초록 ▼

Disclosed is an ethylene polymer foam structure having enhanced processing and physical properties. The foam structure comprises an ethylenic polymer material and a blowing agent. The blowing agent has a primary blowing agent of isobutane and a secondary blowing agent of 1,1,1-trifluoroethane, 1,1,1

Disclosed is an ethylene polymer foam structure having enhanced processing and physical properties. The foam structure comprises an ethylenic polymer material and a blowing agent. The blowing agent has a primary blowing agent of isobutane and a secondary blowing agent of 1,1,1-trifluoroethane, 1,1,1,2-tetrafluoroethane, or a blend of them. Further disclosed is a process for making the foam structure.

대표청구항 ▼

A process for making an ethylene polymer foam structure, comprising: a) heating an ethylene polymer material comprising greater than 50 percent by weight ethylene monomeric units to form a melt polymer material; b) incorporating into the melt polymer material at an elevated pressure a blowing agent

A process for making an ethylene polymer foam structure, comprising: a) heating an ethylene polymer material comprising greater than 50 percent by weight ethylene monomeric units to form a melt polymer material; b) incorporating into the melt polymer material at an elevated pressure a blowing agent comprising a primary blowing agent of isobutane and a secondary blowing agent selected from the group consisting of 1,1,1-trifluoroethane, 1,1,1,2-tetrafluoroethane, and a blend of the foregoing to form a foamable gel; and c) expanding the foamable gel at a lower pressure to form a foam structure.