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This study was conducted to analyze and quantify the effects of accelerated weathering on the surface of various “weatherable” polymers currently utilized for molded-in-color exterior automotive applications. Evaluations consisted of gloss/color retention and surface changes after accelerated weathering exposure, with and without intermittent washing, to simulate product life cycle. Results were found to be affected by both polymer type and interim surface treatments. Data are presented as a means to define specific performance and aesthetic capabilities of these various polymers in a mold-in-color environment to optimize material selection for related component applications.

The purpose of this study was to analyze and quantify the effects of accelerated weathering on the surface of various “weatherable” polymers currently utilized for molded-in-color exterior automotive applications. Evaluations consisted of gloss/color retention and surface changes after accelerated weathering exposure, with and without intermittent washing, to simulate product life cycle. Results were found to be affected by both polymer type and interim surface treatments. Data are presented as a means to define specific performance and aesthetic capabilities of these various polymers in a mold-in-color environment to optimize material selection for related component applications.

The development of the first fully molded, plastic, passenger car door trim panel is discussed in this paper. From the initial styling concept, an attempt is made to explain the various factors that lead to the choice of materials and final part overall design. Special consideration of the interaction of part shape and attachment methods is given. There is also a description of the mold and the molding conditions, and the quality control test procedures established to insure quality production. A prediction of concept acceptability is made in the Summary Section. Also, a suggestion for further developments of plastic surface coatings is made.