The selection criteria for PVC for blister packaging mainly include the following aspects:
Physical properties: PVC materials should have appropriate density and melting point. For example, PVC sheets of 0.25 to 0.3mm are often used to make blister packaging. These physical properties directly affect the molding effect and product quality during the processing process.
Chemical stability: PVC materials should have good chemical corrosion resistance and be able to resist the erosion of chemicals such as acids, alkalis, and organic solvents. In addition, PVC materials should also have antioxidant properties to ensure that they are not easy to age or discolor during long-term use.
Processing performance: PVC materials should be easy to process and shape, and the blister after molding should be hard and have a moderate molding depth. These characteristics directly affect the physical protection performance and service life of the blister packaging.
Environmental protection: Although some toxic additives and plasticizers may be added to PVC materials during the processing, they are non-flammable and have certain resistance to strong acids and oxidation. However, PVC may cause pollution during the processing process, so its environmental protection should be considered when selecting.
Cost-effectiveness: PVC material cost is relatively low, suitable for low-cost packaging needs. However, the cost of environmental protection treatment is high, and the overall economic benefits need to be considered comprehensively.