The advantages and disadvantages of polyurethane casters

Polyurethane Caster Advantages and Disadvantages
Polyurethane (PU) casters are widely used in various applications due to their material properties, but they also have certain limitations. Their specific advantages and disadvantages are as follows:

I. Core Advantages
Weather and Corrosion Resistance: Polyurethane has excellent resistance to oils, weak acids, bases, and solvents. It can withstand the oily and humid environments of food processing plants, as well as chemical attack in industrial settings. It is also resistant to hydrolysis and cracking due to long-term contact with water, making it suitable for a wide range of applications.

Hygienic and Easy to Clean: The smooth, non-porous surface does not easily absorb dust, food debris, or dirt. Cleaning requires only a simple wipe or rinse. Some PU casters meet food-grade certifications such as FDA and EU 10/2011, meeting the hygiene requirements of the food and pharmaceutical industries.

Excellent Shock Absorption and Quieting: With excellent elasticity, they can cushion equipment vibrations during rolling, protecting precision instruments or fragile products. They also produce low friction noise, making them suitable for noise-sensitive environments such as workshops and laboratories. Balanced load-bearing and wear-resistance: At the same hardness, polyurethane casters have a superior load-bearing capacity compared to rubber casters. The wheel surface is also wear-resistant and less prone to deformation, resulting in a service life 3-5 times longer than ordinary rubber casters, reducing frequent replacement costs.

Excellent floor adaptability: The wheel surface has a moderate friction coefficient, which prevents scratches on smooth surfaces like epoxy floors and tiles, while also allowing for stable rolling on even slightly uneven surfaces without slipping or jamming.

II. Major Disadvantages
Poor high-temperature resistance: Conventional polyurethane casters typically operate between -20°C and 80°C. Prolonged exposure to high temperatures (such as near ovens) can lead to softening, deformation, and even odor, compromising safety.

Tends to harden in low-temperature environments: When temperatures fall below -20°C, the polyurethane material gradually hardens and loses its elasticity, increasing rolling resistance, reducing shock absorption, and even causing cracking in the wheel surface. This makes it unsuitable for applications such as cold storage.

Higher cost: Compared with ordinary rubber and nylon casters, the raw materials and production processes of polyurethane casters are more complicated, and the unit price is usually 30%-50% higher. For large-scale batch use scenarios, the initial procurement cost will increase.