Release time: 2020-02-07 15:53:37
Polyurethane has low thermal conductivity, good thermal insulation performance, moisture resistance, water resistance, aging resistance, temperature resistance, non-melting, etc. At the same time, polyurethane has light bulk density, can reduce the self-weight of the finished product, high cutting accuracy, and the surface of the finished product The flatness is guaranteed, and no harmful gas will be generated at high temperature. In terms of flame retardant properties, polyurethane is a thermosetting insulation material, which can reach the flame retardant performance of compound A. It does not have flame propagation when burning, and does not cause dripping. The surface will be carbonized and coked, and will self-retain from fire, which can avoid igniting Burn other flammable materials. Due to its multiple advantages, polyurethane insulation is also called the third generation of new insulation materials.
As an integrated material for building insulation and waterproofing, polyurethane rigid foam breaks the traditional single function of building materials-waterproof, non-insulating, and non-waterproof. Once the waterproof layer leaks, the insulation layer will lose its insulation function.
Elastomer environmentally friendly non-foaming polyurethane catalyst characteristics: 1. The temperature rise during the long mixing operation period is not obvious, the viscosity is small, the material fluidity is good, and it is conducive to filling the mold cavity quickly. 2. The operating time is not shortened with the increase of the amount of use Even if the amount of the elastomer environmentally friendly non-foaming polyurethane catalyst is doubled, the operating time will not be significantly shortened. 3. Post-maturation is fast. When the amount of the elastomeric environmentally friendly non-foaming polyurethane catalyst is doubled to the organic mercury, the demolding time and strength increase are basically the same as the organic mercury. 4. The catalytic selectivity is obviously hardly catalyzed by the reaction between NCO and water, and the product is transparent and free of bubbles.
Polyurethane was invented by German chemist O. Bayer in the 1930s. Due to its flexible formula, diverse product forms, and excellent product properties, polyurethane has become more and more widely used in various industries.
It should be cleaned before use, and some polyurethane pipe insulation materials should also be cleaned regularly. In order to facilitate cleaning, a filter or a purge cleaning hole is provided on the pipeline. On long-distance pipelines that transport oil and natural gas, it is necessary to periodically use a sweeper to remove the accumulated dirt in the pipe. To this end, special devices for sending and receiving sweepers are required.
Polyurethane Elastomers (PU Elastomers) Pouring Polyurethane Elastomers (referred to as CPU)-is the most widely used and most productive of polyurethane elastomers; Thermoplastic Polyurethane Elastomers (referred to as TPU)-Thermoplastic Polyurethane Elastomers The body accounts for about 25% of the total polyurethane elastomer; the kneaded polyurethane elastomer (referred to as MPU)-accounts for about 10% of the total polyurethane elastomer. Solid tires; printing and conveying rubber rollers; profiled rubber rollers; oil seals, washer ball joints, bushing bearings; O-rings; support pads; soles, rear roots, toe caps; linings; gears, etc., different applications, elasticity of choice The hardness range of the body is different. Applications in mining, metallurgy and other industries-sieve plates, shakers, etc. in the mechanical industry-rubber rollers, tapes, seals, etc .; applications in the automotive industry-tires, seals, etc .; in the light industry Applications-polyurethane shoe soles, polyurethane synthetic leather, polyurethane fibers; applications in the construction industry-waterproof materials, paving materials, potting materials, etc.
Polyurethane foaming machine is a special equipment for polyurethane foam infusion foaming. As long as the performance index of the polyurethane component raw materials (isocyanate component and polyether polyol component) meets the formulation requirements. This equipment can produce uniform and qualified foam products. It is made of polyether polyol and polyisocyanate through chemical reaction foaming in the presence of various chemical assistants such as foaming agents, catalysts, emulsifiers, etc. Polyurethane foaming machine can also be used for automotive interior decoration, thermal insulation wall spraying, thermal insulation pipe manufacturing, bicycle and motorcycle seat sponge processing.