Production technology and characteristics The production of shortened films is usually produced by extrusion blow molding or extrusion casting to produce thick films, and then longitudinally and transversely stretched at a high elastic temperature above the softening temperature and below the melting temperature, or Stretching and orienting only in one direction, and not stretching in the other direction, the former is called a biaxially stretched shortening film, while the latter is called a unidirectionally shortened film. When in use, when the temperature is greater than the stretching temperature or close to the stretching temperature, the packaged goods can be wrapped with reliable shortening force.

Shortening the package has the following benefits:

1) It has a beautiful appearance and is close to the product, so it is also called body-packed packaging, which is suitable for various shapes of product packaging;

2) Good protection, if the inner packaging of the shortened packaging is combined with the transport packaging hanging on the outer packaging, it can have very good protection;

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

4) Good economy;

5) Good anti-theft, many kinds of food can be packed together with a large shortening film to avoid throwing away;

6) Good stability, the goods will not be messed up in the packaging film;

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