| 日本在设施栽培中80%左右覆盖PVC棚膜 |
| 添加时间：2019/8/29 15:51:44 浏览次数： |
| 聚氯乙烯（PVC）棚膜：它是在聚氯乙烯树脂中加入增塑剂、稳定剂、润滑剂、功能性助剂和加工助剂，经压延成膜。其特点是透光性好，阻隔远红外线，保温性强，柔软易造型，好黏接，耐候性好。 Polyvinyl chloride (PVC) greenhouse film: It is made by adding plasticizer, stabilizer, lubricant, functional additives and processing additives into PVC resin and calendering. Its characteristics are good light transmission, far infrared barrier, strong thermal insulation, soft and easy to shape, good adhesion, good weather resistance. 日本在设施栽培中80%左右覆盖PVC棚膜。其缺点是密度大（为1.3g/cm3），一定重量棚膜覆盖面积较聚乙烯膜（PE）减少1/3，成本高，低温下变硬脆化，高温下又易软化松弛，助剂析出后膜面易粘尘土，影响透光，残膜不能燃烧处理，因为会有毒氯气产生。 About 80% of Protected Cultivation in Japan is covered with PVC film. Its disadvantage is high density (1.3g/cm3), a certain weight of shed film cover area than polyethylene film (PE) reduced by 1/3, high cost, hardening and embrittlement at low temperature, easy softening and relaxation at high temperature, film surface after the release of additives is easy to stick dust, affecting light transmission, residual film can not be burned, because toxic chlorine gas will be generated. |
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