Preparation method of full-biodegradable environment-friendly bag
An environmental protection bag, a fully biological technology, applied in the field of preparation of fully biodegradable environmental protection bags, can solve environmental hazards, difficult to deal with plastic waste and other problems, achieve the effect of small investment in the factory area, good water and oil resistance, and a single reactor
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specific Embodiment 1
[0025] Step 1: Take 30% starch and add 15% polyvinyl alcohol to mix for 30 seconds and 1.5% solubilizer in a high-speed mixer for 2 hours to obtain modified starch.
[0026] Step 2: Mix the modified starch with 20% polylactic acid and heat to 120°C, add 2.5% aluminate coupling agent and stir for 3 hours, dry at 80°C and mix in a double-drum mill for 1 hour;
[0027] Step 3: Add 6% glycerin to the mixed product and send it to the extruder for granulation to obtain a masterbatch, and add the additive ethylene-vinyl acetate copolymer (EVA) to the masterbatch and heat it to 240 ° C to melt, send Put it into the film blowing machine, carry out the film blowing work, and use the supporting mold to make the fully biodegradable environmental protection bag.
[0028] The fully biodegradable environmental protection bag is prepared, and the weight loss rate can reach 45% under the soil burial test conditions for 30 days, and the weight loss rate can reach 76% under the soil burial test ...
specific Embodiment 2
[0030] Step 1: Mix 60% of starch with 45% polyethylene for 30 seconds and 1.5% solubilizer in a high-speed mixer for 2 hours to obtain modified starch.
[0031] Step 2: Mix the modified starch with 50% polylactic acid and heat to 120°C, add 2.5% aluminate coupling agent and stir for 5 hours, dry at 90°C and mix in a double-drum mill for 1 hour;
[0032] Step 3: Add 10% glycerin to the mixed product and send it to the extruder for granulation to obtain a masterbatch, and add the additive polycaprolactone PCL to the masterbatch and heat it to 240°C to melt, and send it to the film blowing machine , carry out film blowing work, and use supporting molds to make fully biodegradable environmental protection bags.
[0033] The fully biodegradable environmental protection bag is prepared, and the weight loss rate can reach 47% under the soil burial test conditions for 30 days, and the weight loss rate can reach 79% under the soil burial test conditions for 60 days, and can be complete...
specific Embodiment 3
[0035] Step 1: Take 35% starch and add 35% PVA-1797 polyvinyl alcohol for 30 seconds and 1.5% solubilizer for 2 hours in a high-speed mixer to obtain modified starch.
[0036] Step 2: Mix the modified starch with 50% polylactic acid and heat to 120°C, add 2.5% aluminate coupling agent and stir for 3 hours, dry at 90°C and mix in a double-drum mill for 1 hour;
[0037] Step 3: Add 10% glycerin to the mixed product and send it to the extruder for granulation to obtain a masterbatch, and add the additive polyhydroxyalkanoate to the masterbatch and heat it to 240°C to melt, then send it to the film blowing machine , carry out film blowing work, and use supporting molds to make fully biodegradable environmental protection bags.
[0038] The fully biodegradable environmental protection bag has been prepared. After testing, the article that generates water vapor after packaging has the advantage of not condensing fog droplets inside the film, which plays a moisture-proof role. At th...
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