Stretch film

Details Stretch film Stretch film

2003-08-22

2009-10-13

Patterson, Marc A (Department: 1794)

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

C428S034100, C428S034200, C428S035900, C428S036920, C428S500000, C428S515000, C428S521000, C428S523000, C526S088000, C526S160000, C526S340200, C526S348000, C526S348100, C526S348200, C526S943000

Reexamination Certificate

active

07601409

ABSTRACT:
Stretch films are disclosed, the films having at least one layer formed of or including a polyethylene copolymer and having a natural draw ratio of at least 250%, a tensile stress at the natural draw ratio of at least 22 MPa, and a tensile stress at second yield of at least 12 MPa. In some embodiments, the polyethylene copolymer can have a CDBI of at least 70%, a melt index I2.16of from 0.1 to 15 g/10 min., a density of from 0.910 to 0.940 g/cm3, a melt index ratio I21.6/I2.16of from 30 to 80, and an Mw/Mn ratio of from 2.5 to 5.5. The stretch films are particularly useful in bundling and packaging applications.

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