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Full-biodegradable high-strength polylactic acid-based injection molding special material and preparation method thereof

A polylactic acid-based, high-strength technology, applied in the field of degradable polymer materials, can solve the problems of consumption, low energy consumption, and low equipment dependence.

Inactive Publication Date: 2021-07-30
苏州中达航材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a fully biodegradable high-strength polylactic acid-based injection molding special material and its preparation method in order to overcome the deficiencies of the prior art. The preparation method has simple process, low energy consumption, little dependence on equipment, and high preparation efficiency. It is suitable for industrial production; the fully biodegradable high-strength polylactic acid-based special injection molding material produced by this preparation method has excellent heat resistance, good mechanical properties, high stiffness, and good degradability; under compostable conditions, it can be completely degraded to generate carbon dioxide And water, using carbon dioxide-based PPC raw materials at the same time, consumes carbon dioxide, responds to the national carbon neutral initiative, and effectively solves the global "white pollution" problem

Method used

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  • Full-biodegradable high-strength polylactic acid-based injection molding special material and preparation method thereof

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preparation example Construction

[0020] Another object of the present invention is to provide a preparation method of the fully biodegradable high-strength polylactic acid-based injection molding special material, characterized in that it includes the following steps: mixing the raw materials uniformly by weight to obtain a mixed material, and then The mixed material is added into a twin-screw base material machine for melt blending, extrusion, cooling and granulation in sequence to obtain a fully biodegradable high-strength polylactic acid-based special material for injection molding.

[0021] Preferably, the temperature of the barrel of the twin-screw extruder is 160-180°C, and the temperature of the die head is 170°C.

[0022] Preferably, the screw speed of the twin-screw extruder is 400-600 rpm, and the screw length-diameter ratio L / D is 52:1.

[0023] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: the present invent...

Embodiment 1

[0026] This example provides a fully biodegradable high-strength polylactic acid-based special injection molding material, which is characterized in that it is made from the following raw materials in parts by weight: 5 parts of carbon dioxide-based PPC, 60 parts of PLA, 20 parts of PBAT, and a dispersant. 0.2 part, ADR44680.1 part, 0.1 part of lubricant, 3 parts of filler.

[0027] The filler is ultrafine talc; the particle size of the filler is 5000 mesh; the lubricant is a mixture of erucamide and stearic acid amide in a mass ratio of 1:1; the dispersant is ethylene Distearic acid amide.

[0028] Another object of the present invention is to provide a preparation method of the fully biodegradable high-strength polylactic acid-based injection molding special material, characterized in that it includes the following steps: mixing the raw materials uniformly by weight to obtain a mixed material, and then The mixed material is added to a twin-screw base material machine for me...

Embodiment 2

[0031] This example provides a fully biodegradable high-strength polylactic acid-based special material for injection molding. Its formula and preparation method are basically the same as those in Example 1. The difference is that it is made from the following raw materials in parts by weight: carbon dioxide-based PPC 6 parts, PLA 63 parts, PBAT 22 parts, dispersant 0.22 parts, ADR4468 0.15 parts, lubricant 0.15 parts, filler 3.5 parts.

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Abstract

The invention provides a full-biodegradable high-strength polylactic acid-based injection molding special material. The material is characterized by being prepared from the following raw materials in parts by weight: 5 to 10 parts of carbon dioxide-based PPC, 60 to 70 parts of PLA, 20 to 25 parts of PBAT, 0.2 to 0.3 part of a dispersing agent, 0.1 to 0.3 part of ADR4468, 0.1 to 0.3 part of a lubricating agent and 3 to 5 parts of a filler. The invention also discloses a preparation method of the full-biodegradable high-strength polylactic acid-based injection molding special material. The full-biodegradable high-strength polylactic acid-based injection molding special material disclosed by the invention is excellent in heat resistance, good in mechanical property, high in stiffness and good in degradability; and under the composting condition, the material can be completely degraded to generate carbon dioxide and water, meanwhile, a carbon dioxide-based PPC raw material is used, carbon dioxide is consumed, the proposal of national carbon neutralization is responded, and the problem of global white pollution is effectively solved.

Description

technical field [0001] The invention relates to the technical field of degradable polymer materials, in particular to a fully biodegradable high-strength polylactic acid-based special material for injection molding and a preparation method thereof. Background technique [0002] With the enhancement of my country's economic strength and the improvement of people's living standards, people pay more and more attention to their health and the protection of the environment. There are also higher and higher requirements for disposable hotel utensils such as toothbrushes, combs and other plastic products. The preparation materials of traditional disposable hotel utensils are mostly ordinary PP plastics, which can meet the basic performance requirements of disposable hotel utensils, and their use greatly facilitates people's lives. However, ordinary PP plastics are non-degradable polymer materials, which are difficult to decompose under natural conditions, causing long-term and dee...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L69/00
CPCC08L67/04C08L2201/06C08L2205/03C08L2201/08
Inventor 王秋波
Owner 苏州中达航材料科技有限公司
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