BOPP thin film forming process

Abstract

The invention belongs to the technical field of BOPP thin films, and particularly relates to a BOPP thin film forming process. An extrusion edge trimmer comprises a trimmer body, an extrusion mechanism and a cutting block; the inner surface of the machine body is rotationally connected with a first expansion rod in the inner wall of the machine body through a rotating shaft; the right side of thefirst expansion rod is rotationally connected with a second expansion rod in the inner wall of the machine body through the rotating shaft; an extrusion mechanism is arranged in the inner wall of themachine body on the right side of the second expansion rod; a cutting block is fixedly connected in the inner wall of the machine body on the right side of the extrusion mechanism; the right side of the cutting block is rotationally connected with first collecting rods in the inner walls of the machine bodies on the two sides through the rotating shafts; and the right side of the first retractingrod is rotationally connected with a second retracting rod in the inner wall of the machine body through the rotating shaft. The BOPP thin film forming process is mainly used for solving the problemsthat when the film stretching mechanism stretches a BOPP film, due to the fact that the thickness of the BOPP film is not equal, the thickness of the BOPP film is not uniform, after stretching is finished, the outer side edge of the BOPP film is often uneven and the thickness difference is large.

Description

technical field [0001] The invention belongs to the technical field of BOPP films, in particular to a BOPP film forming process. Background technique [0002] Commonly used BOPP films include: ordinary biaxially oriented polypropylene film, heat-sealed biaxially oriented polypropylene film, cigarette packaging film, biaxially oriented polypropylene pearlescent film, biaxially oriented polypropylene metallized film, matting film, etc. BOPP film is a very important flexible packaging material. BOPP film is colorless, odorless, tasteless, non-toxic, and has high tensile strength, impact strength, rigidity, toughness and good transparency. The surface energy of BOPP film is low, and corona treatment is required before gluing or printing. After corona treatment, BOPP film has good printing adaptability, and can be overprinted to obtain exquisite appearance effect, so it is often used as the surface layer material of composite film. Therefore, the market prospect of BOPP film is...

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