How are plastic films classified?

There are no uniform regulations for the classification of plastic films. Usually people are used to the following three classification methods: 1. According to the raw materials used for plastic film forming: polyethylene plastic film, polypropylene plastic film, polyvinyl chloride plastic film and polyester plastic film, etc. 2. According to the use of plastic film: there are agricultural plastic film (here, according to the specific use of agricultural film, it can be divided into plastic film and greenhouse film); packaging plastic film (packaging film can be divided into food packaging film and Packaging films for various industrial products, etc.) and breathable plastic films for special environments and special purposes, water-soluble plastic films and plastic films with piezoelectric properties, etc. 3. According to the molding method of plastic film: there are plastic films that are extruded and plasticized and then blow-molded, which are called blown plastic films; plastic films that are extruded and plasticized, and then the molten material is cast and formed from the die mouth, It is called cast plastic film; the plastic film made of plasticized raw materials is rolled by several rollers on the calender, called calendered plastic film.

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