PLA has many applications, which can be used in many fields such as extrusion, injection molding, film drawing, spinning, etc. The details are as follows:

1. Extrusion grade resin

Extrusion-grade resin is the main market application of PLA. It is mainly used in the packaging of fresh fruits and vegetables in large supermarkets. This type of packaging has become an important member of the European market chain; secondly, it is used for packaging of electronic products that promote safety, energy saving and environmental protection. on. In these applications, PLA's high transparency, high gloss, high rigidity and other advantages are vividly reflected, and it has become the dominant direction of PLA applications. In addition, the application of extrusion-grade resin in horticulture has also begun to gain attention, and it has been applied in fields such as slope greening and sandstorm control.

However, the extrusion processing of PLA is not easy, it is only suitable for processing on some advanced PET extrusion molding machines, and the thickness of the extruded sheet is generally only in the range of 0.2-1.0mm. The processing process is particularly sensitive to moisture content and processing temperature. During extrusion processing, the moisture content is generally required to be less than 50PPM, which puts forward new requirements for the drying system and temperature control system of the equipment.

2. Injection molding resin

In the market application of PLA injection molding, modified resins are more widely used. Although pure PLA has the advantages of high transparency and high gloss, its shortcomings such as hard and brittle, difficult to process and heat-insensitive have affected its application in injection molding. Of course, the chemical and plastic industries have been working hard to solve these problems.

For example, using BPM-500 as an additive can improve the impact strength of PLA; adding a small amount of a vinyl copolymer called Biomax Strong can improve the toughness of PLA; blending with another biodegradable resin PHA can improve some of PLA Performance; In addition, Japanese scientists have developed a heat-resistant PLA resin added with pulp. Polylactic acid products modified by the above methods sacrifice transparency, but improve the defects of polylactic acid in heat resistance, flexibility, impact resistance, etc., and increase the ease of processing, so the scope of application is also Has been expanded.