Ethylene polymer and fuel tank comprising the same

Details Ethylene polymer and fuel tank comprising the same Ethylene polymer and fuel tank comprising the same

1995-03-31

1996-08-20

Yoon, Tae

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 367, 4284761, 428516, 428520, 220 413, 220 414, 220415, B65D 8812, B32B 2732, B32B 2734

Patent

active

055477224

ABSTRACT:
An ethylene homopolymer or copolymer comprising ethylene and not more than 10% by weight of an .alpha.-olefin having from 3 to 20 carbon atoms and a fuel tank obtained therefrom are disclosed, said ethylene homopolymer or copolymer having (1) an intrinsic viscosity [.eta.] of from 2 to 6 dl/g, (2) a density of from 0.945 to 0.970 g/cm.sup.3, (3) an R value of from 2.5 to 4, said R value being defined as a .sigma..sub.2 /.rho..sub.1 ratio, wherein .sigma..sub.1 and .sigma..sub.2 mean stress in elongation with a strain at 2 sec and 4 sec, respectively, under a flow at an elongational strain rate .epsilon. of 0.5 sec.sup.-1, and (4) a relationship between high-velocity impact strength (HRI-IZOD) measured at -30.degree. C. and a melt index under a load of 21.6 kg (HLMI) satisfying formula:

REFERENCES:
patent: 5073420 (1991-12-01), Yano et al.
patent: 5384172 (1995-01-01), Takado et al.
patent: 5441781 (1995-08-01), Uchida et al.

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