Polypropylene spa shell manufacturing method

Details Polypropylene spa shell manufacturing method Polypropylene spa shell manufacturing method

1994-07-29

1996-05-07

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Flame contact or reshaping by heat decomposition of work

264 464, 264 468, 264512, 264514, 264553, 156 82, 427223, B29C 5110, B29C 5114

Patent

active

055143156

ABSTRACT:
A process of forming a spa shell by selecting a coextruded polypropylene sheet, selectively heating the sheet, vacuum forming the heated sheet on a deep draw female mold to form a molded spa shell shape, flame treating one surface of the molded shell shape, heating the flame-treated surface, and applying a layer of polyurethane foam to the heated surface.

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