外卖食品包装用防水防油卡纸的制备及性能研究

Study on the preparation and performance of waterproof and oilproof cardboard for takeaway food packaging

为开发外卖食品包装容器,以白卡纸为基材,通过涂覆羧甲基壳聚糖(CMCS)溶液和聚乳酸(PLA)溶液制备防水防油纸,从而赋予卡纸防水和耐油性能,力学性能相比原纸也有所改善。本文研究了CMCS和PLA涂布量以及风干时间对卡纸的阻隔性和力学性能的影响。结果表明:涂布5%(wt)、涂布量为3.06 g/m^(2)的CMCS烘干后,再涂布5%(wt)、涂布量为15.86 g/m^(2)的PLA溶液,风干10 min后,卡纸的防油、防水和力学性能明显得到改善。CMCS/PLA涂布卡纸有较佳的防水防油性能。

In order to develop packaging containers for takeaway food,the waterproof and oilproof paper is made by using the white cardboard as the base material and by coating carboxymethyl chitosan(CMCS)solution and polylactic acid(PLA)solution to enhance the waterproof and oilproof properties of the paper.The mechanical properties of the paper after coating have also been improved compared to the original paper.The influences of CMCS and PLA coating amount and air-drying time on barrier and mechanical properties of the cardboard are studied.The results show that after drying CMCS coated with 5%(wt)and a coating amount of 3.06 g/m^(2),and then coated with a PLA solution of 5%(wt)and a coated amount of 15.86 g/m^(2) after air drying for 10 minutes,the oil resistance,water resistance and mechanical properties of the cardboard have been significantly improved.The CMCS/PLA coated cardboard has better water and oil resistance.