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Paper honeycomb core material soaking material and application thereof

A technology of impregnating material and paper honeycomb, applied in paper coating, pulp raw material addition process, paper, etc., can solve the problems of small molecular weight of phenolic resin prepolymer, reduce product production efficiency, increase production cost, etc., and achieve high compressive strength And shear strength, improve production efficiency, improve the effect of compressive strength

Inactive Publication Date: 2018-09-11
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small molecular weight and low viscosity of the phenolic resin prepolymer, when it is necessary to produce high-density aramid paper honeycomb, it is necessary to carry out the process of impregnation-draining-desolventization-post-curing and repeat 2-6 times, which greatly reduces the cost. The production efficiency of the product increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this embodiment, the cell size of the prepared core material is 3.2mm, and the nominal density of the core material is 48kg / m 3 The aramid paper honeycomb core material, the specific preparation method is as follows:

[0030] (1) 95 parts of phenolic resin, 5 parts of epoxy resin E44, and 0.1 part of catalyst boron trifluoride etherate complex are configured into an impregnating material with a solid content of 60wt% (ethanol is a solution), stirred until uniformly mixed, and added to In the resin pool, and placed in a constant temperature oven, the parts mentioned in this step refer to parts by mass.

[0031] (2) Immerse the prefabricated aramid paper honeycomb with a cell size of 3.2mm into the impregnating material, raise the temperature of the oven to 60°C, and keep it warm for 0.5 hours, so that the epoxy resin undergoes a ring-opening reaction, that is, pre-curing occurs.

[0032] (3) Take the aramid paper honeycomb impregnated with the pre-cured resin out of ...

Embodiment 2

[0038] In this embodiment, the cell size of the core material is 4.8mm, and the nominal density of the core material is 48kg / m 3 The aramid paper honeycomb core material, the specific preparation method is as follows:

[0039] (1) 95 parts of phenolic resin, 5 parts of epoxy resin E44, and 0.1 part of catalyst boron trifluoride etherate complex are configured into an impregnating material with a solid content of 60wt% (ethanol is a solution), stirred until uniformly mixed, and added to In the resin pool, and placed in a constant temperature oven, the parts mentioned in this step refer to parts by mass.

[0040] (2) Immerse the prefabricated aramid paper honeycomb with a cell size of 4.8mm into the impregnating material, raise the temperature of the oven to 60°C, and keep it warm for 1 hour, so that the epoxy resin undergoes a ring-opening reaction, that is, pre-curing occurs.

[0041] (3) Take the aramid paper honeycomb impregnated with the pre-cured resin out of the resin po...

Embodiment 3

[0047] In this embodiment, the cell size of the prepared core material is 4.8mm, and the nominal density of the core material is 64kg / m 3 The aramid paper honeycomb core material, the specific preparation method is as follows:

[0048] (1) 90 parts of phenolic resin, 10 parts of epoxy resin E51, and 0.2 parts of catalyst boron trifluoride etherate complex are configured into an impregnating material with a solid content of 60wt% (ethanol is a solution), stirred until uniformly mixed, and added to In the resin pool, and placed in a constant temperature oven, the parts mentioned in this step refer to parts by mass.

[0049] (2) Immerse the prefabricated aramid paper honeycomb with a cell size of 4.8mm into the impregnating material, raise the temperature of the oven to 60°C, and keep it warm for 2 hours, so that the epoxy resin undergoes a ring-opening reaction, that is, pre-curing occurs.

[0050] (3) Take the aramid paper honeycomb impregnated with the pre-cured resin out of th...

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Abstract

The invention relates to a paper honeycomb core material soaking material and application thereof. The soaking material is prepared from phenolic resin, epoxy resin, catalysts and solvents, and is used for preparing high-intensity aramid fiber paper honeycombs. Through the selection on the epoxy resin and the catalysts, the epoxy resin takes ring opening reaction with the phenolic resin at the lowtemperature; by regulating the pre-curing temperature, the pre-curing time or the epoxy resin content, the molecular weight and the viscosity of oligomers in the impregnating material are controlled,so that the adsorption quantity of the resin on the aramid fiber paper honeycombs is controlled; after the solvent removal and curing, the aramid fiber paper honeycomb core materials with the specific density is obtained; the repeated soaking-solvent removal-curing step is avoided; the production efficiency is greatly improved; the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of impregnating materials and applications, in particular to a paper honeycomb core material impregnating material and its application. Background technique [0002] Aramid paper honeycomb is a non-metallic lightweight core material made of aramid paper through a series of complicated processes. Due to the unique excellent characteristics of aramid paper itself, aramid paper honeycomb has unique excellent properties such as light weight, high strength, flame retardancy, sound insulation and heat insulation, and is widely used in aerospace and rail transportation. [0003] Since the aramid paper itself is a flexible material, in the paper honeycomb manufacturing process, the paper honeycomb obtained by gluing and stretching must be impregnated with a rigid resin and cured to provide the plane compressive strength and lateral shear strength of the sandwich panel. . At present, phenolic resin is used as the impregnatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/16D21H19/24D21H23/32D21H21/18C08L61/06C08L63/00
CPCC08L61/06D21H19/16D21H19/24D21H21/18D21H23/32C08L63/00
Inventor 王彦胡祖明马玉梅于俊荣尚建勋诸静
Owner DONGHUA UNIV