Starch based hot melt adhesives for cigarettes
AssigneeNational Starch and Chemical Investment Holding Corporation
InventorsThomas F. Kauffman, Joseph Wieczorek, Jr., Stephen F. Hatfield
Life of this patent
Estimating the term…
Abstract
In a process for manufacturing degradable cigarette filters wherein adhesive is applied to at least one longitudinal edge of the plug wrap paper, a bond is made while the adhesive is molten and the resultant bond is held in compression for sufficient time to prevent bond movement, the improvement which comprises, using as the adhesive, from about 20 to 60% by weight of an intermediate or high DS starch ester having from about 2 to 18 carbon atoms in the ester component and a DS (degree of substitution) of from about 0.3 to 2.5, 5 to 40% by weight of a polar wax, 5 to 50% by weight of a plasticizing diluent, 0 to 25% by weight of a compatible tackifier and 0 to 3% by weight of an antioxidant.
Claims9
In a process for manufacturing degradable cigarette filters wherein bloomed tow in the form of a tube and containing triacetin is wrapped in plug wrap paper, adhesive is applied to at least one longitudinal edge of the plug wrap paper, a bond is made while the adhesive is molten and the resultant bond is held in compression for sufficient time to prevent bond movement, the improvement which comprises, using as the adhesive, a water sensitive hot melt adhesive comprising 20 to 60% by weight of an intermediate or high DS starch ester having from about 2 to 18 carbon atoms in the ester component and a DS (degree of substitution) of from about 0.3 to 2.5, 5 to 40% by weight of a polar wax, 5 to 50% by weight of a plasticizing diluent, 0 to 25% by weight of a comptabile tackifier and 0 to 3% by weight of an antioxidant;
- characterized in that the resulting cigarette filter will open when exposed to water.
Dependencies are inferred from the claim text.