Preamble

Application of Intelligent Impact-Resistant Materials in the Field of Military Packaging
Shenzhen Andy Supercore New Material Co., Ltd., Shenzhen

Abstract

Military packaging plays a vital role in military equipment support, logistics, and the informatization of the modern battlefield. With the ongoing modernization of China's military equipment, there is an increasingly urgent demand for advanced, adaptable, diverse, and durable packaging materials. Traditional foam materials can no longer meet the rigorous requirements for the protection of equipment and supplies in modern warfare.

Compared to traditional foam materials, EUDE FOAM—a non-Newtonian fluid-like material—exhibits exceptional impact resistance and adaptive performance. Through functional design of the molecular structure, functionalized modification of the polymer cross-linked network, and optimization of the macroscopic structure, EUDE FOAM can be tailored to specific application scenarios. It offers additional functionalities such as anti-static properties, salt spray corrosion resistance, anti-fungal properties, flame retardancy, electromagnetic shielding, puncture resistance, and waterproof breathability. Currently, EUDE FOAM has been applied to high-performance impact-resistant missile protective casings, providing comprehensive protection for high-value, high-precision missiles. As modern military equipment becomes increasingly precise, electronic, and intelligent, EUDE FOAM holds broad application prospects in the fields of military packaging and protection.

1 Introduction

The packaging of military supplies is an essential component of military equipment support and infrastructure. The quality of protective packaging significantly impacts the storage, transportation, and ultimate deployment of military equipment. Excellent protection ensures that equipment maintains its quality and performance throughout its intended storage life and transport cycles, thereby increasing operational reliability and playing a critical role in securing victory in battles and campaigns. Military packaging differs from civilian packaging in that modern military equipment faces greater environmental uncertainty during storage, transport, and use. Given China's vast territory and significant climatic variations, packaging materials must possess a wide range of environmental adaptability, maintaining protective performance across extremes of temperature, precipitation, salinity, and humidity.

Furthermore, the distribution of military equipment is strategically determined, meaning storage and usage environments are often unpredictable. During long-term storage, equipment is susceptible to damage from temperature fluctuations, humidity, and salt spray. These factors can lead to the corrosion of metal components, insulation failure in electronic devices, aging of plastic and rubber products, fogging or mold growth on optical instruments, and the rotting of cotton textiles, all of which reduce the reliability of military supplies. As military strike capabilities and sabotage methods become increasingly diverse, and as the battlefield environment for high-tech, high-value equipment becomes more severe, traditional single-function protective packaging is no longer sufficient.

Modern requirements demand integrated protective functions, including electromagnetic shielding, radiation protection, shock resistance, moisture proofing, and anti-fungal properties. Advanced packaging designs must improve the protection of supplies in high-temperature and high-humidity zones, enhancing their ability to withstand harsh maritime climates characterized by rain, fog, and high salinity. As modern military detection and weapon strike capabilities evolve, packaging must also account for new environmental factors such as vibration, high-energy impact, and radiation. The development of new materials—including photochemical functional materials, stealth materials, conductive materials, and anti-static cushioning materials—provides the technical foundation for achieving this comprehensive protective packaging.

2 Current Status and Trends of Military Packaging

With the modernization of military equipment and the increased emphasis on military logistics, particularly the growth of strategic reserves in recent years, protective packaging has received significant attention. Chinese military packaging has evolved from traditional methods such as oil sealing, wax sealing, and wooden crates to the application of advanced modern materials and technologies. This transition has significantly extended the storage life of equipment, reduced maintenance requirements, and increased storage reliability. However, it must be recognized that China's military packaging industry started late, and a clear gap remains compared to developed Western nations. To rapidly improve technical levels and meet development needs, we must identify global trends and align with advanced international standards to accelerate progress.

2.1 Full Life-Cycle Protection

In line with modern logistics improvements, the concept of full life-cycle military packaging design was proposed. This approach requires comprehensive consideration of the entire process—from packaging production to the final deployment of weapon systems—encompassing packaging, handling, transportation, storage, and use. This means supplies must face more complex environments and diverse application scenarios. Consequently, there is a higher demand not only for individual protective metrics but also for multi-functional and integrated performance. Traditional materials struggle to meet these requirements, necessitating the development of new composite packaging materials.

2.2 Precision and Electronification of Military Equipment

Modern warfare is characterized by increasingly sophisticated, precise, and complex weapon systems. High-tech platforms, electronic weapon systems, and new equipment types are emerging as integrated complexes of advanced technology. These systems are expensive, composed of complex materials, and require strict protection standards. Therefore, the chosen packaging structures and sealing methods must align with the specific physical and chemical characteristics of the equipment. Military packaging is a vital link in ensuring high reliability, long service life, and the rapid conversion of equipment into combat effectiveness during wartime.

2.3 Adaptation to the Informatized Battlefield

In recent years, military packaging has moved toward high-tech and informatized solutions. Modern warfare is characterized by high technology, high speed, high intensity, and high consumption. The sudden outbreak of conflict, vast battlefield space, and diverse strike methods—particularly satellite reconnaissance, precision guidance, and electromagnetic warfare—make the informatized battlefield unprecedentedly transparent. In this environment, "to be discovered is to be destroyed." Therefore, packaging design must go beyond traditional protection against climate and road conditions; it must also innovate to counter new reconnaissance and strike technologies, enhancing the survivability of supplies under informatized conditions.

2.4 Diversified Military Tasks

In the new historical period, the military is tasked not only with traditional combat readiness but also with non-war military operations such as emergency response, counter-terrorism, stability maintenance, and disaster relief. These tasks are often characterized by sudden onset, complex conditions, and poor infrastructure. Consequently, military packaging must be designed to be lightweight, integrated, intelligent, and flexible to support these diverse missions. The focus has shifted from simple rust and moisture prevention during storage to comprehensive protection against shock and impact during transport and active use.

2.5 Systematic Protection Scenarios

In storage, equipment may be affected by temperature, humidity, pressure, pollutants, mold, pests, static electricity, and radiation, leading to corrosion, aging, or functional failure. In transport and operational environments, equipment faces even harsher conditions, including acoustic waves, shock waves, sand, dust, and electromagnetic interference. Any weakness in the packaging chain can significantly compromise overall protection. Therefore, packaging design must integrate all protective elements to ensure the total protective function is greater than the sum of its parts. While significant progress has been made in storage protection, the increasing sensitivity of electronic and precision equipment to vibration and impact during transport and deployment makes high-performance impact-resistant materials a primary direction for future development.

3 Impact-Resistant Packaging

Impact-resistant packaging absorbs or mitigates the shocks and vibrations generated during handling, transport, and use—such as drops, collisions, explosions, and vehicle turbulence—preventing material damage, structural failure, or functional loss caused by overload or fatigue. Traditional materials, such as bubble wrap and EPE foam, rely on their structural characteristics (high-density air cells acting as cushions) to slow down impacts. However, in the increasingly harsh military environment, the intensity of vibration and shock far exceeds civilian scenarios. Traditional materials often require excessive thickness and volume to provide adequate protection, which creates logistical burdens. Thus, advanced materials are required.

3.1 EUDE FOAM

Intelligent impact-resistant materials, specifically non-Newtonian fluid-based materials, are a new class of functional polymers. Their energy absorption mechanism relies not only on structural cushioning but also on molecular-level friction and collisions. This unique structure significantly enhances impact resistance. High-performance impact-resistant materials are often represented by the emergence of $D3O$.

$D3O$, invented by British engineer Richard Palmer, is a material composed of chemically combined polymers that exhibits two mechanical states (soft and hard) under different gravitational impacts. While $D3O$ has been widely used in professional sports and military fields, its core technology has long been controlled by foreign manufacturers. Our company has developed EUDE FOAM, a high-performance impact-resistant material with independent intellectual property rights. Unlike the gel-like structure of $D3O$, EUDE FOAM utilizes a functional polymer as the main body, forming a spatially cross-linked network. Impact-resistant intelligent small molecules are uniformly distributed within this network. This structure results in lower density, higher flexibility, and easier processing. Its high designability allows for customization across various scenarios.

3.2 Mechanism of Impact Resistance

Unlike traditional materials, when EUDE FOAM is subjected to an external force, its closed-cell structure provides initial cushioning. Simultaneously, the small molecules distributed within the material respond rapidly to the impact, aggregating to produce a "dilatancy" phase transition. This causes the material to harden instantly. During this phase transition, a massive amount of energy is absorbed through structural transformation and molecular friction. Once the impact ends, the material recovers its shape, the small molecules return to a dispersed state, and the material becomes soft again, as shown in [FIGURE:N]. Because energy absorption occurs at the microscopic level, the performance is stable and reliable.

EUDE FOAM's unique structure allows it to "recognize" and respond to external impacts. Under normal conditions, it maintains the stability, chemical resistance, and flexibility of a standard polymer, offering low compression set, thermal insulation, and acoustic damping. Upon impact, the microscopic rearrangement provides high hardness and high energy absorption. As shown in [TABLE:N], its impact resistance is significantly higher than traditional materials like EPE, while remaining lightweight, waterproof, and resistant to salt spray.

Compared to polyethylene (PE) foam, ethylene-vinyl acetate (EVA) foam, polyurethane (PU) foam, memory foam, and silicone of the same thickness, EUDE FOAM significantly reduces the penetration force under a $20\text{ J}$ drop-weight impact, demonstrating superior energy absorption (see [FIGURE:N]).

3.3 Application Examples and Performance Testing

Although China's military packaging has progressed, a gap remains compared to Western standards. For instance, U.S. military ammunition packaging must remain safe for firing after two drops from a height of $2.1\text{ m}$, whereas Chinese standards often require separate storage for ammunition dropped from $1.5\text{ m}$. Using EUDE FOAM, we have designed and manufactured missile protective casings (see [FIGURE:N]) that meet advanced international standards for shock absorption, moisture resistance, and corrosion resistance.

Furthermore, EUDE FOAM's excellent mechanical processing properties allow for the creation of composite materials through coating, filling, grafting, and bonding. This enables the development of specialized products that are anti-puncture, anti-static, flame retardant, and electromagnetic shielding, broadening the material's application in complex military environments.

4 Conclusion and Outlook

The current conflict in Ukraine highlights the decisive role of modern weapon systems. Precision strikes by anti-tank missiles and loitering munitions have redefined the battlefield. Reports indicating high kill rates for systems like the Javelin missile underscore the trend toward high-tech, precise, and informatized warfare. The evolution of military equipment necessitates rapid advancements in packaging materials, particularly for ammunition. The superior performance of EUDE FOAM aligns perfectly with these trends. We anticipate its widespread adoption in the military sector and look forward to collaborating with various parties to develop integrated protective materials that further the development of China's military packaging technology.