A kind of recycling method of waste polyester/polyurethane blended fabric
A blended fabric and polyurethane technology, applied in recycling technology, educts, plastic recycling, etc., can solve the problems of non-productive polyester/polyurethane separation, difficult separation of polyester polymerization intermediates, complicated operation process, etc., and the cost is achieved. Low, inhibition of thermal degradation, short process flow effect
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Embodiment 1
[0029] 1) the waste polyester / polyurethane blended fabric (wherein polyester is polyethylene terephthalate, its content is 70% (mass fraction), polyurethane is the content of polyester polyurethane is 30% (mass fraction) ) were crushed, cleaned and vacuum-dried to obtain polyester / polyurethane blended fabric fragments with a water content of 98ppm;
[0030] 2) the polyester / polyurethane blended fabric fragments and the styrene-maleic anhydride copolymer (wherein the maleic anhydride unit content is 10% (molar ratio)) powder (powder diameter is 0.3mm) accounting for 10% of its mass fraction, The antioxidant YIPHOS3010, which accounts for 0.25% of its mass fraction, is fully mixed and uniformly pre-melted and agglomerated in a polyester foam granulator at a temperature of 205°C. The time should be controlled within 2 minutes, and the modified polyester / polyurethane foam will be obtained after this process;
[0031] 3) The modified polyester / polyurethane foam is vacuum-dried to ...
Embodiment 2
[0035] 1) the waste polyester / polyurethane blended fabric (wherein polyester is polyethylene terephthalate, its content is 60% (mass fraction), polyurethane is the content of polyether type polyurethane is 40% (mass fraction) ) were crushed, cleaned and vacuum-dried to obtain polyester / polyurethane blended fabric fragments with a water content of 96 ppm;
[0036] 2) the polyester / polyurethane blended fabric fragments and the styrene-maleic anhydride copolymer (wherein the maleic anhydride unit content is 25% (molar ratio)) powder (the powder diameter is 0.05mm) accounting for its mass fraction of 25%, The antioxidant Irgafos168, which accounts for 0.4% of its mass fraction, is fully mixed and uniformly pre-melted and agglomerated in a polyester foam granulator at a temperature of 180°C. The agglomeration process is assisted by nitrogen protection, and the raw materials stay in the foam machine The time should be controlled within 3 minutes, after which the modified polyester / p...
Embodiment 3
[0041] 1) waste old polyester / polyurethane blended fabric (wherein polyester is polyethylene terephthalate, and its content is 99% (mass fraction), polyurethane is polyester polyurethane, and its content is 1% (mass fraction) )) crushing, cleaning and vacuum drying to obtain polyester / polyurethane blended fabric fragments with a moisture content of 97ppm;
[0042] 2) polyester / polyurethane blended fabric fragments and styrene-maleic anhydride copolymer (wherein the maleic anhydride unit content is 5% (molar ratio)) powder (powder diameter is 0.5 mm) accounting for 5% of its mass fraction, The antioxidant Irgafos168, which accounts for 0.02% of its mass fraction, is fully mixed and uniformly pre-melted and agglomerated in a polyester foam granulator at a temperature of 220°C. The time should be controlled within 1min, after which the modified polyester / polyurethane foam is obtained;
[0043] 3) The modified polyester / polyurethane foam is vacuum-dried to ensure a moisture conte...
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