Shock Absorbing PU Integral Skin Foam Wheel Tire Assembly

Specially molded for wheelchairs, office chairs, medical carts, and industrial equipment, this polyurethane integral skin foam wheel tire assembly combines high elasticity with flat-free reliability. Unlike standard rubber or hollow plastic wheels, its dense microcellular outer skin prevents punctures, absorbs floor vibrations smoothly, and leaves no scuff marks on indoor flooring. Built with high-concentricity hub inserts, it guarantees long-term durability under continuous rolling loads.

Parameter
Features

Outer Integral Skin Foam Layer	Density 450 to 600 kg/m3, Shore A 65 to 80; Wear-resistant, scratch-proof, pressure-resistant, and non-peeling.
Internal Foam Core Layer	Density 180 to 240 kg/m3, Shore A 35 to 45; Soft, supportive, and ergonomic arm cushioning.
Overall Assembly Average Density	200 to 280 kg/m3; Semi-rigid feel balancing structural strength with tactile comfort.
Abrasion Resistance	Withstands 5000 cycles of steel wool reciprocating friction without base exposure or cracking.
Compression Permanent Set	5% or lower (Tested at 50 degrees C under constant pressure for 22 hours); Resists permanent sagging.
Tear Strength	3.5 N/mm or higher; Prevents edge tearing during flexing, installation, or torque locking.
Resilience Rate	48% or higher; Rapid spring-back recovery after arm release with zero indentations.
Flammability Rating	GB 8410-2017 and FMVSS 302 automotive interior flammability compliant.
Odor & VOC Level	Grade 3 or lower low-VOC odor rating, meeting passenger vehicle eco-standards.
Operating Temperature	-40 to 90 degrees C; Non-sticky under summer sun exposure and non-brittle in extreme winter cold.
Humid-Heat Resistance	Passes 500 hours cycle testing at 70 degrees C and 95% RH without cracking, discoloration, or mold growth.
Stain Resistance & Cleaning	Dense, non-porous skin surface prevents liquid penetration and wipes clean easily with wet towels.

Structural Layering
- Puncture-Proof & Maintenance-Free: Solid microcellular PU structure eliminates air loss, flat tires, and maintenance downtime.
- Smooth & Silent Shock Absorption: Elastic foam body dampens ground impacts smoothly without scuffing or damaging delicate indoor floors.
- High Load-Bearing Core Hub: Heavy-duty central hub configuration ensures high wear resistance and smooth rolling concentricity.
- Manufacturer Advantage: Advanced tooling for various hub dimensions, custom tread patterns, and high-volume competitive pricing.