CN107419354A - High cut resistant high-strength high-modulus polyethylene long filament and preparation method thereof - Google Patents
High cut resistant high-strength high-modulus polyethylene long filament and preparation method thereof Download PDFInfo
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- CN107419354A CN107419354A CN201710716613.9A CN201710716613A CN107419354A CN 107419354 A CN107419354 A CN 107419354A CN 201710716613 A CN201710716613 A CN 201710716613A CN 107419354 A CN107419354 A CN 107419354A
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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
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/10—Filtering or de-aerating the spinning solution or melt
- D01D1/106—Filtering
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
-
- 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
Abstract
The invention discloses a kind of high cut resistant high-strength high-modulus polyethylene long filament and preparation method thereof, product is made up of ultra-high molecular weight polyethylene long filament and the short fibre of soft, wear-resistant, and the short fine mass content of soft, wear-resistant is the 20% ~ 40% of ultra-high molecular weight polyethylene matrix.Preparation method include preparing soft, wear-resistant it is short it is fine, prepare ultra-high molecular weight polyethylene spinning solution, prepare short fine pre-dispersed liquid above-mentioned short fine pre-dispersed liquid is added in ultra-high molecular weight polyethylene spinning solution, and superhigh molecular weight polyethylene fibers are further prepared.The ultra-high molecular weight polyethylene long filament of belt cutting-resisting property optimization prepared by the present invention, its intensity is high, modulus is high, remaining oil content is low, and belt cutting-resisting property is stable, soft.
Description
Technical field
The present invention relates to a kind of high-strength polyethylene long filament and preparation method thereof, belong to high-performance fiber technical field.
Background technology
High-tenacity polyethylene fibre is usually through gel spinning legal system by ultra-high molecular weight polyethylene of the intrinsic viscosity more than 18
Into the viscosity average molecular weigh of ultra-high molecular weight polyethylene is typically more than 2,000,000 in fiber so that fiber has more conventional chemical fibre high
Many intensity and moduluss, the product being made from it have excellent pull resistance, impact resistance and wearability, in cable, shellproof
Product, labor protection product etc. have a wide range of applications.The labor protection made of high-tenacity polyethylene fibre directly weaves
Although more conventional chemical fibre is good for the wear-resisting anti-cutting performance of product such as gloves, oversleeve, apron etc., but can not meet higher anti-cutting grade
(such as
4 grades or 5 grades as defined in EN388) requirement.Downstream producer is typically by by high-tenacity polyethylene fibre and glass or steel
Woven product again after the cladding such as silk, to improve the anti-cutting grade of product, but bring quality increase simultaneously, comfortableness reduces etc.
Negative effect.From raw material angle is improved, develop the more preferable high-tenacity polyethylene fibre of anti-cutting performance and be directly used in product
Production, it will help the solution of contradiction.
A kind of preparation method of cut resistant superhigh molecular weight polyethylene fibers is disclosed in patent WO2008/046476, should
Method is that hard mineral fibres is mixed into using decahydronaphthalene as in the spinning solution of solvent, and passes through dry spinning method and spin superelevation point
Sub- weight polyethylene fiber, the more conventional high-tenacity polyethylene fibre of belt cutting-resisting property for obtaining superhigh molecular weight polyethylene fibers have one
Fixed raising, but due to using mineral fiber number, there is also following problem：(1) because the property-modifying additive used is that have one
Determine the short fibre of draw ratio, easily block screen pack in process of production, cause production to be smoothed out；(2) due to using
It is mineral short fibre, it is poor with the adhesion of polyethylene, is not easy to be uniformly dispersed in ultra-high molecular weight polyethylene, causes final
Fiber belt cutting-resisting property it is unstable；(3) feel of the fiber spinned is poor, causes end article feel poor.
A kind of preparation method of cut resistant superhigh molecular weight polyethylene fibers, the party are disclosed in patent CN105734708A
Method is to mix the hard fibres such as ceramic fibre, carbon fiber, silicon carbide whisker with the lysate of ultra-high molecular weight polyethylene
Carry out spinning fibre, in advance stirred hard fibre in high mixer, pre-dispersed, hard fibre has then been carried out in white oil
The dispersion effect tieed up in stoste is improved, but hard fibre and fibrous matrix adhesion are poor, fabric hand is poor obtains shortcoming still
In the presence of.
A kind of filled cut-resistant fiber is disclosed in patent US5976998, the fiber is by fibre-forming polymer and a kind of Mohs
Hard particles of the hardness more than 3 manufacture, and because the hard particles particle diameter used is small, dosage is few, there are the following problems：(1) hard
Grain diameter is small, easily reunites in spinning solution, easily blocks screen pack；(2) hard particles dosage is few, and can not be in fiber sheet
Uniform net distribution is formed in body, it is poor to fiber cutting resistance improvement.
The content of the invention
It is an object of the invention to provide a kind of belt cutting-resisting property optimization high cut resistant high-strength high-modulus polyethylene long filament and
Its preparation method.
The present invention technical solution be：
A kind of high cut resistant high-strength high-modulus polyethylene long filament, it is characterized in that：By ultra-high molecular weight polyethylene long filament and soft
Wear-resisting short fine composition, the short fine mass content of soft, wear-resistant is the 20%~40% of ultra-high molecular weight polyethylene matrix.
A kind of preparation method of high cut resistant high-strength high-modulus polyethylene long filament, it is characterized in that：Comprise the following steps：
(1) the short fibre of soft, wear-resistant is prepared：Using polyethylene and wear-resisting powder as raw material, pass through melt spinning or solution spinning
The polyethylene wearproof long filament of preparation；Above-mentioned polyethylene wearproof long filament is cut to the soft of 50~150um of length using cutting machine
Wear-resisting short fibre；
(2) ultra-high molecular weight polyethylene powder is put into white oil, stirred, obtained ultra-high molecular weight polyethylene and spin
Silk stock solution；
(3) the short fibre of soft, wear-resistant is put into a certain amount of white oil, be uniformly dispersed, short fine pre-dispersed liquid is made；
(4) above-mentioned short fine pre-dispersed liquid is added in ultra-high molecular weight polyethylene spinning solution, stirred under nitrogen protection
Mix uniformly, and feed double screw extruder under nitrogen protection, spinning solution in double screw extruder through dissolving, it is even it is mixed after,
Again through deaeration, filtering, extruded through filament spinning component, frozen glue strand is formed after cooling into cooling liquid bath；
(5) frozen glue strand forms belt cutting-resisting property through pre-stretching, multitple extraction, drying and hot-stretch, then by thermal finalization
The superhigh molecular weight polyethylene fibers of optimization.
Wear-resisting powder described in step (1) in diamond powder, graphene powder, nitrogen silicon oxide compound powder two
Kind or three kinds, wherein at least one is graphene powder.
The inherent viscosity of polyethylene described in step (1) is 1.5 to 7；A diameter of the 5 of the polyethylene wearproof long filament~
15um；Wear-resisting powder particle diameter is 0.80~10um.It is preferred that powder is surface-treated using preceding.The wear-resisting poly- second
Alkene filament linear-density is less than 3.3D, preferably smaller than 2.2D, more preferably less than 1.5D, more preferably less than 1D；Wear-resisting powder in fiber
Content is not less than 10%, preferably not less than 15%, most desirably not less than 20%.
The inherent viscosity of ultra-high molecular weight polyethylene described in step (2) is 18 to 35, and molecular weight distribution is not more than 3,
Bulk density is not more than 0.45g/cm3；The white oil is the solvent of ultra-high molecular weight polyethylene, 40 degree time kinematic viscosity 70~
80cSt；
After the short fibre of soft, wear-resistant is put into a certain amount of white oil in step (3), it is uniformly dispersed using high-shear emulsion machine,
More than the speed of agitator 2500rpm of high-shear emulsion machine, emulsification times are more than 1h.
Double screw extruder described in step (4) is dissolution equipment, 95~125mm of diameter, draw ratio 56~68；The nitrogen
The purity of gas is higher than 99.9%, and moisture content is less than 0.01%；
240~280 DEG C of solution temperature described in step (4)；The mesh of filter screen mesh number 30 of the filter and filament spinning component~
120 mesh；Cooling medium in cooling liquid bath is water or white oil, 10~25 DEG C of medium temperature；Filament spinning component and cooling medium liquid level
Between for nitrogen protection air gap, 10~20 DEG C of air gap temperature, 1~5cm of air gap height.
Multistage pre-stretching stretches for three-level described in step (5), and stretching ratio is respectively 1.2~1.3 times, 3.0~3.5
Again, 1.5~2.0 times, 20~80 DEG C of draft temperature；
Multitple extraction described in step (5) is more than 5 grades, and extractant is agent for carbon hydrogen detergent, dimethylbenzene, dichloromethane, four
One kind in vinyl chloride, 0~70 DEG C of extraction temperature.
Multitple extraction described in step (5) is multiple-grooved series connection, the mode of Ladder Overflow；Multi-stage heat stretches through seven roller drawing-offs
Machine and drawing-off oven heat realize that described multistage for more than 3 grades, stretching ratios at different levels reduce and are all higher than the 1, the 4th grade of stretching step by step
1.0~1.1 times of multiplying power；Draft temperature is 130~150 DEG C, and 1~4 grade of stretching heats up step by step；The thermal finalization is that Minimal Tension heat is fixed
Type, for speed of shaping than being 1.00~1.03,80~130 DEG C of setting temperature, shaping time is not less than 5s.
The present invention is because when preparing the high-strength polyethylene long filament of belt cutting-resisting property optimization, what is added in spinning solution is soft
The short fibre of matter wear resistant polyethylene, its surface energy is low, and itself has good compatibility with white oil and ultra-high molecular weight polyethylene,
It is not easy to reunite during emulsion dispersion in white oil, is readily available finely dispersed pre-dispersed liquid.In addition by the wear-resisting powder group of its parcel
Conjunction is also easier to be uniformly distributed in ultra-high molecular weight polyethylene.Graphene powder has very high ratio surface due to having
Product, as intermediary, wear-resisting powder, other end winding polyethylene molecule long-chain so that wear-resisting powder is with polyethylene are wrapped up in one end
The adhesion of long-chain is stronger, difficult for drop-off, and fiber belt cutting-resisting property is more longlasting.
The ultra-high molecular weight polyethylene long filament that the belt cutting-resisting property prepared using the present invention is optimized, its intensity is high, modulus is high,
Remaining oil content is low, and belt cutting-resisting property is stable, soft.And the preparation method in the invention can effectively avoid nano-powder
Production line screen pack clogging caused by reunion, can be produced steadily in the long term, be advantageous to improve production efficiency.Utilize the fibre
The gloves of braiding are tieed up, in the case where not coating glass or steel wire, cut resistant grade can reaches more than 4 grades of Europe superscript, resistance to cut
Performance is cut to greatly improve.
With reference to embodiment, the invention will be further described.
Embodiment
In following embodiments, the mechanical performance of fiber and anti-cutting performance determine according to following method：
Tensile strength, stretch modulus and the elongation at break of composite fibre are by imported electronic fabric strength tester (Wenzhou Daiei
Textile instrument Co., Ltd) determine and obtain, pretension 10N, press from both sides away from 500mm, draw speed 250mm/min, test environment temperature
25 DEG C, humidity 55%.
Prepared fiber has been woven into gloves according to identical weaving in embodiment, and according to Europe superscript EN388
The qualified inspection center of standard tests the anti-cutting performance of gloves.
Comparative example 1
25kg ultra-high molecular weight polyethylenes powder (IV=20.5) is put into 287.5kg white oils, stirred at 60 DEG C equal
It is even, speed of agitator 70rpm, the uniform spinning solution of acquisition solid content 8%.
Above-mentioned spinning solution dissolves through double screw extruder, fondant filter filtering, by spinning after measuring pump-metered
Component is extruded into spin fluid, and spin fluid is cooled to frozen glue strand after more times of stretchings into coagulating bath.Filtration pore 300
Mesh, 260 DEG C of spinning temperature.
Frozen glue strand obtains as-spun fibre through extracting, after drying, and as-spun fibre passes through three hot-stretch thermal finalization with together with,
Obtain finished product superhigh molecular weight polyethylene fibers.Draw speed 35m/min, 148 DEG C of highest hot-stretch temperature, heat setting temperature
110℃。
Embodiment 1
Using high speed blender, by 100g average grain diameters 1um graphene powder and 1kg average grain diameter 1um bortz powders
Body is dispersed in 5kg polyethylene powders (IV=3), and modified premix is made.Premix obtains single through conventional melt spinning
Silk size 0.56D polyethylene wearproof polyethylene filament.Wear resistant polyethylene long filament cuts into the soft resistance to of 100um length through cutting machine
Grind the short fibre of polyethylene.
20kg ultra-high molecular weight polyethylenes powder (IV=20.5) is put into 262.5kg white oils, stirred at 60 DEG C equal
It is even, speed of agitator 70rpm, obtain ultra-high molecular weight polyethylene spinning solution.Weigh the above-mentioned soft, wear-resistant polyethylene of 5kg it is short it is fine by
Step is put into 50kg white oils, is stirred obtained pre-dispersed liquid using high-shear emulsion machine, and mixer rotating speed 1500rpm~
2500rpm, mixing time are no less than 30min.The wear-resisting short fine pre-dispersed liquid for emulsifying gained is poured into the supra polymer prepared
In weight northylen spinning solution, the modified ultra-high molecular weight polyethylene spinning solution of concentration 8% is obtained.
Above-mentioned spinning solution dissolves through double screw extruder, fondant filter filtering, by spinning after measuring pump-metered
Component is extruded into spin fluid, and spin fluid is cooled to frozen glue strand after more times of stretchings into coagulating bath.Filtration pore 60
Mesh, 260 DEG C of spinning temperature.
Frozen glue strand obtains as-spun fibre through extracting, after drying, and as-spun fibre passes through three hot-stretch thermal finalization with together with,
Obtain the superhigh molecular weight polyethylene fibers of belt cutting-resisting property optimization.Draw speed 35m/min, 148 DEG C of highest hot-stretch temperature,
110 DEG C of heat setting temperature.
Embodiment 2
Embodiment 1 is repeated, difference is, prepares the wear-resisting powder used in wear-resisting short fibre and is combined as 100g Graphene powders
Body and 1kg nitrogen silicon oxide compound powders.
Embodiment 3
Embodiment 2 is repeated, difference is, when preparing modified ultra-high molecular weight polyethylene spinning solution, wear-resisting short fibre
Adding proportion rise to 40% by 20% in embodiment 2 (i.e. by 5kg it is wear-resisting it is short it is fine made of 55kg white oil pre-dispersed liquids add
Enter into 101.25kg spinning solutions made of 7.5kg ultra-high molecular weight polyethylene powders).
Comparative example 2
Embodiment 1 is repeated, difference is, the wear-resisting powder prepared used in wear-resisting short fibre is the pure of average grain diameter 1um
Diamond powder.
Note：Above-mentioned fiber is 400D/120F specifications.
Claims (8)
1. a kind of high cut resistant high-strength high-modulus polyethylene long filament, it is characterized in that：By ultra-high molecular weight polyethylene long filament and soft resistance to
Short fine composition is ground, the short fine mass content of soft, wear-resistant is the 20% ~ 40% of ultra-high molecular weight polyethylene matrix.
2. a kind of preparation method of high cut resistant high-strength high-modulus polyethylene long filament, it is characterized in that：Comprise the following steps：
（1）Prepare the short fibre of soft, wear-resistant：Using polyethylene and wear-resisting powder as raw material, prepared by melt spinning or solution spinning
Polyethylene wearproof long filament；The soft, wear-resistant that above-mentioned polyethylene wearproof long filament is cut into 50 ~ 150um of length using cutting machine is short
It is fine；
（2）Ultra-high molecular weight polyethylene powder is put into white oil, stirred, it is former to obtain ultra-high molecular weight polyethylene spinning
Liquid；
（3）The short fibre of soft, wear-resistant is put into a certain amount of white oil, is uniformly dispersed, short fine pre-dispersed liquid is made；
（4）Above-mentioned short fine pre-dispersed liquid is added in ultra-high molecular weight polyethylene spinning solution, stirring is equal under nitrogen protection
It is even, and feed double screw extruder under nitrogen protection, spinning solution in double screw extruder through dissolving, it is even it is mixed after, then pass through
Deaeration, filtering, are extruded through filament spinning component, and frozen glue strand is formed after cooling into cooling liquid bath；
（5）Frozen glue strand forms belt cutting-resisting property optimization through pre-stretching, multitple extraction, drying and hot-stretch, then by thermal finalization
Superhigh molecular weight polyethylene fibers.
3. the preparation method of high cut resistant high-strength high-modulus polyethylene long filament according to claim 2, it is characterized in that：Step
（1）Described in two or three in diamond powder, graphene powder, nitrogen silicon oxide compound powder of wear-resisting powder, its
In at least one kind be graphene powder.
4. the preparation method of high cut resistant high-strength high-modulus polyethylene long filament according to claim 3, it is characterized in that：Step
（1）Described in polyethylene inherent viscosity be 1.5 to 7；A diameter of 5 ~ 15um of the polyethylene wearproof long filament；Wear-resisting powder
Particle diameter is 0.80 ~ 10um.
5. the preparation method of the high cut resistant high-strength high-modulus polyethylene long filament according to claim 2,3 or 4, it is characterized in that：
Step（2）Described in ultra-high molecular weight polyethylene inherent viscosity be 18 to 35, molecular weight distribution be not more than 3, bulk density
No more than 0.45g/cm3；The white oil is the solvent of ultra-high molecular weight polyethylene, and 40 degree are descended 70 ~ 80cSt of kinematic viscosity；
Step（3）After the middle short fibre of soft, wear-resistant is put into a certain amount of white oil, it is uniformly dispersed using high-shear emulsion machine, height is cut
Cut more than the speed of agitator 2500rpm of mulser, emulsification times are more than 1h.
6. the preparation method of the high cut resistant high-strength high-modulus polyethylene long filament according to claim 2,3 or 4, it is characterized in that：
Step（4）Described in double screw extruder be dissolution equipment, 95 ~ 125mm of diameter, draw ratio 56 ~ 68；The purity of the nitrogen is high
In 99.9%, moisture content is less than 0.01%；
Step（4）Described in 240 ~ 280 DEG C of solution temperature；The mesh of the mesh of filter screen mesh number 30 of the filter and filament spinning component ~ 120；
Cooling medium in cooling liquid bath is water or white oil, 10 ~ 25 DEG C of medium temperature；It is nitrogen between filament spinning component and cooling medium liquid level
The air gap of protection, 10 ~ 20 DEG C of air gap temperature, 1 ~ 5cm of air gap height.
7. the preparation method of the high cut resistant high-strength high-modulus polyethylene long filament according to claim 2,3 or 4, it is characterized in that：
Step（5）Described in multistage pre-stretching stretched for three-level, stretching ratio is respectively 1.2 ~ 1.3 times, 3.0 ~ 3.5 times, 1.5 ~ 2.0
Times, 20 ~ 80 DEG C of draft temperature；
Step（5）Described in multitple extraction be more than 5 grades, extractant be agent for carbon hydrogen detergent, dimethylbenzene, dichloromethane, four chloroethenes
One kind in alkene, 0 ~ 70 DEG C of extraction temperature.
8. the preparation method of the high cut resistant high-strength high-modulus polyethylene long filament according to claim 2,3 or 4, it is characterized in that：
Step（5）Described in multitple extraction be multiple-grooved series connection, the mode of Ladder Overflow；Multi-stage heat stretches through seven roller drafting machines and drawing-off
Oven heat realizes, it is described it is multistage be more than 3 grades, stretching ratios at different levels reduce step by step and be all higher than the 1, the 4th grade of stretching ratio 1.0 ~
1.1 again；Draft temperature is 130 ~ 150 DEG C, and 1 ~ 4 grade of stretching heats up step by step；The thermal finalization is Minimal Tension thermal finalization, fast ratio of shaping
For 1.00 ~ 1.03,80 ~ 130 DEG C of setting temperature, shaping time is not less than 5s.
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| CN110144635A (en) * | 2019-05-16 | 2019-08-20 | 山东莱威新材料有限公司 | The method and products thereof of preparation ultra high molecular weight polyethylene fiber is extracted with tetrachloro-ethylene |
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| CN113529200A (en) * | 2018-01-31 | 2021-10-22 | 湖南中泰特种装备有限责任公司 | Preparation method of anti-cutting polyethylene fiber |
| CN109913974A (en) * | 2019-02-25 | 2019-06-21 | 长青藤高性能纤维材料有限公司 | A kind of high cut resistant ultra-high molecular weight polyethylene composite fibre and preparation method thereof with conducting function |
| CN109913974B (en) * | 2019-02-25 | 2021-08-31 | 长青藤高性能纤维材料有限公司 | High-cutting-resistance ultrahigh molecular weight polyethylene composite fiber with conductive function and preparation method thereof |
| CN110205695A (en) * | 2019-05-08 | 2019-09-06 | 星宇安防科技股份有限公司 | A kind of high anti-cutting ultra high molecular weight polyethylene fiber and preparation method thereof |
| CN110144635A (en) * | 2019-05-16 | 2019-08-20 | 山东莱威新材料有限公司 | The method and products thereof of preparation ultra high molecular weight polyethylene fiber is extracted with tetrachloro-ethylene |
| CN113026135A (en) * | 2021-03-15 | 2021-06-25 | 浙江千禧龙纤特种纤维股份有限公司 | Ultra-high molecular weight polyethylene fiber anti-cutting bag, anti-cutting bag material and preparation method thereof |
| CN113026135B (en) * | 2021-03-15 | 2022-06-07 | 浙江千禧龙纤特种纤维股份有限公司 | Ultra-high molecular weight polyethylene fiber anti-cutting bag, anti-cutting bag material and preparation method thereof |
| CN113622037A (en) * | 2021-08-25 | 2021-11-09 | 上海化工研究院有限公司 | Ultra-high molecular weight polyethylene fiber and preparation method and application thereof |
| CN115182060A (en) * | 2022-07-29 | 2022-10-14 | 上海化工研究院有限公司 | Ultra-high molecular weight polyethylene fiber and preparation method and application thereof |
| CN115182060B (en) * | 2022-07-29 | 2024-01-26 | 上海化工研究院有限公司 | Ultrahigh molecular weight polyethylene fiber and preparation method and application thereof |
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Application publication date: 20171201 |