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BuKePrinting >> Bookprinting >> 印刷覆膜工藝之預塗覆膜

印刷覆膜工藝之預塗覆膜

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2020-09-30 | 456 Views | 🔊 Click to read aloud ❚❚ ▶ | Share:
印刷覆膜工藝之預塗覆膜

印刷覆膜工藝之預塗覆膜

預塗覆膜屬於真正意義上的乾式覆膜。

(1)優點:

無須再調配覆膜膠水,生產方式較簡便不再有烘道加熱工序,只須熱壓即可完成紙塑復合,生產過程中的能耗不大,對材料的適性優於常見的乾式熱壓水性覆膜;

由於具有較強的黏合性,適用於錶面粗糙、凹凸不平的紙張錶面覆膜;

特別耐折疊和抗拉伸,對印後需進行模切、壓痕、凹凸、壓紋等生產加工的適應性較好;

覆膜產品的有害殘留物較少,符合綠色產品環保的要求。


(2)缺點:

塑膜生產製造時已塗布上專用的熱熔膠,製造成本較高,生產成本相對不低,比同類工藝的乾式熱壓水性覆膜高出20%以上;覆膜後的產品耐高溫能力欠佳,特別是進行無線膠訂包本時,持續高溫作業會讓書背處脫膠起泡;蓋粉能力一般,因其固定的預塗膠層無法再加厚,對噴粉過多的大墨量印刷印張,覆膜質量普遍不佳。

乾式覆膜的黏性過強,既是優點也是缺陷,覆膜後的產品較難低成本紙塑分離,易形成飽受爭議的“白色污染”,不是真正意義上的環保覆膜工藝。

印刷覆膜工藝之預塗覆膜
印刷覆膜工藝之預塗覆膜


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