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PVC压延膜的加工工艺

文字:[大][中][小] 手机页面二维码 2021/1/12     浏览次数:    

对不同的膜或生产不同的产品时,可采用不同的加工工艺。在膜的种类、性质及各种助剂一定的条件下,加工工艺对膜性能的影响是十分显著的,PVC压延膜的加工工艺如下:

(1)注塑成型:对热塑性膜,将膜颗粒在注塑机内加热熔化、以较高的压力和速度注入模具内;

(2)挤压成型:将加热熔化的膜通过挤压机的挤压作用,经不同的孔型??诙烦刹煌巫吹男筒?;

(3)喷涂工艺:在金属、非金属板面及纤维网胎上喷涂塑料膜层;

(4)模压成型:对热固性膜,将塑料粉、片、粒状原料放入模具中加热软化时加压成型,使之发生化学交联而固化;

(5)层压成型:层状增强物质浸涂热固性树脂后,经处理制成烂叠板材、眷初再经层压机加压加热处理,使之固化成型;

(6)浇注成型:将液态膜浇注在模具个,使之在常压或低压下固化冷却成型;

(7)发泡成型:可采用机械方法或化学方法在塑料内引入大数微小的球形气泡而制成体积密度小、保温隔热性能好、吸音性能好的泡沫膜。

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