| 摘要 |
A window for use in a vehicular convertible top comprises a thin, flexible, optically transparent plastic substrate sheet, and a thin, flexible, optically transparent abrasion-resistant protective outer film layer adherently bonded as a permanent coating to both sides of the plastic substrate sheet. The protective outer film layer comprises a weatherable polymer which is transparent in thin film form reacted with a cross-linking agent and blended with a dispersed lubricant to provide a level of abrasion-resistance and a self-lubricating exterior surface to the finished protective outer film. The window withstands repeated folding and unfolding without self-adhesion of the contacting surfaces owing to the release properties provided by the lubricant. In one embodiment, the weatherable polymer comprises a solvent based solution of a polyurethane material reacted with a polyisocyanate cross-linking agent and blended with a polyol-ester glycol-based external lubricant.
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