In life, people often see all kinds of film materials, not only cling film, but also food packaging, which are very useful, and people cannot live without these packaging. Co-extrusion film is a common film in modern life. What are its advantages? The following is an introduction about "the advantages of co-extrusion film and the scope of application".

 

[Detailed introduction of co-extrusion film]

 

Co-extrusion film is directly blown out by a film blowing machine in a multi-layer co-extrusion process

 

All layers of the co-extruded film are extruded at the same time, so there will be no other non-plastic materials such as aluminum foil and paper.

 

The combination of product materials is relatively small, and the scope of application is also small. However, since the winter layer and the layer are bonded by heat and no adhesive is required, the hygienic safety of the food packaging co-extruded film must be relatively reliable.

 

Difference: Co-extrusion film: There is no glue between the film and the film

 

It is a separation membrane composed of a microporous membrane or an ultrafiltration membrane as a support layer, and a dense homogeneous membrane with a thickness of only 0.1-0.25 μm as a barrier layer on its surface. This greatly increases the amount of substance permeated.

 

[Wide application of co-extrusion film]

 

The film produced by blending single-layer LDPE or LDPE with other resins has a single performance and cannot meet the packaging requirements of modern product development. Therefore, the co-extruded film produced by co-extrusion blown film or co-extrusion casting equipment has improved overall performance . For example, the comprehensive properties of the film such as mechanical strength, heat sealing performance, heat sealing temperature, barrier properties, opening properties, and anti-pollution properties are improved, and its processing cost is reduced, and it is widely used.

 

Such as H-layer co-extrusion blown film hot melt adhesive film: PE/HM, cable film PE/EAA, low temperature heat sealing film of MLLDPE, EVA cover film, antistatic film, slip film. H-layer co-extrusion cast co-extruded CPP, unmodified PP/heat-sealable PP, etc. Three-layer and five-layer nylon co-extruded films, five-layer and seven-layer EVOH and PVDC high barrier films are also constantly being developed and widely used.