Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1980-02-29
1983-06-28
Derrington, James H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
264303, 264305, 264306, 264307, B29C 1300
Patent
active
043904920
ABSTRACT:
A method and apparatus provided for manufacturing elastomer gloves having percentage elongation of at least 300%. In order to prevent excess deposits of the polymer latex in the areas of the tips of the fingers and the webs between the fingers when the hand-shaped molds are coated, by dipping, with the polymer, the surfaces of the mold in these areas are formed as non-rounded, non-horizontal inclined surfaces which join at an apex and define an included angle therebetween. This arrangement prevents the pooling of the polymer latex in the areas in question, this pooling being the cause of the excess deposits and being characteristic of prior molds of this general type. In order to provide sufficient coagulant around the sharp corners formed in the areas of the tips of the fingers and the webs between the fingers so as to provide sufficient coating in those areas, it is necessary to use a heated mold and to provide sufficient dwell time and withdrawal time for the mold from the coating baths during the process.
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Bioresearch Inc.
Derrington James H.
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