Biaxially stretched polyester film air-cooled blown film production line

Abstract

The invention discloses a biaxially-oriented polyester film air-cooling and film-blowing production line. The biaxially-oriented polyester film air-cooling and film-blowing production line comprises a condensing device (1), an air supplying device (2), an air returning device (8), an air cooling mechanism (3) and a cooling platform (14), wherein the condensing device (1) is connected with the air cooling mechanism (3); the air supplying device (2) is connected with the cooling platform (14) by an air supplying pipeline (7) through the air cooling mechanism (3); one end of the air returning device (8) is connected with the cooling platform (14), and the other end of the air returning device (8) is connected with the air supplying device (2) through an air returning pipeline; and the cooling platform (14) comprises a cooling platform frame (9), a half-sector-shaped combined leaf (13) arranged on the cooling platform frame (9), and an adjusting mechanism arranged on the half-sector-shaped combined leaf (13). The biaxially-oriented polyester film air-cooling and film-blowing production line disclosed by the invention has the advantages that the two major difficulties that the direction of the cold air is not controlled and sheets warp are solved, the two-sided melt can be quickly set, the occurrence of the crystalline state is avoided, the performance and the quality of a product are greatly improved and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to a polyester film production line, in particular to an air-cooled blown film production line for biaxially stretched polyester films. Background technique [0002] Biaxially oriented polyester film is called BOPET film in the industry. BOPET film has the characteristics of high strength, good rigidity, transparency and high gloss, and is odorless, tasteless, colorless and non-toxic, especially with outstanding strength and toughness. High tensile strength, excellent wear resistance, folding resistance, pinhole resistance and tear resistance; good antistatic property, easy to carry out vacuum aluminum plating, and can be coated with PVDC to improve its heat sealability , Barrier and printing adhesion; BOPET film also has good heat resistance, excellent cooking resistance, low temperature freezing resistance, good oil resistance and chemical resistance. Because of these excellent characteristics, it is widely used in insulating m...

AI Technical Summary

Problems solved by technology

At present, due to the mass production of BOPET film, the existing production line often has wrinkles, warping, and uneven film thickness before single-drawing in the process of producing BOPET film. Low qualification rate, serious waste of raw materials, low film quality and other problems, therefore, the existing production enterprises have put forward higher requirements on performance, quality and cost for the production line of BOPET film, but the production line of the prior art cannot solve the problem.

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