HDPE Sheet (High Density Polyethylene Sheet) is a thermoplastic sheet based on high-density polyethylene (HDPE) resin, which is formed by extrusion or molding. High-density polyethylene is a linear polymer material formed by the polymerization of ethylene monomers under low pressure. Its molecular chains are tightly arranged and have a high degree of crystallinity (usually 60%-85%), giving the material excellent rigidity, chemical resistance and wear resistance. The surface of HDPE sheet is smooth and flat (the rough surface can be customized according to needs to enhance the anti-slip property). The thickness range is usually 2mm to 50mm, and the length and width can be customized according to needs. According to different uses, HDPE sheets can be divided into ordinary grade, wear-resistant grade (adding carbon black or glass fiber reinforcement), anti-static grade (surface resistivity 10⁶-10⁹Ω), food grade (compliant with FDA standards), low temperature resistant grade (brittle temperature -70℃) and UV protection grade (anti-UV agent added to the surface) and other types. They are widely used in chemical storage tanks, mechanical protection, food processing and environmental protection engineering.
Product Advantages
Excellent chemical corrosion resistance and long life
HDPE sheets are "immune" to most acids, alkalis, salts and organic solvents. They can replace metals or fiberglass in the fields of chemical industry and environmental protection to avoid leakage or structural failure caused by corrosion. For example, in the acid and alkali tank lining of the electroplating plant, HDPE sheets can resist the corrosion of strong acids (such as hydrochloric acid and sulfuric acid) and strong alkalis (such as sodium hydroxide), and the service life exceeds 10 years; in the sludge pool or septic tank of the sewage treatment plant, HDPE sheets can withstand high-concentration organic wastewater and microbial corrosion, avoiding the leakage problem of traditional concrete structures. Its environmental stress cracking resistance (ESCR>1000 hours) further extends the service life of the material under complex working conditions and significantly reduces maintenance and replacement costs.
Super wear resistance and low maintenance requirements
The wear rate of HDPE sheets is only 1/10 of that of ordinary plastics (such as PP and PVC), and is even better than some metal materials (such as aluminum). In high-friction scenarios such as mines, power plants, and ports, HDPE liners or guide rails can withstand the continuous friction of ore, coal, and sand, with an average annual surface wear of less than 0.1mm, greatly reducing the frequency of equipment shutdown maintenance. For example, in the conveyor belt system, after the HDPE guide rail replaces the metal guide rail, the friction coefficient is reduced by 50% (from 0.3 to 0.15), which not only reduces belt wear, but also reduces energy consumption; in the lining application of mine crushers, HDPE sheets can withstand ore impact and friction, and the service life is 3-5 times that of metal liners. Replacement does not require shutdown welding, and can be completed by direct hoisting, which significantly improves production efficiency.
Wide temperature range adaptability and energy saving and environmental protection
The brittle temperature of HDPE sheets is as low as -70℃, which can maintain flexibility and strength in extremely cold environments (such as Arctic research stations and northern winter storage tanks) to avoid low-temperature brittle cracking; the upper limit of long-term use temperature is 80℃ (short-term tolerance 100℃), which meets the needs of most industrial and civil scenarios. Its low thermal conductivity (0.45W/m·K) makes it an ideal insulation material, and it is widely used in cold storage, refrigerated trucks, pipeline insulation and other fields. For example, in food cold chain transportation, HDPE lining replaces traditional foam board, which not only improves the thermal insulation performance by 30%, but also avoids the fragility and pollution of foam board; in chemical pipeline insulation sleeves, HDPE board is lightweight (only 1/7 of steel pipe), which reduces the difficulty of installation and reduces heat loss (energy saving rate>15%), which is in line with the development trend of green and low-carbon.
Environmental protection and non-toxicity and sustainability throughout the life cycle
The production process of HDPE board does not emit harmful substances (in compliance with RoHS and REACH environmental standards), and it can be 100% recycled and reused. Waste board can be made into recycled board by washing, crushing and re-extrusion, and the recycling rate is>90%. Its non-toxicity (in compliance with FDA and EU 10/2011 standards) allows it to directly contact food, drinking water or medicine, and is widely used in food processing plants, pharmaceutical factories, hospitals and other places with extremely high hygiene requirements. For example, in the lining of milk tanks in dairy factories, HDPE sheets are non-toxic and odorless, and will not migrate harmful substances to dairy products; in temporary storage boxes for medical waste, HDPE sheets are resistant to chemical corrosion and easy to clean and disinfect, avoiding the risk of cross-contamination. From the perspective of the entire life cycle, the carbon emissions of the "production-use-recycling" process of HDPE sheets are only 1/3 of those of metal materials, making them an ideal material choice for sustainable development.
Economic efficiency and multifunctional design flexibility
HDPE sheets have low raw material costs (only 1/10 of stainless steel and 1/5 of aluminum alloy), high processing efficiency (cutting and welding speeds are 3-5 times faster than metal), and significant comprehensive cost advantages. Its versatility can be achieved through blending modification: adding carbon black can improve UV resistance (for outdoor storage tanks); adding glass fiber (GF content 10%-30%) can enhance rigidity (bending strength increased by more than 50%) and replace some metal materials; surface roughening treatment (such as sandblasting, embossing) can enhance anti-slip properties (friction coefficient > 0.6), suitable for platform pedals, ship decks and other scenes. For example, in shipbuilding, HDPE anti-slip decks replace traditional wooden or steel decks, which not only reduces weight by 60% (reducing ship fuel consumption), but also avoids wood rot and metal rust problems, reducing maintenance costs by more than 80%.
