| 摘要 |
A sewn cover assembly of a type that is to undergo a foaming process involving injection and curing of a liquid foaming material therein. The cover assembly is formed by sewing together plural cover elements via two different sewing threads, using a sewing machine, so as to completely close and seal the needle holes formed therein against leakage of the liquid foaming material through the needle holes. Namely, one of the two threads used is large in thickness relative to another of them, thereby serving as a leakage preventive member in addition to being a sewing thread. A foamed product is also disclosed, which is formed by injecting and curing a liquid foaming material in such sewn cover assembly.
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