Starch-based foaming packing material precursor, starch-based foaming packing material and preparation methods

A packaging material and starch-based technology, applied in the field of starch-based foam packaging materials, can solve the problems of bulky, high cost, and space-consuming foam packaging materials, and achieve convenient use of microwave ovens, cost savings, and reduced storage and transportation space. Effect

Inactive Publication Date: 2015-12-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned shortcomings and deficiencies of the prior art, one of the purposes of the present invention is to provide a starch-based foam packaging material precursor, which solves the problems of large volume, large space occupation and high cost when the foam packaging material is transported and stored.

Method used

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  • Starch-based foaming packing material precursor, starch-based foaming packing material and preparation methods
  • Starch-based foaming packing material precursor, starch-based foaming packing material and preparation methods
  • Starch-based foaming packing material precursor, starch-based foaming packing material and preparation methods

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Embodiment 1

[0041] The starch-based foam packaging material of the present embodiment comprises the following steps:

[0042] (1) Weighing materials: hydroxypropyl starch 83wt%, polyvinyl alcohol 7wt%, glycerin 5wt%, talcum powder 2wt%, water 3wt%;

[0043] (2) Put 83wt% of hydroxypropyl starch, 7wt% of polyvinyl alcohol and 2wt% of talcum powder into a high-speed mixer, and pre-mix for 5min at a rate of 70r / min at room temperature;

[0044] (3) Add glycerin 5wt% and water 3wt% and blend at 60°C at a rate of 120r / min for 25min to ensure uniform mixing;

[0045] (4) Open twin-screw extruder, add plasticizer in the pretreatment material that step (3) obtains, carry out extrusion granulation:

[0046] (41) The twin-screw extruder used in this implementation is as figure 1 As shown, the screw is provided with a kneading section 3 , a kneading section 4 , a compression section 5 and a feeding section 6 . Turn on the twin-screw extruder and set the seven-stage temperature of the twin-screw e...

Embodiment 2

[0054] The starch-based foam packaging material of the present embodiment comprises the following steps:

[0055] (1) weighing materials: hydroxypropyl starch 86wt%, polyvinyl alcohol 4wt%, sorbitol 8wt%, calcium carbonate 1wt%, water 1wt%;

[0056] (2) Put 83wt% of hydroxypropyl starch, 7wt% of polyvinyl alcohol and 2wt% of talcum powder into a high-speed mixer, and pre-mix for 8min at a rate of 200r / min at room temperature;

[0057] (3) Add glycerin 8wt% and water 1wt% and blend at 50°C for 20min at a rate of 200r / min to ensure uniform mixing;

[0058] (4) Open twin-screw extruder, add plasticizer in the pretreatment material that step (3) obtains, carry out extrusion granulation:

[0059] (41) Turn on the twin-screw extruder and set the temperature of the seven sections of the twin-screw extruder to be the temperature respectively: the temperature of the first section 7 of the screw is 65°C, the temperature of the second section of the screw is 85°C, and the temperature of...

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Abstract

The invention discloses a preparation method of a starch-based foaming packing material precursor. The preparation method comprises steps as follows: (1) materials comprising 83wt%-86wt% of hydroxypropyl starch, 4wt%-8wt% of polyvinyl alcohol, 5wt%-10wt% of a plasticizer, 1wt%-2wt% of a nucleating agent and the balance of water are weighed; (2), the hydroxypropyl starch, the polyvinyl alcohol and the nucleating agent are put in a high-speed mixer and premixed at the normal temperature; (3), the plasticizer and water weighed in the step (1) are added to the materials, the mixture is blended, and a pretreatment material is obtained; (4), the pretreatment material is subjected to extrusion and granulation: (5), granules obtained in the step (4) are dried until the water content ranges from 13% to 15%, and the starch-based foaming packing material precursor is obtained. The invention further discloses a method for preparing a starch-based foaming packing material by adopting the starch-based foaming packing material precursor. The problems that the foaming packing material is large in size and occupies a lot of space during transportation and storage and the cost is high are solved.

Description

[0001] invention technical field [0002] The invention relates to a starch-based foam packaging material, in particular to a starch-based foam packaging material precursor, a starch-based foam packaging material and a preparation method. Background technique [0003] The foam plastics currently on the market not only pollute the environment, but also consume a lot of non-renewable resources such as petroleum, and the cost of post-use treatment is even several times higher than the production cost. Therefore, the development and promotion of renewable and degradable foam packaging materials will be an effective solution, which is in line with the trend of green packaging industry. At the same time, starch is an abundant renewable resource in nature, which has the advantages of inexhaustible supply, low price and short regeneration cycle. The development and development of starch-based degradable foam packaging materials has great application potential and huge economic value,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/08C08L29/04C08L71/02C08K5/053C08K3/34C08K3/26C08J9/228B29C47/92B29B9/06B65D65/38B29C48/92
CPCY02W90/10
Inventor 刘宏生孟令晗
Owner SOUTH CHINA UNIV OF TECH
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