What are the circumstances in which the pultrusion should be performed?
(3) the heat deformation temperature of hot deformation temperature high extrusion is 186 DEG C, do not soften at high temperatures, -60 C constant crisp, to ensure the normal use of various environmental temperatures.(4) the water absorption is low, the water absorption of ordinary FRP products is less than 0.5%, while the water absorption rate of pultrusion section is only 0.257%, which is suitable for use in humid environment(5) heat transfer coefficient and low coefficient of thermal insulation rigid PVC pultruded profile approach, made with the single frame double glass insulating window insulation coefficient is only 2.69W/ (M2? K), while the thermal insulation coefficient of the same type of steel, aluminum window made up of 4.0W/ (M2? K). Show that the energy saving glass steel doors and windows is obvious.(6) strong corrosion resistance pultruded profile by 3%HCI solution for 24h, its hardness retention rate was 95%; the 3%NaCl solution for 24h, its hardness retention rate of 89%. so the FRP pultruded profiles for making doors and windows is not only suitable for general residential houses, hotels, restaurants, and more suitable for coastal areas and the corrosive working environment of industrial plant use.(7) to meet the requirements of the environment, the production process of the extruded section has the characteristics of low noise, high efficiency, low power consumption, low pollution, etc., and it conforms to the relevant environmental requirements of the state
(1) the tensile strength of high strength extruded profiles for 150 ~ 300MPa, the bending strength reached 200 ~ 300MPa, the 1000h accelerated the bending strength after aging the retention rate of up to 78%.(2) the deformation rate is low. The length of the glass reinforced plastic pultruded section is accelerated by 1000h and the width change rate is +0.03%. The width change rate is -0.07%.. Therefore, the geometry and size of the product made of this pultruded section can be stable for a long time
The roving yarn assembly in yarn frame, yarn unwinding through a series of guide roller and cluster grid plate, roller set, enter the resin impregnated resin impregnated yarn groove. Then through the pre forming die, the die is required according to the shape of products and configuration in the guiding device. The mold after discharge excess resin and bubbles into the cold. Cold mold cooling by cooling water, so that the resin viscosity, reduce the loss, and finally into the mold, the fiber reinforced material and resin molding in mold curing, and then the traction device is pulled, cut into required length of products by cutting device.
