The more film layers in the highly competitive stretch film market, the more market share. Therefore, the product is changed from 5-layer film to 7-layer film or 9-layer film, and the application is displayed by improving performance or reducing cost. Advantage. Affected by this, the production equipment of stretched film is also developing in the direction of multi-layer and large-scale.

 

The newly invested and constructed devices in North America are all new, high-performance, multi-layer thin film equipment. The 5-layer stretch film introduced in the mid-1990s generally uses 4 extruders and a specially designed 5-layer hopper.

 

Currently, the output of 5-layer stretch film in North America accounts for 40% of the total output of the stretch film. In recent years, the newly installed cast stretch film production equipment in North America can produce 5-layer or more film equipment and constantly refresh the number of layers. , first to 7 layers, and later to 9 layers. Now processing plants and machinery manufacturers are discussing and preparing to prepare processing equipment that can produce 11 layers, 14 layers, or even more layers. Gary Oliver, a senior scientist at Cloeren Company in the United States, believes that the micro-layer feeder technology now being industrialized for barrier films should also be used to produce stretched films. Processing plants are very interested, but no one has yet to test them.

 

The competition of stretch film manufacturers is a competition for profits, and an increase in output means an increase in market share. The stretch film production equipment is getting larger and larger, the number of layers of products produced is increased, and the output is also increased accordingly. Five years ago, standard cast film equipment had five 20-inch diameter rolls; now, it uses six rolls. Thus increasing the number of film layers, it is possible to use resins or butene systems with low cost and broader performance range as raw materials to reduce costs and increase competitiveness.