Medium modulus polyethylene film and fabrication method

Medium modulus, polyethylene films and bags with improved tear performance are made for heavy-duty packaging applications and hot-fill uses. Film compositions contain high molecular weight linear polyethylene and linear ethylene/ alpha -olefin interpolymer. The film is at least about 1.25 mils (31 m...

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Bibliographische Detailangaben
Hauptverfasser:	CADY, LARRY D, COBLER, BRAD A, MCKINNEY, OSBORNE K, DODSON, LISA E
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	Medium modulus, polyethylene films and bags with improved tear performance are made for heavy-duty packaging applications and hot-fill uses. Film compositions contain high molecular weight linear polyethylene and linear ethylene/ alpha -olefin interpolymer. The film is at least about 1.25 mils (31 microns) thick and is characterized as having a calculated film density in the range of about 0.923 to about 0.95 grams/cubic centimeter (g/cc) and typically has a tear strength or impact resistance at least 30 percent greater than current industrial polyethylene film. The novel film has superior dimensional stability and strength properties which allow significant down-gauging relative to industrial films used as heavy-duty overwraps, sleeves and bags.