by weight.
- the conductivity rapidly increases, and when it exceeds 25% by weight, the conductivity is almost saturated.
- Conductive fibers are usually used in work clothes and dust proof clothing where explosion occurs due to the generation of static electricity. Washing was also repeated at the same time as bending, abrasion, etc., and as a result, the performance of the conductive layer of the conductive fiber inevitably deteriorated, and the static elimination performance as clothing had to be reduced. .
- the conductive layer is once cut by strain such as cracks, and it is difficult to repair if the continuity is lost. As a result, it is difficult to replace the work clothes and dust-proof clothes for a certain period of time, which is difficult to wear for a long time. It was the present situation that we did not get.
- the conductive core-sheath type composite fiber of the present invention is used, the performance is hardly deteriorated as compared with the conventional work clothes and dust-proof clothes using the conductive fiber, so that it can be worn for a long time.
- thermoplastic polymer constituting the conductive layer (A) satisfying the required performance examples include polyester resins and polyamide resins.
- polyester resins include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, naphthalene-1,6-dicarboxylic acid, 4,4'-dicarboxydiphenyl, 5_sodium sulfoisophthalic acid; Dicarboxylic acid components such as aliphatic dicarboxylic acids such as azelaic acid and sebacic acid, and fats such as ethylene glycol monoole, diethylene glycol mononole, propylene glycol mononore, 1,4_butanediol, polyethylene glycol, polytetramethylene glycol, etc.
- An aromatic dionole such as an ethylene oxide adduct of bisphenol A or bisphenol S; a fiber-forming polyester formed using a diol component such as an alicyclic diol such as cyclohexanedimethanol Can be mentioned.
- polyesters containing 80 mol% or more, especially 90 mol% or more of general-purpose polyester ethylene terephthalate units or butylene terephthalate units are preferred.
- a polybutylene terephthalate-based resin that is, a polyester-based resin containing 80 mol% or more of a butylene terephthalate unit, is easy to knead conductive carbon black fine particles and quickly crystallize, so that high conductive performance is obtained.
- This is preferable. Force that polyethylene terephthalate resin can be used Addition of a large amount of conductive carbon black fine particles results in a decrease in spinnability during melt spinning. For this reason, it is conceivable to use copolymerized polyethylene terephthalate to improve spinnability. However, when copolymerized polyethylene terephthalate is used, crystallinity generally decreases and conductivity performance decreases. .
- the polybutylene terephthalate resin which is a polyester resin that easily forms crystals, is particularly excellent.
- the melting point of the resin constituting the conductive layer (A) is preferably 200 ° C. or more from the viewpoint of practical durability. More preferably, it is a resin having a melting point of 210 ° C or higher and 250 ° C or lower, particularly a polyester resin.
- the polyamide polymer is not particularly limited as long as it is a polymer having an amide bond (CO—NH—) in the main chain.
- examples include aliphatic polyamides such as 4, 6-nylon, 6-nylon, 6, 6-nylon, 6, 10 nylon, 6, 12 nylon, 11-nylon, 12 nylon; nylon MXD6 (trade name "MX Nylon ”: manufactured by Mitsubishi Gas Chemical Co., Ltd.) and aromatic polyamides such as“ AREN ”(manufactured by Mitsui Chemicals, Inc.).
- Preferable examples include 6_nylon, 6, 6_nylon, 6,12 nylon, and 12 nylon.
- 6, 6 _ nylon and 12 nylon are more preferred because they have small dimensional changes due to water absorption and small changes in physical properties, and are excellent in stability during yarn making. These can be used alone or in combination of two or more.
- the dicarboxylic acid component and the diamine component are used, 60 mol% or more of the dicarboxylic acid component is an aromatic dicarboxylic acid, and 60 mol% or more of the diamine component is an aliphatic alkylene dialkyl having 6 to 12 carbon atoms.
- a thermoplastic semi-aromatic polyamide which is an amine can be used.
- aromatic dicarboxylic acids terephthalic acid is preferred from the viewpoint of heat resistance, and isophthalic acid, 2,6-naphthalenedicarboxylic acid, 2,7 naphthalene dicarboxylic acid, 1,4 naphthalenedicarboxylic acid.
- Aromatic dicarboxylic acids such as dicarboxylic acid and 4,4 ′ biphenyldicarboxylic acid can be used alone or in combination of two or more.
- the content of strong aromatic dicarboxylic acid is preferably 60 mol% or more of the dicarboxylic acid component, more preferably 75 mol% or more.
- dicarboxylic acid other than the aromatic dicarboxylic acid examples include malonic acid, dimethylmalonic acid, succinic acid, 3,3-jetylsuccinic acid, glutaric acid, 2,2-dimethyldaltaric acid, adipic acid, 2_ Aliphatic dicarboxylic acids such as methyladipic acid, trimethyladipic acid, pimelic acid, azelaic acid, sebacic acid and suberic acid; alicyclics such as 1,3-cyclopentanedicarboxylic acid and 1,4-cyclohexanedicarboxylic acid Dicarboxylic acids can be mentioned, and these acids can be used alone or in combination of two or more.
- Trimellitic acid, tri Polyvalent carboxylic acids such as mesic acid and pyromellitic acid can also be contained within the range where fiberization is easy.
- the dicarboxylic acid component is preferably 100% aromatic dicarboxylic acid in terms of fiber properties, heat resistance, and the like.
- the diamine component is composed of an aliphatic alkylenediamine having 6 to 12 carbon atoms.
- 1,9-nonanediamine alone or a combination of 1,9-nonanediamine and 2_methyl-1,8_octanediamine is preferable in terms of fiber properties and heat resistance.
- the content of the aliphatic alkylenediamine is preferably 60 mol% or more of the diamine component, more preferably 75 mol% or more, and particularly preferably 90 mol% or more.
- the diamines other than the above-mentioned aliphatic alkylene diamines having 6 to 12 carbon atoms include aliphatic diamines such as ethylenediamine, propylene diamine and 1,4 butane diamine; cyclohexane diamine and methylcyclohexane diamine.
- Cyclophoric diamines such as isophorone diamine, norbornane dimethyl enodiamine, tricyclodecane dimethyl diamine; p-phenylenediamine, m-phenylenediamine, xylylenediamine, 4, 4'-diaminodiphenylmethane 4,4, -diaminodiphenyl sulfone, 4,4, -diaminodiphenyl ether, and other aromatic diamines, or mixtures thereof. These may be used alone or in combination of two or more. Can do.
- conductive resin a resin in which bon black fine particles are kneaded at a high concentration is, for example. Even if the resin to be used has a sufficient fiber-forming property, the spinning property and drawability are insufficient, and it is difficult to fiberize alone. Therefore, the fiber forming process and the fiber physical properties are maintained by combining the conductive layer polymer (A) and the protective layer polymer (B).
- the weight ratio (conductive layer / protective layer) of the conductive layer (A) to the protective layer (B) is 10Z90 to 35Z65. If the conductive layer ( ⁇ ) of the sheath component containing force-bon black fine particles exceeds 35% by weight of the fiber weight, the spinnability at the time of spinning tends to decrease, and spinning and drawing yarns frequently occur. . From this, it is preferable that the ratio of the conductive layer ( ⁇ ) is 25% by weight or less, while the protective layer ( ⁇ ) of the core component occupies 65% by weight or more of the fiber weight.
- the proportion of the protective layer ( ⁇ ) is preferably 70% by weight or more. However, if the conductive layer is too small, a problem arises in terms of the continuity of the conductive layer. Therefore, the proportion of the conductive layer ( ⁇ ) is required to be 10% by weight or more, preferably 15% by weight. % Or more.
- the protective layer ( ⁇ ) is important for maintaining good processability during the fiberization of the present invention and for maintaining long-term durability performance without causing interfacial delamination with the conductive layer ( ⁇ ). Have a role to play.
- the polymer constituting the protective layer ( ⁇ ⁇ ) it is important to use a thermoplastic polymer capable of forming a fiber.
- a thermoplastic crystalline polymer having a melting point of 210 ° C. or higher is used for durability.
- a polymer having poor spinnability is basically unsuitable as the protective layer resin of the present invention.
- thermoplastic polymer constituting the protective layer (B) examples include terephthalic acid, isophthalanolic acid, naphthalene 2,6 dicarboxylic acid, 4,4'-dicarboxydiphenyl, and 5 sodium sulfoisophthalic acid.
- Dicarboxylic acid components such as azelaic acid, sebacic acid and the like, and ethylene glycol, diethylene glycol, propylene glycol, 1,4 butanediol, polyethylene glycol, polytetramethylene Aliphatic diols such as glycol; Aromatic diols such as ethylene oxide adducts of bisphenol A or bisphenol S; Diol components such as alicyclic diols such as cyclohexanedimethanol It is possible to mention the fiber-forming polyester formed by using
- ethylene terephthalate unit which is a general-purpose polyester, butylene terephthalate
- polyethylene terephthalate polyester is preferred in terms of fiberizing process properties, fiber properties and durability.
- a polyester having a melting point of 240 ° C or higher and 280 ° C or lower is preferable.
- a polyester polymer having a melting point of 10 to 50 ° C. higher than that of the polyester polymer or polyamide polymer constituting the conductive layer (A) is preferable as the protective layer polymer. Therefore, polybutylene terephthalate polyester is used as the thermoplastic polymer constituting the conductive layer (A), while polyethylene terephthalate polyester is used as the polymer constituting the protective layer (B). Is preferable.
- the polyamide resins include fats such as 4, 6_nylon, 6_nylon, 6, 6_nylon, 6, 10—nylon, 6, 12—nylon, 11—nylon, 12—nylon, etc.
- Preferable examples include 6-nylon, 6, 6-nylon, 6, 12-nylon, and 12-nylon.
- nylon-6-based polyamide is used as the thermoplastic polymer constituting the conductive layer (A), and nylon-as the polymer constituting the protective layer (B).
- a 6-series polyamide is used, and in this case, a conductive core-sheath type composite fiber excellent in both fiber physical properties and conductive performance can be obtained.
- a combination satisfying this condition is excellent in the physical properties of the fibers, in which both polymers have good adhesiveness and interface peeling hardly occurs.
- I ⁇ 1— ⁇ 2 I> 1.1 interfacial delamination is likely to occur and durability in practical use is difficult to obtain.
- polybutylene terephthalate polyester is used as the thermoplastic polymer constituting the conductive layer (A), while polyethylene terephthalate polyester is used as the polymer constituting the protective layer (B).
- this SP value difference is satisfied.
- nylon-6-based polyamide is used as the thermoplastic polymer constituting the conductive layer (A)
- nylon-66-based polyamide is used as the polymer constituting the protective layer (B)
- the present invention is also excellent.
- the SP value difference is satisfied. More preferably, the SP value difference is 0.8 or less.
- the cross-sectional shape of the conductive sheath-core composite fiber of the present invention is that the protective layer (B) occupies the inside of the fiber, and the conductive layer (A) covers the surface of the protective layer (B).
- ⁇ 100%, preferably a cross-sectional shape covering substantially the entire fiber surface (ie 100%), and it is important that the following formula (b) is satisfied.
- L is the interface length between the core component and the sheath component in the cross section of the composite fiber, and L is the circumference length of a perfect circle having the same cross-sectional area as the core component, respectively.
- L / L is preferably 1.06 or more, more preferably 1.1 or more.
- L / L is preferably 7.0 or less, more preferably 5.5 or less, and even more preferably.
- the sheath component conductive layer
- the conductive performance deteriorates, so it is important to satisfy the following formula (g).
- the fiber surface coverage of the sheath component is preferably 90% or more, more preferably 95% or more. On the other hand, the coverage is usually 100% or less.
- the conductive core-sheath composite fiber of the present invention there are two or more protrusions protruding toward the center of the conductive layer (coating layer) force fiber cross section
- particularly excellent results are obtained in terms of spinnability and conductive performance.
- the cross-sectional shape of FIG. 2 is a case where 30 protrusions are provided.
- the conductive performance represented by the resistance value is higher than that in the case where there are 2 to 4 protrusions as shown in FIG. It is superior to the 2-4 protrusions in this point that performance is difficult to lose.
- the number of protrusions is preferably 50 or less. Therefore, 2 to 4 protrusions are preferable in terms of resistance, and 10 to 50 protrusions are preferable in terms of conductive performance with respect to elongation. More preferably, there are a case where the number of protrusions is 3 ⁇ 4 and a case where there are 16-40.
- the ratio (x / R) of the length X of the protrusion in the fiber center direction to the outer diameter (diameter) R of the fiber is 0.05.
- the width of the protrusion (the length y of the protrusion in the direction perpendicular to the fiber center) is preferred in terms of electrical conductivity and fiber properties to be in the range of -0.35.
- the ratio of the length y of the protrusion in the direction perpendicular to the fiber center to the outer diameter (diameter) R (y / R) force is smaller than the length X of the protrusion (y / R) force 0.02-0 It is preferable to have a shape that extends in the range of 2, ie, in the direction of the fiber center.
- the ratio (xZR) is greater than 0.35, the protective layer is divided into a plurality of portions by the protrusions, and the force for protecting physical properties such as breaking strength by protecting the fibers as the protective layer decreases.
- the ratio (x / R) is shorter than 0.05, the effect of providing the protrusion is reduced.
- the size of the protrusions the plurality of protrusions are approximately the same size and are substantially the same. In the case of having one shape, it is preferable from the viewpoint of easy spinning.
- the conductive core-sheath composite fiber of the present invention has a filament electric resistance value of 5 x 10 5 ⁇ / cm to 5 x 10 9 Q / cm, preferably 5 10 5 0 /. 111 to 5 10 8 0 / (: 111. It is characterized by an abnormal discharge when the electrical resistance is less than 5 X 10 5 Q Zcm, and conductivity when it is greater than 5 X 10 9 Q / cm. Since performance is not expressed, it is not preferable.
- the filament electrical resistance value of the conductive core-sheath composite fiber of the present invention is mainly determined by the amount of conductive carbon black, the draw ratio, the temperature of the heating zone, and the thermoplastic weight constituting the conductive layer (A). It depends on the type of coalescence.
- the preferred polymer described above as the thermoplastic polymer constituting the conductive layer (A) can be obtained by reducing the scraping speed, increasing the temperature of the heating zone, increasing the amount of conductive force—bon black, or the like.
- the electrical resistance value can be lowered by selecting or the like.
- the single fiber fineness is less than 1.5 dtex, the spinning processability is unstable, and if it is more than 2 Odtex, the durability in actual use cannot be obtained as the fiber physical property.
- it is in the range of 2.0 to:! Odtex.
- the fiber-forming polymer forming the protective layer (B) contains inorganic fine particles other than conductive force-bon black, and has an average particle size of 0.01 to 1 ⁇ .
- the fine particles are preferably contained in a proportion of 0.05 to 10% by weight from the viewpoint of spinnability of the conductive fibers and further from the viewpoint of knitting. That is, when the content of the inorganic fine particles is less than 0.05% by weight, loops, fluff, fineness spots, etc. are likely to occur in the obtained conductive fiber. Cause thread. More preferably, the inorganic fine particles are contained in a proportion of 0.2 to 5% by weight.
- the kind of the inorganic fine particles contained in the polymer any one having substantially no deterioration effect and excellent in stability per se can be used.
- inorganic fine particles such as silica, alumina, titanium oxide, calcium carbonate, and barium sulfate can be used, and these can be used alone or in combination of two or more. Good.
- the average particle size of the inorganic fine particles is preferably 0.01 to 1 ⁇ m, more preferably 0.02 to 0.6 / im. If the average particle size is less than 0.01 ⁇ , loops, fluff, fineness spots, etc. will occur in the resulting fiber even if slight changes occur in the tension applied to the yarn during drawing.
- the average particle size here means a value obtained using a centrifugal sedimentation method.
- the method for adding the inorganic fine particles is not particularly limited, and it is possible to add and mix so that the inorganic fine particles are almost uniformly mixed in the polymer at an arbitrary stage until immediately before melt spinning of the polymer. Good.
- a melt spinning apparatus generally used for producing a sheath-core conjugate fiber is used.
- the positional relationship between the introduction hole for the conductive polymer and the introduction hole for the protective polymer in the distribution plate in the spinning device is determined. It is preferable to adjust or adjust the composite ratio of both polymers.
- the conductive layer made of the thermoplastic polymer (A) containing conductive carbon black fine particles constitutes a sheath component
- the protective layer made of the fiber-forming thermoplastic polymer (B) is a core component.
- the ratio of (A) to the total weight of (A) and (B) is 10 to 35% by weight, and the interface length L and the core component between the core component and the sheath component in the cross section of the composite fiber
- the ratio L / L to the circumferential length L of a perfect circle having the same cross-sectional area is
- the feature of the method of the present invention is that the melted and discharged composite polyester filament is once cooled and then heated and stretched using a heating zone such as a tube heater.
- the process from discharging to heating and stretching (after passing through the heating zone) is performed without substantially contacting the rollers and guides.
- the draw ratio of the conductive fibers is not automatically stretched between the rollers and between the guide and the rollers, but the draw ratio is automatically increased in the zone in the heating device. Therefore, the protective layer is sufficiently stretched to have high fiber properties because the conductive layer is stretched so that the conductive layer is cut and the stretching is performed.
- the conductive layer is stretched and crystallized, and its amorphous part is capable of molecular motion.
- the heating temperature at the time of heat stretching is preferably such that the conductive layer (A) constituting polymer and the protective layer (B) constituting polymer both have a glass transition temperature or higher and a melting point or lower.
- Breaking strength (DT) force When the strength is less than 1.8 cN / dt ex , the fiber becomes insufficiently stretched, and the conductivity is lowered due to insufficient crystallization of the conductive layer. On the other hand, if it exceeds 4.5 cNZdtex, the conductive core-sheath composite fiber is excessively stretched, and the conductive durability cannot be obtained.
- breaking strength is easily achieved by using the special spinning method described above. Preferably, it is 2.5 cN / dtex or more, and 4. OcN / dtex or less. In order to reduce the breaking strength, the cutting speed may be reduced.
- the breaking elongation can also be easily achieved by using a special spinning method as described above.
- the breaking elongation is preferably in the range of 60 to 80%. To reduce the breaking elongation, increase the cutting speed.
- the obtained conductive core-sheath composite fiber has a shrinkage rate in hot water at 100 ° C, that is, a boiling water shrinkage rate (Wsr) force that satisfies the following formula (f). is there.
- Boiling water shrinkage rate (Wsr) is 20% or less, so that dimensional stability is excellent and the conductive layer is difficult to cut. Preferably it is 15% or less.
- the conductive layer is likely to be cut in a later step, so 3% or more is preferable.
- Such boiling water shrinkage can be achieved by using the spinning method as described above and adjusting the length and temperature of the heating zone. That is, by increasing the length of the heating zone or increasing the temperature of the heating zone, the heat treatment further proceeds and the boiling water shrinkage rate decreases.
- the conductive fibers of the present invention spun and stretched in this manner are then supplied with an oiling device, and then further subjected to air entanglement using an interlacer or the like as necessary. Then, it is scraped off at a speed of 3000 m / min or higher, preferably at a speed of 3000 mZ to 4500 mZ.
- the upper limit of the take-up speed is preferably 5000 m / min or less from the viewpoint of passing through the drawing process. A more preferable cutting speed is in the range of 3500 to 4500 m / min.
- the oil agent used is mainly mineral oil and blended with an antistatic agent or the like. Things.
- the amount of oil applied to the fiber surface is in the range of 0.3 to 2% by weight based on the fiber weight.
- the cooling method of (2) above is that the temperature of the cooling air is about 20 to 30 ° C, the humidity of the cooling air is about 20 to 60%, and the blowing speed of the cooling air is 0.4 to lm. By setting it to about / sec, high-quality fibers can be obtained without causing fineness spots and performance spots.
- the length of the heating zone used in (3) above is preferably 0.6 m to 4 m, and the heating zone temperature is preferably 150 ° C. to 220 ° C. for uniform and smooth stretching. Normally, the heating zone in (3) above is installed so that the upper end of the heating zone is in the range of 1 to 2 m below the spinning nozzle.
- the single fiber fineness of the conductive core-sheath composite fiber of the present invention obtained by such a method is about 1.5 to 20 dtex.
- the conductive core-sheath composite fiber of the present invention is used in various forms and for various applications where static elimination is required.
- the conductive multifilament is mixed with the conductive multifilament of the present invention and the nonconductive multifilament, the conductive multifilament is the side yarn, and the nonconductive multifilament is the core yarn.
- 1-30% yarn length can be mixed and used so as to be long.
- Polyester-based multifilament is preferred as the core yarn.
- the total thickness of the non-conductive multifilament used as the core yarn is preferably in the range of 20 to 120 dtex.
- entanglement is generally applied so that the core yarn and the side yarn are not separated, and twist may be imparted to the blended yarn after imparting entanglement.
- a non-conductive multifilament may be used as a core yarn, and a conductive multifilament may be wound around the spiral.
- the thickness of the core yarn is the same as that of the above-mentioned mixed yarn, and the polyester multifilament is suitable as the core yarn.
- a multifilament using such a conductive sheath-core composite fiber is driven into a fabric such as a woven fabric or a knitted fabric as a part of a warp and / or a weft at a rate of 5 to 50 mm. As a result, the resulting woven or knitted fabric has a charge removal performance.
- Such woven and knitted fabrics are used for applications that require static elimination, such as dust-proof clothing worn in clean rooms, and workers engaged in chemical plants and workers handling chemicals.
- it can be used as a kingware for removing static electricity from workers engaged in workplaces that may explode due to static electricity.
- the conductive core-sheath type composite fiber of the present invention can be used as a part of the pile of the electricity removing pet and further with the electricity removing brush of the copying machine.
- Wsr (%) [(50-L / ) / 50] X 100
- B Strength retention rate 90% or more and less than 95%, change rate of electrical resistance value 1 or more and 2 or less
- C Strength retention rate 70% or more and less than 90%, electrical resistance value change rate 2 or more and 3 or less
- Rate of change in electrical resistance I log (R / R) I
- R is 0HL (unwashed) yarn resistance (Q / cm'f), R is 200HL after (after 200 washings)
- SP value Value calculated by p ⁇ GZM.
- G Cohesive energy constant of atoms and atomic groups
- the conductive polymer layer (A) uses a polybutylene terephthalate (PBT: melting point 225 ° C) containing 25% by weight of conductive force-bon black fine particles as a sheath component, and a protective polymer layer (B ) Uses polyethylene terephthalate (PET: melting point 255 ° C) containing 0.5% by weight of titanium oxide with an average particle size of 0.0 as the core component, composite ratio (sheath Z core) 18 82 (% by weight) ), There are two protrusions as shown in Fig. 1 toward the core of the sheath component force, and the composite fiber is spun in a core-sheath cross section where the entire fiber surface is covered with a conductive layer. A conductive composite multifilament with a total fineness of 22 dtex was obtained. The fineness of one conductive core-sheath type composite fiber was 2.8 dtex.
- the melt (A) and the melt (B) are merged, melted and discharged from a composite spinneret, and the discharged molten polymer is once cooled to a temperature below the glass transition point.
- run the inside of the heating device to draw and heat-treat, then apply oil, and scrape off at a speed of 4000 m / min, before the discharge yarn first contacts the roller or guide.
- the above stretching heat treatment was performed.
- cooling air of 25 ° C. was blown against the fibers immediately below Noznore at a speed of 0.4 m / sec.
- a heating tube having a diameter of 3 cm and a length of lm was provided at a position of 1.4 m immediately below the nozzle, and the inside of the tube was maintained at 175 ° C.
- the fiberization processability was good and no problem.
- Table 1 summarizes the composition of the conductive core-sheath composite fiber and the evaluation results of the fiber forming process. This conductive core-sheath type composite fiber was covered with a conductive layer over the entire surface.
- the conductive polymer layer (A) was continuously continuous in the fiber axis direction.
- the electrical resistance of the composite fiber when applied at 25 to 500 V is 2.4 X 10 7 Q / C m'f, which is very stable and has excellent electrical conductivity even under low applied voltage. It was a thing.
- the resulting fibers are knitted into a cylinder and the performance is 10 7 ⁇ 200 after 200 HL The cm'f level was good. The results are shown in Table 2.
- 1t) Z cotton 65735, cotton count 20SZ2 warp at a rate of 1 in 80 pieces to make a 2Z1 twill fabric of 80 pieces Zin, 50 pieces / in, and continue with normal polyester cotton Dyeing finishing was performed under the conditions of the mixed fabric.
- the surface resistance of the woven fabric was 10 7 ⁇ / cm.
- the surface resistance after wearing for 4 months and repeated washing 80 times in the meantime is 10 7 Q Zcm, has excellent static elimination performance, and the durability of the static elimination performance is also very good It was.
- Table 2 shows the results obtained.
- the value of log (R / R) ratio of Examples 1 to 8 in Table 2 is log (R / R) of each example.
- Examples 2 to 4 in Table 1 As the conductive polymer layer (A) and the protective polymer layer (B), the ones shown in Examples 2 to 4 in Table 1 were used, and the amounts of carbon black and fine particles added were changed to Examples 2 to 4 in Table 1.
- a conductive composite filament was prepared by fiberizing in the same manner as in Example 1 except that the core and the sheath were formed respectively, and the obtained fiber was subjected to performance evaluation. As a result, both the obtained conductive fiber and the fabric evaluation using this were good. Table 2 shows the results obtained.
- the single core fineness of the obtained conductive core-sheath conjugate fiber was 2.8 dtex.
- Ny6 represents nylon 6
- Ny66 represents nylon 6.6.
- Conductive composite filaments were obtained in the same manner as in Example 1 except that the spinneret parts for forming the cross-sectional shapes shown in FIGS. 2, 3 and 4 were used. The acid resistance and electrical performance were also good. Table 2 shows the evaluation results. In Examples 6 and 7, the fiber surface coverage of the conductive layer (A) was 92%, and the single fiber fineness was 2.8 dtex.
- Example 1 the conductive polymer layer (A) is used as the sheath component, and the conductive force—bon black fine Semi-aromatic polyamide containing 35% by weight of particles (PA9MT: diamine component is a mixture of 1,9-nonandiamine and 2-methyl-1,8-octanediamine in a molar ratio of 1: 1, dicarboxylic acid component is terephthalic acid. SP value: 11. 5) was used, and the protective polymer layer (B) was a polyethylene terephthalate containing 0.5% by weight of titanium oxide having an average particle size of 0.0 as a core component.
- composite spinning was performed to obtain a conductive composite multifilament composed of an aggregate of eight core-sheath composite filaments, with a total fineness of 22 dtex.
- the fineness of one conductive core-sheath composite fiber was 2.8 dtex.
- the obtained conductive multifilament was processed into a woven fabric in the same manner as in Example 1.
- Table 1 shows the performance of this conductive core-sheath composite fiber and fabric. Also in the case of this conductive core-sheath type composite fiber, the entire fiber surface was covered with the conductive layer.
- the conductive layer (A) and the protective polymer layer (B) form a sheath and a core, respectively, and form a cross section as shown in FIG. Except for using the above spinneret parts, they were made into fibers in the same manner as in Example 1 and subjected to performance evaluation. As a result, both the obtained conductive fiber and the fabric evaluation using the conductive fiber had lower performance than the fiber of the present invention. In particular, it was considerably inferior to the product of the present invention in terms of durability. Table 2 shows the results obtained. The obtained conductive fiber had a single fiber fineness of 2 ⁇ 8 dtex.
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Description
Claims
Priority Applications (6)
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AT07767333T ATE478180T1 (de) | 2006-07-03 | 2007-06-21 | Leitende hülle-kern-konjugatfaser und herstellungsverfahren dafür |
CN2007800252068A CN101484621B (zh) | 2006-07-03 | 2007-06-21 | 导电性皮芯型复合纤维及其制造方法 |
US12/307,147 US7824769B2 (en) | 2006-07-03 | 2007-06-21 | Conductive sheath-core conjugate fiber and process for producing the same |
DE200760008568 DE602007008568D1 (de) | 2006-07-03 | 2007-06-21 | Leitende hülle-kern-konjugatfaser und herstellungsverfahren dafür |
JP2008523643A JP4902652B2 (ja) | 2006-07-03 | 2007-06-21 | 導電性芯鞘型複合繊維及びその製造方法 |
EP20070767333 EP2037015B1 (en) | 2006-07-03 | 2007-06-21 | Conductive sheath-core conjugate fiber and process for producing the same |
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PCT/JP2007/062507 WO2008004448A1 (fr) | 2006-07-03 | 2007-06-21 | Fibre conjuguée conductrice de structure à noyau gainé et son procédé de fabrication |
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US (1) | US7824769B2 (ja) |
EP (1) | EP2037015B1 (ja) |
JP (1) | JP4902652B2 (ja) |
CN (1) | CN101484621B (ja) |
AT (1) | ATE478180T1 (ja) |
DE (1) | DE602007008568D1 (ja) |
TW (1) | TWI395848B (ja) |
WO (1) | WO2008004448A1 (ja) |
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JP2015161050A (ja) * | 2014-02-28 | 2015-09-07 | 株式会社クラレ | 導電性複合繊維 |
KR20180079288A (ko) * | 2015-11-10 | 2018-07-10 | 도레이 카부시키가이샤 | 흡습성, 주름방지성이 우수한 심초 복합 단면섬유 |
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KR102575877B1 (ko) | 2015-11-10 | 2023-09-07 | 도레이 카부시키가이샤 | 흡습성, 주름방지성이 우수한 심초 복합 단면섬유 |
JP2020165044A (ja) * | 2019-03-29 | 2020-10-08 | 日本エステル株式会社 | 導電性複合繊維、およびその製造方法 |
JP7535284B2 (ja) | 2019-03-29 | 2024-08-16 | 日本エステル株式会社 | 導電性複合繊維、およびその製造方法 |
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TWI395848B (zh) | 2013-05-11 |
US7824769B2 (en) | 2010-11-02 |
DE602007008568D1 (de) | 2010-09-30 |
CN101484621B (zh) | 2012-01-11 |
EP2037015A4 (en) | 2009-07-15 |
JPWO2008004448A1 (ja) | 2009-12-03 |
EP2037015A1 (en) | 2009-03-18 |
US20090318049A1 (en) | 2009-12-24 |
JP4902652B2 (ja) | 2012-03-21 |
EP2037015B1 (en) | 2010-08-18 |
ATE478180T1 (de) | 2010-09-15 |
TW200819566A (en) | 2008-05-01 |
CN101484621A (zh) | 2009-07-15 |
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