A foam press-filled honeycomb composite panel and its preparation method

A honeycomb composite panel and foam technology, applied in the field of structural composite materials, can solve the problems of high weight of micro-perforated sound-absorbing panels, difficulty in reducing weight, and short effective service life, and achieve light weight, high foam brittleness, and low production costs Effect

Active Publication Date: 2022-04-19
浙江华江科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the introduction of micro-perforated sound-absorbing panels is helpful to the sound-absorbing performance of the material, the micro-perforated sound-absorbing panels compounded on the surface of the honeycomb panel are easily damaged and the effective service life is short
In addition, the weight of the micro-perforated sound-absorbing panel is heavy, and it is difficult to achieve light weight of this sound-absorbing honeycomb panel

Method used

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  • A foam press-filled honeycomb composite panel and its preparation method
  • A foam press-filled honeycomb composite panel and its preparation method
  • A foam press-filled honeycomb composite panel and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Polyurethane sound-absorbing foam 4 is made by foaming polyol composite material and isocyanate, the weight ratio of polyol composite material and isocyanate is 1:2.1, wherein:

[0042] Each component of polyol composite material is, in parts by weight:

[0043]

[0044]First, add the components of the weighed polyol composition, except for the inorganic filler, into the reaction kettle and stir for 2 hours to obtain a uniform system A. The temperature of the material is controlled at 28°C; the temperature of the isocyanate is controlled at 28°C. Mix system A with inorganic filler firstly, then inject isocyanate and mix evenly for foaming reaction.

[0045] The prepared polyurethane sound-absorbing foam 4 is cut out of a bare board with a specification of 1m*1m*15mm and a cylindrical structural paper honeycomb core of the same specification is stacked between the flat plates of the flat press machine, and the foam board is stacked under the honeycomb core. The metho...

Embodiment 2

[0047] Polyurethane sound-absorbing foam 4 is made of polyol composite material and isocyanate through foaming process, the weight ratio of polyol composite material and isocyanate is 1:1.4, wherein:

[0048] Each component of polyol composite material is, in parts by weight:

[0049]

[0050]

[0051] First, add the components of the weighed polyol composition, except for the inorganic filler, into the reaction kettle and stir for 3 hours to obtain a uniform system A. Control the temperature of the material at 20°C; control the temperature of the isocyanate at 20°C, Mix system A with inorganic filler firstly, then inject isocyanate and mix evenly for foaming reaction.

[0052] The prepared polyurethane sound-absorbing foam 4 is cut out of a bare board with a specification of 1m*1m*20mm and the hexagonal structure paper honeycomb core of the same specification is stacked between the flat plates of the flat press machine, and the foam board is stacked under the honeycomb ...

Embodiment 3

[0054] Polyurethane sound-absorbing foam 4 is made of polyol composite material and isocyanate through foaming process, the weight ratio of polyol composite material and isocyanate is 1:1.65, wherein:

[0055] Each component of polyol composite material is, in parts by weight:

[0056]

[0057] First, add the components of the weighed polyol composition, except the inorganic filler, into the reaction kettle and stir for 2 hours to obtain a uniform system A. Control the temperature of the material at 23°C; control the temperature of the isocyanate at 22°C, Mix system A with inorganic filler firstly, then inject isocyanate and mix evenly for foaming reaction.

[0058] The prepared polyurethane sound-absorbing foam 4 is cut out of a bare board with a specification of 1m*2m*30mm and the hexagonal structure paper honeycomb core of the same specification is stacked between the flat plates of the flat press machine, and the foam board is stacked under the honeycomb core. The meth...

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Abstract

The invention discloses a foam press-filled honeycomb composite board and a preparation method thereof. The composite board consists of a fabric layer, a honeycomb composite core layer and a fabric layer in sequence from top to bottom. The honeycomb composite core layer is made of polyurethane sound-absorbing foam directly It is prepared by pressure filling into the honeycomb core, and the formula of the special polyol composition is 55-70 parts by weight of polyol A; 20-30 parts by weight of polyol B; 8-15 parts by weight of foam embrittlement agent, etc. The foam press-filled honeycomb composite panel adopts the process of press-filling polyurethane sound-absorbing foam to the honeycomb core and then compounding the fabric. The preparation method is simple and easy to operate. The production process has no three-waste pollution, which is safe and environmentally friendly. Embrittlement agent, the foam is brittle and can be quickly and directly pressure-filled into the honeycomb core, one step in place, high production efficiency.

Description

technical field [0001] The invention relates to the field of structural composite materials, in particular to a pressure-resistant, light-weight, sound-absorbing foam press-filled honeycomb composite board and a preparation method. Background technique [0002] Common honeycomb core materials include aramid honeycomb, aluminum honeycomb, polypropylene honeycomb, paper honeycomb, etc. The honeycomb core is a lightweight material with high shear strength perpendicular to the cell expansion direction. Due to its special structure, honeycomb panels have the advantages of high compressive strength and light weight, and are widely used in lightweight products. The application fields include aviation, ships, automobiles, trains, telecommunications, construction and sports equipment, etc. [0003] In the field of application of honeycomb materials, products often require good sound-absorbing performance, which is often difficult to achieve with ordinary honeycomb materials. Patent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B3/08B32B3/12B32B5/18B32B15/14B32B27/20B32B27/12B32B3/24B32B29/02B32B1/06C08G18/48C08J9/00C08L75/08C08K13/02C08K5/053C08K3/34C08K3/26
CPCB32B3/12B32B5/18B32B27/20B32B3/266B32B3/085B32B27/40B32B15/14B32B27/12B32B29/02C08G18/4816C08G18/4829C08G18/4883C08J9/0023C08J9/0066C08J9/0095C08G2350/00C08J2375/08B32B2250/40B32B2266/0278B32B2307/102B32B2266/06C08G2110/0083
Inventor 丁响亮徐钢翁柳燕王亚南刘国旺楼娣
Owner 浙江华江科技股份有限公司
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