Polyethylene resin composition for heavy-duty packaging bag and

Details Polyethylene resin composition for heavy-duty packaging bag and Polyethylene resin composition for heavy-duty packaging bag and

1996-03-28

1998-05-26

Thibodeau, Paul J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

525240, C08L 2308

Patent

active

057561931

ABSTRACT:
Disclosed is a polyethylene resin composition for heavy-duty packaging bag, which has a specific MFR, a specific density and a specific melt tension and which comprises (I) a linear low-density polyethylene resin prepared from ethylene and an .alpha.-olefin of 4 or more carbon atoms and having a specific MFR, a specific molecular weight distribution and a density of 0.900 to 0.918 g/cm.sup.3, (II) a linear medium or high-density polyethylene resin having a density of 0.935 to 0.970 g/cm.sup.3 and (III) a high-pressure low-density polyethylene resin having a density of 0.915 to 0.924 g/cm.sup.3, in a specific ratio of components. Also disclosed is a polyethylene resin film prepared from said composition. The composition is able to provide a film which is excellent in low-temperature properties such as low-temperature drop-bag strength and can be advantageously used for a heavy-duty packaging bag even in a cold district of below-freezing temperature. The polyethylene resin film exerts the above-mentioned effects.

REFERENCES:
patent: 5089322 (1992-02-01), Matsunaga et al.
patent: 5321106 (1994-06-01), LaPointe
Van der Sanden et al., "A New Family of Linear Ethylene Polymers Provides Enhanced Sealing Performance" Tappi Journal, pp. 99-103, Feb. 1992.
Schut, "Enter a New Generation of Polyolefins" Plastics Technology, pp. 15-17, Nov. 1991.
Derwent World Patents Index, Abstract of Japanese Laid-Open Patent Publication No. 08-208895 (Aug. 13, 1996).

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