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Regenerated polyester fiber spinning process capable of effectively solving yarn breaking phenomenon

A recycled polyester and fiber spinning technology, applied in fiber cutting, fiber treatment, spinning solution degassing, etc., can solve the problems of raw material quality decline, quality decline, tow breakage, etc., and achieve uniform molecular weight and improved melt quality Effect

Active Publication Date: 2017-05-24
浙江逸含化纤有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It will destroy the size of PET molecules in the PET melt, resulting in a decrease in the quality of raw materials, and will cause the breakage of the filaments during subsequent cooling and molding, which not only increases the consumption of raw materials, but also produces a large number of defective filaments, forming defects
As a result, the product is inferior and the quality is reduced

Method used

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  • Regenerated polyester fiber spinning process capable of effectively solving yarn breaking phenomenon
  • Regenerated polyester fiber spinning process capable of effectively solving yarn breaking phenomenon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A regenerated polyester fiber spinning process that effectively solves the phenomenon of broken filaments, comprising the following steps:

[0034] 1) Mixing

[0035] 35 parts of bottle flakes and 55 parts of foam materials are mixed in the vacuum drum dryer with 2.2 tons per drum in the feeding workshop;

[0036] 2) dry

[0037] The material obtained in step 1) is in the vacuum drum dryer, and the mixed material is continuously stirred at a speed of 3 revolutions per clock, and is heated to 150 degrees by steam at a heating rate of 30 degrees per hour, and kept for 7 hours; The water ring-Roots vacuum unit maintains a vacuum of 0.01MPa in the vacuum drum dryer; finally, it can be discharged to the silo after the moisture is lower than 150PPM through the inspection room;

[0038] 3) Molten

[0039] The mixture in the silo in step 2) flows into the screw extruder below the silo by gravity, and the screw melts and conveys the material at a speed of 40 revolutions per m...

Embodiment 2

[0059] A regenerated polyester fiber spinning process that effectively solves the phenomenon of broken filaments, comprising the following steps:

[0060] 1) Mixing

[0061] 40 parts of bottle flakes and 60 parts of foam materials are mixed in the vacuum drum dryer with 2.2 tons per drum in the feeding workshop;

[0062] 2) dry

[0063] The material obtained in step 1) is in the vacuum drum dryer, and the mixed material is continuously stirred at a speed of 3 revolutions per clock, and is heated to 150 degrees by steam at a heating rate of 30 degrees per hour, and kept for 7 hours; The water ring-Roots vacuum unit maintains a vacuum of 0.01MPa in the vacuum drum dryer; finally, it can be discharged to the silo after the moisture is lower than 150PPM through the inspection room;

[0064] 3) Molten

[0065] The mixture in the silo in step 2) flows into the screw extruder below the silo by gravity, and the screw melts and conveys the material at a speed of 45 revolutions per min...

Embodiment 3

[0085] A regenerated polyester fiber spinning process that effectively solves the phenomenon of broken filaments, comprising the following steps:

[0086] 1) Mixing

[0087] 45 parts of bottle flakes and 65 parts of foam materials are mixed in the vacuum drum dryer with 2.2 tons per drum in the feeding workshop;

[0088] 2) dry

[0089] The material obtained in step 1) is in the vacuum drum dryer, and the mixed material is continuously stirred at a speed of 3 revolutions per clock, and is heated to 150 degrees by steam at a heating rate of 30 degrees per hour, and kept for 7 hours; The water ring-Roots vacuum unit maintains a vacuum of 0.01MPa in the vacuum drum dryer; finally, it can be discharged to the silo after the moisture is lower than 150PPM through the inspection room;

[0090] 3) Molten

[0091] The mixture in the silo in step 2) flows into the screw extruder below the silo by gravity, and the screw melts and conveys the material at a speed of 50 revolutions per m...

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Abstract

The invention discloses a regenerated polyester fiber spinning process capable of effectively solving the yarn breaking phenomenon. The process comprises the following steps of 1 material mixing, 2 drying, 3 melting, 4 filtering, 5 devolatilization, 6 spinning, 7 cooling shaping, 8 winding, 9 drying and finishing, 10 cutting off and 11 packaging. Due to the fact that a devolatilization system is additionally arranged after the processes of melting and filtering, a certain vacuum degree is kept in the system, small molecule materials and organic gas in melt rapidly break away from the interior of PET melt in the vacuum environment to be volatilized, a series of processes such as condensation and separation are conducted, harmless collection is achieved, and the collected materials serve as the raw materials of factories such as a paint factory. After the PET melt is subjected to devolatilization, the melt quality is significantly improved, the molecular weight is uniform, the organic gas is not carried any more, and the yarn breaking phenomenon in the cooling shaping process is solved.

Description

technical field [0001] The invention relates to a regenerated polyester fiber spinning process which effectively solves the phenomenon of broken filaments. Background technique [0002] Regenerated polyester staple fiber is made of discarded PET mineral water bottles, beverage bottles and other PET boards, sheets or polyester selvedges discarded by factories and consumers as raw materials after crushing and cleaning. After mixing---drying---melting---filtering---measurement---cooling forming---winding and other processes, the product is made by post-drawing treatment. [0003] Since the recycled raw materials are recycled from various garbage, there are inevitably various impurities in the raw materials, such as sugar and dust in beverage bottles, as well as PE, PP, PVC of other materials that are mixed due to unclear sorting And other plastic products, these impurities will decompose under the high temperature of the melting process, producing a large amount of small organ...

Claims

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Application Information

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IPC IPC(8): D01D1/04D01D1/10D01D5/08D01G1/00D02G1/00D02J1/22
CPCD01D1/04D01D1/106D01D5/08D01G1/00D02G1/00D02J1/224
Inventor 周小峰徐允武肖洪卫
Owner 浙江逸含化纤有限公司
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