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AssigneeJsp Corporation
InventorsMasanori Mitsumoto, Hideki Kuwabara, Kazuhiko Omori, Satoru Shioya, Wataru Kikuchi
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The present invention relates to a decorative mold having an uneven pattern for forming a concrete surface with an uneven pattern by transfer. The present decorative mold is made of a molded product of polypropylene type foamed particles having a density of 0.02 to 0.06 g/cm.sup.3 and is formed with an uneven pattern on one surface for forming a pattern on a concrete surface by transfer, and in the surface having the uneven pattern for transfer, the total area, in terms of projected plane, of gap sections present in all the projected plane of the decorative mold accounts for less than 0.5% of all the area, in terms of projected plane, of the decorative mold. The maximum bending strength of the decorative mold determined by pressing from the undersurface opposite to the side having the uneven pattern is preferably 8.0 kgf/cm.sup.2 or more, and the average particle diameter of the polypropylene type resin foamed particles that are a raw material constituting the decorative mold is preferably 1 to 4 mm. The side walls are preferably spread out from the undersurface side of the decorative mold toward the side of the surface having the uneven pattern. Further the molded product of polypropylene type resin foamed particles that constitutes the decorative mold has preferably such a crystalline structure that the DSC curve obtained by subjecting the molded product to differential scanning calorimetry has a high-temperature peak the amount of heat of which is 13 to 30 J/g.
A decorative mold for forming an uneven pattern on a concrete surface by transfer, comprising a molded product of polypropylene resin foamed particles that has a density of 0.02 to 0.06 g/cm.sup.3 and possesses on one surface an uneven pattern for forming an uneven pattern on a concrete surface by transfer, wherein, in the surface having the uneven pattern for transfer, the total area, in terms of projected plane, of gap sections present in all the projected plane of the decorative mold accounts for less than 0.5% of all the area, in terms of projected plane, of the decorative mold, and wherein said polypropylene resin is selected from the group consisting of a propylene homopolymer or a copolymer of propylene with other copolymerizable monomer.
Dependencies are inferred from the claim text.