Innovative Solutions for Reusing Packaging Waste Materials in Humanitarian Logistics

: The impact of packaging waste on the environment is becoming unsustainable, which has necessitated a turning point in material recycling and reuse. Such a concept is highly relevant in the humanitarian supply chain due to the huge mass of packaging items that are provided to countries hit by disasters, with these bad conditions making it almost impossible to adopt a rational management of waste streams. The goal of this study is to provide an approach and feasible solutions to reduce the environmental inﬂuence of waste produced by packaging and at the same time, to help people affected by disasters. Starting from the analysis of the available materials, several solutions of packaging reuse and recycling are developed and several prototypes are realized and tested in collaboration with the United Nations Humanitarian Response Depots-Lab (UNHRD-Lab), which starts from the basic packaging materials used to supply ﬁrst-aid to people, including cardboard, pallets, woods, and plastics. This paper addresses the above ideas and presents the design process, results and some quality tests. The experimental evidence encourages future on-ﬁeld validation in refugee camps.

Among the weaknesses coming from the massive use of packaging materials, their environmental impact is becoming unsustainable due to the raw resource use as well as the amount of CO 2 emissions and environmental pollutants caused by their disposal and landfilling. Thus, the market has been encouraged to mitigate these environmental problems by designing packaging with sustainable materials and experimenting with new models and packing methods [29][30][31]. It is also important to study new strategies and approaches to optimize the treatment of packaging waste to improve global sustainability.

Method and Materials
This section presents the adopted methodology and input materials for facing the two-fold problem of treating the packaging waste materials in humanitarian camps and emergency areas and to provide aids to people living in extreme poverty that lack certain basic needs. Figure 1 proposes the methodology adopted in the present paper. Two study directions appear. On one hand, this involves the analysis of the current standard in humanitarian aids that ships tons of goods to the emergency areas and are responsible for most of the packaging waste materials. On the other hand, this include the investigation and prioritization of the basic needs of people living in such areas.

Method
Concerning the former direction, multiple humanitarian missions were analyzed with the aim of creating lists of shipped materials together with their standard packaging solutions. Such a list is directly correlated to the key streams of packaging waste materials that need to be managed in terms of variety and quantity.
Concerning the latter direction, given the structure and facilities within humanitarian camps, an ordered list of basic needs to supply is provided, which forms the basis for conceiving the original reuses of packaging waste materials.
Starting from the evidence of these two research directions, the generation, design, development, prototyping, lab-test and assessment of multiple solutions of secondary products generated from while the final field-test and diffusion of the most promising solutions is among the forthcoming activities. Figure 1. Schematic of the adopted methodology.

Input Materials
According to the first study direction, we evaluated the quantity and variety of the packages usually shipped by the humanitarian organizations to the staging areas and areas close to the catastrophe strike places. In these areas, goods and equipment are stocked, sorted and distributed to people.
In collaboration with the UNHRD-Lab, we conducted a previous study [40] that examined the shipments during 2012 to determine the set of typical humanitarian aids and of most interest, to collect more than 100 packaging lists, which is essentially the list of packaging materials containing products, tools and other aids. Table 1 presents an extract of the analysis that classifies the packaging materials according to their nature for each list and the percentage of the packaging material mass (PM) in the total gross mass (GM) in the last column.

Input Materials
According to the first study direction, we evaluated the quantity and variety of the packages usually shipped by the humanitarian organizations to the staging areas and areas close to the catastrophe strike places. In these areas, goods and equipment are stocked, sorted and distributed to people.
In collaboration with the UNHRD-Lab, we conducted a previous study [40] that examined the shipments during 2012 to determine the set of typical humanitarian aids and of most interest, to collect more than 100 packaging lists, which is essentially the list of packaging materials containing products, tools and other aids. Table 1 presents an extract of the analysis that classifies the packaging materials according to their nature for each list and the percentage of the packaging material mass (PM) in the total gross mass (GM) in the last column. The incidence of the packaging materials is about 10.81% of the total mass, which is proportional to the relevant costs to ship materials that become waste immediately after the product are unbundled. Local reuse and recycling of such packaging materials is of great interest from both economic and environmental perspectives. To this purpose, some materials are easier to reuse as pallets. Plastic and cardboard are not conceived to have an as-is reuse but they can be reshaped quite easily to create different items.
Because of its large availability and versatility, this study focuses on cardboard from carton boxes as the material waste to reuse. Standard boxes are corrugated fiberboard boxes or regular slotted containers made with double wallboard flute paper with a thickness of 5-7 mm. The thickness and the double wallboard make the cardboard very strong and easy to fold and bend without advanced tools.

Refugee Needs
The needs of people in humanitarian camps and emergency areas are basic as they only require what is important for their survival and daily living. Past studies present the classifications of such needs starting from the micro-scale, such as the needs of the person, through the mid-scale, such as the needs of small groups of people as a family, to the large-scale, such as needs of the community living in the same area [40]. At all the three levels, the solutions are of great importance to guarantee acceptable living conditions, to prevent health risks, to preserve the living areas and to set the foundation for restarting normal living conditions. This study targets the micro-and mid-scale levels presenting and validating basic prototypes that are useful for the people and family everyday activities, such as moving items, sleeping, sitting, walking, etc. Section 3 details these solutions, which we conceived and tested in partnership with the UNHRD-Lab.

Prototyping from Cardboard Packaging Waste
Cardboard is one of the most used materials in the packaging of humanitarian items (see Table 1). Double wallboard is a robust material with low weight, which is easy to handle and to cut. Thus, it can be used to obtain different types of equipment even by common people with raw working tools. Such conditions make this packaging waste material a good candidate to investigate.

Carton Backpack
People living in an emergency camp often have to go to common areas that are usually far from their own accommodation to get food or other objects useful for their daily life. They normally do not have effective supports to transport food and other materials. Thus, we began by making a robust backpack from the reused cardboard boxes. Figure 2 shows the design of the proposed backpack. Using the proposed design and maintaining the same dimensional relations, it is possible to create a backpack with an appropriate capacity and payload. This backpack is simple to build and it is designed and developed with reproducibility in mind. Its construction does not require complex tools as it only needs a pair of scissors, a simple knife and some packaging tape. To help people who live in humanitarian refugee camps, it is possible to add some packaging tape in the relief packs so that they can make equipment for themselves as presented here. Figure 3 shows the carton backpack that was built using reused packaging from a kitchen set usually shipped by UNHRD in emergency areas. Carton backpack prototypes were tested with regard to payload, shock and damage resistance both in the Laboratory of Industrial Engineering, Bologna University and in the UNHRD-Lab. Th results were encouraging. The backpack has a good capacity and an outstanding payload. For example, the backpack in Figure 3 can hold 12 liters and up to 20 kg of payload for a long time in a dynamic environment with hits. The breaking strength tests show that the carton backpack fails at an average load of 32.4 kg. This is an unexpectedly high result due to the backpack material being reused materials.

Carton Cradle
Many infants live in refugee camps and require specialized equipment, such as cradles. The design of a prototype of carton cradle ( Figure 4) was developed, with a simple cradle structure using a joint framework. The dimensions of the cradle could be modified based on the age and size of the infant. Using the proposed design and maintaining the same dimensional relations, it is possible to create a backpack with an appropriate capacity and payload. This backpack is simple to build and it is designed and developed with reproducibility in mind. Its construction does not require complex tools as it only needs a pair of scissors, a simple knife and some packaging tape. To help people who live in humanitarian refugee camps, it is possible to add some packaging tape in the relief packs so that they can make equipment for themselves as presented here. Figure 3 shows the carton backpack that was built using reused packaging from a kitchen set usually shipped by UNHRD in emergency areas. Using the proposed design and maintaining the same dimensional relations, it is possible to create a backpack with an appropriate capacity and payload. This backpack is simple to build and it is designed and developed with reproducibility in mind. Its construction does not require complex tools as it only needs a pair of scissors, a simple knife and some packaging tape. To help people who live in humanitarian refugee camps, it is possible to add some packaging tape in the relief packs so that they can make equipment for themselves as presented here. Figure 3 shows the carton backpack that was built using reused packaging from a kitchen set usually shipped by UNHRD in emergency areas. Carton backpack prototypes were tested with regard to payload, shock and damage resistance both in the Laboratory of Industrial Engineering, Bologna University and in the UNHRD-Lab. Th results were encouraging. The backpack has a good capacity and an outstanding payload. For example, the backpack in Figure 3 can hold 12 liters and up to 20 kg of payload for a long time in a dynamic environment with hits. The breaking strength tests show that the carton backpack fails at an average load of 32.4 kg. This is an unexpectedly high result due to the backpack material being reused materials.

Carton Cradle
Many infants live in refugee camps and require specialized equipment, such as cradles. The design of a prototype of carton cradle (Figure 4) was developed, with a simple cradle structure using a joint framework. The dimensions of the cradle could be modified based on the age and size of the infant. Carton backpack prototypes were tested with regard to payload, shock and damage resistance both in the Laboratory of Industrial Engineering, Bologna University and in the UNHRD-Lab. The results were encouraging. The backpack has a good capacity and an outstanding payload. For example, the backpack in Figure 3 can hold 12 liters and up to 20 kg of payload for a long time in a dynamic environment with hits. The breaking strength tests show that the carton backpack fails at an average load of 32.4 kg. This is an unexpectedly high result due to the backpack material being reused materials.

Carton Cradle
Many infants live in refugee camps and require specialized equipment, such as cradles. The design of a prototype of carton cradle (Figure 4) was developed, with a simple cradle structure using a joint framework. The dimensions of the cradle could be modified based on the age and size of the infant.  Starting from a common carton box, the two headboards and the two other rectangular sides of the cradle are drawn and cut. After attaching the four sides of the cradle, another rectangular carton was cut and mounted transversely to become a makeshift carton mattress. Figure 5 shows the completed carton cradle. The carton cradle prototype is tested with regard to its payload, which showed a resistance up to 15 kg. The breaking strength tests also show that the cradle fails at payloads above 22.6 kg due to the distortion and failure of the frame. Finally, Figure 4 shows how the frame is designed with minimal complexity using joint connections. Additionally, this type of frame increases the breaking strength of the cradle.

Carton Slippers
The majority of people living in an emergency camp have to walk without any type of shoes. To roughly solve this problem, a pair of very simple slippers were designed using carton boxes. Two versions were developed. The former used one carton-layer with a foot profile drawn onto the carton for sizing. To create the attachment for the top of the foot, a carton strip was drawn and attached to the foot profile. Finally, the slippers were covered with brown packaging tape. Brown packaging tape lends stability to slippers and covers all the shape, making these slippers water-resistant. Figure 6 shows this version. Starting from a common carton box, the two headboards and the two other rectangular sides of the cradle are drawn and cut. After attaching the four sides of the cradle, another rectangular carton was cut and mounted transversely to become a makeshift carton mattress. Figure 5 shows the completed carton cradle. Starting from a common carton box, the two headboards and the two other rectangular sides of the cradle are drawn and cut. After attaching the four sides of the cradle, another rectangular carton was cut and mounted transversely to become a makeshift carton mattress. Figure 5 shows the completed carton cradle. The carton cradle prototype is tested with regard to its payload, which showed a resistance up to 15 kg. The breaking strength tests also show that the cradle fails at payloads above 22.6 kg due to the distortion and failure of the frame. Finally, Figure 4 shows how the frame is designed with minimal complexity using joint connections. Additionally, this type of frame increases the breaking strength of the cradle.

Carton Slippers
The majority of people living in an emergency camp have to walk without any type of shoes. To roughly solve this problem, a pair of very simple slippers were designed using carton boxes. Two versions were developed. The former used one carton-layer with a foot profile drawn onto the carton for sizing. To create the attachment for the top of the foot, a carton strip was drawn and attached to the foot profile. Finally, the slippers were covered with brown packaging tape. Brown packaging tape lends stability to slippers and covers all the shape, making these slippers water-resistant. Figure 6 shows this version. The carton cradle prototype is tested with regard to its payload, which showed a resistance up to 15 kg. The breaking strength tests also show that the cradle fails at payloads above 22.6 kg due to the distortion and failure of the frame. Finally, Figure 4 shows how the frame is designed with minimal complexity using joint connections. Additionally, this type of frame increases the breaking strength of the cradle.

Carton Slippers
The majority of people living in an emergency camp have to walk without any type of shoes. To roughly solve this problem, a pair of very simple slippers were designed using carton boxes. Two versions were developed. The former used one carton-layer with a foot profile drawn onto the carton for sizing. To create the attachment for the top of the foot, a carton strip was drawn and attached to the foot profile. Finally, the slippers were covered with brown packaging tape. Brown packaging tape lends stability to slippers and covers all the shape, making these slippers water-resistant. Figure 6 shows this version. The latter version used two carton layers to provide more robustness. Two mirrored foot profiles were designed on the carton. Additionally, in this case, to create the attachment on the top of the foot, a carton strip was drawn. Finally, the slippers were covered with brown tape as before. Figure 7 shows this version. Moreover, to obtain more comfortable slippers, other layers of cardboard can be added to the lower surface of the slipper using brown tape as glue. Cardboard is a good material for this aim as its corrugate structure is able to adapt to the foot and the ground.

Carton Stool
Another useful object to help people in their everyday life coming from carton boxes is a small stool. First, two covers were created using three overlapped circular carton layers. After this, a cylinder of cardboard with the same diameter as the covers provided the vertical height. Finally, a last carton tube prevented the collapse of the stool. Figure 8 shows these components, which are namely the two covers, the cylinder and the tube, together with the assembled device.
The resistance tests show that an 80 kg person can safely sit and swing on the stool without failure for more than 500 sitting movements. The latter version used two carton layers to provide more robustness. Two mirrored foot profiles were designed on the carton. Additionally, in this case, to create the attachment on the top of the foot, a carton strip was drawn. Finally, the slippers were covered with brown tape as before. Figure 7 shows this version. The latter version used two carton layers to provide more robustness. Two mirrored foot profiles were designed on the carton. Additionally, in this case, to create the attachment on the top of the foot, a carton strip was drawn. Finally, the slippers were covered with brown tape as before. Figure 7 shows this version. Moreover, to obtain more comfortable slippers, other layers of cardboard can be added to the lower surface of the slipper using brown tape as glue. Cardboard is a good material for this aim as its corrugate structure is able to adapt to the foot and the ground.

Carton Stool
Another useful object to help people in their everyday life coming from carton boxes is a small stool. First, two covers were created using three overlapped circular carton layers. After this, a cylinder of cardboard with the same diameter as the covers provided the vertical height. Finally, a last carton tube prevented the collapse of the stool. Figure 8 shows these components, which are namely the two covers, the cylinder and the tube, together with the assembled device.
The resistance tests show that an 80 kg person can safely sit and swing on the stool without failure for more than 500 sitting movements. Moreover, to obtain more comfortable slippers, other layers of cardboard can be added to the lower surface of the slipper using brown tape as glue. Cardboard is a good material for this aim as its corrugate structure is able to adapt to the foot and the ground.

Carton Stool
Another useful object to help people in their everyday life coming from carton boxes is a small stool. First, two covers were created using three overlapped circular carton layers. After this, a cylinder of cardboard with the same diameter as the covers provided the vertical height. Finally, a last carton tube prevented the collapse of the stool. Figure 8 shows these components, which are namely the two covers, the cylinder and the tube, together with the assembled device.
The resistance tests show that an 80 kg person can safely sit and swing on the stool without failure for more than 500 sitting movements.

Conclusions and Future Research
Recently, the importance of packaging management and its increasing functions has become relevant due to innovations and new expectations in packaging materials and methods. According to the multifunctional packaging concept, logistics, marketing and sustainability are the fundamental roles that packaging should consider and integrate. At the same time, the environmental impact of packaging material and waste has risen due to the quantities and quality of such discharged materials. The reuse and recycle of packaging in the supply chain is fundamental, especially in certain supply chains, such as the humanitarian context.
The presented research proposes multiple methods to optimize the treatment of the end-of-life of packaging after their use in emergency fields and after they have fulfilled their primary transportation and stocking function. In collaboration with the United Nations Humanitarian Response Depots-Lab (UNHRD-Lab), we designed and tested several basic equipment for everyday life, including a backpack, cradle, slippers and stool, to aid people affected by disasters and simultaneously reduce the generation of packaging waste. The effectiveness of such devices was tested through basic measures of resistance, obtaining promising preliminary results encouraging future actions.
This study serves as a starting point for future research on the continuous optimization of approaches and methodologies for the reuse of packages in new and different applications in humanitarian supply chains. It could be interesting to test the developed objects in a refugee camp to understand their weaknesses and to attempt to improve them. As the experimental evidence is encouraging, in the near future, several of these prototypes will be sent into the field for testing, with collection of technical and social results.
Author Contributions: M.B. and F.P. revised the background and provided the methodology to be adopted; A.R. collected the input materials; M.G. and F.P. conceived the prototypes; M.B. and F.P. performed the lab-test collecting the results; A.R., M.B. and F.P. wrote the paper.

Acknowledgments:
The Authors express a deep sense of gratitude to the United Nations Humanitarian Response Depots-Lab (UNHRD-Lab), Brindisi, Italy for its support and valuable information provided during this study.

Conflicts of Interest:
The authors declare no conflict of interest.

Conclusions and Future Research
Recently, the importance of packaging management and its increasing functions has become relevant due to innovations and new expectations in packaging materials and methods. According to the multifunctional packaging concept, logistics, marketing and sustainability are the fundamental roles that packaging should consider and integrate. At the same time, the environmental impact of packaging material and waste has risen due to the quantities and quality of such discharged materials. The reuse and recycle of packaging in the supply chain is fundamental, especially in certain supply chains, such as the humanitarian context.
The presented research proposes multiple methods to optimize the treatment of the end-of-life of packaging after their use in emergency fields and after they have fulfilled their primary transportation and stocking function. In collaboration with the United Nations Humanitarian Response Depots-Lab (UNHRD-Lab), we designed and tested several basic equipment for everyday life, including a backpack, cradle, slippers and stool, to aid people affected by disasters and simultaneously reduce the generation of packaging waste. The effectiveness of such devices was tested through basic measures of resistance, obtaining promising preliminary results encouraging future actions.
This study serves as a starting point for future research on the continuous optimization of approaches and methodologies for the reuse of packages in new and different applications in humanitarian supply chains. It could be interesting to test the developed objects in a refugee camp to understand their weaknesses and to attempt to improve them. As the experimental evidence is encouraging, in the near future, several of these prototypes will be sent into the field for testing, with collection of technical and social results.
Author Contributions: M.B. and F.P. revised the background and provided the methodology to be adopted; A.R. collected the input materials; M.G. and F.P. conceived the prototypes; M.B. and F.P. performed the lab-test collecting the results; A.R., M.B. and F.P. wrote the paper.