Pultrusion process is forming the technology of composite material for preparing composite material products, and it’s a composite forming process of mechanization technology in the highest, therefore, the production efficiency is very high.
There are two types of pultrusion processes: one is the process of fiber materials impregnated resin, then goes through a heating type with the excess resin for extrusion, molding resin curing by heating in the model, stretched out. The other one is in constant pultrusion speed will increase the fiber pull overheating type. At the same time, will have been triggered by resin injection into the type, make full immersion of the fiber, and the gel solidification. The former method for resin system with period longer, resin system for the latter method required shorter. Resin molding pressure of 0.1-0.5Mpa.
Composite materials pultrusion forming technology and manufacturing technology of steel, with greater flexibility, less equipment investment, it can produce more section profile with complex shape, in order to meet the needs of more use. Composite materials pultrusion profiles of density are lighter than aluminum, high specific strength and modulus.
The use of resin pultrusion process includes unsaturated polyester resins, vinyl ester resin, epoxy resin, phenolic resin, thermoplastic resin.
Pultruded fiberglass manufacturing in addition to traditional glass steel material corrosion resistance, aging resistance, insulation performance, but also has the product size stability, good quality, high production efficiency. It is precise because of these excellent properties and its characteristics, and has been applied in more and more areas, has an extremely broad market at home and abroad.
With the rapid development of pultrusion technology, pultrusion quality performance has greatly improved, the size and structure of the larger, more complex shapes can be developed. Therefore, its application has been fully extended, pultrusion products are widely used in the construction industry, electrical industry, chemical industry, transportation industry, corrosion of sports entertainment and many other fields.