Currently, due to scarcity of hydrocarbon resources
and the extensive use of water based, solvent based and hot melt adhesives in
wood bonding in furniture industries and packaging industries that demand
recyclability, compostability and bio-degradability, recently attention
has been concentrated to making these
formulations completely bio-based, sustainable and biodegradable. Biodegradable hot melt adhesives (HMAs)
prepared from natural sources have a potential for use in furniture and
packaging industriesbecause of an increase
in awareness of environmental issues, the replacement of conventional petroleum-derived hydrocarbon raw materials
by renewable, biodegradable and sustainable materials has developed. In
terms of environmental issues, such as climate crisis due to an increase of
carbon dioxide emission, attempts have been
made to produce HMAs using non-hydrocarbon resins, such as polylactic
acid (PLA)-based resins, containing no petroleum as a raw material. Polylactic acid was prepared by
self-condensation reactions of lactic acid or by lactide ring opening
polymerisation, and used for packaging materials, sanitary pads, diapers etc., especially adhesives owing to its excellent
processability and the excellent mechanical properties of its HMAs
products. Therefore, recently the use
of PLA materials as a substitute for non-biodegradable hydrocarbon-based
polymers can be considered to be environmentally favourable. Here, we discussed
the various uses of PLA as a sustainable and bio-degradable and sustainable hot
melt adhesive.
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