Polyurethane Spraying Compound System
Processes with functions such as heat preservation and insulation
Polyurethane sprayed insulation material is an important branch of the polyurethane industry, which is characterized by its multi-purpose use, and at the same time has the functions of heat insulation and waterproofing.
This type of product has been used in the European construction industry for 40 years since the 1960s, and some countries have adopted legislation to make polyurethane spraying the designated thermal insulation and waterproofing material for the construction industry. With the rapid development of China’s building energy-saving market, polyurethane spray coating has been widely used in the field of building thermal insulation and waterproofing, and has become one of the leading market thermal insulation and energy-saving products.
Sprayed polyurethane includes two parts: direct spraying with primer and synthetic resin, and spraying with foamed polyurethane. The primer and synthetic resin direct spraying is mainly used for anticorrosion and wear-resistant, sealing, heat preservation, etc., characterized by good abrasion resistance, excellent resistance to erosion and abrasion, spray coating from 25μ to several millimeters can be sprayed in a single molding and does not produce the phenomenon of hanging flow.
Chinese name polyurethane spraying
Polyurethane coating
Function heat insulation, waterproof
Introduction of Polyurethane coating
Polyurethane coating is a high-pressure polyurethane spraying equipment. Because of the high pressure spraying equipment, the material in the mixing room with very small space of high-speed impact and violent rotation, mixing is very full. The high-speed movement of the material in the spray gun mouth to form a fine mist droplets, uniformly sprayed to the surface of the object.
Foaming polyurethane spraying is mainly used for heat preservation, sealing in heat preservation and refrigeration, for it is not easy to use the mold, such as large spherical storage tanks, large-diameter profiled pipe fittings, cold storage walls and other thermal insulation materials, such as wrapping, can be realized on-site foaming.
Main advantages
(1) For various shapes of the substrate, whether it is a plane, facade or top surface, whether it is round, spherical or other irregular shapes of complex objects, can be directly implemented spray foam processing, without the need for expensive mold manufacturing costs;
(2) The shape of the foam insulation layer molded by spray foaming is consistent with the shape of the substrate object; there is no seam, and the insulation effect is good; there is a layer of dense protective skin on the outside of the foam layer, which can better protect the internal core material, and at the same time, it is easy to carry out the coating of the external surface and further repair;
(3) High production efficiency, especially suitable for large-area and shaped objects’ insulation treatment, fast molding speed and high production efficiency.
(4) bonding: strong bonding ability, can be in the concrete, masonry, wood, steel, asphalt, rubber and other surfaces bonded firmly; (5) thermal conductivity: the bonding capacity of the product is very high, and it is easy to be applied to the external surface of the product.
(5) Thermal conductivity: 0.017-0.022W/m.k, lower than rock wool, glass wool, polystyrene boards, extruded plastic boards and other building thermal insulation materials.
(6) water repellent performance: water repellent rate of 95% or more; (7) sealing performance: water repellent rate of 95% or more.
(7) sealing performance: no cavity, no seams, the building envelope completely wrapped, effectively preventing the wind and moisture through the gap flow in and out of the building, to achieve complete sealing; (8) dimensional stability.
(8) Dimensional stability: dimensional stability of less than 1%, with a certain degree of elastic deformation capacity, elongation greater than 5%.
(9) Constant performance: polyurethane is an inert material, does not react with acids and alkalis, and is not a food source for insects and rodents, so it can keep the nature of the material and thermal insulation performance constant.
(10) wind resistance: compressive strength > 300Kpa, tensile strength > 400Kpa, has a strong wind uncovering, and its foam can be drilled into the wall gaps, increasing its shear resistance.
Scope of use
1. Polyurethane spraying on external wall
2. Cold storage polyurethane spraying
3. Pipe polyurethane spraying
4. Polyurethane spraying on tanks
5. Polyurethane spraying for arched corrugated steel roofs
6. Polyurethane spraying for door-type steel structure
9.Environmental protection products polyurethane spraying
Equipment
The black and white materials are heated and pressurized by polyurethane, and form high-pressure impact in the spray gun, forming a vortex mixing very fully. The high-speed movement of the material in the spray gun mouth to form a fine atomized droplets, evenly sprayed to the surface of the object. The uniformity of mixing, as well as the atomization effect will affect.
The whole polyurethane spraying system includes: main unit, spraying gun, heating line, lifting pump, and connecting pipes between each component, spare parts, related tools, air compressor (1m³, 8kg pressure).
Flush mounted pump polyurethane sprayers can provide greater and more stable pressure and are being increasingly favored in major design departments. The perfect coaxiality structure design of the flush mounted booster pump minimizes the wear and tear of the seals, there is no pressure difference when working, and the fluctuating value of the commutation pressure is ideal and stable; the high-speed circulating lubricant in the anti-curing lubrication cylinder can quickly take away the leaking raw materials or impurities, and the black material shaft is always immersed in the lubricant to avoid the phenomenon of crystallization
