ELASTIC STRIP MATERIAL AND PROCESS AND APPARATUS FOR PRODUCING THE SAME

摘要

[PROBLEMS] An elastic strip material which has any of various shapes suitable for use as sealing or cushioning materials and which can have any desired sectional shape according to the intended use; and a process and apparatus which can efficiently mass-produce the material at low cost. [MEANS FOR SOLVING PROBLEMS] The elastic strip material is one obtained by preparing a heat-solidifiable composition comprising as major ingredients a polyurethane prepolymer and a latent solidifying agent obtained by deactivating a solid polyamine, mixing the composition with a gas with pressurizing to thereby obtain a mixture composition fluid (a), foaming the mixture composition fluid (a), and heating the foam to a temperature which is not lower than the critical solidification temperature to solidify the foam so as to mold it into a strip form having a desired sectional shape. The process comprises extruding the mixture composition fluid (a) with a resin extruder (1) to foam it, introducing the foam into a liquid or gaseous heating zone (2), solidifying and shaping the foam into any desired external shape during transfer, and then taking it out of the heating zone (2).