Stretchable film

Patent Name Stretchable Film Patent Applicant ExxonMobil Chemical Patent Company Principal Applicant Address US Texas Inventor S. B. Olson Application (Patent) No. 03821088.6 Date of Application 2003.08.22 Certification Date Approval Notice No. 1678669 Approved Announcement Date 2005.10.05 Specification CD-ROM D0540 Main Classification Number C08J5/18 Classification Number C08J5/18; B32B27/00 Distribution Original Application Number Priority Item 2002.9.5 US 60/408,318 Abstract Disclosed is a stretchable film having polyethylene. The copolymer forms or comprises at least one layer of a polyethylene copolymer having a natural stretch ratio of at least 250%, a natural stretch ratio at a tensile stress of at least 22 MPa, and a second yield tensile stress of at least 12MPa. In certain embodiments, the polyethylene copolymer has a CDBI of at least 70%, a melt index Isub2.16/sub of 0.1 to 15 g/10 min, a density of 0.910 to 0.940 g/cmsup3/sup, and a melt index ratio of Isub21. .6/sub/Isub2.16/sub is 30 to 80, and the Mw/Mn ratio is 2.5 to 5.5. The stretch film is particularly suitable for bundling and packaging applications. Sovereign Items 1. A stretchable film comprising at least one layer comprising a polyethylene copolymer, said film having a natural stretch ratio of at least 250%, a natural stretch ratio having a tensile stress of at least 22 MPa, and second yielding The tensile stress is at least 12 MPa. International Application PCT/US2003/026444 2003.8.22 International Publication WO2004/022634 English 2004.3.18 Date of Entry into the Country Patent Agency China Council for the Promotion of International Trade Patent and Trademark Office Agency Address Agent Deng Yi