Patent ID: 7291387

Claim:
A self supporting film of polyolefinic polymer(s), the film having a first and a second surface where a first exposed surface of the film (surface ‘A’) comprises a polymeric low temperature sealable coating (LTSC) and where the second exposed surface of the film (reverse side surface ‘B’) comprises an olefinic polymer capable of forming a seal to the LTSC at a minimum temperature of at most about 100° C. when measured at 15 psi for 2 seconds, such that the first and second surfaces of the film have a mutual heat seal strength (A to B) of at least about 200 g/25 mm, when measured at 15 psi for 2 seconds at 120° C.; where the LTSC also comprises: (a) an anti-block additive in from an effective amount to about 15% by dry weight of the coating to give a static coefficient of friction of less than about 0.9 and a dynamic coefficient of friction less than about 0.75, such the first and second surfaces have a mutual blocking strength (A to B) of less than about 25 g /25 mm measured at 40° C. and 0.5 psi for one hour; (b) a non-ionic anti-mist additive having an HLB value of up to about 20 in an effective amount to about 15% by dry weight of the coating; such that the film exhibits a substantially clear appearance on exposure to a relative humidity of at least 30% at 5° C. after one hour; and (c) optionally an anti-slip additive of a mean particle size of from about 3 to about 5 microns in an effective amount up to about 0.5% by dry weight of the coating.