The pultrusion molding process is to extrude the continuous glass fiber bundle impregnated with resin glue and other continuous reinforcing materials such as glass cloth tape, polyester surface felt, etc. A method for forming glass fiber reinforced plastic profiles by heat curing in a curing furnace. Also known as a continuous pultrusion process. The main production pipes, rods, profiles, plates and other glass fiber reinforced plastics.
The advantages of the pultrusion molding process are: simple equipment, low cost, high productivity, easy to form an automated production line, and stable product quality; can give full play to the role of reinforcing materials, high mechanical properties, especially longitudinal strength and modulus; effective use of raw materials High rate, basically no corner waste; the longitudinal and transverse strength of the profile can be adjusted to suit different use requirements; its length can be cut as needed.
The resins widely used in pultruded products are unsaturated polyester resins, followed by epoxy resins, which are mainly used for products with high mechanical properties and heat resistance requirements, in addition to vinyl ester resins, phenolic resins, thermoplastic resins, etc. The requirements of the pultrusion molding process for the resin glue are: low viscosity, easy to penetrate the reinforcing material; long gel time (usually required to use more than 8 hours), fast curing, to meet the requirements of continuous molding; good adhesion, The curing shrinkage is small; the flexibility is good, and the product is not easy to crack.
Application of epoxy resin composite pultrusion profile
Epoxy resin composite pultrusion products are mainly used for:
1) The electrical field is currently the most widely used field and one of the focuses of development. Such as transformer air duct positioning rods, high-voltage insulator mandrels, high-voltage cable protection tubes, cable racks, insulating ladders, insulating rods, poles, track guards, cable distribution racks, motor parts, etc.
2) The field of chemical anticorrosion is the fastest growing field in recent years. Typical products include: pipe network support structures, sucker rods, downhole pressure pipes, wastewater treatment equipment, chemical baffles, railings, stairs, platform handrails, grille floors, etc. in chemical, petroleum, paper, metallurgy and other factories.
3) In the field of building structure, it is mainly used for light structure, superstructure of high-rise structure or special purpose structure. Such as movable room structure, profiles for door and window structures, trusses, light bridges, railings, tent brackets, ceiling structures, large boron structures, etc.
4), sports and entertainment fields such as fishing rods, hockey sticks, snowboards, pole vaults, bows and arrows, etc.
5) Transportation fields such as car racks, truck frames, refrigerated carriages, car springboards, luggage racks, bumpers, decks, electric train track guards, etc.
6) In the energy field, it is mainly used for solar collector brackets, wind turbine blades, and oil well conduits.
7) In the aerospace field, such as aircraft and spacecraft antenna insulation pipes, motor parts for spacecraft, aircraft composite I-beams, trough beams and square beams, aircraft tie rods, connecting rods, etc.
Post time: Apr-20-2022