WO2017170823A1 - Core-sheath composite fiber, and woven material and fisheries tool using same - Google Patents

Core-sheath composite fiber, and woven material and fisheries tool using same Download PDF

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Publication number
WO2017170823A1
WO2017170823A1 PCT/JP2017/013150 JP2017013150W WO2017170823A1 WO 2017170823 A1 WO2017170823 A1 WO 2017170823A1 JP 2017013150 W JP2017013150 W JP 2017013150W WO 2017170823 A1 WO2017170823 A1 WO 2017170823A1
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Prior art keywords
sheath
core
composite fiber
anchor
thermoplastic resin
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PCT/JP2017/013150
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French (fr)
Japanese (ja)
Inventor
山本健雄
土岐美鈴
山本博之
柴田剛志
増田正人
Original Assignee
東レ・モノフィラメント株式会社
東レ株式会社
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Priority to JP2017528601A priority Critical patent/JPWO2017170823A1/en
Publication of WO2017170823A1 publication Critical patent/WO2017170823A1/en

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K91/00—Lines
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • 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
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00—Woven fabrics designed to make specified articles
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres

Definitions

  • the present invention relates to a core-sheath composite fiber provided with a sheath having a specific cross-sectional structure that is difficult to peel off, and a woven fabric and marine products using the same.
  • Composite fibers using different materials can have both the characteristics of the material of the core and the characteristics of the material of the sheath.
  • Patent Documents 1 to 3 For example, Patent Documents 1 to 3).
  • the core-sheath composite fiber can make use of the characteristics of the different materials used as described above, for example, the core material has physical characteristics such as strength and flexibility, and the sheath material is repelled.
  • the sheath material has physical characteristics such as strength and flexibility, and the sheath material is repelled.
  • chemical characteristics such as water resistance and chemical resistance
  • resins that can actually be combined are limited.
  • the sheath part for example, it is often desirable to use a resin having functionality such as heat resistance, water repellency, and chemical resistance.
  • the ratio of the sheath part to the core part should be kept as low as possible while keeping the high peel strength as described above. It is desirable to reduce the amount.
  • sea-island composite fibers including core-sheath composite fibers as described above have been proposed for producing island-island composite fibers that can form islands in various shapes and cross-sectional shapes of islands ( Patent Documents 4 to 6).
  • this proposed technique in the island-island composite fiber, it is possible to design the size and arrangement of the island part relative to the sea part, the cross-sectional shape, the arrangement density, etc. substantially freely, and therefore the core part in the core-sheath composite fiber.
  • the cross-sectional shape and the like of the sheath portion can be designed substantially freely, and can meet various requirements in various fields.
  • an object of the present invention is to focus on a recently proposed technique for manufacturing a composite fiber that can be designed substantially freely in cross-sectional form, and on the problems and requirements of conventional core-sheath composite fibers.
  • the core-sheath conjugate fiber according to the present invention is a core-sheath conjugate fiber in which the core part is made of the thermoplastic resin A and the sheath part is made of the thermoplastic resin B other than the thermoplastic resin A, In the cross section of the fiber, the sheath part has an anchor part extending into the core part, and the anchor part is formed in an undercut shape having a wider part than the root part. Consists of things.
  • the sheath part located around the core part has an anchor part extending into the core part, the sheath part is connected to the core part via the anchor part. It will be supported and the peeling strength with respect to the core part of a sheath part will be raised. And, when this anchor part is formed in an undercut shape having a wider part than its root part, the anchor part tries to be relatively displaced outward in the composite fiber radial direction with respect to the core part. Since the wide width portion is locked to the core portion and acts to prevent relative displacement of the anchor portion, the sheath portion can have extremely high peel strength through the anchor portion having the wide width portion.
  • the sheath part has a high peel strength with respect to the core part, even if the sheath part is thin, its presence is maintained without peeling around the core part, and when an expensive sheath material is used Even if it exists, it becomes possible to reduce the usage-amount of a sheath part raw material by making a sheath layer thin as a whole.
  • the anchor portion is configured to have at least a two-stage width structure of the wide portion and the narrow portion on the root portion side.
  • the wide portion can be more securely locked to the core portion with respect to the relative displacement with respect to the core portion, so that the function of preventing the peeling of the sheath portion by the anchor portion is enhanced, and the sheath portion is further peeled off. Realization of strength becomes possible.
  • the width of the wide part is preferably 1.5 times or more with respect to the narrow part on the base part side, More preferably, it is 1.8 times or more, More preferably, it is 2.0 times or more.
  • the width of the wide portion is 1.5 times or more, the peeling prevention function of the sheath portion by the anchor portion is further strengthened, and higher peeling strength of the sheath portion becomes possible.
  • a plurality of the anchor portions are arranged in the fiber circumferential direction of the sheath portion in the cross section of the composite fiber.
  • the area ratio of the sheath part in the cross section of the composite fiber is preferably 30% or less, more preferably 25% or less, and still more preferably 20% or less. .
  • the minimum of the area ratio of the sheath part in the cross section of a composite fiber is not specifically limited, 3% or more is preferable and 5% or more is more preferable.
  • the core-sheath conjugate fiber according to the present invention has a high peel strength at the sheath portion, the sheath portion can be prevented from being peeled even if the sheath portion is thinned. Therefore, especially when using an expensive material for the sheath, it is possible to reduce the amount of use, and it is possible to reduce the overall cost while imparting desired functionality to the core-sheath composite fiber. become.
  • the thermoplastic resin B can be formed of a higher characteristic resin than the thermoplastic resin A with respect to the function required for the sheath part.
  • the core portion mainly has physical properties such as strength and flexibility of the composite fiber, so that a general-purpose thermoplastic resin A, for example, polyamide represented by nylon 6 or nylon 66, polyethylene terephthalate, poly Thermoplastics that use resins such as butylene terephthalate, polyesters typified by polyethylene naphthalate, polyolefins typified by polyethylene, polyacetal, etc., and have superior properties with respect to the required functions, although they are relatively expensive.
  • Resin B for example, a resin such as fluorine resin represented by ethylene tetrafluoroethylene and polyvinylidene fluoride, polyphenylene sulfide, polyether ether ketone and the like can be used.
  • thermoplastic resins A and B additives such as pigments, dyes, light-proofing agents, ultraviolet absorbers, antioxidants, fluorescent brighteners, crystallization inhibitors, etc., as required, do not hinder the intended performance. In the range, it can be added to the core component and / or the sheath component in the polymerization step, after polymerization, or just before spinning.
  • a conductivity imparting agent such as carbon black or metal powder
  • a filler having a specific gravity different from that of the base material resin is added, it is possible to control the floating state of the yarn in water, and therefore, it is further suitable as a marine material.
  • thermoplastic resin B when the sheath is required to have water repellency, antifouling property, chemical resistance, etc., the thermoplastic resin B is preferably made of a fluororesin.
  • the thermoplastic resin B is preferably made of polyphenylene sulfide.
  • the fiber diameter of the core-sheath composite fiber is not particularly limited, but considering various practical uses, the fiber diameter may be in the range of 0.05 to 5 mm. Preferably, it is in the range of 0.1 to 3 mm.
  • the core-sheath composite fiber according to the present invention can be developed for various uses.
  • the present invention also provides a woven fabric using the core-sheath conjugate fiber according to the present invention as described above.
  • the core-sheath conjugate fiber according to the present invention is particularly suitable for industrial fabrics whose processing speed and use speed have been increased in recent years and where higher peel strength of the sheath part is required.
  • the present invention also provides a marine material using the core-sheath composite fiber according to the present invention as described above.
  • the fishery material to be applied include fishing lines, fishing nets, ginger nets, and the like.
  • a marine material using a core-sheath composite fiber having a sheath according to these uses can be obtained.
  • the core-sheath conjugate fiber according to the present invention can be used for sports goods such as knitted fabrics, brush bristle materials, racket guts, vehicle interior products such as car seats, interior products, and the like in addition to those described above. .
  • the sheath part has a specific shape by using the composite fiber manufacturing technology capable of substantially freely designing the above-mentioned recently proposed cross-sectional shape. Even in the case where an expensive sheath material having excellent properties can be realized, and a core-sheath composite fiber having an anchor portion and high peel strength with respect to the core portion can be realized, the sheath portion is as thin as possible. The amount of material used can be kept small. Therefore, the entire composite fiber is selected by selecting a material that can exhibit the optimum characteristics according to the use for each of the core part and the sheath part, and keeping the amount of material used in the sheath part that requires a relatively expensive material small. As a result, it can be manufactured at low cost while having excellent characteristics. In particular, using the core-sheath composite fiber according to the present invention, it is possible to provide an industrial fabric or fishery material having desirable characteristics.
  • the core-sheath composite fiber according to the present invention it is possible to reduce the weight of the composite fiber. That is, when a fiber made of a resin having a relatively large specific gravity represented by a fluorine resin is used as an industrial fabric that is driven at a high speed, a load is applied to the drive unit due to the weight of the fabric.
  • a core-sheath composite fiber it becomes possible to reduce the specific gravity while maintaining the properties of the fiber surface, and it becomes possible to reduce the burden on the drive unit even if the use speed is high, Energy saving during driving and maintenance frequency can be reduced.
  • FIG. 1 (A) It is the whole cross-sectional view (FIG. 1 (A)) and the partial expanded cross-sectional view (FIG. 1 (B)) of the core-sheath conjugate fiber which concerns on one embodiment of this invention. It is a fragmentary cross-sectional view of the core-sheath composite fiber which shows the example of various shapes other than the shape shown in FIG. 1 of the anchor part in this invention.
  • FIG. 1 shows a cross section of a core-sheath conjugate fiber according to an embodiment of the present invention.
  • the core-sheath conjugate fiber 1 shown in FIG. 1A is a core-sheath conjugate fiber in which the core 2 is made of the thermoplastic resin A and the sheath 3 is made of a thermoplastic resin B other than the thermoplastic resin A.
  • the sheath portion 3 has anchor portions 4 that extend into the core portion 2 and are arranged (equally arranged) in the fiber circumferential direction of the sheath portion 3. As shown in FIG.
  • each anchor portion 4 is formed in an undercut shape having a wide portion 6 having a width Wb wider than the width Wa on the base portion 5 side.
  • the anchor portion 4 is configured to have at least a two-stage width structure of a wide width portion 6 and a narrow width portion on the base portion 5 side.
  • the width Wb of the wide width part 6 is 1.5 times or more with respect to the width Wa of the narrow width part on the base part 5 side.
  • the area ratio of the sheath part 3 including the anchor part 4 to the total cross-sectional area of the core-sheath conjugate fiber 1 is 30% or less.
  • the sheath part 3 is connected to and supported by the core part 2 via the anchor part 4, but the anchor part 4 is connected to the root part 5 side. Since it is formed in an undercut shape having a wide portion 6 having a width Wb wider than the width Wa, the anchor portion 4 and eventually the sheath portion 3 are to be displaced relative to the core portion 2 outward in the composite fiber radial direction. The wide portion 6 is locked to the core portion 2 to prevent relative displacement in the direction of the anchor portion 4 (sheath portion 3). The sheath portion 3 is connected to the core portion 2 via the anchor portion 4. On the other hand, it becomes possible to have extremely high peel strength.
  • the sheath portion 3 By increasing the peel strength of the sheath portion 3 with respect to the core portion 2, the sheath portion 3 can be formed thinner, and even if the sheath portion 3 is thin, high peel strength with respect to the core portion 2 is maintained. Therefore, even when an expensive sheath material is used, the sheath 3 can be thinned to reduce the amount of the sheath material used, and the cost of the entire core-sheath composite fiber 1 can be reduced. Become. In particular, the area ratio of the sheath part 3 in the cross section of the core-sheath composite fiber 1 can be made 30% or less, and even when an expensive material is used for the sheath part 3, the amount of use is reduced.
  • the said anchor part 4 is comprised by the at least 2 step
  • the peeling prevention function of the sheath part 3 by the anchor part 4 is further strengthened, and a higher peel strength of the sheath part 3 becomes possible.
  • the sheath 3 that can be thinned as described above, if the area ratio of the sheath 3 in the cross section of the core-sheath composite fiber 1 is 30% or less, an expensive material is used for the sheath 3. Even if it exists, it becomes possible to reduce the usage-amount further, and it becomes possible to aim at the cost reduction as a whole, providing desired functionality to the core-sheath conjugate fiber 1 as a whole.
  • the core portion 2 is mainly used for general physical properties such as strength and flexibility of the composite fiber 1 in order to provide general heat.
  • Thermoplastics that use plastic resin A such as polyamide, polyethylene terephthalate, polybutylene terephthalate, polyethylene, polyethylene naphthalate, etc., and have excellent properties with respect to the required functions for the sheath part 3 although being relatively expensive.
  • Resins B such as polyphenylene sulfide, ethylene tetrafluoroethylene, polyvinylidene fluoride, polyetheretherketone, and the like can be used with high characteristics regarding target functionality.
  • thermoplastic resin B constituting the sheath portion 3 for example, when the sheath portion 3 is required to have water repellency, antifouling properties, chemical resistance, etc., the thermoplastic resin B may be made of a fluororesin.
  • the thermoplastic resin B is preferably made of polyphenylene sulfide.
  • the anchor portion 4a of the sheath portion 3a extending into the core portion 2a is formed in a bowl shape, and has a wide width portion Wb wider than the width Wa on the root portion side. It has an undercut shape.
  • the anchor portion 4b of the sheath portion 3b extending into the core portion 2b has a wide-width portion formed in a partial circular shape, and is wider than the width Wa on the root portion side of the anchor portion 4b. It is formed in an undercut shape having a wide portion with a wide width Wb.
  • the anchor portion 4c of the sheath portion 3c extending into the core portion 2c is formed in a T-shape, and a wide portion having a width Wb wider than the width Wa on the root portion side is formed. It has an undercut shape.
  • the anchor portion 4d of the sheath portion 3d extending into the core portion 2d is formed in a V-shape, and a wide portion having a width Wb wider than the width Wa on the root portion side is formed. It has an undercut shape.
  • FIG. 2 (D) the anchor portion 4d of the sheath portion 3d extending into the core portion 2d is formed in a V-shape, and a wide portion having a width Wb wider than the width Wa on the root portion side is formed. It has an undercut shape.
  • FIG. 2 (D) the anchor portion 4d of the sheath portion 3d extending into the core portion 2d is formed in a V-shape, and a wide portion having a width Wb wider than the width
  • the anchor portion 4e of the sheath portion 3e extending into the core portion 2e is formed in a cross shape, and a wide portion having a width Wb wider than the width Wa on the root portion side is formed. It has an undercut shape.
  • the anchor portion 4f of the sheath portion 3f extending into the core portion 2f is formed in a branched shape, and a wide portion having a width Wb wider than the width Wa on the root portion side is formed. It has an undercut shape.
  • the anchor portion 4g of the sheath portion 3g extending into the core portion 2g is formed in a shape in which the anchor portions having the shape as shown in FIG.
  • the undercut shape has a wide portion having a width Wb wider than the width Wa on the base portion side.
  • the anchor portion 4h of the sheath portion 3h extending into the core portion 2h is formed in a star shape, and a wide portion having a width Wb wider than the width Wa on the base portion side is formed. It has an undercut shape.
  • the anchor portion 4i of the sheath portion 3i extending into the core portion 2i is formed in a hook shape, and has a wide width portion Wb wider than the width Wa on the root side. It has an undercut shape.
  • FIG. 1 are stacked in a plurality of stages.
  • the undercut shape has a wide portion having a width Wb wider than the width Wa on the base portion side.
  • the anchor portion 4h of the sheath portion 3h extending into the core portion 2h is formed in a star shape, and a wide portion having a width Wb wider than the width Wa on the base portion side is formed. It has an undercut shape.
  • the anchor portion 4j of the sheath portion 3j extending into the core portion 2j is formed in a saddle shape or a number 7 shape, and is wider than the width Wa on the root portion side. It is formed in an undercut shape having a wide portion of Wb.
  • the anchor portion 4k of the sheath portion 3k extending into the core portion 2k is formed in an S-shape or a curved strip shape, and has a width Wb wider than the width Wa on the root side. It is formed in an undercut shape having a wide portion.
  • FIG. 2 (K) the anchor portion 4k of the sheath portion 3k extending into the core portion 2k is formed in an S-shape or a curved strip shape, and has a width Wb wider than the width Wa on the root side. It is formed in an undercut shape having a wide portion.
  • the anchor portion 4l of the sheath portion 3l extending into the core portion 2l has a T-shaped top portion curved in FIG. 2 (C) along the sheath portion 3l. It is formed in an extending shape, and is formed in an undercut shape having a wide portion having a width Wb wider than the width Wa on the base portion side.
  • the shape of the anchor portion of the sheath portion in the present invention can take various shapes, and even shapes other than the illustrated examples are included in the scope of the present invention as long as the requirements for the undercut shape in the present invention are satisfied. It is.
  • thermoplastic Polyester elastomer (noted as “Hytrel” in Table 1 to be described later, “Hytrel” (registered trademark) 7247 manufactured by Toray DuPont), polyoxymethylene (noted as “POM” in Table 1 to be described later), manufactured by Polyplastics “Duracon” (registered trademark) FP15X: CF2001), polyether ether ketone (denoted as “PEEK” in Table 1 to be described later, “VESTAKEEEP” (registered trademark) 3300G manufactured by Daicel Evonik) under recommended conditions And prepared.
  • the core-sheath composite fiber was melt-spun with the composition of the core part, the sheath part, the diameter of the composite fiber, the area ratio of the sheath part, the shape and number of the anchor part as shown in Table 1.
  • the eluted fiber was cooled and solidified in water, it was stretched 4.5 times in 60 ° C warm water as the first step and 120 ° C in a dry atmosphere as the second step, and then relaxed heat set in a dry heat atmosphere To obtain a core-sheath composite fiber.
  • Example 1 As compared with Example 1, a core-sheath composite fiber having no anchor portion according to the present invention was produced.
  • Example 8 compared with Example 1, in Example 9, compared with Example 6, the area ratio of the sheath part was increased and the size of the anchor part (the size of the narrow part and the wide part) was increased. A core-sheath composite fiber was produced.
  • the obtained core-sheath composite fiber was subjected to the following measurements and evaluations, and the results shown in Table 1 were obtained.
  • the core-sheath composite fiber according to the present invention provides excellent peel strength of the sheath.
  • the effect of improving the peel strength by the anchor portion in the present invention is clear.
  • the specific gravity slightly increased, the peel strength of the high sheath part was increased.
  • the specific gravity is maintained while maintaining high peel strength.
  • Example 9 It was possible to reduce the weight of the composite fiber by reducing the above. Furthermore, from comparison between Example 9 and Example 6, by increasing the area ratio of the sheath part and increasing the size of the anchor part (Example 9), the sheath part is peeled off while maintaining the same specific gravity. The strength could be further improved. In other words, even if the sheath area ratio is 30% or less and the amount of material used in the sheath is kept small compared to Example 9 (Example 6), a practically high peel strength of the sheath is achieved. It was possible.
  • the core-sheath conjugate fiber according to the present invention can be developed for all uses where improvement in peel strength of the sheath is required, and in particular, the field of fabrics including industrial fabrics, and fishery materials such as fishing lines, fishing nets, ginger nets It is suitable for these fields.

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  • Life Sciences & Earth Sciences (AREA)
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Abstract

Provided are a core-sheath composite fiber, and a woven fabric and fisheries tool using the same, said core-sheath composite fiber having a core part formed from a thermoplastic resin A and a sheath part formed from a thermoplastic resin B other than the thermoplastic resin A, wherein the sheath part has an anchor part that extends to the inside of the core part in a cross-section of the composite fiber, and the anchor part forms an undercut shape having a wide part wider than the root part thereof. It is possible to select materials capable of expressing optimal characteristics according to application for each of the core part and sheath part, and minimize the amount of materials used for the for the sheath part, for which comparatively expensive material is required, thereby making it possible to manufacture the composite fiber inexpensively while giving the composite fiber as a whole superior characteristics.

Description

芯鞘複合繊維およびそれを用いてなる織物と水産資材Core-sheath composite fiber, and woven fabric and fishery material using the same
　本発明は、剥離しにくい特定の断面構造を有する鞘部を備えた芯鞘複合繊維と、それを用いた織物や水産資材に関する。 The present invention relates to a core-sheath composite fiber provided with a sheath having a specific cross-sectional structure that is difficult to peel off, and a woven fabric and marine products using the same.
　異素材を用いた複合繊維、とくに芯部と鞘部からなる芯鞘複合繊維は、芯部の素材の特徴と鞘部の素材の特徴をともに持たせることが可能になることから、種々の用途に展開されている(例えば、特許文献１～３)。 Composite fibers using different materials, especially core-sheath composite fibers consisting of a core and a sheath, can have both the characteristics of the material of the core and the characteristics of the material of the sheath. (For example, Patent Documents 1 to 3).
　このような芯鞘複合繊維においては、芯部と鞘部との複合界面で剥離が起きやすいことが問題であり、剥離の改善について種々の提案が行われている(例えば、上記特許文献１、２)。しかし、近年、剥離の改善についての要求はより高度になりつつあり、例えば、工業用織物の用途では加工速度、使用速度がより高速化しており、求められる剥離強度もより高くなっている。 In such a core-sheath conjugate fiber, there is a problem that peeling is likely to occur at the composite interface between the core and the sheath, and various proposals have been made for improvement of peeling (for example, Patent Document 1, 2). However, in recent years, the demand for improvement in peeling has become more advanced. For example, in industrial textile applications, the processing speed and the use speed have been increased, and the required peel strength has become higher.
　また、芯鞘複合繊維は上記の如く使用する異素材のそれぞれの特徴を活かすことが可能であるため、例えば芯部素材に強度や柔軟性等の物理的特徴を持たせ、鞘部素材に撥水性や耐薬品性等の化学的特徴を持たせ、複合繊維全体として両特性を兼備させることが可能であるが、実際に組み合わせが可能な樹脂は限定されている。また、特に鞘部には、例えば、耐熱性や撥水性、耐薬品性等の機能性を有する樹脂を使用したいことが多いが、一般に、これら機能性を有する樹脂は高価であるので、価格面から複合繊維の使用用途が限定されやすいとともに、複合繊維全体の価格を抑えるために、前述のような高い剥離強度を持たせつつ芯部に対する鞘部の割合を極力小さく抑えて鞘部素材の使用量を抑えることが望まれる。 In addition, since the core-sheath composite fiber can make use of the characteristics of the different materials used as described above, for example, the core material has physical characteristics such as strength and flexibility, and the sheath material is repelled. Although it is possible to give chemical characteristics such as water resistance and chemical resistance and to have both characteristics as a composite fiber as a whole, resins that can actually be combined are limited. In particular, for the sheath part, for example, it is often desirable to use a resin having functionality such as heat resistance, water repellency, and chemical resistance. In order to limit the usage of composite fibers, and to reduce the price of the entire composite fiber, the ratio of the sheath part to the core part should be kept as low as possible while keeping the high peel strength as described above. It is desirable to reduce the amount.
　ところで最近、上記のような芯鞘複合繊維を含む海島複合繊維に関して、島部の分布状態や島部の横断面形状を種々の形態に形成可能な海島複合繊維の製造技術が提案されている（特許文献４～６）。この提案技術によれば、海島複合繊維において、海部に対する島部の大きさや配置、断面形状、配置密度等を実質的に自由に設計することが可能になり、したがって、芯鞘複合繊維における芯部に対する鞘部の断面形状等を実質的に自由に設計することが可能になり、各種分野における各種要求に応えることが可能になると、大きな期待を寄せられている。 Recently, sea-island composite fibers including core-sheath composite fibers as described above have been proposed for producing island-island composite fibers that can form islands in various shapes and cross-sectional shapes of islands ( Patent Documents 4 to 6). According to this proposed technique, in the island-island composite fiber, it is possible to design the size and arrangement of the island part relative to the sea part, the cross-sectional shape, the arrangement density, etc. substantially freely, and therefore the core part in the core-sheath composite fiber. There is great expectation that the cross-sectional shape and the like of the sheath portion can be designed substantially freely, and can meet various requirements in various fields.
特開２００９－２１９３５９号公報JP 2009-219359 A 特開２００９－２１９３６０号公報JP 2009-219360 A 特開２０１２－２１９４００号公報JP 2012-219400 A 特開２０１１－１７４２１５号公報JP 2011-174215 A 特開２０１２－１２７０２２号公報JP 2012-127002 A 特開２０１３－１４８７２号公報JP 2013-14872 A
　そこで本発明の課題は、最近提案された横断面形態を実質的に自由に設計可能な複合繊維の製造技術に着目するとともに、従来の芯鞘複合繊維における問題および要求に着目し、極力薄い鞘部であり鞘部素材の使用量を小さく抑えることが可能でありながら、鞘部が芯部に対して高い剥離強度を有することが可能な芯鞘複合繊維と、それを用いた織物や水産資材を提供することにある。 Accordingly, an object of the present invention is to focus on a recently proposed technique for manufacturing a composite fiber that can be designed substantially freely in cross-sectional form, and on the problems and requirements of conventional core-sheath composite fibers. Core-sheath composite fiber in which the sheath part can have a high peel strength with respect to the core part while being able to keep the amount of use of the sheath part material small, and fabrics and marine products using the same Is to provide.
　上記課題を解決するために、本発明に係る芯鞘複合繊維は、芯部が熱可塑性樹脂Ａ、鞘部が熱可塑性樹脂Ａ以外の熱可塑性樹脂Ｂからなる芯鞘複合繊維であって、複合繊維の横断面において、鞘部が、芯部内へと延びるアンカー部を有し、該アンカー部が、その根元部よりも広幅の広幅部を有するアンダーカット形状に形成されていることを特徴とするものからなる。 In order to solve the above problems, the core-sheath conjugate fiber according to the present invention is a core-sheath conjugate fiber in which the core part is made of the thermoplastic resin A and the sheath part is made of the thermoplastic resin B other than the thermoplastic resin A, In the cross section of the fiber, the sheath part has an anchor part extending into the core part, and the anchor part is formed in an undercut shape having a wider part than the root part. Consists of things.
　このような本発明に係る芯鞘複合繊維においては、芯部の周囲に位置する鞘部が芯部内へと延びるアンカー部を有しているので、鞘部は該アンカー部を介して芯部に支持されることになり、鞘部の芯部に対する剥離強度が高められる。そして、このアンカー部が、その根元部よりも広幅の広幅部を有するアンダーカット形状に形成されていることにより、アンカー部が芯部に対して複合繊維径方向外方に相対変位しようとすると、広幅部が、芯部に係止されてアンカー部の相対変位を阻止するように作用するので、鞘部は、広幅部を有するアンカー部を介して極めて高い剥離強度を有することが可能になる。また、鞘部が芯部に対して高い剥離強度を有するため、鞘部は、薄くても、芯部の周囲に剥離することなくその存在が維持され、高価な鞘部素材を使用する場合にあっても、鞘部を全体として薄層化し鞘部素材の使用量を低減することが可能になる。 In such a core-sheath conjugate fiber according to the present invention, since the sheath part located around the core part has an anchor part extending into the core part, the sheath part is connected to the core part via the anchor part. It will be supported and the peeling strength with respect to the core part of a sheath part will be raised. And, when this anchor part is formed in an undercut shape having a wider part than its root part, the anchor part tries to be relatively displaced outward in the composite fiber radial direction with respect to the core part. Since the wide width portion is locked to the core portion and acts to prevent relative displacement of the anchor portion, the sheath portion can have extremely high peel strength through the anchor portion having the wide width portion. In addition, since the sheath part has a high peel strength with respect to the core part, even if the sheath part is thin, its presence is maintained without peeling around the core part, and when an expensive sheath material is used Even if it exists, it becomes possible to reduce the usage-amount of a sheath part raw material by making a sheath layer thin as a whole.
　上記本発明に係る芯鞘複合繊維においては、上記アンカー部が、上記広幅部と根元部側の狭幅部との少なくとも二段幅構造に構成されていることが好ましい。このように構成することにより、広幅部は芯部に対する相対変位に関してより確実に芯部に係止可能となるので、アンカー部による鞘部の剥離阻止機能が強化されて、鞘部のさらに高い剥離強度の実現が可能になる。 In the core-sheath conjugate fiber according to the present invention, it is preferable that the anchor portion is configured to have at least a two-stage width structure of the wide portion and the narrow portion on the root portion side. With this configuration, the wide portion can be more securely locked to the core portion with respect to the relative displacement with respect to the core portion, so that the function of preventing the peeling of the sheath portion by the anchor portion is enhanced, and the sheath portion is further peeled off. Realization of strength becomes possible.
　上記のような広幅部と根元部側の狭幅部との二段幅構造においては、上記根元部側の狭幅部に対し上記広幅部の幅が１．５倍以上であることが好ましく、より好ましくは１．８倍以上、さらに好ましくは２．０倍以上である。広幅部の幅が１．５倍以上であることにより、アンカー部による鞘部の剥離阻止機能がより強化され、鞘部の一層高い剥離強度が可能になる。 In the two-stage width structure of the wide part and the narrow part on the base part side as described above, the width of the wide part is preferably 1.5 times or more with respect to the narrow part on the base part side, More preferably, it is 1.8 times or more, More preferably, it is 2.0 times or more. When the width of the wide portion is 1.5 times or more, the peeling prevention function of the sheath portion by the anchor portion is further strengthened, and higher peeling strength of the sheath portion becomes possible.
　また、上記本発明に係る芯鞘複合繊維においては、上記アンカー部が、複合繊維の横断面において、鞘部の繊維周方向に複数配列されていることが好ましい。このようにアンカー部が配列されていることにより、横断面のいずれの方向においても鞘部が剥離しにくい芯鞘複合繊維の実現が可能になる。 In the core-sheath composite fiber according to the present invention, it is preferable that a plurality of the anchor portions are arranged in the fiber circumferential direction of the sheath portion in the cross section of the composite fiber. By arranging the anchor portions in this way, it is possible to realize a core-sheath composite fiber in which the sheath portion is difficult to peel off in any direction of the cross section.
　また、上記本発明に係る芯鞘複合繊維においては、複合繊維の横断面における鞘部の面積比率が３０％以下であることが好ましく、より好ましくは２５％以下、さらに好ましくは２０％以下である。複合繊維の横断面における鞘部の面積比率の下限は、特に限定されるものではないが、３％以上が好ましく、５％以上がより好ましい。上述の如く、本発明に係る芯鞘複合繊維は高い鞘部の剥離強度を有するので、鞘部を薄くしても鞘部の剥離阻止が可能になる。したがって、とくに鞘部に高価な素材を使用する場合、その使用量を低減することが可能になり、芯鞘複合繊維に所望の機能性を付与しつつ、全体としてのコスト低減を図ることが可能になる。 In the core-sheath composite fiber according to the present invention, the area ratio of the sheath part in the cross section of the composite fiber is preferably 30% or less, more preferably 25% or less, and still more preferably 20% or less. . Although the minimum of the area ratio of the sheath part in the cross section of a composite fiber is not specifically limited, 3% or more is preferable and 5% or more is more preferable. As described above, since the core-sheath conjugate fiber according to the present invention has a high peel strength at the sheath portion, the sheath portion can be prevented from being peeled even if the sheath portion is thinned. Therefore, especially when using an expensive material for the sheath, it is possible to reduce the amount of use, and it is possible to reduce the overall cost while imparting desired functionality to the core-sheath composite fiber. become.
　また、上記本発明に係る芯鞘複合繊維においては、鞘部に要求される機能に関して、熱可塑性樹脂Ｂが熱可塑性樹脂Ａよりも高特性の樹脂からなる形態を採ることができる。例えば、芯部には、主として複合繊維の強度や柔軟性等の物理的特性を担わせるために、汎用の熱可塑性樹脂Ａ、例えば、ナイロン６やナイロン６６に代表されるポリアミド、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレートに代表されるポリエステル、ポリエチレンに代表されるポリオレフィン、ポリアセタール等の樹脂を使用し、鞘部には、比較的高価ではあるが要求される機能に関して優れた特性を有する熱可塑性樹脂Ｂ、例えば、エチレンテトラフルオロエチレン、ポリフッ化ビニリデンに代表されるフッ素系樹脂、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等の樹脂を使用することができる。 Further, in the core-sheath composite fiber according to the present invention, the thermoplastic resin B can be formed of a higher characteristic resin than the thermoplastic resin A with respect to the function required for the sheath part. For example, the core portion mainly has physical properties such as strength and flexibility of the composite fiber, so that a general-purpose thermoplastic resin A, for example, polyamide represented by nylon 6 or nylon 66, polyethylene terephthalate, poly Thermoplastics that use resins such as butylene terephthalate, polyesters typified by polyethylene naphthalate, polyolefins typified by polyethylene, polyacetal, etc., and have superior properties with respect to the required functions, although they are relatively expensive. Resin B, for example, a resin such as fluorine resin represented by ethylene tetrafluoroethylene and polyvinylidene fluoride, polyphenylene sulfide, polyether ether ketone and the like can be used.
　熱可塑性樹脂Ａ、Ｂ共に必要に応じて、例えば顔料、染料、耐光剤、紫外線吸収剤、酸化防止剤、蛍光増白剤、結晶化抑制剤などの添加剤を、目的とする性能を阻害しない範囲で、芯成分および／または鞘成分に、その重合工程、重合後あるいは紡糸直前に添加することができる。特に、カーボンブラックや金属粉末等の導電性付与剤を添加した場合には、工業用織物にさらに好適となる（高速の製造工程中で発生する静電気を逃がすことができるため）。また、母材樹脂と比重の異なる充填剤を添加した場合には、水中での糸の浮遊具合を制御できるため、水産資材としてさらに好適となる。 For thermoplastic resins A and B, additives such as pigments, dyes, light-proofing agents, ultraviolet absorbers, antioxidants, fluorescent brighteners, crystallization inhibitors, etc., as required, do not hinder the intended performance. In the range, it can be added to the core component and / or the sheath component in the polymerization step, after polymerization, or just before spinning. In particular, when a conductivity imparting agent such as carbon black or metal powder is added, it is more suitable for industrial fabrics (since static electricity generated during a high-speed manufacturing process can be released). Further, when a filler having a specific gravity different from that of the base material resin is added, it is possible to control the floating state of the yarn in water, and therefore, it is further suitable as a marine material.
　上記のような熱可塑性樹脂Ｂにおいては、例えば鞘部に撥水性や防汚性、耐薬品性等が要求される場合には、熱可塑性樹脂Ｂがフッ素系樹脂からなることが好ましい。鞘部に耐加水分解性や耐薬品性、耐熱性等が要求される場合には、例えば、熱可塑性樹脂Ｂがポリフェニレンサルファイドからなることが好ましい。 In the thermoplastic resin B as described above, for example, when the sheath is required to have water repellency, antifouling property, chemical resistance, etc., the thermoplastic resin B is preferably made of a fluororesin. When the sheath portion is required to have hydrolysis resistance, chemical resistance, heat resistance, or the like, for example, the thermoplastic resin B is preferably made of polyphenylene sulfide.
　また、上記本発明に係る芯鞘複合繊維において、芯鞘複合繊維の繊維径としては特に限定されないが、各種実用的な用途を考慮すると、繊維径は０．０５～５ｍｍの範囲にあることが好ましく、より好ましくは０．１～３ｍｍの範囲である。 Further, in the core-sheath composite fiber according to the present invention, the fiber diameter of the core-sheath composite fiber is not particularly limited, but considering various practical uses, the fiber diameter may be in the range of 0.05 to 5 mm. Preferably, it is in the range of 0.1 to 3 mm.
　本発明に係る芯鞘複合繊維は種々の用途に展開可能である。本発明は、上記のような本発明に係る芯鞘複合繊維を用いてなる織物についても提供する。本発明に係る芯鞘複合繊維は、とくに近年加工速度、使用速度がより高速化しており、鞘部のより高い剥離強度が求められている工業用織物に用いて好適なものである。 The core-sheath composite fiber according to the present invention can be developed for various uses. The present invention also provides a woven fabric using the core-sheath conjugate fiber according to the present invention as described above. The core-sheath conjugate fiber according to the present invention is particularly suitable for industrial fabrics whose processing speed and use speed have been increased in recent years and where higher peel strength of the sheath part is required.
　また、本発明は、上記のような本発明に係る芯鞘複合繊維を用いてなる水産資材についても提供する。適用対象となる水産資材としては、例えば、釣り糸、漁網、生簀網等を挙げることができる。とくに、これらの用途に応じた鞘部を有する芯鞘複合繊維を用いた水産資材とすることができる。 The present invention also provides a marine material using the core-sheath composite fiber according to the present invention as described above. Examples of the fishery material to be applied include fishing lines, fishing nets, ginger nets, and the like. In particular, a marine material using a core-sheath composite fiber having a sheath according to these uses can be obtained.
　本発明に係る芯鞘複合繊維は、上述した以外にも、編物、ブラシ用毛材、ラケット用ガット等のスポーツ用品、カーシート等の車両内装品、インテリア製品などの用途に使用することができる。 The core-sheath conjugate fiber according to the present invention can be used for sports goods such as knitted fabrics, brush bristle materials, racket guts, vehicle interior products such as car seats, interior products, and the like in addition to those described above. .
　このように、本発明に係る芯鞘複合繊維によれば、前述の最近提案された横断面形態を実質的に自由に設計可能な複合繊維の製造技術を利用して、鞘部が特定形状のアンカー部を有し芯部に対して高い剥離強度を有する芯鞘複合繊維を実現でき、優れた特性を有する高価な鞘部素材が要求される場合にあっても、極力薄い鞘部として鞘部素材の使用量を小さく抑えることが可能になる。したがって、芯部、鞘部それぞれに用途に応じた最適な特徴を発現可能な素材を選定し、かつ、比較的高価な素材が要求される鞘部の素材使用量を小さく抑えて、複合繊維全体として優れた特性を持たせつつ安価に製造することが可能になる。とくに、本発明に係る芯鞘複合繊維を用いて、望ましい特性を備えた工業用織物や水産資材を提供することができる。 As described above, according to the core-sheath composite fiber according to the present invention, the sheath part has a specific shape by using the composite fiber manufacturing technology capable of substantially freely designing the above-mentioned recently proposed cross-sectional shape. Even in the case where an expensive sheath material having excellent properties can be realized, and a core-sheath composite fiber having an anchor portion and high peel strength with respect to the core portion can be realized, the sheath portion is as thin as possible. The amount of material used can be kept small. Therefore, the entire composite fiber is selected by selecting a material that can exhibit the optimum characteristics according to the use for each of the core part and the sheath part, and keeping the amount of material used in the sheath part that requires a relatively expensive material small. As a result, it can be manufactured at low cost while having excellent characteristics. In particular, using the core-sheath composite fiber according to the present invention, it is possible to provide an industrial fabric or fishery material having desirable characteristics.
　また、本発明に係る芯鞘複合繊維によれば、複合繊維の軽量化を図ることも可能になる。すなわち、フッ素系樹脂に代表される比重の比較的大きい樹脂からなる繊維を高速で駆動する工業用織物として用いた際には、織物の重量によって駆動部に負担がかかっていたが、本発明に係る芯鞘複合繊維とすることで、繊維表面の特性を保持したまま比重を下げることが可能になり、使用速度が高速であっても駆動部に係る負担を軽くすることが可能になるため、駆動時の省エネルギー化、メンテナンス頻度の低減が可能になる。 Further, according to the core-sheath composite fiber according to the present invention, it is possible to reduce the weight of the composite fiber. That is, when a fiber made of a resin having a relatively large specific gravity represented by a fluorine resin is used as an industrial fabric that is driven at a high speed, a load is applied to the drive unit due to the weight of the fabric. By making such a core-sheath composite fiber, it becomes possible to reduce the specific gravity while maintaining the properties of the fiber surface, and it becomes possible to reduce the burden on the drive unit even if the use speed is high, Energy saving during driving and maintenance frequency can be reduced.
本発明の一実施態様に係る芯鞘複合繊維の全体横断面図(図１（Ａ）)および部分拡大横断面図(図１（Ｂ）)である。It is the whole cross-sectional view (FIG. 1 (A)) and the partial expanded cross-sectional view (FIG. 1 (B)) of the core-sheath conjugate fiber which concerns on one embodiment of this invention. 本発明におけるアンカー部の図１に示した形状以外の各種形状例を示す芯鞘複合繊維の部分横断面図である。It is a fragmentary cross-sectional view of the core-sheath composite fiber which shows the example of various shapes other than the shape shown in FIG. 1 of the anchor part in this invention.
　以下に、本発明の実施の形態について、図面を参照しながら詳細に説明する。
　図１は、本発明の一実施態様に係る芯鞘複合繊維の横断面を示している。図１（Ａ）に示す芯鞘複合繊維１は、芯部２が熱可塑性樹脂Ａ、鞘部３が熱可塑性樹脂Ａ以外の熱可塑性樹脂Ｂからなる芯鞘複合繊維であり、芯鞘複合繊維１の横断面において、鞘部３は、芯部２内へと延び鞘部３の繊維周方向に複数配列（等配）されているアンカー部４を有している。各アンカー部４は、図１（Ｂ）に示すように、その根元部５側の幅Ｗａよりも広い幅Ｗｂの広幅部６を有するアンダーカット形状に形成されている。本実施態様では、アンカー部４は、広幅部６と根元部５側の狭幅部との少なくとも二段幅構造に構成されている。また本実施態様では、根元部５側の狭幅部の幅Ｗａに対し広幅部６の幅Ｗｂが１．５倍以上とされている。さらに本実施態様では、芯鞘複合繊維１の横断面トータル面積に対する、アンカー部４を含む鞘部３の面積比率は３０％以下とされている。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a cross section of a core-sheath conjugate fiber according to an embodiment of the present invention. The core-sheath conjugate fiber 1 shown in FIG. 1A is a core-sheath conjugate fiber in which the core 2 is made of the thermoplastic resin A and the sheath 3 is made of a thermoplastic resin B other than the thermoplastic resin A. 1, the sheath portion 3 has anchor portions 4 that extend into the core portion 2 and are arranged (equally arranged) in the fiber circumferential direction of the sheath portion 3. As shown in FIG. 1B, each anchor portion 4 is formed in an undercut shape having a wide portion 6 having a width Wb wider than the width Wa on the base portion 5 side. In the present embodiment, the anchor portion 4 is configured to have at least a two-stage width structure of a wide width portion 6 and a narrow width portion on the base portion 5 side. Moreover, in this embodiment, the width Wb of the wide width part 6 is 1.5 times or more with respect to the width Wa of the narrow width part on the base part 5 side. Furthermore, in this embodiment, the area ratio of the sheath part 3 including the anchor part 4 to the total cross-sectional area of the core-sheath conjugate fiber 1 is 30% or less.
　上記実施態様に係る芯鞘複合繊維１においては、鞘部３は、アンカー部４を介して芯部２に接続、支持されることになるが、このアンカー部４が、その根元部５側の幅Ｗａよりも広い幅Ｗｂの広幅部６を有するアンダーカット形状に形成されているので、アンカー部４、ひいては鞘部３が芯部２に対して複合繊維径方向外方に相対変位しようとすると、広幅部６が芯部２に係止されてアンカー部４（鞘部３）のその方向への相対変位を阻止するように働き、鞘部３は、アンカー部４を介して芯部２に対し極めて高い剥離強度を有することが可能になる。鞘部３の芯部２に対する剥離強度が高められることにより、鞘部３をより薄く形成することが可能になり、鞘部３が薄くても芯部２に対する高い剥離強度が維持される。したがって、高価な鞘部素材を使用する場合にあっても、鞘部３を薄層化し鞘部素材の使用量を低減することが可能になり、芯鞘複合繊維１全体のコストダウンが可能になる。とくに、芯鞘複合繊維１の横断面における鞘部３の面積比率を３０％以下にすることが可能になり、鞘部３に高価な素材を使用する場合にあってもその使用量を低減することが可能になり、芯鞘複合繊維１に所望の機能性を付与しつつ、全体としてのコスト低減を図ることが可能になる。また、前述したように、鞘部３の面積比率を小さく抑えることによって、芯鞘複合繊維１全体の比重を下げ、軽量化を図ることも可能になる。 In the core-sheath conjugate fiber 1 according to the above embodiment, the sheath part 3 is connected to and supported by the core part 2 via the anchor part 4, but the anchor part 4 is connected to the root part 5 side. Since it is formed in an undercut shape having a wide portion 6 having a width Wb wider than the width Wa, the anchor portion 4 and eventually the sheath portion 3 are to be displaced relative to the core portion 2 outward in the composite fiber radial direction. The wide portion 6 is locked to the core portion 2 to prevent relative displacement in the direction of the anchor portion 4 (sheath portion 3). The sheath portion 3 is connected to the core portion 2 via the anchor portion 4. On the other hand, it becomes possible to have extremely high peel strength. By increasing the peel strength of the sheath portion 3 with respect to the core portion 2, the sheath portion 3 can be formed thinner, and even if the sheath portion 3 is thin, high peel strength with respect to the core portion 2 is maintained. Therefore, even when an expensive sheath material is used, the sheath 3 can be thinned to reduce the amount of the sheath material used, and the cost of the entire core-sheath composite fiber 1 can be reduced. Become. In particular, the area ratio of the sheath part 3 in the cross section of the core-sheath composite fiber 1 can be made 30% or less, and even when an expensive material is used for the sheath part 3, the amount of use is reduced. It becomes possible, and it becomes possible to aim at the cost reduction as a whole, providing desired functionality to the core-sheath conjugate fiber 1. In addition, as described above, by suppressing the area ratio of the sheath portion 3 to a small value, the specific gravity of the core-sheath composite fiber 1 as a whole can be lowered and the weight can be reduced.
　そして、上記アンカー部４が、上記広幅部６と根元部５側の狭幅部との少なくとも二段幅構造に構成されていることにより、さらには広幅部６の幅が根元部５側の狭幅部の幅の１．５倍以上であることにより、アンカー部４による鞘部３の剥離阻止機能がより強化され、鞘部３の一層高い剥離強度が可能になる。また、アンカー部４が、芯鞘複合繊維１の横断面において、繊維周方向に複数配列されていることにより、横断面のいずれの方向においても鞘部３の高い剥離強度が確保され、鞘部３が極めて剥離しにくい芯鞘複合繊維１が実現される。 And since the said anchor part 4 is comprised by the at least 2 step | paragraph width structure of the said wide part 6 and the narrow part by the side of the base part 5, the width | variety of the wide part 6 is further narrow by the base part 5 side. By being 1.5 times or more the width of the width part, the peeling prevention function of the sheath part 3 by the anchor part 4 is further strengthened, and a higher peel strength of the sheath part 3 becomes possible. In addition, by arranging a plurality of anchor portions 4 in the fiber circumferential direction in the cross section of the core-sheath conjugate fiber 1, high peel strength of the sheath portion 3 is ensured in any direction of the cross section, and the sheath portion A core-sheath composite fiber 1 in which 3 is extremely difficult to peel is realized.
　さらに、上述の如く薄層化可能な鞘部３に関して、芯鞘複合繊維１の横断面における鞘部３の面積比率を３０％以下にすれば、鞘部３に高価な素材を使用する場合にあってもその使用量を一層低減することが可能になり、芯鞘複合繊維１に全体として所望の機能性を付与しつつ、全体としてのコスト低減を図ることが可能になる。 Furthermore, regarding the sheath 3 that can be thinned as described above, if the area ratio of the sheath 3 in the cross section of the core-sheath composite fiber 1 is 30% or less, an expensive material is used for the sheath 3. Even if it exists, it becomes possible to reduce the usage-amount further, and it becomes possible to aim at the cost reduction as a whole, providing desired functionality to the core-sheath conjugate fiber 1 as a whole.
　芯鞘複合繊維１に全体として所望の機能性を付与する場合には、例えば、芯部２には、主として複合繊維１の強度や柔軟性等の物理的特性を担わせるために、汎用の熱可塑性樹脂Ａであるポリアミド、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレン、ポリエチレンナフタレート等の樹脂を使用し、鞘部３には、比較的高価ではあるが要求される機能に関して優れた特性を有する熱可塑性樹脂Ｂ、例えば、ポリフェニレンサルファイド、エチレンテトラフルオロエチレン、ポリフッ化ビニリデン、ポリエーテルエーテルケトン等の、目標とする機能性に関して高特性の樹脂を使用することができる。とくに、鞘部３を構成する熱可塑性樹脂Ｂに関して、例えば鞘部３に撥水性や防汚性、耐薬品性等が要求される場合には、熱可塑性樹脂Ｂがフッ素系樹脂からなることが好ましく、鞘部３に耐加水分解性や耐薬品性等が要求される場合には、例えば、熱可塑性樹脂Ｂがポリフェニレンサルファイドからなることが好ましい。 When desired functionality is imparted to the core-sheath composite fiber 1 as a whole, for example, the core portion 2 is mainly used for general physical properties such as strength and flexibility of the composite fiber 1 in order to provide general heat. Thermoplastics that use plastic resin A such as polyamide, polyethylene terephthalate, polybutylene terephthalate, polyethylene, polyethylene naphthalate, etc., and have excellent properties with respect to the required functions for the sheath part 3 although being relatively expensive. Resins B such as polyphenylene sulfide, ethylene tetrafluoroethylene, polyvinylidene fluoride, polyetheretherketone, and the like can be used with high characteristics regarding target functionality. In particular, regarding the thermoplastic resin B constituting the sheath portion 3, for example, when the sheath portion 3 is required to have water repellency, antifouling properties, chemical resistance, etc., the thermoplastic resin B may be made of a fluororesin. Preferably, when the sheath 3 is required to have hydrolysis resistance, chemical resistance, or the like, for example, the thermoplastic resin B is preferably made of polyphenylene sulfide.
　上述のような芯鞘複合繊維１における鞘部のアンカー部の形状としては、図１に示したもの以外にも各種の形状を採り得る。各種形状例を図２に示す。 As the shape of the anchor portion of the sheath portion in the core-sheath conjugate fiber 1 as described above, various shapes other than those shown in FIG. 1 can be adopted. Examples of various shapes are shown in FIG.
　図２（Ａ）に示す例では、芯部２ａ内へと延びる鞘部３ａのアンカー部４ａは、錨形の形状に形成され、その根元部側の幅Ｗａよりも広い幅Ｗｂの広幅部を有するアンダーカット形状に形成されている。図２（Ｂ）に示す例では、芯部２ｂ内へと延びる鞘部３ｂのアンカー部４ｂは、広幅部が部分円状の形状に形成され、アンカー部４ｂの根元部側の幅Ｗａよりも広い幅Ｗｂの広幅部を有するアンダーカット形状に形成されている。図２（Ｃ）に示す例では、芯部２ｃ内へと延びる鞘部３ｃのアンカー部４ｃは、Ｔ字形の形状に形成され、その根元部側の幅Ｗａよりも広い幅Ｗｂの広幅部を有するアンダーカット形状に形成されている。図２（Ｄ）に示す例では、芯部２ｄ内へと延びる鞘部３ｄのアンカー部４ｄは、Ｖ字形の形状に形成され、その根元部側の幅Ｗａよりも広い幅Ｗｂの広幅部を有するアンダーカット形状に形成されている。図２（Ｅ）に示す例では、芯部２ｅ内へと延びる鞘部３ｅのアンカー部４ｅは、十字形の形状に形成され、その根元部側の幅Ｗａよりも広い幅Ｗｂの広幅部を有するアンダーカット形状に形成されている。図２（Ｆ）に示す例では、芯部２ｆ内へと延びる鞘部３ｆのアンカー部４ｆは、枝分かれ形の形状に形成され、その根元部側の幅Ｗａよりも広い幅Ｗｂの広幅部を有するアンダーカット形状に形成されている。図２（Ｇ）に示す例では、芯部２ｇ内へと延びる鞘部３ｇのアンカー部４ｇは、図１に示したような形状のアンカー部が複数段に積み重ねられたような形状に形成され、その根元部側の幅Ｗａよりも広い幅Ｗｂの広幅部を有するアンダーカット形状に形成されている。図２（Ｈ）に示す例では、芯部２ｈ内へと延びる鞘部３ｈのアンカー部４ｈは、星形の形状に形成され、その根元部側の幅Ｗａよりも広い幅Ｗｂの広幅部を有するアンダーカット形状に形成されている。図２（Ｉ）に示す例では、芯部２ｉ内へと延びる鞘部３ｉのアンカー部４ｉは、フック形の形状に形成され、その根元部側の幅Ｗａよりも広い幅Ｗｂの広幅部を有するアンダーカット形状に形成されている。図２（Ｊ）に示す例では、芯部２ｊ内へと延びる鞘部３ｊのアンカー部４ｊは、鉤状または数字の７状の形状に形成され、その根元部側の幅Ｗａよりも広い幅Ｗｂの広幅部を有するアンダーカット形状に形成されている。図２（Ｋ）に示す例では、芯部２ｋ内へと延びる鞘部３ｋのアンカー部４ｋは、Ｓ字状または湾曲帯状の形状に形成され、その根元部側の幅Ｗａよりも広い幅Ｗｂの広幅部を有するアンダーカット形状に形成されている。図２（Ｌ）に示す例では、芯部２ｌ内へと延びる鞘部３ｌのアンカー部４ｌは、図２（Ｃ）に示したＴ字形のＴ字頂部が鞘部３ｌに沿って湾曲して延びる形状に形成され、その根元部側の幅Ｗａよりも広い幅Ｗｂの広幅部を有するアンダーカット形状に形成されている。 In the example shown in FIG. 2A, the anchor portion 4a of the sheath portion 3a extending into the core portion 2a is formed in a bowl shape, and has a wide width portion Wb wider than the width Wa on the root portion side. It has an undercut shape. In the example shown in FIG. 2 (B), the anchor portion 4b of the sheath portion 3b extending into the core portion 2b has a wide-width portion formed in a partial circular shape, and is wider than the width Wa on the root portion side of the anchor portion 4b. It is formed in an undercut shape having a wide portion with a wide width Wb. In the example shown in FIG. 2C, the anchor portion 4c of the sheath portion 3c extending into the core portion 2c is formed in a T-shape, and a wide portion having a width Wb wider than the width Wa on the root portion side is formed. It has an undercut shape. In the example shown in FIG. 2 (D), the anchor portion 4d of the sheath portion 3d extending into the core portion 2d is formed in a V-shape, and a wide portion having a width Wb wider than the width Wa on the root portion side is formed. It has an undercut shape. In the example shown in FIG. 2 (E), the anchor portion 4e of the sheath portion 3e extending into the core portion 2e is formed in a cross shape, and a wide portion having a width Wb wider than the width Wa on the root portion side is formed. It has an undercut shape. In the example shown in FIG. 2 (F), the anchor portion 4f of the sheath portion 3f extending into the core portion 2f is formed in a branched shape, and a wide portion having a width Wb wider than the width Wa on the root portion side is formed. It has an undercut shape. In the example shown in FIG. 2G, the anchor portion 4g of the sheath portion 3g extending into the core portion 2g is formed in a shape in which the anchor portions having the shape as shown in FIG. 1 are stacked in a plurality of stages. The undercut shape has a wide portion having a width Wb wider than the width Wa on the base portion side. In the example shown in FIG. 2 (H), the anchor portion 4h of the sheath portion 3h extending into the core portion 2h is formed in a star shape, and a wide portion having a width Wb wider than the width Wa on the base portion side is formed. It has an undercut shape. In the example shown in FIG. 2 (I), the anchor portion 4i of the sheath portion 3i extending into the core portion 2i is formed in a hook shape, and has a wide width portion Wb wider than the width Wa on the root side. It has an undercut shape. In the example shown in FIG. 2 (J), the anchor portion 4j of the sheath portion 3j extending into the core portion 2j is formed in a saddle shape or a number 7 shape, and is wider than the width Wa on the root portion side. It is formed in an undercut shape having a wide portion of Wb. In the example shown in FIG. 2 (K), the anchor portion 4k of the sheath portion 3k extending into the core portion 2k is formed in an S-shape or a curved strip shape, and has a width Wb wider than the width Wa on the root side. It is formed in an undercut shape having a wide portion. In the example shown in FIG. 2 (L), the anchor portion 4l of the sheath portion 3l extending into the core portion 2l has a T-shaped top portion curved in FIG. 2 (C) along the sheath portion 3l. It is formed in an extending shape, and is formed in an undercut shape having a wide portion having a width Wb wider than the width Wa on the base portion side.
　このように、本発明における鞘部のアンカー部の形状は種々の形状を採り得、図示例以外の形状であっても、本発明におけるアンダーカット形状の要件を満たす限り、本発明の範囲に含まれる。 Thus, the shape of the anchor portion of the sheath portion in the present invention can take various shapes, and even shapes other than the illustrated examples are included in the scope of the present invention as long as the requirements for the undercut shape in the present invention are satisfied. It is.
　以下に、本発明の実施例について説明する。
実施例１～９、比較例１
［複合繊維の作製］
　複合繊維の芯部、鞘部の原料として、ナイロン６（後述の表１においては「Ｎｙ６」と表記、東レ（株）製“アミラン”（登録商標）ＣＭ１０２１ＴＭ）、ナイロン６６（後述の表１においては「Ｎｙ６６」と表記、東レ（株）製“アミラン” （登録商標）ＣＭ３００１Ｃ－Ｎ）、ポリエチレンテレフタレート（後述の表１においては「ＰＥＴ」と表記、東レ（株）製Ｔ７５５Ｍ）、ポリエチレンナフタレート（後述の表１においては「ＰＥＮ」と表記、帝人（株）製“テオネックス”（登録商標）ＴＮ８０６５Ｓ）、テトラフルオロエチレン―エチレン共重合体（後述の表１においては「ＥＴＦＥ」と表記、旭硝子（株）製“Ｆｌｕｏｎ”（登録商標）Ｃ－８８ＡＸＰ）、四弗化エチレン―六弗化プロピレン共重合体（後述の表１においては「ＦＥＰ」と表記、ダイキン社製ネオフロンＥＦＥＰ：ＲＰ－４０２０）、ポリフェニレンサルファイド（後述の表１においては「ＰＰＳ」と表記、東レ（株）製“トレリナ” （登録商標）Ｅ２０８０）、熱可塑性ポリエステルエラストマー（後述の表１においては「ハイトレル」と表記、東レ・デュポン社製“ハイトレル”（登録商標）７２４７）、ポリオキシメチレン（後述の表１においては「ＰＯＭ」と表記、ポリプラスチック社製“ジュラコン”（登録商標）ＦＰ１５Ｘ：ＣＦ２００１）、ポリエーテルエーテルケトン（後述の表１においては「ＰＥＥＫ」と表記、ダイセルエボニック社製“ＶＥＳＴＡＫＥＥＰ” （登録商標）３３００Ｇ）を推奨される条件にて乾燥し準備した。芯部、鞘部の組成、複合繊維の直径、鞘部の面積比率、アンカー部の形状、数を表１に示す通りとし、芯鞘複合繊維を溶融紡糸した。 Examples of the present invention will be described below.
Examples 1 to 9, Comparative Example 1
[Production of composite fiber]
As raw materials for the core and sheath of the composite fiber, nylon 6 (noted as “Ny6” in Table 1 to be described later, “Amilan” (registered trademark) CM1021TM manufactured by Toray Industries, Inc.), nylon 66 (in Table 1 to be described later) Is “Ny66”, “Amilan” (registered trademark) CM3001C-N manufactured by Toray Industries, Inc.), polyethylene terephthalate (indicated in the following Table 1 as “PET”, T755M manufactured by Toray Industries, Inc.), polyethylene naphthalate (In Table 1 described later, “PEN”, “Teonex” (registered trademark) TN8065S, manufactured by Teijin Limited), tetrafluoroethylene-ethylene copolymer (in Table 1, described below, “ETFE”, Asahi Glass Co., Ltd.) "Fluon" (registered trademark) C-88AXP), a tetrafluoroethylene-hexafluoropropylene copolymer (in Table 1 described later) Is represented by “FEP”, Daikin's neoflon EFEP: RP-4020), polyphenylene sulfide (indicated in Table 1 below as “PPS”, Toray Industries, Inc. “Torelina” (registered trademark) E2080), thermoplastic Polyester elastomer (noted as “Hytrel” in Table 1 to be described later, “Hytrel” (registered trademark) 7247 manufactured by Toray DuPont), polyoxymethylene (noted as “POM” in Table 1 to be described later), manufactured by Polyplastics “Duracon” (registered trademark) FP15X: CF2001), polyether ether ketone (denoted as “PEEK” in Table 1 to be described later, “VESTAKEEEP” (registered trademark) 3300G manufactured by Daicel Evonik) under recommended conditions And prepared. The core-sheath composite fiber was melt-spun with the composition of the core part, the sheath part, the diameter of the composite fiber, the area ratio of the sheath part, the shape and number of the anchor part as shown in Table 1.
　溶出された繊維を水中で冷却固化させた後、一段目として６０℃の温水中で、二段目として１２０℃乾燥雰囲気中で４．５倍に延伸し、次いで乾熱雰囲気中で弛緩熱セットを実施して芯鞘複合繊維を得た。 After the eluted fiber was cooled and solidified in water, it was stretched 4.5 times in 60 ° C warm water as the first step and 120 ° C in a dry atmosphere as the second step, and then relaxed heat set in a dry heat atmosphere To obtain a core-sheath composite fiber.
　比較例１では、実施例１に比べ、本発明によるアンカー部を持たない芯鞘複合繊維を作製した。実施例８では、実施例１に比べ、実施例９では、実施例６に比べ、それぞれ、鞘部の面積比率を増大させアンカー部のサイズ（狭幅部及び広幅部のサイズ）を増加させた芯鞘複合繊維を作製した。 In Comparative Example 1, as compared with Example 1, a core-sheath composite fiber having no anchor portion according to the present invention was produced. In Example 8, compared with Example 1, in Example 9, compared with Example 6, the area ratio of the sheath part was increased and the size of the anchor part (the size of the narrow part and the wide part) was increased. A core-sheath composite fiber was produced.
　得られた芯鞘複合繊維について、以下の測定、評価を行い、表１に示す結果を得た。 The obtained core-sheath composite fiber was subjected to the following measurements and evaluations, and the results shown in Table 1 were obtained.
［複合繊維の比重の測定］
　ＪＩＳ　Ｌ　１０１３（２０１０）８．１７．１の比重（浮沈法）に従って、複合繊維の比重を測定した。 [Measurement of specific gravity of composite fiber]
The specific gravity of the composite fiber was measured according to the specific gravity (floating / sinking method) of JIS L 1013 (2010) 8.17.1.
［剥離強度の評価］
　ＪＩＳ　Ｌ　１０９５（２０１０）９．１０．２Ｂ法に準ずる糸摩耗試験機を用い、摩擦速度１２０回／ｍｍ、摩擦角度１１０°、往復距離２．５ｃｍ、試験長２０ｃｍ、摩擦子φ０．６ｍｍの硬質鋼の条件で、１０本のサンプルを１００回摩擦させた。摩擦子の当たった部分をマイクロスコープにて観察し、次の基準にて剥離強度を判定した。
Ａ：全てのサンプルが繊維として一体化しており、芯鞘界面にひびが見られたサンプルが１０本中５本未満であった。
Ｂ：全てのサンプルが繊維として一体化しており、芯鞘界面にひびが見られたサンプルが１０本中５本以上であった。
Ｃ：芯鞘界面が剥離し、繊維として一体化していないサンプルがあった。 [Evaluation of peel strength]
Using a yarn wear tester according to JIS L 1095 (2010) 9.10.2B method, a friction speed of 120 times / mm, a friction angle of 110 °, a reciprocating distance of 2.5 cm, a test length of 20 cm, and a friction element of φ0.6 mm Ten samples were rubbed 100 times under steel conditions. The part where the friction element hit was observed with a microscope, and the peel strength was determined according to the following criteria.
A: All the samples were integrated as a fiber, and the number of samples in which the core-sheath interface was cracked was less than 5 out of 10.
B: All samples were integrated as a fiber, and the number of samples in which cracks were observed at the core-sheath interface was 5 or more out of 10.
C: There was a sample in which the core-sheath interface peeled off and was not integrated as a fiber.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　表１に示す結果から分かるように、本発明に係る芯鞘複合繊維では優れた鞘部の剥離強度が得られる。特に実施例１と比較例１との比較から、本発明におけるアンカー部による剥離強度向上の効果が明らかである。また、実施例８と実施例１との比較から、鞘部の面積比率を増大させアンカー部のサイズを増加させることにより（実施例８）、若干比重は上昇したものの、高い鞘部の剥離強度を維持することができた。逆に言えば、実施例８に比べ鞘部の面積比率を３０％以下にして鞘部の素材使用量を小さく抑えても（実施例１）、高い鞘部の剥離強度を維持しつつ、比重を低下させて複合繊維の軽量化を図ることが可能であった。さらに、実施例９と実施例６との比較から、鞘部の面積比率を増大させアンカー部のサイズを増加させることにより（実施例９）、比重を同程度に維持しつつ、鞘部の剥離強度をより向上することができた。逆に言えば、実施例９に比べ鞘部の面積比率を３０％以下にして鞘部の素材使用量を小さく抑えても（実施例６）、実用的に高い鞘部の剥離強度を実現することが可能であった。 As can be seen from the results shown in Table 1, the core-sheath composite fiber according to the present invention provides excellent peel strength of the sheath. In particular, from the comparison between Example 1 and Comparative Example 1, the effect of improving the peel strength by the anchor portion in the present invention is clear. Moreover, from the comparison between Example 8 and Example 1, by increasing the area ratio of the sheath part and increasing the size of the anchor part (Example 8), although the specific gravity slightly increased, the peel strength of the high sheath part was increased. Could be maintained. In other words, even if the sheath area ratio is 30% or less and the amount of material used in the sheath is kept small compared to Example 8 (Example 1), the specific gravity is maintained while maintaining high peel strength. It was possible to reduce the weight of the composite fiber by reducing the above. Furthermore, from comparison between Example 9 and Example 6, by increasing the area ratio of the sheath part and increasing the size of the anchor part (Example 9), the sheath part is peeled off while maintaining the same specific gravity. The strength could be further improved. In other words, even if the sheath area ratio is 30% or less and the amount of material used in the sheath is kept small compared to Example 9 (Example 6), a practically high peel strength of the sheath is achieved. It was possible.
　本発明に係る芯鞘複合繊維は、鞘部の剥離強度の向上が求められるあらゆる用途に展開可能であり、とくに、工業用織物を含む織物の分野や、釣り糸、漁網、生簀網等の水産資材の分野に好適である。 The core-sheath conjugate fiber according to the present invention can be developed for all uses where improvement in peel strength of the sheath is required, and in particular, the field of fabrics including industrial fabrics, and fishery materials such as fishing lines, fishing nets, ginger nets It is suitable for these fields.
１　芯鞘複合繊維
２、２ａ、２ｂ、２ｃ、２ｄ、２ｅ、２ｆ、２ｇ、２ｈ、２ｉ、２ｊ、２ｋ、２ｌ　芯部
３、３ａ、３ｂ、３ｃ、３ｄ、３ｅ、３ｆ、３ｇ、３ｈ、３ｉ、３ｊ、３ｋ、３ｌ　鞘部
４、４ａ、４ｂ、４ｃ、４ｄ、４ｅ、４ｆ、４ｇ、４ｈ、４ｉ、４ｊ、４ｋ、４ｌ　アンカー部
５　根元部
６　広幅部
Ｗａ　狭幅部の幅
Ｗｂ　広幅部の幅 1 core- sheath conjugate fiber 2, 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k, 2l core portion 3, 3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l sheath part 4, 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h, 4i, 4j, 4k, 4l anchor part 5 root part 6 wide part Wa narrow part width Wb wide part Width of part

Claims (11)

  1. 　芯部が熱可塑性樹脂Ａ、鞘部が熱可塑性樹脂Ａ以外の熱可塑性樹脂Ｂからなる芯鞘複合繊維であって、複合繊維の横断面において、鞘部が、芯部内へと延びるアンカー部を有し、該アンカー部が、その根元部よりも広幅の広幅部を有するアンダーカット形状に形成されていることを特徴とする芯鞘複合繊維。 A core-sheath composite fiber having a core part made of a thermoplastic resin A and a sheath part made of a thermoplastic resin B other than the thermoplastic resin A, and in the cross section of the composite fiber, the sheath part has an anchor part extending into the core part. The core-sheath composite fiber is characterized in that the anchor portion is formed in an undercut shape having a wider portion than the root portion.
  2. 　前記アンカー部が、前記広幅部と根元部側の狭幅部との少なくとも二段幅構造に構成されている、請求項１に記載の芯鞘複合繊維。 The core-sheath conjugate fiber according to claim 1, wherein the anchor portion is configured in at least a two-stage width structure of the wide portion and a narrow portion on the base portion side.
  3. 　前記二段幅構造において、前記根元部側の狭幅部に対し前記広幅部の幅が１．５倍以上である、請求項２に記載の芯鞘複合繊維。 The core-sheath conjugate fiber according to claim 2, wherein, in the two-stage width structure, the width of the wide portion is 1.5 times or more with respect to the narrow portion on the root portion side.
  4. 　前記アンカー部が、複合繊維の横断面において、鞘部の繊維周方向に複数配列されている、請求項１～３のいずれかに記載の芯鞘複合繊維。 The core-sheath conjugate fiber according to any one of claims 1 to 3, wherein a plurality of the anchor portions are arranged in the fiber circumferential direction of the sheath portion in a cross section of the conjugate fiber.
  5. 　複合繊維の横断面における鞘部の面積比率が３０％以下である、請求項１～４のいずれかに記載の芯鞘複合繊維。 The core-sheath composite fiber according to any one of claims 1 to 4, wherein an area ratio of a sheath part in a cross section of the composite fiber is 30% or less.
  6. 　鞘部に要求される機能に関して、熱可塑性樹脂Ｂが熱可塑性樹脂Ａよりも高特性の樹脂からなる、請求項１～５のいずれかに記載の芯鞘複合繊維。 The core-sheath composite fiber according to any one of claims 1 to 5, wherein the thermoplastic resin B is made of a resin having higher characteristics than the thermoplastic resin A with respect to a function required for the sheath part.
  7. 　熱可塑性樹脂Ｂがフッ素系樹脂からなる、請求項６に記載の芯鞘複合繊維。 The core-sheath composite fiber according to claim 6, wherein the thermoplastic resin B is made of a fluororesin.
  8. 　熱可塑性樹脂Ｂがポリフェニレンサルファイドからなる、請求項６に記載の芯鞘複合繊維。 The core-sheath composite fiber according to claim 6, wherein the thermoplastic resin B is made of polyphenylene sulfide.
  9. 　繊維径が０．０５～５ｍｍの範囲にある、請求項１～８のいずれかに記載の芯鞘複合繊維。 The core-sheath composite fiber according to any one of claims 1 to 8, wherein the fiber diameter is in the range of 0.05 to 5 mm.
  10. 　請求項１～９のいずれかに記載の芯鞘複合繊維を用いてなる織物。 A woven fabric using the core-sheath composite fiber according to any one of claims 1 to 9.
  11. 　請求項１～９のいずれかに記載の芯鞘複合繊維を用いてなる水産資材。 A marine material using the core-sheath composite fiber according to any one of claims 1 to 9.
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JP2019026944A (en) * 2017-07-26 2019-02-21 東レ株式会社 Sheath-core composite fiber
JP2020105682A (en) * 2018-12-25 2020-07-09 東レ株式会社 Sheath-core composite fiber
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JP2020105682A (en) * 2018-12-25 2020-07-09 東レ株式会社 Sheath-core composite fiber
JP7415455B2 (en) 2018-12-25 2024-01-17 東レ株式会社 Core-sheath composite fiber
CN113699621A (en) * 2021-10-11 2021-11-26 南通新帝克单丝科技股份有限公司 Polyamide-polyester composite monofilament and preparation method thereof

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