Composite film, as the name suggests, is a thin film material made of two or more materials. It is a widely used modern packaging material, extensively applied in packaging and printing in industries such as pharmaceuticals, food, cosmetics, and pesticides. Depending on the specific needs, composite films can be categorized into three types: paper-plastic composite, aluminum-plastic composite, and paper-aluminum-plastic composite.
The performance indicators of composite films are crucial for evaluating their quality. Below are common performance indicators for composite films:
1. Thickness: Refers to the thickness of the composite film, usually measured in μm.
2. Adhesion Strength: Refers to the adhesion strength between the different materials in the composite film; stronger adhesion results in better adhesion.
3. Tensile Strength: Refers to the strength of the composite film under tensile stress, also an important indicator for evaluating film material performance.
4. Heat Seal Strength: Refers to the heat seal strength of the composite film, generally expressed in N/15mm.
