METHOD FOR PAVING ROAD CHIP FOR IMPROVE USING URETHAN

• Main Authors: LEE, WOO HEE, LEE, YONG GU
• Format: Patent
• Language: English
• Published: 14.08.2007
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; MAKING GRANULES OR PREFORMS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A method for manufacturing elastic paving chips by using waste urethane as main material is provided to reduce the use amount of ground calcium carbonate and precipitated calcium carbonate and to prevent damage of forests and environmental disruption by using waste ABS(Acrylonitrile Butadiene Styrene) and waste pebax. In a method for manufacturing elastic paving chips by using waste urethane as main material, recyclable raw materials of waste polyurethane, waste ABS, and waste pebax are divided according to the color and hardness and foreign materials are removed. The waste polyurethane with the moisture content of 3~6wt.% is crushed in the size of 60~120mm(±10mm) enough to pour the waste polyurethane into an extruder. The waste ABS and waste pebax are crushed in the size of 40~50mm(±10mm) smaller than the waste polyurethane. The total amount of a pigment, a decolorizing agent, a softener, ground calcium carbonate, precipitated calcium carbonate, waste ABS, and waste pebax is restricted at 39wt.% of the total weight percent of the waste polyurethane. And then, a regenerated color waste polyurethane sheet is produced by mixing, heating, melting, extruding, stamping, and cooling all materials. The elastic paving chips are produced by crushing the regenerated color waste polyurethane sheet in the size of 3~5mm.