Preparation method of full-degradable express packaging bag
A packaging bag and fully degradable technology, which is applied in the field of preparation of fully degradable express packaging bags, can solve the problems of non-degradable express packaging bags, lack of strength performance, and packaging bags that cannot be used in the express industry, and achieve excellent flexibility and good performance. Effect of colorability and utilization improvement
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Embodiment 1
[0029] A kind of preparation method of fully degradable express packaging bag of the present invention comprises the following steps:
[0030] (1) Add 1.0g of vegetable oil and 0.8g of calcium hydroxide to 100g of plant straw, mix evenly, place in a 90°C oven for 2 hours, set the temperature in the third zone of the mixer to 140°C, and the screw speed to 8rpm, change After 10 minutes, the modified hot-melt plant straw is obtained;
[0031] (2) Mix 30g of chemically modified starch, 70g of modified plant straw, 0.8g of soybean oil, 0.8g of calcium hydroxide, 0.5g of Ac316, and 1.0g of G22, and place them in an oven at 90°C for 2 hours. Set the temperature in the third zone of the mill to 140°C, set the screw speed to 9 rpm, and knead for 10 minutes;
[0032] (3) Continue to place it on the conical twin platform and utilize the conical twin-screw extruder to granulate;
[0033] (4) The obtained mixture was used at 120° C. to prepare a film for a packaging bag with a polymer fi...
Embodiment 2
[0038] A kind of preparation method of fully degradable express packaging bag of the present invention comprises the following steps:
[0039] (1) Add 1.2g of vegetable oil and 1.2g of calcium hydroxide to 100g of plant straw, mix evenly, place in an oven at 100°C for 2 hours, set the temperature in the third zone of the mixer to 125°C, and the screw speed to 9rpm, change After 20 minutes, the modified hot-melt plant straw is obtained;
[0040] (2) Mix 40g of chemically modified starch, 60g of modified plant straw, 1.0g of soybean oil, 0.9g of calcium hydroxide, 0.6g of Ac316, and 1.0g of G22, and place them in an oven at 90°C for 2 hours. Set the temperature in the third zone of the machine to 145°C, set the screw speed to 10rpm, and knead for 20min;
[0041] (3) Continue to place it on the conical twin platform and utilize the conical twin-screw extruder to granulate;
[0042] (4) The obtained mixture was used at 120° C. to prepare a film for a packaging bag with a polymer...
Embodiment 3
[0045] A preparation method for fully degradable express packaging bags, comprising the following steps:
[0046] (1) Add 1.4g of vegetable oil and 1.4g of calcium hydroxide to 100g of plant straw, mix well, place in a 90°C oven for 1.5h, set the temperature in the third zone of the mixer to 140°C, and the screw speed to 12rpm, After 25 minutes of modification, the modified hot-melt plant straw is obtained;
[0047] (2) Mix 45g of chemically modified starch, 55g of modified plant straw, 1.2g of soybean oil, 1.5g of calcium hydroxide, 0.5g of Ac316, and 1.6g of G22, and place them in an oven at 90°C for 2 hours. Set the temperature in the third zone of the machine to 140°C, set the screw speed to 10rpm, and knead for 10min;
[0048] (3) Continue to place it on the conical twin platform and utilize the conical twin-screw extruder to granulate;
[0049] (4) The obtained mixture was used at 130° C. to prepare a film for a packaging bag with a polymer film forming machine.
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