Stretch film, also known as stretch film and heat shrinkable film, is the earliest PVC based material in China, with DOA as plasticizer and self-adhesive to produce PVC winding film. Due to environmental problems, high cost (relatively large PE ratio, less unit packaging area), poor tensile property and other reasons, PE stretch film was gradually eliminated when it was produced in China from 1994 to 1995. At first, EVA was used as the self-adhesive material for PE stretch film, but its cost was high and it had flavor. Later, PIB and VLDPE were used as the self-adhesive materials. Now LLDPE is the main substrate, including C4, C6, C8 and Metallocene PE (MPE).
Wrapping film
In the early stage, LLDPE stretch film was mainly blown, from single layer to two or three layers; now, LLDPE stretch film is mainly produced by casting method, and its process is shown in the figure below, because the casting line has the advantages of uniform thickness and high transparency, which can be applied to the requirements of high rate pre stretching. Due to the single-layer casting can not do single side sticking, the application field is limited. Single layer and double layer casting are not as wide as three-layer casting in material selection, and the formula cost is also high, so the structure of three-layer coextrusion is more ideal. High quality tensile film should have the characteristics of high transparency, high longitudinal elongation, high yield point, high transverse tear strength and good puncture performance.
[product features]: the new era company's winding film is made of polyethylene and PE plastic material with expansion performance of synthetic fiber, which is non-toxic and pollution-free, harmless to people's health!
Wrapping film
[product advantages]: PE stretch winding film has the advantages of high strength, wear resistance, corrosion resistance, rain resistance, beautiful color, convenient use, etc.; we are willing to establish a long-term and stable cooperative relationship with you, win-win and common development.
The main advantages of stretch wound film: thin thickness, good performance price ratio, transparent appearance, double-sided adhesive, non-toxic, tasteless, safe, easy to use, high efficiency, high buffer strength, good retraction rate, puncture resistance and tear resistance.