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防雨養(yǎng)殖大棚保溫被如何防潮

發(fā)布者：鳳凰新聞網(wǎng) 發(fā)布時間：2018-07-16 08:25:13 訪問次數(shù)：89

目前，國內(nèi)的食品包裝袋一般可分為單膜袋和復(fù)合薄膜包裝袋兩大類。其主要執(zhí)行標準有：GB/T4456-1996《包裝用聚乙烯吹塑薄膜》、GB12025-1989《高密度聚乙烯吹塑薄膜》、QB/T2461-1999《包裝用降解聚乙烯薄膜》、GB9687-1988《食品包裝用聚乙烯成型品衛(wèi)生標準》、GB9688-1988《食品包裝用聚丙烯成型品衛(wèi)生標準》等。

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來源：鳳凰新聞網(wǎng)

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