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        高密度聚乙烯簡介
        來源:華瑞機械 時間:2014/9/25

        高密度聚乙烯外觀類似中壓聚乙烯,呈乳白色半透明狀,比中壓聚乙烯硬,表面光澤較差,與低壓聚乙烯相當。吹膜機使用吹塑和T模擠出工藝。用吹塑機制成的薄膜占壓倒多數,這種薄膜多用來制作食品的中包裝以及供應給商店、食品店使用的包裝材料,還可包裝冷凍點心、農產水產加工食品。這種薄膜很早以前就充分地利用其耐熱性來包裝豆腐、生面條、辦公和體育用具、藥品、燕煮熱毛巾等。它所包裝的物品不宜長期貯藏。
        T模擠出法制成的薄膜透明度好、耐折,多用做面包點心等包裝材料。
        高密度聚乙烯的特性:(1)耐熱、耐寒性好;耐蒸煮、耐冷凍。(2)氣密性與中壓聚乙烯相類似,防潮性好,防止氧氣透過性為中等程度。(3)隔絕異味性較差,防止紫外線透過性為中等。
         

          

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