Aluminum-plated casting polypropylene film

Abstract

The invention relates to the technical field of casting polypropylene film preparation, and discloses an aluminized casting polypropylene film. The polypropylene material is prepared from the following components in parts by weight: 120-160 parts of polypropylene, 2-4 parts of an antioxidant, 3-5 parts of a dispersing agent, 1-3 parts of an antistatic agent, 1-2 parts of a stabilizer and 8-14 parts of mica powder filler, the preparation method comprises the following steps: weighing the polypropylene, the auxiliary additive and the filler, putting into a stirring tank, and uniformly stirring and mixing; the mixed materials are put into a double-screw extruder to be extruded and granulated, plastic particles are obtained, and the temperature in the double-screw extruder is controlled to be 170-185 DEG C; preparing the plastic particles into a film by adopting a tape casting method, controlling the film preparation temperature to be 190-220 DEG C, and then performing spray cooling and shaping; performing surface corona treatment on the shaped film, trimming according to the width requirement of the film after the corona treatment, performing tension adjustment on the trimmed film through a tension adjustment mechanism, and finally winding.

Description

technical field [0001] The invention relates to the technical field of casting polypropylene film preparation, and specifically discloses an aluminized grade casting polypropylene film. Background technique [0002] Cast polypropylene film is a polypropylene film produced by casting process, which can be divided into general CPP film, aluminized grade CPP film and cooking grade CPP film, which has excellent effects such as good transparency, uniform thickness, and uniform vertical and horizontal properties. , generally used as the inner material of the composite film. The thickness of ordinary CPP film is generally between 25-50um. After compounding with OPP, the transparency is better, the surface is bright, and the hand feels firm. This material is used in general gift packaging bags; the thickness of cooking grade CPP film is generally between 60-80um. It can withstand high-temperature cooking at 121°C for 30 minutes. It has good oil resistance, air tightness, and high h...

AI Technical Summary

Problems solved by technology

The existing aluminum-coated cast polypropylene film is restricted by the existing equipment in the production process, and it is impossible to accurately control the tension of the polypropylene film during the winding and traction process, resulting in the thickness of the prepared polypropylene film. Precise control is guaranteed, while non-uniform polypropylene film thickness leads to a series of poor performance

[0003] The invention patent applied for CN2020110721242 discloses a polypropylene capacitor film production device, including a frame, a guide roller, a clamping mechanism, a storage roller and a stand, and a rotating rod runs through one side of the stand, and the rotating rod The outer end is fixed with a turntable, and the end of the rotating rod away from the turntable is fixed with a first bevel gear. An internally threaded pipe is provided, a connecting plate is fixed on the top of the internally threaded pipe, support rods are symmetrically fixed on both sides of the top of the connecting plate, a cutter roller is fixed on the top between the two support rods, and the outside of the cutter roller is uniform An annular cutting tool is provided for rotation, and limit sliders are fixed at both ends of the cutter roller, two limit chutes are opened at the top inside the stand, and the limit sliders are located inside the limit chute; the invention discloses The polypropylene capacitive film production device cannot achieve precise control of the film tension before winding during the production process of the cast polypropylene film, which may easily lead to uneven thickness of the prepared cast polypropylene film, which makes it unable to reach the aluminum plating level The effect of cast polypropylene film

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