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公开(公告)号:US20160305596A1
公开(公告)日:2016-10-20
申请号:US15132568
申请日:2016-04-19
Applicant: SHAWCOR LTD.
Inventor: Roberto VARAGNOLO , Marcos MOCKEL , Catherine LAM , Dennis WONG
CPC classification number: F16L59/028 , B29C47/0004 , B29C47/0042 , B29C47/021 , B29C47/92 , B29C2947/92514 , B29C2947/92704 , B29C2947/92904 , B29K2105/04 , B29L2023/225 , C08J9/228 , C08J9/32 , C08J2201/024 , C08J2201/03 , C08J2203/22 , C08J2300/22 , C08J2323/00 , C08J2325/06 , C08J2327/06 , C08J2355/02 , C08J2369/00 , C08J2371/00 , C08J2375/00 , C08J2377/00 , C08J2379/08 , F16L59/143
Abstract: A method of providing a foamed insulation coating on at least a portion of a pipe, including extruding a melt stream over the pipe portion. The melt stream includes a matrix polymer and expandable fillers in an unexpanded state, the melt stream being maintained at a sufficiently high temperature to maintain the matrix polymer in extrudable form and at a sufficiently high pressure to maintain the expandable fillers in the unexpanded state. Once extruded, the expandable fillers are permitted to expand into an expanded state at a lower pressure.
Abstract translation: 在管的至少一部分上提供发泡绝缘涂层的方法,包括在管部分上挤出熔体流。 熔体流包括基体聚合物和未膨胀状态的可膨胀填料,熔体流保持在足够高的温度下,以将基体聚合物保持在可挤压形式并且处于足够高的压力下以将可膨胀填料保持在未膨胀状态。 一旦被挤出,可膨胀填料被允许在较低压力下膨胀成膨胀状态。