Changes

Blown film equipment can be categorized depending on the number of layers the film, which the machine produces, consists of. Plastic film are commonly used for packaging and insulating goods that are sensitive to light, heat and other external factors. The properties of the plastic film can be greatly engineered by layering plastic films together, (this what the co-extrusion is referring to) creating the so called barrier films. In some certain barrier film technologies plastic film is co-extruded with non-plastic material.

Blown film equipment can be categorized depending on the number of layers the film, which the machine produces, consists of. Plastic film are commonly used for packaging and insulating goods that are sensitive to light, heat and other external factors. The properties of the plastic film can be greatly engineered by layering plastic films together, (this what the co-extrusion is referring to) creating the so called barrier films. In some certain barrier film technologies plastic film is co-extruded with non-plastic material.

Examples:

==Examples==

mono-layer extrusion equipment

[http://www.peccanada.com/plastic-processing-equipment/extruders/monolayer-blown-film-line.html Mono-layer extrusion equipment for producing plastic film for food and agricultural packaging using mLLDPE, LLDPE, LDPE, and HDPE.]

three-layer extrusion equipment

 

five to nine -layer extrusion equipment

[http://www.peccanada.com/plastic-processing-equipment/extruders/three-layer-co-extrusion-blown-film-line.html three-layer extrusion equipment]

five to eight -layer downward facing extrusion equipment

 

[http://www.peccanada.com/plastic-processing-equipment/extruders/multilayer-co-extrusion-blown-film-line.html five to nine -layer extrusion equipment]

 

[http://www.peccanada.com/plastic-processing-equipment/extruders/multilayer-downward-water-cooling-co-extrusion-blown-film-line.html five to eight -layer downward facing extrusion equipment]

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