pu foam tire and pu foam auto part
pu foam tires & pu foam auto parts & pu foam seat & pu-foam armrst
One of Top Marker specialized in filed of pu products --- skin, foamed or hi-rebound. parts for walkers, wheelchairs, fitness & health enquipments.
YuTai Co.,Ltd. are the professional manufacturer in pu various products as pu foam tire & pu foam auto part & pu foam seat & pu foam medical armrest & wheelchair with pu foam tires. We have a long history and a lot of experiences in supplying top quality to the world, especially to the markets of USA, Europe, Australia, and Japan.
One of Top Marker specialized in filed of pu products include skin, foamed or hi-rebound. parts for walkers, wheelchairs, fitness & health enquipments.
tires are as old as the modern wheelchair, itself. But, as
mobility technology flourished over the past three decades, flat-free
tire technology equally evolved, dramatically broadening the definition,
construction, and performance of flat free tires. Whereas
flat-free once meant a solid rubber tire, today' definition can range
from a foam filling to a poly urethane tread to a rubber insert, and
it's important for the consumer to understand which construction and
material best meets his or her performance needs.
On today's powerchairs, foam-filled tires, especially on the drive wheels, are the most popular flat-free solution. The foam-filled process uses a standard pneumatic tire - minus the tube - and via a mold-in process, fills the tire's cavity with foam, replicating a fully inflated tire. The foam may vary in density depending on the required weight capacity, but most equate to a ride similar to the maximum PSI rating of the tire -- that is, foam-filled tires provide a somewhat firm ride. Because foam-filled tires compare to a forever-inflated tire, a split-rim is required for installation (forget using a flat-head screwdriver to pry these tires on a one-piece rim!). The foremost benefits of foam-filled tires are that you receive the same optimal tread as a rubber pneumatic tire, and because foam-filled tires bead properly, they won't roll off the rim in high-speed, high-stress applications. The lifespan of foam-filled tires equals that of a properly maintained pneumatic tire.
Wheelchair Junkie Tip #16,738: If you're storing a powerchair or scooter with foam-filled tires for a prolonged period, place it on blocks, with the tires approximately ?quot; to 1" off the ground, preventing flat spots on the tires from sitting stationary.
Poly Urethane (PU)
PU tires are the most common flat-free tire on manual wheelchairs, used on both rear wheels and casters. PU tires are a highly-resilient, one-piece molding that's fairly lightweight. PU tires come in a variety of tread patterns, with molded air pockets to soften the ride characteristics. With such a resiliency, PU tires may pry onto a one-piece rim, with a secure bead (they're typically flawless on manual chairs, but may roll off the rim on a high-speed rear-wheel-drive powerchair caster). The lifespan of a PU tire is often three or four times that of a traditional rubber tire, never needing replacement in some cases.
Co-molded tires are most commonly found via powerchair casters and low-end manual wheelchair wheels, where a plastic rim and molded-type tire are permanently bonded as a single unit. Co-molded tires are especially useful as anti-tip wheels, where durability is more important than ride characteristics. A version of this genre is the solid over-molded foam caster - most common in 8" casters on mid-range powerchairs - which offers durability with an enhanced ride characteristic. Co-molded tires have an exceptional lifespan, but the entire wheel assembly requires replacement when worn.
Solid inserts were the predecessor to foam-filled tires, filling the void within a pneumatic tire, and allow use on one-piece rims (a special tool is required for installation on one-piece rims). Because solid inserts are. . . well. . . solid - or, solid rubber - they add considerable weight to the tire, decreasing performance in manual wheelchairs. On powerchairs, solid inserts may degrade quite rapidly, leaving you with somewhat flat, flat-free tires (because the inserts float between the rim and tire, high-weight and torque applications can stretch and twist the inserts). On manual wheelchairs, however, solid inserts allow the use of a standard pneumatic rubber tire, offering improved traction over a PU tire.
Semi-pneumatic tires and inserts feature molded-in air pockets, much like the air pockets in the soles of athletic shoes, providing a slightly cushioned ride. Found in forms ranging from poly urethane tires to inserts, semi-pneumatic tires never need air maintenance, nor will they become flat when punctured, making them truly flat-free. The important distinction, however, is that while all semi-pneumatic tires are flat-free, not all flat-free tires are semi-pneumatic, as with solid rubber tires.
Indeed, who knew there were so many factors and choices in merely wishing a flat-free tire? But, by selecting the right tire for the right application, you can stroll the boulevard, ensured that your chair is both flat-free and trouble free.