CN106498517A - A kind of production method of PBT chopped fibers - Google Patents
A kind of production method of PBT chopped fibers Download PDFInfo
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- CN106498517A CN106498517A CN201510562793.0A CN201510562793A CN106498517A CN 106498517 A CN106498517 A CN 106498517A CN 201510562793 A CN201510562793 A CN 201510562793A CN 106498517 A CN106498517 A CN 106498517A
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Abstract
The present invention relates to a kind of production method of PBT chopped fibers, with pure PBT as raw material, by the direct pipeline of molten state PBT, or section state PBT is melted through Screw Extrusion, spinning obtains as-spun fibre, and then through twice drawing-off, sizing, curling, final cutting forms the PBT chopped fibers of specific length.The PBT chopped fibers that PBT chopped fibers production method of the present invention is obtained can reach following index：Fiber number be 1.33dtex～4.50dtex, fracture strength be 2.2～5.5cN/dtex, extension at break 20～60%；And, the fibrous elasticity is good, easy dyeing, soft, anti-soil effect are strong.
Description
Technical field
The present invention relates to a kind of processing of PBT chopped fibers, belongs to synthetic fibers production technical field.
Background technology
PBT (polybutylene terephthalate (PBT)) product is widely used in optical fiber jacket, fiberglass reinforced engineering
Plastics and production long filament.PBT fibers are mainly used as long filament, and people are referred to as PBT elastic filament.PBT bullets
Power silk has higher elastic and good durability, dimensional stability, soft, hygroscopicity, wear-resisting
Property and fibre crimpn are good.Its elasticity is suitable with nylon, and tensile elasticity and the elasticity of compression are preferable, elastic recovery
Rate is respectively provided with special retractility under the conditions of dry and wet state, and elasticity does not receive surrounding temperature better than terylene
The impact of degree change, price far below spandex fibre etc., be particularly well-suited to make swimsuit, tights,
Training clothes, gym outfit, gym wear, tennis togs, dancing tightss, elastic force jean, ski trousers, long cylinder
The high elastic textiles such as socks, the binder that medically applies.
PBT chopped fibers have the modified product of very small amount application, the blending of most of and other materials or copolymerization, do not have
There is the technique for producing pure PBT chopped fibers.Existing patent is as follows：
It is related to a kind of PBT modified fibres in Chinese patent 201210099806.1, which includes according to weight ratio
Following component：PET：40%-50%；ECDP：0-50%；PBT：10%-60%；
Chinese patent 200610040491.8 discloses a kind of colour bamboo-carbon composite short fiber and preparation method thereof, should
The concrete technology step of method is：Bamboo charcoal functional agglomerate is mixed by following weight ratio with PBT sections：Bamboo charcoal
The bamboo charcoal functional agglomerate of content 2～8%：PBT sections=1: 3～39, obtain component A；By Masterbatch with
PET sections are by following weight than mixing：Pigment content is 1～30% Masterbatch: PET sections=1:
9～39, obtain component B.
Chinese patent 201010194080.0 is related to a kind of figured sea-island staple fibre and preparation method thereof, described
The island group of figured sea-island staple fibre is divided into polybutylene terephthalate, and sea component is alkali-soluble polyester；
PBT micro staple fibers are obtained through alkali process by figured type PBT/PET sea-island staple fibers.
In addition, 2002228044 patents of Japan Patent JP are mainly the preparation method of high intensity PBT fiber.
Further, a pertinent literature《The physical characteristics of PBT chopped fibers and yarn forming performance pre-test》In mention Europe
Hoechst companies define PBT fibers production base, and Nylstar companies release the yarn of Elite, and article is situated between
The index of quality of fiber that continued and the performance of yarn, do not refer to the production method of the fiber.Have above-mentioned understand,
Do not have the production method of pure PBT chopped fibers at present both at home and abroad.
Content of the invention
It is an object of the invention to overcoming the shortcomings of prior art, there is provided a kind of production of PBT chopped fibers
Method.The purpose of the present invention is achieved through the following technical solutions：
A kind of production method of PBT chopped fibers, with pure PBT as raw material, is directly managed by molten state PBT
Road is conveyed, or section state PBT is melted through Screw Extrusion, and spinning obtains as-spun fibre, then through twice
Drawing-off, sizing, curling, final cutting form the PBT chopped fibers of specific length.
Preferably, the fusing point of the PBT for being used is 220～225 DEG C, and intrinsic viscosity is 0.80-
1.20dl/g.
Preferably, the processing parameter of the PBT as-spun fibres is：Spinning temperature control 250～
275 DEG C, ring blowing speed be 0.8～1.3m/s, pathogenic wind-warm be 15～23 DEG C, spinning speed be 900～
1300m/min.
Further, the parameter of the after-processing technology of the PBT chopped fibers is：Draft ratio for (2.0～
3.2) × (1.0～1.3), drawing-off bath temperature are 40～65 DEG C, and drawing-off roll temperature is 125～165 DEG C, fixed
Type temperature is 140～170 DEG C, and coiling temperature is 80～100 DEG C.
The prominent substantive distinguishing features of the present invention and marked improvement are mainly reflected in following several respects：
(1) the PBT chopped fibers that PBT chopped fibers production method of the present invention is obtained can reach following finger
Mark：It is 2.2～5.5cN/dtex that fiber number is 1.33dtex～4.50dtex, fracture strength, extension at break 20～
60%.
(2) PBT chopped fibers production method control spinning temperature of the present invention is made just at 250～275 DEG C
The shaping of raw fiber is good, and aft-loaded airfoil performance is good, and the quality of the product for obtaining is also high.
(3) the PBT chopped fibers that PBT chopped fibers production method of the present invention is obtained have advantages below：
Elastic good, easy dyeing, soft, anti-soil effect are strong.
Specific embodiment
Inventor innovatively proposes a kind of production method of PBT chopped fibers, with pure PBT as original
Material, by the direct pipeline of molten state PBT, or section state PBT is melted through Screw Extrusion, spinning
As-spun fibre is obtained, then through twice drawing-off, sizing, curling, final cutting forms specific length
PBT chopped fibers..Wherein, the fusing point of the PBT for using is 220～225 DEG C, and intrinsic viscosity is 0.80-
1.20dl/g.At 250～275 DEG C, ring dries speed for 0.8～1.3m/s, and pathogenic wind-warm is for spinning temperature control
15～23 DEG C, 900～1300m/min of spinning speed, fiberizing are good.
As PBT crystalline rates are 10 times of PET, PBT fiber as-spun fibres have certain degree of crystallinity,
Drawing-off hydraulic performance decline, needs using the after-processing technology being suitable for：Draft ratio (2.0～3.2) × (1.0～
1.3), 45～65 DEG C of drawing-off bath temperature, 125～165 DEG C of drawing-off roll temperature, setting temperature 140～170
DEG C, 80～100 DEG C of coiling temperature.
The PBT chopped fibers fiber number of aforementioned production method production is 1.33dtex～4.50dtex, fracture strength
2.2～5.5cN/dtex, extension at break 20～60%.Below in conjunction with the technology that specific embodiment proves the present invention
Scheme and effect.
Embodiment
Table 1 is inventor is cut into slices spinning production line using polyester staple fiber, adopt intrinsic viscosity for 0.93dl/g,
Fusing point is that 223.5 DEG C of PBT sections produce two kinds of specifications of 1.33dt × 38mm and 1.56dt × 38mm
The main technologic parameters of PBT chopped fibers.
The main technologic parameters of 1 PBT chopped fibers of table
The performance indications of 2 two kinds of product specification products of table
| Project | A | B |
| Line density dtex | 1.32 | 1.55 |
| Length (mm) | 37.2 | 36.9 |
| Fracture strength (cN/dtex) | 4.53 | 4.22 |
| Elongation at break (%) | 37.0 | 42.1 |
| Overlength fiber rate (%) | 0.4 | 0.5 |
| Over-length fibre content (mg/100g) | 0.6 | 0.7 |
| Fault content (mg/100g) | 0.7 | 0.6 |
| Crispation number (individual/25mm) | 11.2 | 10.3 |
| Crimp percent (%) | 12.4 | 10.6 |
| 180 DEG C of dry-hot shrinkages (%) | 4.8 | 5.2 |
| Ratio resistance (Ω .cm) | 2.4×107 | 1.9×107 |
Table 3 is inventor is cut into slices spinning production line using polyester staple fiber, adopt intrinsic viscosity for 1.04dl/g,
Fusing point is two kinds of PBT of 2.22dt × 38mm and 3.33dt × 38mm that 224.3 DEG C of PBT sections are produced
The main technologic parameters of chopped fiber.
The main technologic parameters of 3 PBT chopped fibers of table
The performance indications of 4 two kinds of product specification products of table
| Project | A | B |
| Line density dtex | 2.21 | 3.38 |
| Length (mm) | 37.5 | 37.8 |
| Fracture strength (cN/dtex) | 4.76 | 3.98 |
| Elongation at break (%) | 37.8 | 45.2 |
| Overlength fiber rate (%) | 0.5 | 0.3 |
| Over-length fibre content (mg/100g) | 0.6 | 0.5 |
| Fault content (mg/100g) | 0.8 | 0.5 |
| Crispation number (individual/25mm) | 11.7 | 10.6 |
| Crimp percent (%) | 12.3 | 10.1 |
| 180 DEG C of dry-hot shrinkages (%) | 4.1 | 4.8 |
| Ratio resistance (Ω .cm) | 3.6×107 | 4.6×107 |
The above is only the preferred embodiment of the present invention, it is noted that common for the art
For technical staff, on the premise of without departing from the technology of the present invention principle, some improvement and change can also be made
Type, these improvement and modification should also be considered as within protection scope of the present invention.
Claims (4)
1. a kind of production method of PBT chopped fibers, it is characterised in that：With pure PBT as raw material, by the direct pipeline of molten state PBT, or section state PBT melts the method through Screw Extrusion, and spinning obtains as-spun fibre, and then through twice drawing-off, sizing, curling, final cutting forms the PBT chopped fibers of specific length.
2. the production method of a kind of PBT chopped fibers according to claim 1, it is characterised in that：The fusing point of the PBT for being used is 220～225 DEG C, and intrinsic viscosity is 0.80-1.20dl/g.
3. the production method of a kind of PBT chopped fibers according to claim 2, it is characterised in that：The processing parameter of the PBT as-spun fibres is：At 250～275 DEG C, ring blowing speed is 0.8～1.3m/s, and pathogenic wind-warm is 15～23 DEG C, and spinning speed is 900～1300m/min for spinning temperature control.
4. the production method of a kind of PBT chopped fibers according to claim 3, it is characterised in that：The parameter of the after-processing technology of the PBT chopped fibers is：Draft ratio is（2.0～3.2）×（1.0～1.3）, drawing-off bath temperature is 40～65 DEG C, and drawing-off roll temperature is 125～165 DEG C, and setting temperature is 140～170 DEG C, and coiling temperature is 80～100 DEG C.
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| CN201510562793.0A CN106498517A (en) | 2015-09-07 | 2015-09-07 | A kind of production method of PBT chopped fibers |
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| CN201510562793.0A CN106498517A (en) | 2015-09-07 | 2015-09-07 | A kind of production method of PBT chopped fibers |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107955992A (en) * | 2017-10-19 | 2018-04-24 | 无锡市兴盛新材料科技有限公司 | A kind of short fine and its fused mass directly spinning preparation methods of high-quality PBT |
| CN109385726A (en) * | 2017-08-07 | 2019-02-26 | 中国石化仪征化纤有限责任公司 | A kind of preparation method of the blended short fine elastic fabric of PBT/PET |
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| JPH11172528A (en) * | 1997-12-08 | 1999-06-29 | Toray Ind Inc | Production of polyester melt-forming product |
| CN101760796A (en) * | 2009-12-11 | 2010-06-30 | 仪征市星海化纤有限公司 | Preparing method of PBT false-twist textured yarns |
| CN102732989A (en) * | 2012-07-19 | 2012-10-17 | 江苏开利地毯股份有限公司 | Production method for polybutylene terephthalate (PBT) BCF (bulk continuous filament) |
| CN103741253A (en) * | 2013-12-27 | 2014-04-23 | 马海燕 | Large-diameter polymer bent filament and production method thereof |
| CN104195653A (en) * | 2014-07-29 | 2014-12-10 | 中国石油化工股份有限公司 | PBT fiber manufacturing method based on high speed one-step method |
| CN104213239A (en) * | 2014-09-15 | 2014-12-17 | 马海燕 | Large-diameter polymer bulked monofilament and production method thereof |
-
2015
- 2015-09-07 CN CN201510562793.0A patent/CN106498517A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11172528A (en) * | 1997-12-08 | 1999-06-29 | Toray Ind Inc | Production of polyester melt-forming product |
| JP4174092B2 (en) * | 1997-12-08 | 2008-10-29 | 東レ株式会社 | Method for producing polyester melt molding |
| CN101760796A (en) * | 2009-12-11 | 2010-06-30 | 仪征市星海化纤有限公司 | Preparing method of PBT false-twist textured yarns |
| CN102732989A (en) * | 2012-07-19 | 2012-10-17 | 江苏开利地毯股份有限公司 | Production method for polybutylene terephthalate (PBT) BCF (bulk continuous filament) |
| CN103741253A (en) * | 2013-12-27 | 2014-04-23 | 马海燕 | Large-diameter polymer bent filament and production method thereof |
| CN104195653A (en) * | 2014-07-29 | 2014-12-10 | 中国石油化工股份有限公司 | PBT fiber manufacturing method based on high speed one-step method |
| CN104213239A (en) * | 2014-09-15 | 2014-12-17 | 马海燕 | Large-diameter polymer bulked monofilament and production method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109385726A (en) * | 2017-08-07 | 2019-02-26 | 中国石化仪征化纤有限责任公司 | A kind of preparation method of the blended short fine elastic fabric of PBT/PET |
| CN107955992A (en) * | 2017-10-19 | 2018-04-24 | 无锡市兴盛新材料科技有限公司 | A kind of short fine and its fused mass directly spinning preparation methods of high-quality PBT |
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Application publication date: 20170315 |
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