Military Researchers Present Work on Recycled 3D Printing Material
The military researchers presented their work this week at the 256th National Meeting & Exposition of the American Chemical Society.
“Ideally, soldiers wouldn’t have to wait for the next supply truck to receive vital equipment,” said Nicole Zander, PhD. “Instead, they could basically go into the cafeteria, gather discarded water bottles, milk jugs, cardboard boxes and other recyclable items, then use those materials as feedstocks for 3D printers to make tools, parts and other gadgets.”
According to the US Government Accountability Office, the Department of Defense has an inventory of 5 million items distributed through eight supply chains in order to keep military personnel supplied with food, fuel, ammunition and spare parts. Few of these items are stockpiled at front-line locations, however, meaning that shortages can occur at critical times. Many of these front-line locations do have 3D printers, but they often have to wait an extended period of time for feedstock to be replenished.

Nicole Zander, ARL, demonstrates equipment for Capt. Anthony Molnar, U.S. Marine Corps. [Image: Jhi Scott/US Army]
Originally, the researchers found that other types of plastic, like polypropylene (PP), which is found in yogurt and cottage cheese containers, and polystyrene (PS), used in plastic utensils, were not practical for 3D printing, but some tinkering made them more useful. They strengthened the PP by mixing it with cardboard, wood fibers and other cellulose waste materials, and they also blended PS with PP to make a strong and flexible filament.
The team used a process called solid-state shear pulverization to create composite PP/cellulose materials. Shredded plastic and paper, cardboard or wood flour was pulverized in a twin-screw extruder to generate a fine powder, which was then melted and processed into filament. The researchers tested the new composites and discovered that they had improved mechanical properties that could be used to 3D print strong objects.
Zander and her team are building a mobile recycling center that will allow trained soldiers to make 3D printing filaments out of plastic waste. They are also looking into ways to 3D print from plastic pellets instead of filament, which could allow for the printing of larger objects.
“We still have a lot to learn about how to best process these materials and what kinds of additives will improve their properties,” Zander said. “We’re just scratching the surface of what we can ultimately do with these discarded plastics.”
Discuss this and other 3D printing topics at 3DPrintBoard.com or share your thoughts below.
You May Also Like
Thor3D & ProtoTech Solutions Combine 3D Scanning with Body Measuring Software
Germany and Russia-based handheld 3D scanner developer Thor3D, creator of such scanning systems as the Calibry and the (now discontinued) Drake, has been practicing its trade since 2015. Recently, the...
Maker of CREATOR Metal 3D Printer to Be Bought by Lumentum for $5.7B
There have been several important acquisitions in the 3D printing industry, including that of EnvisionTEC by Desktop Metal, Origin by Stratasys, and 3D Hubs by Proto Labs, leading us to...
Towards Zero Waste and Failures: AdditiveLab’s Customizable Simulation Enables Increase in Metal Additive Manufacturing Efficiency
AdditiveLab’s Mariam Mir will be speaking at 3DPrint.com’s upcoming AMS online industry summit (Feb 9-10, 2021). Register here. Metal additive manufacturing (AM) process simulation predicts the potential production outcome and gives vital...
Dream M&As: 3D Printing Mergers and Acquisitions We’d Like to See in 2021, Part 3
Inspired in part by the acquisition of EnvisionTEC by Desktop Metal, of 3D Hubs by ProtoLabs, and of Origin by Stratasys, we’ve been brainstorming about the newly hot 3D printing stocks and renewed interest...
Services & Data
Printer & Scanner Price QuotesUpload your 3D Models and get them printed quickly and efficiently.