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US 4,105,611 AGranted
Adhesive composition and binding method
AssigneeNorfin, Inc.
InventorGeorge O. Orth, Jr.
Life of this patent
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Abstract
A hotmelt adhesive composition and a method of applying it to bind sheets. The composition comprises by weight 30% to 40% of an ethylene-vinyl acetate copolymer, 25% to 35% of a wax, 20% to 40% of a modified rosin and 10% to 30% of a tackifier. The method of binding sheets comprises aligning the sheet edges, compressing the aligned sheets a short distance from the edges and contacting the edges with the adhesive composition.
Claims9
A hot melt adhesive composition, having a viscosity of less than 5,000 centipoise at 250.degree. F, comprising by weight:
- 30% to 40% of an ethylene-vinyl acetate copolymer;
- 25% to 35% of a wax;
- 20% to 40% of a modified rosin;
- and 10% to 30% of a tackifier which is fluid at room temperature.
1 more element
Dependencies are inferred from the claim text.