Heat seal modifiers for linear polyethylenes

Details Heat seal modifiers for linear polyethylenes Heat seal modifiers for linear polyethylenes

2004-12-16

2009-12-22

Nutter, Nathan M (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S240000, C524S271000, C524S272000, C524S500000, C524S502000, C524S515000

Reexamination Certificate

active

07635736

ABSTRACT:
The present invention is linear polyethylene composition suitable for use as a heat seal resin, wherein the resin comprises: (a) from about 70 wt % to about 90 wt % of a linear polyethylene having a density of from about 0.88 to about 0.92 g/cm3; (b) from about 0 wt % to about 30 wt % of a copolymer of ethylene and an α,β-unsaturated carboxylic acid and/or an ionomer thereof; and, (c) from about 2 wt % to about 10 wt % of a tackifier.

REFERENCES:
patent: 4337298 (1982-06-01), Karim et al.
patent: 6120887 (2000-09-01), Werenicz et al.
patent: 2002/0146526 (2002-10-01), Haner et al.
patent: 1344642 (2003-09-01), None
patent: 1982/008234 (1982-01-01), None
patent: 7060921 (1995-03-01), None
patent: 465778 (1991-10-01), None
PCT International Search Report for International Application No. PCT/US2004/043064 dated Jul. 5, 2005.

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