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Prepreg compound and method for preparing honeycomb core through prepreg compound

A technology of prepreg and honeycomb core, which is applied in the field of honeycomb core, can solve serious problems such as uneven glue coating and less glue at the glue strip, and achieve the effects of easy large-scale production, simple preparation method, and good adhesion

Active Publication Date: 2017-06-20
杭州铠恒新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Glass cloth cannot be deformed under the tension of winding like aramid paper. We generally use plain glass cloth to prepare the honeycomb core, which will lead to more serious deformation
[0008] ③When the pressure roller presses the joint, if the viscosity of the resin is too low, the glue will be pressed out of the other rubber strips during pressing, resulting in less glue at the rubber strip. If the viscosity is too high, the glue will be unevenly applied when the glue is applied. It will also cause the situation of each bonding point to be different, which may cause local honeycombs to be unable to be pulled apart.
[0011] The method of using benzoxazine resin to prepare prepreg and preparing glass cloth honeycomb core from the prepreg has not been reported yet

Method used

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  • Prepreg compound and method for preparing honeycomb core through prepreg compound
  • Prepreg compound and method for preparing honeycomb core through prepreg compound
  • Prepreg compound and method for preparing honeycomb core through prepreg compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Preparation of prepreg

[0054] Add 1 part of release agent to 100 parts of phenol-diaminodiphenylmethane type benzoxazine at 120° C., mix well to prepare a benzoxazine resin system mixture.

[0055] At 120°C, using a melting normal thickness of 0.1mm and a density of 100m 2 Impregnate the benzoxazine resin system mixture on the glass cloth of warp yarn 16 and weft yarn 15 to obtain the prepreg, control the content of the benzoxazine resin system in the prepreg after dipping to be 42wt% .

[0056] (2) Preparation of honeycomb core

[0057] like figure 1 Shown is a schematic flow chart of the preparation method of the honeycomb core. The preparation method of described honeycomb core comprises the steps:

[0058] I, the prepreg 1 (multi-layer) is laid between two protruding molds 2, such as figure 1 As shown in (a), apply a pressure of 0.5 MPa to the mold, mold it at 120°C for 1 hour, and get out of the semi-regular hexagonal corrugated structure honeycomb pane...

Embodiment 2

[0063] The preparation of the prepreg and the preparation of the honeycomb core were the same as in Example 1, except that the size of the mold was adjusted to prepare a honeycomb core with a honeycomb aperture of 9.6 mm. The test results of density and mechanical properties are shown in Table 1.

Embodiment 3

[0065] (1) Preparation of prepreg

[0066] Add 1 part of release agent and 10 parts of aluminum hydroxide to 100 parts of bisphenol A-aniline benzoxazine at 120° C., mix well to prepare a benzoxazine resin system mixture.

[0067] At 120°C, using a melting normal thickness of 0.1mm and a density of 100m 2 Impregnate the benzoxazine resin system mixture on the glass cloth of warp yarn 16 and weft yarn 15 to obtain the prepreg, control the content of the benzoxazine resin system in the prepreg after dipping to be 45wt% .

[0068] (2) Preparation of honeycomb core

[0069] like figure 2 Shown is a schematic flow chart of the preparation method of the honeycomb core. The preparation method of described honeycomb core comprises the steps:

[0070] I, the prepreg 1 (multi-layer) is laid between two protruding molds 2, such as figure 2 As shown in (a), apply a pressure of 0.5 MPa to the mold, mold it at 120°C for 1 hour, and get out of the semi-regular hexagonal corrugated st...

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Abstract

The invention relates to a prepreg compound and a method for preparing a honeycomb core through the prepreg compound. The prepreg compound is prepared from a benzoxazine resin system and glass cloth through a melting method, wherein the benzoxazine resin system comprises benzoxazine, a release agent, an optional filler and an optional curing agent. When the honeycomb core is prepared through the prepreg compound provided by the invention, the method comprises the steps of pressing the prepreg compound into repetitive semi-regular hexagon ripple structure honeycomb panels, which are connected at interval, by adopting compression molding, and then curing every two repetitive semi-regular hexagon ripple structure honeycomb panels which are connected at interval and are opposite in a concave-convex way to form a preformed honeycomb core with two coincided and cohesive sides; further curing the preformed honeycomb core to obtain the honeycomb core. The method provided by the invention has the advantages of simple forming, low cost, and easiness for large-scale production, and the prepared honeycomb core has favorable flame retardant property and favorable mechanical property.

Description

technical field [0001] The invention belongs to the technical field of honeycomb cores, and in particular relates to a prepreg and a method for preparing honeycomb cores therefrom. Background technique [0002] The honeycomb sandwich structure is a widely used sandwich structure. The honeycomb structure is widely used for its light weight and high strength. Honeycomb cores are divided into aluminum honeycomb cores, glass cloth honeycomb cores, aramid paper honeycomb cores, etc. according to their materials. Due to the different materials used, their performance characteristics are also different. [0003] Aramid paper honeycomb, due to the high price of aramid paper, the cost of aramid paper honeycomb is high, and the high price makes its application scope limited to special fields such as aviation and military industry. The price of aluminum honeycomb is much cheaper than that of aramid paper honeycomb, but the strength of the same specification will be slightly worse. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08K3/22C08J5/24B29C67/20
CPCB29C67/20C08J5/24C08J2379/04C08K3/22C08K2003/2224C08K2003/2227C08L79/04C08L2201/02
Inventor 刘瑞瑞蔡徐伟龚春飞
Owner 杭州铠恒新材料有限公司
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