Method for continuously preparing crosslinked foamed polyolefin tubular body

Abstract

Abstract PURPOSE:To continuously obtain the title tubular body in good efficiency, by a method wherein a polyolefin composition, containing an org. peroxide and a foaming agent is molded into a tubular form in a long land die while a lubricant is supplied thereto as well as the obtained molded object is foamed by reducing pressure after crosslinking. CONSTITUTION:A composition containing an org. peroxide (e.g. cumylperoxide) and a foaming agent (e.g. azodicarbonamide) is molded into a tubular form in the long land die of a long land die apparatus while a lubricant (e.g. polyethylene glycol lauryl ether) is supplied to the inner surface of said long land die as well as, after crosslinking, the resulting crosslinked molded article is foamed by exposing to pressure lower than die internal pressure and further passed through a sizing die to obtain an objective crosslinked foamed body.

Inventors

• 👤 Masaki Matsui
• 👤 松井　正毅
• 👤 Yukio Morita
• 👤 幸雄 森田

Bibliographic Details