The technological innovation of the extruder(1)

Mature development of multi-layer coextrusion technology(extruder)
Multilayer composite technology(extruder) uses materials with medium and high barrier properties to composite with other packaging materials, and integrates the high barrier properties of barrier materials and other cheap or special mechanical, thermal and other properties of other materials to achieve specific functional needs. The structural design of CO extruded composite film gradually requires to systematically achieve the ideal state of integrating function, technology, cost, environmental protection, safety and secondary processing, so as to maximize the number of composite layers, which has become one of the technologies pursued by suppliers. The seven layer composite film co extrusion blow molding technology of Guangdong Jinming Plastic Equipment Co., Ltd. can be described as a typical development in this field in China.

The key technologies(extruder) adopted by the seven layer composite film coextrusion blow molding unit include: screw plasticizing extrusion system with two short and one long and varying pitch, optimal design of vibration induced plasticizing device by engineering analysis software, flat valve plus forming die and inclined valve plus forming die, internal cooling technology and double tuyere negative pressure cooling technology, multi-component weight-loss metering feeding, On line film thickness precise control system, computer centralized automatic control system and bus control (CANopen) technology, etc.

With the increase of layers(extruder), film production technology suitable for special functions is also one of the hot spots of market development. Guangdong Shicheng company has designed and manufactured a PP environmental protection wood grain film casting production line with a width of 3150mm. The capacity of the production line exceeds 800kg / h. The screw is designed as high-speed shearing, mixing and high-efficiency plasticizing screw. Customers can directly use high filled calcium carbonate powder and inorganic pigment toner, so as to save expensive raw material costs. In addition to the production of PP environment-friendly wood grain film, the whole line can also flexibly convert and produce other products to broaden the types of customers' products. In the trial production process of Shicheng company, we not only produced beautiful PP wood grain film, but also produced CPP film, PP stationery film and PP stationery sheet.