Casting compound type CPP aluminum-base plated film

Abstract

The invention relates to a casting compound type CPP aluminum-base plated film. The film consists of a layer A, a layer B and a layer C which form an integral body through hot melting, co-extrusion and biaxial tension, wherein the layer A is a heat-sealing layer, the layer B is a core layer, the layer C is an aluminized layer, and each layer comprises the following raw material components in percentage by weight: 95 percent of co-polypropylene and 5 percent of anti-sticking agent for the layer A; 100 percent of homo-polypropylene for the layer B; 75 to 93 percent of the co-polypropylene, 5 to 20 percent of reinforcing agent and 2 to 5 percent of the anti-sticking agent for the layer C, wherein the reinforcing agent is an ethylene methyl acrylate copolymer WH303. Because the formula of the layer C (the aluminized layer) is added with an aluminizing reinforcing agent, the adhesion force of an aluminized aluminum layer is greatly increased to ensure that the aluminum layer cannot be peeled off when the CPP aluminized film is in casting compounding. Besides, the casting compound type CPP aluminum-base plated film can be produced on the existing production line and can be produced in bulk without changing equipment.

Description

Technical field: [0001] The invention relates to a three-layer co-extruded cast polypropylene film, which is mainly used as a cast composite aluminum-plated base film. Background technique: [0002] At present, vacuum aluminum plating with cast polypropylene film (CPP film) is very common and widely used. The three-layer material ratio is as follows: [0003] Layer A: heat seal layer: polypropylene copolymer 95% + anti-sticking agent 5%; [0004] B layer core layer polypropylene copolymer 100%; [0005] Layer C Aluminum layer Copolymerized polypropylene 92-98% + anti-sticking agent 2-8%. [0006] Use this base film for dry aluminizing, and the CPP aluminized film after aluminization has no problem in dry lamination with BOPP film or other films, but after cast lamination with PP or PE, the aluminum layer is easy to peel off. Seriously affect the oxygen barrier and water vapor barrier properties unique to the aluminized film, and lose the barrier function of the aluminized...

AI Technical Summary

Problems solved by technology

[0006] Use this base film for dry aluminum plating, and the CPP aluminized film after aluminum plating has no problem in dry lamination with BOPP film or other films, but after casting lamination with PP or PE, the aluminum layer is easy to peel off. Seriously affect the oxygen barrier and water vapor barrier properties unique to the aluminized film, and lose the barrier function of the aluminized film