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Degradable bio-based foamed buffer material and preparation method thereof

A buffer material, bio-based technology, applied in the chemical field, can solve the problems of environmental pollution, low buffer performance, high density, etc., to increase compatibility, excellent tensile strength and elastic modulus, and improve tensile strength. and the effect of elastic modulus

Inactive Publication Date: 2018-01-09
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is used in various industries such as home appliances, industrial instruments, glass, ceramics, etc. However, due to the high density of its products, the cushioning performance is far lower than that of EPS foam materials, and is affected by the structure and processing of molds. At present, only small packaging liners can be produced. The packaging liner for making large-scale products is still EPS foam material, and the waste water in the production process has caused great pollution to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Super finely pulverize 60Kg of plant fiber to 2500 mesh, add 0.7kg of methionine to mix, stir and mix vigorously in a high mixer at 80°C, and perform surface modification treatment for 1 hour to obtain 60.7kg of modified plant fiber, add water Appropriate amount to keep the water content at 14%;

[0030] (2) 70.7kg of modified plant fiber, cornstarch 5kg, polypropylene 5kg, nano-calcium carbonate 3kg, composite crosslinking agent 3kg, composite foaming agent 3kg, calcium stearate 3kg, liquid paraffin 3kg, glycerin 5kg are added in In a high mixer at 80°C, vigorously stir and mix to obtain a homogeneous bulk material;

[0031] (3) Add the pre-mixed homogeneous material into the twin-screw extruder, set the screw temperature at 70-170°C, set according to the temperature difference of 20°C in each heating zone, and control the temperature of the first half of the screw at a lower temperature , the temperature in the second half is at a higher temperature, so that the ...

Embodiment 2

[0033] (1) Super finely pulverize 75Kg of corn stalk fibers to 2500 mesh, add 2.25kg of methionine and mix them in a high mixer at 80°C, vigorously stir and mix evenly, and perform fiber surface modification treatment for 1 hour to obtain modified corn stalk fibers 77.25kg, add appropriate water to keep the water content at 14%;

[0034] (2) Add 77.25kg of modified corn stalk fiber, 5kg of starch, 10kg of polyethylene, 5kg of nano-calcium carbonate, 3kg of composite crosslinking agent, 3kg of composite foaming agent, 3kg of zinc stearate, and 3kg of liquid paraffin into the high-mixing In the machine at 80°C, vigorously stir and mix to obtain a homogeneous bulk material;

[0035] (3) Extrude and granulate the stirred homogeneous material with a twin-screw extruder at a temperature of 80-110° C. to obtain pre-expanded pellets;

[0036] (4) Weigh the pre-expanded pellets and put them into the mold. Set the temperature of the upper mold at 175°C, the temperature of the lower mol...

Embodiment 3

[0038] (1) Super finely pulverize 78kg of straw fibers to 2000 mesh, add 1.56kg of methionine and mix them in a high-mixer at 80°C, vigorously stir and mix evenly, and perform fiber surface modification treatment for 1 hour to obtain modified straw fibers 79.56kg, add appropriate water to keep the water content at 14%;

[0039](2) With modified straw fiber 79.56kg, starch 8kg, polypropylene 7kg, nano-calcium carbonate 3kg, composite crosslinking agent 2kg, composite foaming agent 2kg, barium stearate 2kg, liquid paraffin 2kg, add in high mixing In the machine at 80°C, vigorously stir and mix to obtain a homogeneous bulk material;

[0040] (3) Extrude and granulate the stirred homogeneous material with a twin-screw extruder at a temperature of 80-110° C. to obtain pre-expanded pellets;

[0041] (4) Put the pre-expanded pellets into the mold after weighing, set the temperature of the upper mold at 175°C, the temperature of the lower mold at 195°C, and the pressure at 9MPa. Afte...

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Abstract

The invention discloses a degradable bio-based foamed buffer material and a preparation method thereof. The material is made from a biomass raw material, polyolefin, a nucleating agent, a foaming agent, a plasticizer, a cross-linking agent, a lubricant, a heat stabilizer and water through uniform mixing and extrusion or moulding puffed foaming, wherein the plasticizer and cross-linking agent are made by compounding one or severable auxiliary agents. The prepared material has the biodegradation rate reach no less 60%, reaches the standard of a degradable plastic, and has the density in a rangeof 0.01-0.15 g / cm<3>. The material is light in weight and good in elasticity, can replace a foaming material, such as polyethylene (EPE) and polystyrene (EPS), and can be used for packaging food, cosmetics, artware, industrial goods, and the like. The material is simple in preparation process, is economic and eco-friendly, and doesn't require special complicated equipment. The material is made byonly foaming a specially-treated material through a common screw extruder or moulding.

Description

technical field [0001] The invention relates to a bio-based foaming buffer material and a preparation method thereof, in particular to a degradable bio-based foaming buffer material which can be used for food, cosmetics and industrial product packaging and a preparation method thereof, belonging to the technical field of chemical industry. Background technique [0002] At present, various non-renewable resources in the world are facing a shortage. In order to solve the contradiction between resources and the environment, countries around the world have put the main research direction on green materials. Through reasonable research and development of renewable resources, they can be used in various functions. approach or surpass materials developed from non-renewable resources. [0003] In the field of cushioning packaging, the cushioning material used earlier was corrugated cardboard, but due to shape and other reasons, the cushioning performance is not particularly ideal, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L3/02C08L23/12C08L23/06C08L67/04C08L67/02C08K13/02C08K3/26C08K5/098C08K5/09C08J9/08C08J9/10
Inventor 罗凡袁启兵李一平施媛媛
Owner HOHAI UNIV
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