Polylactic acid/thermoplastic starch extrusion blow molding film and its producing method and application

Abstract

The invention discloses a polylactic acid / thermoplastic starch extrusion blown film, a relative production method and an application. The invention mixes polylactic acid, the copolymer fatty group-aromatic polyester, thermoplastic starch, flexibilizer, nucleating agent, lubricant, anti-oxidant, reinforcing agent and anti-ultraviolet agent into a twin-screw extruder, at suitable operation temperature and screw rod rotation speed, to be extruded and granulated, and uses extrusion blowing method to produce polylactic acid / thermoplastic starch extrusion blown film product. The inventive polylactic acid / thermoplastic starch extrusion blown film can be used as packaging film, clingfilm, one-time film and agricultural film. And the production method has simple process, easy operation, low cost, degradable property, easy treatment and reduced white pollution.

Description

technical field [0001] The invention belongs to the field of biodegradable polymer materials, in particular to a polylactic acid / thermoplastic starch extruded blown film and its production method and application. Background technique [0002] There are more and more materials such as packaging film bags, plastic wrap bags, disposable film bags (such as garbage bags, tablecloths, cleaning bags), agricultural films (mulch film, covering film, shed film) and other materials used in human daily life. Most of them are petroleum-based plastics. Although they are cheap, they have poor degradability and become a source of pollution that damages the environment after use. [0003] When environmental protection became a hot spot of social concern, more and more degradable plastic products began to emerge. However, most of the current degradable products are not perfect and failed to achieve the expected effect. At present, the degradable masterbatches made at home and abroad include:...

AI Technical Summary

Problems solved by technology

However, there is no successful preparation of high-strength biodegradable polymer blown film materials composed of polylactic acid and starch or modified starch.