The plastics industry encompasses much more than you think. Almost every object you touch or see every day has at least one plastic component. Your car, more specifically, has a lot of plastic parts – some of which are made with injection molding! The article below discusses a new thermoplastic elastomer (TPE) series that can be installed around car windows. Keep reading to learn about it!
New TPE series offers strong adhesion with EPDM rubber
The automotive industry is the largest and fastest-growing market for thermoplastic elastomers (TPE). New applications exist for door and window seals, which require dimensionally stable corner joints and end elements. This has been achieved in the past with styrene-butadiene compounds (SBC) and crosslinked thermoplastic vulcanized (TPV) rubber. The cost-effectiveness of TPV is limited, however, due to diverse factors in the manufacturing process, in particular the window trim. The EPDM adhesion series from Kraiburg TPE offers a good alternative with added value.
The core requirements for corner joints and end elements of window trim profiles include excellent adhesion and weathering resistance, which are ensured by the long-term process stability of the TPE/rubber connection. It is also necessary to minimize the injection temperature of the TPE solutions in order to reduce the cooling and cycle times of the 2-component elements.
The AD/EPDM/UV series fulfils all of these requirements by combining optimal adhesion properties with long-term resistance to UV radiation and thermal effects with a hardness of 70 Shore A. Compared to competitive materials, these special TPE products exhibit superior stability. The EPDM profile is neither compressed, nor destroyed or deformed. The compounds feature uniform color fastness versus EPDM and there is no tendency of stickiness or phase separation.
Kraiburg TPE has examined the suitability of the new materials in comprehensive adhesion, weather exposure and thermal ageing tests. The processing properties and stability were optimized in close cooperation with the machine and mold manufacturers. “Our tests showed that the cleanliness of the EPDM contact surfaces with the TPE are crucial in these two-component elements and that freshly cut seal profiles result in optimal adhesion.”
The AD/EPDM/UV technology is already being tested by several customers in the automotive industry.