Provided is a method of producing a structure for producing a casting, including: a process (I) of obtaining a slurry composition containing an organic fiber, an inorganic fiber, a thermosetting resin, and water; a process (II) of obtaining a fiber laminate by subjecting the slurry composition to papermaking; and a process (III) of dehydrating the fiber laminate and thereafter drying the resultant, in which the process (I) includes a process (I-1) of beating a mixture containing the organic fiber and water, a process (I-2) of mixing the mixture obtained in the process (I-1) and water, and a process (I-3) of mixing the mixture obtained in the process (I-2) and the inorganic fiber, the thermosetting resin is mixed in at least any of the process (I-1), the process (I-2), and the process (I-3), and an average fiber length of the inorganic fiber in the structure for producing a casting is 1 mm or longer and 5 mm or shorter.

Provided is a method of producing a structure for producing a casting, including: a process (I) of obtaining a slurry composition containing an organic fiber, an inorganic fiber, a thermosetting resin, and water; a process (II) of obtaining a fiber laminate by subjecting the slurry composition to papermaking; and a process (III) of dehydrating the fiber laminate and thereafter drying the resultant, in which the process (I) includes a process (I-1) of beating a mixture containing the organic fiber and water, a process (I-2) of mixing the mixture obtained in the process (I-1) and water, and a process (I-3) of mixing the mixture obtained in the process (I-2) and the inorganic fiber, the thermosetting resin is mixed in at least any of the process (I-1), the process (I-2), and the process (I-3), and an average fiber length of the inorganic fiber in the structure for producing a casting is 1 mm or longer and 5 mm or shorter.

Paper with a grammage of 10-100 g/m.sup.2 including at least 20 wt. % of microfilaments and at least 20 wt. % of a non-resinous binder, the microfilaments having an average filament length in the range of 2-25 mm and titer less than 1.3 dtex, the non-resinous binder comprising at least one of fibrid or pulp. The paper shows high strength and other attractive properties.

Paper with a grammage of 10-100 g/m.sup.2 including at least 20 wt. % of microfilaments and at least 20 wt. % of a non-resinous binder, the microfilaments having an average filament length in the range of 2-25 mm and titer less than 1.3 dtex, the non-resinous binder comprising at least one of fibrid or pulp. The paper shows high strength and other attractive properties.

In a method for making a flexible material, a sheet of graphene oxide-composite paper is subjected to an environment having a relative humidity above a predetermined threshold for a predetermined amount of time. At least one expansion cut is cut in the sheet of graphene oxide-composite paper. A flexible conductive material includes a sheet of graphene oxide-composite paper defining at least one cut passing therethrough and formed it a kirigami structure. A region of the sheet of graphene oxide-composite paper includes reduced graphene oxide.

The thermal conductivity of the electrical paper insulation could be increased if the paper material is either enriched or fully substituted by a material with higher thermal conductivity. Diamond as enrichment material will be the right choice because besides the high thermal conductivity, it also acts as an excellent electrical insulator and has good mechanical properties. The thermal conductivity of the diamond is k.sub.diamond=2200 [W/mK], that is even more than 7000 times higher than the paper material. Diamond enriched insulation papers have not existed before this invention. In the proposed structure the diamond particles are held in place also by the fibrous substance of the paper itself, without the need of a holding matrix material by default, as shown in FIG. 1. The diamond particles mixed in the paper can also penetrate the paper across creating a thermal bridge between the insulated parts while maintaining strong electrical insulation.

A wrapper according to an aspect includes a pulp layer and metal particles uniformly distributed inside the pulp layer, wherein the metal particles contain a metal flake paste.

Paper with a grammage of 10-100 g/m.sup.2 including at least 20 wt. % of microfilaments and at least 20 wt. % of a non-resinous binder, the microfilaments having an average filament length in the range of 2-25 mm and titer less than 1.3 dtex, the non-resinous binder comprising at least one of fibrid or pulp. The paper shows high strength and other attractive properties.

Paper with a grammage of 10-100 g/m.sup.2 including at least 20 wt. % of microfilaments and at least 20 wt. % of a non-resinous binder, the microfilaments having an average filament length in the range of 2-25 mm and titer less than 1.3 dtex, the non-resinous binder comprising at least one of fibrid or pulp. The paper shows high strength and other attractive properties.

There is provided a method of manufacturing a graphene/graphene oxide layer comprising the steps of: providing a suspension of graphene/graphene oxide in a suspension liquid, applying the suspension on a support, heating the suspension and the support to evaporate liquid to form a layer of graphene/graphene oxide on the support, subjecting the graphene/graphene oxide layer and the support to pressure, and subjecting the graphene/graphene oxide layer to annealing process.