How do low-pressure case bags, made with high-performance PE materials, safeguard goods during logistics and transportation?
Publish Time: 2025-11-17
In modern efficient logistics and intelligent warehousing systems, packaging is not only the "outer garment" of a product but also a crucial barrier ensuring the stable operation of the supply chain. Low-pressure case bags (also known as low-pressure sleeve bags), specifically designed for frame structures, metal components, electronic equipment, and precision instruments, are made from high-quality low-density polyethylene (LDPE) raw materials and integrally molded using advanced blow molding technology. With their superior flexibility, tear resistance, sealing performance, and environmental protection capabilities, they have become an indispensable part of industrial-grade packaging solutions, effectively resisting multiple risks during transportation and storage, and significantly reducing damage rates and after-sales costs.The core advantages of low-pressure case bags lie first and foremost in the high-performance characteristics of the material itself. Using high-purity, impurity-free food-grade or industrial-grade LDPE resin, the highly branched molecular chain structure gives the film excellent ductility and impact resistance. Even in low-temperature environments (-30℃), it remains soft and non-brittle; when faced with sharp edges or sudden compression, it can absorb energy through deformation and is not easily perforated or torn. Its elongation at break can reach over 500%, far exceeding that of ordinary PE bags, ensuring continuous and reliable protection in complex loading and unloading scenarios.The low-pressure case bags' blow molding process guarantees uniform thickness and structural integrity. Through precise control of extrusion temperature, air cooling rate, and traction tension, the inner liner bag wall thickness tolerance is controlled within ±5%, resulting in no crystal points, no bubbles, and no seams, achieving 360° seamless wrapping. This integrated cylindrical structure can closely conform to the contours of shelves, pallets, steel frames, or irregularly shaped equipment, forming a "second skin" of protection, effectively isolating external dust, moisture, oil, and minor chemical splashes. Some high-end models also add antistatic masterbatch to prevent damage to electronic components due to electrostatic adsorption.The load-bearing and abrasion-resistant performance meets stringent logistics requirements. The standard thickness range is 0.08–0.20mm, and can be customized according to cargo weight and transportation distance; laboratory tests show that a single bag can withstand a static load of over 20kg, and dynamic drop tests show no significant scratches or deformation to the internal frame. With a smooth, dense surface and low coefficient of friction, it reduces scratches and damage during forklift handling or multi-layer stacking, while also facilitating high-speed bagging operations on automated packaging lines.Its environmental and economic advantages are equally prominent. LDPE material is 100% recyclable and complies with RoHS and REACH environmental directives; the production process has low energy consumption and no wastewater discharge; its lightweight design reduces the carbon footprint of transportation. Compared to cardboard boxes with foam filling or wooden crates, low-pressure case bags save over 70% of storage space, require no disassembly, and are ready to use immediately, significantly improving warehouse turnover efficiency. In industries with high-volume shipments, such as automotive parts, home appliances, building materials, and photovoltaic brackets, it has widely replaced traditional packaging solutions.Ultimately, the value of low-pressure case bags lies not only in "wrapping goods," but also in its flexible structure, which forms an invisible protective barrier between steel and precision components. When a batch of precision molds arrives safely after traveling thousands of miles, or when an entire truckload of metal components remains spotless during rainy season storage, it is this seemingly simple PE case bag that silently fulfills its mission. In today's supply chain, which strives for resilience, greenness, and intelligence, high-performance low-pressure case bags are leveraging materials science to continuously solidify the quality foundation of modern logistics.
