CN113026139A - Black synthetic fiber - Google Patents
Black synthetic fiber Download PDFInfo
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- CN113026139A CN113026139A CN202011409094.XA CN202011409094A CN113026139A CN 113026139 A CN113026139 A CN 113026139A CN 202011409094 A CN202011409094 A CN 202011409094A CN 113026139 A CN113026139 A CN 113026139A
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- 229920002994 synthetic fiber Polymers 0.000 title claims abstract description 42
- 239000012209 synthetic fiber Substances 0.000 title claims abstract description 42
- 239000000835 fiber Substances 0.000 claims abstract description 52
- 239000006229 carbon black Substances 0.000 claims abstract description 35
- 239000002131 composite material Substances 0.000 claims abstract description 34
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 13
- 239000011342 resin composition Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 229920001519 homopolymer Polymers 0.000 claims description 9
- 229920005606 polypropylene copolymer Polymers 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 239000005977 Ethylene Substances 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 abstract description 35
- 239000004917 carbon fiber Substances 0.000 abstract description 35
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 23
- 235000019646 color tone Nutrition 0.000 description 15
- 238000011156 evaluation Methods 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 11
- 239000000306 component Substances 0.000 description 10
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 239000004594 Masterbatch (MB) Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 230000001953 sensory effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 239000002649 leather substitute Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 229920005653 propylene-ethylene copolymer Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Images
Classifications
-
- 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
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/34—Core-skin structure; Spinnerette packs therefor
-
- 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
- D01F1/04—Pigments
-
- 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
- D01F1/10—Other agents for modifying properties
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Multicomponent Fibers (AREA)
Abstract
The invention provides a black synthetic fiber yarn having an appearance close to that of carbon fiber. A plurality of sheath-core composite fibers (10) are bundled to form a multifilament, or the sheath-core composite fibers (10) are fused and integrated to form a monofilament having a sea-island structure in cross section, the fiber diameter of the sheath-core composite fiber (10) is 10 to 100 [ mu ] m, the sheath portion (12) and the core portion (11) are formed of thermoplastic resin compositions having different compositions from each other, and the ratio of the sheath portion (12) to the core portion (11) is the sheath portion in terms of volume ratio: core 20: 80-50: 50, carbon black is added only to the sheath portion (12), and the content of the carbon black in the sheath portion (12) is 0.2 to 1.5 mass%.
Description
Technical Field
The present invention relates to a black synthetic filament, and more particularly to a black synthetic filament composed of a sheath-core composite fiber containing carbon black.
Background
Carbon fibers are generally known as a reinforcing material for plastic molded articles, but sheath-core composite fibers using a thermoplastic resin can also be used for the purpose of suppressing production costs, providing flexibility, and the like. In addition, from the viewpoint of design, a black fiber-reinforced material having the same color tone and gloss as those of carbon fibers is required. Conventionally, synthetic fibers for woven fabrics and nonwoven fabrics are colored by mixing a black dye or carbon black with a raw material resin (see patent documents 1 and 2).
For example, patent document 1 discloses a polyester multifilament yarn dyed with a black dope for splitting using a sheath-core type composite fiber containing 5 to 10% by weight of carbon black having an average 1-order particle diameter in the range of 10 to 30nm in a polymer of a core component. Patent document 2 discloses an artificial leather produced using a sea-island type composite fiber filament in which the island component is a black dope dyed polyester containing 0.08 to 3.00 mass% of carbon black.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2008-163487
Patent document 2: japanese patent laid-open publication No. 2019-511644
Disclosure of Invention
Problems to be solved by the invention
However, the conventional black synthetic fibers have insufficient gloss, unlike carbon fibers, because of their different color tone. Specifically, in the fibers described in patent documents 1 and 2, since carbon black is added to the core component and the island component of the composite fiber, the absorption rate of visible light at the outermost surface of the fiber is low, and the reflected light at the interface with the sheath component and the sea component is also reduced, and thus the same glossiness as that of the carbon fiber cannot be obtained.
Accordingly, an object of the present invention is to provide a black synthetic fiber yarn having an appearance close to that of a carbon fiber.
Means for solving the problems
The black synthetic fiber yarn of the present invention is a multifilament yarn comprising a plurality of sheath-core composite fibers or a monofilament yarn having a sea-island structure in cross section obtained by fusing and integrating a plurality of sheath-core composite fibers, wherein the fiber diameter of the sheath-core composite fiber is 10 to 100 μm, the sheath portion and the core portion are formed of thermoplastic resin compositions having different compositions from each other, and the ratio of the sheath portion to the core portion is, in terms of volume ratio, the sheath portion: core 20: 80-50: 50, adding carbon black only to the sheath portion, wherein the content of the carbon black in the sheath portion is 0.2 to 1.5% by mass.
In the sheath-core type conjugate fiber, the thermoplastic resin used in the sheath portion is, for example, a homopolymer or copolymer of propylene or a homopolymer or copolymer of ethylene, and the thermoplastic resin used in the core portion is, for example, a homopolymer or copolymer of propylene, polyester or nylon.
The black synthetic fiber yarn of the present invention is the multifilament, and may have a Yellow Index (YI) of 14.0 or more and a glossiness of 2.0 or more at an incident angle of 20 °.
ADVANTAGEOUS EFFECTS OF INVENTION
By the present invention, a black synthetic fiber yarn having an appearance close to that of a carbon fiber can be realized.
Drawings
A, B in fig. 1 is a cross-sectional view showing an example of the structure of a sheath-core composite fiber used for a black synthetic fiber yarn according to embodiment 1 of the present invention.
A, B in fig. 2 is a cross-sectional view schematically showing an example of the structure of the black synthetic fiber yarn according to embodiment 1 of the present invention, where a is an example of a multifilament and B is an example of a monofilament.
A, B in FIG. 3 is a cross-sectional view schematically showing another example of the structure of the black synthetic fiber yarn according to embodiment 1 of the present invention, where A is an example of a multifilament and B is an example of a monofilament.
Description of the reference numerals
1 Black synthetic fiber (multifilament)
2 Black synthetic fiber (monofilament)
10 sheath core composite fiber
11 core part
12 sheath part
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below.
(embodiment 1)
First, a black synthetic fiber yarn according to embodiment 1 of the present invention will be described. The black synthetic fiber yarn of the present embodiment is a multifilament yarn composed of a plurality of sheath-core composite fibers, or a monofilament yarn obtained by fusing and integrating a plurality of sheath-core composite fibers. A, B in fig. 1 is a cross-sectional view showing an example of the structure of a sheath-core composite fiber used in the black synthetic fiber yarn of the present embodiment.
The sheath-core composite fiber 10 used for the black synthetic fiber yarn of the present embodiment includes not only a sheath portion 12 and a core portion 11 which are concentric as shown in a of fig. 1, but also an eccentric sheath-core type as shown in B of fig. 1. The sheath-core composite fiber 10 has a fiber diameter of 10 to 100 [ mu ] m, the sheath portion 12 and the core portion 11 are formed of thermoplastic resin compositions having different compositions from each other, and the ratio of the sheath portion 12 to the core portion 11 is, in terms of volume ratio, the sheath portion 12: core 11 ═ 20: 80-50: 50. in the sheath-core composite fiber 10, carbon black is added only to the sheath portion 12, and the content of carbon black in the sheath portion 12 is 0.2 to 1.5 mass%. Such a sheath-core composite fiber 10 can be formed by, for example, melt spinning.
Fig. 2 and 3 are cross-sectional views schematically showing structural examples of black synthetic fiber yarns according to the present embodiment, wherein a in fig. 2 and a in fig. 3 are examples of multifilaments, and B in fig. 2 and B in fig. 3 are examples of monofilaments. In the case where the black synthetic fiber of the present embodiment is the multifilament 1, tens to hundreds of sheath-core composite fibers 10 having the structure shown in A, B of fig. 1 are bundled to form 1 filament. The outer shape of the multifilament 1 is not particularly limited, and may be a substantially circular shape in cross section as shown in a of fig. 2, a ribbon shape as shown in a of fig. 3, or an elliptical shape in cross section.
In the case where the black synthetic fiber of the present embodiment is the monofilament 2, several tens to several hundreds of sheath-core composite fibers 10 are fused or thermally fused to form 1 filament. In the monofilament 2, the sheath portion 12 of each sheath-core composite fiber 10 is melted and integrated, and the cross section is a so-called sea-island structure in which islands formed of a high-melting-point resin component derived from the core 11 are present in sea portions formed of a low-melting-point resin component derived from the sheath portion 12. The outer shape of the monofilament 2 is not particularly limited, and may be circular in cross section as shown in B of fig. 2, or a ribbon shape as shown in B of fig. 3, or may be elliptical in cross section.
[ fiber diameter: 10 to 100 μm ]
When the diameter of the sheath-core composite fiber 1 is less than 10 μm, the sheath portion 12 becomes too thin, and the brightness (L value) of the black synthetic fiber filament becomes high. When the diameter of the sheath-core composite fiber 1 exceeds 100 μm, the sheath portion 12 becomes too thick, and the yellow index (YI value) and the glossiness of the black synthetic fiber filament are lowered.
[ core part 11]
The core 11 is formed of a thermoplastic resin composition containing, for example, a homopolymer or copolymer of propylene, polyester, nylon, or the like as a resin component and not containing a coloring agent such as carbon black, black dye, or the like. When the colorant is added to the core 11, the absorption rate of visible light in the core 11 becomes high, and the glossiness of the black synthetic fiber yarn is lowered.
[ sheath portion 12]
The sheath portion 12 is formed of a thermoplastic resin composition containing 0.2 to 1.5 mass% of carbon black as a resin component, for example, a homopolymer or copolymer of propylene or a homopolymer or copolymer of ethylene. The resin component of the thermoplastic resin composition forming the sheath portion 12 may be the same as or different from the resin component of the thermoplastic resin composition forming the core portion 11.
When the content of carbon black contained in the sheath portion 12 is less than 0.2 mass%, the brightness (L value) of the black synthetic fiber filament becomes too high, and the L value exceeds the upper limit 40 of the carbon fiber. When the carbon black content in the sheath portion 12 exceeds 1.5 mass%, the brightness (L value) of the black synthetic fiber filament becomes too low, and the L value becomes less than the lower limit 20 of the carbon fiber. The carbon black content in the sheath portion 12 is preferably 0.2 to 1.0 mass% from the viewpoint of production cost and productivity.
Further, the type of carbon black contained in the sheath portion 12 is not particularly limited, and for example, known carbon black such as ketjen black and acetylene black can be used. Further, since the surface area decreases and the blackness of the black synthetic fiber yarn decreases as the particle diameter of the carbon black increases, it is preferable to use carbon black having a particle diameter of 50nm or less as the carbon black contained in the sheath portion 12. The particle diameter referred to herein is a value obtained by taking an image of primary particles of carbon black by a transmission electron microscope, measuring the particle diameter of each particle by a visual measurement method from the image, and averaging the measured particle diameters.
[ sheath portion 12: core 11 ═ 20: 80-50: 50]
When the ratio of the core portion 11 in the sheath-core composite fiber 1 is less than 50% by mass, the sheath portion 12 becomes too thick, and the yellow index (YI value) and the glossiness of the black synthetic fiber yarn are lowered. When the proportion of the core portion 11 exceeds 80 mass%, the sheath portion 12 becomes too thin, and the brightness (L value) of the black synthetic fiber yarn becomes high. As a result, a black synthetic fiber yarn having a color tone and a gloss close to those of carbon fibers can be easily obtained. For the above reasons, in the black synthetic fiber of the present embodiment, the ratio of the sheath portion 12 to the core portion 11 in the sheath-core composite fiber 1 is set to be the sheath portion 12: core 11 ═ 20: 80-50: 50.
[ color tone/gloss of multifilament ]
The black synthetic fiber yarn of the present embodiment is black even when it is a monofilament, but by adopting a form of a multifilament, it is possible to obtain a color tone and a gloss closer to those of carbon fiber. Specifically, a black synthetic filament having a Yellow Index (YI) of 14.0 or more and a glossiness of 2.0 or more with respect to an incident angle of 20 ° can be realized. The black synthetic fiber yarn (multifilament yarn) having such color characteristics can provide an appearance closer to that of carbon fiber when processed into a molded article or the like. The color tone of the multifilament can be measured by an ultraviolet-visible spectrophotometer (halogen lamp light source manufactured by japan spectrophotometers), and the gloss of the multifilament can be measured by a gloss meter (tungsten bulb light source manufactured by Suga Test Instruments co., ltd.).
As described above in detail, since the black synthetic fiber yarn according to the present embodiment is composed of the sheath-core type composite fiber in which a specific amount of carbon black is blended only in the sheath portion, the color tone and the glossiness are excellent as compared with the case where carbon black is blended only in the core portion in the entire fiber, and the appearance closer to the carbon fiber can be obtained.
(embodiment 2)
Next, a molded body according to embodiment 2 of the present invention will be described. The molded article of the present embodiment is formed using the black synthetic fiber yarn of embodiment 1, and examples thereof include a knitted fabric formed of black synthetic fiber yarn, which is molded into a predetermined shape by hot working, a sheet-like laminate in which the knitted fabric or yarn is directly laminated with a film, and a molded article in which the knitted fabric or yarn is directly laminated with a resin material or a metal material, which is molded into a predetermined shape.
The molded body of the present embodiment uses a black synthetic fiber yarn formed of a sheath-core type composite fiber in which a specific amount of carbon black is blended only in the sheath portion, and therefore, in addition to the reinforcing effect, an appearance closer to that of a carbon fiber can be obtained.
Examples
The effects of the present invention will be specifically described below by referring to examples and comparative examples. In the present example, the black synthetic fiber yarns of the examples and comparative examples were produced under the conditions shown in table 1 below, and the color tone and the glossiness thereof were compared with those of carbon fibers and evaluated. In this case, the number of filaments of the multifilament (the number of bundled single fibers) and the number of single fibers used for producing the single fibers (the number of single fibers per 1 single fiber) were both set to 120.
[ Table 1]
Among the main raw materials of the sheath-core composite fibers shown in table 1, PP was Prime Polymer co., polypropylene Y2000GV manufactured by ltd, co-PP was Prime Polymer co., propylene-ethylene copolymer Y2045GP manufactured by ltd, and PET was polyethylene terephthalate NEH2050 manufactured by Unitika ltd. As Carbon BLACK (CB), a colorant master stock TPM 9BB019 BLACK MF manufactured by Tokyo Ink co. The carbon black content shown in table 1 is calculated from the amount of carbon black in the masterbatch and the amount of masterbatch added to the sheath raw material.
< color tone >
(1) Device-based assays
The carbon fiber of the reference example (carbon fiber "TORAYCA" manufactured by Toray corporation, T300B-6000-50B) and the filaments of the examples and comparative examples were arranged on a flat plate without gaps, respectively, and the reflectance was measured at a wavelength of 300 to 1000nm using an ultraviolet-visible spectrophotometer (halogen lamp light source manufactured by Nippon Spectrum corporation), and the luminance (L value) and the yellow index (YI value) were calculated from the obtained spectra.
(2) Sensory evaluation
The carbon fibers of the reference example and the filaments of the examples and comparative examples were arranged on a flat plate without gaps, and placed under an electric lamp light of 20 lux, and 5 panelists who experienced fiber evaluation for 1 year or more were allowed to visually observe the flat plate from the vertical direction to determine whether or not the color tone of the evaluation target filament is similar to that of the carbon fibers. In the evaluation, the whole reviewer confirms the following judgment principles: in the visual observation, the one that could not be distinguished from the carbon fiber of the reference example (could not be distinguished from the carbon fiber) was judged to be "approximate", and the other one (could be distinguished from the carbon fiber) was judged to be "not approximate". Further, the evaluation results of all the panelists (5 panelists) were rated as "approximate", the evaluation results of 3 or 4 panelists rated as "approximate" were rated as "Δ", and the evaluation results of 2 or less panelists rated as "approximate" were rated as "x".
< gloss >
(1) Device-based assays
The carbon fibers of the reference example and the filaments of the examples and comparative examples were arranged on a flat plate without gaps, and the filaments were irradiated with incident light of 20 °, 60 °, and 85 ° in the longitudinal direction by a gloss meter (tungsten bulb light source manufactured by Suga Test Instruments co., ltd.) to measure the gloss.
(2) Sensory evaluation
The carbon fibers of the reference example and the respective filaments of the examples and comparative examples were arranged on a flat plate without gaps, and placed under an electric lamp light of 20 lux, and 5 panelists who experienced fiber evaluation for 1 year or more were allowed to visually observe the fibers from a direction perpendicular to the flat plate and inclined at 20 ° in the longitudinal direction of the respective filaments, and thereby judged whether or not the glossiness of the evaluation-target filaments was similar to the glossiness of the carbon fibers. In the evaluation, the whole reviewer confirms the following judgment principles: in the visual observation, the one that could not be distinguished from the carbon fiber of the reference example (could not be distinguished from the carbon fiber) was judged to be "approximate", and the other one (could be distinguished from the carbon fiber) was judged to be "not approximate". Further, the evaluation results of all the panelists (5 panelists) were rated as "approximate", the evaluation results of 3 or 4 panelists rated as "approximate" were rated as "Δ", and the evaluation results of 2 or less panelists rated as "approximate" were rated as "x".
The above evaluation results are summarized in table 2 below.
[ Table 2]
As shown in table 2, the yarn (multifilament) of comparative example 1, in which carbon black was added only to the core, had a color tone close to that of the carbon fiber of the reference example, but had a different gloss. The yarn (multifilament) of comparative example 2, in which carbon black was added to both the sheath portion and the core portion, had a different color tone and gloss from the carbon fiber of the reference example. The yarn (monofilament) of comparative example 3 in which carbon black was added only to the core and the yarn (multifilament) of comparative example 4 in which a single fiber was used were different in color tone and glossiness from the carbon fiber of the reference example. Further, the filaments (multifilaments) of comparative example 5, in which carbon black was added only to the sheath portion but the amount of addition did not satisfy the range of the present invention, had similar glossiness to the carbon fibers of the reference example, but had different color tones.
In contrast, the filaments of examples 1-9 had a color tone and gloss similar to those of the carbon fibers of the reference example. In particular, the multifilaments of examples 1 to 7 had an appearance similar to that of the carbon fiber of the reference example. From the above results, it was confirmed that the present invention can realize a black synthetic fiber yarn having an appearance close to that of a carbon fiber.
Claims (4)
1. A black synthetic fiber yarn which is a multifilament yarn comprising a plurality of sheath-core composite fibers or a monofilament yarn having a sea-island structure in cross section and formed by fusing and integrating a plurality of sheath-core composite fibers,
the sheath-core type composite fiber has a fiber diameter of 10 to 100 μm,
the sheath portion and the core portion are formed of thermoplastic resin compositions different in composition from each other,
the ratio of the sheath part to the core part is calculated as the sheath part by volume ratio: core 20: 80-50: 50,
carbon black is added only to the sheath portion, and the content of the carbon black in the sheath portion is 0.2 to 1.5 mass%.
2. The black synthetic filament according to claim 1,
in the sheath-core type composite fiber,
the thermoplastic resin of the sheath part is a homopolymer or a copolymer of propylene or a homopolymer or a copolymer of ethylene,
the thermoplastic resin of the core is a homopolymer or copolymer of propylene, polyester or nylon.
3. The black synthetic fiber yarn according to claim 1 or 2, which is the multifilament, and has a yellow index YI of 14.0 or more and a glossiness of 2.0 or more with respect to an incident angle of 20 °.
4. A formed body formed by using the black synthetic fiber yarn according to any one of claims 1 to 3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019233808A JP6743266B1 (en) | 2019-12-25 | 2019-12-25 | Black synthetic fiber yarn |
| JP2019-233808 | 2019-12-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113026139A true CN113026139A (en) | 2021-06-25 |
Family
ID=72048010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011409094.XA Pending CN113026139A (en) | 2019-12-25 | 2020-12-03 | Black synthetic fiber |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6743266B1 (en) |
| CN (1) | CN113026139A (en) |
| TW (1) | TW202124798A (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09170148A (en) * | 1995-11-02 | 1997-06-30 | Hoechst Celanese Corp | Giogrid consisting of two component fiber of polyethylene terephthalate and polyolefin and its preparation |
| JPH09228151A (en) * | 1996-02-20 | 1997-09-02 | Kuraray Co Ltd | High-specific gravity and high-strength conjugate fiber and its production |
| JP2000008225A (en) * | 1998-06-16 | 2000-01-11 | Toyobo Co Ltd | Elastic conjugate filament excellent in flame retardance |
| JP2002235245A (en) * | 2001-02-09 | 2002-08-23 | Kuraray Co Ltd | Electroconductive conjugate fiber |
| JP2006097145A (en) * | 2004-09-28 | 2006-04-13 | Kanebo Ltd | Fiber composite material and use thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW202124798A (en) | 2021-07-01 |
| JP2021102821A (en) | 2021-07-15 |
| JP6743266B1 (en) | 2020-08-19 |
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