plastic products Everywhere, where plastic Bags can be said to be our most common plastic products What is the LDPE plastic bag?
LDPE plastic bag is a low-density polyethylene plastic bag, is through the polymerization process of ethylene polymerization and then blown into low-density polyethylene plastic bags.
LDPE plastic bag process
LDPE plastic bags are generally made by blow molding and casting. The polished polyethylene plastic bags are uniform in thickness, but are due to the higher prices and are rarely used. Blown polyethylene bags are made of blow-molded PE particles blow Presses Blown from the low cost, so the most widely used.
LDPE plastic bag is a translucent, shiny, soft texture of the plastic bag, with excellent chemical stability, heat sealing, water resistance and moisture resistance, resistance to freezing, boiled. The main drawback is the oxygen Poor barrier, commonly used in composite soft package Material of the inner thin film, but also the most widely used, the largest amount of a Plastic Packaging Film, accounting for about 40% of plastic packaging film consumption.
As the polyethylene molecules do not contain polar groups, and high crystallinity, low surface free energy, therefore, LDPE plastic bags of poor printing performance, poor adhesion to ink and adhesives, so before printing and composite Requires surface treatment.
LDPE plastic bag recycling value is low, in the course of the process in addition to scattered in the city streets, tourist areas, water bodies, roads and railways on both sides of the 'visual pollution', it also has potential hazards. Plastic structure is stable, Natural microbial degradation, in the natural environment for a long time does not separate.This means that waste plastic waste, if not recycled, will become pollutants in the environment for a long time and continue to accumulate, will cause great harm to the environment.