| 摘要 |
PURPOSE: A method of extracting glass fibers included in the car scrap is provided to reduce pollutants by burning and save materials in the way sound proofing materials are pressurized and recycled glass fiber from industrial waste such as scrape and aluminum are recollected. CONSTITUTION: A method of extracting glass fibers included in the car scrap comprises the following steps; a step to remove aluminum formed in the layer of a scrap by putting the scrap and sodium hydroxide solution in a bath for chemical reaction, a step to extract glass fibers by reacting the scrap without aluminum and a concentrated nitric acid solution in a bath for chemical reaction and dissolving the poly lactic acid of the layer of the glass fibers and separating a polyurethane layer, a step to finish making reusable glass fibers by washing and drying the extracted glass fibers. [Reference numerals] (AA) Scrap of sound proofing materials; (BB) Removing aluminum from the scrap(reacting with an aqueous caustic soda solution); (CC) Separating the glass fiber layer and the resin layer of the scrap and collecting glass fiber(reacting with a strong aqueous nitric acid solution); (DD) Washing and drying the collected glass fiber(naturally drying or artificially drying); (EE) Completing recycled glass fiber; (FF) Separating an aqueous sodium aluminate solution(using a Bayer process); (GG) Collecting and reusing the aqueous caustic soda solution; (HH) Collecting aluminum hydroxide
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