Reading: As we all know, polyurethane elastomer is developed on the basis of wear-resistant rubber "a kind of soft" just wear-resistant materials. It has been popularized and applied in various mining operations. However, traditional polyurethane elastomers are often molded by injection molding methods. It is difficult and costly to form special-shaped parts and large parts. The wear and corrosion of mining engineering equipment has always been a headache for mining engineers and managers. It is also one of the important causes of high production costs and low production efficiency. For many years, research on non-metallic materials with high wear resistance, high elasticity, high strength and high corrosion resistance suitable for mine applications has always been a very important research topic. The mining industry urgently needs a new kind of material and process to solve the problems of wear and corrosion in production. Best Mold Inspection,Medical Instrument Injection Molding Machine,Medical Instrument Mold Kit,Medical Instrument Mold List Global Injection Molds Co., LTD , https://www.globalinjectionmolds.com
As we all know, polyurethane elastomers are developed on the basis of wear-resistant rubber "a kind of soft" wear-resistant material. It has been popularized and applied in various mining operations. However, traditional polyurethane elastomers are often molded by injection molding methods. It is difficult and costly to form special-shaped parts and large parts. The introduction of Canada's Normanc brand of wear-resistant polyurethane spray products and technology, the emergence of the technology for the mining industry to provide a new choice, its application in the engineering shows an unparalleled superiority. It breaks through the limitations of molds used for wear-resistant and corrosion-resistant non-metallic materials. It is a new type of on-site curing and rapid prototyping technology. It extends the molding technology of polymer materials to a whole new field and greatly expands its application. range. At the same time, due to its excellent wear resistance, prominent anti-corrosion properties, anti-aging properties, on-site construction is simple, low cost and other advantages, the new material has a broad application prospects.
Polyurethane spray coating performance characteristics
The wear-resistant polyurethane spraying technology is essentially a method of applying a coating material. After curing, it forms a material with various mechanical properties, which has broken through the scope of the original coating and is an organic combination of new materials, new equipment, and new processes. Compared with traditional wear-resistant anti-corrosion materials (or coatings), the main performance in the following areas:
(l) Curing speed is fast, and it can be sprayed on any curved surface, slanted surface and vertical surface without flowing phenomenon. The gelling time is about 10 5, and 1m in can reach the walking strength.
(2) It is insensitive to moisture and moisture and is not affected by the ambient temperature and humidity during construction.
(3) 100% solid content, does not contain any organic matter, and is environmentally friendly.
(4) It can be sprayed or poured at a volume ratio of 1:1. The thickness of a single construction can range from hundreds of micrometers to several centimeters, which overcomes the disadvantages of many previous constructions.
(5) Excellent physical and chemical properties such as tensile strength, elongation, flexibility, wear resistance, aging resistance, and corrosion resistance.
(6) The formula system is arbitrarily adjustable, and the hand feel is from soft rubber (A3 0) to rigid elastomer (D 65).
(7) The coating is dense, seamless, and resistant to media. It is resistant to long-term erosion of water, seawater, acids, alkalis, salts, and oils.
(8) Adhesion is good, and the adhesion with steel is more than 10 MPa, and it will not fall off in long-term use.
(9) Resistant to ultraviolet light aging, no chalking or cracking when used outdoors for a long time. The general physical properties of polyurethane spray coating are as follows: gel time 10 to 120 5, tensile strength 12 to 45 MPa, elongation at break 150% to 80%, tear strength 30 to 90 kN/m, Shore hardness of 30 A ~ 6 5 D, the adhesion of steel 6 to 12 MPa, low temperature flexibility for a 30 °C bending without cracks.
Polyurethane spray coating is known abroad as a "two-liquid spray wear lining". According to the laboratory's determination of its wear performance, polyurethane spray coating wear resistance is 5 to 7 times that of ordinary natural rubber, is carbon steel 10 times more. The material not only has high strength but also has good cushioning and energy absorption properties.
Wear-resistant anti-corrosion polyurethane spray products are widely used in the industrial field, such as various vibrating screens for mines, slurry pumps, magnetic separators, thickeners, vibration plates for robots in the automation industry, manipulators, mold protection, mixing paddles for the sewage treatment industry, Filter presses, garbage trucks, pumps, valves and transmission lines for the water conservancy industry, sterile protection for food and medical equipment production workshops, wear protection for military equipment, and radiation protection for nuclear power plants. Polyurethane restorations are widely used in rubber, polyurethane and other elastomer restorations in ports, mines, cement plants, steel mills, and fertilizer plants.