CN111893591A - Preparation method of PTFE (polytetrafluoroethylene) long fibers - Google Patents
Preparation method of PTFE (polytetrafluoroethylene) long fibers Download PDFInfo
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- CN111893591A CN111893591A CN202010799916.3A CN202010799916A CN111893591A CN 111893591 A CN111893591 A CN 111893591A CN 202010799916 A CN202010799916 A CN 202010799916A CN 111893591 A CN111893591 A CN 111893591A
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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
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/08—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons
- D01F6/12—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons from polymers of fluorinated hydrocarbons
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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
- D01D10/02—Heat treatment
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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
- D01D5/12—Stretch-spinning methods
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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
- D01D5/42—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments
- D01D5/426—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments by cutting films
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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
- D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/32—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising halogenated hydrocarbons as the major constituent
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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
- D01F6/48—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 polymers of halogenated hydrocarbons
Abstract
The invention discloses a preparation method of PTFE long fiber, which comprises the steps of mixing two raw materials with different grain diameters with kerosene according to a proportion, and adding the mixture into a stirrer for stirring; and then melting the stirred raw materials at 300-500 ℃, pouring the melted raw materials into a mold, cooling the raw materials into the mold, demolding, calendering the demolded raw materials in a calendering machine at a calendering temperature of 80-120 ℃ and a calendering pressure of 8-11 MPa, cutting the calendered raw materials, stretching the cut raw materials at a temperature of 180-240 ℃ and a tensile strength of 30-38 MPa, and finally shaping the stretched raw materials at a temperature of 180-240 ℃. The long fiber produced by the invention has higher fiber strength and high uniformity.
Description
Technical Field
The invention relates to the technical field of plastics, in particular to a preparation method of PTFE long fibers.
Background
Polytetrafluoroethylene (PTFE), also known as plastic king, is a high molecular compound polymerized from tetrafluoroethylene, and has the characteristics of chemical stability, corrosion resistance, sealing property, high lubrication non-adhesiveness, electrical insulation property, aging resistance and the like. The composite material is widely applied to daily life, such as manufacturing pipelines, containers and the like.
The existing PTFE long fiber is low in fiber strength of long fibers produced by a chemical fiber spinning method, and the existing PTFE long fiber is broken when the existing PTFE long fiber is produced by a cutting and stretching method, so that a working procedure of connecting the broken ends by workers is needed, the working efficiency is low, and the uniformity of the fibers produced by the method is low.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a preparation method of PTFE long fibers, and the long fibers produced by the method have high fiber strength and high uniformity.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a preparation method of PTFE long fibers comprises the following specific steps:
the first step is as follows: mixing and stirring, namely mixing a plurality of raw materials with different particle sizes with kerosene according to a proportion, and then adding the mixture into a stirrer for stirring;
the second step is that: melting and pouring the stirred raw materials into a mold, wherein the raw materials are melted at high temperature and then poured into the mold;
the third step: cooling and demolding, namely cooling and demolding the raw materials fed into the mold;
the fourth step: rolling and cutting, namely rolling the demolded raw material on a rolling machine, and cutting the rolled raw material;
the fifth step: heating and stretching, namely heating and stretching the cut raw materials;
and a sixth step: and (4) heating and shaping, namely heating and shaping the stretched raw materials.
As a further scheme of the invention, the first-step raw materials are at least two, and the particle sizes of the two raw materials are 135-215 μm and 225-345 μm respectively.
As a further scheme of the invention, the ratio of the two raw materials is 1: 1.5-1: 3.
As a further scheme of the invention, the stirrer alternately stirs clockwise and anticlockwise, and the stirring time is 10-30 min.
As a further scheme of the invention, the high temperature of the second step is 300-500 ℃.
According to a further scheme of the invention, the calendering temperature of the fourth step of calendering machine is 80-120 ℃, and the calendering pressure is 8-11 MPa.
According to a further scheme of the invention, the heating temperature in the fifth step is 180-240 ℃, and the tensile strength is 30-38 MPa.
In a further aspect of the present invention, the draw ratio is 6 to 8 times.
As a further scheme of the invention, the sixth step is carried out at the heating temperature of 180-240 ℃ and the setting time of 25-45 min.
The invention has the advantages and positive effects that: because the technical scheme is adopted, the yield of the PTFE long fiber is high, and the produced long fiber has higher fiber strength and high uniformity.
Drawings
FIG. 1 is a flow chart of a method for producing a PTFE filament of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the preparation method of the PTFE long fiber of the present invention comprises the following specific steps:
the first step is as follows: mixing and stirring, namely mixing a plurality of raw materials with different particle sizes with kerosene according to a proportion, and then adding the mixture into a stirrer for stirring;
the second step is that: melting and pouring the stirred raw materials into a mold, wherein the raw materials are melted at high temperature and then poured into the mold;
the third step: cooling and demolding, namely cooling and demolding the raw materials fed into the mold;
the fourth step: rolling and cutting, namely rolling the demolded raw material on a rolling machine, and cutting the rolled raw material;
the fifth step: heating and stretching, namely heating and stretching the cut raw materials;
and a sixth step: and (4) heating and shaping, namely heating and shaping the stretched raw materials.
Preferably, the first step raw materials are at least two, the particle sizes of the two raw materials are 135-215 μm and 225-345 μm respectively, the ratio of the two raw materials is 1: 1.5-1: 3, the stirrer alternately stirs clockwise and anticlockwise, and the stirring time is 10-30 min.
Preferably, the high temperature of the second step is 300-500 ℃.
Preferably, the calendering temperature of the fourth calendering machine is 80-120 ℃, and the calendering pressure is 8-11 MPa.
Preferably, the heating temperature in the fifth step is 180-240 ℃, and the tensile strength is 30-38 MPa.
Preferably, the stretching ratio is 6 to 8 times.
Preferably, the heating temperature in the sixth step is 180-240 ℃, and the setting time is 25-45 min.
Table 1 shows the strength comparison (cN/dtex) of the long fiber produced by the present invention and the chemical fiber spinning method
In conclusion, the strength of the long fiber produced by the method is higher than that of the long fiber produced by the chemical fiber spinning method.
Table 2 shows the uniformity of the long fibers produced by the cutting and drawing method according to the present invention
In conclusion, the evenness of the long fiber produced by the method is greater than that of the long fiber produced by the cutting and stretching method.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many variations or modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.
Claims (9)
1. A preparation method of PTFE long fiber is characterized by comprising the following steps: the method comprises the following specific steps:
the first step is as follows: mixing and stirring, namely mixing a plurality of raw materials with different particle sizes with kerosene according to a proportion, and then adding the mixture into a stirrer for stirring;
the second step is that: melting and pouring the stirred raw materials into a mold, wherein the raw materials are melted at high temperature and then poured into the mold;
the third step: cooling and demolding, namely cooling and demolding the raw materials fed into the mold;
the fourth step: rolling and cutting, namely rolling the demolded raw material on a rolling machine, and cutting the rolled raw material;
the fifth step: heating and stretching, namely heating and stretching the cut raw materials;
and a sixth step: and (4) heating and shaping, namely heating and shaping the stretched raw materials.
2. The method for preparing PTFE filament as set forth in claim 1, wherein: the particle sizes of the two raw materials are 135-215 μm and 225-345 μm respectively.
3. The method for preparing PTFE filament as set forth in claim 2, wherein: the ratio of the two raw materials is 1: 1.5-1: 3.
4. The method for preparing PTFE filament as set forth in claim 1, wherein: the stirrer alternately stirs clockwise and anticlockwise, and the stirring time is 10-30 min.
5. The method for preparing PTFE filament as set forth in claim 1, wherein: the high temperature of the second step is 300-500 ℃.
6. The method for preparing PTFE filament as set forth in claim 1, wherein: and the calendering temperature of the fourth step of calendering machine is 80-120 ℃, and the calendering pressure is 8-11 MPa.
7. The method for preparing PTFE filament as set forth in claim 1, wherein: and in the fifth step, the heating temperature is 180-240 ℃, and the tensile strength is 30-38 MPa.
8. The method for preparing PTFE filament as set forth in claim 7, wherein: the stretching ratio is 6-8 times.
9. The method for preparing a PTFE long fiber according to claim 1, wherein: and in the sixth step, the heating temperature is 180-240 ℃, and the setting time is 25-45 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010799916.3A CN111893591A (en) | 2020-08-11 | 2020-08-11 | Preparation method of PTFE (polytetrafluoroethylene) long fibers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010799916.3A CN111893591A (en) | 2020-08-11 | 2020-08-11 | Preparation method of PTFE (polytetrafluoroethylene) long fibers |
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| CN111893591A true CN111893591A (en) | 2020-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010799916.3A Pending CN111893591A (en) | 2020-08-11 | 2020-08-11 | Preparation method of PTFE (polytetrafluoroethylene) long fibers |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IE33701L (en) * | 1969-01-28 | 1970-07-28 | Chemiefaser Lenzing Ag | Production of fibres |
| HK1068379A1 (en) * | 2003-01-20 | 2005-04-29 | Yeu Ming Tai Chemical Ind Co L | Polytetrafluoroethylene fiber and method for manufacturing the same |
| CN102051703A (en) * | 2010-11-25 | 2011-05-11 | 辽宁省金氟龙环保新材料有限公司 | Manufacturing method of film split polytetrafluoroethylene fibers |
| CN102071483A (en) * | 2010-11-22 | 2011-05-25 | 宋朋泽 | Preparation method of polytetrafluoroethylene chopped fiber |
| CN106381537A (en) * | 2016-08-29 | 2017-02-08 | 常州万容新材料科技有限公司 | Manufacturing method of PTFE (polytetrafluoroethylene) short fibers |
| CN107938007A (en) * | 2018-01-03 | 2018-04-20 | 江苏金由新材料有限公司 | The system and method for PTFE staple fibers is prepared using different molecular weight material |
-
2020
- 2020-08-11 CN CN202010799916.3A patent/CN111893591A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IE33701L (en) * | 1969-01-28 | 1970-07-28 | Chemiefaser Lenzing Ag | Production of fibres |
| HK1068379A1 (en) * | 2003-01-20 | 2005-04-29 | Yeu Ming Tai Chemical Ind Co L | Polytetrafluoroethylene fiber and method for manufacturing the same |
| CN102071483A (en) * | 2010-11-22 | 2011-05-25 | 宋朋泽 | Preparation method of polytetrafluoroethylene chopped fiber |
| CN102051703A (en) * | 2010-11-25 | 2011-05-11 | 辽宁省金氟龙环保新材料有限公司 | Manufacturing method of film split polytetrafluoroethylene fibers |
| CN106381537A (en) * | 2016-08-29 | 2017-02-08 | 常州万容新材料科技有限公司 | Manufacturing method of PTFE (polytetrafluoroethylene) short fibers |
| CN107938007A (en) * | 2018-01-03 | 2018-04-20 | 江苏金由新材料有限公司 | The system and method for PTFE staple fibers is prepared using different molecular weight material |
Non-Patent Citations (3)
| Title |
|---|
| 上海交通大学主编: "《机电词典》", 31 October 1991, 机械工业出版社 * |
| 温志远 等: "《塑料成型工艺及设备 第2版》", 30 November 2012, 北京理工大学出版社 * |
| 王加龙: "《塑料成型工艺》", 30 June 2009, 印刷工业出版社 * |
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Application publication date: 20201106 |