Abstract: A multilayer cast film includes a cling layer, a release layer, and at least one core layer disposed between and contacting the cling layer and the release layer. The cling layer includes an ultra low density polyethylene (ULDPE), a propylene interpolymer, or blends thereof. The release layer includes a first linear low density polyethylene (first LLDPE) having a density of from 0.915 to 0.938 g/cc and a melt index of from 0.5 g/10 min to 10 g/10 min. Each of the core layers includes a second linear low density polyethylene (second LLDPE) having a density of from 0.905 to 0.930 g/cc and a melt index of from 0.5 g/10 min to 10 g/10 min. The multilayer cast film includes from 3 wt % to 7 wt %, based on a total amount of polymers present in the multilayer cast film, of the low density polyethylene (LDPE).

Abstract: The invention includes a composition comprising from 40 to 98 weight percent of at least one GPPS, from 0 to 98 weight percent of at least one HIPS, from 0.5 to 10 weight percent at least one styrene block copolymer, from 0.5 to 10 weight percent of at least one polypropylene wherein the combination of GPPS, HIPS, polypropylene and styrene block copolymer make up at least about 90 percent of the composition as well as a film made of the composition, an envelope window patch comprising the film, an envelope comprising the window patch, and a process for making the film.