Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1978-12-21
1980-12-09
Thurlow, Jeffery R.
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
264126, 264209, 264211, 264323, 264331, 425461, 428372, 428401, B29D 2301, B29F 304
Patent
active
042385385
ABSTRACT:
A method of forming a shaped article from non-melt fabricatable, high temperature, polymeric (polyimide and polyamide) resins, using an apparatus including a die with compaction, back pressure and relief zone. Such resins are ram-extruded at a temperature of between about 20.degree. C. and 400.degree. C., but below the second order glass transition temperature of the resin to form a shaped article, followed by heating at a temperature above about 250.degree. C. for a time sufficient to coalesce the resin. Such method and apparatus is particularly well-suited to produce close tolerance articles of precise dimensions, such as rods and tubes.
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E. I. Du Pont de Nemours and Company
Thurlow Jeffery R.
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