Preparing composite of modifing glass fiber reinforced plastics pultrusion section bar and preparation method thereof

Abstract

The invention is a combination for preparing modified glass fibre reinforced plastic pull-extrude (GFRP) sectionbar including unsaturated polyester resin 92.6-64 (wt.%), nano silicon dioxide 0.5-4, calcium carbonate 5-20, benzoyl peroxide 0.2-2, methyl ketone peroxide 0.2-2, demoulding agent 0.5-2 and mill base 1-6. Batching in the above weight percents, selecting a ultrasonic wave dispersive apparatus to fully disperse the nano silicon dioxide in 2Kg resin; dispersing and blending, where the glue soluting temperature is controlled at 30 plus or minus 2 deg.C and the fully blending and dispersing time is 1 hour; adding in other additives in proportion in turn, fully blending until the mixture is uniform and meets the preset viscosity number; prepring structural sections: pouring the well-prepared glue soluting in a presoaking glue tank and keep constant temperature at 25 plus or minus 2 deg.C; placing the glass yarn felts ccording to a sectionbar perform guiding device to enter in the glue tank for fully soaking with the glue; making the yarn felts soaked with resin glue soluting enter in a well-heated mould for solidification moulding, and pulling into products by a hydraulic drag device, and at last cutting for fixed size.

Description

technical field [0001] The invention belongs to the processing of ingredients, in particular to the manufacture of pultruded glass fiber reinforced plastics or molding materials modified by nanometer materials. Background technique [0002] The composite material made of glass fiber and its products as reinforcing material and synthetic resin as binder is called glass fiber reinforced plastic, also known as glass fiber reinforced plastic (FRP). [0003] The known pultruded FRP is made of glass fiber as the main reinforcement material, thermosetting unsaturated polyester resin is used as the binder, and is made into a composite material through pultrusion processing, and FRP rods and strips are processed by continuous pultrusion , pipes and angle steel, channel steel and other profiles. [0004] The known pultruded FRP generally has the problems of low surface hardness, poor wear resistance, and poor surface finish. The following defects are reflecte...

AI Technical Summary

Problems solved by technology

[0004] The known pultruded FRP generally has the problems of low surface hardness, poor wear resistance, and poor surface finish. The following defects are reflected in the profile: insufficient transverse strength, excessive longitudinal and transverse strength ratio, poor surface finish, and, Because the broken end of the glass fiber is exposed, it forms a "thorn" of the glass fiber, which has a sticky feeling, etc., which is not conducive to wider industrial applications.

[0007] Since the existing technology still cannot solve the aforementioned technical problems well, the industry is constantly pursuing better technical solutions to achieve its industrial goals