Process for making cross-linked ethylenic polymer foam...

Details Process for making cross-linked ethylenic polymer foam... Process for making cross-linked ethylenic polymer foam...

C - Chemistry, Metallurgy

08

J

C08J 9/14 (2006.01) C08J 9/10 (2006.01)

Patent

CA 2156853

Disclosed is a process for making a cross-linked ethylenic polymer foam structure of an ethylenic polymer material of a cross-linked, substantially linear ethylenic polymer. The substantially linear ethylenic polymer has in an un-crosslinked state: (a) a melt flow ratio, I10/I2 5.63; (b) a molecular weight distribution, Mw/Mn, defined by the equation: Mw/Mn (I10/I2) - 4.63; and (c) a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a linear ethylenic polymer having about the same I2 and Mw/Mn. Further disclosed is a process for making the above foam structure.

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