APET/PETG composite material and its production technology

A composite sheet material and production process technology, applied in other household appliances, applications, household appliances, etc., can solve the problems of high cost and high price, achieve the effects of reducing dosage, enhancing impact and tensile properties, and reducing costs

Active Publication Date: 2011-09-28
YANGZHOU SANXING PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is a polycondensation product of three monomers of terephthalic acid (TPA), ethylene glycol (EG) and 1,4-cyclohexanedimethanol (CHDM) by transesterification. Compared with PET, it has more 1,4 -Cyclohexanedimethanol comonomer, therefore, the performance of PETG is quite different from that of PET and PCT; it has outstanding thermoforming performance, toughness, weather resistance and excellent chemical resistance, and is environmentally friendly and economical. Its shortcomings Because: at present, there are only two companies in the world, Eastman of the United States and SK of South Korea, with relatively mature technologies. The PETG used in China is all dependent on imports. Because of its high price, it is generally not used alone. It is mostly used as a surface heat seal for three-layer composite or two-layer composite. Layer, its disadvantage is: because the source of PETG slices is all dependent on imports, the cost is too high

Method used

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  • APET/PETG composite material and its production technology
  • APET/PETG composite material and its production technology
  • APET/PETG composite material and its production technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] like figure 1 Shown, a kind of production technology of APET / PETG composite sheet comprises the following steps:

[0042] step one

[0043] Prepare raw materials according to the weight ratio of 80% APET slices, 15% PETG slices and 5% toughening agent; the toughening agent is composed of the following components (accounting for toughening agent weight %): ethyl terephthalate 50% glycol ester, 2% ethylene glycol isophthalate, 30% polyol acid, 17.5% polyol ester, 0.5% stearate;

[0044] step two

[0045] Unit 1 includes mixer, mill, granulator, drying cylinder 1 and extruder 1, etc. Stir and mix the toughening agent and PETG slices in the mixer evenly, and then input the blended abrasive into the mill Grinding, the ground material is sent to the granulator for granulation, and then the pellets are input into the drying cylinder for drying, and the dried material is transported to the extruder for extrusion and plasticization;

[0046] step three

[0047] Unit 2 inclu...

Embodiment 2

[0053] According to the weight ratio: 82% APET slices, 15% PETG slices and 3% toughening agent are prepared; the toughening agent is composed of the following components (accounting for the weight of the toughening agent): terephthalic acid 53% ethylene glycol ester, 2% ethylene glycol isophthalate, 14.5% polyol acid, 30% polyol ester, 0.5% stearate; the drying temperature in unit 1 is 175°C, and the drying time is 6 hours; the crystallization temperature in unit two is 150°C, the crystallization time is 4.5 hours, the drying temperature is 165°C, and the drying time is 7 hours.

Embodiment 3

[0055] According to the weight ratio: 83% APET slices, 15% PETG slices and 2% toughening agent are prepared as raw materials, and the toughening agent is composed of the following components (accounting for the weight of the toughening agent): terephthalic acid 55% ethylene glycol ester, 2% ethylene glycol isophthalate, 20.5% polyol acid, 22% polyol ester, 0.5% stearate; the drying temperature in unit 1 is 185°C, and the drying time is 6 hours; the crystallization temperature in unit two is 150°C, the crystallization time is 5 hours, the drying temperature is 165°C, and the drying time is 8 hours.

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Abstract

The invention discloses an APET / PETG composite material and its production technology, which belongs to the filed of composite material production technology. The composite material is produced by processes of stirring, milling, granulating, crystallizing, drying, extruding, cooling and glazing, drawing and cutting a combination of 80 to 90% of APET slice, 8 to 15% of PETG slice and 2 to 5% of flexibilizer, flexibilizer is added in the production process for increasing polymer molecular weight generated in the processes of extruding and plasticizing, unidirectional tension becomes bidirectional tension in the production process, the reaction of the tension direction stretches in net shape, therefore the impacting and stretching performance of the material can be enhanced; after decreasingof the thickness of a produced composite material PETG slice layer, the heat combination performance and the processing effect at a low temperature can be still reached to that of material while the thickness of the PETG slice layer is 20%, which enables the dosage of PETG slice and the cost to be greatly reduced. The material provided by the invention can be used in the foodstuff, medical and packaging industries.

Description

technical field [0001] The invention relates to a composite sheet and its production process, in particular to an APET / PETG composite sheet and its production process. Background technique [0002] APET is a plastic-absorbing material. Its chemical name is: non-crystalline polyethylene terephthalate composite sheet. It is a thermoplastic environmental protection plastic product. Widely used in food, medical, packaging and other fields, and domestically has a relatively mature APET production technology, the price of APET sheets is much lower than that of PETG sheets. [0003] PETG is a transparent plastic and an amorphous copolyester. The comonomer commonly used in PETG is: 1,4-cyclohexanedimethanol (CHDM), the full name is: polyethylene terephthalate -1,4-cyclohexanedimethanol ester. It is a polycondensation product of three monomers of terephthalic acid (TPA), ethylene glycol (EG) and 1,4-cyclohexanedimethanol (CHDM) by transesterification. Compared with PET, it has more...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K5/12C08K5/09C08K5/103C08K5/101B29D7/01
Inventor 戴庆丰
Owner YANGZHOU SANXING PLASTIC
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