Method of manufacturing hollow plastic ball

Details Method of manufacturing hollow plastic ball Method of manufacturing hollow plastic ball

1976-12-17

1978-01-24

Pavelko, Thomas P.

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

137223, 264278, 264310, 273 65C, 273 65D, A63B 4100, B29C 504

Patent

active

040704343

ABSTRACT:
A method of manufacturing a hollow polyvinyl chloride resin ball. An inflating valve contained in the ball body is made of a plastisol composed mainly of polyethylene-vinyl acetate copolymer and acrylonitrile copolymer. The inflating valve prevents widening of the hole pierced therethrough and maintains an internal air pressure for a long period.

REFERENCES:
patent: 2934344 (1960-04-01), Chupa
patent: 3017670 (1962-01-01), Zweig
patent: 3160691 (1964-12-01), Chupa

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