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Preparation method of foaming plant fiber material for heavy-load packaging

A plant fiber material and plant fiber technology, applied in the field of foamed plant fiber material and its preparation, can solve the problems of high cost and difficulty in obtaining high-load plant foam, achieve low production cost, promote sustainable development, and avoid waste water Effect

Inactive Publication Date: 2018-01-19
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defect that the existing liquid foamed plant fiber relies on the support body, the cost is high and it is difficult to obtain high-load plant foam. Foaming agent, environmentally friendly production process, no support base material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method for a foamed plant fiber material for heavy-duty packaging, comprising the steps of:

[0024] (1) shortening the plant fibers and crushing them to a particle size of less than 1 cm to obtain powder; the plant fibers are Chinese fir fibers;

[0025] (2) Perform microwave treatment on the powder until the volume of the powder expands by 250%; the microwave treatment power is 300W, and the microwave treatment time is 4 minutes;

[0026] (3) Mix and disperse the powder and softener in an aqueous solution to make a gel and transfer it into a mold; the softener is a mixture of silicone oil and gelatin, silicone oil: gelatin = 1:1, powder and softener The mixing ratio is 3:2;

[0027] (4) Inject supercritical nitrogen into the mold for expansion and foaming;

[0028] (5) Mold closing, the pressure inside the mold is 2 MPa; and placed in an incubator at 65°C, heat-preserved and matured for 10 minutes, cooled, and air-dried to obtain the product. After te...

Embodiment 2

[0030] A preparation method for a foamed plant fiber material for heavy-duty packaging, comprising the steps of:

[0031] (1) Shorten the plant fibers and crush them until the particle size is less than 1cm to obtain powder; the plant fibers are pine fibers;

[0032] (2) Perform microwave treatment on the powder until the volume of the powder expands by 200%; the microwave treatment power is 400W, and the microwave treatment time is 3 minutes;

[0033] (3) Mix and disperse the powder and softener in an aqueous solution to make a gel and transfer it into a mold; the softener is a mixture of silicone oil, castor oil and gelatin, silicone oil and castor oil: gelatin = 3:1 , the mixing ratio of silicone oil and castor oil is arbitrary, and the mixing ratio of powder and softener is 5:2;

[0034] (4) Inject supercritical carbon dioxide into the mold for expansion and foaming;

[0035] (5) Mold closing, the pressure inside the mold is 3MPa; and placed in an incubator at 60°C, heat...

Embodiment 3

[0037] A preparation method for a foamed plant fiber material for heavy-duty packaging, comprising the steps of:

[0038] (1) shortening the plant fibers and crushing them to a particle size of less than 1 cm to obtain a powder; the plant fibers are straw fibers and bamboo fibers;

[0039] (2) Perform microwave treatment on the powder until the powder volume expands by 300%; the microwave treatment power is 200W, and the microwave treatment time is 5 minutes;

[0040] (3) Mix and disperse the powder and softener in an aqueous solution to make a gel and transfer it into a mold; the softener is a mixture of silicone oil, castor oil and gelatin, silicone oil and castor oil: gelatin = 1:3 , the mixing ratio of silicone oil and castor oil is arbitrary, and the mixing ratio of powder and softener is 3:4;

[0041] (4) Inject supercritical nitrogen into the mold for expansion and foaming;

[0042] (5) Mold closing, the pressure inside the mold is 1.5 MPa; and placed in an incubator ...

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Abstract

The invention relates to the technical field of foaming materials, in particular to a preparation method of a foaming plant fiber material for heavy-load packaging. The method comprises the followingsteps: (1) plant fibers are cut short and smashed until the particle size is smaller than 1 cm, and powder is obtained; (2) the powder is subjected to microwave processing until the volume of the powder increases by 200%-300%; (3) the powder and a softening agent are stirred, mixed and dispersed in an aqueous solution, and gel is prepared and transferred into a die; (4) supercritical gas is injected into the die for expanded foaming; (5) die assembly is performed, the die is subjected to thermally insulated aging in an incubator for 5-15 min, cooling and air drying are performed, and a productis obtained. The preparation method is simple, the raw materials are cheap and easily available, and production cost is low; a foaming agent is not used, so that the raw materials are all quite environmentally friendly, environmental pollution can be reduced, and sustainable development of the packaging industry is promoted; the prepared material has good impact resistance and high tensile strength and is quite applicable to heavy-load packaging materials.

Description

technical field [0001] The invention relates to the technical field of foaming materials, in particular to a foaming plant fiber material for heavy-duty packaging and a preparation method thereof. Background technique [0002] At present, the world's annual output of straw is about 2 billion tons, and the annual output of crop straw in my country is about 700 million tons, accounting for about 35% of the world's total straw output, ranking first in the world. According to the traditional treatment method, more than 50% of the straw is directly burned to fertilize the field or discarded directly, resulting in a large waste of agricultural resources and polluting the environment. [0003] Using plant fibers as raw materials to prepare packaging materials can solve the utilization of non-wood plant fiber resources and meet the needs of the country in building an energy-saving society. At present, the main foam substitute is pulp molded cushioning packaging material, which is w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08J3/28C08L97/02C08L83/04C08L89/00C08L91/00
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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