GAS-ASSISTED CO-INJECTION MOLDED CHAIR
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United States of America Patent
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Issued Date -
May 22, 2014
app pub date -
Jan 24, 2014
filing date -
May 11, 2010
priority date (Note) -
Abandoned
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Abstract
The invention is directed to a method and article made from co-injection molding using gas-assist. The article has an inner material and an outer material. The inner material has a blowing agent uniformly distributed throughout the inner material. The outer material surrounds the inner material. At least one opening is provided in the outer material. The opening extends through the outer material to the inner material providing a pathway which allows out gas generated by the blowing agent in the inner material to escape through the outer material when the article is in a mold and after the article has been removed from the mold. The outer material provides an aesthetically pleasing outer surface and the inner material provides a strong core which is free of large voids, the inner and outer materials combining to form an article with a stable profile and repeatable size.
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