Oriented films from improved propylene polymers
AssigneeExxon Mobil Chemical Patents Inc.
InventorsAspy Mehta, Michael Chen, Chon-Yie Lin, James Mcalpin, Anthony Speca, Kelly Tormaschy
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AssigneeExxon Mobil Chemical Patents Inc.
InventorsAspy Mehta, Michael Chen, Chon-Yie Lin, James Mcalpin, Anthony Speca, Kelly Tormaschy
Estimating the term…
This invention relates generally to films made from crystalline polypropylene polymers. Specifically, this invention relates to films comprising crystalline polypropylene polymer compositions containing both propylene homopolymers and propylene copolymers. The compositions are prepared using metallocene catalyst systems comprising at least two metallocenes in a polymerization process that involves the sequential or parallel polymerization of propylene homopolymers and copolymers using propylene with a small amount of comonomer, preferably ethylene. The resulting polymers are excellent for use in the production of biaxially oriented films. Films prepared with these propylene polymers have a significantly broader processability range and can be evenly stretched at lower temperature compared to films prepared from traditional polypropylene polymers.
A film comprising a crystalline propylene polymer composition comprising:
An oriented film comprising a crystalline propylene polymer composition comprising:
Dependencies are inferred from the claim text.