In the current era where new materials are leading industrial transformation, Nanjing Jufa New Materials Co., Ltd. (hereinafter referred to as "Nanjing Jufa") adheres to the concept of "Technology Creates the Future", delving deeply into the application of polyurethane and modified polyurethane resins in the field of composite materials. With innovative products and high-quality services, it provides efficient, environmentally friendly and high-performance material solutions for various industries, driving the composite materials industry to a higher level. 

  The polyurethane resin family is rich in variety and widely applied in multiple fields of life and industry. From daily care to high-end industrial manufacturing, it can be found everywhere. In the field of daily care, it is an important raw material for various beauty and care products, providing assistance for people's daily skin care. In the field of basic materials, as the raw material for hard foam plastic and soft foam plastic, it makes products such as sofas and mattresses in the home both comfortable and durable. As a widely used adhesive material, polyurethane adhesives can firmly bond various materials and play a key role in scenarios such as furniture manufacturing and electronic equipment assembly. At the same time, it is also the raw material for anti-corrosion coatings, providing long-term protection for metal components, pipelines, etc., and extending their service life.

  In the field of high-performance materials, polyurethane resin has truly shone. As the matrix resin of high-performance composite materials, it endows the composites with outstanding properties, achieving innovative applications in multiple key industries and promoting industrial upgrading. 

  In the field of transportation, polyurethane composites have become the ideal choice for lightweight and high-performance applications. In high-speed rail manufacturing, carbon fiber polyurethane profiles reduce weight by 45% compared to traditional aluminum alloys, effectively lowering the overall weight of the train and improving operational efficiency. Polyurethane leaf springs, on the other hand, are 50% lighter than steel leaf springs, not only reducing the vehicle's load but also enhancing ride comfort and offering superior durability, thereby extending the maintenance cycle. In the automotive industry, polyurethane composites are used to manufacture lightweight profiles, deflectors, A-pillars, side guards, radiator grilles, rear bumpers, and low sills, among other components, helping vehicles achieve lightweight goals, reduce energy consumption, and simultaneously enhance safety performance and aesthetic appeal.

  The wind power industry is an important application field for polyurethane composite materials. The wind turbine blades produced by the polyurethane RTM process have superior performance. Their excellent mechanical properties enable them to be perfectly combined with glass fiber, achieving higher bonding strength. The outstanding fatigue resistance ensures the stable operation of the blades in long-term and complex wind conditions. In addition, this process features high production efficiency, faster injection and curing speeds, which can effectively shorten the production cycle. Moreover, it has a low comprehensive cost, requires less mold investment, and offers competitive resin prices, providing strong support for the large-scale development of the wind power industry. Meanwhile, the wind turbine blades made of polyurethane composite materials also feature light weight, high strength, typhoon resistance, low-temperature resistance and corrosion resistance, making them suitable for the complex climatic conditions in different regions.

  In the fields of power and communication, polyurethane winding composite material technology has brought revolutionary changes. The electric poles and 5G communication towers manufactured with this technology have many advantages. The lightweight feature makes installation and transportation more convenient, reducing the difficulty and cost of construction. High-strength performance ensures a long service life of the tower and reduces the frequency of replacement. Its corrosion resistance makes it require no long-term maintenance, reducing the operating costs in the later stage. The product has a low cost and an environmentally friendly manufacturing process, free of small-molecule volatile substances and with a low odor, which conforms to the concept of green production. Compared with traditional metal towers, polyurethane composite material towers effectively solve the problems of heavy weight, difficult installation and transportation, large installation area, corrosion requiring long-term maintenance, and environmental pollution during the production process of metal towers. They reduce system costs and improve product quality. Currently, they have been successfully applied in Harbin and other places.

  Polyurethane pultruded composite materials are widely used in the fields of construction and new energy. Polyurethane pultruded window frames have excellent air tightness, with air tightness indicators q1 (ml/m · h)≤0.45 and q2 (m³/(m² · h))<1.5. They can effectively isolate outdoor air and enhance the energy-saving effect of buildings. In addition, polyurethane pultrusion products also include cable trays, ladders, high-speed rail equipment cabins and skirts, high-speed rail walkway plates, insulating arm wrists, railway fishtail plates, solar frames and brackets, carbon fiber beam plates, cable protection pipes, pallets, etc. These products are manufactured using the polyurethane pultrusion process and feature outstanding performance, efficiency, cost and environmental advantages. In terms of performance, it features high tensile, bending and shear strength moduli, good toughness, impact resistance, strong machinability (capable of drilling and tapping), and strong resistance to crack propagation. It can replace steel and aluminum in special fields. In terms of efficiency, the pultrusion speed can reach 1 to 3 meters per minute, which is 3 to 5 times that of polyester and 5 to 10 times that of epoxy. Moreover, it is highly efficient, and the same equipment and facilities can achieve more output. In terms of cost, under the same strength, the product is thinner and lighter, requiring less material, and its cost is comparable to or even lower than that of unsaturated pultrusion. In terms of the environment, it uses high-boiling-point materials, contains no small-molecule volatile substances, and the curing process is smoke-free with a low odor. It is the most environmentally friendly thermosetting pultrusion resin.

  In addition to the above applications, polyurethane composite materials also have a variety of processes and product forms to meet the personalized demands of different industries. The polyurethane resin used in the wet molding process of polyurethane, compared with epoxy resin, has higher strength and better flame retardant performance, faster wetting speed and curing, better processability, lower cost, and is suitable for the manufacturing of various products. Polyurethane SMC products have significant advantages. Compared with unsaturated, vinyl and epoxy, they feature high strength, high modulus, low shrinkage, low VOC, good insulation and durability, and lower cost. They are mainly used in the lightweighting of automobiles and construction machinery, replacing metal materials and existing unsaturated resin materials. It is also used to replace metal materials in the fields of power and rail transit. Polyurethane prepreg also performs well. Compared with epoxy resin, it has high strength, high modulus, excellent flame retardant performance, and can be stored for a long time at room temperature without cold storage, reducing storage and transportation costs. It cures quickly at high temperatures, can be thermally demolded, and has high production efficiency. Its main markets include lightweighting of rail transit, automotive lightweighting (such as new energy battery boxes), and the aviation market.

  Jufa New Materials has also launched a number of targeted polyurethane product series, such as the Urethan series, which is suitable for RTM/vacuum injection and wet molding processes. It can be combined with glass fiber and carbon fiber and applied in wind turbine blades, automotive interior and exterior trims, high-speed rail and other fields. It features low VOC and odor grades, meeting EU environmental protection requirements. It has low viscosity and fast injection speed. It features fast curing, high production efficiency, good toughness, high impact strength and is not prone to cracking.

The Urecom series is suitable for internal curing/external curing winding molding processes. When combined with glass fiber and carbon fiber, it can be used in products such as utility poles and drive shafts. It features good toughness, high strength, low sensitivity to moisture, long gel time, and excellent processability.

The Urepul series, when combined with glass fiber and carbon fiber, is applied in fields such as cable trays, insulated ladders, Bridges, high-pressure pipelines, landscape engineering, high-speed rail, tracks, and photovoltaic. The FR series has an oxygen index of over 32 or reaches V0 flame retardancy, meeting the EN45545R7 HL3 test requirements for high-speed rail. The LV series features extremely low viscosity. It can achieve rapid infiltration, significantly reduce pultrusion traction force, and is particularly suitable for thick products and carbon fibers. Moreover, the one-component polyurethane resin combines the mechanical properties of polyurethane and the processability of free radicals without the need to change the existing process.

The Urepreg series is used for manufacturing SMC and prepreg products. The tensile and flexural strength of SMC products is 3 to 4 times that of ordinary unsaturated SMC. They have good toughness, strong impact resistance, high temperature resistance, good flame retardancy, and low VOC. Prepreg products feature high strength, high modulus, and excellent impact resistance. They can be stored for a long time at room temperature with low storage and transportation costs. They cure rapidly at high temperatures, have a high heat distortion temperature, can be demolded at high temperatures, and have high production efficiency. While meeting the requirements of high flame retardancy, they maintain high mechanical strength and are widely used in the automotive, rail transit, electronic products and other fields.

  The amount of unsaturated resin used represents the scale of composite materials, while the amount of polyurethane resin used represents the advancement level of the composite materials industry. The polyurethane resin products of Nanjing Jufa can replace unsaturated resins and epoxy resins in terms of performance. They feature higher strength and toughness, higher production efficiency, lower cost, excellent flame retardant properties, and are environmentally friendly in production. In terms of material substitution, it can replace metals such as aluminum alloy, achieving lightweight, corrosion resistance and better durability.

  In the future, Nanjing Jufa will continue to uphold the spirit of innovation, constantly develop and upgrade polyurethane resin products, expand their application boundaries, bring breakthrough material solutions to more industries, contribute to the green, efficient and high-quality development of industries, and write a brand-new chapter in the composite materials industry with technology and quality.