How is plastic pe film produced?

Plastic pe film is a very widely used plastic product, which is often used in the agricultural industry as a material for building plastic greenhouses. Let's take a look at the production technology of plastic pe film. Production technology of plastic pe film: There are many kinds of molding and processing methods of plastic pe film, such as calendering method, casting method, blow molding method, stretching method, etc. In recent years, biaxially oriented film has become the focus of everyone's attention. In the future, biaxial stretching technology will be more developed in the direction of special functional films, such as thick film stretching, thin film stretching, and multi-layer co-extrusion stretching. In recent years, the demand for packaging materials in the habitual packaging industry has been increasing, and the market for various functional films has developed rapidly. The plastic film produced by biaxial stretching can effectively improve the stretching performance of the material (tensile strength is 3-5 times that of the unstretched film), partition performance, optical performance, heat and cold resistance, dimensional stability, thickness uniformity And many other functions, and has the characteristics of fast production speed, large production capacity, high power, and the market is developing rapidly. Biaxial stretching principle The principle of biaxial stretching of plastic pe film is to heat and melt the high polymer resin through an extruder to extrude a thick sheet, and then in an appropriate temperature range above the glass transition temperature and below the melting point (in a high elastic state) , when passing through the vertical drawing machine and the horizontal drawing machine, under the action of external force, a certain multiple of stretching is carried out in the longitudinal direction and the transverse direction successively, so that the molecular chain or crystal plane of the polymer is oriented in the direction parallel to the plane of the film. Arranged in an orderly manner; then heat-setting in a tensioned state to fix the oriented macromolecular design; finally, the desired plastic pe film can be obtained by cooling and subsequent treatment.