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Steward M.,Jyco Sealing Technologies | Singher B.,Jyco Sealing Technologies | Jyawook S.,Jyco Sealing Technologies | Browell J.,Jyco Sealing Technologies | Kameyama J.,Jyco Sealing Technologies
Rubber World | Year: 2011

Thermoplastic vulcanizates (TPV) are used in increasing volume to manufacture automotive sunroof seals. The compressive properties of TPV exceed the performance demands in a sunroof sealing environment. Typically, the sealing gap in a sunroof is between four to six millimeters. When compared to an EPDM sunroof seal with the same cross-sectional design, the TPV sunroof seal shows improvements in load loss set. In this comparison, it is important to note that sections of both the TPV and EPDM sunroof seal were the same. The compression set of a sunroof seal is dependent upon both the design and properties of the materials used in its construction. A sunroof seal to glass and painted metal surface coefficient of friction as low as 0.2 can be achieved. In addition to good frictional properties, this non-stick layer reduces unsightly seal material transfer to glass and also improves the already good water absorption from a non-top layered TPV less than one tenth of a percent.

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