关键词: 汽车涂层；防火布；漆面缩孔；硅橡胶粉末

Abstract: While automotive coatings serve protective, decorative, and other specific functions for the vehicle body, coating defects can severely compromise their performance. Paint shrinkage, as a common defect, poses significant challenges to the automotive coating industry. These challenges are primarily reflected in the extended investigation cycle required to identify the cause of shrinkage, substantial economic losses due to rework, and disruption of production schedules affecting product delivery. This paper conducts extensive on-site experiments and investigations from various aspects including the environment, materials, processes, and equipment. It outlines specific approaches and methodologies for investigating shrinkage defects. Furthermore, it identifies that silicone rubber powder from fireproof cloth can induce shrinkage and revealed the conditions under which it occurs. This discovery fills a research gap regarding the relationship between silicone rubber powder and paint shrinkage.

Key words: automotive coating; fireproof cloth; paint shrinkage; silicone rubber powder