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Foam sheet with excellent thermoformability and method for preparing same

A foamed sheet and isosorbide technology, which is applied to the foamed sheet and its preparation field, can solve the problems of poor heat insulation effect, high price, low morphological change rate and the like, and achieves the effect of excellent thermoformability

Active Publication Date: 2020-08-25
HUVIS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the contrary, the disadvantage of this foamed product is that harmful substances will be detected at high temperature
As a non-foaming container, a product made of heat-stable polypropylene in a film form is used. This non-foaming container has the advantages of low morphological change rate at high temperature and no harmful substances will be detected, but there are Disadvantages of high price and poor heat insulation effect
[0003] The representative product that is most commonly used as a disposable heat-resistant container is a bowl noodle container. Previously, a polystyrene foam container was used, but it was replaced by a paper container due to the detection of harmful substances at high temperatures, but there was a disadvantage of being expensive

Method used

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  • Foam sheet with excellent thermoformability and method for preparing same
  • Foam sheet with excellent thermoformability and method for preparing same

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preparation example Construction

[0039] And, the present invention can provide the preparation method of foamed sheet, is characterized in that, comprises: the step of preparing polyester resin by acid component and diol component; And make the prepared resin foam and prepare foamed sheet step, the acid component is one or more selected from terephthalic acid, isophthalic acid and phthalic acid, and the diol component is selected from ethylene glycol, 2-methyl-1,3 -one or more of propylene glycol, neopentyl glycol, 1,2-propanediol, diethylene glycol and isosorbide, relative to the overall repeat unit, the prepared polyester resin contains 80mol% to 99mol% derived from The repeating unit of phthalic acid and ethylene glycol, when analyzed by differential scanning calorimetry, does not have crystallization under the conditions of the first heat treatment from 110°C to 180°C at a heating rate of 20°C / m peak.

[0040] Specifically, in the step of preparing the polyester resin from an acid component and a diol co...

Embodiment 1

[0062] Terephthalic acid and ethylene glycol were charged into an ester reaction tank, and a normal polymerization reaction was performed at a temperature of 258° C. to prepare about 96% of a polyethylene terephthalate polymer (PET oligomer). The prepared polyethylene terephthalate was mixed with 2-methyl-1,3-propanediol at a content ratio of 2 mol%, and an esterification reaction catalyst was added to carry out the esterification reaction at a temperature of 250±2°C. . Afterwards, a polycondensation reaction catalyst was added to the obtained reaction mixture, and the reaction tank was adjusted so that the final temperature and pressure in the reaction tank reached 280±2° C. and 0.1 mmHg, respectively, and polycondensation was carried out to prepare a copolyester resin.

[0063]Based on 100 parts by weight of the polyester resin, 0.5 parts by weight of pyromellitic dianhydride, 0.5 parts by weight of talc and 0.1 parts by weight of Irganox (IRG 1010) were mixed, and heated at...

Embodiment 2

[0065] A foam sheet was prepared in the same manner as in Example 1 except that 2-methyl-1,3-propanediol was mixed at a content ratio of 8 mol%.

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Abstract

The present invention relates to a foam sheet of a polyester resin comprising repeating units derived from an acid component and a diol component and a method for preparing same, and it is advantageous in that excellent thermoformability is obtained by adjusting crystallinity due to comprising various acid components and diol components in a polyester resin polymer.

Description

technical field [0001] The invention relates to a foamed sheet with excellent thermoformability and a preparation method thereof. Background technique [0002] Products used as general food containers are divided into foaming type and non-foaming type. As a foamed product, polystyrene and foaming gas are mixed and extruded. Since this product can maintain a thick thickness, it has advantages such as shape retention, heat insulation, and price advantages. On the contrary, the disadvantage of this foamed product is that harmful substances can be detected at high temperatures. As a non-foaming container, a product made of heat-stable polypropylene in a film form is used. This non-foaming container has the advantages of low morphological change rate at high temperature and no harmful substances will be detected, but there are The disadvantages of high price and poor heat insulation effect. [0003] The representative product that is most commonly used as a disposable heat-res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/22C08J5/18C08L67/02C08G63/183B32B5/18B32B5/24B32B5/02B32B27/06B32B27/36
CPCB32B5/02B32B5/18B32B5/24B32B27/06B32B27/36C08G63/183C08J5/18C08J9/22C08L67/02
Inventor 李光熙咸镇洙许娓金宇镇崔钟汉河相勳
Owner HUVIS CORP