Fiberboard with electromagnetic shielding function and preparation method thereof

An electromagnetic shielding and fiberboard technology, which is applied in the field of fiberboard and its preparation, can solve the problems of poor conductivity uniformity of electromagnetic shielding fiberboard, low carbon fiber doping efficiency, and low utilization rate of adhesive, so as to improve the uniformity of sizing and realize high efficiency. The effect of blending and simplifying the raw material processing process

Active Publication Date: 2016-11-16
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both of the above two patents need to apply glue to carbon fiber and wood fiber separately, the glue is relatively large, and the utilization rate of the adhesive is low
In addition, in the process of dispersing and sizing carbon fibers, highly toxic acetone is evenly used as a dispersant for chopped carbon fibers, which not only increases the production cost, but also has great harm
Another defect of this method is that the sizing carbon fiber is difficult to distribute evenly in the fiberboard and form an efficient conductive network, the doping efficiency of carbon fiber is low, the conductive uniformity of the electromagnetic shielding fiberboard is poor, and the electromagnetic shielding performance is low

Method used

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  • Fiberboard with electromagnetic shielding function and preparation method thereof
  • Fiberboard with electromagnetic shielding function and preparation method thereof

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Effect test

Embodiment 1

[0023] In this embodiment, 10mm chopped carbon fiber and miscellaneous wood fiber are mixed and hot-pressed to prepare a fiberboard with electromagnetic shielding function. The specific steps are as follows:

[0024] (1) Place the 10mm chopped carbon fiber and miscellaneous wood fiber in a variable speed mixer according to the mass ratio of 1:10 by the solution blending method and fully stir for 20 minutes to obtain evenly distributed mixed fibers;

[0025] (2) Place the mixed fibers in a blast drying oven and dry until the moisture content is 8% to 12%;

[0026] (3) fully stirring the isocyanate glue and the mixed fiber according to the mass ratio of 1:10 to obtain the sizing mixed fiber;

[0027] (4) Put the sizing mixed fiber in the disperser and fully disperse it for 20 minutes;

[0028] (5) Evenly pave the dispersed sizing mixed fibers in the molding frame, press with a hot press at 160°C and 12MPa for 6 minutes, and obtain a 360mm × 340mm × 3mm electromagnetic shielding...

Embodiment 2

[0032] In this embodiment, 10mm chopped carbon fiber and miscellaneous wood fiber are mixed and hot-pressed to prepare a fiberboard with electromagnetic shielding function. The specific steps are as follows:

[0033] (1) Place the 10mm chopped carbon fiber and miscellaneous wood fiber in a variable speed mixer according to the mass ratio of 1:2 by the solution blending method and fully stir for 30 minutes to obtain evenly distributed mixed fibers;

[0034] (2) Place the mixed fibers in a blast drying oven and dry until the moisture content is 8% to 12%;

[0035] (3) fully stirring the isocyanate glue and the dispersed mixed fiber according to the mass ratio of 1:10 to obtain the sizing mixed fiber;

[0036] (4) Put the sizing mixed fiber in the disperser and fully disperse it for 20 minutes;

[0037] (5) Evenly pave the dispersed sizing mixed fibers in the molding frame, press with a hot press at 160°C and 12MPa for 6 minutes, and obtain a 360mm × 340mm × 3mm electromagnetic ...

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PUM

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Abstract

The invention discloses a fiberboard with electromagnetic shielding function and a preparation method thereof, belonging to the field of electromagnetic shielding composite materials. The fiberboard with electromagnetic shielding function involved in the invention is prepared by uniformly mixing chopped carbon fibers and wood fibers, applying glue and hot pressing. The preparation method is to prepare the fiberboard with electromagnetic shielding function through a series of processes such as preparation of mixed fiber by solution blending method, sizing of mixed fiber, dispersion treatment of sizing mixed fiber, uniform paving of fiberboard and hot pressing compound. The invention solves the problem that the chopped carbon fiber is difficult to distribute evenly in the fiberboard, effectively improves the uniform distribution degree of the chopped carbon fiber, realizes the high-efficiency doping of the carbon fiber, and solves the problem of poor conductivity uniformity and low electromagnetic shielding efficiency of the electromagnetic shielding fiberboard problem. In addition, the fiberboard with electromagnetic shielding function provided by the invention realizes the dispersion and uniform mixing of wood fiber and carbon fiber in the same preparation process, and the composite process is simple and easy to operate.

Description

technical field [0001] The invention relates to a fiberboard with electromagnetic shielding function and a preparation method thereof. The fiberboard with electromagnetic shielding function prepared by the method can be used in the field of electromagnetic shielding composite materials. Background technique [0002] Filled wood-based electromagnetic shielding fiberboard is an electromagnetic shielding composite material composed of conductive filler and wood fiber. Its performance mainly depends on the nature, dosage, shape and distribution of the filling material (conductive, magnetic), the choice of composite process, etc. At present, the conductive fillers commonly used in filled electromagnetic shielding composite materials are graphite, carbon black, metal fibers, etc. When adding conductive particles, additives such as active agents and coupling agents need to be used. The preparation process is complicated and the economic cost is high; the preparation of metal fibers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N3/04B27N3/08B27N1/02
Inventor 傅峰卢克阳侯俊峰
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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