All-biodegradable modified polylactic acid film-blowing resin and preparation method thereof
A technology of biodegradation and polylactic acid, which is applied in the field of modified polylactic acid blown film grade resin and its preparation, can solve the problems of material tension reduction, cost increase, ductility reduction, etc., and achieve good processing performance and cost reduction.
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[0025] Example 1
[0026] A completely biodegradable modified polylactic acid blown film grade resin, in terms of weight percentage, the modified polylactic acid blown film grade resin is made from the following components:
[0027]
[0028]
[0029] Prepared as follows:
[0030] In step 1, the polylactic acid (PLA), polyadipate / butylene terephthalate (PBAT), polypropylene carbonate resin (carbon dioxide-based material PPC), talc, ethylene-acrylic acid copolymer, PE Add the wax into the low-speed mixer for stirring and mixing, and then add the required percentage of chain extender, erucamide, zinc stearate (Zist), melt enhancer, anti-hydrolysis stabilizer, and then transfer to the high-speed mixer. After stirring and mixing, the mixture can be obtained;
[0031] Step 2, the mixture in step 1 is stirred in separate pots according to 150-250kg, and the stirring time of each pot is 8-10 minutes, and no heating is required during stirring. The temperature must be kept bel...
Example Embodiment
[0035] Example 2
[0036] The difference between this example and Example 1 is that the composition ratio of the modified polylactic acid blown film grade resin is different. In terms of weight percentage, the modified polylactic acid blown film grade resin of this embodiment is composed of the following components production:
[0037]
[0038] The modified polylactic acid blown film grade resin provided in this example is used to make a film product, which is stored for 18 months at a normal temperature of 23°C without change; the biodegradation rate under forced composting is 93.8% within 90 days.
Example Embodiment
[0039] Example 3
[0040] The difference between this example and Example 1 is that the composition ratio of the modified polylactic acid blown film grade resin is different. In terms of weight percentage, the modified polylactic acid blown film grade resin of this embodiment is composed of the following components production:
[0041]
[0042] The modified polylactic acid blown film grade resin provided in this example is used to make a film product, which is stored for 18 months at a normal temperature of 23°C with no change; the biodegradation rate under forced composting is 94.6% within 90 days.
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