Multi-time crystallization equipment for fully-degradable plastic product by taking PLA (Polylactic Acid) as main base material

Abstract

The invention discloses multi-time crystallization equipment for a fully-degradable plastic product by taking PLA (Polylactic Acid) as the main base material, and the thermal deformation temperature of the fully-degradable plastic product with PLA as the main base material is increased through multi-time crystallization process operation of the multi-time crystallization equipment. The multi-time crystallization equipment comprises a first area, a second area, a third area, a fourth area, a fifth area and a sixth area which are connected through a conveying belt made of a Teflon gauze. Heating pipes are arranged over the first area, the third area and the fifth area to finish the heating process. Refrigerating units are arranged above the second area, the fourth area and the sixth area, multiple times of cooling processes are completed, the purpose of multiple crystallization of the plastic product is achieved, and the heat deformation temperature of the fully-degradable plastic product with PLA as the main base material is increased.

Description

technical field [0001] The invention relates to the technical field of PLA production, in particular to a device for multiple crystallization of fully degradable plastic products with PLA as the main base material. Background technique [0002] Polylactic acid, also known as polylactide, is a polyester polymer obtained by polymerizing lactic acid as the main raw material. It is a new type of biodegradable material. Polylactic acid has good thermal stability and good solvent resistance, and can be processed in various ways, such as extrusion, spinning, biaxial stretching, and injection blow molding. In addition to being biodegradable, products made of polylactic acid have good biocompatibility, gloss, transparency, hand feeling and heat resistance. [0003] In the process of production, processing and production of fully degradable plastic products based on polylactic acid, the plastic products are transported to each area for heating through the conveyor belt, and after the...

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Problems solved by technology

[0003] In the process of production, processing and production of fully degradable plastic products based on polylactic acid, the plastic products are transported to each area for heating through the conveyor belt, and after the heating treatment, the blower is used to cool them down. The method is to cool the plastic products so that they can be crystallized, thereby improving the temperature resistance of the products. However, the existing technology uses a blower to cool it down. The use of the blower belongs to the cooling of the material, but the blower cannot be used for cooling, and the blower does not have temperature control. effect, resulting in limited cooling efficiency for plastic products, and thin-walled products are prone to deformation

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