PVC is different from PE and EVA in film application
A lot of people ask what is the difference between PVC and PE film? Take a look.
Soft film polyvinyl chloride (PVC) shed film, polyethylene (PE) shed film, ethylene - vinyl acetate polymer (EVA) agricultural film.
(1)PVC (PVC) shed film: PVC resin added plasticizer, stabilizer, lubricant, functional auxiliaries and processing auxiliaries, by rolling into the film. Good light transmission, far infrared barrier, thermal insulation, soft and easy to shape, good adhesion, good weather resistance are its special place. Its disadvantage is high density (1.3g/cm3), a certain weight of shed film coverage area than polyethylene film (PE) 1/3, high cost, become hard and brittle at low temperature, high temperature is easy to soften and relax, after the precipitation of additives film surface is easy to stick dust, affect the light, residual film can not be burned, because toxic chlorine gas will be generated. About 80% of Japanese plant culture is covered with PVC film.
(2)Polyethylene (PE) shed film: polyethylene shed film is polyethylene resin after extrusion blow plastic film. Light, soft, easy to shape, good transparency, non-toxic, suitable for all kinds of shed film, film, is the main agricultural film varieties. Its disadvantage is: poor weather resistance, poor insulation, not easy to bond. If the production of greenhouse film must be added aging resistance agent, drip - free agent, insulation agent and other additives modified, in order to meet the requirements of production. The main raw materials of PE are high pressure polyethylene (LDPE) and linear low density polyethylene (l-ldpe).
(3)Ethylene - vinyl acetate polymer (EVA) agricultural film: EVA infrared barrier between PVC and PE. EVA has weak polarity, can be mixed with a variety of weathering agents, thermal insulation, anti-fog blowing film, compatibility, inclusive.
Different materials have different characteristics: EVA has excellent low temperature resistance; Next is PE, contain 30% plasticizer PVC agricultural film in 0°C hardening, tensile strength and impact resistance.
EVA and PVC agricultural film are not suitable for high temperature and hot summer application. The initial light transmittance of PVC and PE can reach 90%. As time goes by, PVC will affect the light transmittance and make it decrease quickly. PE transmittance decreases slowly. The above is the difference between PVC and PE film in application. Hope it helps.