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Biomass material foamed plastic taking water as foaming agent and preparation method thereof

A technology of biomass materials and foamed plastics, which is applied in the field of biomass materials foamed plastics and its preparation, can solve the problems of production, failure of screw extruders, high brittleness of biodegradable cushioning packaging materials, etc., and achieve low price, The effect of saving petrochemical resources

Inactive Publication Date: 2009-09-02
WUHAN HUALI BIOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, biodegradable cushioning packaging materials produced from pure starch have high brittleness, and their performance is easily affected by the environment, so they cannot be widely used.
From the point of view of production process, many foaming materials produced by starch are produced by molding method or baking method. For example, Chinese patent CN1361048A and CN1052187C produce cushioning packaging materials by molding method, which cannot realize continuous industrialized large-scale production.
CN1563172A adopts thermal oxygen degradable polypropylene and starch blend as the main raw material, and is produced by the method of extrusion foaming, but needs to add physical or chemical foaming agent separately from the preparation inlet, and must use a special extrusion foaming machine can only be produced, and cannot be produced by ordinary screw extruders

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 70kg of corn starch to 20kg of water first, then add 20kg of polyethylene, 5kg of glycerin, 2kg of calcium stearate, 1kg of silane coupling agent, 1kg of sodium benzoate, 1kg of ethylene bisstearamide to high speed In the mixer, stir at 60-140°C for 3-30 minutes, mix uniformly, and cool down to discharge. Add the above-mentioned materials into a twin-screw extruder, and extrude and foam at 90-200°C. Control the temperature of the front section of the screw at 90°C, and gradually increase the temperature of the rear section of the screw to 140°C, and extrude and foam as soon as possible to prevent the material from staying in the high temperature zone for too long.

Embodiment 2

[0022] Add 60kg of corn starch to 20kg of water first, then add 30kg of polypropylene, 5kg of ethylene glycol, 2kg of calcium stearate, 1kg of silane coupling agent, 1kg of calcium carbonate, 1kg of ethylene bisstearamide In a high-speed mixer, stir at 60-140°C for 3-30 minutes, mix uniformly, and cool down to discharge. Add the above-mentioned materials into a twin-screw extruder, and extrude and foam at 90-200°C. Control the temperature of the front section of the screw at 120°C, and gradually increase the temperature of the rear section of the screw to 200°C, and extrude and foam as soon as possible to prevent the material from staying in the high temperature zone for too long.

Embodiment 3

[0024] Add 70kg of corn starch to 20kg of water, and then add 20kg of polystyrene, 5kg of sorbitol, 2kg of zinc stearate, 1kg of aluminate coupling agent, 1kg of sodium benzoate, and 1kg of polyethylene wax. In a high-speed mixer, stir at 60-140°C for 3-30 minutes, mix uniformly, and cool down to discharge. Add the above-mentioned materials into a twin-screw extruder, and extrude and foam at 90-200°C. Control the temperature of the front section of the screw at 100°C, and gradually increase the temperature of the rear section of the screw to 160°C, and extrude and foam as soon as possible to prevent the material from staying in the high temperature zone for too long.

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PUM

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Abstract

The invention relates to a preparation method of biomass material foamed plastic taking water as the foaming agent. The invention is economical and environmental-friendly, does not need a special foam extruder and a special method for adding foaming agent to material in advance, just needs an ordinary screw extruder to extrude foam. The biomass material foamed plastic has foamability of 5-50 times and the density of 0.01-0.1 g / cm<3> and can be used for various fields such as food packaging, industrial product packaging, and the like.

Description

Technical field [0001] The invention relates to a foamed packaging material of biomass material that can be used for food packaging and industrial product packaging, specifically, to a biomass material foamed plastic using water as a foaming agent and a preparation method thereof. Background technique [0002] At present, petroleum-derived polystyrene, polyvinyl chloride, polyurethane and other foams are widely used as cushioning packaging materials. These foam materials have the advantages of light weight and large volume, but they are difficult to rot and degrade, and are increasingly becoming global Pollution. [0003] The production of foamed materials from renewable resources is an effective way to solve energy and environmental problems. For example, the Eco-form series of loose fill developed by National Starch Chemical Co., Ltd. is made of high-amylose and deformed starch as raw materials. Although the material has good performance and can be completely biodegradable, it ...

Claims

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Application Information

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IPC IPC(8): C08J9/12C08L3/02C08L1/02C08L97/00C08L23/06C08L25/06C08L23/12
CPCC08J2423/00C08L23/06C08L23/0853C08L23/0869C08L1/02C08L23/10C08J2201/03C08L25/06C08K5/0008C08L97/00C08J9/0014C08J9/0061C08J9/125C08L3/02C08J2300/16
Inventor 张先炳汤运章张立斌任超
Owner WUHAN HUALI BIOLOGY CO LTD