Comparative Study of Ionomer, Acid Copolymer, and EVA Resins vs. LLDPE, ULDPE & A Metallocene Polyethylene Sealants's, 1993 Polymers, Laminations & Coatings Conference Proceedings
J. R. de Garavilla
Selected ethylene copolymers and ionomers were compared with several linear polyethylene sealants, including a metallocene polyethylene resin, in an assessment of resin processability and film properties that are key to the flexible packaging industry. Physical property testing and heat seal performance were measured using monolayer blown film samples, while the hot tack performance was characterized for each sealant as laminated to polyester film.
The results of this study reconfirm that ionomers and acid copolymers provide the packaging industry with the best overall balance of extrusion processability, physical properties, heat sealability and hot tack performance. Moreover, the data confirm that the narrow molecular weight distribution, metallocene polyethylene resin has low melt strength and high power consumption rates relative to conventional heterogeneous linear PE sealants.
Comparative Study of Ionomer, Acid Copolymer, and EVA Resins vs. LLDPE, ULDPE & A Metallocene Polyet