用于水果初次包装的活性包装纸的机械性能和抗菌效果研究

Mechanical Properties and Antimicrobial Efficacy of Active Wrapping Paper for Primary Packaging of Fruits

0引言言活性包装(Active Packaging)又称AP包装,属于一种智能型包装,是指在包装袋内加入各种气体吸收剂和释放剂,以除去过多的CO2、乙烯及水气,并及时补充O2。

The present study reports the effect of antimicrobial agents(potassium sorbate and potassium metabisulphite) and an ethylene scavenger(sodium permanganate) as coating material on wrapping paper for individual packing of fruits.The effect of these coatings on the paper's physical strength and antimicrobial efficacy was modeled using regression analysis(R2> 79.5%).Optimization of the composition of the coating solution was done such as to obtain maximum strength and antimicrobial efficacy of the paper.The inhibitory effect of sodium permanganate on growth of Candida pelliculosa(58%) was most evident,however it had a weakening effect on the physical strength of paper(tensile strength,percent stretch,tensile energy absorption and stiffness).Potassium sorbate exhibited lesser deleterious effect on the physical strength parameters while decreasing growth of C.pelUculosa and Kloeckera apis(> 18.8%).Paper coated with optimized combination of chemicals(degree of desirability;0.835) was tested for its effect on the physicochemical changes of climacteric fruits like peach and plum during storage at room temperature(32 ±2℃).Physiological changes were much less in active wrapped fruits after six days of storage as compared to unwrapped fruits.This was especially notable in case of puncture resistance(85%increase) and total soluble solids(4 ± l°Brix increase) in control fruits,compared to 64%and l°Brix increase respectively,in active wrapped fruits.Thus,use of active wrapping paper will be quite useful for extending the marketable period of climacteric fruits thereby enhancing the marketability and profitability of retailer.