A water repellent PP film or foam panel is used inside every single auto door. The PP film or foam panel can prevent water from entering into an auto interior during raining or car washing. Conventionally, butyl rubber-based sealant is used to bond these PP films or foam panels onto the door body. Butyl rubber-based sealant does offer excellent moisture impermeability. However, its low cohesion characteristic is not favorable for repositioning purpose in the after service market. The PP film or foam panel should be removable and re-mountable easily without scarifying moisture impermeability after repairing.

Hot melt pressure sensitive adhesives (HMPSAs) have been introduced to this application area in the past few years. Since SBC-based HMPSA is much more elastic than butyl rubber-based sealant… Read Complete Article>>

Foam-able HMPSA Used on Foam Panels for Automobile Doors
- by Pierce Covert, Glue Machinery Corporation