A kind of preparation method of multi-component low-density glass microbead prepreg

Abstract

The invention discloses a method for preparing a multi-component low-density glass microsphere prepreg, which adopts 2-5 different specifications of glass microspheres in a resin to carry out a spatially staggered arrangement of a pressed adhesive film, and the staggered arrangement of After the film of the glass microspheres is pressed into the fiber cloth, the multi-component low-density glass micro-bead pre-impregnated cloth is obtained; the preparation method of the multi-component low-density glass micro-bead pre-impregnated cloth of the present invention, the prepared glass micro-bead pre-impregnated cloth The cloth density is low; it has better mechanical strength and thermal insulation effect while ensuring the ablation ability of the material.

Description

technical field [0001] The invention belongs to the technical field of composite thermal insulation materials, and particularly relates to a preparation method of a multi-component low-density glass microbead prepreg. Background technique [0002] With the development of aerospace vehicles, the demand for heat insulation and heat protection materials is also increasing, and higher requirements are also put forward for the heat insulation performance of heat insulation and heat protection materials. For example, the flight speed of the aerospace vehicle is maneuvering within the range of 5Ma to 10Ma, and the temperature of the outer surface of the aerospace vehicle during the flight reaches a maximum of 1000 to 1300 °C. In order to ensure the safe and normal flight of aerospace vehicles for a long time, the materials used in aerospace vehicles should have good ablation resistance and good thermal insulation performance, as well as high mechanical properties and low density. ...

AI Technical Summary

Problems solved by technology

[0003] As a kind of heat insulation material, glass fiber reinforced plastic material is wound and cured by glass cloth / phenolic prepreg cloth. After molding, the material has the characteristics of high strength and ablation resistance, so it is mostly used as heat-resistant material. With the development needs of aircraft, Only heat protection can no longer meet the existing requirements, and it should also have high mechanical properties and low material density; the existing disclosed FRP material has a high density, and has the defect of poor mechanical properties; There is a demand for high-efficiency heat-insulating FRP materials with excellent thermal properties and certain mechanical properties

[0004] The existing disclosed low-density glass fiber microsphere prepregs are prepared into low-density prepregs by organically combining three matrix materials of glass microspheres, fibers and resins in a reasonable proportion, but usually the realization process adopts the same method. Specification glass microspheres, if you want to continue to reduce its density, you need to use lower density glass microspheres, but the lower the density of glass microspheres, the larger the particle size and specific surface area, and the larger the occupied space, you need to sacrifice fibers to increase resin , to ensure the adhesion of the material, but this method will reduce the mechanical properties of the material, so that the rigid support and ablation of the material cannot be realized

Images