CN112779623B - Composition for cutting-resistant fiber, application and preparation method - Google Patents
Composition for cutting-resistant fiber, application and preparation method Download PDFInfo
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- CN112779623B CN112779623B CN202010982930.7A CN202010982930A CN112779623B CN 112779623 B CN112779623 B CN 112779623B CN 202010982930 A CN202010982930 A CN 202010982930A CN 112779623 B CN112779623 B CN 112779623B
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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
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
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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
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/90—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyamides
-
- 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
- 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
Abstract
The present invention provides a composition for making cut resistant fibers comprising: terylene and/or chinlon, silicon dioxide, silicon carbide, elastomer and silane coupling agent; the weight ratio of silicon dioxide to silicon carbide is 4-8. The invention also provides a method for preparing the cutting-resistant fiber from the composition, which comprises the following steps: a. mixing: mixing terylene and/or chinlon, silicon dioxide, silicon carbide, elastomer and silane coupling agent uniformly; the weight ratio of the silicon dioxide to the silicon carbide is 4-8; b. preparing a molten fluid; c. spinning; d. and (5) post-treatment. The invention also provides the application of the cut-resistant fiber. According to the composition provided by the invention, the components react with each other in the process of preparing the cut-resistant fiber, so that a mixture containing the terylene and/or the chinlon, the silicon dioxide, the silicon carbide, the elastomer and the silane coupling agent can be smoothly spun into the silk which has certain toughness and is not easy to break, and the technical problem that the terylene and/or the chinlon, the silicon dioxide and the silicon carbide cannot be spun is solved.
Description
Technical Field
The invention relates to the field of new materials, in particular to high-performance fibers and composite materials of advanced structural materials, more particularly to the field of cut-resistant fibers, and particularly relates to a composition for the cut-resistant fibers, application of the cut-resistant fibers, and a preparation method of the cut-resistant fibers.
Background
Currently, in the general field of cut-resistant materials, the cut-resistant material is generally high-density polyethylene, or a material formed by adding a hard material to high-density polyethylene glass fiber, and the like. In order to provide a finished product with both softness and cut resistance, these cut-resistant materials are generally woven into a fabric in a certain proportion for use in the personal protection field.
However, such a material based on high density polyethylene has poor hand feeling and great processing difficulty, and particularly, it is very expensive.
SUMMARY OF THE PATENT FOR INVENTION
In order to overcome the defect that the cutting-resistant material is high in cost, the invention provides the composition for preparing the cutting-resistant material, and the cutting-resistant fiber prepared from the composition is low in cost and good in fiber hand feeling.
The invention provides a composition for preparing cut-resistant fibers, which is characterized by comprising the following components: terylene and/or chinlon, silicon dioxide, silicon carbide, elastomer and silane coupling agent.
The invention also provides a cutting-resistant fiber which is characterized by being prepared from the composition provided by the invention.
The invention also provides a method for preparing the cut-resistant fiber, which is characterized by comprising the following steps:
a. mixing: mixing terylene and/or chinlon, silicon dioxide, silicon carbide, elastomer and silane coupling agent uniformly;
b. preparing a molten fluid;
c. spinning;
d. and (5) post-treatment.
The invention also provides application of the cutting-resistant fiber in preparation of a cutting-resistant material.
According to the composition for preparing the cut-resistant material, provided by the invention, the components react with each other in the process of preparing the cut-resistant fiber, so that a mixture containing the terylene and/or the chinlon, the silicon dioxide, the silicon carbide, the elastomer and the silane coupling agent can be smoothly spun into the silk which has certain toughness and is not easy to break, and the technical problem that the terylene and/or the chinlon, the silicon dioxide and the silicon carbide cannot be spun is solved.
The invention also provides application of the cut-resistant fiber in preparing a cut-resistant material, and the cut-resistant material can be used for protective clothing: such as helmet liners, aprons, gloves, knee pads, armrests, shoe uppers or cords.
The cutting resistance grade of the cutting-resistant fiber provided by the invention is EN388 cutting B, TDM cutting A2, and is equivalent to the cutting resistance grade of the high-density polyethylene fiber, and the hand feeling of the cutting-resistant fiber provided by the invention is better than that of the high-density polyethylene fiber, and the wearing comfort is good. Therefore, the cutting-resistant fiber provided by the invention can completely replace a high-density polyethylene fiber to be used in the corresponding protection application field, and has wide application prospect.
The preparation method of the cut-resistant fiber has simple process and very low cost, and the preparation cost of the cut-resistant fiber is only about one third of the preparation cost of the high-density polyethylene fiber (about 60 yuan/kg of high-density polyethylene fiber and about 20 yuan/kg of the cut-resistant fiber), so the cut-resistant fiber has great commercial value.
Detailed Description
The invention provides a composition for preparing cut-resistant fibers, which is characterized by comprising the following components: terylene and/or chinlon, silicon dioxide, silicon carbide, elastomer and silane coupling agent; wherein the weight ratio of silicon dioxide to the silicon carbide may be 4 to 8.
In the application, the reaction of the elastomer and the silane coupling agent with terylene and/or chinlon, silicon dioxide and silicon carbide is beneficial to improving the toughness of the final mixture, thereby being beneficial to spinning, and the produced yarn is not easy to break.
The silane coupling agent can be aminosilane, epoxy silane, sulfenyl silane, methacryloxy silane, vinyl silane, ureido silane and isocyanate silane; specific examples thereof may be: dodecyl trichlorosilane, dodecyl trimethoxysilane, dodecyl triethoxysilane, tetramethyl tetravinylcyclotetrasiloxane, octamethylcyclotetrasiloxane, aminopropyltriethoxysilane, aminopropyltrimethoxysilane, aminopropyl-aminoethyltrimethoxysilane, aminopropyl-aminoethyltriethoxysilane, or aminoethylaminoethylaminopropyltrimethoxysilane; the organic amine is preferably decylamine, dodecylamine, hexadecylamine, octadecylamine, 1, 10-decylamine or distearylamine.
In a preferred embodiment, the weight ratio of silica to the silicon carbide may be in the range of 5 to 7 in order to further optimize the cut resistance and filament formation properties.
In another preferred embodiment, 70-80 parts by weight of the terylene and/or the chinlon, 15-25 parts by weight of the silicon dioxide, 1-5 parts by weight of the silicon carbide, 3-8 parts by weight of the elastomer and 0.05-0.5 part by weight of the silane coupling agent are used.
In order to further improve the cut resistance and improve the antistatic property, in another preferred embodiment, the composition further comprises graphene; preferably, the content of the graphene is 0.5-5 parts by weight. The graphene may be modified or unmodified.
In another preferred embodiment, the composition further comprises an antioxidant for extended service life. The antioxidant can be one or more of DSPT antioxidant, antioxidant 1010, antioxidant 1076, antioxidant CA, antioxidant 164, antioxidant DNP, antioxidant DLTP, and antioxidant TNP.
In another preferred embodiment, the antioxidant is present in an amount of 0.1 to 1 part by weight.
In order to further promote the uniform mixing of the ingredients, in another preferred embodiment, the composition further comprises a lubricant. The lubricant may be paraffin oil, mineral oil, white oil, etc.
In another preferred embodiment, the lubricant is present in an amount of 0.1 to 1 part by weight.
For improved comfort, filamentation and cut resistance, in another preferred embodiment, the silica has a particle size of 0.05 to 10 microns, preferably 0.1 to 5 microns, more preferably 0.5 to 3 microns; the particle size of the silicon carbide is 0.05 to 10 microns, preferably 0.1 to 5 microns, more preferably 0.5 to 3 microns.
In another preferred embodiment, for better compatibility, the elastomer is a nylon elastomer and/or a polyester elastomer.
The invention also provides a cutting-resistant fiber which is characterized by being prepared from the composition provided by the invention.
In another preferred embodiment, the cut resistant fiber has a sheath-core structure, the core being prepared from the composition provided by the present invention. The cut-resistant fiber of the sheath-core structure has better hand feeling and cut resistance.
In another preferred embodiment, the skin is made of an elastomer; preferably, the elastomer is a nylon elastomer and/or a polyester elastomer.
In another preferred embodiment, the skin has a thickness of 2.5 to 5 microns.
In another preferred embodiment, the core has a diameter of 8 to 10 microns.
The invention also provides a method for preparing the cut-resistant fiber, which is characterized by comprising the following steps:
a. mixing: mixing terylene and/or chinlon, silicon dioxide, silicon carbide, elastomer and silane coupling agent uniformly;
the ratio of silicon dioxide to the silicon carbide is 4-8;
b. preparing a molten fluid;
c. spinning;
d. and (5) post-treatment.
The above mixing is usually carried out by a high-speed mixer.
If the mixture has a high moisture content, it is preferable to dry the mixture, for example, by discharging the mixed material through a discharge port, conveying the discharged material to an infrared drying tunnel through a conveyor belt for drying, controlling the temperature at 80 to 100 ℃ and continuously feeding the dried material to the feed port of the extruder. The material is heated from the feeding section to the melting section and finally to the homogenizing section by the rotating screw, so that the temperature of the material is gradually increased, the form begins to be changed from a solid state to a glass state, and finally uniform molten fluid is formed.
The molten fluid is quantitatively pressed into the spinning assembly through a metering pump and then is sprayed out through a spinning plate. The spinning nozzle, the distribution plate and the filter material form a spinning assembly. The spinning melt enters from the central feeding hole, is filtered by the filter screen and then enters the distribution plate, and the distribution plate uniformly disperses the fluid into small holes of the flocculus and uniformly presses the fluid to the spinneret plate through the small holes.
The post-treatment generally comprises blowing the yarn while stretching and twisting it, setting, balancing, dyeing and winding, packaging, inspecting, etc.
In another preferred embodiment, in step b, the mixture is kept under stirring at 270 ℃ and 330 ℃; preferably, stirring is carried out at 280-300 ℃. When the temperature is lower than 270 ℃, the molten state of the resulting mixture may be less than ideal, and the effect of forming filaments is slightly poor; when the temperature is above 330 ℃, the components are at risk of decomposition.
In another preferred embodiment, in step b, the mixture is maintained at 270 ℃ and 330 ℃ for 5 to 15 minutes. Too short a time tends to result in uneven mixing, and too long a time runs the risk of causing decomposition of the components.
In another preferred embodiment, the ratio of silica to the silicon carbide is from 5 to 7, which contributes to improved spinnability and increased cut resistance.
In another preferred embodiment, 70-80 parts by weight of the terylene and/or the chinlon, 15-25 parts by weight of the silicon dioxide, 1-5 parts by weight of the silicon carbide, 3-8 parts by weight of the elastomer and 0.05-0.5 part by weight of the silane coupling agent are used.
In another preferred embodiment, in order to improve comfort, filamentation and cut resistance, graphene is further added in the step a, and the content of the graphene is 0.5-5 parts by weight.
In another preferred embodiment, an antioxidant and/or a lubricant is further added in the step a, wherein the content of the antioxidant is 0.1-1 part by weight, and the content of the lubricant is 0.1-1 part by weight.
In another preferred embodiment, the silica has a particle size of 0.05 to 10 microns, preferably 0.1 to 5 microns, more preferably 0.5 to 3 microns, for improved comfort, filamentation and cut resistance; the particle size of the silicon carbide is 0.05 to 10 microns, preferably 0.1 to 5 microns, more preferably 0.5 to 3 microns.
In another preferred embodiment, the elastomer is a nylon elastomer and/or a polyester elastomer.
In another preferred embodiment, in step c, a spinning apparatus is used which can eject a sheath-core structure, wherein the core is formed from the molten fluid formed in step b and the sheath is formed from an elastomer.
The invention also provides application of the cutting-resistant fiber in preparation of a cutting-resistant material.
In another preferred embodiment, the cut resistant material may be used in protective apparel: such as helmet liners, aprons, gloves, knee pads, armrests, shoe uppers or cords.
Example 1
(a) Adding 70 parts by weight of terylene, 20 parts by weight of silicon dioxide (granularity of 0.1 micron), 3 parts by weight of silicon carbide (granularity of 0.5 micron), 5 parts by weight of nylon elastomer Pebax and 0.2 part by weight of tetramethyl-tetraethylene cyclotetrasiloxane into a high-speed mixer for mixing; and controlling the water content of the mixture to less than 0.2% by weight by drying.
(b) Feeding the mixture obtained in step (a) into an extruder at a temperature of between 280 ℃ and 300 ℃ to form a molten fluid in the mixture, wherein the screw speed is 15 rpm and the temperature is kept for about 10 minutes.
(c) Extruding the melt stream obtained in step (b) through a metering pump into a spin pack and ejecting the melt stream through a spinneret.
(d) Cooling the filaments obtained in step (c) by blowing air, simultaneously stretching and twisting, and sizing to obtain filaments with a diameter of about 8 microns.
The cost of preparing the wire is as follows: about 21 yuan/kg.
Example 2
(a) Adding 70 parts by weight of terylene, 20 parts by weight of silicon dioxide (granularity of 1 micron), 3 parts by weight of silicon carbide (granularity of 1 micron), 5 parts by weight of nylon elastomer Pebax, 1 part by weight of graphene, 0.5 part by weight of DSPT antioxidant, 0.5 part by weight of mineral oil lubricant and 0.2 part by weight of aminopropyltrimethoxysilane into a high-speed mixer for mixing; and controlling the water content of the mixture to less than 0.2% by weight by drying.
(b) Feeding the mixture obtained in step (a) into an extruder at a temperature of between 280 ℃ and 300 ℃ to form a molten fluid in the mixture, wherein the screw speed is 15 rpm and the temperature is kept for about 10 minutes.
(c) Extruding the melt stream obtained in step (b) through a metering pump into a spin pack and ejecting the melt stream through a spinneret.
(d) Cooling the filaments obtained in step (c) by blowing air, simultaneously stretching and twisting, and sizing to obtain filaments with a diameter of about 8 microns.
The cost of preparing the wire is as follows: about 20 yuan/kg.
Example 3
(a) Adding 70 parts by weight of chinlon, 17 parts by weight of silicon dioxide (granularity of 1.5 microns), 4 parts by weight of silicon carbide (granularity of 0.1 micron), 4 parts by weight of nylon elastomer Pebax, 0.5 part by weight of DSPT antioxidant, 0.5 part by weight of white oil lubricant and 0.4 part by weight of aminopropyl-aminoethyl triethoxysilane into a high-speed mixer for mixing; and controlling the water content of the mixture to less than 0.2% by weight by drying.
(b) Feeding the mixture obtained in step (a) into an extruder at a temperature of between 280 ℃ and 300 ℃ to form a molten fluid in the mixture, wherein the screw speed is 12 rpm and the temperature is maintained for about 8 minutes.
(c) Extruding the melt stream obtained in step (b) through a metering pump into a spin pack and ejecting the melt stream through a spinneret.
(d) Cooling the filaments obtained in step (c) by blowing air, simultaneously stretching and twisting, and sizing to obtain filaments with a diameter of about 8 microns.
The cost of preparing the wire is as follows: about 20 yuan/kg.
Example 4
(a) Adding 80 parts by weight of chinlon, 21 parts by weight of silicon dioxide (granularity of 0.1 micron), 3 parts by weight of silicon carbide (granularity of 0.1 micron), 8 parts by weight of polyester elastomer, 0.5 part by weight of DSPT antioxidant, 0.5 part by weight of mineral oil lubricant and 0.5 part by weight of isocyanate silane coupling agent into a high-speed mixer for mixing; and controlling the water content of the mixture to less than 0.2% by weight by drying.
(b) Feeding the mixture obtained in step (a) into an extruder at a temperature of between 280 ℃ and 300 ℃ to form a molten fluid in the mixture, wherein the screw speed is 10 rpm and the temperature is maintained for about 15 minutes.
(c) Extruding the melt stream obtained in step (b) through a metering pump into a spin pack and ejecting the melt stream through a spinneret.
(d) Cooling the filaments obtained in step (c) by blowing air, simultaneously stretching and twisting, and sizing to obtain filaments with a diameter of about 10 microns.
The cost of preparing the wire is as follows: about 22 yuan/kg.
Example 5 (different from example 2 in that Pebax skin, nylon elastomer)
(a) Adding 70 parts by weight of terylene, 20 parts by weight of silicon dioxide (granularity of 1 micron), 3 parts by weight of silicon carbide (granularity of 1 micron), 5 parts by weight of nylon elastomer Pebax, 1 part by weight of graphene, 0.5 part by weight of DSPT antioxidant, 0.5 part by weight of mineral oil lubricant and 0.2 part by weight of (2, 3-epoxypropoxy) propyl trimethoxy silane coupling agent into a high-speed mixer for mixing; and controlling the water content of the mixture to less than 0.2% by weight by drying.
(b) Feeding the mixture obtained in step (a) into an extruder at a temperature of between 280 ℃ and 300 ℃ to form a molten fluid in the mixture, wherein the screw speed is 15 rpm and the temperature is kept for about 10 minutes.
(c) Extruding the molten fluid obtained in step (b) and pressing the extruded molten fluid into a spinning assembly through a metering pump; wherein the molten fluid obtained in step (b) is added to the center of the spinneret orifice, and the molten nylon elastomer Pebax is added to the periphery of the spinneret orifice so as to eject the filament of the sheath-core structure.
(d) And (c) cooling the silk thread obtained in the step (c) by blowing, stretching, twisting and shaping, wherein the diameter of the obtained silk thread is about 8 microns, and the skin thickness is 3 microns.
Example 6 (differing from example 2 in that the ratio of silicon dioxide to silicon carbide is higher than 8)
(a) Adding 70 parts by weight of chinlon, 17 parts by weight of silicon dioxide (granularity of 1 micron), 2 parts by weight of silicon carbide (granularity of 1 micron), 5 parts by weight of nylon elastomer Pebax, 1 part by weight of graphene, 0.5 part by weight of DSPT antioxidant, 0.5 part by weight of mineral oil lubricant and 0.2 part by weight of dodecyl trimethoxy silane into a high-speed mixer for mixing; and controlling the water content of the mixture to less than 0.2% by weight by drying.
(b) Feeding the mixture obtained in step (a) into an extruder at a temperature of between 280 ℃ and 300 ℃ to form a molten fluid in the mixture, wherein the screw speed is 15 rpm and the temperature is kept for about 10 minutes.
(c) Extruding the melt fluid obtained in the step (b), pressing the melt fluid into a spinning assembly through a metering pump, and ejecting the melt fluid through a spinning plate, wherein the yarn is broken during spinning.
(d) Cooling the filaments obtained in step (c) by blowing air, simultaneously stretching and twisting, and sizing to obtain filaments with a diameter of about 8 microns.
The cost of preparing the wire is as follows: about 22 yuan/kg.
Example 7 (different from example 2 in that the ratio of silicon dioxide to silicon carbide is less than 4)
(a) 70 parts by weight of nylon, 10 parts by weight of silicon dioxide (granularity of 1 micron), 3 parts by weight of silicon carbide (granularity of 1 micron), 5 parts by weight of nylon elastomer Pebax, 1 part by weight of graphene, 0.5 part by weight of DSPT antioxidant, 0.5 part by weight of mineral oil lubricant and 0.2 part by weight of tetramethyl tetraethylene cyclotetrasiloxane are added into a high-speed mixer to be mixed; and controlling the water content of the mixture to less than 0.2% by weight by drying.
(b) Feeding the mixture obtained in step (a) into an extruder at a temperature of between 280 ℃ and 300 ℃ to form a molten fluid in the mixture, wherein the screw speed is 15 rpm and the temperature is kept for about 10 minutes.
(c) Extruding the melt fluid obtained in the step (b), pressing the melt fluid into a spinning assembly through a metering pump, and ejecting the melt fluid through a spinning plate, wherein the yarn is broken during spinning.
(d) Cooling the filaments obtained in step (c) by blowing air, simultaneously stretching and twisting, and sizing to obtain filaments with a diameter of about 8 microns.
The cost of preparing the wire is as follows: about 19 yuan/kg.
Comparative example 1 (different from example 1 in that elastomer and silane coupling agent were not added)
(a) 70 parts by weight of chinlon, 20 parts by weight of silicon dioxide (granularity of 1 micron) and 3 parts by weight of silicon carbide (granularity of 1 micron) are added into a high-speed mixer to be mixed; and controlling the water content of the mixture to less than 0.2% by weight by drying.
(b) Feeding the mixture obtained in step (a) into an extruder at a temperature of between 280 ℃ and 300 ℃ to form a molten fluid in the mixture, wherein the screw speed is 15 rpm and the temperature is kept for about 10 minutes.
(c) Extruding the melt fluid obtained in step (b) and pressing the extruded melt fluid into a spinning pack through a metering pump, wherein the melt fluid is sprayed out through a spinneret plate and cannot form threads.
Comparative example 2 (difference from example 1 in that no elastomer was added)
(a) 70 parts by weight of chinlon, 20 parts by weight of silicon dioxide (granularity of 1 micron), 0.2 part by weight of silane coupling agent and 3 parts by weight of silicon carbide (granularity of 1 micron) are added into a high-speed mixer to be mixed; and controlling the water content of the mixture to less than 0.2% by weight by drying.
(b) Feeding the mixture obtained in step (a) into an extruder at a temperature of between 280 ℃ and 300 ℃ to form a molten fluid in the mixture, wherein the screw speed is 15 rpm and the temperature is kept for about 10 minutes.
(c) Extruding the melt stream obtained in step (b) through a metering pump and pressing it into a spin pack, the melt stream being ejected through a spinneret and being substantially incapable of forming filaments and occasionally forming small segments of filaments.
Comparative example 3 (different from example 1 in that no silane coupling agent was added)
(a) 70 parts by weight of nylon, 20 parts by weight of silicon dioxide (granularity of 1 micron), 5 parts by weight of nylon elastomer Pebax and 3 parts by weight of silicon carbide (granularity of 1 micron) are added into a high-speed mixer to be mixed; and controlling the water content of the mixture to less than 0.2% by weight by drying.
(b) Feeding the mixture obtained in step (a) into an extruder at a temperature of between 280 ℃ and 300 ℃ to form a molten fluid in the mixture, wherein the screw speed is 15 rpm and the temperature is kept for about 10 minutes.
(c) Extruding the melt fluid obtained in the step (b), pressing the melt fluid into a spinning pack through a metering pump, and spraying the melt fluid through a spinning plate to form silk threads in general, wherein silk breakage is frequently caused during spinning.
The cut-resistant fibres prepared in examples 1 to 7 and comparative example 3 were made into gloves, tested for their cut resistance according to european standard EN388, and tested for tensile strength according to ISO11566, the results of which are shown in table 1:
TABLE 1
As can be seen from the results in table 1: 1) in the absence of the silane coupling agent and the elastomer, the mixture of the polyester and/or nylon, silica, and silicon carbide could not or substantially not be spun, and even if a yarn was barely formed, the tensile strength was relatively poor and the yarn was easily broken (for example, comparative examples 1 to 3); 2) when the ratio of silica to silicon carbide is between 4 and 8, the cut resistance and tensile strength can be significantly enhanced, while outside this ratio range, the tensile strength and cut resistance are less than ideal although the mixture can form filaments (e.g., examples 6 and 7); 3) the particle size of the silica, silicon carbide, and graphene cannot be too small, which can reduce cut resistance (e.g., example 4).
Claims (18)
1. A composition for making cut resistant fibers, the composition comprising the following components: terylene and/or chinlon, silicon dioxide, silicon carbide, elastomer and silane coupling agent; wherein the weight ratio of the silicon dioxide to the silicon carbide is 4-8; 70-80 parts of terylene and/or chinlon, 17-25 parts of silicon dioxide, 3-5 parts of silicon carbide, 3-8 parts of elastomer and 0.05-0.5 part of silane coupling agent; the particle size of the silicon dioxide is 1-10 microns; the granularity of the silicon carbide is 1-10 microns; the elastomer is a nylon elastomer and/or a polyester elastomer.
2. The composition for making cut-resistant fibers of claim 1, wherein the composition further comprises graphene.
3. The composition for preparing cut-resistant fiber according to claim 2, wherein the graphene is contained in an amount of 0.5-5 parts by weight.
4. The composition for making cut resistant fibers of claim 1, wherein the composition further comprises an antioxidant and/or a lubricant.
5. The composition for preparing cut-resistant fiber according to claim 4, wherein the antioxidant is contained in an amount of 0.1 to 1 part by weight.
6. The composition for preparing cut-resistant fiber according to claim 4, wherein the lubricant is contained in an amount of 0.1 to 1 part by weight.
7. A cut resistant fiber prepared from the composition of any one of claims 1-6.
8. Cut resistant fiber according to claim 7, wherein the cut resistant fiber has a sheath-core structure, the core being prepared from the composition of any one of claims 1-6.
9. The cut resistant fiber of claim 8, wherein the sheath is prepared from the elastomer.
10. The cut resistant fiber of claim 9, wherein the sheath has a thickness of 2.5-5 millimeters and the core has a diameter of 8-10 millimeters.
11. A method of making cut resistant fibers, comprising the steps of:
a. mixing: mixing terylene and/or chinlon, silicon dioxide, silicon carbide, elastomer and silane coupling agent uniformly; wherein the ratio of silicon dioxide to the silicon carbide is 4-8; 70-80 parts of terylene and/or chinlon, 17-25 parts of silicon dioxide, 3-5 parts of silicon carbide, 3-8 parts of elastomer and 0.05-0.5 part of silane coupling agent; the particle size of the silicon dioxide is 1-10 microns; the granularity of the silicon carbide is 1-10 microns; the elastomer is a nylon elastomer and/or a polyester elastomer;
b. preparing a molten fluid;
c. spinning;
d. and (5) post-treatment.
12. The method for preparing cut-resistant fiber as claimed in claim 11, wherein, in step b, the mixture is stirred at 330 ℃ and 270 ℃.
13. The method for preparing cut-resistant fiber as claimed in claim 11, wherein, in step b, the mixture is maintained at 270 ℃ and 330 ℃ for 5-15 minutes.
14. The method for preparing a cut-resistant fiber according to claim 11, wherein graphene is further added in the step a, and the content of the graphene is 0.5-5 parts by weight.
15. The method for preparing cut-resistant fiber according to claim 14, wherein an antioxidant and/or a lubricant is further added in step a, the content of the antioxidant is 0.1-1 part by weight, and the content of the lubricant is 0.1-1 part by weight.
16. The process for making cut resistant fibers of claim 11 wherein in step c a spinning apparatus is used that can eject a sheath-core structure wherein the molten fluid formed in step b forms the core and the elastomer forms the sheath.
17. Use of a cut-resistant fiber according to any one of claims 7 to 10 for the preparation of a cut-resistant material.
18. Use according to claim 17, the cut-resistant material being for a helmet liner, apron, glove, knee pad, armguard, shoe upper or cord.
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| CN113897696A (en) * | 2021-11-03 | 2022-01-07 | 福建永荣锦江股份有限公司 | Preparation method of anti-cutting polyamide 6 fiber |
| CN116784547A (en) * | 2022-03-17 | 2023-09-22 | 南通强生新材料科技股份有限公司 | Anti-cutting protective glove and preparation method thereof |
| CN115074857B (en) * | 2022-08-02 | 2023-09-29 | 江苏康溢臣生命科技有限公司 | Cool iodine antibacterial fiber and preparation method thereof |
| CN115637505B (en) * | 2022-09-07 | 2023-07-21 | 江苏江南高纤股份有限公司 | Regenerated polyester staple fiber and production process thereof |
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