Flame-retardant lightweight structure core and preparation method thereof
A core material and material technology, applied in the field of materials, can solve the problems of heavy weight, low strength, difficult to meet the requirements of high-speed rail transit, and achieve the effect of light weight and good mechanical properties
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example Construction
[0029] The invention provides a method for preparing a structural core material, comprising:
[0030] Thermosetting resin and fibers are mixed and extruded to obtain a mixture;
[0031] The mixture is spread on the cells of the honeycomb core material, and hot-pressed and foamed to obtain the structural core material.
[0032] The invention mixes thermosetting resin and fiber and extrudes to obtain the mixture. The method of mixing the thermosetting resin and the fiber is not limited in the present invention, preferably mixing in a mixer; the extrusion in the present invention is preferably extrusion using a twin-screw extruder. The mixture is preferably dried after extrusion, and the drying temperature is preferably 100-110°C.
[0033] The mixture of the present invention preferably comprises a thermosetting resin and a blowing agent. The thermosetting resin is preferably selected from one or more of phenolic resins, epoxy resins, unsaturated resins, melamine resins and po...
Embodiment 1
[0047] Mix 75 parts of phenolic resin, 25 parts of AC foaming agent and 30 parts of short glass fibers with a length of 5mm, stir and extrude through a twin-screw extruder, and heat at 105°C for 5min through a drying tunnel to obtain a mixture. Select the aluminum honeycomb core, select the hexagonal honeycomb core, the height is 13mm, the aperture is 25mm, and the wall thickness is 0.3mm. And stretch the aluminum honeycomb core (the aluminum honeycomb raw material is a honeycomb block, which needs to be stretched into a regular hexagon with an aluminum honeycomb stretching machine) and placed on the release paper, and then spread the dried material on it , and place a layer of release paper on top. The release paper is used to prevent the material from adhering to the press plate, and the release agent can be sprayed or wiped on the press plate instead of the release paper. Transfer the release paper and its contents into a hot press, press the press to 13mm, and press at 17...
Embodiment 2
[0050] Mix 80 parts of phenolic resin, 20 parts of AC foaming agent and 35 parts of 10mm short glass fiber, stir and extrude through a twin-screw extruder, and heat at 105°C for 6 minutes through a drying tunnel to obtain a mixture. Select the aluminum honeycomb core, select the hexagonal honeycomb core, the height is 25mm, the aperture is 15mm, and the wall thickness is 0.2mm. And stretch the aluminum honeycomb core. Prepare a layer of glass fiber prepreg, then place the stretched aluminum honeycomb core on the prepreg, then lay the dried material on it, and place a layer of glass fiber prepreg on top . Spray a release agent on the pressing plate, then put the material on the pressing plate of the press, press the press to 26mm, and heat press at 160°C and 0.7MPa pressure for 30 minutes to obtain the structural core material.
[0051] Adopt the method described in the present invention to test the structural core material that embodiment 2 prepares, gained structural core m...
PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
| compressive strength | aaaaa | aaaaa |
| density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More