Polyurethane spraying is a high-pressure polyurethane spraying equipment. Because the material of the high-pressure polyurethane spraying equipment hits at high speed and rotates violently in the mixing chamber with a small space, the mixing is very abundant. The high-speed moving material forms fine mist droplets at the nozzle of the spray gun, and sprays them evenly onto the surface of the object.
It should be noted that polyurethane can be divided into hard foam and soft foam. Hard foam is generally used for wall insulation, and soft foam is more used for filling. For example, the commonly used beautifying agent in life is soft foam.
Due to the simple molding process and remarkable thermal insulation effect, polyurethane spraying is widely used in building roof and wall insulation. It has been popular in developed countries for more than 40 years. Some countries even adopt legislation or establish standards to encourage the development of polyurethane spraying.
How to do polyurethane spraying for interior wall insulation?
For general houses, the common practice of polyurethane spraying is to set the keel on the wall, and spray it evenly on the wall with the polyurethane foaming agent prepared on site.
After waiting for it to foam completely, use a special tool to sand it flat, and finally fix the decorative panel on the keel.
What are the advantages of polyurethane spraying?
1. Better insulation effect
Compared with traditional thermal insulation materials such as extruded board and polystyrene board, polyurethane has better thermal insulation performance. In the southern region, only a thickness of 5cm is needed to meet the wall heat transfer requirements of ultra-low energy consumption buildings.
2. High bonding strength
Polyurethane itself has a certain viscosity, and after foaming, it can be stably bonded to the wall surface, and the insulation material will not fall off in the later use.
3. Short construction period
The construction efficiency is high. Generally, the construction can be completed in one day, and the next decoration process can be entered after 24 hours of polyurethane spraying.
What are the disadvantages of polyurethane spraying?
1. High cost
Polyurethane rigid foam of the same thickness is more than three times more expensive than extruded board. Due to price factors, it is generally only used in certain high-end projects.
2. Restricted by the external environment
Polyurethane foaming on site has certain requirements for the temperature and humidity of the environment. Generally, the construction temperature should not be lower than 10°C, and the relative humidity should be less than 80%. It cannot be constructed in rainy days.
Application of polyurethane spraying in HVAC industry
After the introduction of polyurethane spraying into China, it is widely used in all walks of life.
Due to its high price, the application of polyurethane spraying in the HVAC industry is mainly concentrated in cold storage, refrigerated trucks and other fields with relatively high insulation requirements.
By the way, YG also provides other spraying machines such as mortar spraying machine, shotcrete spraying machine, GRC spraying machine ,gypsum spray machine,and other equipment.
In addition, some high-end real estate projects may use polyurethane spraying for wall insulation for the purpose of applying for national certification subsidies such as ultra-low energy buildings.
It is very rare for general owners to directly use polyurethane spraying for interior wall insulation at home.
in conclusion
For ordinary residences, using extruded boards for interior wall insulation is very cost-effective; and if you are relatively less concerned about cost, then polyurethane spraying is indeed a better solution.
It is recommended that you choose which solution to use according to your actual situation.
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