Test method for friction coefficient of soft plastic composite film materials for medical packaging
Soft plastic composite film material is an important part of pharmaceutical packaging, which can be used to package powder, granular, liquid and other types of drugs. In many performance indexes of soft plastic packaging, the friction coefficient is good for the material performance and packaging of the material. Conducting has an important impact. If the dynamic friction of the packaging material is too large, the resistance generated during the traction process of the packaging material is large, which may cause the material to be stretched and deformed or even pulled off. However, if the static friction is too small, the slip phenomenon may occur during the traction process. For the soft plastic packaging bag, the friction between the inner materials may affect the opening of the package, and the large friction may cause The opening of the package is deteriorated. Therefore, strengthening the test of the friction coefficient of soft plastic composite film materials for medical packaging is an important guarantee for the smooth progress of the packaging process. The friction coefficients of the inner and outer surfaces of the same kind of packaging materials are not the same. The friction coefficient of the same material on different contact surfaces is also different. Therefore, when testing the friction coefficient of soft plastic packaging materials, the specific conditions should be specified according to the actual use conditions. Friction surface and friction material.