CN112226860A - Method for crimping ultrahigh molecular weight high-strength high-modulus polyethylene fiber - Google Patents
Method for crimping ultrahigh molecular weight high-strength high-modulus polyethylene fiber Download PDFInfo
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- CN112226860A CN112226860A CN202011087531.0A CN202011087531A CN112226860A CN 112226860 A CN112226860 A CN 112226860A CN 202011087531 A CN202011087531 A CN 202011087531A CN 112226860 A CN112226860 A CN 112226860A
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- 238000000034 method Methods 0.000 title claims abstract description 71
- 239000000835 fiber Substances 0.000 title claims abstract description 68
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 title claims abstract description 59
- 238000002788 crimping Methods 0.000 title claims description 34
- 230000001681 protective effect Effects 0.000 claims abstract description 50
- 238000005520 cutting process Methods 0.000 claims abstract description 40
- 238000007493 shaping process Methods 0.000 claims abstract description 34
- 230000003811 curling process Effects 0.000 claims abstract description 14
- 230000005674 electromagnetic induction Effects 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000011084 recovery Methods 0.000 claims description 9
- 238000003892 spreading Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 229920006052 Chinlon® Polymers 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- -1 polypropylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920004933 Terylene® Polymers 0.000 claims 1
- 239000005020 polyethylene terephthalate Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000009987 spinning Methods 0.000 abstract description 5
- 229920000728 polyester Polymers 0.000 description 6
- 238000010030 laminating Methods 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 229920006253 high performance fiber Polymers 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/20—Combinations of two or more of the above-mentioned operations or devices; After-treatments for fixing crimp or curl
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/004—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by heating fibres, filaments, yarns or threads so as to create a temperature gradient across their diameter, thereby imparting them latent asymmetrical shrinkage properties
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/10—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using knife edges, e.g. heated knife edges, for edge crimping
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The invention relates to a method for curling ultrahigh molecular weight, high strength and high modulus polyethylene fibers, which comprises an oiling process, a yarn folding process, a preheating process, a curling process, a shaping process and a cutting process, wherein straight yarns of the ultrahigh molecular weight, high strength and high modulus polyethylene fibers are processed into curled yarns with permanent two-dimensional or three-dimensional structures, so that the processability of subsequent links such as spinning, non-woven and the like is greatly improved, and the curling effect is improved to the maximum extent while the damage of the curling process to the fibers is reduced by creatively adding protective yarn sheets and carrying out sectional and partitioned preheating.
Description
Technical Field
The invention relates to the technical field of processing of ultrahigh molecular weight, high strength and high modulus polyethylene fibers, in particular to a crimping method of ultrahigh molecular weight, high strength and high modulus polyethylene fibers.
Background
The ultrahigh molecular weight high-strength high-modulus polyethylene fiber, the carbon fiber and the aramid fiber are called three high-performance fiber materials, and have the characteristics of high strength, high modulus, high orientation degree, high crystallinity and the like, and although the characteristics ensure the excellent performance of the ultrahigh molecular weight high-strength high-modulus polyethylene fiber, the traditional crimping method is difficult to effectively crimp the ultrahigh molecular weight high-strength high-modulus polyethylene fiber, so that the processing and application of the ultrahigh molecular weight high-strength high-modulus polyethylene fiber in the fields of spinning, non-weaving and the like are limited.
At present, the crimping process method of the ultrahigh molecular weight high-strength high-modulus polyethylene fiber is to bundle the fiber into filament pieces, the filament pieces enter a crimping box body after preheating, because the ultrahigh molecular weight high-strength high-modulus polyethylene fiber has poor temperature resistance, the preheating temperature can not be higher than 70 ℃ generally, because the fiber has high strength, large modulus and small elongation at break, after the conventional crimping, cutting and other procedures, the crimping number, the crimping rate are low, the crimping recovery rate is lower than the use requirement, and the crimping effect needs to be improved greatly.
Disclosure of Invention
Technical problem to be solved
At present, the method for curling the ultrahigh molecular weight high-strength high-modulus polyethylene fiber cannot realize effective curling, and the curling number, the curling rate and the curling recovery rate are not ideal, so that the method limits the processing and application of the ultrahigh molecular weight high-strength high-modulus polyethylene fiber in the fields of spinning, non-woven and the like. The invention aims to overcome the defects of the prior art and improve a simple, convenient and efficient method for crimping ultrahigh molecular weight, high strength and high modulus polyethylene fibers with continuously controllable process.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a method for crimping ultra-high molecular weight, high strength and high modulus polyethylene fibers comprises the following steps:
(1) oiling;
(2) a silk folding procedure;
(3) a preheating procedure;
(4) a curling process;
(5) a shaping procedure;
(6) a cutting step;
the straight filament of the ultra-high molecular weight high-strength high-modulus polyethylene fiber is processed into a coiled filament with a permanent two-dimensional or three-dimensional structure.
Furthermore, the step (1) adopts No. 30-100 white oil, and the oil applying amount is controlled to be 0.1-3.0%.
Further, in the step (2), three silk sheets with the width of 10-300mm are adopted and are stacked into one piece through a silk stacking machine.
Further, in the step (2), the ultrahigh molecular weight, high strength and high modulus polyethylene fiber sheets are used as an intermediate layer, the upper side and the lower side of the intermediate layer are symmetrically provided with protective fiber sheets, the protective fiber sheets are made of a material with an initial modulus lower than that of the ultrahigh molecular weight, high strength and high modulus polyethylene fibers, the width of the protective fiber sheets is the same as that of the intermediate layer, and the protective fiber sheets are made of one material of polyester, chinlon or polypropylene.
Further, the thickness of the protective silk slice is 0.2-5 mm.
Further, the preheating temperature in the step (3) is divided into two sections, wherein the first section is hot air convection preheating, the preheating length is 0.2-1m, the preheating time is 2-10s, and the preheating temperature is 50-80 ℃; the second stage is electromagnetic induction heating, the preheating length is 0.5-1m, the preheating time is 5-10s, the electromagnetic induction heating power is 500-10000W, and the electromagnetic induction heating heats the ultrahigh molecular weight high-strength high-modulus polyethylene fiber slice containing the white oil to 80-110 ℃.
Further, the curling main pressure in the step (4) is 0.2-0.8MPa, and the curling back pressure is 0.1-0.5 MPa.
Further, in the step (5), the silk slices are firstly sent into a damp-heat shaping furnace through a silk spreading machine, the shaping temperature is 70-100 ℃, the relative humidity in the furnace is 80-95%, and the shaping time is 30-120 s.
Further, the crimped silk pieces are divided into two paths by the silk guide device in the step (6), the upper protective silk pieces and the lower protective silk pieces are cut off by a disc type cutting machine, the crimped ultrahigh molecular weight high-strength high-modulus polyethylene fiber in the middle is cut off by a high-temperature hot cutting mode, and the temperature of the cutting edge of the cutter is 160-.
Furthermore, the number of curls of the curly yarn is 6-18 per 25 mm, the crimp rate is 10% -40%, and the crimp recovery rate is 8-30%.
(III) advantageous effects
The present invention is directed to overcoming the above problems of the prior art and providing a method for crimping ultra-high molecular weight, high strength and high modulus polyethylene fibers.
Compared with the prior art, the implementation of the invention can process the ultra-high molecular weight high-strength high-modulus polyethylene fiber straight yarn into the crimped yarn with a permanent two-dimensional or three-dimensional structure, greatly improves the processability of subsequent links such as spinning, non-woven and the like, reduces the damage of crimping processing on the fiber and simultaneously improves the crimping effect to the maximum extent by creatively adding the protective yarn sheet and preheating in a sectional and partitioned manner.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A method for crimping ultra-high molecular weight, high strength and high modulus polyethylene fibers comprises the following steps:
(1) oiling: no. 48 white oil is adopted in the oiling process, and the oiling amount is controlled to be 0.10%;
(2) a silk folding procedure: the method comprises the following steps of (1) positioning ultrahigh molecular weight high-strength high-modulus polyethylene fiber sheets in a middle layer, preparing polyester into protective yarn sheets with the same width, positioning the protective yarn sheets on the upper side and the lower side of the middle layer, wherein the thickness of each protective yarn sheet is 3mm, the widths of the middle layer and the protective yarn sheets are both 80mm, and overlapping the middle layer and the protective yarn sheets into a sheet by a yarn overlapping machine;
(3) a preheating procedure: the preheating temperature is divided into two sections, wherein the first section is hot air convection preheating, the preheating length is 0.4m, the preheating time is 5s, and the preheating temperature is 60 ℃; the second stage is electromagnetic induction heating, the preheating length is 0.4m, the preheating time is 5s, the electromagnetic induction heating power is 600W, and the ultrahigh molecular weight high-strength high-modulus polyethylene fiber sheet containing white oil is heated to 85 ℃ through electromagnetic induction heating;
(4) a curling process: the curling main pressure in the curling process is 0.7MPa, and the curling back pressure is 0.15 MPa;
(5) shaping: firstly, conveying the silk slices into a damp-heat shaping furnace through a silk spreading machine, wherein the shaping temperature is 70 ℃, the relative humidity in the furnace is 95%, and the shaping time is 30 s;
(6) a cutting step: when cutting off, the curled silk pieces are divided into two paths by the silk guide device, the upper protective silk piece and the lower protective silk piece are cut off by the disc type cutting machine, the curled ultrahigh molecular weight high-strength high-modulus polyethylene fiber in the middle is cut off by a high-temperature hot cutting mode, and the temperature of the cutting edge of the cutter is 180 ℃.
The ultra-high molecular weight, high strength and high modulus polyethylene fiber processed by the procedures of oiling, doubling, preheating, curling, shaping and cutting has the curling number of 22/25 mm, the curling rate of 27 percent and the curling recovery rate of 17 percent.
Example 2
A method for crimping ultra-high molecular weight, high strength and high modulus polyethylene fibers comprises the following steps:
(1) oiling: the oiling process adopts No. 50 white oil, and the amount of the oil is controlled to be 0.20 percent;
(2) a silk folding procedure: the method comprises the following steps of (1) positioning ultrahigh molecular weight high-strength high-modulus polyethylene fiber sheets in a middle layer, preparing polyester into protective yarn sheets with the same width, positioning the protective yarn sheets on the upper side and the lower side of the middle layer, wherein the thickness of each protective yarn sheet is 2mm, the widths of the middle layer and the protective yarn sheets are both 100mm, and overlapping the middle layer and the protective yarn sheets into a sheet by a yarn overlapping machine;
(3) a preheating procedure: the preheating temperature is divided into two sections, wherein the first section is hot air convection preheating, the preheating length is 0.5m, the preheating time is 6s, and the preheating temperature is 70 ℃; the second stage is electromagnetic induction heating, the preheating length is 0.5m, the preheating time is 6s, the electromagnetic induction heating power is 800W, and the ultrahigh molecular weight high-strength high-modulus polyethylene fiber sheet containing white oil is heated to 90 ℃ through electromagnetic induction heating;
(4) a curling process: the curling main pressure in the curling process is 0.5MPa, and the curling back pressure is 0.20 MPa;
(5) shaping: firstly, conveying the silk slices into a damp-heat shaping furnace through a silk spreading machine, wherein the shaping temperature is 70 ℃, the relative humidity in the furnace is 90%, and the shaping time is 60 s;
(6) a cutting step: when cutting off, the curled silk pieces are divided into two paths by the silk guide device, the upper protective silk piece and the lower protective silk piece are cut off by the disc type cutting machine, the curled ultrahigh molecular weight high-strength high-modulus polyethylene fiber in the middle is cut off by a high-temperature hot cutting mode, and the temperature of the cutting edge of the cutter is 180 ℃.
The ultra-high molecular weight, high strength and high modulus polyethylene fiber processed by the procedures of oiling, yarn folding, preheating, curling, shaping and cutting has the curling number of 20/25 mm, the curling rate of 25 percent and the curling recovery rate of 15 percent.
Example 3
A method for crimping ultra-high molecular weight, high strength and high modulus polyethylene fibers comprises the following steps:
(1) oiling: no. 64 white oil is adopted in the oiling process, and the oiling amount is controlled to be 0.23%;
(2) a silk folding procedure: the method comprises the following steps of (1) positioning ultrahigh molecular weight high-strength high-modulus polyethylene fiber sheets in a middle layer, preparing polyester into protective yarn sheets with the same width on the upper side and the lower side of the middle layer, wherein the thickness of each protective yarn sheet is 1mm, the widths of the middle layer and the protective yarn sheets are both 110mm, and overlapping the middle layer and the protective yarn sheets into one sheet by a yarn overlapping machine;
(3) a preheating procedure: the preheating temperature is divided into two sections, wherein the first section is hot air convection preheating, the preheating length is 0.55 m, the preheating time is 7s, and the preheating temperature is 72 ℃; the second section is electromagnetic induction heating, the preheating length is 0.55 m, the preheating time is 7s, the electromagnetic induction heating power is 850W, and the ultrahigh molecular weight high-strength high-modulus polyethylene fiber sheet containing white oil is heated to 94 ℃ through electromagnetic induction heating;
(4) a curling process: the curling main pressure in the curling process is 0.45MPa, and the curling back pressure is 0.24 MPa;
(5) shaping: firstly, feeding the silk slices into a damp-heat shaping furnace through a silk spreading machine, wherein the shaping temperature is 75 ℃, the relative humidity in the furnace is 87%, and the shaping time is 70 s;
(6) a cutting step: when cutting off, the curled silk pieces are divided into two paths by the silk guide device, the upper protective silk piece and the lower protective silk piece are cut off by the disc type cutting machine, the curled ultrahigh molecular weight high-strength high-modulus polyethylene fiber in the middle is cut off by a high-temperature hot cutting mode, and the temperature of the cutting edge of the cutter is 180 ℃.
The ultra-high molecular weight, high strength and high modulus polyethylene fiber processed by the procedures of oiling, doubling, preheating, curling, shaping and cutting has the curling number of 19/25 mm, the curling rate of 23 percent and the curling recovery rate of 13 percent.
Example 4
A method for crimping ultra-high molecular weight, high strength and high modulus polyethylene fibers comprises the following steps:
(1) oiling: no. 70 white oil is adopted in the oiling process, and the oiling amount is controlled to be 0.25%;
(2) a silk folding procedure: the method comprises the following steps of (1) positioning ultrahigh molecular weight high-strength high-modulus polyethylene fiber sheets in a middle layer, preparing polyester into protective yarn sheets with the same width, positioning the protective yarn sheets on the upper side and the lower side of the middle layer, wherein the thickness of each protective yarn sheet is 0.5mm, the widths of the middle layer and the protective yarn sheets are both 120mm, and laminating the middle layer and the protective yarn sheets into a sheet by a yarn laminating machine;
(3) a preheating procedure: the preheating temperature is divided into two sections, wherein the first section is hot air convection preheating, the preheating length is 0.6m, the preheating time is 8s, and the preheating temperature is 75 ℃; the second stage is electromagnetic induction heating, the preheating length is 0.6m, the preheating time is 8s, the electromagnetic induction heating power is 900W, and the ultrahigh molecular weight high-strength high-modulus polyethylene fiber sheet containing white oil is heated to 95 ℃ through electromagnetic induction heating;
(4) a curling process: the curling main pressure in the curling process is 0.4MPa, and the curling back pressure is 0.25 MPa;
(5) shaping: firstly, conveying the silk slices into a damp-heat shaping furnace through a silk spreading machine, wherein the shaping temperature is 75 ℃, the relative humidity in the furnace is 85%, and the shaping time is 80 s;
(6) a cutting step: when cutting off, the curled silk pieces are divided into two paths by the silk guide device, the upper protective silk piece and the lower protective silk piece are cut off by the disc type cutting machine, the curled ultrahigh molecular weight high-strength high-modulus polyethylene fiber in the middle is cut off by a high-temperature hot cutting mode, and the temperature of the cutting edge of the cutter is 180 ℃.
The ultra-high molecular weight, high strength and high modulus polyethylene fiber processed by the procedures of oiling, yarn folding, preheating, curling, shaping and cutting has the curling number of 18/25 mm, the curling rate of 20 percent and the curling recovery rate of 10 percent.
Example 5
A method for crimping ultra-high molecular weight, high strength and high modulus polyethylene fibers comprises the following steps:
(1) oiling: no. 100 white oil is adopted in the oiling process, and the oiling amount is controlled to be 0.5%;
(2) a silk folding procedure: the method comprises the following steps of (1) positioning ultrahigh molecular weight high-strength high-modulus polyethylene fiber sheets in a middle layer, preparing polyester into protective yarn sheets with the same width, positioning the protective yarn sheets on the upper side and the lower side of the middle layer, wherein the thickness of each protective yarn sheet is 0.2mm, the widths of the middle layer and the protective yarn sheets are both 150mm, and laminating the middle layer and the protective yarn sheets into a sheet by a yarn laminating machine;
(3) a preheating procedure: the preheating temperature is divided into two sections, wherein the first section is hot air convection preheating, the preheating length is 0.8m, the preheating time is 10s, and the preheating temperature is 80 ℃; the second stage is electromagnetic induction heating, the preheating length is 0.8m, the preheating time is 10s, the electromagnetic induction heating power is 1200W, and the ultrahigh molecular weight high-strength high-modulus polyethylene fiber sheet containing white oil is heated to 105 ℃ through electromagnetic induction heating;
(4) a curling process: the curling main pressure in the curling process is 0.6MPa, and the curling back pressure is 0.30 MPa;
(5) shaping: firstly, conveying the silk slices into a damp-heat shaping furnace through a silk spreading machine, wherein the shaping temperature is 85 ℃, the relative humidity in the furnace is 80%, and the shaping time is 90 s;
(6) a cutting step: when cutting off, the curled silk pieces are divided into two paths by the silk guide device, the upper protective silk piece and the lower protective silk piece are cut off by the disc type cutting machine, the curled ultrahigh molecular weight high-strength high-modulus polyethylene fiber in the middle is cut off by a high-temperature hot cutting mode, and the temperature of the cutting edge of the cutter is 180 ℃.
The ultra-high molecular weight high-strength high-modulus polyethylene fiber processed by the procedures of oiling, yarn folding, preheating, curling, shaping and cutting has the curling number of 16/25 mm, the curling rate of 18 percent and the curling recovery rate of 8 percent.
It can be seen from the examples 1 to 5 that the invention processes the ultra-high molecular weight, high strength and high modulus polyethylene fiber straight yarn into the crimped yarn with a permanent two-dimensional or three-dimensional structure, greatly improves the processability of subsequent links such as spinning and non-woven, reduces the damage of the crimping process to the fiber and maximally improves the crimping effect by creatively adding protective yarn sheets and sectionally preheating.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A method for crimping ultra-high molecular weight, high strength, high modulus polyethylene fibers, said method comprising the steps of:
(1) oiling;
(2) a silk folding procedure;
(3) a preheating procedure;
(4) a curling process;
(5) a shaping procedure;
(6) a cutting step;
the straight filament of the ultra-high molecular weight high-strength high-modulus polyethylene fiber is processed into a coiled filament with a permanent two-dimensional or three-dimensional structure.
2. The method of claim 1, wherein the crimping process comprises: in the step (1), No. 30-100 white oil is adopted, and the amount of the white oil is controlled to be 0.1-3.0%.
3. The method of claim 1, wherein the crimping process comprises: and (2) adopting three silk sheets with the width of 10-300mm, and overlapping the silk sheets into one piece by a silk overlapping machine.
4. A method of crimping an ultra-high molecular weight, high strength, high modulus polyethylene fiber according to claim 3, wherein: and (2) taking the ultrahigh molecular weight high-strength high-modulus polyethylene fiber sheets as an intermediate layer, wherein the upper side and the lower side of the intermediate layer are symmetrically provided with protective yarn sheets, the protective yarn sheets are made of a material with an initial modulus lower than that of the ultrahigh molecular weight high-strength high-modulus polyethylene fibers, the width of the protective yarn sheets is the same as that of the intermediate layer, and the protective yarn sheets are made of one material of terylene, chinlon or polypropylene.
5. The method of claim 4, wherein the step of crimping the ultra-high molecular weight, high strength and high modulus polyethylene fiber comprises: the thickness of the protective silk piece is 0.2-5 mm.
6. The method of claim 1, wherein the crimping process comprises: the preheating temperature in the step (3) is divided into two sections, wherein the first section is hot air convection preheating, the preheating length is 0.2-1m, the preheating time is 2-10s, and the preheating temperature is 50-80 ℃; the second stage is electromagnetic induction heating, the preheating length is 0.5-1m, the preheating time is 5-10s, the electromagnetic induction heating power is 500-10000W, and the electromagnetic induction heating heats the ultrahigh molecular weight high-strength high-modulus polyethylene fiber slice containing the white oil to 80-110 ℃.
7. The method of claim 1, wherein the crimping process comprises: the crimping main pressure in the step (4) is 0.2-0.8MPa, and the crimping back pressure is 0.1-0.5 MPa.
8. The method of claim 1, wherein the crimping process comprises: and (5) firstly, the silk slices are conveyed into a damp-heat shaping furnace through a silk spreading machine, the shaping temperature is 70-100 ℃, the relative humidity in the furnace is 80-95%, and the shaping time is 30-120 s.
9. The method for crimping ultra-high molecular weight, high strength and high modulus polyethylene fiber as claimed in claim 1, wherein the step (6) comprises dividing the crimped filament into two parts by a filament guiding device, cutting the upper and lower protective filament parts by a disc cutter, and cutting the ultra-high molecular weight, high strength and high modulus polyethylene fiber crimped in the middle by high temperature hot cutting at a temperature of 160-.
10. The ultra-high molecular weight, high strength and high modulus polyethylene fiber crimped yarn of claim 1, wherein the number of crimps in the crimped yarn is 6-18 per 25 mm, the crimp ratio is 10% -40%, and the crimp recovery is 8-30%.
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| CN202881534U (en) * | 2012-10-19 | 2013-04-17 | 宁波大发化纤有限公司 | Novel simple combining and doubling device |
| CN103255578A (en) * | 2013-05-30 | 2013-08-21 | 山东爱地高分子材料有限公司 | Ultra-high molecular weight polyethylene anti-cutting cloth and production method thereof |
| CN203403175U (en) * | 2013-08-02 | 2014-01-22 | 山东英利实业有限公司 | Two-dimensional hollow short fiber production device |
| CN106283246A (en) * | 2015-06-04 | 2017-01-04 | 中国石化仪征化纤有限责任公司 | A kind of ultra-high molecular weight polyethylene chopped fiber and preparation method thereof |
| CN108456937A (en) * | 2018-04-25 | 2018-08-28 | 山东齐鲁化纺有限公司 | A kind of improved felt foundation medium-length fibre manufacturing technique |
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