Spun polyester pre-oriented yarn production method using recycled polyester bottle chips

A production method and technology for pre-oriented filaments, which are applied in the directions of melt spinning, melting of filament raw materials, and bundling of newly ejected filaments, to achieve the effects of small investment, reasonable and practical technology, and low operating costs.

Inactive Publication Date: 2014-02-12
ZHONGLANG ENVIRONMENTAL PROTECTION
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because it uses a general screw extruder, it is bound to have the defects described above;

Method used

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  • Spun polyester pre-oriented yarn production method using recycled polyester bottle chips
  • Spun polyester pre-oriented yarn production method using recycled polyester bottle chips

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] Implementation example 1

[0026] A kind of production method of recycled polyester bottle flake spinning polyester pre-oriented yarn, its steps are as follows:

[0027] 1. The bottle is broken

[0028] ①. The bottle bricks are unpacked and conveyed by a screw, and impurities (non-PET bottles) are removed on the sorting platform.

[0029] ②. The label paper is removed by the label stripping machine.

[0030] ③, through the screw conveyor to the crusher, crushed into a size suitable for spinning.

[0031] 2. Bottle cleaning

[0032] ①. Pass the broken bottle flakes through a high-speed centrifugal dehydrator to remove the water and part of the mud from the bottle flakes.

[0033] ②. Heat the alkali cleaning pot to about 90°C, add NaOH caustic soda and self-prepared cleaning solution, and clean for about one hour.

[0034] ③. After ...

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Abstract

Disclosed is a spun polyester pre-oriented yarn production method using recycled polyester bottle chips. The method is characterized by including 1, breaking bottles; 2, washing bottle chips; 3, drying the bottle chips; 4, extruding through an exhaust screw and vacuumizing, namely feeding dried bottle chips into an exhaust screw port, controlling the heating temperature between 292 DEG C to 300 DEG C from 7 to 9 regions; allowing the bottle chips to produce vapor and PVC oil gas after being extruded and melted, vacuumizing at an opening in the middle segment of the screw, allowing the degree of vacuum to be smaller than 100 Pa, and performing secondary filtering; spinning; winding to form the spun polyester pre-oriented yarn. Through the application of the exhaust screw adaptable to the polyester pre-oriented yarn spun through bottle chips, on the basis of an original physical spinning method, influences on spinning by impurities such as moisture, PVC and oil can be eliminated; color yarns which have multiple ends and fine denier and which are porous are produced, quality and color are similar to those in native sliced spinning, and investment and operating cost are low; the method is initiative for polyester pre-oriented yarn spun using recycled polyester bottle chips worldwide, economical and applicable prospect is promising, and the entire process is more reasonable and practical.

Description

technical field [0001] The invention relates to a production method for spinning polyester pre-oriented yarns from recycled polyester bottle flakes. Background technique [0002] There are mainly two methods for spinning polyester pre-oriented yarns from recycled bottle flakes in our country, namely physical method and chemical method. [0003] The physical method is that the bottle flakes are directly melt-spun with a screw after being dried. This method is backward in technology, and the moisture and PVC impurities contained in the recycled bottle flakes cannot be removed during the production process, and high-quality polyester pre-oriented yarns cannot be produced. The quality and batch number of bottle flakes are high, and the production of high-end products such as colored silk is difficult and impossible. [0004] The chemical method is used in the alcoholysis polymerization method, so that the uniform spinning degree of the molecular chain can reach the same require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D1/04D01D5/088D01D1/10D01D7/00
Inventor 刘伟
Owner ZHONGLANG ENVIRONMENTAL PROTECTION
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