Foaming CPET sheet material and method for preparing same

A technology of sheet material and foaming agent, applied in the field of foamed CPET sheet and its preparation, can solve the problems of deep container shape and hinder application, etc., and achieve the effect of high rigidity of side wall and high impact strength

Active Publication Date: 2009-09-30
SICHUAN YIBIN WULIANGYE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This hinders applications such as baking containers which require relatively deep container shapes

Method used

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  • Foaming CPET sheet material and method for preparing same
  • Foaming CPET sheet material and method for preparing same
  • Foaming CPET sheet material and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0056] The preparation method of foamed CPET sheet of the present invention specifically comprises the following steps:

[0057] A, 0.1 to 30 parts of ethylene-acrylate-glycidyl methacrylate terpolymer or acrylate substances with core-shell structure, 0.1 to 10 parts of highly active multifunctional substances, 0.3 to 10 parts of crystallization nucleating agent and Mix 10-100 parts of carrier resin, extrude and granulate at the melting temperature of carrier resin to make foaming aid;

[0058] B. Dry the foaming aid at 60°C to 120°C for 4 hours;

[0059] C. 100 parts of PET, add 0.1-40 parts of foaming aid in step B and 0.1-10 parts of foaming agent, mix well and extrude.

[0060] Toner can be added to the foaming aid to adjust the color of the sheet to make it more attractive. The toner is mainly used in industry such as carbon black and titanium dioxide, and other colors can also be used, but the used The color powder must have high heat resistance to avoid discoloration ...

Embodiment 1

[0069] The preparation of embodiment 1 foaming aid

[0070] Use LDPE resin as the carrier resin, the MI value of LDPE is 5g / 10min, and dry at 60-80°C for more than 2 hours. After drying, 100 parts of LDPE resin, 5 parts of caprolactam substances shown in formula 3, and acrylates with core-shell structure 100 parts of material (such as the product model EXL8619 of RohmHaas Company), 5 parts of lithium stearate, 10 parts of polyethylene glycol and 20 parts of carbon black are mixed in a high-speed mixer for 8 to 10 minutes, and then used a twin-screw extruder at 160 Extrude at ~210°C, cut into pellets, dry, cool to below 60°C and pack for later use.

Embodiment 2

[0071] The preparation of embodiment 2 foaming aids

[0072] Use the sodium salt of ethylene-methacrylic acid copolymer as the carrier (MI value 5g / 10min), the carrier resin is first vacuum-dried at 60-70°C for 6-8 hours, 100 parts of the dried carrier resin and 10 parts of triphenyl phosphite , 80 parts of ethylene-acrylate-glycidyl methacrylate (such as LOTADER GMA AX8840 from Total Company), 5 parts of PEG-400-diethylhexanol, and 20 parts of titanium dioxide were mixed in a high-speed mixer for 8 to 10 minutes, Then use a twin-screw extruder to extrude at 170-240°C, pelletize, dry, cool to below 60°C, and pack for use.

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Abstract

The invention belongs to high molecule material technology field, especially a foaming CPET sheet material and a method for preparing the same. The invention provides a forming CPET sheet material, which is produced by uniformly mixing 100 portions of PET, 0.1-40 portions of blowing promoter and 0.1-5 portions of foaming agent, extruding and forming. The blowing promoter is prepared by uniformly mixing 0.1-30 portions of ethylene-acrylic ester-glyceryl methacrylate tercopolymer or acrylic ester with core-shell structure, 0.1-10 portions of polyfunctional group substance with high activity, 0.3-10 portions of crystal nucleating agent and 10-100 portions of carrier resin. The inventive foamed CPET sheet material has the finished product density range of 0.60-0.95 g/cm[3] and high impact strength, is suitable for producing dual purpose food trays for freezing temperature preservation and microwave/oven heating, and the deep chamber containers in the medicine and electric product.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a foamed CPET sheet and a preparation method thereof. Background technique [0002] Home Meal Replacement (Home Meal Replacement) is widely used in the North American food market, including pre-prepared meat, which is easy to buy and eat. An important feature of this type of food is that there are few things to prepare, and it is not necessary to take it out of the container when eating, and it can be prepared in a few minutes in a small portion or in a small amount that is enough for a small family. Therefore, the tray is required to be used as a heat-resistant container in an electric oven, which can withstand high temperatures up to 230°C, such as toast, cheese, baked rice and steak. [0003] Adding an organic or inorganic crystallization nucleating agent to PET will crystallize to form CPET during extrusion. When the polymer crystallinity reaches the 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L23/00C08L69/00C08L77/00C08L23/08C08L33/08C08K5/09C08K5/353C08K5/524B29C47/00
Inventor 邹耀邦苏湘牟小波杨文斌陈秀娟周立权
Owner SICHUAN YIBIN WULIANGYE GROUP
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