Orevac® 18751

OREVAC 18751 is a coextrusion coating adhesive based on a maleic anhydride modified polypropylene resin. It combines the processibility of an extrusion coating resin with the thermal resistance of polypropylenes. OREVAC 18751 is available in pellet form for use in conventional extrusion and coextrusion equipment designed to process polyolefins.
OREVAC 18751 is a tie resin to be used in extrusion coating and extrusion lamination technologies. It has been desinged to develop adhesion in these processes onto substrates like aluminium foil*, paper or PP films and in coextrusion with resins like PP and PA. OREVAC 18751 exhibits excellent processing properties, particularly regarding drawability, neck-in and melt stability. In addition to adhesive properties, the special formulation of OREVAC 18751 allows to desing aluminium lids for PP or PP coated cups and containers with controlled opening forces**.
*Adhesion performance to aluminium foil is strongly dependant on thermal conditions in the laminator. Standard conditions of coating onto cold aluminium foil require to use a specific post heating treatment in whicj Orevac layer must be molten again.
**Compared to the other extrusion coating grade OREVAC 18750, OREVAC 18751 is slightly more crystalline, elading to higher elastic modulus, higher yield strength and thus, higher opening forces in lids applications.