초록 ▼

A method of reducing the burn rate of a smoking article is provided. Specifically, the burn rate is reduced by incorporating into a paper wrapper of the smoking article a filler (e.g., precipitated calcium carbonate) having a median particle size greater than about 2.5 microns. For instance, such pa

A method of reducing the burn rate of a smoking article is provided. Specifically, the burn rate is reduced by incorporating into a paper wrapper of the smoking article a filler (e.g., precipitated calcium carbonate) having a median particle size greater than about 2.5 microns. For instance, such paper wrappers formed according to the present invention typically have a Diffusion Conductance Index (DCI) of less than about 15 cm-1and a Static Burn Rate (SBR) of less than about 5 millimeters per minute.

대표청구항 ▼

A method of reducing the burn rate of a smoking article is provided. Specifically, the burn rate is reduced by incorporating into a paper wrapper of the smoking article a filler (e.g., precipitated calcium carbonate) having a median particle size greater than about 2.5 microns. For instance, such pa

A method of reducing the burn rate of a smoking article is provided. Specifically, the burn rate is reduced by incorporating into a paper wrapper of the smoking article a filler (e.g., precipitated calcium carbonate) having a median particle size greater than about 2.5 microns. For instance, such paper wrappers formed according to the present invention typically have a Diffusion Conductance Index (DCI) of less than about 15 cm-1and a Static Burn Rate (SBR) of less than about 5 millimeters per minute. claim 13 wherein the adhesive further comprises a second ethylene vinyl acetate copolymer, wherein the second ethylene vinyl acetate copolymer comprises 28 weight percent vinyl acetate with a melt index of 6 to 40 dg/min. 15. A cigarette filter according to claim 13 wherein the adhesive further comprises a polymeric additive selected from the group consisting of ethylene methyl acrylate polymers containing 10 to 28 weight percent by weight methyl acrylate, ethylene acrylic acid copolymers having an acid number of 25 to 150, methyl (meth)acrylate copolymers, polyethylene, polypropylene, poly(butene-1-co-ethylene) polymers and low molecular weight and/or low melt index ethylene n-butyl acrylate copolymers, and combinations thereof. 16. A cigarette filter according to claim 1 wherein the adhesive comprises 30 to 60 weight percent polyethylene polymer with melt index of 5000 to 2000 dg/min at 190° C., a density of 0.900 to 0.930, and a softening point less than 110° C. 17. A cigarette filter according to claim 1 wherein the adhesive comprises blends selected from the group consisting of blends of EnBA and EVA polymers; blends of polyethylene and EVA; blends of poly α-olefin and EVA; and combinations thereof. 18. A cigarette filter according to claim 1 wherein the hot melt adhesive comprises: a) 31 parts paraffin wax with a softening point of 150° F.; b) 21 parts ethylene vinyl acetate copolymer with a melt index of 400 and a vinyl acetate content of 28%; c) 11 parts or ethylene vinyl acetate copolymer with a melt index of 43 and a vinyl acetate content of 28%; d) 37 parts of alpha-methyl styrene tackifying resins; and e) 0.5 parts of an antioxidant stabilizer. 19. A cigarette filter according to claim 1 wherein the hot melt adhesive comprises: a) 50 parts polyethylene; b) 40 parts of an aliphatic-aromatic hydrocarbon tackifying resin; c) 10 parts of a microcrystalline wax with a softening point of 195° F.; and d) 0.2 parts of an antioxidant stabilizer. 20. The process for preparing a cigarette filter comprising applying a low application temperature hot melt adhesive to porous and/or nonporous plugwrap paper. 21. The process according to claim 20 wherein the adhesive comprises at least one ethylene copolymer. 22. The process according to claim 20 wherein the adhesive comprises ethylene n-butyl acrylate copolymer comprising 10 to 40 weight percent n-butyl acrylate with a melt index of at least 40 dg/min, and optionally a second ethylene n-butyl acrylate copolymer, wherein the second ethylene n-butyl acrylate copolymer comprises 25 to 35 weight percent n-butyl acrylate. 23. The process according to claim 20 wherein the adhesive comprises: a) 10 to 40 weight percent ethylene n-butyl acrylate comprising 10 to 40 weight percent n-butyl acrylate with a melt index of at least 400 dg/min; b) 10 to 60 weight percent tackifier; c) 0 to 35 weight percent wax; and d) optionally 1 to 25 weight percent of a second ethylene n-butyl acrylate, wherein the second ethylene n-butyl acrylate comprises 33 to 35 weight percent n-butyl acrylate with a melt index of 40 dg/min. 24. The process according to claim 20 wherein the adhesive comprises: a) 15 to 45% ethylene n-butyl acrylate copolymers having a melt index of at least 200; b) 25 to 55% a-methyl styrene tackifying resins; and c) 15 to 40% of a low melting point paraffin wax. 25. The process according to claim 20 wherein the adhesive comprises: a) from 20 to 40 weight percent of an ethylene/α-olefin copolymer; b) from 20 to 40 weight percent tackifier; and c) from 10 to 40 weight percent wax. 26. The process according to claim 25 wherein the ethylene/α-olefin copolymer has a composition distribution breath index greater than 50% and Mw/Mn less than 6. 27. The process according to claim 25 wherein the ethylene/α-olefin copolymer has a melt index of 40 to 1000 dg/min, a melt point of 71 to 90° C., a density of 0.850 to 0.92, a composition distribution br