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Artificial stone is resin binder, together with the natural marble or calcite, dolomite, silica sand, glass and other inorganic mineral powder and appropriate amount of flame retardants, stabilizers, pigments, etc., by mixing the ingredients, casting, vacuum molding, grinding and polishing process, such as curing molding made of an artificial stone.
Artificial stone solid surfaces smooth surface appearance, color beautiful, with a certain degree of transparency; have sufficient strength, stiffness, hardness, impact resistance, anti-scratch and good; have resistant climate aging, anti-deformation and the sudden cold and hot at first; from one end to a solid surface without pores, not filth, easy clean-up, lasting often new; Stitching seamless, smooth surface; heat resistance, cold tolerance, corrosion resistance; can be cut and heat bending, shaping a variety of different. Artificial stone retains the elegance of quartz stone, elegant temperament, to overcome the quartz stone in the pores often, cracks, color, radioactive and other shortcomings, is rapidly becoming an international epidemic of high-grade environmentally-friendly decorative materials.
Solid surfaces by the matrix material can be divided into acrylic (PMMA) and unsaturated polyester (UPR) two broad categories, generally produced by domestic enterprises category for UPR. UPR-type solid surfaces by the unsaturated polyester resins and aluminum hydroxide or calcium carbonate powder composite form, the production process for flat-panel molding casting. Its production process control points: ① resin with filler and mixed with the effect; ② control gel time; ③ vacuum bubble effect Pai; ④ curing temperature and time control; ⑤ after treatment technology.
In the stone forming process, the most important is the basic process is the molding resin curing, resin from the liquid into a solid-state process, this process can not be passed under pressure and room temperature, from the chemistry point of view, from the line structure into a body structure of the process. After resin curing reaction, the liquid resin into a solid body that is the structure of the insoluble non-cross-linked copolymer melt, and a certain strength, hardness and toughness.
The production of the main raw material for polyester Stone unsaturated polyester resin is unsaturated dicarboxylic acids or their saturated dicarboxylates with mixed acid and polyols by polycondensation with a ester bond and unsaturated double bonds of the line type polymer. Usually of polyester polycondensation is 190 ~ 220 ℃ until achieve the desired viscosity. Polycondensation of the polyester after adding a certain amount of hot vinyl monomer, pair viscous liquid, that is the main raw material for artificial stone - finish.