ExxonMobil TPV new material can be directly bonded with metal

According to Houston, USA, ExxonMobil's SantopreneTM thermoplastic vulcanizate (TPV) 8291-85TL can be directly bonded to metal to simplify the manufacture of weatherproof seals. This product is particularly suitable for automotive weather sealing applications where metal and TPV surfaces can be combined by a co-extrusion process.

Santoprene TPV 8291-85TL is used as a middle layer of the metal part of the TPV and weatherseal. Because of its strong chemical bond with the metal, it avoids solvent-based primers as well as adhesive systems and volatile organic compounds (VOCs) that they produce.

In general, weathering seals between elastomers and metals are based on bonding between a thermosetting rubber and a commercial binder to form a bond. The use of bonding systems is complex and requires mechanical or sand blowing, chemical vapor removal, solvent for brushing and masking to avoid excessive primers or binders, all of which can affect the sealing functionality and aesthetic appearance. .

Santoprene TPV 8291-85TL builds strong bonds to facilitate the manufacture of high quality complex design parts. Bonded to cold rolled steel, electroplated steel, stainless steel, aluminum, copper and more. Santoprene TPV 8291-85TL can be used for automotive weatherseal applications including metal support conveyor belt seals or divider bars, low window frame seals and door panels. Other non-automotive applications include sealing equipment, fixtures, and acoustic panels.

The bond strength between Santoprene TPV 8291-85TL and stainless steel and aluminum can be compared to a commercial bonding system. In the polished co-extruded product test, the peel strength can reach 30 to 55 pounds per linear inch.