200*50mm Industrial PU Caster Wheel mm for Hand Truck

High quality pu wheel with aluminum center 200*50 mm1.Wheel:pu
2.Rim: Aluminum
3.Colour: Yellow and brown
4.Hardness:93A
5.Diameter:200mm
6.Bearing: 6204ZZ
7.Packing: Paper box,wodden box
ADVANTAGE:
1. any hardness can be made.
2.hight load capacity.
3. good bonding for pu with wheel center.
4. any color can be made.
5. low rolling resistance,elastic abrasion resistant.
6. any quality pu can be made.SHIPPING & DELIVERY DATE:
1. 30%T/T deposit and 70% T/T upon copy of B/L.
2. 25-30days after received the 30% deposit.PROMISE:
1. good bonding for every product.
2. all of our product are backed by a one year guarantee.Q:What Is Polyurethane?A: Polyurethane is a synthetic material that is used in various applications in nearly every field imaginable. It is renowned for its durability and flexibility and can be produced in a number of different forms based on what it will be used for. Everything from airplane wings to tires can be made with polyurethane.
· Q: Polyurethane IdentificationA: Polyurethane is identified as a polymer, which is basically a string of smaller molecules known as monomers. In this case, it is a string of urethane. An entire polyurethane chain consists of nitrogen, carbon and oxygen atoms double-bonded to a hydroxyl group, which is also known as an alcohol and is a bonded molecule of oxygen and hydrogen. When various other elements are added to this basic chain, the polyurethane changes, sometimes becoming a rubbery solid, liquid or even a foam.Q: Polyurethane Features
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A: For the most part, polyurethane is not a dangerous substance--which is why there is no limit on exposure to it. However, there are times where it can let off harmful chemicals, including carbon monoxide and other hazardous fumes. This is generally when polyurethane is heated to over 200 degrees C. For this reason, handling this polymer at high temperatures should be done with gloves and a personal breathing apparatus.Q:Polyurethane Benefits
A: One of the major benefits of polyurethane is its resistance to heat and flames. Using the substance means that it will offer protection from this, which makes it particularly beneficial in the home and in making important substances and materials. It is often used as a coat for wood, plastic or other substances because of this protective property.