Introduction To The Polyurethane / Glass Fiber Composites

In recent years, polyurethane resin makes its composite stand for its good toughness, fast curing and no styrene smoke. With the mastery of polyurethane molding technology and the progress in controlling its reactivity to extend its application period, polyurethane has entered the field of composite materials dominated by unsaturated polyester and vinyl ester resin. In the past, polyurethane composite materials were mainly formed by structural reaction injection method (SRIM), such as pickup truck box, underfloor, luggage rack, inner door plate, etc. (polyurethane is foamed). However, in recent years, polyurethane composites have developed technologies such as pull extrusion, winding, vacuum perfusion and long fiber injection, mainly using unfoaming polyurethane composites to make window frames, baths, light poles and large parts of trucks and off-road vehicles. Polyurethane pull squeeze: polyurethane pull squeeze generally has low viscosity, moderate to high reaction, good impact strength and toughness, and short beam shear performance. Compared with other materials, pull-squeezing with polyurethane can produce many benefits. It can improve the content of glass fiber in the products and greatly improve the strength of the products. For example, with glass fiber and polyurethane resin, the strength of the window frame is 8 times higher than that of the PVC window frame, and its electrical conductivity is 40 times lower than that of aluminum, so the insulation performance is much better. At the same time, because the polyurethane pull-out window frames are less brittle, they do not crack and are durable. High performance polyurethane / glass fiber composite material is a kind of high strength, high modulus, light polymer composite material with high hardness polyurethane elastomer as the matrix material, glass fiber as the reinforcing material, using continuous pull and extrusion process. Polyurethane pull-extrusion technology products not only have higher strength and better heat insulation effect than traditional materials, but also more lightweight and environmental protection. Its applications are very broad, from the initial gorgeous bathtub, to surfing and skis, to today's window frames, container floors and other innovative applications, polyurethane composites have been integrated into every aspect of our daily life. It is reported that in the past few years, China's demand for composite materials has been gradually increasing. Composite material is a high-tech material, which integrates the characteristics of several materials into a comprehensive solution with excellent new properties. Polyurethane composites have attracted much attention from all industries because of their unique properties, such as lightweight, high strength and rigidity, and their ability to help achieve higher cost efficiency and ecological responsibility. Especially in the construction and transportation industries, innovative technologies and applications are even more so