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水性聚氨酯膠粘劑的常見種類

  隨著人們環境保護意識的不斷增強,環保型的膠粘劑得到了廣泛的使用。水性聚氨酯膠粘劑的牢固性、持久性、柔軟性以及材質的堿溶性較好,是最為常見的環保型產品,其主要類型有有水性粘合劑與無溶劑粘合劑。下面我們就來詳細了解一下這兩種膠粘劑的特性。

  水性聚氨酯的制備方法分為外乳化法和自乳化法。比較而言,外乳化法制備的乳液中,由于親水性小分子乳化劑的殘留,影響固化后聚氨酯膠膜的性能,而自乳化法消除了此弊病。水性聚氨酯的制備目前以離子型自乳化法為主。

  無溶劑粘合劑一般稱作熱熔型粘合劑,為100%由熱塑性樹脂組成,不含任何水分或溶劑,在熔融狀態下可以流動,并在冷卻后具有粘結性能,可方便用于自動化生產過程,提供高的生產率,而且不產生任何環境污染,不對人類造成毒害。

  本文由:http://www.moozlie.com/ 整理發布,轉載請注明出處

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