水性胶、油性胶及热熔胶的区别
发布日期：2024-11-28 22:40:03
水性胶、油性胶和热熔胶的区别是什么？
水性涂层胶是以水作为溶剂将丙烯酸或聚氨酯树脂通过专门的乳化设备,乳化而成的。其最大的优点是:品种多、环保、价格低廉。现在有很多涂层都是用水溶性胶,例如一般的水溶性pa、水溶性pu还有皮膜胶、油感腊感、刮色浆料等功能性浆料。水溶性以其功能性、环保性、和价格低廉,将是今后涂层的方向。缺点是成膜性差、水洗牢度差、pu不能贴热风胶。
油性涂层胶是以油性溶剂(甲苯、dmf、丁酮等)作为溶剂,将丙烯酸或聚氨酯溶解而成。其优点是成膜性好、牢度好，是当前普遍使用的涂层胶。缺点是由于使用了油性溶剂,所以环保方面欠缺一点,特别是现在石油涨价,导致油性溶剂价格一路彪升,大部分的涂层胶由于成本太高,所以使用了比较差的油性溶剂,导致环保不达标,另外随着各国环保标准的进一步提高,所以对涂层胶的环保要求越来越高。
热熔胶是一种可塑性的粘合剂,在一定温度范围内其物理状态随温度改变而改变,而化学特性不变,其无毒无味，属环保型化学产品。热熔胶粘合是利用热熔胶机通过热力把热熔胶熔解,熔胶后的胶成为一种液体,通过热熔胶机的热熔胶管和热熔胶枪,送到被粘合物表面,热熔胶冷却后即完成了粘合。当然要发挥出热熔胶在粘合的优势,必须使用优质热熔胶及相应的质量性能可靠的热熔胶机加以匹配。
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