刘恩 何彬 李有刚 冉忠祥 郭强

摘 要：由于聚氨酯无溶剂环保胶粘剂作为汽车顶棚骨架成型胶粘剂的推广应用，汽车顶棚湿法制造成型法克服了环保的枷锁而受到顶棚制造商的青睐，汽车顶棚湿法制造工艺其本质就是汽车顶棚骨架成型胶粘剂的施胶工艺。本文通过研究顶棚湿法制造工艺一步成型法成型过程中喷水量/喷胶量、模压温度、模压压力、喷胶喷水后的放置时间对顶棚出模硬度、弯曲强度的影响，分析原因并总结出使顶棚成型达到最佳效果的施胶工艺：（喷水量/喷胶量） %=60%～120%;模压温度≥120℃;模压压力≥0.3MPa;喷胶喷水后的放置时间≤5min。

关键词：聚氨酯;单组分胶粘剂;顶棚;无溶剂胶;湿气固化

中图分类号：TQ339 文献标识码：A 文章编号：1001-5922（2021）05-0013-05

Influence of Sizing Process of One-Step Ceiling Skeleton Forming Adhesive on Ceiling Forming

Liu En， He Bin， Li Yougang， Ran Zhongxiang，Guo Qiang

（Chongqing Zhongke Litai Polymer Materials Co.， Ltd.， Chongqing 401336， China）

Abstract：Because of the popularization and application of polyurethane solvent-free environmentally friendly adhesive as the forming adhesive for automobile roof frame， the automotive roof wet manufacturing molding method overcomes the environmental protection shackles and is favored by roof manufacturers. The essence of the wet manufacturing technology of automobile roof is the sizing process of the car roof frame forming adhesive. In this paper， by studying the influence of water spray amount/gluing amount， molding temperature， molding pressure， and storage time after spraying water on the roof mold hardness and bending strength during the one-step molding process of the ceiling wet manufacturing process. The reasons were analyzed and the  sizing process to achieve the best effect of roof molding was summarized： （water spray / glue spray）% = 60%～120%; molding temperature≥120 ℃; molding pressure ≥0. 3MPa; the storage time after spraying is less than or equal to 5 min.

Key words：polyurethane; single component adhesive; ceiling; solvent-free adhesive; moisture curing

随着聚氨酯无溶剂环保胶粘剂作为汽车顶棚骨架成型胶粘剂的推广应用，汽车顶棚湿法生产克服了环保的枷锁并以其成本低廉、性能优异、成型灵活而受到顶棚制造商的青睐。但由于顶棚湿法生产时间还不长，部分顶棚制造商的设备改造还不彻底，工艺参数积累还不完善，对顶棚成型胶粘剂的工艺性能认识不足，在转型湿法制造过程中出现了较多问题。顶棚骨架成型胶粘剂是聚氨酯无溶剂单组分湿固化胶粘剂，是专为汽车顶棚骨架模压成型而开发的一类胶粘剂，在顶棚基材相同的情况下其工艺性能直接决定整个顶棚成型工艺和性能，因此，汽车顶棚湿法制造工艺其本质就是汽车顶棚骨架成型胶粘剂的施胶工艺。……