European Rubber Journal NORTHVILLE, Mich.-Frame-less door systems may not be new, but they are all the rage. Cooper-Standard Automotive Inc. is among the companies seeing increased demand for frame-less sealing in the high-end automotive market. It's a trend driven mainly by sustainability and electrification. Frameless designs found initial applications in niche markets-namely sporty two-door coupes and convertibles-before showing up on four-door sedans.
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