Lightweight fiber-reinforced phenolic sandwich board and preparation method thereof

A light-weight fiber and fiber-reinforced technology is applied in the field of fiber-reinforced phenolic sandwich panels and their preparation, which can solve the problems of low foam strength on the bonding surface, small bonding area, low epoxy resin adhesive toughness and low flame retardant performance, etc. Achieve the effect of increasing strength and stiffness, high strength retention, good strength and stiffness

Active Publication Date: 2019-08-13
常州诺法新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the patent does not disclose the type of core material used, it adopts the post-adhesion method. For the foam core material, the foam strength of the bonding surface is low, and for the honeycomb core material, the bonding area is small, and the obtained boards have bonding strength. Low, poor vibration fatigue resistance of the board; and the toughness and flame retardancy of the epoxy resin glue used are low

Method used

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  • Lightweight fiber-reinforced phenolic sandwich board and preparation method thereof
  • Lightweight fiber-reinforced phenolic sandwich board and preparation method thereof
  • Lightweight fiber-reinforced phenolic sandwich board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0046] See figure 1 , The lightweight fiber-reinforced phenolic sandwich panel in this embodiment consists of two surface layers 2 and a core material layer 1 between the two surface layers 2 .

[0047] The core layer 1 is a fiber-reinforced phenolic lightweight foam layer with a density of 100-400kg / m 3 , the thickness is 4mm ~ 20mm.

[0048] The phenolic foam is obtained by foaming the phenolic resin in the core material layer 1 . The fiber that strengthens the phenolic foam in the core layer 1 is glass fiber, aramid fiber, carbon fiber, boron fiber, BN fiber, basalt fiber, polyethylene fiber, polypropylene fiber, polyimide fiber, PEEK fiber, LCP fiber One or a combination of two or more.

[0049] The surface layer 2 is a fiber-reinforced phenolic composite board, the specific gravity of the surface layer 2 is 1.3-2.0, and the thickness is 0.5mm-2mm.

[0050] The surface layer 2 is obtained by curing phenolic resin and fiber fabric. The reinforcing fiber of surface laye...

Embodiment 2）

[0071] See figure 2 , The lightweight fiber-reinforced phenolic sandwich plate of this embodiment is composed of two sandwich surface layers 3 and a core material layer 1 between the two sandwich surface layers 3 .

[0072] The core layer 1 is a fiber-reinforced phenolic lightweight foam layer with a density of 100-400kg / m 3 , the thickness is 4mm ~ 20mm.

[0073] The phenolic foam is obtained by foaming the phenolic resin in the core material layer 1 . The fiber that strengthens the phenolic foam in the core layer 1 is glass fiber, aramid fiber, carbon fiber, boron fiber, BN fiber, basalt fiber, polyethylene fiber, polypropylene fiber, polyimide fiber, PEEK fiber, LCP fiber One or a combination of two or more.

[0074] The sandwich surface layer 3 is composed of a sandwich layer 31 and surface layer plates 32 on both sides thereof.

[0075] The sandwich layer 31 is a fiber-reinforced phenolic heavy foam layer with a density of 400-1500kg / m 3 , the thickness is 2mm ~ 4mm. ...

Embodiment 3

[0107] (Example 3, the preparation method of sandwich plate)

[0108] What this example prepares is the lightweight fiber-reinforced phenolic sandwich plate of Example 1, and the rest of the preparation method is the same as that of Example 1, except that:

[0109] Step ② When preparing the foamed film to form the core material layer 1, mix 100 parts of foamable phenolic resin, 3 parts of surfactant, 8 parts of toughening agent, 5 parts of foaming agent, and 6 parts of curing agent, and mix the mixture Pour the material into a kneader, then add chopped fibers into the kneader, knead evenly, put it into a tablet machine to make a 1-8mm thin slice, the thin slice is a foamed film, and the surface is covered with an isolation film for use.

[0110] When preparing the foamed and cured composite in step ③, first remove the isolation film on both sides of the foamed film obtained in step ②, and then compound the prepreg tape obtained in step ① on both sides to obtain a foamed cured ...

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Abstract

The invention discloses a light-weight fiber-reinforced phenolic sandwich plate and a preparation method thereof. The light-weight fiber-reinforced phenolic sandwich plate is composed of two surface layers and a core material layer between the two surface layers or is composed of two sandwich surface layers and a core material layer between the two sandwich surface layers, and the core material layer is a fiber-reinforced phenolic light-weight foam layer. The plate disclosed by the invention solves the problem of brittleness of phenolic foam, and the plate is composed of phenolic materials with better flame resistance from inside to outside, so that the flame resistance of the plate is excellent, the plate can resist to high temperature of 150-180 DEG C, the plate strength retention ratio at high temperature is high, and thus fireproof requirements of locomotives can be met. The core material and surface layers of the plate are light materials, so that the light-weight requirement of vehicles can be met. The core material and surface layers of the plate are reinforced by fiber, the fiber in the core material can effectively increase the strength and rigidity of the phenolic foam, and the fiber in the surface layers can effectively increase the strength and rigidity of the phenolic plate, so that the obtained sandwich plate has better strength and rigidity.

Description

technical field [0001] The invention relates to a composite material board, in particular to a light, flame-retardant fiber-reinforced phenolic sandwich board and a preparation method thereof. Background technique [0002] For traffic vehicles, especially high-speed trains, lightweight is very effective in reducing kinetic energy; kinetic energy = 1 / 2mv 2 , so the weight reduction (m reduction) can suppress the brake absorption energy that increases with the increase in speed. For example: if the train speed is increased from 220km / h to 270km / h, if the weight of the car body remains unchanged, the kinetic energy will increase by about 50%; but if the weight of the car body is reduced by 30%, the kinetic energy will only increase by about 5%. The weight of the car body structure of ordinary trains in my country is about 14t, while that of foreign high-speed passenger cars is below 7.5-10t. According to relevant reports, the weight of the vehicle can be reduced by 10%, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B61D17/10B61D17/06B32B27/42B32B27/18B32B27/24B32B27/22B32B5/18B32B27/06B32B27/12B32B5/24B32B27/04B32B33/00B32B37/00B32B38/00B32B38/08C08L61/06C08L29/14C08L39/06C08L71/02C08J9/14
CPCB32B5/245B32B27/18B32B27/22B32B27/24B32B33/00B32B37/00B32B38/00B32B38/08B32B2038/0084B32B2250/40B32B2260/021B32B2260/046B32B2262/00B32B2266/0285B32B2307/3065B32B2307/50B32B2307/54B32B2605/00B61D17/06B61D17/10C08J9/141C08J2361/06C08J2429/14C08L61/06C08L2203/14C08L2205/035C08L29/14C08L39/06C08L71/02
Inventor 陈精明
Owner 常州诺法新材料科技有限公司
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