CN110205695B - High-cutting-prevention ultrahigh molecular weight polyethylene fiber and preparation method thereof - Google Patents

High-cutting-prevention ultrahigh molecular weight polyethylene fiber and preparation method thereof Download PDF

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CN110205695B
CN110205695B CN201910379633.0A CN201910379633A CN110205695B CN 110205695 B CN110205695 B CN 110205695B CN 201910379633 A CN201910379633 A CN 201910379633A CN 110205695 B CN110205695 B CN 110205695B
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molecular weight
powder
weight polyethylene
cutting
ultra
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CN110205695A (en
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周星余
周海涛
周红波
赵勇
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Shandong Xingyu Chengyang New Materials Co ltd
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Xingyu Security And Protection Technology Co ltd
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    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01FCHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00General methods for the manufacture of artificial filaments or the like
    • D01F1/02Addition of substances to the spinning solution or to the melt
    • D01F1/10Other agents for modifying properties
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01FCHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/44Monocomponent 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
    • D01F6/46Monocomponent 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

Abstract

The invention relates to a preparation method of a high-cutting-prevention ultrahigh molecular weight polyethylene fiber, which comprises the following steps: carrying out surface optimization treatment on the superfine inorganic powder to remove corners of sharp superfine inorganic powder particles and simultaneously forming uneven three-dimensional grains on the surface to prepare the superfine inorganic powder additive; mixing and emulsifying the superfine inorganic powder additive, a solvent and a surfactant to prepare an additive emulsified material; dispersing the additive emulsified material and the ultra-high molecular weight polyethylene powder with the molecular weight of 20-150 ten thousand into a solvent together to prepare a mixture; and (3) blending and extruding the mixture through an extruder, cooling and forming through a coagulating bath to obtain nascent fiber, and extracting, drying and carrying out multistage hot drawing on the nascent fiber to obtain the high-cutting-prevention ultrahigh molecular weight polyethylene fiber. Tests prove that the gloves knitted by the high-cutting-prevention ultra-high molecular weight polyethylene fibers have soft hand feeling, no prickling feeling, comfortable wearing, good durability and slow cutting resistance loss, and the cutting-prevention grade reaches 3-5 grades through EN388-2003 tests.

Description

High-cutting-prevention ultrahigh molecular weight polyethylene fiber and preparation method thereof
Technical Field
The invention relates to the technical field of polyethylene fibers, in particular to a high-cutting-prevention ultrahigh molecular weight polyethylene fiber and a preparation method thereof.
Background
The ultra-high molecular weight polyethylene fiber is the fiber with the highest specific strength in the existing industrialized fiber materials, has excellent properties of high strength, high modulus, wear resistance, chemical corrosion resistance and the like, and is widely applied to the fields of national defense and military, maritime work mooring ropes, individual protection and the like. Along with the continuous deepening of military and civil integration, the application of the ultra-high molecular weight polyethylene fiber in the civil market is gradually increased, wherein the civil market mainly comprising the cut-proof gloves gradually takes a leading position. At present, the cutting grade of protective gloves made of commonly used 400D ultrahigh molecular weight polyethylene fibers is highest grade 3 of EN388-2003 standard, and the protective gloves are very unstable and are not more and more suitable for the requirements of protecting the injury from the cut in the actual working environment.
In order to improve the cutting-resistant grade of the gloves, the common method is to blend and weave materials such as glass fiber and steel wire with the ultra-high molecular weight polyethylene fiber, so as to achieve the purpose of improving the cutting-resistant grade. Although the method can improve the cutting resistance of the gloves, the steel wires are hard (the steel wires are hard and are not easy to wear and the comfort is poor), the glass fibers are brittle and easy to break and expose, the hand feeling of the gloves is poor, the wearing comfort is low, the burrs of the glass fibers easily cause secondary damage such as itching, pricking and poking on the hands, and the compatibility of the protective performance and the comfort cannot be realized.
In view of the above, the inventors of the present invention desire to provide a novel anti-cutting ultra-high molecular weight polyethylene fiber, which can be directly woven into anti-cutting gloves or anti-cutting clothes without blending with glass fiber or steel wire, so that the anti-cutting gloves or anti-cutting clothes have both high anti-cutting performance and wearing comfort.
Disclosure of Invention
Technical problem to be solved
In view of the above problems, the invention provides a preparation method of high anti-cutting ultrahigh molecular weight polyethylene fiber, the high anti-cutting ultrahigh molecular weight polyethylene fiber prepared by the preparation method can be woven into anti-cutting gloves or anti-cutting protective clothing and the like, and high-strength protective performance and better wearing comfort are realized; meanwhile, the preparation process of the invention is more reasonable in design, so that the high-cutting-resistant ultra-high molecular weight polyethylene fiber has better durability.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
a preparation method of high-cut-resistant ultra-high molecular weight polyethylene fibers comprises the following steps:
carrying out surface optimization treatment on the superfine inorganic powder to remove corners of sharp superfine inorganic powder particles and simultaneously forming uneven three-dimensional grains on the surface to prepare the superfine inorganic powder additive;
mixing and emulsifying the superfine inorganic powder additive, a first solvent and a surfactant to prepare an additive emulsified material;
dispersing the additive emulsion material and ultrahigh molecular weight polyethylene powder with the molecular weight of 20-150 ten thousand into a second solvent together to prepare a mixture;
and (3) blending and extruding the mixture through an extruder, cooling and forming through a coagulating bath to obtain nascent fibers, and extracting, drying and carrying out multi-stage hot drawing on the nascent fibers to obtain the high-cutting-prevention ultrahigh molecular weight polyethylene fibers.
In a preferred embodiment of the present invention, the ultrafine inorganic powder is one or more selected from the group consisting of tungsten carbide powder, tungsten oxide powder, copper carbide powder, boron nitride powder, ceramic powder, glass powder, and mineral rock wool powder.
More preferably, the ultrafine inorganic powder additive is a combination of two or more powders, such as: tungsten carbide in combination with ceramic powder, copper carbide in combination with glass powder, mineral rock wool panels in combination with boron nitride powder, and tungsten oxide in combination with glass powder.
In a preferred embodiment of the present invention, the particle size of the ultra-fine inorganic powder additive is 0.1 to 100 μm, preferably 20 to 60 μm.
In a preferred embodiment of the invention, the ceramic powder is obtained by crushing waste ceramics; the glass powder is prepared by crushing waste glass; the mineral rock wool powder is prepared by crushing waste mineral rock wool boards.
In a preferred embodiment of the present invention, the method of surface optimization treatment is any one or a combination of the following: acid etching, chemical polishing and sanding by a sanding machine; preferably, the acid etching is carried out, and after the acid etching treatment, irregular uneven lines can be clearly seen on the surfaces of the ultrafine inorganic powder particles through an electron microscope.
The sharp corners of the ultrafine inorganic powder particles are removed through the surface optimization treatment, and rugged three-dimensional grains are formed on the surfaces of the particles, so that the specific surface area of the particles is increased.
Wherein, sharp corners of the inorganic powder particles are removed to prevent the ultrafine inorganic powder particles from puncturing the ultrahigh molecular weight polyethylene fiber matrix material and separating out from the matrix material; in other words, the interface fusion and/or wettability of the superfine inorganic powder particles, the solvent and the ultra-high molecular weight polyethylene powder after the sharp edges and corners are removed, so that the high cutting-resistant polyethylene fiber with better performance is obtained.
Wherein, uneven three-dimensional lines are formed on the surfaces of the ultrafine inorganic powder particles, which is helpful for increasing the surface area of the ultrafine inorganic powder particles combined with the ultrahigh molecular weight polyethylene fiber matrix material. After solidification, the ultra-high molecular weight polyethylene fiber matrix material and the uneven surfaces of the inorganic powder particles are mutually combined in a zigzag embedded manner, so that the combination stability of the inorganic powder particles in the polyethylene matrix material is improved, and the inorganic powder particles are prevented from migrating and even separating out in the polyethylene matrix material. In addition, the surface optimization treatment also has a depolymerization function, so that the particle surface of the superfine inorganic powder is in a monodisperse state, and can be dispersed in the ultrahigh molecular weight polyethylene fiber matrix material with high uniformity, thereby being beneficial to obtaining the ultrahigh molecular weight polyethylene fiber with more stable and uniform anti-cutting performance.
The grinding treatment of the grinding machine is to mix superfine inorganic powder with grinding beads such as zirconia and the like, put the mixture into the grinding machine, remove sharp corners on the particle surface of the superfine inorganic powder by the grinding beads under the rotation of the grinding machine, and form uneven three-dimensional grains on the particle surface.
In a preferred embodiment of the present invention, the mass ratio of the ultra-high molecular weight polyethylene, the ultra-fine inorganic powder additive and the solvent is 10-40: 0.2-1: 100; the mass of the solvent refers to the sum of the masses of the first solvent and the second solvent. According to the mass ratio, the prepared mixture is pasty, and ultrafine inorganic powder additives which have good anti-cutting effect are dispersed in the mixture.
In a preferred embodiment of the present invention, the ultra-high molecular weight polyethylene preferably has a molecular weight of 40 to 80 ten thousand.
In a preferred embodiment of the present invention, the extruder is a twin-screw extruder, and the temperature of each zone of the twin-screw extruder is controlled between 100 ℃ and 300 ℃.
In a preferred embodiment of the present invention, the first solvent and the second solvent are one or more selected from white oil, mineral oil, vegetable oil, paraffin oil and decalin.
In a preferred embodiment of the invention, the surfactant is alkylolamide (6502), which is a mild non-ionic surfactant formed by the condensation of coconut oil or palm kernel oil and diethanolamine, or the surfactant is alkylolamide phosphate. These surfactants have solubilizing and emulsifying effects, have antistatic conditioning effects, have no skin irritation, and are commonly used as detergents, laundry care agents, and the like. Of course, the surfactant is not limited to the above, but any surfactant that can emulsify and increase the degree of dispersion of the inorganic powder in the solvent may be used, such as stearic acid, sodium dodecylbenzenesulfonate, Alkylglucoside (APG), triethanolamine, fatty glyceride, sorbitan fatty acid (span), polysorbate (tween), sodium dioctyl sulfosuccinate (aloso-OT), sodium dodecylbenzenesulfonate, sodium glycocholate, and the like.
The invention relates to a high-cutting-prevention ultra-high molecular weight polyethylene fiber which is prepared by adopting the preparation method carried by any one of the embodiments.
The invention also relates to a high-cutting-prevention glove or cutting-prevention clothes, which comprises a braided fabric formed by braiding the high-cutting-prevention ultrahigh molecular weight polyethylene fiber prepared by any one of the embodiments or the preparation methods.
(III) advantageous effects
The invention has the beneficial effects that:
the invention obtains the ultra-high molecular weight polyethylene fiber with high anti-cutting performance by taking the ultra-fine inorganic powder particles as the additive and dispersing the ultra-high molecular weight polyethylene powder particles in the ultra-high molecular weight polyethylene fiber matrix material. Compared with the method for blending and weaving the glass fiber, the steel wire and other materials with the ultra-high molecular weight polyethylene fiber in the prior art, the gloves or glove blanks woven by the ultra-high molecular weight polyethylene fiber with high cutting resistance have better wearing comfort, such as softness, better touch feeling, no burr, pruritus, poking and scratching and other problems, and are easy to wear.
When the ultra-high molecular weight polyethylene fiber with high anti-cutting performance is prepared, after the surface of the ultra-fine inorganic powder is optimized, the superfine inorganic powder additive is prepared and directly participates in the preparation process of the ultra-high molecular weight polyethylene nascent fiber, and specifically, the superfine inorganic powder additive is firstly prepared into an additive emulsified material, then dispersing the mixture and the ultra-high molecular weight polyethylene powder together in a solvent to prepare a mixture, blending and extruding the mixture by adopting a screw extruder to prepare nascent fiber, so that the ultra-fine inorganic powder can be very uniformly and very stably fused into the ultra-high molecular weight polyethylene fiber matrix, the ultra-high molecular weight polyethylene fiber is combined into stable solid, so that the ultra-high molecular weight polyethylene fiber is used as a solid dispersant of inorganic powder, thereby preparing the ultra-high molecular weight polyethylene fiber with more excellent and uniform cutting resistance and better quality.
The surface optimization treatment is carried out on the superfine inorganic powder, sharp corners of superfine inorganic powder particles are removed, rugged three-dimensional grains are formed on the surfaces of the particles, and the specific surface area of the particles is increased, so that the combination stability of the superfine inorganic powder additive in a high molecular weight polyethylene matrix is improved. Compared with the superfine inorganic powder additive without surface optimization treatment, the anti-cutting performance of the anti-cutting ultrahigh molecular weight polyethylene fiber prepared by the invention is more durable, and the quality of the anti-cutting polyethylene fiber product is more uniform and stable.
In addition, it is further preferable that the ultra-fine inorganic powder additive used in the present invention is preferably a combination of two or more kinds of inorganic powders, and by combining different inorganic powders, the excellent characteristics of the two or more kinds of inorganic powders are complemented and synergized, and the effects including the improvement of the cut-preventing performance or the improvement of the dispersion uniformity and the fusion firmness of these ultra-fine inorganic powder additives in the ultra-high molecular weight polyethylene fiber matrix material, and the improvement of the durability of the cut-preventing protective glove can be obtained more than the single inorganic powder additive.
The high-cutting-resistant ultrahigh molecular weight polyethylene fiber prepared by the method greatly improves the cutting-resistant performance of the polyethylene fiber, and the cutting-resistant grade of woven fabrics such as gloves and the like can stably reach grade 5 of EN388-2003 standard. More importantly, the high anti-cutting ultrahigh molecular weight polyethylene fiber produced according to the invention does not need to be blended and reinforced with materials such as steel wires, glass fibers and the like, and the prepared protective gloves are soft in texture, light, flexible, not easy to fatigue after being worn for a long time, durable and capable of realizing both high anti-cutting and wearing comfort.
Detailed Description
In order that the invention may be better understood, it is described in detail below with reference to specific examples.
The overall concept of the invention is as follows: the method comprises the steps of firstly carrying out surface optimization treatment on a certain amount of ultrafine inorganic powder particles, using the ultrafine inorganic powder particles as an additive for preparing the ultrahigh molecular weight polyethylene nascent fiber, enabling the ultrafine inorganic powder particles to be uniformly and stably fused into an ultrahigh molecular weight polyethylene fiber matrix, combining the ultrafine inorganic powder particles and the ultrahigh molecular weight polyethylene fiber into a stable solid, and finally carrying out conventional extraction, drying and multistage hot drawing on the nascent fiber to prepare the high-cutting-prevention ultrahigh molecular weight polyethylene fiber.
Preferably, the specific preparation method comprises the following steps:
(1) preparation of additive A
The additive A is superfine inorganic powder, and can be one or more of tungsten carbide powder, tungsten oxide powder, copper carbide powder, boron nitride powder, ceramic powder, glass powder and mineral rock wool powder; preferably, the particle size of the ultrafine inorganic powder is 0.1 to 100. mu.m, more preferably 20 to 60 μm.
The ceramic powder can be prepared by crushing and sieving waste ceramics. The glass powder can be prepared by crushing and sieving waste glass. The mineral rock wool powder mainly contains natural basalt, and can be prepared by pulverizing waste mineral rock wool board and sieving.
(2) Subjecting additive A to surface optimization treatment
The surface optimization treatment mainly has the functions of removing sharp corners of ultrafine inorganic powder particles and forming rugged three-dimensional grains on the surfaces of the particles. The corners are removed to prevent the ultra-high molecular weight polyethylene material from being punctured and separated out by the ultrafine inorganic powder particles with sharp corners, and rugged three-dimensional lines are formed on the surfaces of the particles, so that the surface area of the ultrafine inorganic powder particles can be greatly increased, and the bonding firmness and stability of the ultrafine inorganic powder particles and the polyethylene material are improved.
In addition, the surface optimization treatment can also perform the functions of depolymerizing the ultrafine inorganic powder which is easy to agglomerate, removing the powder with too fine particle size, removing impurities and the like.
Preferably, the surface optimization treatment may be performed by a method including: acid etching, chemical polishing, sanding with a sander, etc., preferably acid etching.
The grinding treatment is to mix superfine inorganic powder with grinding beads such as zirconia, put the mixture into a grinding machine, remove sharp corners on the particle surface of the superfine inorganic powder under the rotation of the grinding machine, collide and rub the particle surface to form uneven three-dimensional grains, depolymerize the powder, make the particles of the superfine inorganic powder in a monodispersed state as much as possible, so as to better disperse and emulsify in a solvent, and obtain an additive emulsified material.
After surface optimization treatment, the interface fusion property and/or the wettability of the superfine inorganic powder additive, a solvent and the ultra-high molecular weight polyethylene powder can be improved, so that the dispersity of the superfine inorganic powder is better, and the superfine inorganic powder is combined more firmly in the ultra-high molecular weight polyethylene fiber matrix material, and the high cutting-resistant polyethylene fiber with better performance is obtained.
(3) Additive emulsion B
Taking a part of solvent, adding the treated additive A and a surfactant into the part of solvent, and performing high-shear emulsification to prepare an additive emulsified material B.
(4) Preparing a mixture C: adding the ultra-high molecular weight polyethylene powder with the molecular weight of 20-150 ten thousand (preferably 40-80 ten thousand) and the emulsified material B into the rest solvent to prepare a mixed material C.
Wherein, the ultra-high molecular weight polyethylene: additive A: the ratio of the total mass of the solvent is (10-40): (0.2-1): 100.
wherein the solvent is one or more selected from white oil, mineral oil, vegetable oil, paraffin oil and decalin.
(5) Anti-cutting polyethylene fiber
Blending and extruding the mixture C through a double-screw extruder, and cooling and forming through a coagulating bath to obtain nascent fiber, wherein the temperature of each area of the double screws is controlled between 100 ℃ and 300 ℃; and extracting the nascent fiber, drying, and performing multi-stage hot drawing to prepare the high-cut-resistant ultra-high molecular weight polyethylene fiber.
The technical effects of the scheme of the invention are further explained by combining specific embodiments.
Example 1
The embodiment provides a preparation method of a high-cut-prevention ultra-high molecular weight polyethylene fiber, which comprises the following steps:
(1) taking 750g of tungsten carbide powder and ceramic powder with the particle size of 10-20um, wherein the tungsten carbide powder comprises the following components in parts by weight: and (3) carrying out acid etching treatment on the mixed powder by using hydrofluoric acid at the mass ratio of 1:2 for 1 h.
(2) Weighing 100kg of white oil, taking out 5kg of the white oil, adding the treated mixed powder and 5ml of surfactant (disodium lauryl sulfosuccinate) into the 5kg of white oil, and performing high-shear emulsification, wherein the shear rate is 2800r/min, and the emulsification time is 30min, so as to obtain a mixed powder emulsified material.
(3) Taking 15kg of ultra-high molecular weight polyethylene powder with the molecular weight of 80 ten thousand and the average grain diameter of 100um, adding the 15kg of ultra-high molecular weight polyethylene powder and the emulsified mixed powder emulsion material into the remaining 95kg of white oil, and uniformly mixing for 1 hour to obtain a mixture.
(4) And (3) blending and extruding the mixed mixture by a double-screw extruder, cooling and forming by a coagulating bath to obtain nascent fiber, and extracting, drying and carrying out multi-stage hot drawing on the obtained nascent fiber to obtain the ultra-high molecular weight polyethylene high-cut-resistant fiber.
The cutting-proof gloves made of the fiber have soft hand feeling, no pricked feeling, durability and comfortable wearing, and the cutting-proof grade is 5 grade according to EN388-2003 test.
Example 2
The embodiment provides a preparation method of a high-cut-prevention ultra-high molecular weight polyethylene fiber, which comprises the following steps:
(1) taking 800g of copper carbide powder and glass powder with the particle size of 20-30um, wherein the weight ratio of the copper carbide powder to the glass powder is as follows: and (3) carrying out acid etching treatment on the mixed powder by using hydrofluoric acid at the mass ratio of the glass powder to the glass powder of 1:2.5, wherein the acid etching time is 1 h.
(2) Weighing 100kg of white oil, taking out 5kg of the white oil, adding the treated mixed powder and 15ml of surfactant (disodium coconut monoethanolamide sulfosuccinate DMSS) into the 5kg of white oil, and performing high-shear emulsification at a shear rate of 2800r/min for 30min to obtain a mixed powder emulsified material.
(3) Taking 20kg of ultra-high molecular weight polyethylene powder with the molecular weight of 100 ten thousand and the average grain diameter of 100um, adding the taken 20kg of ultra-high molecular weight polyethylene powder and the emulsified mixed powder emulsion material into the remaining 95kg of white oil, and uniformly mixing for 1h to obtain a mixture.
(4) And (3) blending and extruding the mixed mixture by a double-screw extruder, cooling and forming by a coagulating bath to obtain nascent fiber, and extracting, drying and carrying out multi-stage hot drawing on the obtained nascent fiber to obtain the ultra-high molecular weight polyethylene high-cut-resistant fiber.
The cutting-proof gloves made of the fiber have soft hand feeling, no pricked feeling, durability and comfortable wearing, and the cutting-proof grade is 5 grade according to EN388-2003 test.
Example 3
The embodiment provides a preparation method of a high-cut-prevention ultra-high molecular weight polyethylene fiber, which comprises the following steps:
(1) taking 1000g of mineral rock wool powder and boron nitride powder with the particle size of 30-60um, wherein the mineral rock wool powder: and the mass ratio of the boron nitride powder is 1:1, and the mixed powder is subjected to acid etching treatment by hydrofluoric acid for 1 h.
(2) Weighing 100kg of white oil, taking out 5kg of the white oil, adding the treated mixed powder and 10ml of surfactant (monolauryl phosphate MAP) into the 5kg of white oil, and performing high-shear emulsification at a shear rate of 2800r/min for 30min to obtain a mixed powder emulsified material.
(3) Taking 10kg of ultra-high molecular weight polyethylene powder with the molecular weight of 150 ten thousand and the average grain diameter of 100um, adding the taken 10kg of ultra-high molecular weight polyethylene powder and the emulsified mixed powder emulsion material into the remaining 95kg of white oil, and uniformly mixing for 1h to obtain a mixture.
(4) And (3) blending and extruding the mixed mixture by a double-screw extruder, cooling and forming by a coagulating bath to obtain nascent fiber, and extracting, drying and carrying out multi-stage hot drawing on the obtained nascent fiber to obtain the ultra-high molecular weight polyethylene high-cut-resistant fiber.
The cutting-proof gloves made of the fiber have soft hand feeling, no pricked feeling, durability and comfortable wearing, and the cutting-proof grade is 5 grade according to EN388-2003 test.
Example 4
The embodiment provides a preparation method of a high-cut-prevention ultra-high molecular weight polyethylene fiber, which comprises the following steps:
(1) taking 750g of tungsten oxide and glass powder with the particle size of 20-30um, wherein the tungsten oxide powder comprises the following components in parts by weight: the mass ratio of the glass powder is 1: and 2, carrying out acid etching treatment on the mixed powder by using hydrofluoric acid, wherein the acid etching time is 1 h.
(2) Weighing 100kg of white oil, taking out 5kg of the white oil, adding the treated mixed powder and 10ml of surfactant (potassium monododecyl phosphate MAPK) into the 5kg of the white oil, and performing high-shear emulsification at a shear rate of 2800r/min for 30min to obtain a mixed powder emulsified material.
(3) Taking 20kg of ultra-high molecular weight polyethylene powder with the molecular weight of 100 ten thousand and the average grain diameter of 100um, adding the taken 20kg of ultra-high molecular weight polyethylene powder and the emulsified mixed powder emulsion material into the remaining 95kg of white oil, and uniformly mixing for 1h to obtain a mixture.
(4) And (3) blending and extruding the mixed mixture by a double-screw extruder, cooling and forming by a coagulating bath to obtain nascent fiber, and extracting, drying and carrying out multi-stage hot drawing on the obtained nascent fiber to obtain the ultra-high molecular weight polyethylene high-cut-resistant fiber.
The cutting-proof gloves made of the fiber have soft hand feeling, no pricked feeling, durability and comfortable wearing, and the cutting-proof grade is 5 grade according to EN388-2003 test.
Example 5
The embodiment provides a preparation method of a high-cut-prevention ultra-high molecular weight polyethylene fiber, which comprises the following steps:
(1) 500g of ceramic powder with the grain diameter of 50-80um and 300g of glass powder with the grain diameter of 20-30um are taken to form mixed powder, and hydrofluoric acid is used for carrying out acid etching treatment on the mixed powder for 1 h.
(2) Weighing 100kg of white oil, taking out 5kg of the white oil, adding the treated mixed powder and 10ml of surfactant (lauryl alcohol ether phosphate) into the 5kg of white oil, and performing high-shear emulsification, wherein the shear rate is 2800r/min, and the emulsification time is 30min, so as to obtain the ceramic and glass powder emulsified material.
(3) Taking 40kg of ultra-high molecular weight polyethylene powder with the molecular weight of 40 ten thousand and the average grain diameter of 100um, adding the 40kg of ultra-high molecular weight polyethylene powder and the emulsified ceramic and glass powder emulsion material into the remaining 95kg of white oil, and uniformly mixing for 1h to obtain a mixture.
(4) And (3) blending and extruding the mixed mixture by a double-screw extruder, cooling and forming by a coagulating bath to obtain nascent fiber, and extracting, drying and carrying out multi-stage hot drawing on the obtained nascent fiber to obtain the ultra-high molecular weight polyethylene high-cut-resistant fiber.
The cutting-proof gloves made of the fiber have soft hand feeling, no pricked feeling, durability and comfortable wearing, and the cutting-proof grade is 3 grade according to EN388-2003 test.
Example 6
The embodiment provides a preparation method of a high-cut-prevention ultra-high molecular weight polyethylene fiber, which comprises the following steps:
(1) 600g of boron nitride powder with the grain diameter of 40-60um is taken, and the boron nitride powder is chemically polished by hydrofluoric acid for 1 h.
(2) Weighing 100kg of vegetable oil, taking out 5kg of vegetable oil, adding the treated boron nitride powder and 10ml of surfactant (potassium laureth phosphate MAEPK) into the 5kg of vegetable oil, and performing high-shear emulsification at a shear rate of 2800r/min for 30min to obtain the boron nitride powder emulsified material.
(3) Taking 30kg of ultra-high molecular weight polyethylene powder with the molecular weight of 40 ten thousand and the average grain diameter of 100um, adding the taken 30kg of ultra-high molecular weight polyethylene powder and the emulsified boron nitride powder emulsified material into the remaining 95kg of vegetable oil, and uniformly mixing for 1h to obtain a mixture.
(4) And (3) blending and extruding the mixed mixture by a double-screw extruder, cooling and forming by a coagulating bath to obtain nascent fiber, and extracting, drying and carrying out multi-stage hot drawing on the obtained nascent fiber to obtain the ultra-high molecular weight polyethylene high-cut-resistant fiber.
The cutting-proof gloves made of the fiber have soft hand feeling, no pricked feeling, durability and comfortable wearing, and the cutting-proof grade is 3 grade according to EN388-2003 test.
Example 7
The embodiment provides a preparation method of a high-cut-prevention ultra-high molecular weight polyethylene fiber, which comprises the following steps:
(1) taking 600g of copper carbide powder with the grain diameter of 40-60um, and chemically polishing the copper carbide powder by hydrofluoric acid for 1 h.
(2) 100kg of paraffin oil is weighed, 5kg of paraffin oil is taken out, the treated copper carbide powder and 10ml of surfactant (fatty alcohol polyoxyethylene ether (EO ═ 3) ammonium sulfate) are added into the 5kg of paraffin oil for high-shear emulsification, the shear rate is 2800r/min, and the emulsification time is 30min, so that the copper carbide powder emulsified material is obtained.
(3) Taking 30kg of ultra-high molecular weight polyethylene powder with the molecular weight of 60 ten thousand and the average grain diameter of 100um, adding the taken 30kg of ultra-high molecular weight polyethylene powder and the emulsified copper carbide powder emulsion material into the remaining 95kg of paraffin oil, and uniformly mixing for 1h to obtain a mixture.
(4) And (3) blending and extruding the mixed mixture by a double-screw extruder, cooling and forming by a coagulating bath to obtain nascent fiber, and extracting, drying and carrying out multi-stage hot drawing on the obtained nascent fiber to obtain the ultra-high molecular weight polyethylene high-cut-resistant fiber.
The cutting-proof gloves made of the fiber have soft hand feeling, no pricked feeling, durability and comfortable wearing, and the cutting-proof grade is 4 grade according to EN388-2003 test.
Example 8
The embodiment provides a preparation method of a high-cut-prevention ultra-high molecular weight polyethylene fiber, which comprises the following steps:
(1) taking 800g of tungsten oxide powder with the particle size of 20-30um, and carrying out chemical acid etching on the tungsten oxide powder by hydrofluoric acid for 1 h.
(2) Weighing 100kg of decahydronaphthalene, taking out 5kg of decahydronaphthalene, adding the treated tungsten oxide powder and 10ml of surfactant (coconut monoethanolamide) into the 5kg of decahydronaphthalene, and performing high-shear emulsification at a shear rate of 2800r/min for 30min to obtain a tungsten oxide powder emulsified material.
(3) Taking 25kg of ultra-high molecular weight polyethylene powder with the molecular weight of 60 ten thousand and the average particle size of 100um, adding the 25kg of ultra-high molecular weight polyethylene powder and the emulsified tungsten oxide powder into the remaining 90kg of decalin oil, and uniformly mixing for 1h to obtain a mixture.
(4) And (3) blending and extruding the mixed mixture by a double-screw extruder, cooling and forming by a coagulating bath to obtain nascent fiber, and drying the obtained nascent fiber by hot air and carrying out multistage hot drawing to obtain the ultrahigh molecular weight polyethylene high-cut-resistant fiber.
The cutting-proof gloves made of the fiber have soft hand feeling, no pricked feeling, durability and comfortable wearing, and the cutting-proof grade is 5 grade according to EN388-2003 test.
Comparative example 1
The comparative example relates to a preparation method of a high cut-resistant ultra-high molecular weight polyethylene fiber, which comprises the following steps:
(1) taking 1000g of mineral rock wool and boron nitride powder with the particle size of 30-60um, wherein the mineral rock wool powder: the mass ratio of the boron nitride powder is 1:1, and surface optimization treatment is not carried out;
(2) weighing 100kg of white oil, taking out 5kg of the white oil, adding mineral rock wool, boron nitride powder and 15ml of surfactant (disodium lauryl sulfosuccinate) into the 5kg of the white oil, and performing high-shear emulsification, wherein the shear rate is 2800r/min, and the emulsification time is 30min, so as to obtain the mineral rock wool and boron nitride powder emulsified material.
(3) Taking 15kg of ultra-high molecular weight polyethylene powder with the molecular weight of 80 ten thousand and the average grain diameter of 100um, adding the 15kg of ultra-high molecular weight polyethylene powder, mineral rock wool and boron nitride powder emulsion material into the remaining 95kg of white oil, and uniformly mixing for 1h to obtain a mixture.
(4) And (3) blending and extruding the mixed mixture by a double-screw extruder, cooling and forming by a coagulating bath to obtain nascent fiber, and extracting, drying and carrying out multi-stage hot drawing on the obtained nascent fiber to obtain the ultra-high molecular weight polyethylene high-cut-resistant fiber.
The cutting-proof gloves made of the fiber have soft hand feeling, no pricked feeling, durability and comfortable wearing, and the cutting-proof grade is 3 grade according to EN388-2003 test.
The 13-pin protective gloves made of the high cut-resistant ultra-high molecular weight polyethylene fibers prepared in examples 1 to 8 and comparative example 1 were subjected to the cut-resistant performance test, and the test results are shown in the following table:
test index EN388-2003 test data EN388-2003 rating After wearing for 1 day
Example 1 20.5 5 20.5
Example 2 21.2 5 20.9
Example 3 21.8 5 21.6
Example 4 21.0 5 20.5
Example 5 6.9 3 6.5
Example 6 7.4 3 7.2
Example 7 13.0 4 13.1
Example 8 20.4 5 20.3
Comparative example 1 6.1 3 5.0
In the test results, the cutting resistance test is carried out after workers on the same post and the same operation and the same working strength are worn and used for 1 day.
The test results of the above examples show that the cut-resistant grade of the fabric such as gloves woven by the high cut-resistant ultra-high molecular weight polyethylene fiber of the invention can stably reach grade 5 of EN 388-2003. More importantly, the high-cutting-resistance ultra-high molecular weight polyethylene fiber produced according to the invention does not need to be blended with materials such as steel wires and glass fibers for reinforcement, and the manufactured protective gloves are soft, light, sensitive and comfortable to wear, and are not easy to fatigue after being worn for a long time. Compared with the comparative example, whether the surface optimization treatment is carried out on the superfine inorganic powder or not has great difference in the durability of the prepared protective gloves, and the cutting resistance of the protective gloves without the surface optimization treatment on the superfine inorganic powder is relatively easy to be lost.

Claims (6)

1. A preparation method of high-cutting-resistant ultra-high molecular weight polyethylene fibers is characterized by comprising the following steps:
carrying out surface optimization treatment on the superfine inorganic powder to remove corners of sharp superfine inorganic powder particles and simultaneously forming uneven three-dimensional grains on the surface to prepare the superfine inorganic powder additive;
the superfine inorganic powder is a combination of tungsten carbide and ceramic powder, a combination of copper carbide and glass powder, a combination of mineral rock wool powder and boron nitride powder, or a combination of tungsten oxide and glass powder;
the surface optimization treatment method is to adopt hydrofluoric acid to carry out acid etching treatment on the superfine inorganic powder;
mixing and emulsifying the superfine inorganic powder additive, a first solvent and a surfactant to prepare an additive emulsified material;
dispersing the additive emulsion material and ultra-high molecular weight polyethylene powder with the molecular weight of 80-150 ten thousand into a second solvent together to prepare a mixture;
the weight ratio of the ultrahigh molecular weight polyethylene to the superfine inorganic powder additive to the solvent is 10-40: 0.2-1: 100; the mass of the solvent is the sum of the masses of the first solvent and the second solvent;
and (3) blending and extruding the mixture through an extruder, cooling and forming through a coagulating bath to obtain nascent fibers, and extracting, drying and carrying out multi-stage hot drawing on the nascent fibers to obtain the high-cutting-prevention ultrahigh molecular weight polyethylene fibers.
2. The method according to claim 1, wherein the particle size of the ultrafine inorganic powder is 0.1 to 100 μm.
3. The method according to claim 1, wherein the ceramic powder is obtained by crushing waste ceramics; the glass powder is prepared by crushing waste glass; the mineral rock wool powder is prepared by crushing waste mineral rock wool boards.
4. The method as claimed in claim 1, wherein the extruder is a twin-screw extruder, and the temperature of each zone of the twin-screw extruder is controlled at 100 ℃ to 300 ℃.
5. A high cut-resistant ultra-high molecular weight polyethylene fiber prepared by the preparation method of any one of claims 1 to 4.
6. A high cut resistant glove or cut resistant garment comprising a knit from the high cut resistant ultra high molecular weight polyethylene fiber of claim 5.
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