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Analysis of raw materials for container bags

Description:Container bags are widely used and have a wide variety of materials. Currently, there are several types of raw materials for container bags:One is polyethylene (PE); PE is the world's largest synthetic resin and the most expensive plastic packaging material. Traditional plastic packaging PE materials are almost ready to be eliminated because its pollution is really too big.

Answer:

Container bags are widely used and have a wide variety of materials. Currently, there are several types of raw materials for container bags:

One is polyethylene (PE); PE is the world's largest synthetic resin and the most expensive plastic packaging material. Traditional plastic packaging PE materials are almost ready to be eliminated because its pollution is really too big. Polyethylene products are divided into low density, medium density and high density. Among them, high density polyethylene (HDPE) has good crystallinity, hardness, air tightness, mechanical strength and chemical resistance. The low molecular weight polyethylene contained in high pressure low density polyethylene is more soluble. For fats and oils, if the packaging containing polyethylene is used for long-term cooking oil, it can be dissolved in low molecular weight polyethylene, and the food with more fat will have a taste.

The second is polyvinyl chloride (PVC): PVC can be roughly divided into three categories: hard products, soft products and paste products. The seamless line of PVC bottles produced by the injection-blow method has a thin and uniform wall thickness.

Third, polypropylene (PP): Because of its high transparency, smoothness and good processability, it can be combined with other materials to make a variety of beverage packaging containers.

The fourth is polyester (PET or PETP): PET bottle produced by two-axis stretch blow molding, with good transparency, high surface gloss, glassy appearance, PET is a common resin in life, thermoplastic polyester , has excellent toughness, tensile, impact strength, wear resistance, electrical insulation. Due to its good toughness, light weight, airtightness, acid and alkali resistance, it has become a common container for soda, juice and carbonated beverages in recent years.

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