Abstract: There is provided a novel adhesive-backed tile panel protected by a release sheet. The prefabricated tile panel comprises a substrate sheet composed of a core fabric and a heat-softening-adherent asphalt composition applied to the both surfaces of the fabric; an adhesive layer having convex and concave portions such as stripes of an adhesive not flowable but sticky at an ambient temperature; and tiles arranged regularly and secured to the asphalt composition layer of the substrate sheet. The convex portions and concave portions of the adhesive layer constitute the gaps through which air present between the tile panels and a substrate board can be purged upon installation of the tile panels.

Abstract: There are provided a novel sintered apatite body and a novel sintered apatite-mineral fiber material composite. The crystals of the sintered apatite have fine dense crystalline structures comprising needle-like fine crystals and are entangled together, whereby the mechanical properties of the sintered apatite body or composite are markedly enhanced. The sintered body and composite wherein the apatite is hydroxyapatite are useful for bioceramic uses. The sintered apatite body or composite is produced by baking an apatite material alone or in contact with a reinforcing mineral fiber material in the presence of water under pressure at a temperature lower than 1000.degree. C., and further at a temperature lower than the temperature causing deterioration of the fiber material in the case of the composite.

Abstract: A lightweight and highly dimensionally accurate molded resin concrete product essentially comprises an intermediate layer composed of resin concrete having a resin content of about 10 to 70%, and a thickness which is not greater than 20/1,000 of its maximum length, and a pair of reinforcing layers composed of a fiber reinforced plastic, and between which the resin concrete layer is sandwiched. The product having a very small wall thickness, and high hot water resistance is particularly useful as a bathtub, or the like. Disclosed also is a method of making such a molded resin concrete product.

Abstract: This invention is based on the discovery by the inventors that, if a preliminary hydration hardening process and a full-scale hydration hardening process are provided after the molding process, and a process for burning a hardened body of cement at a high temperature is provided between the preliminary and full-scale hardening processes, it is possible to obtain a molded product of cement having a higher mechanical strength than any such product according to any known method including no such burning process.

Abstract: Quadruple-layer reinforced plastic products having decorative surface designs resembling marble, onyx or the like. Each product comprises four layers: (a) a gel coat layer of clear thermosetting resin, (b) a printed fabric, woven or nonwoven, made of glass fiber or polyester fiber and impregnated with a clear thermosetting resin, (c) a background layer comprised of a thermosetting resin in which an inorganic pigment has been dispersed and (d) a backup layer of FRP.

Abstract: A baking method and a kiln to bake many tiles rapidly and continuously which comprises providing endless chains, set fire-proof L-shaped supporting parts that tiles are inserted into, which are provided with an inserting apparatus that puts tiles to be baked intermittently and nearly horizontally at the front end and a rotating loop belt, to receive baked tiles, covered by a wall for keeping them hot at the rear end, and, rotating said chains in and beside the kiln and passing tiles to be baked with holding them in a standing position through the kiln.