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        當前位置: 首頁 » 大羽塑料薄膜新聞中心 » 大羽新聞中心 » 大羽動態 » 聚氯乙烯(PVC)和聚乙烯(PE)的區別

        聚氯乙烯(PVC)和聚乙烯(PE)的區別

        文章出處:   責任編輯:   發布時間:2016-06-06 08:46:00    點擊數:-   【

        常見的塑料有兩種:一種是聚乙烯薄膜;一種是聚氯乙烯薄膜.用聚乙烯薄膜做成塑料袋是無毒的,可以用來盛裝食物,只是強度差些,且不能經受80℃以上的高溫,并有一定的透氣性,不宜長期用來盛裝茶葉、香料等。用聚氯乙烯薄膜做成的塑料袋有毒性,因而不宜與食品直接接觸。聚氯乙烯塑料常用于做雨衣、鞋底、床罩、窗簾、桌布、手提包等。

        PE熱收縮膜

         鑒別上述塑料袋的簡易方法:

         1、觸摸法:用手摸起來有潤滑感,表面像涂了一層蠟(化學上稱為蠟感),這是無毒的聚乙烯薄膜;而聚氯乙烯薄膜摸起來有些發粘。 

        2、抖動法:用手抖動聲音發脆,是無毒的聚乙烯薄膜;用手抖動聲音低沉的則為聚氯乙烯薄膜塑料袋。 3、燃燒法:遇火即燃,火焰呈黃色,燃燒時有石蠟狀油滴滴落.并有蠟燭燃燒時的氣味,是無毒的聚乙烯薄膜;若不易燃燒,離火即熄滅,火焰呈綠色為聚氯乙烯薄膜塑料袋。

        4、浸水法:將塑料袋浸入水中,用手將其按壓入水后能浮出水面的為無毒的聚乙烯薄膜;沉入水底的為聚氯乙烯薄膜塑料袋。 聚乙烯 英文簡稱PE,它是乙烯的聚合物,無毒。容易著色,化學穩定性好,耐寒,耐輻射,電絕緣性好。它適合做食品和藥物的包裝材料,制作食具、醫療器械,還可做電子工業的絕緣材料等。

         聚氯乙烯 英文簡稱PVC,是氯乙烯的聚合物。它化學穩定性好,耐酸、堿和有些化學藥品的侵蝕。它耐潮濕、耐老化、難燃。它使用時溫度不能超過60℃,在低溫下會變硬。聚氯乙烯分軟質塑料和硬質塑料。軟質的主要制成薄膜,作包裝材料、防雨用品、農用育秧膜等,還能作電纜、電線的絕緣層、人造革制品。硬質的一般制成管材和板材,管材用作水管和輸送耐腐蝕性流體管,板材用作各種貯槽的襯里和地板。 

        PVC有色透明薄膜3

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