Abstract 1. AA PROCESS INCLUDING THE STEPS OF: EXTRUDING A MOLTEN FILM-FORMING POLYMER ONTO A COOL QUENCHING SURFACE; STRETCHING THE FILM IN THE MACHINE DIRECTION; EMBOSSING ONE SURFACE OF THE FILM AFTER MACHINE DIRECTION STRETCHING BEFORE TRANSVERSE DIRECTION STRETCHING IN A MANNER WHEREBY TO PERMANENTLY DEFORM ONE SURFACE OF SUCH FILM BY (A) HEATING THE FILM TO A TEMPERATURE RANGE R, BETWEEN THE SECOND ORDER TRANSITION TEMPERATURE AND ABOUT 60 CENTIGRADE DEGREES ABOVE THE SECOND ORDER TRANSITION TEMPERATURE, (B) BRINGING ONLY SUCH ONE SURFACE OF THE FILM INTO MOMENTARY CONTACT WITH AN EMBOSSING SURFACE HAVING A SURFACE FOUGHNESS OF ABOUT FROM 30 TO 500 MIICROINCHES, A.A., AND AT A PRESSURE OF AT LEAST ABOUT 50 POUNDS PER LINEAL INCH, THE EMBOSSING SURFACE BEING HEATED TO AT LEAST TEMPERATURE RANGE R, AND (C) QUENCHING THE EMBOSSED FILM TO BELOW THE SECOND ORDER TRANSITION TEMPERATURE; AND STRETCHING THE PERMANENTLY DEFORMED FILM UP TO ABOUT 4.2X IN THE TRANSVERSE DIRECTION WHEREBY TO PREPARE A BIAXIALLY ORIENTED FILM HAVING ONE SMOOTH AND ONE IRREGULAR SURFACE, SUCH IRREGULAR SURFACE HAING A PATTERN OF FLAT RIDGES THEREON RESULTING FROM THE TRANSVERSE ORIENTATION OF THE FILM AFTER EMBOSSING WHEREBY TO IMPROVE WINDING PROPERTIES OF SUCH FILM.
AA PROCESS INCLUDING THE STEPS OF: EXTRUDING A MOLTEN FILM-FORMING POLYMER ONTO A COOL QUENCHING SURFACE; STRETCHING THE FILM IN THE MACHINE DIRECTION; EMBOSSING ONE SURFACE OF THE FILM AFTER MACHINE DIRECTION STRETCHING BEFORE TRANSVERSE DIRECTION STRETCHING IN A MANNER WHEREBY TO PERMANENTLY DEFORM ONE SURFACE OF SUCH FILM BY (A) HEATING THE FILM TO A TEMPERATURE RANGE R, BETWEEN THE SECOND ORDER TRANSITION TEMPERATURE AND ABOUT 60 CENTIGRADE DEGREES ABOVE THE SECOND ORDER TRANSITION TEMPERATURE, (B) BRINGING ONLY SUCH ONE SURFACE OF THE FILM INTO MOMENTARY CONTACT WITH AN EMBOSSING SURFACE HAVING A SURFACE FOUGHNESS OF ABOUT FROM 30 TO 500 MIICROINCHES, A.A., AND AT A PRESSURE OF AT LEAST ABOUT 50 POUNDS PER LINEAL INCH, THE EMBOSSING SURFACE BEING HEATED TO AT LEAST TEMPERATURE RANGE R, AND (C) QUENCHING THE EMBOSSED FILM TO BELOW THE SECOND ORDER TRANSITION TEMPERATURE; AND STRETCHING THE PERMANENTLY DEFORMED FILM UP TO ABOUT 4.2X IN THE TRANSVERSE DIRECTION WHEREBY TO PREPARE A BIAXIALLY ORIENTED FILM HAVING ONE SMOOTH AND ONE IRREGULAR SURFACE, SUCH IRREGULAR SURFACE HAING A PATTERN OF FLAT RIDGES THEREON RESULTING FROM THE TRANSVERSE ORIENTATION OF THE FILM AFTER EMBOSSING WHEREBY TO IMPROVE WINDING PROPERTIES OF SUCH FILM.
Claim 2
Dependent Claim
197 words
AA PROCESS INCLUDING THE STEPS OF: EXTRUDING A MOLTEN FILM-FORMING POLYMER ONTO A COOL QUENCHING SURFACE; STRETCHING THE FILM IN THE MACHINE DIRECTION; EMBOSSING ONE SURFACE OF THE FILM AFTER MACHINE DIRECTION STRETCHING BEFORE TRANSVERSE DIRECTION STRETCHING IN A MANNER WHEREBY TO PERMANENTLY DEFORM ONE SURFACE OF SUCH FILM BY (A) HEATING THE FILM TO A TEMPERATURE RANGE R, BETWEEN THE SECOND ORDER TRANSITION TEMPERATURE AND ABOUT 60 CENTIGRADE DEGREES ABOVE THE SECOND ORDER TRANSITION TEMPERATURE, (B) BRINGING ONLY SUCH ONE SURFACE OF THE FILM INTO MOMENTARY CONTACT WITH AN EMBOSSING SURFACE HAVING A SURFACE FOUGHNESS OF ABOUT FROM 30 TO 500 MIICROINCHES, A.A., AND AT A PRESSURE OF AT LEAST ABOUT 50 POUNDS PER LINEAL INCH, THE EMBOSSING SURFACE BEING HEATED TO AT LEAST TEMPERATURE RANGE R, AND (C) QUENCHING THE EMBOSSED FILM TO BELOW THE SECOND ORDER TRANSITION TEMPERATURE; AND STRETCHING THE PERMANENTLY DEFORMED FILM UP TO ABOUT 4.2X IN THE TRANSVERSE DIRECTION WHEREBY TO PREPARE A BIAXIALLY ORIENTED FILM HAVING ONE SMOOTH AND ONE IRREGULAR SURFACE, SUCH IRREGULAR SURFACE HAING A PATTERN OF FLAT RIDGES THEREON RESULTING FROM THE TRANSVERSE ORIENTATION OF THE FILM AFTER EMBOSSING WHEREBY TO IMPROVE WINDING PROPERTIES OF SUCH FILM.