Heat-sealable polyolefins and articles made therefrom

Details Heat-sealable polyolefins and articles made therefrom Heat-sealable polyolefins and articles made therefrom

2005-08-05

2008-12-02

Teskin, Fred (Department: 1796)

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

Synthetic resins

Treating polymer containing material or treating a solid...

C526S113000, C526S352000, C428S035200, C428S035500, C428S035700, C428S516000, C156S308400

Reexamination Certificate

active

07459521

ABSTRACT:
Polyolefins, preferably polyethylene, having a density of about 0.86 to about 0.93 g/mL, having three or more or branches of the formula (CH2CH2)mH wherein m is an integer of one or more, provided that said branched polyolefin has one both of the following properties: said branched polyolefin contains less than 2 methyl groups per 1000 methyl-ene atoms and at least 30 total branches per 1000 methylene groups; said branched polyolefin contains less than 0.3 branches of the formula —(CH2)5H per 1000 methylene groups; and in said branched polyolefin the level hexyl+ branches is at least 80% of the level of ethyl branches, and said polyolefin contains less than 2 methyl branches per 1000 methylene groups or less than 0.3 branches of the formula —(CH2)4CH3per 1000 me-thylene groups or both, thereby allowing good seals to be formed rapidly. This is advantageous when heat sealing these polyolefins, for example in the form of single or multilayer films.

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