CN109487349A - A kind of preparation method of ultra-high molecular weight polyethylene monofilaments - Google Patents
A kind of preparation method of ultra-high molecular weight polyethylene monofilaments Download PDFInfo
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- CN109487349A CN109487349A CN201811063782.8A CN201811063782A CN109487349A CN 109487349 A CN109487349 A CN 109487349A CN 201811063782 A CN201811063782 A CN 201811063782A CN 109487349 A CN109487349 A CN 109487349A
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- high molecular
- weight polyethylene
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—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
- D01D1/00—Treatment of filament-forming or like material
- D01D1/04—Melting filament-forming substances
-
- 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
- D01D1/06—Feeding liquid to the spinning head
- D01D1/09—Control of pressure, temperature or feeding rate
-
- 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
- D01D5/12—Stretch-spinning methods
- D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
-
- 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
-
- 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
Abstract
The invention discloses a kind of preparation method of ultra-high molecular weight polyethylene monofilaments, preparation step is as follows: using through the molten ultra-high molecular weight polyethylene compound material for pinching processing, carrying out abundant melting, mixing to compound material through special screw extruder, and squeeze out conveying；The pressure of molten system is further improved through booster pump, melt quantitative is pressed into spinning die head simultaneously or spinning manifold squeezes out spinneret, nascent monofilament is obtained after water-bath or oil bath or air bath are cooling, gained is come into being monofilament doffing, again through more times of hot-stretch, directly continuously nascent monofilament can also be heat-treated after water-bath drawing-off, multistage hot-rolling drawing-off and hot-air stretch, oil to obtain high-strength high-modulus polyethylene monofilament.The present invention well solved intermolecular chimeric rearrangement is difficult, macromolecular entanglements seriously caused by melt body mobility, the problem of uniformity difference, gained filament strength height, uniformity are good, simple production process, high-efficient, environmental-friendly.
Description
Technical field
The present invention relates to polymer fiber material technical fields, specifically, being related to a kind of ultra-high molecular weight polyethylene list
The preparation method of silk.
Background technique
Since the later period eighties in last century, DSM N. V., Holland succeeded in developing ultra high molecular weight polyethylene fiber, with height
Intensity, high-modulus and excellent shock resistance, wear-resisting property and weather resistance become after carbon fiber, aramid fiber (Kevlar)
Third generation high-performance fiber after fiber.In recent years, the application prospect of ultra high molecular weight polyethylene fiber is paid close attention to by people,
It is widely used in the fields such as agricultural machinery, personal protection, deep-sea fishing, military affairs, aerospace.
The research of UHMW~PE fiber in China starts from the 1980s, successively by Donghua University, (china textile is big
Learn), China Textile Academy, some R&D institutions such as Beijing Synthetic research institute start to carry out relevant exploration and grind
Study carefully, and achieve a series of great theoretical breakthroughs, breaks through key production technology within 1999.UHMW~PE fiber is usually to adopt
Be prepared with gel spinning~overpull stretching process, as patent CN101886298 use weight average molecular weight for 100~7,000,000
Polyethylene powders are configured to the spinning solution of 10~25wt% through white oil dissolution, are 5.5~8mm's in 250~330 DEG C of via hole diameters
Round spinneret orifice sprays, then warp~10 DEG C are cooling to~1 DEG C of coagulating bath, are then extracted, dried, in 100~150 DEG C of temperature
UHMWPE monofilament is made in the lower hot-stretch for carrying out 2~4 grades, 30~50 times of total draw ratio.It is described in patent CN99111581
Super high molecular weight condensate, is dissolved in corresponding solvent first, obtains by a kind of production technology of high-strength high-modulus polyethylene fiber
It to the solution of lower macromolecular entanglements, is quenched to form gel spun fiber through spinning, then through techniques such as extraction, drying and multistage stretchings,
The polyethylene fibre of high-strength and high-modulus is made.Above-mentioned gel spinning technique, in order to be made high-strength with suppleness joint
High modulus fiber, it is necessary to use super high molecular weight weak solution and ultra-drawing.To reducing macromolecular end number, defect is reduced,
It reduces macromolecular entanglements and macromolecular is made sufficiently to form the extended chain crystallization being orientated along draw direction.Even if using good solvent such as ten
Hydrogen naphthalene, solution concentration is still not high enough, causes production cost high, and (is extracted with the second solvent of a large amount of energy or low boiling point
Take agent) remove the first solvent.It no matter is all problematic for production efficiency, production cost or environmental protection.
It (is 10 since the viscosity of UHMWPE is high9Pa.S), it is always that UHMWPE carries out melt spinning that mobile performance is very poor
A big obstacle, in order to improve the mobility of UHMWPE, intercalation town up to et al. propose it is a kind of by organosilicon, liquid crystal polymer (for
Modifying agent) and UHMW~PE blend composition (patent: CN01130158.9, patent: CN01130161.9), Lai Tigao UHMW~PE's
The method of rheological property, UHMW~PE content are 88~94%, organosilicon 3~7%, liquid crystal polymer 2~5%, stearic acid salt
0.2~2%, antioxidant 0.1~1%.Liu Tinghua et al., which is proposed with medium molecular weight polyvinyl, improves UHMW~PE flowing
Property, the polyethylene of molecular weight 300,000~400,000 is added in UHMW~PE of molecular quantum 1,500,000, while appropriate nucleation is added
Agent and in-lubricant, material ratio 70:30:0.3, resulting material can be used for being molded extrusion (Chinese Plastics, 15,4,2001,39
~43).As the polymer modification material of melt spinning, not only there is preferable mobile performance easy to process, also system be required to have
Uniformly, structure orderly especially requires the contact for reaching molecular level between raw material particle macromolecule and its between composite modified system,
Be conducive to macromolecular chain diffusion simultaneously, reach and macromolecular entanglements degree is effectively reduced.Polymeric system after wanting abundant Processing for removing
The morphosis of interior raw material grain remembers (Polymer.44,2003,1613~1618), and it is good that this requires modified body and UHMW~PE to have
Good compatibility, goes out and the generation without apparent layering and sliding phenomenon during post-tensioning in material processing, melting agent, thus
The adverse effect to finished fiber mechanical property is reduced to the full extent.
Therefore, the technology for how solving technological deficiency in the prior art as those skilled in the art's urgent need to resolve is asked
Topic.
Summary of the invention
In view of this, the present invention, which is squeezed out and melted using the twin-screw mixing of independent development, pinches compound preparation UHMWPE compound material
Technology (patent: 201410498371.7), initially remember, and it is big to be conducive to UHMWPE by the structure that can effectively eliminate UHMWPE raw material grain
The chain of molecule extends, through UHMWPE macromolecular is chimeric with the chain of modified system molecule and rearrangement, obtained UHMWPE expect with it is compound
Modified system it is compatible it is molten pinch compound material, it is obtained it is molten pinch compound material and can be widely applied to injection molding material and extruded stock, be processed into
Any moulding especially has preferable melting spinnability, further can carry out spinning on single (double) screw spinning unit, make
Standby high-strength and high-modulus UHMWPE fibrous material.
To achieve the goals above, the present invention adopts the following technical scheme:
The present invention provides a kind of methods of ultra-high molecular weight polyethylene melt spinning, including following preparation step:
A, will be input to through the molten ultra-high molecular weight polyethylene compound material for pinching processing can generate the special of 20~60MPa pressure
Screw extruder carries out abundant melting, mixing to compound material under high pressure or super-pressure, and squeezes out conveying；
B, the pressure (40-100MPa) for above-mentioned fused materials being further increased molten system through booster pump again is simultaneously right simultaneously
Melt is exported through booster pump, quantitative fused materials to be pressed into spinning die head or spinning manifold squeezes out spinneret, through water-bath or oil bath or
Nascent monofilament is obtained after air bath is cooling；
C, above-mentioned nascent monofilament is carried out to multistage hot-stretch in hot-stretch case, or directly continuously by nascent monofilament through water-bath
(oil bath, air bath) drawing-off, multistage hot-rolling drawing-off and hot-air are heat-treated after stretching, oil to obtain high-strength high-modulus polyethylene list
Silk.
Preferably, the molten ultra-high molecular weight polyethylene mixture for pinching processing of warp in step a be containing weight average molecular weight 80~
The composite modified material of 5000000 polyethylene 85~98%；High pressure or the operating temperature of super-pressure extruder are 160~320 DEG C.
Preferably, the high pressure or the screw extruder of super-pressure of can produce is to bore double or same twin-screw extrusion in the same direction
Machine.
Preferably, it is 160~320 DEG C that compression temperature is further melted in step b, and booster pump output temperature is 200~320
DEG C, spinning body temperature is 225~325 DEG C, and cooling temperature is 30~120 DEG C.
Preferably, the series of multistage stretching is 1~6 grade in hot-stretch case in step c, and total draw ratio is 5~30 times, is drawn
Stretching temperature is 55~105 DEG C, and heat setting temperature is 130~150 DEG C.
Preferably, be 0.05~5mm up to diameter after oiling, intensity is 7.5~18cN/dtex, elongation be 8~
40% ultra-high molecular weight polyethylene monofilaments.
It can be seen via above technical scheme that compared with prior art, the present invention has the beneficial effect that:
The present invention uses the UHMWPE compound material that processing is pinched through melting, and can be generated the special Screw Extrusion of high pressure or super-pressure
And further booster pump is pressurized and quantitative output, and it is serious to have well solved intermolecular chimeric rearrangement difficulty, macromolecular entanglements
The problem of caused melt body mobility, uniformity difference, gained filament strength is high, uniformity is good.It can continuous-stable realization industrialization
Production, production process are also precipitated without other volatizable materials without using organic solvent, simple production process, high-efficient, environment
It is friendly.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is one-step method melt spinning schematic diagram；
Fig. 2 is two step method melt spinning schematic diagram；
Wherein, in figure,
1- hopper, 2- driving machine, 3- bore bis- (with double) double screw extruders, 4- Melt Pump, 5- spinning die head (spinning in the same direction
Cabinet), 6- blowing duct, five roller of the first drawing-off of 7-, 8- level-one hot-stretch case, five roller of the second drawing-off of 9-, 10- second level hot-stretch
Case, five roller of 11- third drawing-off, 12- thermal finalization, 13- oils, 15- is wound, five roller of 16- drawing-off, 17- thread supplying machine.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to description of the invention attached drawing 1-2, it is easy to understand technical solution of the present invention.
Wherein two step method are as follows: use the ultra-high molecular weight polyethylene (weight average molecular weight for 80~5,000,000) for pinching processing through molten
Compound material fills compound material under high pressure or super-pressure through that can generate the special screw extruder of 20~60MPa pressure
Divide melting, mixing, and squeezes out conveying；In the pressure (40~100MPa) for further improving molten system through booster pump, simultaneously
Melt quantitative is pressed into spinning die head or spinning manifold squeezes out spinneret, is obtained after water-bath or oil bath or air bath are cooling nascent single
Silk, gained are come into being monofilament doffing, then through more times of hot-stretch；
One-step method are as follows: directly continuously that nascent monofilament is empty through water-bath (oil bath, air bath) drawing-off, multistage hot-rolling drawing-off and heat
Gas is heat-treated after stretching, oils to obtain high-strength high-modulus polyethylene monofilament.
Embodiment 1
The super-pressure that the composite modified material for the polyethylene 98% for being 1,000,000 containing weight average molecular weight is added to 30MPa is same
It into cone in pairs screw extruder, is sufficiently mixed, melting, the operating temperature of double screw extruder is 230 DEG C.It again will be above-mentioned
Fused materials further increase the pressure of molten system to 55MPa through booster pump, and operating temperature is 250 DEG C, and simultaneously to melt
Metering output is carried out, it is quantitative that fused materials are pressed into spinning die head or spinning manifold extrusion spinneret, spinning body temperature 265
℃.Nascent monofilament is obtained through 80 DEG C of hot baths are cooling again；Then in 90 DEG C of progress hot-air secondary drawings, draw ratio 10,
Finally obtain diameter by 130 DEG C of thermal finalizations, the processes such as oil, wind as 0.12mm, tensile strength 8.1cN/dtex, elongation
15% ultra-high molecular weight polyethylene monofilaments.
Embodiment 2
The super-pressure that the composite modified material for the polyethylene 94% for being 2,000,000 containing weight average molecular weight is added to 35MPa is same
It in screw extruder in pairs, is sufficiently mixed, melting, the operating temperature of double screw extruder is 240 DEG C.It again will be above-mentioned
Fused materials further increase the pressure of molten system to 60MPa through booster pump, and operating temperature is 255 DEG C, and simultaneously to melt
Metering output is carried out, it is quantitative that fused materials are pressed into spinning die head or spinning manifold extrusion spinneret, spinning body temperature 268
℃.Nascent monofilament is obtained through 120 DEG C of hot oil baths are cooling again；Then in 90 DEG C of progress hot-air three-level stretchings, draw ratio 15,
Finally obtain diameter by 130 DEG C of thermal finalizations, the processes such as oil, wind as 0.25mm, tensile strength 8.7cN/dtex, elongation
17.6% ultra-high molecular weight polyethylene monofilaments.
Embodiment 3
The super-pressure that the composite modified material for the polyethylene 92% for being 2,500,000 containing weight average molecular weight is added to 42MPa is same
It into cone in pairs screw extruder, is sufficiently mixed, melting, the operating temperature of double screw extruder is 255 DEG C.It again will be above-mentioned
Fused materials further increase the pressure of molten system to 65MPa through booster pump, and operating temperature is 260 DEG C, and simultaneously to melt
Metering output is carried out, it is quantitative that fused materials are pressed into spinning die head or spinning manifold extrusion spinneret, spinning body temperature 270
℃.Nascent monofilament is obtained through 90 DEG C of hot baths are cooling again；Then in 100 DEG C of progress hot-air level Four stretchings, draw ratio 20,
Finally obtain diameter by 150 DEG C of thermal finalizations, the processes such as oil, wind as 0.30mm, tensile strength 9.2cN/dtex, elongation
20% ultra-high molecular weight polyethylene monofilaments.
Embodiment 4
The super-pressure that the composite modified material for the polyethylene 89% for being 3,000,000 containing weight average molecular weight is added to 45MPa is same
It into cone in pairs screw extruder, is sufficiently mixed, melting, the operating temperature of double screw extruder is 260 DEG C.It again will be above-mentioned
Fused materials further increase the pressure of molten system to 69MPa through booster pump, and operating temperature is 275 DEG C, and simultaneously to melt
Metering output is carried out, it is quantitative that fused materials are pressed into spinning die head or spinning manifold extrusion spinneret, spinning body temperature 272
DEG C, nascent monofilament then is obtained through 90 DEG C of hot-air coolings, winding, then carry out two step method stretching, stretching series is three-level, is stretched
Multiple is 15, finally obtains diameter by 140 DEG C of thermal finalizations, the processes such as oil, wind as 0.42mm, tensile strength 9.7cN/
Dtex, the ultra-high molecular weight polyethylene monofilaments of elongation 20%.
Embodiment 5
The super-pressure that the composite modified material for the polyethylene 87% for being 5,000,000 containing weight average molecular weight is added to 45MPa is same
It into cone in pairs screw extruder, is sufficiently mixed, melting, the operating temperature of double screw extruder is 280 DEG C.It again will be above-mentioned
Fused materials further increase the pressure of molten system to 75MPa through booster pump, and operating temperature is 280 DEG C, and simultaneously to melt
Metering output is carried out, it is quantitative that fused materials are pressed into spinning die head or spinning manifold extrusion spinneret, spinning body temperature 278
℃.Nascent monofilament is obtained through 120 DEG C of hot oil baths are cooling again；Then in 90 DEG C of progress hot-air level Four stretchings, draw ratio 25,
Finally obtain diameter by 130 DEG C of thermal finalizations, the processes such as oil, wind as 0.5mm, tensile strength 11.2cN/dtex, elongation
20% ultra-high molecular weight polyethylene monofilaments.
Referring to the various embodiments described above of the present invention it is found that the present invention uses the UHMWPE compound material for pinching processing through melting, through that can produce
The special Screw Extrusion and the pressurization of further booster pump of raw high pressure or super-pressure and quantitative output, have well solved intermolecular
It is fitted into melt body mobility, the problem of uniformity difference caused by resetting difficult, macromolecular entanglements seriously, gained filament strength is high, equal
Even property is good.Compared with prior art, the present invention has substantive distinguishing features outstanding and significant progress.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
1. a kind of preparation method of ultra-high molecular weight polyethylene monofilaments, which is characterized in that including following preparation step:
A, it will be added in screw extruder through the molten ultra-high molecular weight polyethylene compound material for pinching processing, compound material melted
Refining, mixing, and squeeze out conveying；
B, fused materials in step a are improved into the pressure of molten system through booster pump again and melt are exported through booster pump simultaneously,
It is quantitative that fused materials are pressed into spinning die head or spinning manifold extrusion spinneret, it is obtained just after water-bath or oil bath or air bath are cooling
Raw monofilament；
C, the nascent monofilament for preparing step b carries out multistage hot-stretch in hot-stretch case, or directly continuously passes through nascent monofilament
Water-bath or oil bath or air bath drawing-off, multistage hot-rolling drawing-off and hot-air be heat-treated after stretching, it is poly- to oil to obtain high-strength and high-modulus
Ethylene monofilament.
2. a kind of preparation method of ultra-high molecular weight polyethylene monofilaments according to claim 1, which is characterized in that the step
The pressure that screw extruder in rapid a generates is 20~60MPa.
3. a kind of preparation method of ultra-high molecular weight polyethylene monofilaments according to claim 1, which is characterized in that the step
The pressure of molten system is 40~100MPa in rapid b.
4. a kind of preparation method of ultra-high molecular weight polyethylene monofilaments according to claim 1, which is characterized in that the step
Screw extruder is to bore double screw extruder or same double screw extruder in the same direction in rapid a.
5. a kind of preparation method of ultra-high molecular weight polyethylene monofilaments according to claim 1-4, feature exist
In the ultra-high molecular weight polyethylene mixture compound after melting and pinching processing in the step a is containing weight average molecular weight 80~500
The composite modified material of ten thousand polyethylene 85~98%；The operating temperature for squeezing out conveying is 160~320 DEG C.
6. a kind of preparation method of ultra-high molecular weight polyethylene monofilaments according to claim 5, which is characterized in that the step
Melting compression temperature is 160~320 DEG C in rapid b, and booster pump output temperature is 200~320 DEG C, spinning body temperature is 225~
325 DEG C, cooling temperature is 30~90 DEG C.
7. a kind of preparation method of ultra-high molecular weight polyethylene monofilaments according to claim 5, which is characterized in that step c
The series of multistage stretching is 1~6 grade in middle hot-stretch case, and total draw ratio is 5~30 times, and draft temperature is 55~105 DEG C, heat
Setting temperature is 130~150 DEG C.
8. a kind of preparation method of ultra-high molecular weight polyethylene monofilaments according to claim 1, which is characterized in that through oiling
Afterwards up to the ultra-high molecular weight polyethylene that diameter is 0.05~5mm, intensity is 7.5~18cN/dtex, elongation is 8~40%
Monofilament.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111041586A (en) * | 2019-12-28 | 2020-04-21 | 宜禾股份有限公司 | Preparation process of bulletproof high-strength polyethylene fiber applied to special clothing |
| CN111876834A (en) * | 2020-07-21 | 2020-11-03 | 陆超杰 | Composite fiber processing method |
| CN114134583A (en) * | 2021-12-28 | 2022-03-04 | 南通新帝克单丝科技股份有限公司 | High-dpf polyphenylene sulfide long fiber and production method thereof |
| CN114318561A (en) * | 2021-12-14 | 2022-04-12 | 哈工大泰州创新科技研究院有限公司 | Continuous drafting device for producing ultra-high molecular weight polyethylene fibers |
| CN115110163A (en) * | 2022-06-23 | 2022-09-27 | 东华大学 | Melt spinning preparation method of medium-molecular-weight and medium-strength polyethylene fibers, woven product and application |
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