PET (Polyethylene Terephthalate) foam material and manufacturing method thereof

A technique for foaming materials and manufacturing methods, which is applied in the field of PET foaming materials and its manufacturing, can solve the problems that materials cannot be recycled directly, PET material degradation, material loss, etc., achieve uniform cell size, reduce degradation, and reduce heat loss. Degradation effect

Pending Publication Date: 2021-08-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, PET foam materials are prone to thermal degradation and hydrolysis at high temperatures.
Whether it is intermittent foaming or extrusion foaming to prepare PET foaming materials, it needs to go through two high-temperature processing processes of motherboard molding and foaming, which will easily cause the degradation of PET materials
In addition, the current foaming process is to prepare sheets and plates. For materials with special shape requirements, a large amount of cutting is required. After cutting, the materials cannot be directly recycled, and the loss of materials is very serious.

Method used

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  • PET (Polyethylene Terephthalate) foam material and manufacturing method thereof
  • PET (Polyethylene Terephthalate) foam material and manufacturing method thereof
  • PET (Polyethylene Terephthalate) foam material and manufacturing method thereof

Examples

Experimental program
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Effect test

preparation example 1

[0048] Repeat the embodiment 5 in the Chinese patent whose publication number is CN 108976427 A to prepare PET granules. In this preparation example, each raw material is the same as the embodiment 5. Wherein, the PET resin used is a linear PET resin (full name polyparaphenylene Ethylene glycol diformate, purchased from Shanghai Jinshan Petrochemical Co., Ltd.), the density is 1.37g / cm 3 , the melting point is 254°C, the intrinsic viscosity is 0.65Dl / g, and the melt volume flow rate is 30cm 3 / 10min, the loss factor is 20.

preparation example 2

[0050] Similar to Preparation Example 1, only the epoxy chain extender wherein The amount of 4368 acrylate polymer was replaced by 0.6 parts by weight to prepare PET particles with a loss factor of 1.

preparation example 3

[0052] Similar to Preparation Example 1, only the epoxy chain extender wherein The amount of 4368 acrylate polymer was replaced by 1.5 parts by weight to prepare PET particles with a loss factor of 0.6.

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Abstract

The invention provides a PET foam material and a manufacturing method thereof. The manufacturing method of the PET foaming material comprises the step of directly carrying out supercritical foaming on PET particles with the loss factor of 1 +/-0.2. The invention further provides the PET foaming material manufactured by the manufacturing method. According to the manufacturing method of the PET foaming material, the high-temperature processing process of mother board forming can be omitted, degradation of the PET material is reduced, and compared with a PET foaming material with the same density in the prior art, the compression strength of the PET foaming material disclosed by the invention is higher.

Description

technical field [0001] The invention relates to the field of polymer foaming, in particular to a PET foaming material and a manufacturing method thereof. Background technique [0002] Polyethylene terephthalate (PET) is currently the thermoplastic polyester with the largest output and the cheapest price. It has high temperature resistance and high strength and is widely used in synthetic fibers, films, polyester plastic bottles and other fields. Due to its good mechanical properties, in recent years, PET foam materials have also shown broad application prospects, such as food packaging, building materials, microwave containers, inner panels of refrigerators, automobiles, aerospace, wind power, construction, etc. PET polyester foam material has the advantages of light weight, high specific strength, high rigidity, good electrical insulation, heat insulation and sound insulation. [0003] At present, the preparation of PET polyester foam materials with supercritical fluids at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C44/02B29C44/34B29C44/60
CPCB29C44/02B29C44/3403B29C44/3461B29C44/60
Inventor 赵玲陈弋翀刘涛许志美奚桢浩宗原胡冬冬
Owner EAST CHINA UNIV OF SCI & TECH
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