Jute sticks based particle board-based boxes

Background/Problem Description:

Jute-stick residue generated during fibre extraction is largely underutilized and is commonly used for low-value applications. Existing jute-stick particleboards predominantly use formaldehyde-based adhesives, while limited research has addressed formaldehyde-free binder systems together with systematic optimization of board parameters and their conversion into functional horticultural packaging. The present innovation develops a formaldehyde-free jute-stick particleboard using polyvinyl alcohol (PVA), optimized with respect to binder concentration, particle feed density and board thickness, and converts the optimized board into rigid boxes for fruit and vegetable transportation. The developed boxes were subjected to mechanical, drop, vibration, stacking and transportation-related tests and successfully underwent a ~2700 km field transportation trial carrying approximately 12–15 kg produce in box inner dimension (36.5 cm x 29 cm x 27 cm) without structural damage. The innovation is intended for jute-processing industries, packaging manufacturers, farmers, horticultural or other goods supply chains, wholesalers, distributors and logistics operators. With an estimated production cost of approximately ₹240–250 per box, the technology provides a potential value-addition pathway for jute-stick residues and an alternative material for rigid horticultural packaging.

Technology Description:

The formaldehyde-free, jute-stick-based rigid particleboard packaging system has been developed and evaluated for the transportation and handling of fruits and vegetables and has potential for application in the transportation, storage and logistics of similar agricultural as well as any other goods. The solution converts an underutilized agricultural residue into a value-added engineered material by using polyvinyl alcohol (PVA) as an alternative binder to conventional formaldehyde-based resins. PVA was selected because of its film-forming ability, adhesion to lignocellulosic substrates and hydroxyl groups capable of interacting with the cellulose-rich jute-stick matrix. The innovation involves optimization of PVA concentration; particle feed density and board thickness to obtain the required combination of strength, stiffness and dimensional performance. In the study, increasing PVA concentration improved board strength, with the 24% PVA formulation achieving a modulus of rupture of 15.95 ± 0.95 MPa and tensile strength of 4.27 ± 1.54 MPa. The reported MOE of the developed boards was 2.64–3.16 GPa, demonstrating adequate structural stiffness. The board is fabricated into a rigid horticultural packaging box capable of carrying approximately 12–15 kg of fruits in box inner dimension (36.5 cm x 29 cm x 27 cm), and the box has been subjected to drop, vibration, compression, bending and stacking tests. The developed box also demonstrated practical durability during a ~2700 km road transportation trial between and return, remaining structurally intact after the journey.