Investigation on the adhesive mechanism of mounting brackets formed by injection molding with a safety glass insert. Issue 5 (4th April 2021)

• Record Type: Journal Article
• Authors: Liang, Weikang; Xu, Qiongqi; Liu, Qiong; Cui, Zhixiang; Wang, Qianting
• Is Part Of: Journal of adhesion. Volume 97:Issue 5(2021)
• Page Start: 456
• Page End: 476
• Publication Date: 2021-04-04
• Subjects: Glass -- mounting bracket -- injection molding -- diffusion -- interfaces -- mechanical properties of adhesives; Adhesion -- Periodicals; 541.33
• DOI: 10.1080/00218464.2019.1670168
• Languages: English
• ISSNs: 0021-8464

Abstract

ABSTRACT: To address deficiencies in traditional coating and adhesive processes for installing auto safety glasses, mounting brackets for auto safety glass were formed by the insert injection molding process via employing an insert. Specifically, float glass was used as the insert, Chemlok CH456 and CH489 were utilized as the glass primer, and soft polyvinyl chloride (PVC) was adopted as the material for injection molding. The adhesive force of the mounting brackets was measured, and the adhesive behavior of the mounting brackets was characterized using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The results indicated that the adhesive force of the mounting brackets obtained by insert injection molding can be as high as 1027 N. The results showed that the primer located in fracture regions was torn from PVC and the glass. Double-interface adhesion was found between the glass, the primer, and PVC. In particular, the primer and the glass surface formed strong adhesion by mechanical locking, diffusion existed between PVC and the primer, and the diffusion depth was greater than 10 μm. This process greatly shortens the production cycle of the mounting brackets for auto safety glass and greatly improves the adhesive quality of the mounting brackets.