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Toughening process for high-tensile-strength recycled polyester sheet

A technology of high tensile strength and recycled polyester, which is applied in the field of toughening technology of polyester sheets, can solve the problems of sheet tensile and impact performance reduction, limit the use range of sheets, etc., and achieve enhanced impact and tensile performance effect

Active Publication Date: 2011-07-13
YANGZHOU SANXING PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Its shortcoming is that: the addition of PET recycled materials causes a decomposition reaction to occur in the extrusion molding process of sheet production, and ethylene terephthalate is decomposed into small molecular substances such as acid and alcohol, thereby making the sheet Tensile and impact properties are reduced, thereby limiting the range of use of the sheet

Method used

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  • Toughening process for high-tensile-strength recycled polyester sheet

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Experimental program
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Effect test

Embodiment 1

[0030] A high tensile strength recycled polyester sheet toughening process, the steps are as follows:

[0031] The weight percent is 47% PET chip, 50% PET reclaimed material, 3% thickening agent to prepare material, and described thickening agent is made up of the following each composition and the percentage that each composition accounts for thickening agent is: p-benzene 50% ethylene glycol diformate, 2% ethylene glycol isophthalate, 30% polyol acid, 17.5% polyol ester, 0.5% stearate;

[0032] Fully mix the prepared raw materials in a low-speed mixer, and input them into the crystallization tower for crystallization and drying. The crystallization temperature is 150°C, the drying temperature is 178°C, and the drying time is 8 hours. The dried materials are transported to the extruder For extrusion and plasticization, the extruder is divided into six zones, and the temperature of each zone is: Zone 1: 260°C, Zone 2: 265°C, Zone 3: 265°C, Zone 4: 265°C, Zone 5: 265 ℃, six zo...

Embodiment 2

[0035] The weight percentage is 53% PET chips, 44% PET reclaimed material, 3% tackifier, and the tackifier is composed of the following components and the percentage of each component in the tackifier is: p-benzene 53% ethylene glycol diformate, 2% ethylene glycol isophthalate, 14.5% polyol acid, 30% polyol ester, 0.5% stearate;

[0036] Fully mix the prepared raw materials evenly in a low-speed mixer, and input them into a crystallization tower for crystallization and drying. The crystallization temperature is 150°C, the drying temperature is 181°C, and the drying time is 9 hours.

Embodiment 3

[0038] The weight percentage is 56% PET chips, 41% PET reclaimed material, 3% tackifier, and the tackifier is composed of the following components and the percentage of each component in the tackifier is: p-benzene 55% ethylene glycol diformate, 2% ethylene glycol isophthalate, 20.5% polyol acid, 22% polyol ester, 0.5% stearate;

[0039] Fully mix the prepared raw materials evenly in a low-speed mixer, and input them into a crystallization tower for crystallization and drying. The crystallization temperature is 150°C, the drying temperature is 184°C, and the drying time is 10 hours.

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Abstract

The invention discloses a toughening process for a high-tensile-strength recycled polyester sheet in the production field of the polyester sheet. The recycled polyester sheet is manufactured from 47-75wt% of PET (polyester) slices, 18-50wt% of PET recycled materials and 3-7wt% of tackifier through the steps of mixing, crystallizing and drying, extruding and plasticizing, calendaring and shaping, cooling and polishing and cutting. By adding the tackifier to the raw materials for production, the polymer molecular weight generated in the extruding and plasticizing process is increased under certain reaction conditions, the production process is changed into bidirectional stretching from unidirectional stretching, and the force reaction is in mesh stretching, thereby reinforcing the impact and tensile property of the sheet. The obtained sheet can be applied to the food, medical and packaging industries.

Description

technical field [0001] The invention relates to a polyester sheet production process, in particular to a polyester sheet toughening process. Background technique [0002] Since the 1950s, polyethylene terephthalate (referred to as PET, polyester, the same below) has been industrially applied to synthetic fibers (polyester), because of its excellent physical, chemical and mechanical properties, making it non-fiber The uses are also becoming more and more extensive. The non-fiber applications of PET mainly include polyester film, packaging containers (polyester bottles), engineering plastics, coatings, adhesives, etc. [0003] With the rapid development of the polyester industry, more and more polyester wastes are produced and used, which has become one of the main culprits causing "white pollution". [0004] In 2009, the annual output of polyester in my country has exceeded 20 million tons. If 3-5% of the waste generated during the production of polyester and its products is...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08G63/20B29C47/92B29C48/92
CPCB29C48/0022B29C48/92B29C2948/92704B29C2948/92895
Inventor 戴庆丰
Owner YANGZHOU SANXING PLASTIC
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