Why can PE-LD become a tough choice among modern packaging materials?
Publish Time: 2025-06-18
In today's society, with the rapid development of logistics, warehousing, retail and other industries, the requirements for packaging materials are also increasing. As a core raw material widely used in various packaging bags, PE-LD stands out among many plastic materials with its excellent physical properties and economy. It not only has excellent tensile resistance, waterproofness, high-strength edge sealing, and strong load-bearing capacity, but also combines the characteristics of strong glue suitable for all seasons, making it an indispensable and important material in the field of modern packaging.
PE-LD (PE) is a thermoplastic resin polymerized from ethylene monomers. According to different densities and structures, it can be divided into low-density PE-LD (LDPE), high-density PE-LD (HDPE) and ultra-high molecular weight PE-LD (UHMWPE). Different types of PE-LD are suitable for different application scenarios, but they all have one common feature-extremely high toughness and durability. After professional tensile testing, bags made of PE-LD showed super strong anti-pulling ability, and it is not easy to break even if torn by external force, which is very suitable for products that need to withstand certain mechanical stress during transportation and storage.
In addition to mechanical strength, PE-LD materials also have good waterproof properties. Due to its tight molecular structure and non-water absorption, PE-LD bags show excellent sealing and anti-leakage ability in water injection tests. This feature makes it widely used in food packaging, pharmaceutical products, electronic products, outdoor products and other fields, which can effectively prevent moisture intrusion and cause moisture or damage to the contents. Whether in humid environments or rainy transportation, PE-LD packaging can provide reliable protection for internal items.
In terms of manufacturing technology, PE-LD bags are usually sealed with heat sealing technology, which makes the edge parts have high bonding strength. The edge sealing test shows that high-quality PE-LD bags can withstand large tearing forces without cracking, further improving the stability of the overall structure. In addition, many high-end PE-LD bags are also equipped with four-season strong glue at the opening. This adhesive can achieve firm bonding at room temperature. Once bonded, it is not easy to tear, ensuring the safety of the contents without leakage. It is especially suitable for express delivery, document packaging, gift packaging and other scenes with high requirements for sealing.
In terms of load-bearing capacity, PE-LD bags also perform well. Bags made of high-density PE-LD can carry heavier items, such as hardware accessories, building materials, industrial parts, etc., without breaking or deformation. This strong load-bearing property also makes PE-LD bags the preferred material for supermarket shopping bags, garbage bags, logistics packaging bags and other products.
More importantly, the PE-LD material itself has good processing adaptability, and can be used to manufacture packaging products of different thicknesses, sizes and functions through film blowing, casting, injection molding and other methods to meet diversified market needs. At the same time, with the improvement of environmental awareness, more and more degradable or recyclable PE-LD products are being launched to promote the development of green packaging.
PE-LD materials have become one of the most important and commonly used materials in the modern packaging industry due to their advantages such as anti-pulling, waterproof, high-strength edge sealing, strong load-bearing capacity and four-season strong glue. Whether it is the packaging of small items in daily life or the transportation of heavy goods in the industrial field, PE-LD bags can provide stable, safe and efficient solutions. Choosing high-quality PE-LD packaging is not only a guarantee of product protection, but also a dual emphasis on user experience and environmental protection concepts.
