| 摘要 |
Disclosed is an apparatus for controlling the temperature of a melt stream, a method of using the apparatus to make variable-density polymeric articles, and the polymeric article formed thereby. The apparatus for making the article includes a row of baffles wherein the baffles include a temperature-control conduit defined or disposed within at least one of the baffles. A polymer melt is passed through the apparatus while the temperature of the baffles is varied (which has the effect of altering the density of certain polymer melts). The process can be used to yield a continuous, monolithic polymeric article of variable density. The apparatus can also be used to control the temperature of the material passing through the apparatus.
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