Browse Topic: Interior molding and trim
This test can be used to determine the resistance to scuffing of test specimens such as fiberboards, fabrics, vinyl-coated fabrics, leathers, and similar trim materials.
Prefabricated headliners are now completely accepted in Europe and have almost fully substituted conventional suspension headliners. This success in the European marked did however take some time. The headliner versions developed in the USA and Japan provided guidelines for the European development. The initial reason for using prefabricated headliners came from the assembly line. It was necessary to make it easier for workers to fit the headliner into the car. But there was a second important argument which still applies: cost reduction. The cost reduction argument became the pet of all who had developed a prefabricated headliner. This is ultimately the reason why in the early days of the changeover to the new system only very cheap solutions were ever discussed. This demand has since remained the most important challenge for all innovative steps.
The use of low density urethane foam composites in automotive interior trim is an established technology. In existing applications such as door trim panels, increasing production volumes are providing the impetus for process modifications and improved formulations. In emerging applications such as instrument panel covers new performance requirements must be met. The development of new Baydur STR/F formulations to address these needs are discussed.
The purpose of this paper is to review current laboratory test methods for conducting artificial weathering of vinyl/foam composites as specified by major automotive manufacturers for instrument panel components. Critical test parameters for each method, including spectral irradiation (ultraviolet, visible, and infrared components), light/dark cycles, ambient temperatures, black panel temperatures, and moisture levels are reviewed. The mechanisms by which these test conditions are controlled are discussed. The subjectivity of criteria used to judge whether test results are considered passes or failures are discussed and alternative quantitative methods suggested. The need for uniform weatherability test standards throughout the automotive industry is considered in terms of the implications on automotive supplier material development efforts. The technical validity of commonly chosen test parameters used to accelerate weatherability studies is revisited for the purpose of understanding
This paper discusses the effect of various individual and combinations of thermal Stabilizers and their effect on polymer properties. We will show the effect on initial molded properties with various stabilizers, and how the proper balance of stabilization can enhance the long term heat aged properties on both ASTM test specimens and also on actual large molded part performance. Physical Properties investigated are those of Izod, multi-axial impact, tensile and flexural properties over a range of aging times and temperatures.
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