CN104746155B - Thermotropic liquid crystal polyarylater monofilament heat treatment device and heat treatment method - Google Patents
Thermotropic liquid crystal polyarylater monofilament heat treatment device and heat treatment method Download PDFInfo
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- CN104746155B CN104746155B CN201510135152.7A CN201510135152A CN104746155B CN 104746155 B CN104746155 B CN 104746155B CN 201510135152 A CN201510135152 A CN 201510135152A CN 104746155 B CN104746155 B CN 104746155B
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- heat treatment
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- monofilament
- heating
- thermotropic liquid
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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
- D01D13/00—Complete machines for producing artificial threads
- D01D13/02—Elements of machines in combination
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Polyesters Or Polycarbonates (AREA)
- Treatment Of Fiber Materials (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention provides a thermotropic liquid crystal polyarylater monofilament heat treatment device and a heat treatment method thereof. The heat treatment device is a heated vacuum airtight box body, and a pay-off roller, a heating tension roller and a take-up roller are sequentially arranged in the box body. A heating device and a vacuum suction device are respectively arranged outside the box body. A monofilament is fed into the heated vacuum heat treatment device to perform heat treatment. The thermotropic liquid crystal polyarylater monofilament is heated and drafted in the closed box body, oxidative degradation of the monofilament is avoided, strength unevenness and drawing irregularity of the monofilament are reduced, and the strength and modulus of the monofilament are improved. The heat treatment method is simple in operation and easy to implement, and the problems of existing complicated polyester fiber heat treatment steps and fiber oxidation degradation are solved.
Description
Technical field
The invention belongs to Thermotropic Liquid Crystalline Copolyesters fibre technology field, it is related to a kind of Thermotropic Liquid Crystalline Copolyesters monofilament heat treatment
Device and heat treatment method.
Background technology
Thermotropic liquid crystal polyarylate fiber has high-strength and high-modulus, resistance to chemical attack, low water absorption, good dimensional stability etc.
Series of advantages, can be widely used in the fields such as automobile, cable protective, military project and physical protection.Thermotropic Liquid Crystalline Copolyesters are fine
National to full realization and national defense construction the fast development of the development and application of dimension has great importance.
The section of thermotropic liquid crystal polyarylate can obtain Thermotropic Liquid Crystalline Copolyesters monofilament through melt spinning.But by section point
Son amount restriction, the performance such as obtained filament strength and modulus frequently not very high it is impossible to directly apply to military project and other
Special dimension.Intensity and modulus and other performances of fiber generally can be lifted by heat treatment.Existing document reports other
The heat treatment method of chemical fibre, is all carried out mostly in open no vacuum environment.The China of cn101748534 a is specially
Profit application reports a kind of chemical fiber heat-treating machine and processing method, and it carries out the process of fiber in open environment, only
It is to have reached the purpose reducing fiber dry-hot shrinkage, intensity and the modulus of fiber can not be lifted.And open process
It is uneven that environment makes fiber be heated, and lack vacuum and be then unfavorable for stablizing of fibre structure, is susceptible to aoxidize.This
Outward, also carry out heat treatment of fiber through the method frequently with on-line continuous nitrogen charging in industry although it can be avoided that aoxidizing but equipment throwing
Money is larger, relatively costly, also there is a problem of that fiber irregularity is high.
Content of the invention
The present invention is directed to disadvantage mentioned above, there is provided a kind of Thermotropic Liquid Crystalline Copolyesters monofilament annealing device and method, reaches
Avoid monofilament to aoxidize to be heated inequality and lift its intensity and modulus and the purpose of reduction irregularity.
For achieving the above object, the present invention takes following technical proposals to realize:
The present invention provides a kind of Thermotropic Liquid Crystalline Copolyesters monofilament annealing device, and described annealing device is heated true for one
Empty containment housing, is sequentially provided with let off roll, heating jockey pulley and wind-up roll in casing；It is respectively equipped with heater and true outside casing
Empty aspirator.
Further, described heater includes hotline heater, and described hotline heater is provided with two-way heating oil pipe,
Wherein one tunnel is oil pipe fin generator, by blower fan, circulating air is sent into casing；Another road conduction oil conveys through oil pump
To heating jockey pulley cavity.
Preferably, the vacuum of described casing is 76mmhg.
Further, the temperature of casing is 250～290 DEG C.
The present invention also provides a kind of Thermotropic Liquid Crystalline Copolyesters monofilament heat treatment method, and monofilament is put into an annealing device
In be heat-treated, described annealing device is the vacuum tightness casing that is heated；Monofilament is wound around successively by putting in casing
Winding up roller, heating jockey pulley and wind-up roll；By the heater of setting outside casing, casing and heating jockey pulley are heated；
By the vacuum suction apparatus of setting outside casing, casing is vacuumized.
Further, described heater includes hotline heater, and described hotline heater is provided with two-way heating oil pipe,
Wherein one tunnel is oil pipe fin generator, by blower fan, circulating air is sent into casing；Another road conduction oil conveys through oil pump
To heating jockey pulley cavity interior circulation.
Preferably, the temperature of the temperature in casing and heating jockey pulley is 250～290 DEG C；In casing, vacuum is
76mmhg.
Preferably, the speed of described let off roll is 0.01～0.5m/min, and the speed of wind-up roll is 0.02～1m/min,
The tension force of heating jockey pulley is 0.01～0.5mpa.
Preferably, the time of described heat treatment is 6～32h.
Preferably, the wind speed of circulating air is 0.2～1.5m/s.
In a word, the invention has the benefit that the annealing device of present invention offer and method, design is a kind of to be subject to thermal vacuum
Containment housing so that Thermotropic Liquid Crystalline Copolyesters monofilament is heat-treated under anaerobic, hot conditions, strand occur reset fortune
Dynamic, crystallization is more perfect, can significantly be an up the performances such as its intensity, modulus and heat resistance.
The present invention is heated to casing and heating jockey pulley respectively using two-way oil circuit, realizes temperature in heat treatment process
Uniformly；Keep the balanced ventilation of appropriate speed in the side of casing, on the one hand keep case body temperature；On the other hand pass through vacuum
Aspirator constantly vacuumizes the oxygen-free environment it is ensured that in casing, and the oxidation reducing heat treatment is so that Thermotropic Liquid Crystalline Copolyesters are former
Fine even structure, and its intensity and modulus can be lifted.Additionally, different product can be reached by control process time and temperature
Require, low processing cost.
Meanwhile, the heat treatment method of the present invention is easy to operate, convenient to carry out, solves conventional polyester fiber and heats process step
Suddenly the loaded down with trivial details problem with cellulose degradation.
Brief description
Fig. 1 is the structural representation of Thermotropic Liquid Crystalline Copolyesters monofilament annealing device in one embodiment of the invention.
Specific embodiment
Describe the present invention with specific embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of Thermotropic Liquid Crystalline Copolyesters monofilament annealing device in one embodiment of the invention.As Fig. 1
Shown, the annealing device of the present invention is the vacuum tightness casing that is heated.
It is sequentially provided with let off roll 1, heating jockey pulley 2 and wind-up roll 3 in casing；Monofilament is wrapped in let off roll 1, heating successively
On jockey pulley 2 and wind-up roll 3.
It is additionally provided with heater 4, in the present embodiment, heater is hot oil heater outside casing.
Hotline heater is provided with two-way heating oil pipe, and wherein one tunnel is oil pipe fin generator 5, will by blower fan 6
The air port 7 that circulating air is arranged by casing side, enters casing；Another road conduction oil is delivered to heating jockey pulley through oil pump 8
It is circulated in the body of chamber 2.According to the needs of temperature, the wind speed of circulating air can be adjusted it is preferred that the wind speed of circulating air is
0.2～1.5m/s.
By the attemperating unit of hotline heater 4 it is ensured that the temperature in casing is substantially permanent with the temperature of heating jockey pulley 2
Fixed, according to different product needs, adjust temperature required it is preferred that case body temperature is 250～290 DEG C.
The outer opposite side of casing is additionally provided with vacuum suction apparatus 9.By constantly vacuumizing of vacuum suction apparatus 9, keep case
Internal vacuum is about 76mmhg.
In the present invention, performance according to different product and processing needs, different rotating speeds can be selected it is preferred that described
The speed of let off roll be 0.01～0.5m/min, the speed of wind-up roll is 0.02～1m/min, and the tension force of heating jockey pulley is
0.01～0.5mpa.
Likewise, according to the performance need of different product, corresponding adjustment heat treatment time is it is preferred that described heat treatment
Time be 6～32h.
Different monofilament and different processing conditions are selected respectively using above-mentioned annealing device, the embodiment tool obtaining
Body is as follows:
Embodiment 1
The intensity of Thermotropic Liquid Crystalline Copolyesters monofilament is 12.1cn/detx, and described Technology for Heating Processing is casing and jockey pulley
Temperature be 270 DEG C, circulation wind speed is 0.5m/s, and vacuum is 76mm hg, and unreeling roller speed is 0.01m/min, and wind-up roll is fast
Spend for 0.02m/min, jockey pulley tension force is 0.1mpa, heat treatment time is 18h.After heat treatment, this Thermotropic Liquid Crystalline Copolyesters
The intensity of fiber increases to 16.8cn/detx, and elongation at break is 2.4%, and strong irregularity is 0.9%, and stretching irregularity is 1.2%.
Embodiment 2
The intensity of Thermotropic Liquid Crystalline Copolyesters monofilament is 12.1cn/detx, and described Technology for Heating Processing is casing and jockey pulley
Temperature be 280 DEG C, circulation wind speed is 0.3m/s, and vacuum is 76mm hg, and unreeling roller speed is 0.01m/min, and wind-up roll is fast
Spend for 0.05m/min, jockey pulley tension force is 0.1mpa, heat treatment time is 20h.After heat treatment, this Thermotropic Liquid Crystalline Copolyesters
The intensity of fiber increases to 18.1cn/detx, and elongation at break is 1.8%, and strong irregularity is 0.9%, and stretching irregularity is 1.1%.
Embodiment 3
The intensity of Thermotropic Liquid Crystalline Copolyesters monofilament is 13.9cn/detx, and described Technology for Heating Processing is casing and jockey pulley
Temperature be 280 DEG C, circulation wind speed is 0.8m/s, and vacuum is 76mm hg, and unreeling roller speed is 0.1m/min, and wind-up roll is fast
Spend for 0.2m/min, jockey pulley tension force is 0.4mpa, heat treatment time is 28h.After heat treatment, this Thermotropic Liquid Crystalline Copolyesters is fine
The intensity of dimension increases to 20.6cn/detx, and elongation at break is 3.1%, and strong irregularity is 0.8%, and stretching irregularity is 0.6%.
Embodiment 4
The intensity of Thermotropic Liquid Crystalline Copolyesters monofilament is 13.9cn/detx, and described Technology for Heating Processing is casing and jockey pulley
Temperature be 290 DEG C, circulation wind speed is 1.3m/s, and vacuum is 76mm hg, and unreeling roller speed is 0.3m/min, and wind-up roll is fast
Spend for 0.6m/min, jockey pulley tension force is 0.5mpa, heat treatment time is 32h.After heat treatment, this Thermotropic Liquid Crystalline Copolyesters is fine
The intensity of dimension increases to 21.2cn/detx, and elongation at break is 3.1%, and strong irregularity is 0.4%, and stretching irregularity is 0.5%.
Embodiment 5
The intensity of Thermotropic Liquid Crystalline Copolyesters monofilament is 12.1cn/detx, and described Technology for Heating Processing is casing and jockey pulley
Temperature be 280 DEG C, circulation wind speed is 1.5m/s, and vacuum is 76mm hg, and unreeling roller speed is 0.5m/min, and wind-up roll is fast
Spend for 1m/min, jockey pulley tension force is 0.5mpa, heat treatment time is 24h.After heat treatment, this Thermotropic Liquid Crystalline Copolyesters fiber
Intensity increase to 17.4cn/detx, elongation at break be 4.6%, strong irregularity be 1.8%, stretch irregularity be 1.5%.
Embodiment 6
The intensity of Thermotropic Liquid Crystalline Copolyesters monofilament is 12.1cn/detx, and described Technology for Heating Processing is casing and jockey pulley
Temperature be 270 DEG C, circulation wind speed is 0.5m/s, and vacuum is 76mm hg, and unreeling roller speed is 0.05m/min, and wind-up roll is fast
Spend for 0.1m/min, jockey pulley tension force is 0.4mpa, heat treatment time is 30h.After heat treatment, this Thermotropic Liquid Crystalline Copolyesters is fine
The intensity of dimension increases to 16.2cn/detx, and elongation at break is 3.9%, and strong irregularity is 1.4%, and stretching irregularity is 0.9%.
Embodiment 7
The intensity of Thermotropic Liquid Crystalline Copolyesters monofilament is 11.8cn/detx, and described Technology for Heating Processing is casing and jockey pulley
Temperature be 290 DEG C, circulation wind speed is 1.2m/s, and vacuum is 76mm hg, and unreeling roller speed is 0.04m/min, and wind-up roll is fast
Spend for 0.08m/min, jockey pulley tension force is 0.4mpa, heat treatment time is 32h.After heat treatment, this Thermotropic Liquid Crystalline Copolyesters
The intensity of fiber increases to 18.5cn/detx, and elongation at break is 1.9%, and strong irregularity is 0.7%, and stretching irregularity is 0.6%.
Embodiment 8
The intensity of Thermotropic Liquid Crystalline Copolyesters monofilament is 11.8cn/detx, and described Technology for Heating Processing is casing and jockey pulley
Temperature be 290 DEG C, circulation wind speed is 1.5m/s, and vacuum is 76mm hg, and unreeling roller speed is 0.03m/min, and wind-up roll is fast
Spend for 0.06m/min, jockey pulley tension force is 0.5mpa, heat treatment time is 16h.After heat treatment, this Thermotropic Liquid Crystalline Copolyesters
The intensity of fiber increases to 17.2cn/detx, and elongation at break is 2.6%, and strong irregularity is 1.1%, and stretching irregularity is 0.9%.
By above-described embodiment as can be seen that after annealing device through the present invention and method, this Thermotropic Liquid Crystalline Copolyesters
The intensity of fiber all significantly increases, and elongation at break increases, and strong irregularity is to have different degrees of decline with stretching irregularity.
Although the present invention is open as above with preferred embodiment, it is not for limiting the present invention, any this area
Without departing from the spirit and scope of the present invention, the methods and techniques content that may be by the disclosure above is to this for technical staff
Bright technical scheme makes possible variation and modification, and therefore, every content without departing from technical solution of the present invention, according to the present invention
Technical spirit any simple modification, equivalent variations and modification that above example is made, belong to the technology of the present invention side
The protection domain of case.
Claims (8)
1. a kind of Thermotropic Liquid Crystalline Copolyesters monofilament annealing device is it is characterised in that described annealing device is heated very for one
Empty containment housing, is sequentially provided with let off roll, heating jockey pulley and wind-up roll in casing；It is respectively equipped with heater and true outside casing
Empty aspirator；
Described heater includes hotline heater, and described hotline heater is provided with two-way heating oil pipe, and wherein one tunnel is
Circulating air is sent into casing by blower fan by oil pipe fin generator；Another road conduction oil is delivered to heating tension force through oil pump
In roller cavity.
2. annealing device according to claim 1 is it is characterised in that the vacuum of described casing is 76mmhg.
3. annealing device according to claim 1 is it is characterised in that the temperature of casing is 250～290 DEG C.
4. a kind of Thermotropic Liquid Crystalline Copolyesters monofilament heat treatment method is it is characterised in that put into monofilament in one annealing device
It is heat-treated, described annealing device is the vacuum tightness casing that is heated；Monofilament is wound around successively by unreeling in casing
Roller, heating jockey pulley and wind-up roll；By the heater of setting outside casing, casing and heating jockey pulley are heated；Logical
The vacuum suction apparatus crossing setting outside casing vacuumize to casing；
Described heater includes hotline heater, and described hotline heater is provided with two-way heating oil pipe, and wherein one tunnel is
Circulating air is sent into casing by blower fan by oil pipe fin generator；Another road conduction oil is delivered to heating tension force through oil pump
Roller cavity interior circulation.
5. heat treatment method according to claim 4 is it is characterised in that the temperature of temperature in casing and heating jockey pulley
For 250～290 DEG C；In casing, vacuum is 76mmhg.
6. heat treatment method according to claim 4 it is characterised in that the speed of described let off roll be 0.01～
0.5m/min, the speed of wind-up roll is 0.02～1m/min, and the tension force of heating jockey pulley is 0.01～0.5mpa.
7. heat treatment method according to claim 4 is it is characterised in that the time of described heat treatment is 6～32h.
8. heat treatment method according to claim 4 is it is characterised in that the wind speed of circulating air is 0.2～1.5m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510135152.7A CN104746155B (en) | 2015-03-25 | 2015-03-25 | Thermotropic liquid crystal polyarylater monofilament heat treatment device and heat treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510135152.7A CN104746155B (en) | 2015-03-25 | 2015-03-25 | Thermotropic liquid crystal polyarylater monofilament heat treatment device and heat treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104746155A CN104746155A (en) | 2015-07-01 |
| CN104746155B true CN104746155B (en) | 2017-01-18 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110983468B (en) * | 2019-12-20 | 2021-04-06 | 江门市德众泰工程塑胶科技有限公司 | Preparation method of high-strength liquid crystal polymer fiber |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05132816A (en) * | 1991-11-06 | 1993-05-28 | Mitsubishi Rayon Co Ltd | Production of polyester fiber |
| CN101476170B (en) * | 2008-12-29 | 2012-11-07 | 闫镇达 | Method and apparatus for producing high strength, high modulus polyethylene filament by melt drawing |
| CN101748534A (en) * | 2009-12-17 | 2010-06-23 | 天津工业大学 | Chemical fiber heat-treating machine |
| CN102926022B (en) * | 2011-08-09 | 2015-05-20 | 曹煜彤 | Preparation method for aromatic copolyamide fibers |
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Address after: 214000 lakes in Jiangsu province Wuxi City foreshore Hu Dai Hongxiang Industrial Park Road No. 18 Patentee after: Wuxi Jin Tong high fiber Limited by Share Ltd Address before: No. 166, Suzhou Xi Road, Nan Chang village, Binhu District, Wuxi, Jiangsu Province Patentee before: Wuxi Jintong Fiber Co., Ltd. |