| 摘要 |
A body of blown plastisol having an alveolate exterior surface and an unctuous inner surface, and a method of forming the same. The body is formed by heating to a selected temperature within a range of 150 DEG to 420 DEG F. an elongated mandrel having a smooth exterior surface, immersing the mandrel in its heated condition for a period of a predetermined duration in a bath of liquid plastisol which includes a plastisol resin and a chemical blowing agent which decomposes at a temperature above fusion temperature for the resin, removing the mandrel and a body of gelled plastisol formed thereabout from said bath of liquid plastisol and immersing the same for a period of a predetermined duration in a liquid bath maintained at a blowing temperature substantially greater than the fusion temperature for said plastisol and thereafter removing the mandrel and the body from the liquid bath and immersing the same in a relatively cool bath of washing liquid.
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