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Polyester modified composite three-dimensional crimped short fiber

A three-dimensional crimping and polyester modification technology, applied in fiber processing, conjugated synthetic polymer artificial filament, filament/thread forming, etc., can solve the problems of fiber physical properties and poor viscosity that affect fiber spinning stability, etc. Achieve the effect of high bulkiness, good stability and easy weaving

Inactive Publication Date: 2014-12-17
HUZHOU TONGYI ENVIRONMENTAL PROTECTION FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The greater the difference in intrinsic viscosity between the two raw materials, the more fully the fiber will be self-curling, but the viscosity difference between too low and too high will affect the spinning stability of the fiber and the physical properties of the fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Use the existing ordinary PET to modify to obtain low-viscosity PET, so that the viscosity reaches 0.55 and the melting point reaches 220 degrees;

[0024] 2. Ordinary PET has a viscosity of 0.67 and a melting point of 265 degrees;

[0025] 3. The two kinds of PET are respectively melted and extruded by two screws into the spinning assembly for composite fiber formation, and then enter the winding silk barrel after being cooled by the surrounding air;

[0026] 4. After the total denier of all silk barrels is reached, bundle stretching is carried out to make the fiber reach the required fineness;

[0027] 5. Relax and heat-set, then cut off and pack into storage.

[0028] The mixing ratio of the low-viscosity PET to common PET is 1:2 by weight

[0029] The spinning process is as follows: low-viscosity PET spinning temperature is 250°C, common PET spinning temperature is 280°C; spinning speed is 3800mm / min;

[0030] The stretching described in step 4 is to carry out...

Embodiment 2

[0034] 1. Use the existing ordinary PET to modify to obtain low-viscosity PET, so that the viscosity reaches 0.55 and the melting point reaches 220 degrees;

[0035] 2. Ordinary PET has a viscosity of 0.67 and a melting point of 265 degrees;

[0036] 3. The two kinds of PET are respectively melted and extruded by two screws into the spinning assembly for composite fiber formation, and then enter the winding silk barrel after being cooled by the surrounding air;

[0037] 4. After the total denier of all silk barrels is reached, bundle stretching is carried out to make the fiber reach the required fineness;

[0038] 5. Relax and heat-set, then cut off and pack into storage.

[0039] The mixing ratio of the low-viscosity PET to common PET is 1:3 by weight

[0040] The spinning process is as follows: low-viscosity PET spinning temperature is 260°C, ordinary PET spinning temperature is 270°C; spinning speed is 4000mm / min;

[0041] The stretching described in step 4 involves two ...

Embodiment 3

[0045] 1. Use the existing ordinary PET to modify to obtain low-viscosity PET, so that the viscosity reaches 0.55 and the melting point reaches 220 degrees;

[0046] 2. Ordinary PET has a viscosity of 0.67 and a melting point of 265 degrees;

[0047] 3. The two kinds of PET are respectively melted and extruded by two screws into the spinning assembly for composite fiber formation, and then enter the winding silk barrel after being cooled by the surrounding air;

[0048] 4. After the total denier of all silk barrels is reached, bundle stretching is carried out to make the fiber reach the required fineness;

[0049] 5. Relax and heat-set, then cut off and pack into storage.

[0050] The mixing ratio of the low-viscosity PET to common PET is 1:3 by weight

[0051] The spinning process is as follows: low-viscosity PET spinning temperature is 250°C, ordinary PET spinning temperature is 280°C; spinning speed is 3900mm / min;

[0052] The stretching described in step 4 is to carry o...

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Abstract

The invention discloses a preparation method of polyester modified composite three-dimensional crimped short fiber. The preparation method is characterized by comprising the following steps of: firstly, performing modifying on common PED, so as to obtain low-viscosity PET, with the viscosity being 0.55 and the melting point being 220 degrees, secondly, getting common PET with the viscosity being 0.67 and the melting point being 265 degrees, thirdly, ensuring that the two types of PET are respectively molten and crushed through two screws and then enter a spinning component to perform composite fiber forming, and then enter winding filament containing buckets after being subjected to circular blowing and air cooling, fourthly, performing bundling stretching after the total denier number of all the filament containing buckets is achieved, so as to ensure that fiber achieves required fiber number, and fifthly, performing relaxation heat setting and then performing cutting, packaging and warehousing.

Description

technical field [0001] The invention relates to the technical field of differential fiber preparation, in particular to a preparation method of polyester modified composite three-dimensional crimped short fiber. Background technique [0002] Self-crimping fiber is a kind of untwisted crimped fiber obtained directly by spinning and drawing without twisting. In 2000, Chinese patent CN1136098A disclosed a method for manufacturing two-component self-crimping polymer fibers, which involves plying S / S two-component fiber bundles on the fiber production line through pulling, post-drawing, finishing, relaxation, and drying and heat-setting processed into self-curling fibers. This process step adopts the manufacturing method of plying and pulling, the manufacturing process is relatively complicated, and the bonding effect of the composite fiber is poor, and the self-curling performance is average. [0003] Polyethylene (PE) is a heat-shrinkable polymer with a simple chemical struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02J1/22D01F8/14D01D5/30
Inventor 潘月宝潘燕飞
Owner HUZHOU TONGYI ENVIRONMENTAL PROTECTION FIBER
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