Ethan Clarke
Plastic is a versatile material that is widely used in the military for various purposes, from packaging and disposable items to the fabrication of durable equipment and tactical gear for troops. With the world producing a staggering amount of plastic waste, there is a growing concern about its environmental impact, especially the proliferation of single-use plastics and microplastics. The military, a significant consumer of plastics, is not exempt from this issue. So, what happens to the plastic waste generated by our troops? Are there sustainable practices in place to manage and recycle this waste stream?
| Characteristics | Values |
|---|---|
| Use of recycled plastic | The US Marine Corps and research specialists are now collaborating to build a mobile recycling trailer for specially trained soldiers to fabricate 3D printing filaments from plastic waste. |
| Benefits of military plastics | Military plastics can be as durable as metals but will help reduce the weight of the equipment. Plastic resins offer short lead times to have the product ready. |
| Plastic resins | Plastic resins can help upgrade stealth functions for military operations. Domes with polymer elements can shield detection tools and hide vibrations on ships and planes. |
| Plastic waste | According to the OECD, the world produced more than 460 million metric tons of plastic waste in 2019, already double the amount produced in 2000. |
| Plastic waste sources | The most common types of plastic waste found in the environment are cigarette butts, food wrappers, bottles and bottle caps, shopping bags, straws, and stirrers. |
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What You'll Learn
- The US army recycles plastics to repair military equipment
- Plastic resins improve stealth functions for military operations
- Plastic is used in military equipment to improve flexibility and durability
- Plastic resins offer short lead times for product readiness
- Recycling plastic waste reduces environmental destruction
The US army recycles plastics to repair military equipment
The US Department of Defense is one of the world's biggest contributors to plastic waste. The discarded packaging from meals, known as MREs (meals, ready to eat), alone adds up to 14,000 tons of waste annually. The US Army is taking steps to address this issue by implementing recycling initiatives to repair military equipment.
The US Army Research Laboratory (ARL) has developed a process called solid-state shear pulverisation to create composite thermoplastic filaments. This process involves shredding waste, mainly plastic bottles, paper, and cardboard, and pulverising it into a fine powder using a twin-screw extruder. The powder is then melt-processed into 3D printer filament, which has improved strength and can be used to repair military trucks, weapons, and other tools. This technology enables soldiers to rapidly develop the tools they need to keep up with ever-changing enemy tactics and equipment.
The US Marine Corps is also collaborating with research specialists to build a mobile recycling trailer. Specially trained soldiers will be able to fabricate 3D printing filaments from plastic waste, reducing the wait time for new filaments, which can take up to a month. This initiative is part of a larger effort by the Defense Advanced Research Projects Agency (DARPA) to mine the military's trash for resources to sustain operations in hostile environments.
The benefits of using plastics in military equipment design further incentivise the US Army to recycle plastics. Plastics are much lighter than metals, reducing equipment carry weights and increasing user agility and safety. They are also more durable and outperform metals in terms of resistance to heat, chemicals, moisture, and impact. The colour and finish of plastic equipment can be customised during production, eliminating the need for secondary painting or coating operations. Additionally, plastic parts can be designed with complex geometries, allowing for various assembly methods such as welding, heat staking, or mechanical snap-fit.
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Plastic resins improve stealth functions for military operations
Military operations require equipment that is lightweight, strong, and highly functional. Plastic resins have emerged as a viable alternative to metal components in military applications, offering enhanced stealth capabilities and improved functionality.
Plastics have become increasingly important for the military due to their superior characteristics, such as high durability, heat resistance, and the ability to withstand harsh conditions. Additionally, plastics are more cost-effective than metals, reducing the total cost of ownership for military equipment.
One of the critical advantages of plastic resins in military operations is their ability to enhance stealth functions. Traditional metal components often leave large electromagnetic radar/sonar signatures and infrared heat source footprints, making detection by enemy forces easier. Plastic resins, on the other hand, offer improved stealth capabilities due to their non-conducting and insulating properties.
Plastic resins are used in various military applications to increase stealth. For example, domes constructed from polymer matrix composites are installed on military ships and aircraft to shield detection equipment and dampen position-revealing vibrations. Similarly, military helicopters are equipped with polymer foam blades and Kevlar-carbon fiber structural materials, enhancing their multi-spectral stealth capabilities, including radar, infrared, and acoustic signatures.
The use of plastic resins in military coatings is another stealth enhancement technique. Flexible, polymer matrix-based coatings are applied to military vehicles to thwart both normal and thermal visual detection. Additionally, plastic moldings are used in military equipment to reduce weight, improve user agility, and enhance safety, further contributing to the stealth capabilities of military personnel.
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Plastic is used in military equipment to improve flexibility and durability
Plastic is an essential material for military equipment and vehicles. Its unique characteristics, such as flexibility and durability, offer significant advantages over traditional metals in military applications.
One of the critical benefits of using plastic in military equipment is its lightweight nature. By transitioning from metal to plastic components, the weight of military gear can be reduced by up to 50%, enhancing the agility and manoeuvrability of service members during combat or tactical operations. This weight reduction also translates to significant fuel savings, which is crucial for the military, considering it is the world's largest consumer of oil, using more than 340,000 barrels per day. Lighter aircraft and vehicles can reduce fuel consumption, leading to cost savings and improved operational efficiency.
Plastics also offer improved durability and resistance compared to metals. Modern plastics are highly resistant to heat, chemicals, moisture, and impact. For instance, HDPE (high-density polyethylene) is recognised for its toughness, chemical resistance, and flexibility. This versatility allows HDPE to be used in various military applications, from liquid storage containers to vehicle components.
The use of plastic in military equipment also provides stealth capabilities. Flexible, polymer matrix-based coatings are applied to military vehicles and aircraft to avoid visual detection, both in normal and thermal imaging conditions. Additionally, plastics can be easily customised to specific colour requirements, such as matte finishes to reduce glare or camouflage patterns for enhanced stealth.
Furthermore, plastics enable innovative approaches to soldier protection. For instance, a colloid blend of silica nanoparticles and polyethylene glycol (PEG) is being explored as a type of "passive and intelligent" body armour. This blend combines the toughness of silica with the flexibility and intelligence of PEG, which can sense and respond to various environmental stimuli, enhancing soldier safety.
The versatility and adaptability of plastics make them invaluable in military equipment design, offering improved flexibility, durability, and performance compared to traditional materials.
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Plastic resins offer short lead times for product readiness
The US Army has been recycling plastics to repair military equipment. Soldiers are encouraged to collect discarded plastic items like water bottles and milk jugs, which can then be used as feedstock for 3D printers to create tools, parts, and other gadgets. This technology allows soldiers to rapidly develop the tools they need to keep up with ever-changing enemy tactics and technology.
Plastic resins are essential in creating plastic products. The correct resin grade can make or break an application. Commodity resins, for instance, are a budget-friendly option for customers, as they are typically produced at high volume and low cost for common disposable items and durable goods where mechanical properties are not critical. Polypropylene (PP), Polyethylene (PE), and Polystyrene (PS) are examples of commodity resins with desirable qualities like easy processability, corrosion resistance, and fast cycle time.
Manufacturers can ensure short lead times for product readiness by selecting the appropriate resin grade for their application. For instance, A-Pac Manufacturing is known for delivering some of the shortest lead times in the industry, maintaining their record despite the recent resin shortage. This was due to a halt in production by China, the world's largest supplier of resin, as well as increased global demand for packaging materials. Larger manufacturers are also investing in new technology and reducing waste on production lines to improve efficiency and meet demand.
The resin crisis has impacted the plastic parts supply chain, causing tight supplies, high prices, and delivery delays. However, some companies have adapted by reevaluating their supplier relationships and ensuring they have multiple sources. This ensures that they are not left stranded due to unforeseen circumstances that may affect resin supply, such as natural disasters or market instabilities.
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Recycling plastic waste reduces environmental destruction
Plastic is an incredibly versatile material, used in a wide range of applications, from automobiles to electronics, packaging, and healthcare. However, our growing reliance on plastic has resulted in increased global production and consumption, leading to an unprecedented amount of plastic waste. According to the OECD, the world produced over 460 million metric tons of plastic in 2019, double the amount produced in 2000. This waste is accumulating in our environment, with common plastic items such as cigarette butts, food wrappers, bottles, and bags littering our planet.
Recycling plastic waste is a crucial step towards reducing environmental destruction caused by plastic pollution. By reprocessing plastic waste, we can significantly reduce fossil fuel utilization, power consumption, and the need for landfilling. This, in turn, leads to a decrease in greenhouse gas emissions and lowers our carbon footprint. Reprocessing plastic waste also contributes to the global economy and creates direct jobs. For example, the US Marine Corps is now collaborating with research specialists to build a mobile recycling trailer for soldiers to fabricate 3D printing filaments from plastic waste.
However, it is important to note that recycling plastic waste also has its challenges and potential negative impacts. Existing recycling facilities have been identified as potential hotspots for toxic and hazardous waste, and the release of chemicals and particles during the recycling process can have unintended environmental and health costs. Additionally, mechanical recycling can result in the release of microplastics, which are tiny plastic particles that can end up in our water, on farmland, and inside the bodies of wildlife and humans.
To address these challenges, it is essential to prioritize a reduction in plastic production and consumption and explore alternative sustainable materials. Policies and government frameworks, such as the Global Plastics Treaty, can also play a crucial role in reducing plastic waste and improving plastic recyclability. Individual actions, such as avoiding single-use plastics and bottled water, can also make a significant collective impact in reducing plastic waste.
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Frequently asked questions
Plastics can provide troops with flexibility, durability, and comfort. Plastics can also ensure the safety of troops on the front lines by protecting them from explosions and other dangers. Plastic resins can also help upgrade stealth functions for military operations.
Plastics can leave heat source footprints that other forces may see. Plastic waste can also accumulate in the environment, leading to the widespread presence of microplastics.
Reducing plastic use, recycling or composting, and supporting policies and government frameworks that reduce single-use plastics are some ways to reduce plastic waste.
The US Marine Corps and research specialists are collaborating to build a mobile recycling trailer for soldiers to fabricate 3D printing filaments from plastic waste.
