Shanghai Daoqin Plastics Co., Ltd.

         polyurethane ester product in recent years 越 越受 to 人们 青睐, ratio active in use 床垫, carpet, and currently in automotive industry in by application. polyurethane ester (PU) full is polyurethane acid ester, belongs to polymer/macromolecule combined material, can separation is polyester and polyether types type type, can made formed polyurethane ester plastics (以 foam plastics is 主), polyurethane ester fiber (氨纶)以 and polyurethane ester and elastomer, 并总体 separation is hot solid and thermoplastic property large type.

         large separation polyurethane ester material belongs to hot solid property, soft 质, hard and semi hard polyurethane ester foam plastics, also has used for automotive parts and other manufacturing reaction injection molding (RIM) polyurethane ester elastomer. this category of polyurethane ester material and thermoplastic polyurethane (TPU) material full different, very difficult through melt pelletizing mixed new material in use, currently recycling rear more through 焚烧, and other methods 进行处理, for ring effect/influence relatively large. in recent years through 科研人员 探索, polyurethane ester recycling methods 也丰富起, small simple is introduction lower about/regarding polyurethane ester recycling methods:

         polyurethane ester material recycling methods

         material recycling

        ·黏结 molding

         through powder machine, will polyurethane ester foam powder formed cm sheet/slice, 并喷洒 reaction type polyurethane ester type combined agent, mixed combined uniform rear add hot hot pressure molding. combined agent main/primary polyurethane ester foam combined material or more more 亚甲基 more acid ester (PAPI) is 基础 端NCO基预 poly 体. in using/adopting 以PAPI is 主 黏 combined agent molding 时, also can 通入蒸汽 mixed combined.

         this type of methods made formed recycled polyurethane ester material usually used for carpet 背衬, 运动垫, 隔音材 material and other. can in conditions lower production 出适宜 automotive 底部 垫 sheet/plate and machine housing/shell and other hard parts.

        · hot pressure molding

         hot solid property polyurethane ester soft and RIM polyurethane ester products in 100~220°C temperature degree scope/range tool has hot soft can property can, 无需黏 combined agent can pressure made adhesion molding. is make again production product more add uniform, is will waste material powder rear again add hot add pressure molding.

        · as is filler

         will polyurethane ester soft low temperature powder or abrasion formed fine micro pellets, will has this category of pellets dispersion liquid and more alcohol combined, more used for manufacturing polyurethane ester foam and other products.

         chemical recycling

        · binary alcohol understanding method

         from waste polyurethane ester in recycling more alcohol is binary alcohol understanding method Common application areas. through small separation binary alcohol and catalytic agent function, will polyurethane ester in 200℃ left right conditions lower alcohol understanding reaction to more alcohol, will this recycled more alcohol and new more alcohol mixed combined, can use again made as polyurethane ester material.

        · amine understanding method

         polyurethane ester foam in amine, amine combined material in very easy separation understanding, separation understanding mechanism and ester reaction versus 似. from polyurethane ester or polyurethane ester separation understanding formed low molecular weight 含羟基 and 氨基 化 combined material. reaction features is reaction active property large, amine understanding in 150℃ below/following relatively low temperature degree easy 进行.

        · other chemical method

        包括 hydrolysis method, alkali understanding method, alcohol understanding amine understanding combined method, alcohol method, separation understanding method, hot understanding method and other.

         hot can recycling

        ·燃烧发 electrical

         polyurethane ester material 燃烧会 generate a large amount of hot can, can used for waste 焚烧发 electrical. but also outer expert research, polyurethane ester hot can can more more 节省矿 material material consumption, through use 专业 焚烧 plant/unit, separation 燃烧并 combined 理处置 waste 弃, can make polyurethane ester in 燃烧处理方面 more add environmental protection.

        · hot understanding 化油

         in high temperature, high pressure, oxygen and other conditions lower, soft polyurethane ester foam plastics and elastomer and other can hot separation understanding, to hot understanding type material and gas 体. its in hot understanding can pure formed raw materials again used for production, 但实际 upper more more as is use, combined polyurethane ester and other plastics mixed combined waste material recycling. is technology water 平尚未 can very good polyurethane ester and other nitrogen polymer for catalytic agent poor issues, also by 广泛推行.

         recycling new breakthrough

         most has 消息称, 由Steven Zimmerman教授领导 伊利诺伊 large 学团队 in polyurethane ester waste material recycling 方面取 new breakthrough, through chemical recycling methods using/adopting more easy degradation and water solvent property chemical mono shrink aldehyde, and chlorine acid and chlorine 甲烷形 formed solvent understanding mixed combined material, in room temperature lower as used for polyurethane ester waste material, make its degradation generate can heavy new used as raw materials product. as is concept 证明, research can will automotive and packaging in use elastomer is agent.

        该科研 formed already in USA chemical full 国会议 and expo upper table/sheet report, is this type of recycling methods 不足之处 is reaction use catalytic raw materials cost high, property large, 而该科研团队也 positive in 尝试寻找 more add temperature and, more low solvent agent achieve same degradation process.