TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The tabular inorganic substance is inorganic lamellar compound (preferably selected from smectite, talc, kaolinite or mica). The inorganic lamellar compound is layered silicate hydrophobized by cation exchange method using cationic surfactant. The amount of the tabular inorganic substance is 10-70 mass.%. The tabular inorganic substance is oriented in a planar direction.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The dicarboxylic acid in (I)-(III) is dicarboxylic acid having alicyclic structure (preferably 1,4-cyclohexane dicarboxylic acid).    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The three-dimensionally crosslinkable resin composition is a resin composition not containing an aromatic ring. The three-dimensionally crosslinkable resin composition is an allyl ester resin composition and/or crosslinkable acrylic resin composition. The allyl ester resin composition is a composition containing an allyl ester compound having an ester structure formed from polyhydric alcohol and dicarboxylic acid, with allyl group and/or methallyl group as terminal group. The allyl ester resin composition further contains at least one compound of formula R1-O-C(O)-A1-C(O)-O-R2 (I); and reactive monomers. The allyl ester compound has a group of formula R3-O-C(O)-A2-C(O)- as terminal group and has a structure of formula -X-O-C(O)-A3-C(O)-O- as a constituent unit.R1-R3=allyl or methallyl;A1-A3=organic residue having an alicyclic structure, aromatic ring structure or aliphatic chain structure derived from dicarboxylic acid;andX=organic residue derived from polyhydric alcohol.Provided that through ester bond, X can further have (II) as terminal group and a branched structure including (III) as constituent unit. Preferred Method: The method (M1) involves the step of mixing a solution containing resin component of the three-dimensionally cross-linkable resin composition dissolved in solvent with a dispersion solution containing the tabular inorganic substance swollen or cleaved in solvent; a step of spreading a mixture of resin component of a three-dimensionally cross-linkable resin composition, a tabular inorganic substance and solvents on a surface while applying a force parallel to the coated surface (preferably by roll-coating method or doctor-blade method); and a step of spreading a mixture of resin component of a three-dimensionally cross-linkable resin composition, tabular inorganic substance and vaporizable solvents on a substrate to be coated and then allowing the tabular inorganic substance to be oriented in a planar direction by letting the solvents vaporize. The mixture is spread on a substrate to be coated and dried to obtain a resin film containing the tabular inorganic substance dispersed in it and then the film is cured to be a film or a sheet. EXAMPLE - In a flask was placed diallyl terephthalate (1625 g), propylene glycol (327 g) and dibutyl tin oxide (0.813 g). The mixture was heated to 180degrees C under nitrogen stream to react, while distilling off generated allyl alcohol. When the amount of distilled alcohol reached about 350 g, the inside of the reaction system was depressurized to 6.6 kPa for 4 hours to accelerate the distillation rate of alcohol and when almost no distilled liquid coming out was observed, the inside of the reaction system was depressurized to 0.5 kPa and reaction was continued for another 1 hour. Then the reaction product was cooled to form oligomer (O1). In a beaker, toluene (90 g) was placed and oleophilic smectite (10 g), which had been subjected to cation-exchange treatment by trioctyl methyl ammonium salt, was placed in the beaker little by little while stirring with a stirrer. After stirring with a stirrer for 2 days at room temperature, a dispersion liquid of smectite was obtained. To the dispersion liquid of smectite, oligomer (O1) (10 g) and Perhexa TMH (RTM: radical polymerization initiator) (0.30 g) was added and stirred completely, to thus obtain a composition. The obtained composition was applied on a polyethylene terephthalate film by using a bar-coater. Then, the coated film was dried at 50degrees C for 1 hour by a hot air drier to evaporate solvent toluene. Further, the coated film was covered with another polyethylene terephthalate film and the films were sandwiched between 2 glass plates. Curing was conducted at 80degrees C for 1 hour, 100degrees C for 1 hour and 120degrees C for 1 hour. The polyethylene terephthalate films were removed to thus prepare a sample film (test). A comparative was similarly prepared by adding Perhexa TMH (0.30 g) to oligomer (O1) (10 g), without oleophilic smectite. Both test/comparative were evaluated for coefficient of thermal expansion and glass transition temperature. Results showed that the coefficient of thermal expansion of test/comparative was 18/112 parts per million (ppm)/degrees C, and a glass transition temperature of greater than or equal to 300/70degrees C. Also, when test was rolled on a circular cylinder, no crack, whitening was observed and was extremely flexible.