CN106133214B - Profiled cross-section fiber - Google Patents
Profiled cross-section fiber Download PDFInfo
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- CN106133214B CN106133214B CN201580017035.9A CN201580017035A CN106133214B CN 106133214 B CN106133214 B CN 106133214B CN 201580017035 A CN201580017035 A CN 201580017035A CN 106133214 B CN106133214 B CN 106133214B
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- 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
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
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- 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
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
Abstract
The invention provides a profiled fiber which is divided and used and can efficiently produce a micro composite fiber. The present invention relates to a profiled cross-section fiber having: (1) a plurality of conjugate fiber structures comprising a 1 st thermoplastic resin and a 2 nd thermoplastic resin having a melting point or a softening point lower than that of the 1 st thermoplastic resin, and (2) a connecting member comprising a 3 rd thermoplastic resin having a melting point or a softening point higher than that of the 2 nd thermoplastic resin, wherein at least two conjugate fiber structures are connected by the connecting member in an arbitrary fiber cross section.
Description
Technical Field
The invention relates to a special profiled cross-section fiber. More specifically, the present invention relates to a modified cross-section fiber which has excellent splittability and in which a micro-composite fiber structure of modified cross-section fibers after splitting can be derived as a micro-composite fiber structure separately and independently.
Background
Various splittable conjugate fibers have been studied. For example, patent literature (PTL)1 proposes: the splittability is improved by using, as one component of the polyolefin-based resin, a resin containing 1 to 30% by weight of an ethylene-vinyl alcohol copolymer having a saponification degree of 95% or more, in a splittable conjugate fiber comprising the polyolefin-based resin. Patent document 2 proposes: a thermoplastic resin comprising two components different in heat shrinkage rate easily divides the resin by utilizing the difference in heat shrinkage during heat treatment. However, in both patent document 1 and patent document 2, the divided fibers have a monocomponent (monocomponent), the thermal bonding points during the formation of the nonwoven fabric are reduced, and the strength of the nonwoven fabric is far from sufficient.
Patent document 3 proposes a splittable conjugate fiber having a cross-sectional structure in which a monocomponent (a) and a component (B) of a composite structure including a core component and a sheath component are alternately arranged, and which maintains the form of the sheath-core composite structure even in a part after splitting. Therefore, a part of the fibers of the composite structure remains after the division.
Documents of the prior art
Patent document
Patent document 1: JP 2002-088583A
Patent document 2: JP 2006 plus 328628A
Patent document 3: JP 2011-009150A
Disclosure of Invention
Problems to be solved by the invention
However, in the splittable conjugate fiber according to patent document 3, since the outer periphery of the fiber cross section perpendicular to the longitudinal direction of the splittable conjugate fiber is circular, and the fiber has a structure in which the bonding area between the component a and the component B is substantially inevitably increased, and so on, and therefore high external stress such as jetting of high-pressure water flow should be applied during splitting, further improvement of the splittability is expected.
Accordingly, an object of the present invention is to provide a modified cross-section fiber which can be used particularly by being divided and then efficiently manufactured as a micro composite fiber.
Means for solving the problems
The present inventors have made extensive studies to solve the above-mentioned problems, and as a result, have found that a profiled fiber having a structure in which at least two composite fiber structures are connected by a connecting body can achieve a desired object, and have completed the present invention.
More specifically, the present invention has the following configuration.
[1] A profiled cross-section fiber having:
(1) a plurality of conjugate fiber structures comprising a 1 st thermoplastic resin and a 2 nd thermoplastic resin having a melting point or a softening point lower than that of the 1 st thermoplastic resin, and
(2) a connected body containing a 3 rd thermoplastic resin having a melting point or a softening point higher than that of the 2 nd thermoplastic resin,
wherein at least two of the composite fiber structures are connected by the connecting member in an arbitrary fiber cross section.
[2] The profiled-section fiber according to [1], wherein the connected body further contains the 2 nd thermoplastic resin, and has a configuration in which an outer periphery of the 3 rd thermoplastic resin is covered with the 2 nd thermoplastic resin.
[3] The modified cross-sectional fiber according to [1] or [2], wherein the cross-sectional shape of the conjugate fiber structure is substantially circular or polygonal.
[4] The modified cross-section fiber according to any one of [1] to [3], which has 2 to 6 conjugate fiber structures.
[5] The profiled-section fiber according to any one of [1] to [4], wherein the 1 st thermoplastic resin and the 3 rd thermoplastic resin are the same resin.
[6] The irregularly-shaped cross-sectional fiber according to any one of [1] to [5], wherein the 2 nd thermoplastic resin occupies the surface of the conjugate fiber structure except for a portion connected to the connected body.
[7] The profiled-section fiber according to any one of [2] to [6], wherein the 3 rd thermoplastic resin occupies 20% or more of the section of the joined body.
[8] The modified cross-section fiber according to any one of [2] to [7], wherein the 2 nd thermoplastic resin contained in the connected body and the 2 nd thermoplastic resin contained in the conjugate fiber structure are melted and merged together.
[9] The profiled-section fiber according to any one of [1] to [8], having a configuration of: 3 of the conjugate fiber structures arranged at substantially equal intervals around the central 1 of the conjugate fiber structures are connected to the central 1 of the conjugate fiber structures by the connecting member.
[10] The modified cross-section fiber according to any one of [1] to [9], wherein in terms of the relationship between 1 of the composite fiber structures and 1 of the connected bodies connected thereto, the length of the connecting portion between the composite fiber structure and the connected body in the arbitrary fiber cross section of the modified cross-section fiber is 65% or less than 65% of the outer peripheral length of the composite fiber structure.
ADVANTAGEOUS EFFECTS OF INVENTION
The profiled-section fiber according to the present invention has excellent gloss and concealing properties of the fiber, and excellent moisture-draining properties. In particular, the irregular cross-section fiber of the present invention can be used after the division to efficiently produce a fine composite fiber. Further, by using a composite fiber derived from the divided irregularly shaped cross-section fiber, a high-strength nonwoven fabric can be obtained.
Drawings
Fig. 1(a) to 1(f) show schematic views of fiber sections perpendicular to the long axis direction of the irregularly-shaped cross-section fiber according to the present invention.
FIG. 2 is a fluorescence micrograph (magnification: 20) of a fiber cross section perpendicular to the long axis direction of the irregularly-sectioned fiber obtained in example 1.
FIG. 3 is a Scanning Electron Microscope (SEM) photograph (magnification: 1,000) showing the state of division of the irregularly-shaped cross-section fiber obtained in example 1.
[ description of reference numerals ]
1A, 1B, 1C, 1D, 1F: profiled cross-section fiber
11: no. 1 thermoplastic resin
12: 2 nd thermoplastic resin
13: no. 3 thermoplastic resin
14: composite fiber structure
15: connection body
X: bonding length between the composite fiber structure 14 and the connected body 15
Y: maximum width of the composite fiber structure 14
Z: the length of the connection portion between the composite fiber structure 14 and the connection member 15
Detailed Description
The present invention will be described in more detail below.
The fiber according to the present invention is a modified cross-section fiber having a plurality of conjugate fiber structures, and the modified cross-section fiber is divided into a plurality of fine conjugate fibers.
The profiled-section fiber according to the present invention has: (1) a plurality of conjugate fiber structures comprising a 1 st thermoplastic resin and a 2 nd thermoplastic resin having a melting point or a softening point lower than that of the 1 st thermoplastic resin, and (2) a connecting member comprising a 3 rd thermoplastic resin having a melting point or a softening point higher than that of the 2 nd thermoplastic resin, wherein at least 2 conjugate fiber structures are connected by the connecting member in an arbitrary fiber cross section.
In the present invention, a cross section perpendicular to the longitudinal direction of the fiber is referred to as a "cross section" or a "fiber cross section".
The irregular shape of the irregular cross-section fiber is not particularly limited as long as the fiber has the above-described structure. However, in order to facilitate understanding of the present invention, examples of the cross section of the irregularly-shaped cross-sectional fiber of the present invention are shown in fig. 1(a) to 1 (f).
Specific examples of the modified cross-section fiber according to the present invention include modified cross-section fibers 1A, 1B, 1C, 1D, 1E and 1F shown in fig. 1(a) to 1(F), respectively. In any fiber cross section of the modified cross-section fibers 1A to 1F, a plurality of conjugate fiber structures 14 including a 1 st thermoplastic resin 11 and a 2 nd thermoplastic resin 12 having a melting point or a softening point lower than that of the 1 st thermoplastic resin 11 are connected by a connecting member 15, and the connecting member 15 includes a 3 rd thermoplastic resin 13 having a melting point or a softening point higher than that of the 2 nd thermoplastic resin 12. In a profiled cross-section fiber, the shape of the fiber cross-section may be geometrically or mechanically symmetric or asymmetric.
In fig. 1(a) to 1(f), the number of the composite fiber structures 14 is 2 to 4, but the number of the composite fiber structures in the present invention is not particularly limited, and is only 2 or more. The number of the conjugate fiber structures 14 is preferably 2 to 6, and more preferably 3 to 6, from the viewpoint of the structure of the spinning nozzle used in the production of the modified cross-section fiber and the maintenance of the modified cross-section structure during spinning.
First, as shown in fig. 1(C) and 1(F), the irregularly-shaped cross-sectional fibers 1C and 1F having the structure in which the fibers easily hold the irregularly shaped shape and the splittability is improved are particularly preferably configured such that 3 composite fiber structures 14 arranged around 1 composite fiber structure 14 located at the center thereof at substantially equal intervals are connected to 1 composite fiber structure 14 located at the center by a connecting member 15.
Further, if the number of the composite fiber structures 14 becomes excessively high, the configuration of the irregularly-shaped cross-section fibers becomes complicated, and high external stress must be applied during division in some cases.
In the present invention, the conjugate fiber structure 14 is preferably a sheath-core conjugate fiber containing the 1 st thermoplastic resin 11 as a core component and the 2 nd thermoplastic resin 12 as a sheath component, or a parallel (parallel type) conjugate fiber in which the 2 nd thermoplastic resin 12 occupies 30% or more of the fiber outer periphery. When the composite fiber structure 14 is a sheath-core composite fiber, the 2 nd thermoplastic resin 12 only needs to occupy the outer periphery of the composite fiber, and the composite fiber may be concentric or eccentric.
The cross-sectional shape of the conjugate fiber structure 14 is preferably substantially circular or polygonal. If the fiber cross section is substantially circular or polygonal, the bonding area during the thermal bonding process of the 1 st thermoplastic resin 11 and the 2 nd thermoplastic resin 12 can be increased.
The structure of the connected body 15 is not particularly limited, and may be formed of only the 3 rd thermoplastic resin 13 as shown in fig. 1(a) to 1(c), or may be formed of the 3 rd thermoplastic resin 13 and any other thermoplastic resin (for example, the 2 nd thermoplastic resin 12) as shown in fig. 1(d) to 1 (f). Particularly from the viewpoint of being melted and incorporated with the conjugate fiber structure 14, any other thermoplastic resin preferably includes the 2 nd thermoplastic resin.
When the connected body 15 is formed of the 3 rd thermoplastic resin 13 and any other thermoplastic resin (the 2 nd thermoplastic resin 12), the connected body 15 preferably has a configuration in which the 2 nd thermoplastic resin 12 covers the periphery of the 3 rd thermoplastic resin 13.
When the connected member 15 includes the 3 rd thermoplastic resin 13 and the 2 nd thermoplastic resin 12, particularly when the connected member 15 has a structure in which the 2 nd thermoplastic resin 12 covers the periphery of the 3 rd thermoplastic resin 13, the connected member 15 has the following structure: in any cross section perpendicular to the longitudinal direction of the irregularly-sectioned fiber, the 3 rd thermoplastic resin 13 and the 2 nd thermoplastic resin 12 are in contact with each other at the interface. Preferably, the 3 rd thermoplastic resin 13 occupies 20% or more of the cross section of the connected body 15. The ratio of the 3 rd thermoplastic resin 13 in the cross section of the connected member 15 is more preferably 60% to 100%, and most preferably 80% to 100%. When the ratio is in the above range, the splittability between the conjugate fiber structure 14 and the connecting body 15 is improved, and therefore the irregularly-shaped cross-section fibers 1A to 1F can be easily split.
When the connected body 15 contains the 3 rd thermoplastic resin 13 and the 2 nd thermoplastic resin 12, it is preferable that the 2 nd thermoplastic resin 12 contained in the composite fiber structure 14 and the 2 nd thermoplastic resin 12 contained in the connected body 15 are melted and united at their contact surfaces. When the composite fiber structure 14 and the connected body 15 are melted and united at the contact surface, the process stability during spinning becomes satisfactory.
The length of the connecting member 15 is not particularly limited. For example, in the case of a fiber having a fineness of 5dtex to 30dtex in an undrawn fiber, the length is in the range of 2 micrometers to 10 micrometers, and preferably in the range of 4 micrometers to 8 micrometers, from the viewpoint of spinnability and retention of a deformed cross-sectional shape. When the length is in the range, the process stability during spinning becomes satisfactory, and therefore such a length is preferable.
In the present invention, when the resins on the contact surfaces between the conjugate fiber structure 14 and the connected body 15 are melted and joined together, the length of the 3 rd thermoplastic resin 13 in the direction toward the conjugate fiber structure 14 is defined as the length of the connected body, and the 3 rd thermoplastic resin 13 connects 2 conjugate fiber structures 14 in the cross section perpendicular to the longitudinal direction of the irregularly-shaped cross-sectional fiber. In the following, the direction toward the conjugate fiber structure may be referred to as "the longitudinal direction of the connected body" in some cases.
From the viewpoint of separability, the bonding area between the conjugate fiber structure 14 and the connecting member 15 is preferably small. The smaller the bonding area between the composite fiber structure 14 and the connected body 15, the less external stress is required during the division, and thus the easier the division is.
The bonding length X (see fig. 1a and 1 d) between the conjugate fiber structure 14 and the connected body 15 in the cross section of the irregularly-shaped cross-sectional fiber is preferably equal to or less than the maximum width Y (see fig. 1a and 1 d) of the conjugate fiber structure 14 in the direction perpendicular to the longitudinal direction of the connected body (when the conjugate fiber structure is circular, the diameter thereof). When the bonding length X is equal to or less than the maximum width Y of the conjugate fiber structure, the division is easy. From the viewpoint of handling stability during spinning and ease of separation, the bonding length X is preferably in the range of 50% to 95% of the maximum width Y of the conjugate fiber structure in the direction perpendicular to the longitudinal direction of the connected body, and more preferably in the range of 60% to 90% of the maximum width Y.
In the present invention, in the relationship between 1 composite fiber structure 14 and 1 connecting member 15 connected thereto, the length Z of the connecting portion between the composite fiber structure 14 and the connecting member 15 in the fiber cross section (see fig. 1(a) and 1(d)) is preferably 65% or less of the outer peripheral length of the composite fiber structure 14, and more preferably 50% to 15% of the outer peripheral length. When the length Z of the coupling portion is in the range, the division is easy, and therefore such a length is preferable. Here, the connecting portion means a contact portion between the composite fiber structure 14 and the connecting member 15. The length Z of the connection portion means the length of the contact portion between the conjugate fiber structure 14 and the connection member 15 in the fiber cross section. As shown in fig. 1(d), when the connected body is formed of the 3 rd thermoplastic resin 13 and any other thermoplastic resin (for example, the 2 nd thermoplastic resin 12), the length Z of the connecting portion means the length of the contact portion when the composite fiber structure 14 is assumed to maintain the original structure. The outer circumferential length of the composite fiber structure 14 means an estimated length when only the composite fiber structure 14 is observed.
In the present invention, all of the 1 st thermoplastic resin, the 2 nd thermoplastic resin and the 3 rd thermoplastic resin may be different resins, but the 3 rd thermoplastic resin is preferably the same as the 1 st thermoplastic resin from the viewpoint of processability or improvement in splittability.
As described above, the melting point or softening point of the 2 nd thermoplastic resin 12 is lower than the melting point or softening point of the 1 st thermoplastic resin 11, and specifically, a resin having a melting point or softening point lower than the melting point of the 1 st thermoplastic resin 11 by 15 to 150 ℃ is preferably used, and a resin having a melting point or softening point lower than the melting point of the 1 st thermoplastic resin 11 by 30 to 130 ℃ is more preferably used. If the melting point or softening point is in the temperature range, a thermal bonding treatment using a difference in melting point or softening point may be performed. In the present invention, the thermoplastic resin used is generally selected based on the temperature of the melting point, while the thermoplastic resin having no melting point adopts a softening point.
The 1 st to 3 rd thermoplastic resins used in the modified cross-section fiber according to the present invention are not particularly limited as long as they satisfy the requirements of melting point or softening point. It is preferable to use a resin that can form fibers, such as: a polyester resin; polyamide resins (nylon); a polyolefin-based resin; Acrylonitrile-Butadiene-Styrene (ABS) resin; Acrylonitrile-Styrene (AS) resin; a polystyrene resin; an acrylic resin; a polycarbonate; polyphenylene ether; a polyacetal; polyphenylene sulfide; polyether ether ketone; a liquid crystalline polymer; a fluorocarbon resin; a urethane resin; and an elastomer, and more preferably a polyolefin resin or a polyester resin is used. In addition, the thermoplastic resin may be prepared by combining a plurality of kinds from among the resins.
Specific examples of the polyolefin-based resin that can be used in the modified cross-section fiber according to the present invention are described below, but the polyolefin-based resin is not particularly limited thereto.
For example, polyethylene, polypropylene, polybutene-1, polyhexene-1, polyoctene-1, poly (4-methylpentene-1), polymethylpentene, 1, 2-polybutadiene, 1, 4-polybutadiene, etc. may be used, and further, under the condition that α -olefin is a component other than the monomers constituting the homopolymer, a small amount of α -olefin such as ethylene, propylene, butene-1, hexene-1, octene-1 or 4-methylpentene-1 may be contained as a copolymer component in the homopolymer, a small amount of other ethylenically unsaturated monomer such as butadiene, isoprene, 1, 3-pentadiene, styrene and α -methylstyrene may be contained as a copolymer component, and two or more of the polyolefin resins may be mixed and used.
As the resin, not only a polyolefin-based resin polymerized by a general Ziegler-Natta (Ziegler-Natta) catalyst but also a polyolefin-based resin polymerized by a metallocene catalyst may be preferably used. The melt Mass flow rate (hereinafter abbreviated as mfr (melt Mass flowrate)) of the polyolefin resin to be preferably used is not particularly limited as long as it is within a range in which fibers can be spun, but is preferably 1g/10min to 100g/10min, and more preferably 5g/10min to 70g/10 min.
The polyolefin-based resin that can be used in the modified cross-section fiber of the present invention preferably includes at least one polyolefin-based resin selected from the group consisting of polyethylene, polypropylene, and a copolymer containing propylene as a main component. Specific examples of the polyolefin-based resin include: high-density polyethylene, linear low-density polyethylene, polypropylene (propylene homopolymer), ethylene-propylene copolymer containing propylene as a main component, and ethylene-propylene-butene-1 copolymer containing propylene as a main component. The phrase "copolymer comprising propylene as a main component" means a copolymer in which propylene units account for the largest amount in the copolymer components constituting the copolymer.
The physical properties of the polyolefin other than the MFR (for example, physical properties such as a Q value (weight average molecular weight/number average molecular weight), Rockwell hardness (Rockwell hardness), and the number of branched methyl chains) are not particularly limited as long as the properties satisfy the requirements according to the present invention.
The polyester-based resin usable in the modified cross-section fiber according to the present invention can be obtained by polycondensation of a diol and a dicarboxylic acid. Specific examples of the dicarboxylic acid used for the polycondensation of the polyester resin include: terephthalic acid, isophthalic acid, 2, 6-naphthalenedicarboxylic acid, adipic acid and sebacic acid. Specific examples of the diols used include: ethylene glycol, diethylene glycol, 1, 3-propanediol, 1, 4-butanediol, neopentyl glycol and 1, 4-cyclohexanedimethanol.
As the polyester-based resin that can be used in the irregularly-shaped cross-section fiber of the present invention, polyethylene terephthalate, polypropylene terephthalate, or polybutylene terephthalate can be preferably used. In addition, in addition to aromatic polyesters, aliphatic polyesters may be used. Specific examples of preferred aliphatic polyesters include: polylactic acid or polybutylene succinate. The polyester resin may be not only a homopolymer but also a copolyester (copolyester). In this case, as the copolymerization component, for example, dicarboxylic acid components such as adipic acid, sebacic acid, phthalic acid, isophthalic acid and 2, 6-naphthalenedicarboxylic acid, diol components such as diethylene glycol and neopentyl glycol, or optical isomers such as L-lactic acid can be used. Specific examples of such copolymers include polybutylene terephthalate adipate and the like. Further, two or more of the polyester resins may be mixed and used. In consideration of the cost of raw materials and the thermal stability of the obtained fiber, the resin used in the present conjugate fiber is most preferably an unmodified polymer composed only of polyethylene terephthalate.
Additives such as antioxidants, light stabilizers, ultraviolet absorbers, neutralizing agents, nucleating agents, epoxy stabilizers, lubricants, antibacterial agents, flame retardants, antistatic agents, pigments, and plasticizers may be further added to the thermoplastic resin as needed within a range that does not adversely affect the advantageous effects of the present invention.
Examples of combinations of resins constituting the profiled-section fiber according to the present invention are set forth below, but the combinations are not particularly limited. From the viewpoint of processability, the 1 st thermoplastic resin and the 3 rd thermoplastic resin are preferably the same. When the connected body includes the 2 nd thermoplastic resin and the 3 rd thermoplastic resin, the 2 nd thermoplastic resin contained in the conjugate fiber structure and the 2 nd thermoplastic resin contained in the connected body are the same resin.
Under the condition that the 1 st thermoplastic resin and the 3 rd thermoplastic resin have higher melting points than the 2 nd thermoplastic resin, specific examples of the combination of (the 1 st thermoplastic resin and the 3 rd thermoplastic resin) - (the 2 nd thermoplastic resin) include: polypropylene-high density polyethylene, polypropylene-low density polyethylene, polypropylene-linear low density polyethylene, ethylene-propylene copolymer-high density polyethylene, ethylene-propylene copolymer-low density polyethylene, ethylene-propylene copolymer-linear low density polyethylene, polyethylene terephthalate-ethylene-propylene copolymer, polyethylene terephthalate-polypropylene, polyethylene terephthalate-high density polyethylene, polyethylene terephthalate-linear low density polyethylene, polyethylene terephthalate-low density polyethylene, polybutylene terephthalate-high density polyethylene, polybutylene terephthalate-low density polyethylene, polybutylene terephthalate-linear low density polyethylene, polyethylene terephthalate, polybutylene terephthalate-polypropylene, polybutylene terephthalate-ethylene-propylene copolymer, polybutylene terephthalate-polyethylene terephthalate, and the like. More preferred combinations among these are polypropylene-high density polyethylene, or polyethylene terephthalate-high density polyethylene.
Examples of the combination of (1 st thermoplastic resin) - (2 nd thermoplastic resin) - (3 rd thermoplastic resin) under the condition that the 1 st thermoplastic resin has a higher melting point than the 2 nd thermoplastic resin when the 1 st thermoplastic resin, the 2 nd thermoplastic resin, and the 3 rd thermoplastic resin are different include: polypropylene-high density polyethylene-polyethylene terephthalate, polypropylene-linear low density polyethylene-high density polyethylene, polypropylene-high density polyethylene-ethylene-propylene copolymer, polyethylene terephthalate-high density polyethylene-polypropylene, polyethylene terephthalate-low density polyethylene-polypropylene, polyethylene terephthalate-linear low density polyethylene-polypropylene, polyethylene terephthalate-high density polyethylene-polybutylene terephthalate, polyethylene terephthalate-low density polyethylene-polybutylene terephthalate, polyethylene terephthalate-linear low density polyethylene-polybutylene terephthalate, polyethylene terephthalate, polyethylene terephthalate-linear low density polyethylene-polybutylene terephthalate, polyethylene terephthalate-polypropylene-polybutylene terephthalate, polybutylene terephthalate-high density polyethylene-ethylene-propylene copolymer, polybutylene terephthalate-low density polyethylene-ethylene-propylene copolymer, polybutylene terephthalate-linear low density polyethylene-ethylene-propylene copolymer, and the like, but the combination is not limited thereto.
A method of manufacturing the profiled-section fiber according to the present invention is explained below, but the method is not particularly limited thereto. An example of a method for producing a profiled-section fiber in which two polyolefin-based resins having different melting points are combined and the 1 st thermoplastic resin and the 3 rd thermoplastic resin are the same and have a melting point higher than that of the 2 nd thermoplastic resin by 15 ℃ or more is described.
The two polyolefin-based resins are made into fibers by using a melt spinning method and using a spinning nozzle having a special shape that can produce a profiled cross-section fiber. When spinning, the fibers are preferably spun at a spinning temperature of 180 to 350 ℃ and the withdrawal speed is preferably adjusted to about 40 to 1500 m/min. As the stretching, multistage stretching may be performed as necessary, and the stretching ratio may be adjusted to about 3 to 9 times. The obtained fiber bundle (tow) is then crimped as necessary and then cut into a predetermined length to produce short fibers. Further, the long fibers may be produced without cutting the fiber bundle.
The method of using the modified cross-section fiber according to the present invention is not particularly limited, but the modified cross-section fiber may be used as a modified fiber or a splittable fiber, and is preferably used as appropriate according to the field of use of the fiber.
In the present invention, when the modified cross-section fiber according to the present invention is used by being divided, in some cases, a component of the modified cross-section fiber from which a conjugate fiber is derived by being divided is referred to as a conjugate fiber structure, and a fiber obtained by being divided and derived from the structure is referred to as a conjugate fiber based on the conjugate fiber structure, and they can be suitably used. The conjugate fiber obtained by deriving from the structure is not particularly limited, but may be a structure in which the connected body and the conjugate fiber structure are completely separated, or a structure in which at least a part of the connected body is in a connected state. The composite fibers derived from the construct may be round in shape or non-round in shape.
The method for dividing the irregularly-shaped cross-section fibers is not particularly limited, and the dividing may be performed by a known method such as needle punching or high-pressure fluid jet treatment after the fibers are formed into a web or a nonwoven fabric, or may be performed by external stress such as stretching treatment in the fiber production step or fiber shrinkage in the heat treatment step.
The profiled-section fiber according to the present invention is not particularly limited. For example, if the fiber comprises two components of thermoplastic resin, the compounding ratio is preferably in the range of 10/90 to 90/10, and more preferably in the range of 30/70 to 70/30 in terms of a capacity ratio.
The fiber with the irregular cross section according to the invention has a filament fineness of preferably 0.6dtex to 10dtex before the fiber is divided, and more preferably 1.0dtex to 6.0 dtex. When the irregularly-shaped cross-section fiber is divided by a high-pressure fluid jet treatment or the like, the average single-fiber fineness of the single fibers in the ultrafine composite fiber divided from the divided connecting member is preferably 0.5dtex or less than 0.5dtex, and more preferably 0.3dtex or less than 0.3 dtex.
The profiled-section fibers according to the invention can be formed into fiber shaped bodies corresponding to the application, optionally after advanced processing.
Here, as the fiber molded body, any fiber molded body may be used as long as the body is in a cloth-like form, and the body is not particularly limited. Specific examples include woven fabrics, knitted fabrics and nonwoven fabrics. In addition, the fibers according to the invention can also be mixed or blended with any other fibers to produce fiber shaped articles. The fiber-formed product may be laminated with a web, a woven fabric, a knitted fabric, or a nonwoven fabric, which is uniformly formed by a carding process, an air-laid (air-laid) process, a papermaking process, or the like.
The fiber-formed body according to the present invention can be used by mixing or blending any other fiber in the profiled cross-section fiber as necessary, and specific examples of such any other fiber include: for example, synthetic fibers such as polyamide, polyester, polyolefin, and acrylic fibers, natural fibers such as cotton, wool, and hemp, regenerated fibers such as rayon, cupro rayon (cupra), and acetate, and semisynthetic fibers.
In such a step, after spinning the fibers, a surfactant may be deposited on the surfaces of the fibers for the purpose of antistatic the fibers, providing smoothness to the fiber formed body for improving processability, and the like. The kind and concentration of the surfactant are appropriately adjusted depending on the application. As the deposition method, a roll method, a dipping method, or the like can be used. The surfactant may also be deposited in any of the spinning step, the drawing step, and the crimping step. The surfactant may be deposited on the short fibers or long fibers in a step other than the spinning step, the drawing step, and the crimping step after the formation of the fiber-formed body.
The length of the profiled-section fiber according to the present invention is not particularly limited. In the preparation of a web using a carding machine, fibers having a length of 20mm to 76mm are generally used, whereas in the paper-making process or air-spinning process, fibers having a length of 2mm to 20mm are preferably used.
A specific example of a method for producing a nonwoven fabric is explained as one specific example of a method for producing a fiber formed body obtained from the irregularly-shaped cross-section fibers of the nonwoven fabric according to the present invention.
For example, a web having a desired weight per unit area is produced by using a carding process, an air-laid process, or a paper-making process, using short fibers produced by the process for producing the profiled cross-section fibers. The web produced by the method can be divided into fine fibers by a known method such as needle punching and high-pressure fluid jet treatment to obtain a fiber formed body. Further, the fiber molded body may be treated by a known processing method such as hot air or hot roll.
The basis weight of the fiber molded body according to the present invention is not particularly limited, but is preferably 10g/m2～200g/m2。
The product obtained using the shaped cross section fiber according to the present invention is excellent in gloss, concealing property, and moisture releasing property, and thus can be preferably used for absorbent articles such as diapers, sanitary napkins, and incontinence pads, for example. In addition, a nonwoven fabric manufactured using a conjugate fiber obtained by dividing the irregularly-shaped cross-section fiber according to the present invention can be used for absorbent articles such as diapers, sanitary napkins, and incontinence pads; medical and hygienic materials including medical gowns (gown), surgical gowns; interior materials, including siding, sliding door paper, and flooring materials; household-related materials including cover cloths (cover cloths), cleaning cloths, and bags for kitchen waste; toiletry (toiletry) articles including disposable toilets, toilet pads; pet products include pet sheets, pet diapers, and pet towel industrial materials, and are used in various fiber products such as wiping materials, battery separators, electric windshield wipers (electric window wipers), filter papers, cushioning materials, oil absorbing materials, absorbent materials for ink tanks (ink tank), general medical materials, bedding materials (bed fastening), and care products.
[ examples ]
The present invention is described in more detail by way of examples, but the present invention is not limited to these examples.
(thermoplastic resin)
The following resins were used as thermoplastic resins constituting the conjugate fibers.
1 st thermoplastic resin: propylene homopolymer (PP) having MFR (230 ℃ C., load: 21.18N) of 16g/10min and a melting point of 163 ℃ C
No. 2 thermoplastic resin: the density was 0.96g/cm3High-density polyethylene (PE for short) having MFR (190 ℃, load: 21.18N) of 16g/10min and a melting point of 130 DEG C
3 thermoplastic resin: the same propylene homopolymer as that of the No. 1 thermoplastic resin
Example 1
(production of fiber having irregular Cross section)
The profiled-section fiber shown in fig. 1(f) is spun using the 1 st thermoplastic resin (PP), the 2 nd thermoplastic resin (PE), and the 3 rd thermoplastic resin (PP) at a volume ratio 50/50 of the 1 st thermoplastic resin and the 3 rd thermoplastic resin to the 2 nd thermoplastic resin through a profiled-section fiber spinning nozzle. A profiled-section fiber having a fineness of 9.5dtex and having the cross-sectional shape shown in FIG. 2 was obtained.
At this time, as the surfactant, a fiber treatment agent containing an alkyl phosphate K salt as a main component was brought into contact with the spun fiber by using an oiling roller (oiling roller) to deposit the fiber treatment agent on the fiber.
The obtained undrawn fiber was drawn 6 times using a drawing machine with the drawing temperature set to 90 ℃, and the fiber was cut with a cutter to produce short fibers.
As shown in FIG. 3, the drawn fiber was divided to obtain a fine conjugate fiber having a fineness of 0.3 dtex. The fiber is divided by drawing, and therefore, it is found that the profiled-section fiber according to the present invention has a configuration in which the fiber can be easily divided.
While the present invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof. This application is based on Japanese patent application No. 2014-073057 (filed 3/31 2014), the contents of which are incorporated herein by reference.
Industrial applicability
The profiled fiber according to the present invention can be preferably used in the field of industrial materials such as battery separators, electric windshield wipers and filter papers, and in the field of sanitary materials such as diapers and sanitary napkins.
Claims (8)
1. A profiled cross-section fiber having:
a plurality of conjugate fiber structures comprising a 1 st thermoplastic resin and a 2 nd thermoplastic resin having a melting point or a softening point lower than that of the 1 st thermoplastic resin, and
a connected body containing a 3 rd thermoplastic resin having a melting point or a softening point higher than that of the 2 nd thermoplastic resin,
wherein at least two of the composite fiber structures are connected by the connecting member in an arbitrary fiber cross section,
the connected body further contains the 2 nd thermoplastic resin and has a structure in which the outer periphery of the 3 rd thermoplastic resin is covered with the 2 nd thermoplastic resin, wherein the 2 nd thermoplastic resin contained in the connected body and the 2 nd thermoplastic resin contained in the conjugate fiber structure are melted and merged together.
2. The modified cross-section fiber according to claim 1, wherein the cross-sectional shape of the conjugate fiber structure is circular or polygonal.
3. The modified cross-section fiber according to claim 1, which comprises 2 to 6 of the conjugate fiber structures.
4. The profiled-section fiber of claim 1, wherein the 1 st thermoplastic resin and the 3 rd thermoplastic resin are the same resin.
5. The modified cross-section fiber according to claim 1, wherein the 2 nd thermoplastic resin occupies a surface of the conjugate fiber structure except for a connecting portion with the connected body, wherein the connecting portion is a contact portion between the conjugate fiber structure and the connected body.
6. The profiled-section fiber according to claim 1, wherein the 3 rd thermoplastic resin occupies 20% or more of the cross section of the joined body.
7. A profiled-section fiber as set forth in claim 1 having the following configuration: 3 of the conjugate fiber structures arranged at equal intervals around the central 1 of the conjugate fiber structures are connected to the central 1 of the conjugate fiber structures by the connecting member.
8. The modified cross-section fiber according to claim 1, wherein in the relationship between 1 of the conjugate fiber structures and 1 of the connectors connected thereto, the length of a connection portion between the conjugate fiber structure and the connector connected thereto in the arbitrary fiber cross-section of the modified cross-section fiber is 65% or less than 65% of the outer peripheral length of the conjugate fiber structure, wherein the length of the connection portion is the length of a contact portion between the conjugate fiber structure and the connector in the arbitrary fiber cross-section.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-073057 | 2014-03-31 | ||
| JP2014073057A JP6324789B2 (en) | 2014-03-31 | 2014-03-31 | Irregular cross-section fiber |
| PCT/JP2015/060684 WO2015152419A1 (en) | 2014-03-31 | 2015-03-30 | Modified cross-section fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106133214A CN106133214A (en) | 2016-11-16 |
| CN106133214B true CN106133214B (en) | 2020-03-10 |
Family
ID=52988373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580017035.9A Active CN106133214B (en) | 2014-03-31 | 2015-03-30 | Profiled cross-section fiber |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20170022633A1 (en) |
| EP (1) | EP3126551B1 (en) |
| JP (1) | JP6324789B2 (en) |
| KR (1) | KR102254669B1 (en) |
| CN (1) | CN106133214B (en) |
| DK (1) | DK3126551T3 (en) |
| TW (1) | TWI664332B (en) |
| WO (1) | WO2015152419A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6324789B2 (en) * | 2014-03-31 | 2018-05-16 | Ｅｓファイバービジョンズ株式会社 | Irregular cross-section fiber |
| KR101894724B1 (en) * | 2016-06-08 | 2018-09-05 | 주식회사 휴비스 | Thermally Adhesive Shaped Conjugate yarn |
| EP3693745B1 (en) | 2019-02-07 | 2023-05-17 | Sartorius Biohit Liquid Handling Oy | Tip removal in automated pipette module |
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|---|---|---|---|---|
| GB1035657A (en) * | 1962-05-14 | 1966-07-13 | Courtaulds Ltd | Polyolefine tapes |
| US3725192A (en) * | 1967-02-25 | 1973-04-03 | Kanegafuchi Spinning Co Ltd | Composite filaments and spinneret and method for producing same |
| CN106133214A (en) * | 2014-03-31 | 2016-11-16 | Es飞博比琼斯株式会社 | Profiled fibre |
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| CH641844A5 (en) * | 1978-01-25 | 1984-03-15 | Akzo Nv | METHOD AND DEVICE FOR PRODUCING A MULTI-COMPONENT THREAD WITH A MATRIX COMPONENT AND AT LEAST ONE SEGMENT COMPONENT. |
| JPS5782526A (en) * | 1980-10-31 | 1982-05-24 | Toray Ind Inc | Splitting type antistatic conjugate fiber |
| JPS6021904A (en) * | 1983-07-13 | 1985-02-04 | Toray Ind Inc | Fiber generating extremely fine fibrils |
| JPS60185816A (en) * | 1984-03-02 | 1985-09-21 | Chisso Corp | Conjugated expanded monofilament and its preparation |
| JPH01250412A (en) * | 1988-03-31 | 1989-10-05 | Mitsubishi Rayon Co Ltd | Splittable multi fiber |
| JPH02175919A (en) * | 1988-12-27 | 1990-07-09 | Mitsubishi Rayon Co Ltd | Heat-fusible conjugate fiber |
| US5429856A (en) * | 1990-03-30 | 1995-07-04 | Minnesota Mining And Manufacturing Company | Composite materials and process |
| JP2977372B2 (en) * | 1992-06-05 | 1999-11-15 | 三菱重工業株式会社 | Casting method with vanishing model |
| WO1998009010A1 (en) * | 1996-08-27 | 1998-03-05 | Chisso Corporation | A non-woven fabric and an absorbent article using thereof |
| FR2790489B1 (en) * | 1999-03-01 | 2001-04-20 | Freudenberg Carl Fa | TABLECLOTH NOT WOVEN IN THERMOLIA FILAMENTS OR FIBERS |
| US20050039836A1 (en) * | 1999-09-03 | 2005-02-24 | Dugan Jeffrey S. | Multi-component fibers, fiber-containing materials made from multi-component fibers and methods of making the fiber-containing materials |
| US6444312B1 (en) * | 1999-12-08 | 2002-09-03 | Fiber Innovation Technology, Inc. | Splittable multicomponent fibers containing a polyacrylonitrile polymer component |
| JP4785659B2 (en) * | 2000-01-24 | 2011-10-05 | ダイワボウホールディングス株式会社 | Thermally divided composite fiber and fiber assembly |
| JP4608819B2 (en) * | 2000-06-26 | 2011-01-12 | チッソ株式会社 | Polyolefin-based split composite fiber and fiber molded body using the same |
| US20030203695A1 (en) * | 2002-04-30 | 2003-10-30 | Polanco Braulio Arturo | Splittable multicomponent fiber and fabrics therefrom |
| CN101939469B (en) * | 2007-08-02 | 2012-07-04 | 北卡罗来纳州立大学 | Mixed fibers and nonwoven fabrics made from the same |
| JP5535555B2 (en) * | 2009-08-27 | 2014-07-02 | Ｅｓファイバービジョンズ株式会社 | Thermal adhesive composite fiber and non-woven fabric using the same |
| US9855680B2 (en) * | 2013-06-11 | 2018-01-02 | Johns Manville | Fiber-reinforced composite articles and methods of making them |
-
2014
- 2014-03-31 JP JP2014073057A patent/JP6324789B2/en active Active
-
2015
- 2015-03-30 US US15/300,791 patent/US20170022633A1/en not_active Abandoned
- 2015-03-30 EP EP15717266.9A patent/EP3126551B1/en active Active
- 2015-03-30 KR KR1020167026664A patent/KR102254669B1/en active IP Right Grant
- 2015-03-30 WO PCT/JP2015/060684 patent/WO2015152419A1/en active Application Filing
- 2015-03-30 CN CN201580017035.9A patent/CN106133214B/en active Active
- 2015-03-30 DK DK15717266.9T patent/DK3126551T3/en active
- 2015-03-31 TW TW104110492A patent/TWI664332B/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1035657A (en) * | 1962-05-14 | 1966-07-13 | Courtaulds Ltd | Polyolefine tapes |
| US3725192A (en) * | 1967-02-25 | 1973-04-03 | Kanegafuchi Spinning Co Ltd | Composite filaments and spinneret and method for producing same |
| CN106133214A (en) * | 2014-03-31 | 2016-11-16 | Es飞博比琼斯株式会社 | Profiled fibre |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI664332B (en) | 2019-07-01 |
| DK3126551T3 (en) | 2018-12-03 |
| EP3126551B1 (en) | 2018-08-29 |
| EP3126551A1 (en) | 2017-02-08 |
| WO2015152419A1 (en) | 2015-10-08 |
| JP6324789B2 (en) | 2018-05-16 |
| JP2015193958A (en) | 2015-11-05 |
| KR20160137554A (en) | 2016-11-30 |
| TW201606152A (en) | 2016-02-16 |
| KR102254669B1 (en) | 2021-05-24 |
| US20170022633A1 (en) | 2017-01-26 |
| CN106133214A (en) | 2016-11-16 |
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Address after: Japan Osaka Osaka North Island in the three chome 3 No. 23 Applicant after: ES Fibervisions Co. Ltd Applicant after: Aisiwei Yi Shun Limited Hong Kong Company Applicant after: ES Fibervisions LP Applicant after: ES Fibervisions APS Address before: Japan Osaka Osaka North Island in the three chome 3 No. 23 Applicant before: ES Fibervisions Co. Ltd Applicant before: ES Fibervisions Hong Kong Ltd Applicant before: ES Fibervisions LP Applicant before: ES Fibervisions APS |
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