Indian Meal Moth (Plodia Interpunctella)–Resistant Food Packaging Film Development Using Microencapsulated Cinnamon Oil

Abstract

The LDPE-PP laminate film developed using microencapsulated cinnamon oil was effective to protect the model foods from the invasion of Indian meal moth larvae. The microencapsulated ink coating did not significantly change the tensile and barrier properties of the LDPE-PP laminate film, implying that replacement of the uncoated with coated laminate would not be an issue with current packaging equipment. The films showed the potential to be produced in commercial film production lines that usually involve high temperatures because of the improved thermal stability of cinnamon oil due to microencapsulation. The microencapsulated system may be extended to other food-packaging films for which the same ink-printing platform is used.

Development of Anti‐Insect Microencapsulated Polypropylene Films Using a Large Scale Film Coating System

“…As shown in Figure B, the %Δmass was 4.8% at 410 °C, potentially reflecting the degradation of CO, in addition to the mass reduction of the film itself. The boiling point of pure CO is 194 to 234 °C (Chemblink, ), and the amount of pure CO decreases by 99.9% when the temperature is raised from 29 to 410 °C at a rate of 10 °C/min (Kim et al., ). The %Δmass of the microencapsulated CO 1.7% film at 410 °C was 2.4%, which is similar to the %Δmass of the CO 0% film.…”

“…A thermogravimetric analysis was performed according to the method of Kim et al. () using a thermal analyzer (Model TA‐50, Shimadzu Corp., Kyoto, Japan). Eight mg of CO or prepared film samples (CO 0% film, CO 1.7% film, and microencapsulated CO 1.7% film) were placed into an aluminum crucible and heated from 25 to 600 °C at 10 °C/min to determine weight changes.…”

“…Recent studies have focused on essential oils extracted from plants as anti‐insect materials to replace synthetic chemicals (Chung et al., ). Cinnamon ( Cinnamomum zeylanicum ) oil (CO), a generally recognized as safe (GRAS) substance (Tzortzakis, ; USDA‐NOP, ), has been reported to possess anti‐insect effects against Tribolium castaneum, Sitophilus zeamais , and P. interpunctella (Huang & Ho, ; Jo et al., ; Kim, Song, Han, Park, & Min, ). Trans‐cinnamaldehyde (58.1%), benzaldehyde (12.2%), and eugenol (5.1%), which are major components of CO, may be involved in the anti‐insect activity (Yang, Lee, Lee, Clark, & Ahn, ).…”

“…Kim et al. () developed a CO‐microencapsulated plastic insect‐resistant material. Their study reported that microencapsulation helped maintain the bioactivity of CO in a high‐temperature production line used for conventional films.…”

Use of herbs, spices and their bioactive compounds in active food packaging

“…As in the case of herbs, biopolymers such as starch, cellulose derivatives, chitosan, proteins or gums have been proposed as carrier matrices for spice extracts (Table 3). EOs from spices have been usually incorporated into polymer matrices by casting [72][73][74][75][76][77] or surface coating 29,55,[78][79] . New active packaging materials consisting of self-adhesive PP labels with cinnamon EOs inside PET trays were used to extend the shelf-life in late-maturing peach fruits 80 .…”