Bimodal polyethylene film

Details Bimodal polyethylene film Bimodal polyethylene film

2011-03-01

2011-03-01

Jagannathan, Vasu (Department: 1764)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C428S216000, C502S103000, C502S117000, C502S118000, C502S129000, C502S132000, C502S133000, C525S240000, C526S090000, C526S123100, C526S124200, C526S124300, C526S124400, C526S124500, C526S154000, C526S155000, C526S157000, C526S158000, C526S210000, C526S237000, C526S348000, C526S348200, C526S348600

Reexamination Certificate

active

07897710

ABSTRACT:
Film formed from a polyethylene resin composition which obeys a dynamic rheological relationship at 190° C. between melt storage modulus G′, measured in Pa and at a dynamic frequency where the loss modulus G″=3000 Pa, and dynamic complex viscosity η*100, measured in Pa·s at 100 rad/s, such that (a) G′(G″=3000)>−0.86η*100+z where z=3800, and at the same time (b) G′(G″=3000)>0.875η*100−y where y=650, and having an impact strength (DDT) of at least 250 g, measured on 15 μm thick film (blown under conditions with BUR=5:1 and Neck Height=8×D) conditioned for 48 hours at 20°-25° C., according to ASTM D1709.

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Written Opinion of the International Searching Authority; PCT/EP2005/008798; International Filing Date Aug. 12, 2005; PCT/ISA/237 (5 pgs).

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