Development and Production of Polyurethane Caster
Jul. 10, 2020
Industry, commerce, medical equipment and machinery, logistics and transportation, environmentally friendly cleaning supplies, furniture industry, beauty equipment, food machinery, hardware production, and other industries are inseparable from casters. Now the materials of casters are mainly nylon, plastic, rubber, etc. These materials have the disadvantages of poor load-bearing capacity, resistance to acid and alkali, high noise during rotation, damage to the ground, and resistance to impact. In view of the shortcomings of the prior art, the object of the present invention is to provide a PU castor wheel, which has high mechanical strength, high bearing capacity, acid and alkali resistance, quietness during rotation, does not damage the ground, impact resistance, wear resistance Good, good fatigue resistance, hydrolysis resistance, wear resistance, waterproof, wide temperature range; the invention also provides a simple and easy to implement preparation method. Polyurethane casters are made of the following parts by weight of raw materials: of which: polyether polyol DDL-1000D is a polyether polyol with 2 functionality and a number average molecular weight of 1000. Products made with such polyols have high strength. Polyether polyol DDL-3000D is a polyether polyol with 2 functionality and a number average molecular weight of 3000. The product has high mechanical strength, good wear resistance, and fatigue resistance. The curing agent is 1,4-butanediol. It reacts with the NCO group in the prepolymer to be cured and shaped.
Pu Castor Wheels
The preparation method of polyurethane casters, the steps are as follows: The polyether polyol DDL-1000D and the polyether polyol DDL-3000D are vacuum dehydrated at 100～120℃ for 1.5～2.0h, after cooling to 45～55℃, PPDI is added, Prepolymers with NCO mass content of 5-18% are synthesized at 70～80℃, then add curing agent and mix well, then pour into the mold, release after 20～45min, vulcanize at 100～110℃ for 8～12h, Get the product. The mixing temperature is 75°C to 85°C.
PU skateboard wheels supplier believes that compared with the prior art, the beneficial effects of the present invention are as follows: (1) The compounding effect of the components of the present invention, the prepared polyurethane casters have high mechanical strength, It has the characteristics of high bearing capacity, acid and alkali resistance, quietness during rotation, no damage to the ground, impact resistance, good wear resistance, good fatigue resistance, hydrolysis resistance, wear resistance, waterproof and wide temperature range. (2) The present invention also provides its preparation method, which is simple and easy to implement. DETAILED DESCRIPTION The present invention will be further described below in conjunction with embodiments. Polyurethane casters are significantly better than other materials in terms of wear resistance, caster rolling resistance, and tear resistance.
The load capacity of polyurethane wheels of the same size is 6-7 times that of rubber wheels. The production process can be continuous and automated, and little waste is generated during production and use. More importantly, part of the carcass of the waste polyurethane casters can be recycled and used as other polyurethane products, which will not cause environmental pollution. Moreover, it is formed by liquid casting and the manufacturing process is simple. Therefore, it is known as the green environmental protection caster of the 21st century. Polyurethane wheels will be the mainstream of the development of casters in various industries in the future.