How is the crystal point of PET film formed? PET film left on the surface of the round small points, it is embedded in the film, there is an obvious protrusion, under the irradiation of the light source, there will be a little obvious bright point, that is, the crystal point, it is very big […]
PET protective film material is transparent colorless, the surface after hardening treatment, general PET protective film material according to the origin of different, the surface hardening value between 3H-4H, the better the surface hardening, the stronger the wear resistance. Transmittance is also the main property of PET protective film material, the general transmittance is more […]
Protective film is a product of polyethylene film manufactured by machining technology. It has certain characteristics of wear resistance, cost economy, strong impact resistance, easy printing and strong barrier performance, which can improve the protective performance of products and ensure that products are not easy to be damaged. The protective film is mainly composed of […]
Now the fast drying glue can not put an end to this kind of whitening phenomenon, we have also encountered this problem, our solution is silicone glue, put in a ventilated place with a fan after 2H, and then it is fully dry in the product packaging gift box, so that there is basically no […]
Basic information polyurethane (English name) : PU polyurethane, Chinese name: polyurethane; In Chinese, polyurethanes, also known as polycarbamates, are macromolecular compounds containing a duplicate carbamate group (NHCOO) in their main chain. It is composed of organic diisocyanate or polyisocyanate and dihydroxyl or polyhydroxyl compounds. In addition to carbamate, polyurethane macromolecules can also contain ether, ester, […]
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