The invention concerns a wrapper paper which is suitable for use on aerosol-generating articles and which comprises pulp fibers and a char-former, wherein the pulp fibers make up at least 70% and at most 95% of the mass of the wrapper paper and the char-former is contained in a concentration of at least 5% and at most 20% with respect to the mass of the wrapper paper and is present in a concentration in the wrapper paper such that the quotient r=R.sub.T/R.sub.o of the tensile strength R.sub.o, measured in accordance with ISO 1924-2:2008 under the conditions of ISO 187:1990, and of the tensile strength R.sub.T, measured in accordance with ISO 1924-2:2008 under the conditions of ISO 187:1990 after the wrapper paper has been exposed to a temperature of 230° C. for one minute, is at least 0.20 and at most 0.90.

Disclosed are a paper-based electromagnetic shielding composite with flame retardant properties and its preparation method and application, belonging to the technical field of electromagnetic shielding. In the present disclosure, PI fibers are modified by polydopamine and grafted with carbon nanotubes, polyimide fiber paper is prepared by a wet papermaking technology, an in-situ synthesis method is used to enable conductive MOFs and polymer PPy to grow on the fiber paper, and finally polyimide resin is sprayed onto the paper to prepare the paper-based electromagnetic shielding composite with flame retardant properties. The method is simple in process without complex synthesis equipment, and solves the problems that polyimide fiber paper is poor in paper forming property and paper mechanical property, and carbon nanotubes are easy to agglomerate in paper and limited in addition amount in the prior art. The paper-based composite has good mechanical property, heat resistance, flame retardancy and electromagnetic shielding performance.

Disclosed are a paper-based electromagnetic shielding composite with flame retardant properties and its preparation method and application, belonging to the technical field of electromagnetic shielding. In the present disclosure, PI fibers are modified by polydopamine and grafted with carbon nanotubes, polyimide fiber paper is prepared by a wet papermaking technology, an in-situ synthesis method is used to enable conductive MOFs and polymer PPy to grow on the fiber paper, and finally polyimide resin is sprayed onto the paper to prepare the paper-based electromagnetic shielding composite with flame retardant properties. The method is simple in process without complex synthesis equipment, and solves the problems that polyimide fiber paper is poor in paper forming property and paper mechanical property, and carbon nanotubes are easy to agglomerate in paper and limited in addition amount in the prior art. The paper-based composite has good mechanical property, heat resistance, flame retardancy and electromagnetic shielding performance.

A composition in accordance with an aspect of the present invention includes: composite fibers composed of inorganic particles and fibers; and at least one of (i) different-type inorganic particles which are different in type from the inorganic particles, (ii) different-type fibers which are different in type from the fibers, and (iii) organic particles.

A paper suitable for use in a battery or battery pack as a flame barrier or thermal insulation, the paper comprising 60 to 95 weight percent aerogel powder and 5 to 40 weight aramid polymer fibrils; the paper having a thickness of 50 to 4000 micrometers.

A paper suitable for use in a battery or battery pack as a flame barrier or thermal insulation, the paper comprising 60 to 95 weight percent aerogel powder and 5 to 40 weight aramid polymer fibrils; the paper having a thickness of 50 to 4000 micrometers.

An object of the present invention is to provide, in particular, flame-resistant paper for a radio wave absorber member, the flame-resistant paper being unlikely to break during the production process and having favorable producibility in addition to being suitable for a radio wave absorber member and having high flame resistance. The flame-resistant paper for a radio wave absorber member according to the present invention contains pulp, aluminum hydroxide, guanidine phosphate, a binder, and a conductive substance, in which the content of the pulp is 5 to 20 mass%, the content of the aluminum hydroxide is 40 to 70 mass%, the content of the guanidine phosphate is 10 to 20 mass%, the content of the binder is 5 to 10 mass%, and the content of the conductive substance is 0.1 to 12 mass%.

An object of the present invention is to provide, in particular, flame-resistant paper for a radio wave absorber member, the flame-resistant paper being unlikely to break during the production process and having favorable producibility in addition to being suitable for a radio wave absorber member and having high flame resistance. The flame-resistant paper for a radio wave absorber member according to the present invention contains pulp, aluminum hydroxide, guanidine phosphate, a binder, and a conductive substance, in which the content of the pulp is 5 to 20 mass%, the content of the aluminum hydroxide is 40 to 70 mass%, the content of the guanidine phosphate is 10 to 20 mass%, the content of the binder is 5 to 10 mass%, and the content of the conductive substance is 0.1 to 12 mass%.

The present invention relates to paper or paperboard comprising cellulose fibers, said paper or paperboard comprising at least one coating layer formed by extrusion coating of a PP (polypropylene) resin, characterized in that the PP resin comprises at least 50% by weight of a branched PP copolymer having a density in the range of 890-910 kg/m.sup.3 (as determined according to ISO 1183), a melting temperature in the range of 155-170° C. (as determined according to ISO 11357-3), and a melt flow rate (230° C./2.16 kg) in the range of 10-15 g/10 min (as determined according to ISO 1133), and wherein the PP resin is applied to the paper or paperboard at a grammage of less than 30 g/m.sup.2.

The present invention relates to paper or paperboard comprising cellulose fibers, said paper or paperboard comprising at least one coating layer formed by extrusion coating of a PP (polypropylene) resin, characterized in that the PP resin comprises at least 50% by weight of a branched PP copolymer having a density in the range of 890-910 kg/m.sup.3 (as determined according to ISO 1183), a melting temperature in the range of 155-170° C. (as determined according to ISO 11357-3), and a melt flow rate (230° C./2.16 kg) in the range of 10-15 g/10 min (as determined according to ISO 1133), and wherein the PP resin is applied to the paper or paperboard at a grammage of less than 30 g/m.sup.2.