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Main process of Buy Polypropylene film

Main process of Buy Polypropylene film

  • Categories:News
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  • Time of issue:2023-03-06 00:00
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(Summary description)Buy Polypropylene film processing is mainly divided into blowing process and flat film process. The flat film process is also divided into tape casting process and biaxial stretching process. The different processes have a great impact on the performance and application fields of Buy Polypropylene film products.

Main process of Buy Polypropylene film

(Summary description)Buy Polypropylene film processing is mainly divided into blowing process and flat film process. The flat film process is also divided into tape casting process and biaxial stretching process. The different processes have a great impact on the performance and application fields of Buy Polypropylene film products.

  • Categories:News
  • Author:
  • Origin:
  • Time of issue:2023-03-06 00:00
  • Views:
Information

Buy Polypropylene film processing is mainly divided into blowing process and flat film process. The flat film process is also divided into tape casting process and biaxial stretching process. The different processes have a great impact on the performance and application fields of Buy Polypropylene film products.

(1) Blow film process: Blow polymer melt into tubular film. During this process, the melt will be affected by axial and circumferential forces. Blow film (IPP) processing technology is simple, processing process is short and equipment investment is small, which is the new direction of Buy Polypropylene film development. At present, the demand for IPP in the domestic market is growing.

(2) Tape casting process: Buy Polypropylene film is formed through the production and processing of extrusion tape casting process, and belongs to non-oriented flat extrusion film. Taped film (CPP) only has different degrees of orientation in the drawing direction, which is mainly caused by the production process. Melt casting is rapidly cooled by cold roller, and the film has excellent smoothness and clarity. CPP film has the advantages of good transparency, good stiffness, good moisture resistance, good heat resistance and easy heat sealing. Compared with BOPP film, the obvious short plate is limited in width and insufficient in longitudinal and transverse mechanical properties.

(3) Biaxial stretching process of Buy Polypropylene film

The melt of polymer polypropylene is first made into sheet or thick film through a narrow and long die, and then the BOPP film is finally prepared by stretching in two vertical directions (longitudinal and transverse) at a certain temperature and a set speed in a special drawing machine at the same time or step by step, and through appropriate cooling or heat treatment or special processing (such as corona, coating, etc.).

So far, China Polypropylene film products are still dominated by low-end and mid-end products, and are in the stage of overcapacity, but high-end products still rely on imports; The process development mainly depends on the imitation of foreign processing methods and lacks systematic basic theoretical support, so there is still a large gap between high-end polymer film products and foreign countries.

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