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Biodegradable plastic and production method thereof

A technology for biodegrading plastics and plastics, applied in the field of new materials, can solve the problems of incomplete combustion, pollute the air, reduce the strength of plastics, etc., achieve the effects of good flexibility and strength, simple preparation method, and prevent coating cracking

Active Publication Date: 2013-10-09
BIJIE SHANGKUN PLASTIC PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Recycling and reuse: This is the most ideal treatment method, but 100% recycling and utilization cannot be achieved, otherwise there will be no "white pollution"
[0005] 2. Burial: Polymer plastic waste is not easy to decompose and occupies a large amount of landfill space. The more waste there is in the city, the more difficult it is to obtain landfill space in the suburbs.
[0006] 3. Incineration: Traditional plastic waste products emit black smoke when burned, pollute the air, produce toxic gases such as hydrogen chloride, formaldehyde, and polychlorinated biphenyls, burn incompletely, and leave black sticky colloids, which are attached to the wall of the incinerator. Block heat conduction and affect the service life of the incinerator
However, there are still deficiencies in this type of biodegradable plastics, mainly because the use of these filling materials reduces the strength of the plastics. In addition, the degradation rate is greatly affected by the type and quantity of microorganisms in the soil environment, and the degradation rate is still relatively slow.
Therefore, the application of this degradable plastic is greatly limited

Method used

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  • Biodegradable plastic and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Raw materials: 60 kg of polyethylene resin, 28 kg of lignocellulose, 11.7 kg of 1200 mesh zeolite powder, and 0.3 kg of cellulose degrading enzyme (endo-β-1,4-glucase).

[0025] Preparation method: add the cellulose degrading enzyme to 1 liter of ethanol and mix well, then add the zeolite powder to the ethanol solution and mix uniformly, and de-alcoholize under reduced pressure at a temperature of 40°C to keep the cellulose degrading enzyme in the pores of the zeolite. The lignocellulose, polyethylene resin, and zeolite powder are mixed, then granulated by a granulator to make biodegradable plastic, and then the biodegradable plastic is blown into a film 1.

[0026] The lignocellulose, zeolite powder, and cellulose degrading enzyme were replaced with starch of equal weight to make a biodegradable plastic, and a comparative film 1 of the same specification was also made.

[0027] The strength test of the film 1 and the comparative film 1 and the comparative degradation experime...

Embodiment 2

[0029] Raw materials: 65 kg of polyethylene resin, 25 kg of lignocellulose, 9.8 kg of 1200 mesh zeolite powder, and 0.2 kg of cellulose degrading enzyme (β-glucosidase).

[0030] Preparation method: add cellulose degrading enzyme to 1 liter of ethanol and mix well, then add zeolite powder to the ethanol solution and mix well, de-ethanol under reduced pressure at 40°C, then mix lignocellulose, polyethylene resin and zeolite powder , And then granulate into biodegradable plastic through a granulator, and then blow the biodegradable plastic into a film 2.

[0031] The zeolite powder was replaced with an equal weight of talc powder to make a biodegradable plastic, and a comparative film 2 with the same specifications as the film 2 was also made. A strength test and a comparative degradation experiment in a soil with 5% water content show that the tensile strength of the biodegradable plastic in Example 2 is basically equivalent to that of the comparative film 2, and the degradation tim...

Embodiment 3

[0033] Raw materials: 63 kg of polyethylene resin, 20 kg of lignocellulose, 16.9 kg of 1200 mesh zeolite powder, and 0.1 kg of cellulose degrading enzyme (β-glucosidase).

[0034] Preparation method: add cellulose degrading enzyme to 1 liter of ethanol and mix well, then add zeolite powder to the ethanol solution and mix well, de-ethanol under reduced pressure at 40°C, then mix lignocellulose, polyethylene resin and zeolite powder , And then granulated by a granulator to make biodegradable plastic, and then blow the biodegradable plastic into a film 3.

[0035] The cellulose degrading enzyme was replaced with polyethylene to make a biodegradable plastic, and a comparative film 3 of the same specification was also made. A strength test and a comparative degradation experiment in a soil with 5% water content showed that the tensile strength of the biodegradable plastic in Example 3 was basically equivalent to that of the comparative film 3, and the degradation time was shortened by 1...

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Abstract

The invention discloses a biodegradable plastic. The biodegradable plastic is characterized in that lignocelluloses and zeolite powder are scattered in polyethylene resin, and cellulose degradation enzymes are arranged in pores of the polyethylene resin. The biodegradable plastic is prepared by steps: adding biodegradable enzymes into ethanol and stirring; mixing the zeolite powder with ethanol solution at the step one, and removing the ethanol; mixing the lignocelluloses, the polyethylene resin and the zeolite powder; and using a granulator for granulating. Compared with starch type biodegradable plastics, the biodegradable plastic has the advantages of high strength and easiness in degradation.

Description

Technical field [0001] The invention relates to the field of new materials, in particular to a biodegradable plastic. Background technique [0002] With the development of petrochemical industry technology, plastics and their products occupy an increasingly important position in people's lives. However, while plastic products benefit mankind, with the large-scale manufacture and use of plastic products, it also brings new troubles to people. The most prominent problem is "white pollution" because plastics are difficult to decompose in the natural environment. [0003] Traditional plastic waste disposal methods include: [0004] 1. Recycling and reuse: This is the most ideal treatment method, but it cannot be recycled and used 100%, otherwise there will be no "white pollution". [0005] 2. Buried: Polymer plastic waste is not easy to decompose and occupies a lot of burial space. The more garbage in the city, the more difficult it is to obtain burial space in the suburbs. Therefore, m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L1/02C08K7/26
Inventor 谷尚昆
Owner BIJIE SHANGKUN PLASTIC PROD CO LTD
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