Rust preventive film for stretch packaging

Details Rust preventive film for stretch packaging Rust preventive film for stretch packaging

2007-03-20

2007-03-20

Nakarani, D. S. (Department: 1773)

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

C428S523000

Reexamination Certificate

active

10499050

ABSTRACT:
The stretch film for rustproof stretch packaging has an appropriate roll tack and sufficient self-tack to adhere to and package an object, such as a steel coil. This stretch film has an overall density of 0.870 to 0.935 g/cm3and is composed of polyolefin resin, rust preventive agents, and an effective amount of a polyolefin polyol adhesive with a number average molecular weight of 500 to 5,000 g/mol. When the film has at least three layers, one surface layer has a density of 0.850 to 0.920 g/cm3, and another surface lever on the opposite side of the film and intermediate layers between them have greater densities. The polyolefin polyol adhesive and the rust preventive agents are present at least in the low density surface layer.

REFERENCES:
patent: 6132827 (2000-10-01), Miro
patent: 6224957 (2001-05-01), Crook et al.
patent: 0 140 121 (1985-05-01), None
patent: 51-25547 (1976-03-01), None
patent: 2000-326455 (2000-11-01), None
patent: 2001-341238 (2001-12-01), None
Polytail Low Molecular Weight Polyolefin Polyol, Mitsubishi Chemical Corporation (In English (Admitted Prior Art), Publication date Not Available.

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