Heat shrinkable film has physical and chemical stability

Introduction to the wholesale manufacturer of polymer protective film, the physical and chemical stability of the heat shrinkable film, the material and chemical stability of the film mainly depend on the material constituting the film, that is, the chemical properties of the film material. The physical and chemical stability of the film mainly includes heat resistance, acid and alkali resistance, chlorination, antimicrobial degradation, surface properties (, hydrophilicity, hydrophobicity, electrical properties, toxicity, mechanical strength, etc.). Heat shrink packaging is a commodity. The packaging method widely used in packaging has the characteristics of transparency, skidding, sealing, moisture resistance, etc., its process and equipment are simple, the packaging cost is low, and the packaging methods are diverse. It is loved by merchants and consumers. Its packaging methods are becoming more economical and Development in a practical and environmentally friendly direction. The heat shrinkable film uses the energy of the film from a highly elastic state to be stretched longitudinally or transversely and is stored in the film. Using the memory effect of the shape of the thermoplastic before bidirectional or unidirectional stretching, it recovers when it encounters heat again The function of the shape before stretching, to achieve the purpose of packaging. Heat shrinkable film is a specific application example of the memory effect of high polymer. The shrinkage of the film depends on the degree of stretching of the film during the orientation process, and the heat shrinkage rate reflects the heat shrinkage Performance, heating temperature and time are important factors affecting the heat shrinkage rate. At present, there are not many reports on the heat shrinkage performance of heat shrinkable materials. By investigating the effect of temperature and time on the shrinkage performance of several heat shrinkable films commonly used in production, Provides parameters for products with different packaging design, production and processing requirements. Next: Introduction to the technical characteristics of heat shrinkable film Previous: No more