초록

Microporous material substrate comprising (1) a matrix consisting essentially of linear ultrahigh molecular weight polyolefin, (2) a large proportion of finely divided water-insoluble siliceous filler, and (3) interconnecting pores is printed with printing ink.

대표청구항 ▼

Printed microporous material comprising: (a) a microporous material substrate having at least one surface and comprising: (1) a matrix consisting essentially of essentially linear ultrahigh molecular weight polyolefin which is essentially linear ultrahigh molecular weight polyethylene having an intr

Printed microporous material comprising: (a) a microporous material substrate having at least one surface and comprising: (1) a matrix consisting essentially of essentially linear ultrahigh molecular weight polyolefin which is essentially linear ultrahigh molecular weight polyethylene having an intrinsic viscosity of at least about 18 deciliters/gram, essentially linear ultrahigh molecular weight polypropylene having an intrinsic viscosity of at least about 6 deciliters/gram, or a mixture thereof, (2) finely divided particulate substantially water-insoluble siliceous filler distributed throughout said matrix, said filler constituting from about 50 percent to about 90 percent by weight of said microporous material substrate, and (3) a network of interconnecting pores communicating throughout said microporous material substrate, said pores constituting at least about 35 percent by volume of said microporous material substrate, and (b) printing ink on at least a portion of said surface in the form of indicia, one or more patterns, one or more designs, or a combination thereof.