Page 31 - FMT Magazine, September 2020

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ADHESIVES FOR FOOD PACKAGING • Case and carton sealing- cereals Conclusion: Adhesive packaging for
Based on the above mentioned • Folding boxes- confectionary, foods are durable and can preserve
characteristics, the adhesives used biscuits and frozen meals food for a long period of time than
in food packaging are mentioned as • Wrap around- chocolate any other packaging materials. The
following1: • Bag-in-box- Juice, wine adhesives can effectively resist water
vapour with good transparency.
Emulsion/ Dispersion based e) Cold seals- These can be used Due to their high tensile strength,
adhesives: These are further of in the temperature range of 15- low packaging cost and multiple
following types: 25°C. Applications- Ice-creams, applications, adhesive packaging can
chocolates and biscuits. be a boon for the food industry.
a) Vinylacetate based homo and Reclosable food packaging-
copolymer dispersions- These are chocolate bars References
used for production and processing • Toenniessen, M. (2018). Packaging
of packaging made of paper. These f) Heat seals- These are used for materials- adhesives for food packaging
can be utilized in different forms: lidding applications, where applications. A report by International
aluminium or plastic lids are Life Science Institute, pp. 4-32.
• Bags- Sugar bags, bread bound to food containers. Appli- • https://www.ncbi.nlm.nih.gov/pmc/
• Cardboard and corrugated boards- cation- Packaging of dairy prod- articles/PMC6213312/
Fruits/ vegatables ucts such as yogurts, plastic • https://www.ncbi.nlm.nih.gov/pmc/
• Folding box- Side beam trays and instant noodle cups. articles/PMC7037176/
• Pouches and snacks- Milk powder, • https://onlinelibrary.wiley.com/doi/
fl our Polyurethane adhesives: These have full/10.1002/pts.2367
• Core and tube winding- Aluminium high flexibility and bonding strength. • https://www.nature.com/articles/

foil s41467-019-13449-y
Application- a) Bags for coffee powder • https://www.ncbi.nlm.nih.gov/pmc/
b) Pressure sensitive adhesives- and chips at room temperature (31°C) articles/PMC5666723/
These can adhere to the or low temperature (0-4°C). • https://www.ncbi.nlm.nih.gov/pmc/
surface when gentle pressure is articles/PMC6889139/
applied. These have permanent b) Flexible packaging of aggressive • https://www.ncbi.nlm.nih.gov/pmc/
adequate cohesion. Application: food stuffs such as fruit juices or articles/PMC6571881/
Self-adhesive paper and fi lm liquid pet food- used for elevated • https://www.researchgate.net/
labels or tapes. Labels can be temperature, which is found in publication/230582585_Comparison_
applied on food, such as, fruits pasteurization or retort applications. of_the_adhesives_used_in_food_
and vegetables as well as packaging_multilayer_materials_and_
sausages. Water- based adhesives: These are migration_studies_from_packaging_
the natural polymers, which are of to_food
c) Laminating adhesives- These different types: • https://www.researchgate.net/
include acrylic dispersions to publication/328573412_Effect_of_
produce multi-layer lamination Application: a) Adhesives containing high-pressure_processing_on_

of various films. These can starch (dextrin or casein)- used in characteristics_of_fl exible_packaging_
be applied for retorts, acrylic labelling applications. Starch glues for_foods_and_beverages
dispersions are cross-linked are widely used for production of
with water-dispersible aliphatic corrugated boards.
polyisocyanates.
b) Casein adhesives- These are used
d) Hot melt adhesives- These can for labels of cold and wet bottles. * Author is Assistant Professor, CT
be applied for carton and case University, Ludhiana
closing. They can be applied for: c) Colloidal adhesives- These ** Author is Student, CT University,
adhesives contain tackifi er resins, Ludhiana
• Tray erection- fruits, vegetables eg. Plastic bottles

Food Marketing & Technology 31 September 2020