High-barrier biodegradable free-standing bag and preparation method thereof
A biodegradable, high-barrier technology, applied in biological packaging, chemical instruments and methods, bags, etc., can solve the problems of high cost, white pollution, difficult recycling, etc., and achieve low production cost, oxygen transmission rate and water vapor. The effect of low transmittance and simple preparation process
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Embodiment 1
[0050] (1) 5 parts of PLGA (repeating unit-OCH 2 CO-proportion is 80%, M W 100000), 70 parts of PPC, 25 parts of PBS, 1 part of poly(N-propionylethyleneimine), 0.5 parts of phthalic anhydride, 0.2 parts of erucamide, 0.5 parts of nano-silica, 0.3 parts of white oil After mixing evenly, add it to a parallel twin-screw extruder, melt blend and air-cool and pelletize to prepare a high-barrier biodegradable self-sealing strip modified material;
[0051] (2) Add the modified material of the high-barrier biodegradable self-sealing strip prepared in step (1) into the bone bar extruder to melt and extrude, water-cooled and shaped, and harvested into a high-barrier biodegradable self-sealing strip;
[0052] (3) Mix 92 parts of PBAT, 7 parts of organically modified montmorillonite, 1 part of hyperbranched polyester HyPer C181, and 0.3 part of white oil into a parallel twin-screw extruder, melt blend and air-cooled granules to prepare the bonding layer modified material;
[0053] (4) ...
Embodiment 2
[0058] (1) 10 parts of PLGA (repeating unit-OCH 2 CO- accounts for 90%, M W 200000), 60 parts of PPC, 30 parts of PBS, 1 part of poly(N-propionylethyleneimine), 0.5 parts of phthalic anhydride, 0.2 parts of erucamide, 0.5 parts of nano-silica, 0.3 parts of white oil After mixing evenly, add it to a parallel twin-screw extruder, melt blend and air-cool and pelletize to prepare a high-barrier biodegradable self-sealing strip modified material;
[0059] (2) Add the modified material of the high-barrier biodegradable self-sealing strip prepared in step (1) into the bone bar extruder to melt and extrude, water-cooled and shaped, and harvested into a high-barrier biodegradable self-sealing strip;
[0060] (3) Mix 92 parts of PBAT, 7 parts of organically modified montmorillonite, 1 part of hyperbranched polyester HyPer C181, and 0.3 part of white oil into a parallel twin-screw extruder, melt blend and air-cooled granules to prepare the bonding layer modified material;
[0061] (4)...
Embodiment 3
[0066] (1) 10 parts of PLGA (repeating unit-OCH 2 CO- accounts for 90%, M W 200000), 70 parts of PPC, 20 parts of PBS, 1 part of poly(N-propionylethyleneimine), 0.5 parts of phthalic anhydride, 0.2 parts of erucamide, 0.5 parts of nano-silica, 0.3 parts of white oil After mixing evenly, add it to a parallel twin-screw extruder, melt blend and air-cool and pelletize to prepare a high-barrier biodegradable self-sealing strip modified material;
[0067] (2) Add the modified material of the high-barrier biodegradable self-sealing strip prepared in step (1) into the bone bar extruder to melt and extrude, water-cooled and shaped, and harvested into a high-barrier biodegradable self-sealing strip;
[0068] (3) Mix 92 parts of PBAT, 7 parts of organically modified montmorillonite, 1 part of hyperbranched polyester HyPer C181, and 0.3 part of white oil into a parallel twin-screw extruder, melt blend and air-cooled granules to prepare the bonding layer modified material;
[0069] (4)...
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