Elastic strip material and process and apparatus for producing the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
May 24, 2007
app pub date -
Dec 13, 2004
filing date -
Dec 12, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
[OBJECTS] To provide an elastic strip material that has a cross-sectional shape suited to intended uses such as seals or cushions, as well as a method of and an apparatus for mass-producing the strip material efficiently and inexpensively. [MEANS FOR ACHIEVING THE OBJECTS] A heat setting composition is used whose main ingredients are a polyurethane prepolymer and a latent solidifier obtained by deactivating a solid polyamine. A compressed gas is dispersed throughout the composition to give a fluid mixture `a`, that is then foamed and heated to or above a critical temperature to solidify as the strip material. The fluid mixture `a` is extruded from an extruder (1), guided into a liquid or gaseous heating zone (2), caused to solidify during travel within the zone, and shaped at the same time into a desired configuration before discharged from the zone (2).
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