Outstanding advantages of polyurethane caster
1, the function of adjustable scale. A number of physical and mechanical functional objectives can be changed in a certain scale through the selection of the original data and the adjustment of the formula, and then meet the user's different requirements for the product function. For example, hardness is often an important target of products for users. Polyurethane wheel elastomer can be made into soft printing cots with A hardness of about 20 and hard steel cots with A hardness of 70 or more, which is usually difficult to achieve with elastomer data. Polyurethane elastomer is a polar polymer composed of many flexible segments and rigid segments. With the improvement of the proportion of rigid segments and the increase of the density of polar groups, the strength and hardness of elastomer will be improved accordingly.
2. Superior wear resistance. Especially in the presence of water, oil and other moist medium operating conditions, its wear resistance is usually general rubber data several times to dozens of times. Metal materials such as steel, although is relatively strong, but it will and must be the most wear-resisting, such as the Yellow River irrigated area of large water pump, the flow components metal mouth ring and maintenance by a lot of sediment flushing, in less than a few hundred hours serious wear and tear is leaking, and choose the mouth of the polyurethane elastomer coated rings and maintenance operation successively in 1800 small into still not wear. Other polyurethane elastomers such as rubber roller for rice hulling, vibrating screen for coal dressing, track track for track and field, dynamic oil sealing ring for crane and forklift, elevator wheel and roller skates, etc. It should be mentioned that to improve the friction coefficient of middle and low hardness polyurethane elastomers and wear resistance under load, a few lubricants such as aluminum disulfide, graphite or silicone oil can be added to such polyurethane elastomers.
3. Various processing methods are widely applicable. Polyurethane elastomers can not only be shaped by plastic refining, mixing and vulcanization technology as general rubber. At the same time, it can also be made into liquid rubber, pouring molding or spraying, pouring and sealing, centrifugal molding; Still can make granule material, same as general plastic, with injection, extrusion, calendering, blow molding technology. Molding or injection molding parts, in a certain scale of hardness, can also be cut, grinding, drilling and other mechanical processing. Due to the diversity of processing, polyurethane elastomers have a wide range of applicability and application scope.
4. Oil resistance, ozone resistance, aging resistance, radiation resistance, low temperature resistance, good sound transmission, strong adhesion, excellent biocompatibility and blood compatibility. These advantages are the reason why polyurethane elastomers are widely used in military industry, aerospace, acoustics, biology and other fields
