Polyether composite material for pipeline insulation
As an insulation material, polyurethane rigid foam has an irreplaceable position in many aspects due to its extremely low thermal conductivity and convenient molding process, and is of extremely important significance in saving energy. . In the western and northern regions of my country, there are a large number of transportation pipelines such as oil field pipelines, central heating pipelines, water pipelines, etc. that need to be insulated, and most of them have been or are yet to be insulated with polyurethane materials.
Summary
Note: The above parameters can be adjusted according to different site conditions and requirements. < r::/r/~/_.
Overall density/~~~
< r::/r/~/_.
Materials for small tubes and large tubes for prefabricated tube shells
Polyether composite materials used for pipeline insulation are usually composed of polyether, foaming agent, catalyst, foaming agent, flame retardant and other components. According to the different foaming agents, they can be divided into high fluorine type, There are several main types such as fluorine-free b type and fluorine-free all-water type.
Polyurethane materials used for pipe insulation are generally divided into three types according to the molding method: prefabricated molding, on-site casting molding and on-site spray molding. According to the temperature of the transmission medium during application, they can be divided into ordinary type and temperature-resistant type (which can withstand long-term temperature ℃ and above) two categories.
Compressive strength (): Water absorption:
Dimensional stability (℃,): Thermal conductivity: .3/
Usually the polyether compound is a light yellow or brown-red viscous transparent liquid , no coagulation, thick matter and unevenness, no mechanical impurities.
Precautions for use
Milk whitening time~~
① Do not let the material come into contact with moisture, and please pay attention to proper ventilation at the production site.
Gel time~~~
Chemical composition and properties
Curing time
Packed in dry and clean special galvanized iron drums, sealed and stored in a dry, cool, ventilated place, waterproof, sunproof, Heat-proof optimal storage environment temperature:
~℃
.
② When using foam, it is best to control the material temperature within an appropriate range to ensure that the system has appropriate reaction performance and fluidity
③ When foaming, the ratio of white material to black material should be determined strictly in accordance with the instructions for use. , to ensure that the process performance of the system and various basic properties of the foam are not affected
Reference performance indicators
Reference process parameters
Packaging, storage and transportation
Polyether composite materials for pipe insulation