Typical Formulation Ingredients
Phase
Ingredient
Parts by weight
A
Metallocene polypropylene (Vistamaxx, ExxonMobil)
A
Hydrocarbon tackifier (Escorez 5000 series, ExxonMobil)
Typical Properties
Brookfield viscosity, cps, at 120° C
Brookfield viscosity, cps, at 140° C
Brookfield viscosity, cps, at 160° C
Peel force, gms, measured at 40°C on nonwoven after spiral spray application at 120° C
Peel force, gms, measured at 40°C on nonwoven after spiral spray application at 140° C
Peel force, gms, measured at 40°C on nonwoven after spiral spray application at 120° C6
Peel force, gms, after 24 hours
Peel force, gms, after 1 month
Peel force, gms, after 14 days
Resulting Properties
Polyolefin hot melt adhesives have good thermal stability (minimal color changes and reduced gel formation on standing in the melter). Ring and ball softening points are generally in the 100° to 130°C range. Melt viscosities can have a wide range due to molecular design and additives. The formulations Metallocene Catalyzed Polyolefin HMA describe hot melt adhesives for hygienic applications that are based on metallocene catalyzed polyolefin. They are suitable for spray applications.
The source of Metallocene Catalyzed Polyolefin HMA (A) for Hygiene Applicationsis ExxonMobil, “Hot Melt Adhesives Using New Metallocene Propylene Performance Polymers”, October 21, 2014.