Multilayer packaging film

Details Multilayer packaging film Multilayer packaging film

1995-09-25

1998-04-07

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

428910, 426127, 426396, B32B 2732, B65B 1100

Patent

active

057362602

ABSTRACT:
A laminated film useful for packaging includes two outer layers and a core layer of a polypropylene resin interposed therebetween. Each of the outer layers includes (A) an ethylene-.alpha.-olefin copolymer having a density of less than 0.910 g/cm.sup.3 but not less than 0.870 g/cm.sup.3 and an ethylene content of at least 50 mol % and showing only one endothermic peak when analyzed by differential scanning calorimetry (DSC), (B) an ethylene-.alpha.-olefin copolymer having a density of 0.910-0.935 g/cm.sup.3 and an ethylene content of at least 50 mol %, and (C) an anti-fogging agent. The density of (B) is greater by at least 0.008 g/cm.sup.3 than that of (A).

REFERENCES:
patent: 4643928 (1987-02-01), Kimura et al.
patent: 5279872 (1994-01-01), Ralph
patent: 5300353 (1994-04-01), Yoshimura et al.
patent: 5366796 (1994-11-01), Murschall
patent: 5376439 (1994-12-01), Hodgson et al.
patent: 5491019 (1996-02-01), Kuo
Van der Sanden et al. "A new family of linear ethylene polymers provides enhanced sealing performance", Tapi Journal pp. 99-103 Feb. 1992.

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