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Food-grade expandable polystyrene particles for food containers and preparation method thereof

A technology for expandable polystyrene and food containers, which is applied to the production raw materials of food containers and their preparation fields, can solve the problems of narrow application scope, easy accumulation, and cannot be used as food packaging production raw materials, etc., and achieves the application scope. Wide and safe effect

Inactive Publication Date: 2013-01-30
无锡兴达泡塑新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, chemical raw materials such as styrene and bromine are toxic and harmful substances. If they are used as food packaging, toxic and harmful substances are easy to accumulate in the food, which will be harmful to human health.
Therefore, this flame-retardant expandable polystyrene particle can only be used as a raw material for industrial packaging or building materials, and cannot be used as a raw material for food packaging, and its scope of application is narrow.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Select 90 parts of styrene, 100 parts of desalted water, 1.5 parts of calcium phosphate, 0.3 parts of initiator, 5.0 parts of pentane and 0.3 parts of surface lubricant. The parts of each raw material are parts by weight. Wherein: the initiator is a non-benzene ring organic initiator; the surface lubricant is mixed according to the weight ratio of polyolefin: glyceryl stearate=7:3; the polyolefin is a powdered polyolefin; The conductivity of the desalted water is less than 0.8us / cm.

[0026] First pour the desalted water into the reactor, while stirring evenly, add calcium phosphate, styrene, and initiator in sequence, and heat the reactor at a heating rate of 0.6°C / min. When the temperature rises to 85°C, keep the constant temperature for 300 minutes to make the material form particles with a particle size of 30-50 mesh. The indicated lubricant is mixed according to the weight ratio of polyolefin: glyceryl stearate = 7:3, the polyolefin is powder polyolefin, and the ...

Embodiment 2

[0032] Select 100 parts of styrene, 115 parts of desalted water, 2.0 parts of calcium phosphate, 0.4 parts of initiator, 5.5 parts of pentane and 0.35 parts of surface lubricant. The parts of each raw material are parts by weight. Wherein: the initiator is a non-benzene ring organic initiator; the surface lubricant is mixed according to the weight ratio of polyolefin: glyceryl stearate=7:3; the polyolefin is a powdered polyolefin; The conductivity of the desalted water is less than 0.8us / cm.

[0033] First pour the desalted water into the reactor, and while stirring evenly, add calcium phosphate, styrene, and initiator in sequence, and heat the reactor at a heating rate of 0.9°C / min. When the temperature rises to 87°C, keep the constant temperature for 330 minutes to make the material form particles with a particle size of 30-50 mesh.

[0034] Afterwards, pentane was added, and the reactor was continued to be heated, so that the temperature of the reactor reached 125° C. and...

Embodiment 3

[0039] Select 110 parts of styrene, 130 parts of desalted water, 2.5 parts of calcium phosphate, 0.5 parts of initiator, 6.0 parts of pentane and 0.4 parts of surface lubricant. The parts of each raw material are parts by weight. Wherein: the initiator is a non-benzene ring organic initiator; the surface lubricant is mixed according to the weight ratio of polyolefin: glyceryl stearate=7:3; the polyolefin is a powdered polyolefin; The conductivity of the desalted water is less than 0.8us / cm.

[0040] First pour the desalted water into the reactor, and while stirring evenly, add calcium phosphate, styrene, and initiator in sequence, and heat the reactor at a heating rate of 1.2°C / min. When the temperature rises to 90°C, keep the constant temperature for 360 minutes to make the material form particles with a particle size of 30-50 mesh.

[0041] Afterwards, pentane was added, and the reactor was continued to be heated, so that the temperature of the reactor reached 130° C. and ...

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Abstract

The invention discloses food-grade expandable polystyrene particles and a preparation method thereof. The food-grade expandable polystyrene particles are prepared from styrene, desalted water, calcium phosphate, pentane, an initiating agent and a surface lubricant by mixing and reacting. The food-grade expandable polystyrene particles can be used as industrial packing products and production raw materials of food packing products, and have a wide application range. The food-grade expandable polystyrene particles are suitable to be used as production raw materials of food containers such as coffee cups, drink cups, ice cream cups and instant noodle bowls.

Description

technical field [0001] The invention relates to a production raw material for a food container and a preparation method thereof. Specifically, it is the raw material and preparation method used to produce food containers such as coffee cups, beverage cups, ice cream cups, and instant noodle bowls. Background technique [0002] As we all know in the food processing industry, most of the containers used to hold food such as coffee, beverages, ice cream and instant noodles are paper products. Although paper products can be used to make food containers such as coffee, beverages, ice cream and instant noodles, the production process of paper products will generate a lot of sewage, which will pollute the environment and damage the forest environment, which is not conducive to ecological construction. Therefore, it is necessary to find other food packaging materials to replace traditional paper food packaging materials. [0003] The use of expandable polystyrene particles to make...

Claims

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Application Information

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IPC IPC(8): C08J9/16C08L25/06C08F112/08
Inventor 华啸威杨琪吴均项汛郭庆陈海燕
Owner 无锡兴达泡塑新材料股份有限公司
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