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BuKePrinting >> knowledge >> 軟包裝印刷使用的材3.真空鍍鋁薄膜

軟包裝印刷使用的材3.真空鍍鋁薄膜

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2021-06-24 | 621 Views | Share:
軟包裝印刷使用的材3.真空鍍鋁薄膜

軟包裝印刷使用的材3.真空鍍鋁薄膜

直空鍵鋁薄膜的主要作用是代替鋁箔復合，使軟塑包裝同樣具有銀白色的光澤，以提高軟包裝膜袋的阻隔性和遮光性，從而降低成本。真空鍍鋁的基材膜是熔點比較高的膜如聚丙烯膜，包括CPP、PP、BOPP、PET、NY。玻璃紙在採用預處理或濕處理後也可直接真空鍍鋁，PE、P膜則可以採用間接工藝鍍鋁。為提高鍍鋁的牢固度，國外採用在被鍍基材膜上塗底的方法，而國內普遍採用無底塗面，僅在錶面進行電暈處理。

薄膜的真空鍍鋁是在薄膜的面膜上進行反面印刷，然後真空鍍鋁再同底膜復合。油墨只需是耐熱性優良的油墨即可。真空鍍鋁的牢度更好，厚度小，與鋁箔相比，大大節約了用鋁量，前者為後者的1200～1/100。但有時不能用於代替需要高阻隔性的鋁箔復合膜。乾式復合真空鍍鋁膜效果好，但註意膠液用量必須要滿足包裝的需求，一般在3.5-5g/m2之間，以保證其耐高溫，且不影響膠液層間膜的牢固度。復合真空鍍鋁膜必須用專用膠，固含量不低於75%

軟包裝印刷使用的材3.真空鍍鋁薄膜
軟包裝印刷使用的材3.真空鍍鋁薄膜

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