Production skills and characteristics The production of shortened films usually uses extrusion blow molding or extrusion casting to produce thick films, and then longitudinal and transverse stretching at a high elastic temperature above the softening temperature and below the melting temperature. It stretches in one direction only, and does not stretch in the other direction. The former is called biaxially stretched shortening film, while the latter is called unidirectionally shortened film. In use, when the temperature is higher than or close to the stretching temperature, it can reliably shorten the force to wrap the packaged product.

Shortening packaging has the following benefits:

1) Beautiful shape, close to the product, so it is also called body-packing, which is suitable for various shapes of product packaging;

2) Good protection, if the inner package of the shortened package is combined with the shipping package hanging from the outer package, it can have very good protection;

3) Good cleanliness, especially suitable for precision instruments and high-precision packaging of electronic components;

4) Good economy;

5) Good anti-theft properties, multiple foods can be packed together in a large shortening film to avoid throwing them away;

6) Good stability, goods will not be messy in packaging film;

7) Good transparency, customers can directly see the contents of the product.