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CONSTRUCTION METHOD OF ELASTIC LAYER PACKING MATERIAL BY PREPARATION PROCESS OF TWO-PACK POLYURETHANE CHIP USING RUBBER MATERIAL INSTEAD OF ASPHALT OR CONCRETE
CONSTRUCTION METHOD OF ELASTIC LAYER PACKING MATERIAL BY PREPARATION PROCESS OF TWO-PACK POLYURETHANE CHIP USING RUBBER MATERIAL INSTEAD OF ASPHALT OR CONCRETE
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机译:橡胶材料代替沥青或混凝土制备两层聚氨酯芯片的弹性层填料的构建方法
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摘要
PURPOSE: Provided is a method for constructing an elastic layer packing material by the preparation process of a two-pack type polyurethane chip to obtain a bottom material having excellent durability and elasticity. CONSTITUTION: The method comprises the steps of mixing 30-40 wt% of a triol with a molecular weight of 3,000-5,000, 25-35 wt% of a diol with a molecular weight of 2,000-3,000, and 20-30 wt% of an isocyanate at a thermostat reactor of 60-80 deg.C to react them for 3-5 hours to prepare a first type pack; mixing 6-9 wt% of a triol with a molecular weight of 3,000-5,000, 30-40 wt% of a diol with a molecular weight of 2,000-3,000, a filer, a plasticizer, a colorant and other additives and dispersing the mixture with a velocity of 2,000 rpm for 3-5 hours to prepare a second type pack; weighing the first and second type packs and mixing them; injecting the mixture into a mold to prepare a sheet with a thickness of 20-30 nm; firstly curing the sheet at a room temperature, separating the cured one from the mold, and secondly curing it at 70 deg.C for 4-6 hours with 55-66 shore A; pulverizing the cured sheet to prepare a polyurethane elastic chip; mixing the chip with a binder and an additive and coating it onto a packing surface with a uniform thickness; stamping the coating with a thermostat roller for 5-6 times; and curing it for 32 hours in spring or fall, 24 hours in summer and 48 hours in winter.
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