Cold crystallization production technology for low-cost high heat-resistance polylactic acid product

A production process, polylactic acid technology, applied in the field of cold crystallization production process of low-cost high heat-resistant polylactic acid products, can solve the problems of difficulty in promoting the popularization and application of polylactic acid, high cost of polylactic acid nucleating agent, high cost of polylactic acid matrix, etc. , to achieve the effect of improving the quality and efficiency of cold crystallization, saving heating energy and improving efficiency

Inactive Publication Date: 2016-07-06
宁波高新区优合塑料制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polylactic acid is currently the only 100% biodegradable biomaterial of plant origin that is produced on a large scale in the world. It is mainly used in applications such as extrusion, injection molding, spinning, and double-drawn films; Low, heat distortion temperature is only about 60 ℃, it is difficult to meet the application requirements, and it is one of the bottlenecks restricting the development of polylactic acid industry
[0003] Even though the polylactic acid nucleating agent that has been developed can improve the heat resistance of polylactic acid injection molded products, because these processes involve long-term heat treatment in the mold, the prior art utilizes the cycle of polylactic acid in-mold crystallization injection molding In 90-150 seconds, yet the cost of the polylactic acid nucleating agent is very high and the processing cost remains high, and the cost of the polylactic acid matrix itself is relatively high relative to the cost of other common plastics. Therefore, after more than 10 years However, it is difficult to promote the rapid promotion and application of polylactic acid in downstream products, especially the large demand for disposable tableware, knives, forks and spoons

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) 80 parts by weight of polylactic acid matrix (produced by Natureworks, USA), 20 parts by weight of 3000-mesh talc powder; the polylactic acid matrix and talc powder were dried in an oven at a drying temperature of 55°C; after drying, twin-screw extruders were used to The granulation production line (Nanjing Keya 65 model) was mixed and granulated to obtain modified polylactic acid particles;

[0026] (2) The above-mentioned modified polylactic acid particles were subjected to cold mold injection processing of a disposable spoon with an injection molding machine (Haitian brand 200T injection molding machine) to obtain a disposable spoon.

[0027] (3) Use the halogen infrared electric heating oven (LC-5000) to carry out the cold crystallization process on the above-mentioned disposable spoon. The heating temperature of the halogen infrared electric heating oven is set at 120°C and the heating time is 150 seconds; , to obtain polylactic acid products, which are disposa...

Embodiment 2

[0030] (1) 90 parts by weight of polylactic acid matrix (produced by Zhejiang Hisun Biomaterials), 10 parts by weight of 3000-mesh talc powder; use an oven to dry the polylactic acid matrix and talc powder respectively, and the drying temperature is 55°C; The screw extrusion granulation production line (Nanjing Keya 65 model) performs mixing and granulation to obtain modified polylactic acid particles;

[0031] (2) Use an injection molding machine (Haitian brand 200T injection molding machine) to perform cold mold injection processing of disposable spoons on the above-mentioned modified polylactic acid particles to obtain disposable spoons;

[0032] (3) Use the halogen infrared electric heating oven (LC-5000) to carry out the cold crystallization process on the above-mentioned disposable spoon. The heating temperature of the halogen infrared electric heating oven is set at 120°C and the heating time is 150 seconds; , to obtain polylactic acid products, which are disposable pol...

Embodiment 3

[0035] (1) 60 parts by weight of polylactic acid matrix (produced by Zhejiang Hisun Biomaterials), 40 parts by weight of 3000-mesh talc powder; use an oven to dry the polylactic acid matrix and talc powder respectively, and the drying temperature is 58°C; The screw extrusion granulation production line (Nanjing Keya 65 model) performs mixing and granulation to obtain modified polylactic acid particles;

[0036] (2) Use an injection molding machine (Haitian brand 200T injection molding machine) to perform cold mold injection processing of disposable spoons on the above-mentioned modified polylactic acid particles to obtain disposable spoons;

[0037] (3) Use the halogen infrared electric heating oven (LC-5000) to carry out the secondary crystallization process on the above-mentioned disposable spoon. The heating temperature of the halogen infrared electric heating oven is set at 120°C and the heating time is 150 seconds; After the end, polylactic acid products are obtained, whi...

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Abstract

The invention discloses a cold crystallization production technology for a low-cost high heat-resistance polylactic acid product, and belongs to the field of polylactic acid product processing.The cold crystallization production technology comprises the steps that a polylactic acid matrix is filled with talcum powder to obtain modified polylactic acid; a common cold mold injection molding machine is used for carrying out injection molding on the modified polylactic acid, and a polylactic acid injection molding product is obtained; then an assembly line infrared oven is used for carrying out cold crystallization process operation on the polylactic acid injection molding product, and then the high temperature-resistance polylactic acid product is obtained.The cold crystallization production technology for the polylactic acid product has the advantages of being high in production efficiency and low in production cost.

Description

technical field [0001] The invention belongs to the field of polylactic acid product processing, in particular to a cold crystallization production process of low-cost and high-heat-resistant polylactic acid products. Background technique [0002] Polylactic acid is currently the only 100% biodegradable biomaterial of plant origin that is produced on a large scale in the world. It is mainly used in applications such as extrusion, injection molding, spinning, and double-drawn films; Low, heat distortion temperature is only about 60 ℃, difficult to meet the application requirements, is one of the bottlenecks restricting the development of polylactic acid industry. [0003] Even though the polylactic acid nucleating agent that has been developed can improve the heat resistance of polylactic acid injection molded products, because these processes involve long-term heat treatment in the mold, the prior art utilizes the cycle of polylactic acid in-mold crystallization injection mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/00C08L67/04C08K3/34B29C45/00
CPCC08J3/00B29C45/0001C08K3/34C08L2201/08
Inventor 姜笑君
Owner 宁波高新区优合塑料制品有限公司
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