CN112144131B - Method for removing residual solvent of high-performance polyethylene fiber - Google Patents
Method for removing residual solvent of high-performance polyethylene fiber Download PDFInfo
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- CN112144131B CN112144131B CN201910560430.1A CN201910560430A CN112144131B CN 112144131 B CN112144131 B CN 112144131B CN 201910560430 A CN201910560430 A CN 201910560430A CN 112144131 B CN112144131 B CN 112144131B
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- performance 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
- 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
- D01D10/06—Washing or drying
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
- D02J1/225—Mechanical characteristics of stretching apparatus
Abstract
The invention provides a method for further removing residual low-concentration solvent in fiber, which is used for carrying out secondary treatment on finished fiber, adopts a novel constant-temperature drying and drafting hot box, increases primary drafting treatment, and further removes the low-concentration solvent contained in the finished fiber, so that the residual amount of the solvent in the fiber reaches the application standard of national medical instruments.
Description
Technical Field
The present invention belongs to the field of polymer material. In particular to a method for removing residual solvent of high-performance polyethylene dry spinning fiber products.
Background
The dry spinning technology for ultrahigh molecular weight polyethylene fiber uses decalin, paraffin oil and white oil as solvent system to produce high-strength and high-modulus polyethylene fiber mainly used in national defense, military industry and other fields.
In recent years, the application fields are gradually widened, and the application fields are extended to equipment linings, equipment, fabrics and the like. However, in the aspects of medical equipment, surgical suture, fixed supports, sports fitness equipment and the like, the low-concentration solvent residue contained in the fiber can not reach the specified application standard (less than or equal to 20 ppm), so that the application field of the fiber is limited.
Due to poor temperature resistance of high-performance polyethylene fibers, if the high-performance polyethylene fibers stay in a drawing hot box for too long, the performance and quality of the fibers are reduced, and broken filaments and broken ends occur.
Disclosure of Invention
The invention mainly aims to solve the problem of low-concentration solvent residue in the conventional high-performance polyethylene fiber dry spinning fiber product and broaden the application of the high-performance polyethylene fiber dry spinning fiber product in the aspects of medical instruments, sports equipment and the like.
According to the invention, the drafting machines with the compression rollers are arranged at the two ends of the constant-temperature drying and drafting hot box to perform drying and drafting process adjustment, so that the residual quantity of the organic solvent in the fiber is removed to the maximum extent under the condition of not reducing the performance of the fiber. Solves the problem of residual solvent in polyethylene fiber and widens the application field.
The main technical scheme of the invention is as follows: a method for removing residual solvent from high-performance polyethylene fiber features that the drafting machines with press rollers are arranged at both ends of the constant-temp drying-drafting hot box to dry the high-performance polyethylene dry-spinning fiber in the constant-temp drying-drafting hot box at constant temp to remove residual solvent.
Generally, finished fibers are placed on a yarn frame (1), tows pass through a yarn guide frame, the finished fibers are flatly laid on a seven-roller drawing machine (2), and are sent into a constant-temperature drying and drawing hot box (3) through the seven-roller drawing machine (2) to be dried at constant temperature, residual solvents in the fibers are volatilized, the tows migrate at low speed in the constant-temperature drying and drawing hot box, and dried fiber products are sent into a low-magnification winding machine (4) through the seven-roller drawing machine (2) and the yarn guide frame to be wound and molded.
The method for removing the residual solvent of the high-performance polyethylene fiber adopts a fiber product formed by a dry spinning process, and the used solvent is a high-volatility organic solvent which is convenient to remove at constant temperature.
The method for removing the residual solvent of the high-performance polyethylene fiber adopts a constant-temperature high-dryness drafting hot box, and the internal temperature control precision of the hot box is-0.1 ℃. The electric heating material is heated by tungsten wires, and the internal wind speed is 0.1-1 m/s.
The method for removing the residual solvent of the high-performance polyethylene fiber is characterized in that a primary constant-temperature drying drafting line is added on the basis of the original drafting process, and the difference is that the operation parameter is low-speed drafting winding, the drafting multiplying factor is less than 2 times, and the drafting speed is 1-6 m/min.
The method for removing the residual solvent of the high-performance polyethylene fiber aims at further removing the residual solvent with low concentration, and is different from the existing method for removing the solvent with high concentration.
The specific scheme of the invention is as follows: placing a high-performance polyethylene dry spinning fiber finished product on a silk frame (1), sending the filament bundle into a constant-temperature drying and drawing hot box (3) through a silk guide frame and a seven-roller drawing machine 1 (2) for constant-temperature drying, wherein the initial drawing speed is 1-3m/min, volatilizing residual solvent in the fiber, and transferring the filament bundle in the constant-temperature drying and drawing hot box (3) at a low speed at the temperature of 140-; the dried fiber product is sent to a low-magnification winding machine (5) through a seven-roller drafting machine 2 (4) and a yarn guide frame to be wound and molded at a winding speed of 1-6 m/min; the drafting multiplying factor is 1-2 times.
Preferably, the heating material adopted by the constant-temperature drying and drawing hot box is an electric tungsten wire, and the temperature control precision is-0.1 ℃. The circulating wind speed in the constant-temperature drying and drawing hot box is 0.1-1 m/s.
The residual solvent is one of decahydronaphthalene, tetrahydronaphthalene, toluene and xylene.
The mass percentage of solvent residue in the fiber product is 1-10%, preferably 1-3%.
The residual amount of the fiber solvent of the dry spinning fiber product treated by the technology is 1-20 ppm.
The drafting rate is 1-1.5 times, the initial drafting speed is 1-2m/min, the winding speed is 1-3m/min, and the temperature control range is 142-.
The drafting rate is 1.2 times, the initial drafting speed is 1.5m/min, the winding speed is 1.8m/min, and the temperature control range is 145 ℃.
The invention has the advantages of
The invention further refines the finished fiber, greatly increases the retention time of the fiber in the constant-temperature drying hot box, and is convenient for the residual solvent in the fiber to be heated and quickly volatilized. Due to poor temperature resistance of high-performance polyethylene fibers, if the high-performance polyethylene fibers stay in a constant-temperature high-dryness drafting hot box for too long time, the performance and quality of the fibers are reduced, and broken filaments and broken ends occur.
The method can effectively remove the residual solvent in the fiber, and the content of the solvent in the fiber is far lower than 20 ppm.
The fiber produced by the method has uniform fiber number and excellent performance, and is particularly suitable for the application of high-performance polyethylene fiber dry spinning fiber products in the aspects of medical devices, sports equipment and the like.
Drawings
FIG. 1 is a schematic flow chart of a method for removing residual solvent from high-performance polyethylene fibers according to an embodiment of the present invention.
In the figure, 1-wire frame; 2-seven-roller drafting machine 1; 3-drying and drawing the hot box at constant temperature; 4-seven-roller drafting machine 2; and 5, a winding machine.
Detailed Description
The present invention will be described in detail below with reference to examples and the accompanying drawings.
The following examples refer to the attached figure 1 for a schematic flow chart of the method for removing the residual solvent of the high-performance polyethylene fiber. Finished fibers are placed on a yarn frame (1), the tows pass through a yarn guide frame, the finished fibers are flatly laid on a seven-roller drawing machine (2), and are sent into a constant-temperature drying and drawing hot box (3) through the seven-roller drawing machine (2) to be dried at constant temperature, residual solvents in the fibers are volatilized, the tows migrate at low speed in the constant-temperature drying and drawing hot box, and dried fiber products are sent into a low-magnification winding machine (4) through the seven-roller drawing machine (2) and the yarn guide frame to be wound and molded.
In the embodiment, the constant-temperature high-dryness drawing hot box is adopted, the control precision of the internal temperature is-0.1 ℃, the electric heating material is heated by tungsten wires, and the internal air speed is 0.1-1 m/s.
Example 1
The high-performance polyethylene fiber dry spinning fiber product is adopted, the temperature of a constant-temperature drying drawing hot box is 145 ℃, the air speed inside the drawing hot box is 0.5m/s, the initial seven-roller speed is 1m/s, the solvent residue in the fiber is 1% (mass percentage), the drawing multiplying power is 1.0, 1.1, 1.2, 1.3, 1.4 and 1.5 times respectively, and the solvent residue in the fiber is tested.
TABLE 1 relationship of draw ratio to residual solvent removal from fiber
Example 2
The high-performance polyethylene fiber dry spinning fiber product is adopted, the air speed inside a drawing hot box is 0.5m/s, the initial seven-roller speed is 1m/s, the solvent residue in the fiber is 1% (mass percentage), the drawing multiplying power is 1.2 times, the temperature of a constant-temperature drying drawing hot box is respectively 140 ℃, 142 ℃, 144, 145, 146 and 148 ℃, and the solvent residue in the fiber is tested.
TABLE 2 relationship of the drying temperature of the draw oven to the removal of residual solvent from the fiber
Example 3
The high-performance polyethylene fiber dry spinning fiber product is adopted, the air speed inside a drawing hot box is 0.5m/s, the solvent residual quantity in the fiber is 1% (mass percentage), the drawing multiplying power is 1.2 times, the temperature of a constant-temperature drying drawing hot box is 145 ℃, the initial seven-roller speed is 0.5, 1.0, 1.5, 2.0, 2.5 and 3m/s respectively, and the solvent residual quantity in the fiber is tested.
TABLE 3 relationship of initial draw speed to residual solvent removal from fiber
Example 4
The high-performance polyethylene fiber dry spinning fiber product is adopted, the air speed in a drawing hot box is 0.5m/s, the solvent residue in the fiber is respectively 1%, 1.5%, 1.8%, 2.0%, 2.5% and 3.0% (mass percentage), the drawing multiplying power is 1.2 times, the temperature of a constant-temperature drying drawing hot box is respectively 145 ℃, the initial seven-roller speed is respectively 1.5m/s, and the solvent residue in the fiber is tested.
TABLE 4 relationship between the residual amount of solvent in the fibers and the removal of residual solvent from the fibers
The above examples clearly show that the solvent residue of the fiber treated by the method has obvious effect, and the solvent residue in the fiber is lower than 20ppm under the condition of ensuring the performance and quality of the fiber, thereby having important significance for the expansion of the subsequent fiber market.
Claims (9)
1. A method for removing residual solvent of high-performance polyethylene fiber is characterized in that drafting machines with compression rollers are arranged at two ends of a constant-temperature drying and drafting hot box, finished high-performance polyethylene dry-spinning fiber is sent into the constant-temperature drying and drafting hot box for constant-temperature drying, and the residual solvent is removed, and the method specifically comprises the steps of placing the finished high-performance polyethylene dry-spinning fiber on a silk frame (1), sending the silk bundle into a constant-temperature drying and drafting hot box (3) for constant-temperature drying through a silk guide frame and a seven-roller drafting machine 1 (2), wherein the initial drafting speed is 1-3m/min, volatilizing the residual solvent in the fiber, and transferring the silk bundle at low speed in the constant-temperature drying and drafting hot box (3) at the temperature of 140-; the dried fiber product is sent to a low-magnification winding machine (5) through a seven-roller drafting machine 2 (4) and a yarn guide frame to be wound and molded at a winding speed of 1-6 m/min; the drafting multiplying factor is 1-2 times.
2. The method for removing the residual solvent from the high-performance polyethylene fiber as claimed in claim 1, wherein the heating material adopted by the constant-temperature drying and drawing hot box is an electric tungsten filament, and the temperature control precision is-0.1 ℃ to 0.1 ℃.
3. The method for removing the residual solvent from the high-performance polyethylene fiber according to claim 1, wherein the circulating air speed inside the constant-temperature drying and drawing hot box is 0.1-1 m/s.
4. The method of claim 1, wherein the solvent is one of decalin, tetralin, toluene and xylene.
5. The method of claim 1 wherein the solvent residue in the fiber product is 1-10% by mass.
6. The method of claim 1 wherein the solvent residue in the fiber product is 1-3% by mass.
7. The method for removing the residual solvent from high-performance polyethylene fiber according to claim 1, wherein the fiber product is dry-spun, and the residual solvent content of the treated fiber is 1-20 ppm.
8. The method for removing the solvent remained in the high-performance polyethylene fiber as claimed in claim 1, wherein the drawing rate is 1-1.5 times, the initial drawing speed is 1-2m/min, the winding speed is 1-3m/min, and the temperature control range is 142 ℃ to 148 ℃.
9. The method for removing the residual solvent from the high-performance polyethylene fiber according to claim 8, wherein the drawing speed is 1.2 times, the initial drawing speed is 1.5m/min, the winding speed is 1.8m/min, and the temperature control range is 145 ℃.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03119105A (en) * | 1989-07-13 | 1991-05-21 | Akzo Nv | Preparation of polyethylene filament |
| CN101903573A (en) * | 2007-12-17 | 2010-12-01 | 帝斯曼知识产权资产管理有限公司 | Process for spinning UHMWPE, UHMWPE multifilament yarns produced thereof and products comprising said yarns |
| CN102304784A (en) * | 2006-04-07 | 2012-01-04 | 帝斯曼知识产权资产管理有限公司 | High-strength polyethylene fiber and method for producing the same |
| CN102505159A (en) * | 2011-10-28 | 2012-06-20 | 北京威亚高性能纤维有限公司 | Creep-resistant ultra-high molecular weight polyethylene fiber and preparation method and application thereof |
| CN105002578A (en) * | 2015-05-19 | 2015-10-28 | 上海化工研究院 | Method for separating solid phases from solvent during ultrahigh molecular weight polyethylene dry spinning process |
| CN106555240A (en) * | 2016-11-23 | 2017-04-05 | 中国纺织科学研究院 | A kind of preparation method and fiber of high-performance polyethylene fibres |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101917164B1 (en) * | 2013-10-30 | 2018-11-09 | 에스케이이노베이션 주식회사 | Method of fabricating thermal conductive polymer |
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- 2019-06-26 CN CN201910560430.1A patent/CN112144131B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03119105A (en) * | 1989-07-13 | 1991-05-21 | Akzo Nv | Preparation of polyethylene filament |
| CN102304784A (en) * | 2006-04-07 | 2012-01-04 | 帝斯曼知识产权资产管理有限公司 | High-strength polyethylene fiber and method for producing the same |
| CN101903573A (en) * | 2007-12-17 | 2010-12-01 | 帝斯曼知识产权资产管理有限公司 | Process for spinning UHMWPE, UHMWPE multifilament yarns produced thereof and products comprising said yarns |
| CN102505159A (en) * | 2011-10-28 | 2012-06-20 | 北京威亚高性能纤维有限公司 | Creep-resistant ultra-high molecular weight polyethylene fiber and preparation method and application thereof |
| CN105002578A (en) * | 2015-05-19 | 2015-10-28 | 上海化工研究院 | Method for separating solid phases from solvent during ultrahigh molecular weight polyethylene dry spinning process |
| CN106555240A (en) * | 2016-11-23 | 2017-04-05 | 中国纺织科学研究院 | A kind of preparation method and fiber of high-performance polyethylene fibres |
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Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: SINOPEC NANJING CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Address before: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699 Patentee before: SINOPEC NANJING CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Patentee before: CHINA PETROLEUM & CHEMICAL Corp. |