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Flexible packaging methods of processing of plastic film

by：Kolysen 2020-12-18

Flexible packaging commonly used generally for plastic film, film also supplemented by material such as paper, aluminum foil. According to the GB/T2035 - — In the 1996 national standard definition, plastic film is refers to the thickness at 0. 25 mm below the smooth and soft plastic products. Common processing methods are: 1, the extrusion LiuYanFa, refers to the plastic in the extruder by heat, pressure and make the material to flow continuously through the nose mouth, stretch film cooling on the metal bin cylinder, then the other appropriate treatment and made into film. LiuYanFa production known as stretch film, with the letter C. 2, blow molding, blow molding plastic raw materials in heating molten plasticizing extruder. Although shape ring head, cylinder shaped thick film extrusion. In addition. Blow out from the core center of compressed air will be thick film blowing big in diameter direction, become a circle tubular membrane, and then after cooling, traction winding on the reel and into finished products. 3, two-way stretching method, the plastic film on the material in the glass transition temperature, melting temperature below the temperature range of the technological process of molecular orientation, called drawing process. In one direction tensile, usually for the longitudinal tensile, called uniaxial tensile, made of thin film called one-way stretch film, stretching the bidirectional stretching in vertical and horizontal two direction, was prepared by film called two-way stretch film. All the above is the content, if you have not understand questions, please contact our customer service.