Is polyolefin plastic shopping bags as the main raw material, add the appropriate packaging material made of other substances. Polyolefin currently used mainly for polyethylene (PE), commonly known as soft rubber, the main products include low density polyethylene, or LDPE (LDPE), high density polyethylene and low-pressure polyethylene (HDPE) and linear low density polyethylene (LLDPE) and metallocene Polyethylene (mLLDPE) four categories. In order to reduce its costs, in recent years most companies have joined the 30% around made of calcium carbonate-filled plastic shopping bags, plastic shopping bags because of the dump does not release toxic gases when burned.
Just issued national standards for plastic shopping bags, plastic shopping bags, divided into the following three categories:
Common plastic shopping bags--with polyolefin and packing as a material, this class without degradation of plastic shopping bags, abandoned in the wild will not degraded. This class has excellent recyclability of plastic shopping bags can be recycled many times. Slightly different degrees of decrease in recycling performance, but can be used to produce performance requirements is not high, not strict color shopping bags or trash bag. The key question now is whether back problems.
Starch-based plastic shopping bag-shopping bag-this class with modified starch as raw material, add the appropriate amount of biodegradable materials to improve their performance. Abandoned after the plastic shopping bags used in the field of natural degradation. Starch-based plastic shopping bags with starch as the main raw material, and starches from food, as the current soaring food prices, many countries have banned the consumption of food industrialization projects, so prospects of such products.
Biodegradable plastic shopping bag-this bag which can be fully biodegradable plastics as raw material to produce, has the complete degradation of performance. Degradation products can be completely abandoned in the wild for the small micro-organisms, without any environmental pollution, currently abroad promoting such plastic shopping bags.