The invention discloses a preparation method of biodegradable polyvinyl alcohol resin packaging materials. The preparation steps are as follows: Step one, adding 100-150 g of polyvinyl alcohol into 500-1000 g of deionized water, heating to 60-70℃ and stirring for 10-30 minutes. Step two, sequentially adding 2.5-6 g of modified chitosan, 1.5-2.5 g of deoxidizer, 5-8 g of nano filler and 2-6 g of modified microcrystalline cellulose under continuous stirring for uniform mixing. Step three, feeding the mixture into a twin-screw extruder for melt kneading and extrusion to produce polyvinyl alcohol resin packaging materials. Modified chitosan is well dispersed in the resin matrix without agglomeration, ensuring uniform material performance. Enhanced molecular reactivity improves interfacial compatibility and mechanical strength of the composite.
Area Code: CN
Application Number: CN202411807333.5
