WATER SENSITIVE HOT MELT ADHESIVES FOR CIGARETTES

摘要

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, a water sensitive hot melt adhesive comprising 50 to 90 weight percent of a graft copolymer which copolymer comprises 40 to 85 weight percent of at least one vinyl monomer and 15 to 60 weight percent of at least one polyalkylene oxide polymer, 0 to 50 weight percent of a compatible tackifying resin, 5 to 40 weight percent of a polar wax, 0 to 3 weight percent antioxidant and 0 to 30 weight percent of another compatible water soluble or water sensitive thermoplastic polymer; characterized in that the resulting cigarette filter will open when exposed to moisture.