Industry news

I believe many people are not very familiar with fiberglass mesh cloth. Even if we tell you what it is used for, you will only feel surprised. Fiberglass mesh cloth is actually an external wall insulation mesh cloth, which is a new type of building material in construction engineering. It not only has the characteristics of anti-corrosion, crack resistance, but also high strength. However, fiberglass mesh cloth is not perfect and its quality can be affected by some factors. So, let's take a look at the factors that affect the quality of fiberglass mesh cloth together?
(1) The influence of wind
The construction of fiberglass mesh cloth is carried out outdoors. When the wind speed exceeds 5m/s, the heat loss during the foaming process is too large, the loss of raw materials is too large, the cost increases, and the atomized droplets during spraying are easily scattered by the wind, causing pollution to the environment. Therefore, when the wind speed exceeds 5m/s, construction is not suitable. When necessary during construction, windproof curtains can be used to solve the problem.
(2) The Influence of Environmental Temperature and Wall Surface Temperature
The suitable temperature range for spraying polyurethane foam on glass fiber mesh cloth should be 10~35C, especially the temperature on the wall surface has a significant impact on construction. Due to the large thermal storage coefficient of concrete and brick wall, its surface temperature is usually lower than the ambient temperature in autumn and winter. At this time, the construction temperature must be strictly controlled during the spraying of polyurethane foam. When the temperature is too low, certain measures can be taken to heat insulate the raw materials and increase the temperature of raw materials to compensate for the bad foaming phenomenon easily caused by low wall temperature. When the temperature is lower than 10 ° C, foam is easy to fall off and bulge from the wall, and the density of foam increases significantly, wasting raw materials, so it is not suitable for construction when the temperature is lower than 10 ° C. When the temperature is above 35C, the loss of foaming agent is too large, which also affects the foaming effect.
(3) The influence of moisture on spray foaming
Due to the easy reaction of (- NCO -) groups in isocyanates with water to form urea containing structures, an increase in the content of these structures can lead to an increase in the brittleness of polyurethane rigid foam. In severe cases, it can affect the adhesion between polyurethane rigid foam and the surface of objects. Therefore, before spraying polyurethane rigid foam on the exterior walls of building glass fiber mesh fabrics, a layer of polyurethane moisture-proof primer should be applied first to eliminate the influence of water and moisture. Construction is generally strictly prohibited on rainy days.
(4) Wall base factor
The surface of the exterior wall coated with fiberglass mesh cloth of the building should be free of dirt, oil stains, moisture, and unevenness. If necessary, it should be cleaned, cleared, and removed first. Otherwise, it will have a significant impact on the adhesion, insulation, and flatness of the sprayed polyurethane rigid foam.
The above are the factors that affect the quality of fiberglass mesh fabric. If you have any questions about mesh fabric, you can consult online and believe in answering your doubts!