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Method for preparing chemically tackified regenerated PET (polyethylene terephthalate) and single filament

A chemical and monofilament technology, applied in the field of the preparation of recycled PET and monofilaments, can solve the problems of low intrinsic viscosity and difficulty in making high-strength monofilaments, etc., and achieve the effects of improving intrinsic viscosity, simple method and increasing strength.

Inactive Publication Date: 2020-01-10
NANTONG NTEC MONOFILAMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the low intrinsic viscosity of the existing polyethylene terephthalate recycled materials, generally around 0.55dl / g, it is difficult to make high-strength monofilaments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Send the recycled material of polyethylene terephthalate into the twin-screw extruder for melt extrusion, add the first auxiliary agent and the second auxiliary agent to react during the melt extrusion process, and the reaction time is 30 seconds to 600 seconds (Example: 30 seconds, 200 seconds, 600 seconds); the screw diameter of the twin-screw extruder is 36~94mm, and the temperature in zone 1~9 of the twin-screw is 240°C, 250°C, 260°C, 260°C, 260°C, 260°C , 265°C, 265°C, 270°C, the screw extruder is vacuumed.

[0020] The first auxiliary agent and the second auxiliary agent are respectively composed of the following components by mass:

[0021] Polydimethylsiloxane 71%~99% (example 71%, 90%, 99%), isocyanate 29%~1% (example 29%, 10%, 1%).

[0022] The amount of the first auxiliary agent and the second auxiliary agent is 0.3%~0.5% of the raw material amount in step (1) (for example, 0.3%, 0.4%, 0.5%).

[0023] After twin-screw extrusion, the chemically thickened rec...

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PUM

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Abstract

The invention discloses a method for preparing chemically tackified regenerated PET (polyethylene terephthalate) and a single filament. When the chemically tackified regenerated PET is prepared, a recycled material of polyethylene terephthalate is fed into a double-screw extruder for melting extrusion, a first aid and a second aid are added to implement a reaction in the melting extrusion process,the reaction time is 30-600 seconds, the diameter of screw rods of the double-screw extruder is 36-94mm, temperatures of zones 1-9 of the double screw rods are 240 DEG C, 250 DEG C, 260 DEG C, 260 DEG C, 260 DEG C, 260 DEG C, 265 DEGC, 265 DEG C and 270 DEG C, and the double-screw extruder is subjected to vacuuming treatment. The method is simple and convenient, the specific viscosity of the regenerated PET can be effectively improved, and in addition, the strength of the single filament prepared from the regenerated PET can be greatly improved.

Description

technical field [0001] The invention relates to a method for preparing chemically thickened regenerated PET and monofilament. Background technique [0002] The existing recycled polyethylene terephthalate is difficult to make high-strength monofilament due to its low intrinsic viscosity, generally around 0.55dl / g. Contents of the invention [0003] The purpose of the present invention is to provide a kind of chemical thickening regenerated PET and monofilament preparation method that can effectively improve the intrinsic viscosity of regenerated polyethylene terephthalate. [0004] Technical solution of the present invention is: [0005] A chemically thickened regenerated PET is characterized in that it is prepared by the following method: [0006] (1) Ingredients: Use the following raw materials in mass percentages: [0007] Polyethylene terephthalate recycled material 100%; [0008] (2) Send the above raw materials into the twin-screw extruder for melt extrusion, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L83/04C08K5/29D01F6/92D01F1/10B29B9/06B29C48/40B29C48/505B29C48/92B29C69/02B29C48/05B29K67/00
CPCB29B9/06B29K2067/003B29C48/0018B29C48/05B29C48/40B29C48/505B29C48/92B29C2948/92704C08L67/02C08L2203/12C08L2207/20D01F1/10D01F6/92C08L83/04C08K5/29
Inventor 马海燕司淼
Owner NANTONG NTEC MONOFILAMENT TECH CO LTD