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The method of recovering the polyester chemical recycling method is currently great concern . Chemical recycling method prospects for industrialization prominent is ethylene glycol alcohol solution , the current recycling waste PET studies generally focus on PET bottle recycling , but little research on polyester . As molecular weight and intrinsic viscosity varies greatly , PET bottle glycol alcoholysis process is not the best of polyester glycol alcohol solution process . This study is an alcohol solution of ethylene glycol polyester silk waste processing conditions , analysis of the reaction temperature, reaction time, catalyst content on the impact of alcohol solution process , using DSC, IR and HPLC methods , such as testing for alcohol decomposition products were characterized and tested and analysis of polyester filament and glycolysis products hydroxyl value , acid value . Suitable alcoholysis process: the temperature at about 196 ℃ , Zn (AC) 2.2 H2O content of 0.5% , the reaction time was 2h, alcoholysis rate reached 98.06% . Analysis showed that: the major product alcohol solution terephthalate (BHET) monomer , after purification by crystallization purity of up to 96 % alcohol solution also includes a small amount of product dimers , trimers . After purification by a simple alcoholysis product BHlET as matrix, adding modified monomer diethylene glycol (DEG) and Q phthalate -5 - sodium (SIPA), by esterification , transesterification - Polymerization Preparation of water-soluble polyester slurry , using infrared light latent its structure was characterized to determine the synthetic polyester slurry into three monomers. Determination of the viscosity of the polyester pulp slurry , thermal stability , measured by the slurry roving adhesion. Preparation of mass fraction of 10 /90 polyester pulp / acid hydrolysis of starch mixed slurry serosal serosal measured breaking strength, breaking elongation , abrasion resistance and moisture absorption , starch slurry with an acid solution for serosa comparison . The results showed that: the prepared pulp slurry having a low viscosity polyester and the advantage of excellent thermal stability ; polyester pulp / acid hydrolysis of the starch slurry is mixed slurry of good miscibility , tensile properties serosal mixed slurry , abrasion resistance, buckling better performance .
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