High-strength and easily-degradable composite material for garbage bag
A composite material and garbage bag technology, which is applied in the field of high-strength and easily degradable composite materials for garbage bags, can solve the problems of insufficient tensile strength, great influence on strength and weather resistance, and low elongation at break.
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Embodiment 1
[0030] A high-strength and easily degradable composite material for garbage bags. According to the number of parts by mass, the components of the composite material include: 80 parts of polyvinyl chloride resin, 4 parts of polyamide resin, 2 parts of TPVC elastomer, 50 parts of modified starch, 6 parts of solvent, 8 parts of plasticizer, 6 parts of reinforcing agent, 3 parts of degradation catalyst, 1 part of stabilizer.
[0031] In this embodiment, the method for preparing modified starch includes the following steps:
[0032] (1) Mix the high-viscosity starch and water according to the mass ratio of 1:4, stir in the reactor at a temperature of 45℃ to obtain the starch solution; add 5wt% sodium hydroxide solution dropwise to the starch solution to adjust the starch solution PH value to 8.7, stir evenly at 55r / min for 5min;
[0033] (2) Add 180% of the starch mass of titanium dioxide, 7% of dextran, 12% of fucoidan, 2% of tetradecenyl succinic anhydride and 3.5% of coupling agent in...
Embodiment 2
[0044] A high-strength and easily degradable composite material for garbage bags. According to the number of parts by mass, the components of the composite material include: 95 parts of polyvinyl chloride resin, 7.5 parts of polyamide resin, 5 parts of TPVC elastomer, and 60 parts of modified starch. 10 parts of solvent, 15 parts of plasticizer, 10 parts of reinforcing agent, 6 parts of degradation catalyst, 4 parts of stabilizer.
[0045] In this embodiment, the method for preparing modified starch includes the following steps:
[0046] (1) Mix the high-viscosity starch and water according to the mass ratio of 1:4, stir in the reactor at 65℃ to obtain the starch solution; add 5wt% sodium hydroxide solution dropwise to the starch solution to adjust the starch solution PH value to 9.0, stir evenly for 8min at a speed of 70r / min;
[0047] (2) Add 180% of the starch mass of titanium dioxide, 7% of dextran, 12% of fucoidan, 2% of tetradecenyl succinic anhydride and 3.5% of coupling agen...
Embodiment 3
[0058] A high-strength and easily degradable composite material for garbage bags. According to the number of parts by mass, the components of the composite material include: 90 parts of polyvinyl chloride resin, 6 parts of polyamide resin, 4 parts of TPVC elastomer, 56 parts of modified starch. 8 parts of solvent, 12 parts of plasticizer, 8 parts of reinforcing agent, 4.5 parts of degradation catalyst, 2.5 parts of stabilizer.
[0059] In this embodiment, the method for preparing modified starch includes the following steps:
[0060] (1) Mix the high-viscosity starch and water in a mass ratio of 1:4, stir in the reactor at 55°C to obtain a starch solution; add 5wt% sodium hydroxide solution dropwise to the starch solution to adjust the starch solution PH value to 8.8, stir evenly for 7 minutes at a speed of 60r / min;
[0061] (2) Add 180% of the starch mass of titanium dioxide, 7% of dextran, 12% of fucoidan, 2% of tetradecenyl succinic anhydride and 3.5% of coupling agent into the r...
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