CN111206318A - Spiral high-performance synthetic fiber bundle - Google Patents
Spiral high-performance synthetic fiber bundle Download PDFInfo
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- CN111206318A CN111206318A CN202010189591.7A CN202010189591A CN111206318A CN 111206318 A CN111206318 A CN 111206318A CN 202010189591 A CN202010189591 A CN 202010189591A CN 111206318 A CN111206318 A CN 111206318A
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
- D02G3/045—Blended or other yarns or threads containing components made from different materials all components being made from artificial or synthetic material
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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
- 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
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- 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
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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
- D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/36—Cored or coated yarns or threads
Abstract
The invention relates to a spiral high-performance synthetic fiber bundle, which comprises a fiber inner core positioned in the center of the fiber bundle and peripheral fibers spirally wound on the fiber inner core, wherein the fiber inner core and the peripheral fibers are respectively modified synthetic fibers and unmodified synthetic fibers. The inner core responsible for intensity has been guaranteed to the spiral winding mode, can be more stable play the effect that promotes the bulk strength in inside, and at the peripheral surface winding synthetic fiber of axial overall length of fibre inner core, like high temperature resistant filler modified synthetic fiber, the polarity modified fiber of adjustment polarity, functional group graft modified synthetic fiber that can introduce functional group, the unmodified fiber of even reduce cost, the fibre that has different functions exposes on the surface in turn, like this high temperature resistance, polarity and non-polarity, the notion group of different functions, advantages such as high strength, all can exert, make fibrous reinforcing effect, dispersibility, all obtain maximize utilization with the performance such as the adhesive force of base member.
Description
Technical Field
The invention relates to a high-performance synthetic fiber bundle, in particular to a spiral fiber bundle used in the field of fiber reinforcement, wherein materials which can be reinforced by the fiber bundle include but are not limited to cement, concrete, plastics, resin, rubber and the like.
Background
The synthetic fiber is a fiber prepared from a synthetic resin by melt-drawing or melt-spinning. The fiber has high strength and can be used for reinforcing materials such as cement, concrete, plastics, resin, rubber and the like. Compared with glass, the synthetic fiber is alkali-resistant, corrosion-resistant, safe and harmless to human body. Compared with steel fiber, the synthetic fiber has the advantages of no human pricking, light weight, no rustiness, corrosion resistance and lower cost.
However, synthetic fibers also have their own drawbacks, which greatly limit the applications of the fibers. First, synthetic fibers have poor heat resistance, and in materials molded at high temperatures of plastics or rubbers, if the heat resistance temperature of the synthetic fibers is lower than the molding temperature of the plastics or rubbers, the synthetic fibers lose strength due to the high temperature during molding. Second, the synthetic fibers have poor dispersibility. The dispersibility of the synthetic fibers in the matrix depends on the properties of the matrix (cement, concrete, plastics, resins, rubber, etc.), the polarity of the fibers needs to be matched with the polarity of the matrix, and too much or too little difference in polarity, too much or too little polarity, can cause difficulty in dispersion. Third, the strength of synthetic fibers is generally not high, and is generally lower than that of glass fibers or steel fibers, which results in the reinforcing effect of synthetic fibers being inferior to that of glass fibers and steel fibers. Fourth, the adhesion of synthetic fibers to the matrix is generally poor. For example, non-polar synthetic fibres with a polar rubber matrix, non-functional synthetic fibres with SiO-containing2The cement and concrete, polar fibers and non-polar plastic matrices, etc. have poor adhesion, which also results in poor fiber reinforcement.
Therefore, in the prior art, a synthetic fiber is difficult to find, and the advantages of high temperature resistance, high dispersibility, high strength, high cohesiveness, adjustable polarity, adjustable non-polarity, adjustable functional group introduction and the like are integrated.
Disclosure of Invention
In order to solve such a drawback, the present invention provides a spiral-type high-performance synthetic fiber bundle, which allows synthetic fibers to integrate as many advantages as possible, while allowing the synthetic fibers to be changed and adjusted according to the properties of the matrix to be reinforced.
The technical scheme of the invention is as follows:
a spiral high-performance synthetic fiber bundle is characterized by comprising a fiber inner core positioned in the center of the fiber bundle and peripheral fibers spirally wound on the fiber inner core, wherein one of the fiber inner core and the peripheral fibers is a modified synthetic fiber, and the other fiber is an unmodified synthetic fiber.
Preferably, the fiber core is an unmodified synthetic fiber, and different modified synthetic fibers are spirally wound on the fiber core.
Preferably said peripheral fibres are co-or counter-helically wound around said fibrous inner core.
The preferable synthetic resin raw material of the synthetic fiber comprises one or more of polypropylene, polyethylene, polyacrylonitrile fiber, polyester, ultra-high molecular weight polyethylene, polyamide, polyformaldehyde, polyvinyl alcohol, polyvinyl formal, polyethylene terephthalate, polybenzimidazole, polytetrafluoroethylene, poly-p-phenylene terephthalamide and polyimide.
Preferably, the modified synthetic fiber comprises polar modified synthetic fiber, functional group grafted modified synthetic fiber, filler modified synthetic fiber and/or master batch modified synthetic fiber.
Further preferably, the modifier of the modified synthetic fiber is silane coupling agent Si-69, KH570, KH560, KH550, KH151, silica gel anti-blocking agent, titanate coupling agent, aluminate coupling agent, ethyl orthosilicate, nucleating agent masterbatch, plasticizing masterbatch, high temperature resistant masterbatch, antiseptic masterbatch, defoaming masterbatch, chlorinated polypropylene, maleic anhydride grafted polyethylene, maleic acid diallyl ester, pentaerythritol tetra-methyl acrylate, polyethylene glycol, polybutylene adipate, polycaprolactone, dipropylene glycol butyl ether, divinylbenzene, dicumyl peroxide, silicone oil, surfactant, ethanol, xylene, inorganic ultrafine particles, carbon black, calcium carbonate, TiO, and the like2Talcum powder, kaolin, silicon dioxide, silica, wollastonite, mica, barium sulfate, glass microsphere and glass fiberOne or more of vitamin, diatomite, montmorillonite, hydrotalcite, wood powder and starch.
Preferably, the fiber inner core is unmodified synthetic fiber, and the peripheral fiber is polar modified synthetic fiber and functional group grafted modified synthetic fiber.
The preparation method of the fiber bundle is characterized by comprising the following steps:
preparing modified synthetic fibers, mixing a modifier and synthetic resin according to a proportion, and then carrying out melt drawing or melt spinning to prepare the modified synthetic fibers; or, the synthetic resin is firstly made into fiber by a melt wire drawing or melt spinning method, and then the fiber is modified by a modifier to be made into modified synthetic fiber; or, the modifier and the synthetic resin are mixed according to a certain proportion, and then the mixture is subjected to melt drawing or melt spinning, and then the fiber is modified by the modifier again to prepare modified synthetic fiber;
preparing unmodified synthetic fibers by melt spinning or melt drawing of synthetic resin;
and spirally winding the peripheral fibers on the fiber inner core in the same direction or in the reverse direction.
The invention has the following technical effects:
the spiral high-performance synthetic fiber bundle provided by the invention is formed by pioneering the modified or unmodified synthetic fiber spirally wound on the unmodified or modified synthetic fiber inner core, and has the following effects:
the unmodified synthetic fibers may retain their original properties including strength, tenacity, polarity, functional groups, and the like. These properties are not changed by the modifier, the strength is not reduced by the modifier, the processability is not deteriorated by the modifier, and the cost of the fiber is reduced by reducing the use of the modifier.
Modified fibers, generally including but not limited to the following four types:
(1) the polar modified synthetic fiber is prepared by adjusting the polarity and the non-polarity of the fiber through a modifier, so that the polarity of the fiber is matched with that of a reinforced matrix, and the dispersibility of the fiber is improved. The modifier is one or a mixture of more than one of maleic anhydride grafted polypropylene, maleic anhydride grafted polyethylene, maleic acid diallyl ester, pentaerythritol tetra-methyl acrylate, polyethylene glycol, polybutylene adipate, polycaprolactone, dipropylene glycol butyl ether, divinylbenzene, dicumyl peroxide, silicone oil, a surfactant, ethanol and xylene.
(2) The functional group graft modifies the synthetic fiber, which introduces proper functional groups such as Si, Si-O, -OH, -COOH, etc. into the fiber through a modifier, so that the fiber and the matrix generate stronger bonding force and other special functions. The modifier is one or more of silane coupling agent Si-69, KH570, KH560, KH550, KH151, silica gel antiblocking agent, titanate coupling agent, aluminate coupling agent, ethyl orthosilicate and chlorinated polypropylene.
(3) The filler modified synthetic fiber is characterized in that the fiber is reinforced by the filler, so that the rigidity, the elastic modulus, the tensile strength and the like of the fiber are improved, and the high-temperature resistance of the fiber can be improved by partial inorganic filler. The modifier is one or more of inorganic ultrafine particles, carbon black, calcium carbonate, TiO2, talcum powder, kaolin, silicon dioxide, silica, wollastonite, mica, barium sulfate, glass beads, glass fiber, diatomite, montmorillonite, hydrotalcite, wood powder and starch.
(4) The master batch is added to modify the synthetic fiber, so that the fiber has corresponding performance and function during melt drawing or melt spinning, and two or more than two synthetic resins used during fiber preparation can generate better compatibility. The modifier is one or more of nucleating agent master batch, color master batch, plasticizing master batch, high temperature resistant master batch, anticorrosion master batch and defoaming master batch.
The fiber bundle of the present invention combines well a plurality of different modified and unmodified fibers. The modifying agents with different characteristics can modify the fibers separately, so that the modification efficiency is greatly improved, the modifying agents are effectively saved, the modifying agents can independently play respective roles without mutual interference, and for example, the whole fiber bundle can simultaneously have the properties of hydrophilicity, silicon-containing functional groups, high strength, high temperature resistance, low cost and the like. If this travel of these different functions is mixed together and added to one fiber at the same time, many problems are caused, such as the modifiers reacting with each other, the modifiers being too much to be uniformly dispersed, the functional groups covering each other causing modification efficiency to be poor, the modifiers being wasted, the modifiers being too much causing fiber to be not shaped, and the like.
The inner core responsible for the intensity is guaranteed by the spiral winding mode, such as unmodified synthetic fiber, filler modified synthetic fiber and filler modified synthetic fiber, the inner part can play a role of improving the overall intensity more stably, the synthetic fiber is wound on the surface of the axial overall length at the periphery of the fiber inner core, such as high-temperature resistant filler modified synthetic fiber, polarity modified fiber for adjusting the polarity, functional group graft modified synthetic fiber capable of introducing functional groups, and even unmodified fiber for reducing the cost, the fiber with different functions is alternately exposed on the surface, so that the advantages of high temperature resistance, polarity and non-polarity, concept groups with different functions, high intensity and the like can be exerted, and the properties of the fiber, such as the reinforcing effect, the dispersity, the adhesive force with a matrix and the like, can be utilized to the maximum extent.
The spiral winding approach has two distinct advantages. Firstly, the inner core fiber can be well protected, and particularly in a high-temperature forming environment, the peripheral high-temperature resistant fiber protects the inner core, so that the high-temperature resistance of the inner core is improved. In some special enhanced environments, such as where the matrix has a degrading effect on the inner core, the surrounding fibers may also block the matrix from corroding the inner core. Second, the degree of sparseness and denseness of the wrapping fibers can be adjusted by the peripheral fibers according to the needs of the matrix. For example, in order to improve the dispersion of the fibers, it is necessary to match the polarity of the fibers with the polarity of the matrix, and in the case where the amount of the polar or nonpolar group is constant, the polarity of the fibers can be adjusted by adjusting the density of the polarity-modified synthetic fibers.
In summary, the fiber bundle not only realizes the idea of firmly combining the different fibers, but also improves the overall strength of a single fiber, and the fiber bundle has various performance advantages, more importantly, the fiber bundle can better exert the modification effect on the strength, the high temperature resistance, the dispersibility and the interfacial adhesion, so that the high temperature resistance, the dispersibility and the interfacial adhesion of the fiber are respectively and obviously improved under the condition of the same fiber strength, or the fiber bundle can simultaneously keep higher high temperature resistance, dispersibility and interfacial adhesion under the condition of keeping higher fiber strength, and therefore, the reinforcing effect of the fiber bundle in various matrixes is also greatly improved.
Preferably, an unmodified synthetic fiber is taken as a fiber inner core, a polar modified synthetic fiber and a functional group grafting modified synthetic fiber are wound on the fiber inner core, two modified synthetic fibers are spirally wound on the unmodified fiber inner core to form a fiber bundle, three different performances are better exerted with as few fibers as possible, the fiber bundle can integrally keep the high strength of the fiber, is easy to disperse, and can be better combined with a matrix, so that a better reinforcing effect is achieved.
Preferably, the modified synthetic fibers are spirally wound on the fiber inner core in the same direction or in reverse direction, and the grains in the same direction are uniformly arranged, so that the contact surface between the whole strand of fibers and the matrix is large, but the friction force between the fibers is small, namely the bonding force between the fibers is small, but the bonding force between the fibers and the matrix is large. The reverse grain arrangement, the large tracts of land of inner core exposes, can let whole strand of fibre and the frictional force of base member on the small side, but the frictional force between fibre and the fibre is great, especially peripheral fibre relatively poor node department. The choice of co-or counter-direction will need to be selected according to the particular fiber, matrix and properties desired.
Drawings
FIG. 1 is a schematic view of an embodiment of a high performance synthetic fiber bundle of the present invention wound in a co-rotating spiral pattern;
fig. 2 is a schematic view of an embodiment of the reverse spiral winding type high performance synthetic fiber bundle of the present invention.
Reference numerals: 1-fiber bundle, 11-unmodified synthetic fiber, 12-polar modified synthetic fiber, 13-functional group graft modified synthetic fiber, 14-master batch modified synthetic fiber and 15-filler modified synthetic fiber.
Detailed Description
For a better understanding of the invention, the invention is further explained below with reference to the figures 1-2 and the examples.
Example 1
The spiral high-performance synthetic fiber bundle of the present embodiment is a co-directional spiral winding manner, as shown in fig. 1, includes a fiber core, on which modified synthetic fibers are co-directionally spirally wound to form a fiber bundle 1, the fiber core is an unmodified high-strength synthetic fiber 11, and the modified synthetic fibers are a polar modified synthetic fiber 12 and a functional group graft modified synthetic fiber 13.
The manufacturing method of the spiral high-performance synthetic fiber bundle comprises the following steps:
preparation of high-strength unmodified synthetic fiber 11: adding the polypropylene particles into a single-screw extruder, and carrying out melt drawing to obtain the high-strength polypropylene fiber with the tensile strength of 600 MPa.
Preparation of the polar modified synthetic fiber 12: polypropylene particles and a polar modifier, maleic anhydride grafted polypropylene, were mixed in a ratio of 7: 3, adding the mixture into a single-screw extruder, and performing melt drawing to obtain the modified polypropylene fiber. Because the polar fibers can interact with the admixture in the concrete, the fibers can be further dispersed along with the dispersion of the admixture, and the dispersibility of the fiber is improved by 80 percent.
Preparation of functional group graft-modified synthetic fiber 13: mixing polypropylene particles and polyethylene particles according to the weight ratio of 5: 1 is added into a single-screw extruder, melt extrusion is carried out at the temperature of 200-250 ℃, after cold water cooling and melt wire drawing, the fiber is modified by silane coupling agent Si69, the bonding force of the functional group graft modified polypropylene fiber modified by the coupling agent and the concrete is improved by 100 percent compared with that of the unmodified fiber.
Taking high-strength unmodified polypropylene fiber as a fiber inner core, and winding the polar modified polypropylene fiber and the polypropylene fiber grafted and modified by functional groups around the unmodified polypropylene fiber in a co-rotating spiral winding manner to formA fiber bundle 1. Because the fiber bundle consists of the high-strength polypropylene fiber, the high-dispersity maleic anhydride modified polypropylene fiber and the silane coupling agent modified polypropylene fiber with high binding force with concrete, the high-dosage fiber can be used for reinforcing the concrete, and the reinforcing effect of the fiber on the concrete is greatly improved. 18kg/m3According to ASTM C1550, the fibre bundle reinforced concrete patty has an energy absorption of 1200J at a deflection of 40mm, as compared with 18kg/m alone3The polypropylene fiber is improved by 120 percent.
Example 2
The spiral high-performance synthetic fiber bundle of the embodiment is in a same-direction spiral winding mode and comprises a fiber inner core, wherein the fiber inner core is a filler modified synthetic fiber, and an unmodified synthetic fiber is spirally wound on the filler modified synthetic fiber in the same direction to form the fiber bundle.
The manufacturing method of the spiral high-performance synthetic fiber bundle comprises the following steps:
preparation of filler modified synthetic fiber: silica and polypropylene granules were mixed according to 3: 7, and performing melt drawing to obtain the filler modified polypropylene fiber. The rigidity of the fiber is improved by 250% and the high temperature resistance is improved by 90% due to the enhancement of the silicon dioxide. Since the reinforced rubber matrix is formed at a temperature of about 220 ℃, the core fiber needs to have a certain high temperature resistance. Meanwhile, the filler greatly improves the rigidity of the synthetic fiber, and as a main stress part, the reinforcing effect of the fiber is obviously improved.
Preparation of unmodified synthetic fibers: adding the nylon 6 particles into a single-screw extruder, carrying out melt spinning, and then respectively carrying out high-temperature traction at 80 ℃ to prepare the high-strength polyamide fiber with the tensile strength of 1100 MPa. The high temperature resistance of the nylon fiber is 250 ℃, and the vulcanization temperature of the natural rubber is 220 ℃, so the nylon fiber can perform good high temperature resistance protection on the inner core fiber.
The high-rigidity silicon dioxide reinforced polypropylene fiber is used as an inner core, and the high-temperature resistant nylon fiber is wound around the polypropylene fiber in a co-rotating spiral winding mode to form a fiber bundle. And (3) uniformly mixing the fiber bundles and the natural rubber, and fully vulcanizing to obtain the fiber reinforced rubber material. The tensile strength of the fiber bundle reinforced natural rubber is 300MPa, and is improved by 300% compared with the traditional synthetic fiber reinforced natural rubber.
Example 3
The spiral high-performance synthetic fiber bundle of the present embodiment is a reverse spiral winding manner, and as shown in fig. 2, includes a fiber core, the fiber core is an unmodified high-strength synthetic fiber 11, and a master batch modified synthetic fiber 14 and a filler modified synthetic fiber 15 are reversely spirally wound on the high-strength synthetic fiber 11 to form a fiber bundle 1.
The manufacturing method of the spiral high-performance synthetic fiber bundle comprises the following steps:
preparation of high-strength unmodified synthetic fiber 11: adding the nylon 6 particles into a single-screw extruder, carrying out melt spinning, and then respectively carrying out high-temperature traction at 80 ℃ to prepare the high-strength polyamide fiber with the tensile strength of 1100 MPa.
Preparation of masterbatch modified synthetic fiber 14: mixing nylon 6, polypropylene and plasticizing master batch according to the weight ratio of 7: 2: 1 to obtain the high-performance modified synthetic fiber. The fiber reinforced polypropylene plastic greatly improves the adhesion and dispersibility between the fiber and the matrix. Because the polypropylene and the plasticizing master batch are introduced into the fiber on the basis of the nylon 6, the polypropylene chain segment and the plasticizing master batch on the fiber can generate good adhesive force and compatibility with a polypropylene matrix.
Preparation of the filler-modified synthetic fiber 15: glass fibers and polypropylene particles were mixed according to 3: 7, and performing melt drawing to obtain the filler modified polypropylene fiber. The fiber has the advantages that the rigidity is improved by 200% and the high temperature resistance is improved by 80% due to the reinforcement of the glass fiber. Since the reinforced polypropylene matrix is formed at a temperature of about 200 degrees celsius, the fibers need to have high temperature resistance. The modified polypropylene fiber and the reinforced matrix are similar resin, so the dispersibility is obviously improved.
Preparation of fiber bundle 1: one of the three fibers is taken out and is wound and woven into a fiber bundle according to a reverse spiral manner. The tensile strength of the polypropylene reinforced by the fiber bundles with the mass fraction of 30 percent is 550MPa, which is improved by 170 percent compared with the polypropylene reinforced by nylon 6 fiber alone.
It is pointed out here that the above description is helpful for the person skilled in the art to understand the content of the invention, but does not limit the scope of protection of the invention. Any such equivalents, modifications and/or omissions as may be made without departing from the spirit and scope of the invention may be resorted to.
Claims (8)
1. A spiral high-performance synthetic fiber bundle is characterized by comprising a fiber inner core positioned in the center of the fiber bundle and at least one strand of peripheral fibers spirally wound on the fiber inner core, wherein one of the fiber inner core and the peripheral fibers is a modified synthetic fiber, and the other fiber is an unmodified synthetic fiber.
2. The fiber bundle of claim 1, wherein the fiber core is an unmodified synthetic fiber, and different modified synthetic fibers are helically wound around the fiber core.
3. The fiber bundle of claim 1, wherein the peripheral fibers are co-or counter-helically wound around the fiber core.
4. The fiber bundle of claim 1, wherein the synthetic resin raw material of the synthetic fiber comprises one or more of polypropylene, polyethylene, polyacrylonitrile fiber, polyester, ultra-high molecular weight polyethylene, polyamide, polyoxymethylene, polyvinyl alcohol, polyvinyl formal, polyethylene terephthalate, polybenzimidazole, polytetrafluoroethylene, poly (paraphenylene terephthalamide), and polyimide.
5. The fiber strand according to claim 1, characterized in that the modified synthetic fibers comprise polar modified synthetic fibers, functional group graft modified synthetic fibers, filler modified synthetic fibers and/or masterbatch modified synthetic fibers.
6. The fiber bundle of claim 5, wherein the modifier for modifying the synthetic fiber is silane coupling agent Si-69, KH570, KH560, KH550, KH151, silica gel antiblocking agent, titanate coupling agent, aluminate coupling agent, ethyl orthosilicate, nucleating agent masterbatch, color masterbatch, plasticizing masterbatch, high temperature resistant masterbatch, anti-corrosive masterbatch, defoaming masterbatch, chlorinated polypropylene, maleic anhydride grafted polyethylene, diallyl maleate, pentaerythritol tetramethacrylate, polyethylene glycol, polybutylene adipate, polycaprolactone, dipropylene glycol butyl ether, divinylbenzene, dicumyl peroxide, silicone oil, surfactant, ethanol, xylene, inorganic ultrafine particles, carbon black, calcium carbonate, TiO ultrafine particles2One or more of talcum powder, kaolin, silicon dioxide, silica, wollastonite, mica, barium sulfate, glass beads, glass fiber, diatomite, montmorillonite, hydrotalcite, wood powder and starch.
7. The fiber bundle of claim 1, wherein the inner fiber core is an unmodified synthetic fiber and the peripheral fiber is a polar modified synthetic fiber and a functional group graft modified synthetic fiber.
8. A method for producing a fiber strand according to any of claims 1 to 7, characterized by comprising the steps of:
preparing modified synthetic fibers, mixing a modifier and synthetic resin according to a proportion, and then carrying out melt drawing or melt spinning to prepare the modified synthetic fibers; or, the synthetic resin is firstly made into fiber by a melt wire drawing or melt spinning method, and then the fiber is modified by a modifier to be made into modified synthetic fiber; or, the modifier and the synthetic resin are mixed according to a certain proportion, and then the mixture is subjected to melt drawing or melt spinning, and then the fiber is modified by the modifier again to prepare modified synthetic fiber;
preparing unmodified synthetic fibers by melt spinning or melt drawing of synthetic resin;
and spirally winding the peripheral fibers on the fiber inner core in the same direction or in the reverse direction.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112981589A (en) * | 2021-02-02 | 2021-06-18 | 福建永荣锦江股份有限公司 | Chinlon 6 filament and preparation method thereof |
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