Laminating film Typical structure
We usually see the composite packaging film dazzling, varied, of which the following are the following:
First, paper aluminum-plastic composite packaging film
Typical structure: paper / PE / AL / PE, the production process for the extrusion compound.
Features: ① good printability personalized printing, is conducive to improving product quality; ② good stiffness, to ensure a good product shape; ③ gas or water vapor has a good barrier, you can ensure a longer drug Of the shelf life; ④ good degradation, is conducive to environmental protection.
Second, high temperature cooking compound packaging film
Typical structure: PET / CPP or PET / Al / CPP, the production process for the dry composite.
Features: ① basic can kill all the bacteria in the package; ② can be placed at room temperature dairy packaging, no refrigeration. ③ the water vapor and gas have a good barrier, high temperature cooking; ④ can be printed, with good printability.
Third, easy to tear foil foil
Typical structure: PT / PE / AL / PE over-packaging, the production process for the extrusion compound.
Features: ① has a good easy to tear, to facilitate access to drugs consumers; ② good gas, water vapor barrier, to ensure a longer shelf life of drugs; ③ good degradation, is conducive to environmental protection.
Fourth, aluminum composite packaging film
Typical structure: BOPP / VMCPP, PET / VMPET / PE, the production process for the solvent-free composite.
Features: ① a metallic luster; ② good gas, water vapor barrier, to ensure a longer shelf life; ③ light, non-cooking barrier packaging, such as seaweed packaging, puffed food, biscuits food packaging.
Identification of composite membrane structure:
When you get a soft package, how to quickly identify it is a single layer of bags or composite bags do? What are the structural properties? As the flexible packaging industry, these problems are we need to master.
First, through the appearance of composite film to determine the type
Plastic composite packaging film is made of a variety of single-layer film composite, and its identification method and single-layer film is different. First of all, combined with the performance characteristics of single-layer film and composite purpose requirements, can be roughly differentiated. According to the transparency of the judge, aluminum foil, aluminum film is generally opaque composite film; with high barrier function, generally composite film. The base film material can be roughly judged from the appearance and mechanical properties of the film.
Second, the rapid identification of composite film four tips
1, composite film generally have natural curl phenomenon, such as the hot water is more obvious. 2, composite film, such as the innermost layer and the outermost material is different, the two sides of the film feel different, careful touch can be distinguished.
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