Plastic films

A plastic film having a desirable balance of physical properties is prepared using a pseudohomogeneous linear low density polyethylene (lldpe) resin on a blown film extrusion line. The lldpe used in this invention must have a melt index, I2, of from 0.4 to 0.8 grams per 10 minutes, a base resin dens...

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Bibliographische Detailangaben
Hauptverfasser:	RANADE NAKUL ULHAS, BAYLEY JOHN, SIPOS PETER ANDREW
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING-UP
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Beschreibung
Zusammenfassung:	A plastic film having a desirable balance of physical properties is prepared using a pseudohomogeneous linear low density polyethylene (lldpe) resin on a blown film extrusion line. The lldpe used in this invention must have a melt index, I2, of from 0.4 to 0.8 grams per 10 minutes, a base resin density of from 0.915 to 0.919 grams per cubic centimeter and a copolymer/homopolymer (COHO) ratio of from 3 to 9. The film must be prepared under specific extrusion conditions using a specific annular extrusion die. The film of this invention has a dart impact strength of greater than 600 grams per mil and a machine direction tear strength of greater than 350 grams per mil and is suitable for the preparation of packaging and trash bags.