Application of blown film machine in the production of biodegradable plastic materials

Application of blown film machine in the production of biodegradable plastic materials
With the development of the economy, the demand for plastic products in the market is increasing every year, which has an impact on the environment. In order to prevent further deterioration of the environment, technological changes must be made, and promoting the use of blown film machines to produce biodegradable plastics is one of the measures.

Degradable plastic materials include plasticizers, twin-screw, and base materials. The alloy is pre plasticized in a plasticizer solution to reduce its melting point. Starch is used as the base material, and modified alloys and additives are added for blending treatment in high-speed mixing equipment. The processed material is mixed using a large aspect ratio, high shear screw combination, two-stage exhaust mixing and granulation equipment, and melt mixed under high shear to produce a special material. The film is directly blown on a blown film machine. Due to the high concentration of hydroxyl groups in the raw materials, an interpenetrating network structure can be formed, which has good fluidity. The film has good strength, softness, gloss, gas resistance, oil resistance, solvent resistance, and heat sealing properties. In addition, it is made into The process is simple, with high production capacity, high efficiency, and low production costs. Using 40-80 parts of film grade HDPE resin, 5-40 parts of film grade LLDPE resin, 5-30 parts of film grade PP resin, 1-3.0 parts of coupling agent and lubricant, 0.1-0.3 parts of anti UV absorber, and 0.2-1 part of alpha methylstyrene oligomer, the sum of the above components is 100 parts by weight. The above combination is mixed evenly or made into masterbatch, and then blown into a cylindrical film by the above blowing method on an extrusion blown film machine. The temperature of the three stages of the blown film machine is: 180 ℃ for the first stage, 200 ℃ for the second stage, 220-230 ℃ for the third stage, and 210 ℃ for the film head.