Spraying polyurea elastomer has been widely used for concrete protection since its birth. Polyurea floor has unique advantages in durability, physical properties, construction and environmental protection.
Epoxy flooring was once very popular. It has the advantages of high strength, good gloss, smoothness, compactness, and beauty. But after decades of practical application, some shortcomings of epoxy floor are found.
The following are the advantages of polyurea floors compared with epoxy floors.
Flexibility
Epoxy has poor flexibility and is very easy to crack under external impact or temperature changes. The lower the temperature, the worse the low-temperature flexibility of the epoxy resin.
Polyurea coating is an elastomer material. Polyurea has good impact resistance, good toughness, and excellent resistance to concrete cracking. Polyurea materials can not only adjust the hardness in a wide range (from Shore A30 to Shore D65), but also maintain excellent flexibility at higher hardness. Polyurea has low temperature bending properties, and still has good toughness and impact resistance below 0℃.
Anti-slip performance
The epoxy surface is smooth, especially in the presence of water, it is easy to slip or fall. It is very unsafe for people to walk and difficult to brake on epoxy floor for forklifts or heavy passenger vehicles. The anti-skid performance needs to be further improved. (The anti-slip performance can be improved by adding anti-slip particles to the epoxy floor. After adding anti-slip particles, the anti-slip coefficient can reach up to 0.75).
The spraying polyurea material itself has good anti-slip properties, and its friction coefficient can reach 1.2 or more, which is mainly related to the special molecular structure of polyurea. More importantly, by adjusting the spraying parameters of the spray gun, the SPUA technology can be used to obtain a "pitted surface" structure covered with uniform particles, which has the dual effect of anti-skid and matting.
Construction temperature and period
Epoxy curing is slow, construction period is long. Epoxy construction in winter is not easy and it is easy to be restricted by temperature. Epoxy floor is generally divided into three processes of bottom, middle and surface. The construction speed is slow. People cannot put it into use within two days after completion, which affects the owner's production.
Polyurea has excellent construction performance. It can be sprayed and formed on any curved surface, inclined surface, and vertical surface. Polyurea coating is fast curing, gel in 5 seconds, 1min can reach walking strength. The construction efficiency of polyurea is high, and it only takes 30 minutes to spray a 100 square meter area. The construction is not affected by the ambient temperature and humidity, and can be constructed normally at sub-zero temperature. The thickness of one-time construction can reach about 2mm.
SPUA technology completely overcomes the above shortcomings of epoxy flooring while retaining all the advantages of epoxy flooring. At the same time, the physical properties and construction performance are greatly improved compared with epoxy floor. Polyurea floor is beautiful and elegant, color adjustable, good integrity, wear-resistant, non-slip, resistant to vehicle rolling, and easy to clean. Therefore, it is suitable for floors in the fields of petroleum, chemical, electronics, medicine, food, machinery, office, etc. Very good application prospects.
