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Starch foaming packaging inner foamed component and preparation method thereof

A starch and foaming agent technology, applied in the field of foaming materials, can solve serious problems such as difficulty in controlling the foaming process of starch materials, affecting the environmental protection performance of products, etc., and achieve the effect of mild foaming conditions and controllable processing technology

Inactive Publication Date: 2020-02-18
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the packaging industry, there is a huge amount of jade in the packaging box (special-shaped foam accessories used to support the product inside the packaging box), and most of them use foamed EVA as the main material. In order to save costs, most of the materials used are recycled materials. With the addition of foaming and processing aids, the volatile organic odor in the product is very serious, which affects the environmental protection performance of the product
As a new natural material, starch is very suitable for the preparation of such packaging inner products, but the foaming process of starch materials is difficult to control, so it is necessary to develop a starch foaming material suitable for the processing and manufacturing of special-shaped packaging inner products and craft

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example provides a method for preparing jade in starch foam packaging. The mass parts of raw materials used are as follows: moisture content 0.5%, starch with a particle size of 100 mesh: 40 parts, PVA: 40 parts, glycerin: 6 parts, molecular weight Be 600 polyethylene glycol: 4 parts, sodium bicarbonate: 1 part, the steps of preparation method are as follows:

[0026] S1. After mixing the above raw materials in the high mixer for 15 minutes, let stand for 24 hours;

[0027] S2. Put the mixture in the step S1 into the internal mixer and stir, and the temperature of the internal mixer is 100°C;

[0028] S3. Press the stirred material into a material block after weighing;

[0029] S4. Transfer the material block to the cavity of the molding mold. The temperature of the molding mold is 160°C. After the mold is closed, it is shaped and foamed for 3 minutes, and then water is passed to cool and shaped to obtain a starch foam packaging inner jade.

[0030] The density o...

Embodiment 2

[0032] This example provides a method for preparing inner jade in starch foam packaging. The mass parts of raw materials used are as follows: starch with a moisture content of 0.8% and a particle size of 80 mesh: 50 parts, PVA: 35 parts, glycerin: 8 parts, molecular weight 500 polyethylene glycol: 3 parts, AC blowing agent: 3 parts, the steps of the preparation method are as follows:

[0033] S1. After mixing the above raw materials in the high mixer for 15 minutes, let stand for 24 hours;

[0034] S2. Put the mixture in the step S1 into the internal mixer and stir, and the temperature of the internal mixer is 135° C.;

[0035] S3. Press the stirred material into a material block after weighing;

[0036] S4. Transfer the material block to the cavity of the molding mold. The temperature of the molding mold is 140°C. After the mold is closed, it is set and foamed for 3 minutes, and then water is passed to cool and set the shape to obtain a starch foam packaging inner jade.

[...

Embodiment 3

[0039] This example provides a method for preparing jade in starch foam packaging. The mass parts of raw materials used are as follows: moisture content 0.5%, starch with a particle size of 150 mesh: 32 parts, PVA: 30 parts, glycerin: 5 parts, molecular weight 400 polyethylene glycol: 6 parts, sodium bicarbonate: 2 parts, AC blowing agent: 2 parts, the steps of the preparation method are as follows:

[0040] S1. After mixing the above raw materials in the high mixer for 15 minutes, let stand for 24 hours;

[0041] S2. Put the mixture in step S1 into a mixer and stir, and the temperature of the mixer is 120°C;

[0042] S3. Press the stirred material into a material block after weighing;

[0043] S4. Transfer the material block to the cavity of the molding mold. The temperature of the molding mold is 150°C. After the mold is closed, it is set and foamed for 3 minutes, and then water is passed to cool and set the shape to obtain a starch foam packaging inner jade.

[0044] The ...

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Abstract

The invention discloses a starch foaming packaging inner foamed component which is prepared from the following raw materials in parts by mass: 30-50 parts of starch, 30-50 parts of PVA, 5-8 parts of glycerol, 3-6 parts of polyethylene glycol and 1-4 parts of a foaming agent. According to the preparation method, the starch, a plasticizer and the adhesive PVA are introduced, a fully-degradable starch composite material suitable for production of the special-shaped packaging inner foamed component is prepared through a chemical foaming method, the foaming molding process is adopted, and the density of the prepared foamed inner foamed component is 0.6-0.9 g / cm < 3 >. The foaming conditions are mild, the treatment process is controllable, and no adverse effect is caused to the environment.

Description

technical field [0001] The invention relates to the technical field of foaming materials, and more specifically, to a starch foam packaging inner shell and a preparation method thereof. Background technique [0002] Starch is a renewable and recyclable green material from natural plants. It can not only be used as food for human consumption, but also widely used in the fields of chemical industry and new materials to prepare various composite materials. Because of its excellent biodegradable properties, starch is usually used as a filler to prepare thermoplastic bio-based composites with high bio-carbon content, which are widely used in disposable products. In the current environment where petrochemical resources are increasingly scarce and white pollution is becoming more and more serious. people's attention. With the development of technology and technology, starch is gradually being used as a completely degradable material, which is widely used in various industrial and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L29/04C08L71/02C08K5/053C08J9/08C08J9/10
CPCC08J9/0023C08J9/0061C08J9/08C08J9/103C08J2203/02C08J2203/04C08J2303/02C08J2329/04C08J2403/02C08J2429/04C08J2471/02
Inventor 曾广胜江太君孟聪胡灿陈一
Owner HUNAN UNIV OF TECH
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