Modified resins for blown film
AssigneeFina Technology, Inc.
InventorsRodolfo Mier, Mark B. Miller
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Abstract
Processes for enhancing blown film processability and the blown films formed thereby are described herein. One embodiment of the processes generally includes providing a first propylene based heterophasic copolymer having a first melt flow rate, modifying the first propylene based heterophasic copolymer to form a second heterophasic polymer having a second melt flow rate, wherein the second melt flow rate is greater than the first melt flow rate, contacting the first heterophasic polymer, the second heterophasic copolymer or a combination thereof with a plurality of additives, wherein the plurality of additives include a nucleator, polyethylene and mineral oil to form a modified heterophasic copolymer and blowing the modified heterophasic polymer into a film.
Claims19
A process for enhancing blown film processability comprising:
- providing a propylene based heterophasic copolymer, wherein the propylene based heterophasic copolymer comprises a melt flow rate of at least about 1.0 dg/min.;
- forming a modified resin by contacting the propylene based heterophasic copolymer with a polyethylene and from 1 wt. % to 8 wt. % of a mineral oil, wherein the propylene based heterophasic copolymer that is contacted with the polyethylene and the mineral oil is unsubstituted;
- and
- blowing the modified resin into a film, wherein the film comprises more polyethylene than propylene based heterophasic copolymer.
A process for enhancing blown film processability comprising:
- providing an unsubstituted propylene based heterophasic copolymer, wherein the unsubstituted propylene based heterophasic copolymer comprises a melt flow rate of at least about 1.0 dg/min.;
- contacting the unsubstituted propylene based heterophasic copolymer with a polyethylene and optionally with from 1 wt. % to 8 wt. % of a mineral oil, forming a modified resin;
- and
- blowing the modified resin into a film.
Dependencies are inferred from the claim text.