| abstract |
(57) [Problem] To be able to easily and surely insert even a curved pipe to the outer peripheral surface thereof, that is, it has excellent insertability and dimensions after being fitted to the pipe. A tubular foam suitable for a heat insulating material for a refrigerant pipe having excellent stability is provided. SOLUTION: The tubular foam is obtained by subjecting an ethylene-vinyl acetate copolymer to silane graft crosslinking, and has an apparent density of 0.1. It is formed from a crosslinked foam of 02 to 0.065 g / cm 3 . |