PVC shrink film is a kind of heat - shrinkable packaging material made mainly of polyvinyl chloride (PVC). It has the following remarkable characteristics:
- Good shrinkage performance: When heated, PVC shrink film can shrink rapidly and evenly, closely adhering to the surface of the packaged object to form a firm package. Its longitudinal and transverse shrinkage rates can be adjusted according to different requirements. Usually, the longitudinal shrinkage rate is between 15% - 30%, and the transverse shrinkage rate is between 20% - 40%.
- High transparency: It has excellent optical properties, with a light transmittance of over 85% and a haze of less than 5%. It can clearly display the appearance of the packaged product, enhance the product's display effect, and attract consumers' attention.
- High strength and toughness: It has a relatively high tensile strength. The general longitudinal tensile strength is 20 - 40MPa, and the transverse tensile strength is 25 - 45MPa. The elongation at break is also at a relatively high level. This makes the shrink film not easy to break during the packaging process and can withstand a certain amount of tension and impact, effectively protecting the product from damage during transportation and storage.
- Good heat - sealing performance: The heat - seal strength can reach 8 - 20N/15mm. Through the heat - sealing process, the packaging can be sealed quickly and firmly to ensure the integrity of the package and prevent the contents from leaking.
- Chemical stability: It has good chemical resistance and can resist the erosion of some chemical substances such as acids, alkalis, and salts. It is suitable for packaging various products with different properties.
PVC shrink film is widely used in many fields such as food, beverage, medicine, daily necessities, cosmetics, electronics, and electrical appliances. For example, in the food industry, it can be used to package various candies, biscuits, beverage bottles, etc. In the medical field, it can be used for the small - package of drugs and the packaging of medical devices. In the daily - use and cosmetics industry, it can be used to package the bottles of shampoos, body washes, skin - care products, etc. In the electronics and electrical appliances industry, it can be used to package mobile phones, headphones, chargers, and other products.
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