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Material Classification Of Plastic Shopping Bags

Aug 14, 2017

      The plastic shopping bag is a packaging material made of polyolefin as the main raw material and suitable addition of other materials. Polyolefin mainly used polyethylene (PE), commonly known as soft gum, the main products include low-density polyethylene or high-pressure polyethylene (LDPE), high-density polyethylene or low pressure polyethylene (HDPE), linear low-density polyethylene (LLDPE) and Metallocene polyethylene (MLLDPE) four categories. In order to reduce its cost, most companies add about 30% calcium carbonate to fill plastic shopping bags, such as plastic shopping bags because of burning in the landfill without releasing poisonous gas. The national plastic shopping bag has just been introduced into the following three categories:Plastic Shopping Bags
      Ordinary plastic shopping bags, using polyolefin and fillers as raw materials, this type of plastic shopping bags do not have degradation performance, abandoned in the field will not be degraded. This kind of plastic shopping bag has excellent recyclable, can be recycled many times. The performance of recycled materials is slightly reduced, but it can be used in shopping bags or garbage bags with low production performance requirements and less stringent color requirements. The key question is whether the problem can be recycled back.Plastic Shopping Bags
      Starch-based Plastic shopping bags, such shopping bags with modified starch as the main raw material, appropriate addition of a small amount of other degradable materials to improve its performance. The plastic shopping bag is discarded in the field and can be degraded naturally. Degradable Plastic shopping bag-this kind of shopping bag is produced with completely degradable plastic as raw material and has complete degradation performance. Products abandoned in the field can be completely degraded to small molecular micro-organisms, without any environmental pollution, abroad are promoting such plastic shopping bags. According to the specific composition of fully degradable plastics, it can be divided into the following three categories:Plastic Shopping Bags
     The development space of PLA and PHA biodegradable plastics, which is synthesized from natural starch as raw material by biological fermentation, needs to consume a lot of grain. The aliphatic polycarbonate (APC)-type degradable plastic, synthesized from carbon dioxide, uses carbon dioxide, a everyone industrial byproduct, to consume neither food nor carbon emissions, to eliminate global warming caused by greenhouse gases, and thus to have a broad market prospect. The complete degradation product of non-starch degradation agent in ordinary plastics is in the stage of industrialization, such as the reliable degradation performance and promising development.Plastic Shopping Bags