Write-on film surface and bags having a write-on stripe

Claim 1

A bag comprising a slip agent containing an extruded bag film for forming a bag body and an extruded write-on film bonded to said bag film wherein said write-on film surface comprises a surface treated write-on film wherein the write-on film comprises a physical mixture, without slip agent, of two substantially incompatible polymers, wherein a second polymer is substantially incompatible in a first polymer and wherein said write-on film is extruded and has a surface which is corona-discharge treated and wherein: (1) said bag film is an extruded polyethylene having a density between about 0.915 and about 0.930 grams per cubic centimeter containing between about 500 ppm and about 2500 ppm of a said slip agent; and (2) said extruded write-on film comprises a major amount of at lest one polymer selected from the group consisting of low density polyethylene, high density polyethylene and polypropylene, and a minor amount of at least one polymer or polymeric mixture selected from the group consisting of (1) polyisobutylene, (2) a mixture of polyisobutylene and polypropylene and (3) a mixture of polyisobutylene and high density polyethylene with the proviso that said write-on film as formed is substantially without slip agent and containing between about 3.0 wt. % and about 20 wt. % of a particulate material based on the total weight of the write-on composition.