Mandrel, method of use thereof and production method thereof
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United States of America Patent
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Jul 1, 2008
Grant Date -
Aug 3, 2006
app pub date -
Feb 1, 2005
filing date -
Feb 1, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An object of the present invention is to provide a novel mandrel using a used mandrel, a method of use thereof and a production method thereof. The mandrel of the present invention has an inner layer formed from a thermoplastic resin composition containing an age resister and an outer layer made from a thermoplastic resin which covers the outer circumference of the inner layer. Preferably, the mandrel of the present invention is used for forming a rubber hose and preferably, the inner layer of the mandrel of the present invention is made from a thermoplastic composition obtained by pulverizing a used mandrel for forming a rubber hose.
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