Disclosed herein is a process for making a marble appearing casting having superior depth characteristics by placing a low-density polymerizable resin into a mold to at least partially cover the bottom thereof placing a high-density polymerizable resin on top of the low-density resin to completely cover the low-density resin, allowing the low-density resin to float up through the high-density resin as both resins polymerize and solidify.

Disclosed herein is a process for making a marble appearing casting having superior depth characteristics by placing a low-density polymerizable resin into a mold to at least partially cover the bottom thereof placing a high-density polymerizable resin on top of the low-density resin to completely cover the low-density resin, allowing the low-density resin to float up through the high-density resin as both resins polymerize and solidify.

The present invention provides an artificial marble composition and an artificial marble using the same, the composition including (A) 100 parts by weight of an acrylic resin syrup, (B) 150 parts by weight to 250 parts by weight of an aluminum-based inorganic filler, (C) 8 parts by weight to 100 parts by weight of a phosphorus-based flame retardant, and (D) 35 parts by weight to 100 parts by weight of a magnesium-based flame retardant.

The present invention relates to a composition for manufacturing artificial marble including a first preliminary composition and a second preliminary composition which include an acrylic-based monomer, an acrylic-based resin, a polymerization initiator, a crosslinking agent, a coloring agent, and a gelling agent and have a viscosity of 100,000 Ps to 5,000,000 Ps and/or a storage modulus of 100,000 Pa to 1,000,000 Pa. A viscosity of the second preliminary composition is higher than a viscosity of the first preliminary composition. Coloring agents of the first preliminary composition and the second preliminary composition have different colors. A weight ratio of the first preliminary composition to the second preliminary composition is in a range of 1:1 to 500:1. According to the present invention, artificial marble having a dashed pattern similar to that of natural marble is provided by increasing viscoelasticity to prepare semi-solid preliminary compositions for manufacturing artificial marble, having excellent workability and machinability, preparing a composition for manufacturing artificial marble by mixing two or more of the semi-solid preliminary compositions, and performing various molding and machining processes on the composition.

The present invention relates to a method and a system for producing slabs, tiles or sheets of artificial stone, with a wide vein effect, which comprise inorganic particles of different sizes and hardened binders, and which simulate the appearance that some types of natural stone have, as well as the slabs, tiles or sheets of artificial stone obtained by means of said method and system.

Disclosed is a composite white pigment having mixed together white pigments having different colorimeter values from each other by comprising substrates having various sizes and/or TiO2 having various thicknesses. The composite white pigment, according to the present invention, comprises: a first white pigment comprising a substrate and a white metal oxide layer formed on the substrate; and a second white pigment comprising a substrate and a white metal oxide layer formed on the substrate, and having a different colorimeter value from that of the first white pigment.

A composition for artificial marble, of the present invention comprises: a binder resin; an inorganic filler excluding zinc oxide; and zinc oxide, wherein the zinc oxide has a size ratio (B/A), in which peak A is a 370 nm to 390 nm region and peak B is a 450 nm to 600 nm region, of approximately 0.01 to 1 during photoluminescence measurement, and has a BET surface area of approximately 10 m.sup.2/g or less.

Systems and methods of thermoforming stone slabs are provided, such as by heating a stone slab while forming it to a mold. Curved stone slabs may be produced having low radii of curvature.

The present invention relates to an artificial marble including one or more stripe regions and a base region on a first surface of the artificial marble, in which the stripe regions extend into the artificial marble, in which the artificial marble includes a section where a surface of the section corresponding to the first surface of the artificial marble is the base region and an inside of the artificial marble in a vertical direction under the base region is the stripe region, and in which at least a part of the stripe region of the section is visible to a naked eye from the surface of the base region.

The present invention provides an apparatus for manufacturing artificial marble, which includes a granite soil storage unit configured to supply a granite soil by storing, drying, and heating it, a granite soil heating unit configured to heat the granite soil supplied from the granite soil storage unit, a resin storage unit configured to store a thermoplastic polyurethane (TPU) resin maintained in a solid phase at room temperature, a mixing-transporting unit configured to accommodate the TPU resin and the heated granite soil therein and then melting and mixing them to produce and simultaneously transport an artificial marble slurry, a material guide unit configured to guide the granite soil and the TPU resin into the mixing-transporting unit, a discharge unit configured to discharge the artificial marble slurry mixed in the mixing-transporting unit by a certain amount, a mold supply unit configured to continuously supply a mold for accommodating and molding the artificial marble slurry therein, a mold guide unit configured to guide the mold supplied from the mold supply unit downward of the discharge unit to accommodate the artificial marble slurry in the mold, a forming unit configured to form an artificial marble by applying vibration and pressure to the artificial marble slurry accommodated in the mold, an extraction unit configured to extract the mold accommodating the artificial marble, and a lamination unit configured to laminate and store the mold extracted by the extraction unit.