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Heat and sound insulation cotton felt for large aircraft

A technology of heat insulation and sound insulation, large aircraft, applied in the direction of fuselage insulation, etc., can solve the problems of being susceptible to moisture and affecting performance, and achieve the effect of excellent hydrophobicity and improved hydrophobicity.

Pending Publication Date: 2022-04-22
ZHEJIANG OUREN NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing thermal and sound insulation modules are prone to moisture for a long time, which affects their performance and needs further improvement

Method used

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  • Heat and sound insulation cotton felt for large aircraft
  • Heat and sound insulation cotton felt for large aircraft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~4

[0029] Embodiments 1 to 4: A heat-insulating and sound-insulating cotton blanket for a large aircraft, which is formed by curing and drying glass fibers sprayed with an adhesive;

[0030] The adhesive is composed of the following components by weight, as shown in Table 1:

[0031] Table 1

[0032] ;

[0033] Described modified phenolic resin solution obtains through the following steps:

[0034] Step 1. Formaldehyde is added to the mixture composed of phenol, xylenol, and lignin, and reacted at a temperature of 40-60°C to obtain the first solution. The weight ratio of phenol, xylenol, and lignin is 10 :2~4:1~8;

[0035] Step 2. Add sodium hydroxide aqueous solution to the first solution to adjust the pH of the first solution to 8~9, and raise the temperature to 75~85°C for 1~2h, then cool down to 35~50°C, add sulfuric acid and stir obtaining a second solution;

[0036] Step 3, adding hexamethylol melamine in 3 equal batches to the second solution to obtain the modified ...

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PUM

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Abstract

The invention discloses a heat-insulation and sound-insulation cotton felt for a large aircraft. The cotton felt is formed by curing and drying glass fibers sprayed with an adhesive. The adhesive is prepared from the following components in parts by weight: a phenolic resin solution, an organic silicon modified methyl methacrylate prepolymer solution, water, pentaerythritol, methyl emulsified silicone oil and dioctyl phthalate, and the phenolic resin solution is obtained by the following steps: adding a sodium hydroxide aqueous solution into a first solution to adjust the pH value of the first solution to be 8-9; adding sulfuric acid and stirring to obtain a second solution; hexamethylol melamine is added into the second solution in batches, and the phenolic resin solution is obtained. The hydrophobic performance of the heat insulation and sound insulation module is improved, the contact angle of the glass fiber cotton felt reaches 143 degrees, the hydrophobic rate of the glass fiber cotton felt reaches 99%, and the hydrophobic performance is excellent.

Description

technical field [0001] The invention relates to the field of heat and sound insulation, in particular to a heat and sound insulation cotton felt for large aircraft. Background technique [0002] A sound-insulating and insulating airtight bag is installed between the interior trim layer of the passenger cabin and the skin of the fuselage in commercial large aircraft. The material has the functions of heat insulation, sound insulation, flame retardancy and insulation. Aircraft inner wall sealing bag is prepared by filling glass fiber felt into the film bag, and then ultrasonically heat-sealing the film bag body. The existing thermal and sound insulation modules are susceptible to moisture for a long time, which affects their performance, and need further improvement. Contents of the invention [0003] The purpose of the present invention is to provide a kind of thermal and sound insulation cotton felt for large aircraft. While maintaining the resilience of the glass fiber w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08L43/04C08L83/04C08K5/053C08K5/12C08K7/14B64C1/40
CPCC08L61/14B64C1/40C08L2205/03C08L43/04C08L83/04C08K5/053C08K5/12C08K7/14
Inventor 夏厚君涂大记杨晓明潘华周钰明卜小海张泽武
Owner ZHEJIANG OUREN NEW MATERIALS CO LTD
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