The production process of PVC membrane is open package, inspection, screening, formula mixing, granulation, extrusion thick film, air cooling, hot water bath, boiling water heating, shaping cylinder transverse blowing, clamping film roller extinguishing foam, and forming heat shrinkable film.
PVC production process is not complicated, the ordinary production line consists of roller press, printing machine, back coating machine and cutting machine, mainly through direct stirring roller, roller rotation and high temperature rolling production film thickness is only 0.3 mm to 0.7mm, and through the production at the same time the printing machine in front the color film, through the back coating machine in the back of the membrane attached to a layer of back coating. Do not underestimate this layer of back coating, it is an important guarantee for the quality of PVC film. Back coating made of special material, is a kind of high affinity agent, it is because of this layer back coating PVC film can be tightly and MDF or other plates together, ten years or even fifteen years is not open. And the biggest problem of ordinary sticking mask is unable to solve the problem of film shedding. Because of the whole production process is at a high temperature (the temperature rolling machine reaches 220 degrees) carried out, which makes PVC film with high resistance to photobleaching and refractory, ensure the high quality of PVC film.