Polylactic acid-plant fiber composite degradable material

Abstract

The invention relates to a polylactic acid-plant fiber composite degradable material which is mainly prepared by the following steps: catalyzing high polymer starch polylactic acid by a catalyst at high speed and high temperature to change the molecular weight, thereby obtaining a plastic four-way-tensile polylactic acid master batch; grinding agricultural waste or residual waste after agricultural processing at high speed by utilizing the physical principle of cooling to obtain powder with required particle size, sterilizing at high temperature, and carrying out emulsification polymerization with starch to obtain a plant fiber filler; and finally, mixing the polylactic acid master batch, plant fiber filler and modifier according to required proportion, polymerizing at high temperature (190-210 DEG C) to obtain the biodegradable composite raw material applicable to various natural, non-toxic, green and environment-friendly products.

Description

technical field

[0001] The invention relates to a composite material of polylactic acid plant fiber, especially a decomposable raw material that can replace traditional petrochemical products and wooden boards and other green environmental protection products. Background technique

[0002] Petrochemical plastic products are widely used in different industries, so whether they are industrial products, consumer products or daily necessities, they can be seen everywhere. Although they bring a lot of convenience to industry or life, but because plastic products are exposed to high temperature That is, it is easy to release toxic substances, and it is not easy to be decomposed. When it is incinerated, it will release toxic gases and pollute the air, causing great harm to humans and the ecological environment. Therefore, with the increase of traditional petrochemical products, environmental pollution has reached the point of no delay. Although relevant businesses have recycled pla...

Examples

Embodiment Construction

[0038] Please refer to Fig. 1, which is a schematic diagram of the manufacturing process of a polylactic acid plant fiber composite decomposable material according to the present invention. into, its manufacture method is as follows:

[0039] a. The high-molecular starch polylactic acid 11 is catalyzed by the catalyst 12 at high speed and high temperature, so that its molecular weight is changed into plasticity, and the polylactic acid masterbatch 10 can be stretched in four directions;

[0040] b. Use agricultural waste (such as corn stalks, cotton stalks, millet stalks) or waste left over from agricultural processing (such as rice husks, cassava flour), and grind them into the required particle size and mesh at a high speed by cooling the physical principle Plant fiber powder 21, then carry out high-temperature sterilization and emulsification polymerization with starch 22 to make plant fiber filler 20;

[0041] c. mix and mix polylactic acid masterbatch 10, plant fiber fil...

technical field

[0001] The invention relates to a composite material of polylactic acid plant fiber, especially a decomposable raw material that can replace traditional petrochemical products and wooden boards and other green environmental protection products. Background technique

[0002] Petrochemical plastic products are widely used in different industries, so whether they are industrial products, consumer products or daily necessities, they can be seen everywhere. Although they bring a lot of convenience to industry or life, but because plastic products are exposed to high temperature That is, it is easy to release toxic substances, and it is not easy to be decomposed. When it is incinerated, it will release toxic gases and pollute the air, causing great harm to humans and the ecological environment. Therefore, with the increase of traditional petrochemical products, environmental pollution has reached the point of no delay. Although relevant businesses have recycled pla...

Examples

Embodiment Construction

[0038] Please refer to Fig. 1, which is a schematic diagram of the manufacturing process of a polylactic acid plant fiber composite decomposable material according to the present invention. into, its manufacture method is as follows:

[0039] a. The high-molecular starch polylactic acid 11 is catalyzed by the catalyst 12 at high speed and high temperature, so that its molecular weight is changed into plasticity, and the polylactic acid masterbatch 10 can be stretched in four directions;

[0040] b. Use agricultural waste (such as corn stalks, cotton stalks, millet stalks) or waste left over from agricultural processing (such as rice husks, cassava flour), and grind them into the required particle size and mesh at a high speed by cooling the physical principle Plant fiber powder 21, then carry out high-temperature sterilization and emulsification polymerization with starch 22 to make plant fiber filler 20;

[0041] c. mix and mix polylactic acid masterbatch 10, plant fiber fil...