introduce

Heat shrinkable packaging is one of the more advanced packaging methods in the market. The shrinkable film is wrapped outside the product or package. After heating, the shrinkable film is wrapped tightly around the product or package to fully display the appearance of the product, improve the exhibition and sales performance of the product, and increase the beauty and sense of value. At the same time, the packaged goods can be sealed, moisture-proof and pollution-proof, and protect the goods from external impact. It has a certain buffer, especially when packaging fragile goods, it can prevent the vessels from flying when they are broken. In addition, it can reduce the possibility of product disassembly and theft.

principle

Production technology and characteristics shrink film is usually produced by extrusion blow molding or extrusion tape casting, and then stretched longitudinally and transversely at a high elastic temperature above the softening temperature and below the melting temperature, or stretched and oriented only in one direction and not in the other direction. The former is called biaxial stretch shrink film, The latter is called unidirectional contraction membrane. When in use, when it is greater than or close to the tensile temperature, the packaged goods can be wrapped with reliable shrinkage force.

origin

The heat shrinkability of film was applied as early as 1936. At first, rubber film was mainly used to shrink and package perishable food. Heat shrinkable technology has been developed to almost package all kinds of goods with plastic shrinkable film.

advantage

1) Beautiful appearance, close to goods, so it is also called body fitted packaging, which is suitable for commodity packaging of various shapes;

2) Good protection. If the inner packaging of shrink packaging is combined with the transporta