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PET sheet production process

A production process and sheet technology, applied in the field of PRT sheet production technology, can solve the problems of reduced transparency, shallow blister depth, and low sheet strength, so as to improve antistatic ability, deepen blister depth, and expand the scope of use Effect

Inactive Publication Date: 2021-07-06
韶关市盛益塑胶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a PET sheet production process to solve the problems of uneven thickness and low strength of the current PET sheet produced by the existing PET sheet production process proposed in the above background technology. , the uneven thickness of the sheet can easily lead to crystallization of the product, reduce the transparency, and the use effect is poor. The problem of applicability of PET sheet

Method used

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  • PET sheet production process

Examples

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Embodiment 1

[0028] This example provides a kind of technical scheme: a kind of PET sheet material production process, production process comprises the following steps:

[0029] S1, PET sheet raw material crystallization process, including the following sub-steps:

[0030] S11. Dedusting the PET sheet raw material to ensure the purity of the PET sheet;

[0031] S12. Quantitatively screen the PET sheet raw material according to a certain ratio to reduce the difference and distinction of raw materials;

[0032] S13. Place the PET particles in the raw material in the crystallization tower for heating and crystallization, and use the stirring blade to stir the PET particles at a low speed to prevent the raw materials from agglomerating, promote the regular arrangement of the PET molecules, and increase the glass transition temperature of the PET particles. At the same time, under high temperature conditions, water can hydrolyze PET particles to achieve degradation, thereby reducing the degree...

Embodiment 2

[0045] S1, PET sheet raw material crystallization process, including the following sub-steps:

[0046] S11. Dedusting the PET sheet raw material to ensure the purity of the PET sheet;

[0047] S12. Quantitatively screen the PET sheet raw material according to a certain ratio to reduce the difference and distinction of raw materials;

[0048] S13. Place the PET particles in the raw material in the crystallization tower for heating and crystallization, and use the stirring blade to stir the PET particles at a low speed to prevent the raw materials from agglomerating, promote the regular arrangement of the PET molecules, and increase the glass transition temperature of the PET particles. At the same time, under high temperature conditions, water can hydrolyze PET particles to achieve degradation, thereby reducing the degree of adhesion and avoiding the occurrence of adhesion in the subsequent drying process, resulting in blockage of the hopper.

[0049] S2. PET sheet raw materia...

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Abstract

The invention discloses a PET sheet production process. The PET sheet production process comprises the following steps that S1, a PET sheet raw material crystallization process is conducted, wherein PET sheet raw materials are quantitatively screened according to a certain proportion, and the screened PET sheet raw materials are placed in a crystallization tower for heating crystallization; S2, a PET sheet raw material drying process is conducted; S3, a PET sheet extrusion molding process is conducted; and S4, a PET sheet cooling molding process is conducted, wherein PET melt is subjected to transverse and longitudinal stretching by a three-roller calender through an upper roller, a middle roller and a lower roller; S5, a PET sheet anti-static treatment process is conducted, wherein the surface of a PET sheet is evenly coated with transparent conductive oil, and drying is conducted; S6, a PET sheet winding process is conducted, wherein the PET sheet is conveyed into a winding device by using a traction roller; and S7, a PET sheet packaging process is conducted. According to the PET sheet production process, a plurality of temperature zones are arranged in a screw extruder, and the temperature is relatively constant, so that the thickness of the extruded PET sheet is relatively uniform, the quality of the sheet is improved, meanwhile, the strength of the sheet can be improved, and the application range of the sheet is expanded.

Description

technical field [0001] The invention relates to the technical field of PRT sheet production technology, in particular to a PET sheet production technology. Background technique [0002] With the development of society and the advancement of technology, people can realize the needs of human daily life through a series of processing operations on raw materials. Among them, the blister sheet is a kind of plastic processing technology material. After the sheet is softened, it is vacuumed Adsorbed on the surface of the mold for cooling and forming, and because of the bright colors and eye-catching effects of the blister sheet, it is widely used in plastic packaging, lighting and other industries. The blister sheet mainly includes PVC, PET, PP, PS and Flocking sheet, gold-plated sheet and anti-static sheet based on this, among them, PET sheet has good properties such as hard quality, good toughness, high strength, bright surface, environmental protection and non-toxic, and meets t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/01B29B13/06B29B13/00B29C48/07B29C48/25B29C48/28B29C71/00
CPCB29D7/01B29B13/065B29B13/00B29C48/07B29C48/0018B29C48/25B29C48/28B29C71/0009
Inventor 王美晒
Owner 韶关市盛益塑胶制品有限公司