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Advantages of polyurethane casters
Views：781 Updated：2021-12-04
1. Why are there polyurethane wheels for casters? Polyurethane is commonly known as Youli Glue, Spring Glue, and the full name is polyurethane or isocyanate polymer. Casting polyurethane is a kind of polyurethane elastomer that is injected by chemical reaction, based on polyester polyol, diisoester and ethylene glycol. Protect the floor, absorb vibration, no trace, no staining, very abrasion-resistant, elastic and resistant. It is an elastomer between plastic and rubber, and its excellent comprehensive properties are not available in ordinary plastics and rubbers.
1. Characteristics of polyurethane wheels The elastomer of polyurethane wheels has good performances such as wear resistance, chemical resistance, high strength, high elasticity, low pressure resistance, strong shock absorption, tear resistance, radiation resistance, high load-bearing capacity and shock absorption. Polyurethane wheels also have a wide range of hardness, from Shore A10-100. There are already products on the market that surpass Shaw A100 and above. In addition, the polyurethane wheels have excellent sound absorption characteristics, and the wheels do not produce noise during the movement, which can achieve a mute effect. These characteristics of PU wheels are very suitable as caster materials.
2. Polyurethane wheels can adopt a variety of processing methods
(1) Polyurethane wheels can be molded by injection, extrusion, calendering, blow molding and other processes like ordinary plastics (referring to CPU);
(2) Polyurethane wheel elastomers can also be molded by plasticizing, mixing, and vulcanizing processes like general rubber (referring to MPU);
(3) Polyurethane wheels can also be made into liquid rubber, which can be molded by injection molding, spraying, potting, and centrifugal molding (referring to CPU).
What are the advantages of polyurethane plastics?
Polyurethane plastic is widely used in casters. It is a lightweight, impact-resistant, abrasion-resistant, and corrosion-resistant thermoplastic polyurethane elastomer manufactured by a casting-type production process.
Why did you choose this material? Because it has some unique characteristics:
1. Good abrasion resistance, 5-8 times that of nitrile rubber;
2. Good bending strength and elasticity;
3. Large tensile strength and elongation at break
4. Strong tear resistance;
5. Moderate temperature resistance (-50℃~85℃) up to 120℃;
6. Good oil resistance, water resistance, mildew resistance, and solvent resistance;
7. Good aging resistance
8. Large adjustable range of hardness (Shore 15A~98A);
9. Low compression set rate;
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