Elastic stretch film

日期:2019/5/9 8:29:40 / 阅读: / 来源:本站

Elastic stretch film
Wrapping film, also known as Elastic film, is also called Selfadhesive film and Stretched film. It is actually a kind of viscoelastic stretch winding which the film itself has in use, and the product is tightly wrapped by the viscoelasticity of the surface of the film and the tensile tension used in use, thereby achieving the purpose of protecting the product. Same heat
Compared with the shrink film, the shrink film is attached to the surface of the packaged object, but the heat shrink film uses heat to release the tensile force accumulated in the film to become a contraction force to wrap the product. Both have good transparency, dust resistance, and anti-theft. They can pack several different shapes of goods together to avoid missing omissions. Can be packaged in a wide range of goods, from small to various daily necessities, large to mechanical equipment, stainless steel pipe, plastic pipe and other wrapping film can be used for transport packaging, such as daily necessities packaging, stainless steel pipe, plastic pipe, profile wrapping, plastic decoration Board, roll floor, roll carpet wrapping, etc.
The performance requirements of the stretch film are:
(1) When using the wrapping film, it is necessary to wrap the package with a large pulling tension. In order to prevent the film from being pulled off, the wrapping film must have sufficient strength to meet the requirements of manual winding or mechanical automatic winding.
(2) The wrapping film should have sufficient toughness, impact strength and pinhole resistance to prevent the sharp corners of the product from being pierced during the winding process, and prevent the packaging film from rupturing when the product is subjected to impact.
(3) The wound film is required to have good viscoelasticity, and the tension applied to the product at the time of winding the package can be maintained for 6 months after packaging, and no slack occurs. It is generally required to maintain 60% of the initial tension 6 months after packaging.
(4) In order to ensure good adhesion of the repeatedly overlapped portion when the wrapping film is wound, it is required that the surface of the elastic film has a certain viscosity, which may be a resin having good viscoelasticity, or adding a plasticizer or a resin to the resin. Sticky resin. For example, a plasticizer or a material such as neoprene is added to the PVC; a butyl rubber or the like is added to the LLDPE resin to increase the viscosity of the film. When a single-sided tacky elastic film is required, the same type of base resin of two different formulations can be used to produce a one-side, non-tacky elastic film by co-extrusion.

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