A sheet comprises a nonwoven filamentary substrate and an inorganic refractory layer in contact with at least one surface of the substrate wherein (i) the substrate comprises from 40 to 80 weight percent of uniformly distributed mica and from 20 to 60 weight percent aramid material, the aramid material being in the form of aramid floc or pulp, a combination thereof and polymeric binder and (ii) the refractory layer comprises from 85 to 99 weight percent of platelets and from 1 to 15 weight percent of an adhesion promoter. The sheet is an electrically insulating flame and thermal barrier.

A method for improving the fire resistance of a cellulose material comprises mixing boric acid with methanol to form a boric acid ester, combining the borate ester with magnesium sulfate to form a low viscosity magnesium borate sulfate solution, treating the cellulose material with the magnesium borate sulfate solution, and heating the treated cellulose material to evaporate remaining alcohol and solvent to form a crystals of a complex mixture containing combinations of magnesium sulfate, boric acid, magnesium borate, magnesium borate sulfate and their hydrates.

A method for improving the fire resistance of a cellulose material comprises mixing boric acid with methanol to form a boric acid ester, combining the borate ester with magnesium sulfate to form a low viscosity magnesium borate sulfate solution, treating the cellulose material with the magnesium borate sulfate solution, and heating the treated cellulose material to evaporate remaining alcohol and solvent to form a crystals of a complex mixture containing combinations of magnesium sulfate, boric acid, magnesium borate, magnesium borate sulfate and their hydrates.

The present disclosure relates to transparent flame-retardant coating compositions and labels including layers comprising the same. The coating composition comprises a high-hydroxyl value polymer, a crosslinker, and a flame-retardant additive comprising a phosphinate compound. The coating composition may be coated on a substrate such as a label. The coating composition forms a layer that advantageously has flame-retardant properties and is optically clear.

The present invention relates to a cigarette butt wrapping paper which comprises: a body having a planar shape approximately similar to the shape of a cigarette pack; a flame-retardant coated surface which is formed on the inside of the body, has a transverse length approximately similar to the circumferential length of a cigarette butt, and is coated with a material having a heat resisting function; an adhesive applied surface onto which an adhesive has been applied, wherein the adhesive applied surface is an area surrounding the outer circumferential surface of the flame-retardant coated surface; and opening forming parts which are formed in such a manner that the opposite side ends of the lower end of the body are inwardly recessed and form an entrance, through which the cigarette butt can be input, when the opposite side ends are matched and boned to each other.

The present invention relates to a cigarette butt wrapping paper which comprises: a body having a planar shape approximately similar to the shape of a cigarette pack; a flame-retardant coated surface which is formed on the inside of the body, has a transverse length approximately similar to the circumferential length of a cigarette butt, and is coated with a material having a heat resisting function; an adhesive applied surface onto which an adhesive has been applied, wherein the adhesive applied surface is an area surrounding the outer circumferential surface of the flame-retardant coated surface; and opening forming parts which are formed in such a manner that the opposite side ends of the lower end of the body are inwardly recessed and form an entrance, through which the cigarette butt can be input, when the opposite side ends are matched and boned to each other.

A paper well suited for use as a wrapper in heat but not burn sticks is disclosed. The paper includes a base web made from cellulosic fibers combined with a flame retardant filler and/or can include a coating formed from a reduced ignition composition.

A paper well suited for use as a wrapper in heat but not burn sticks is disclosed. The paper includes a base web made from cellulosic fibers combined with a flame retardant filler and/or can include a coating formed from a reduced ignition composition.

A flame-blocking nonwoven fabric has excellent processability and high flame-blocking properties. The flame-blocking nonwoven fabric has a density of 200 kg/m.sup.3 or more and includes non-melting fibers A whose high-temperature shrinkage rate is 3% or less and whose Young's modulus multiplied by the cross-sectional area of the fibers is 2.0 N or less, and thermoplastic fibers B whose LOI value is 25 or more as determined according to JIS K 7201-2 (2007).

A flame-blocking nonwoven fabric has excellent processability and high flame-blocking properties. The flame-blocking nonwoven fabric has a density of 200 kg/m.sup.3 or more and includes non-melting fibers A whose high-temperature shrinkage rate is 3% or less and whose Young's modulus multiplied by the cross-sectional area of the fibers is 2.0 N or less, and thermoplastic fibers B whose LOI value is 25 or more as determined according to JIS K 7201-2 (2007).