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A kind of impregnation formula for perforated nomex paper honeycomb and its application method

A technology of paper honeycomb and formula, which is applied in the field of materials, can solve the problems of honeycomb cell wall hole plugging, etc., and achieve the effect of improving efficiency and improving impregnation quality

Active Publication Date: 2018-03-09
THE RES INST FOR SPECIAL STRUCTURES OF AERONAUTICAL COMPOSITE AVIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of plugging holes in the honeycomb cell walls during the impregnation process of the perforated honeycomb, this application adds a defoamer or surface additive to the impregnated glue to reduce the surface tension of the glue, so when the honeycomb core board is removed from the glue tank At this time, the holes on the cell wall of the honeycomb are unobstructed, so not only the impregnation quality of the perforated honeycomb is improved, but also the efficiency of impregnating the perforated honeycomb is improved.

Method used

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  • A kind of impregnation formula for perforated nomex paper honeycomb and its application method

Examples

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Effect test

Embodiment 1

[0019] (1) At room temperature, weigh 1g of BYT-306N silicone surface additive and add it to 100g of honeycomb impregnation glue solution phenolic alcohol varnish, stir and dissolve for later use;

[0020] (2) After the Nomex paper honeycomb core board is cut into strips, holes are drilled in each blank space between the core strip glues perpendicular to the lamination direction. The diameter of the holes can be 0.8mm. (1) Put in the prepared glue solution for 1 min, then extract the honeycomb and turn it over to dry, let it dry for 4 hours, and then put it in an oven for pre-baking before use.

Embodiment 2

[0022] (1) At room temperature, weigh 0.05g BYT-141N silicone defoamer and add it to 100g honeycomb impregnating glue phenolic alcohol varnish, stir and dissolve for later use;

[0023] (2) After the Nomex paper honeycomb core board is cut into strips, a hole is drilled in each blank space between the core strip glue perpendicular to the lamination direction. The diameter of the hole can be 1.5mm. (1) Put the prepared glue in the solution for 5 minutes, then extract the honeycomb and turn it over to dry, let it dry for 8 hours, and then put it in an oven for pre-baking before use.

Embodiment 3

[0025] (1) At room temperature, weigh 0.56g of BYT-066N silicone defoamer and add it to 100g of honeycomb dipping glue phenolic alcohol varnish, stir and dissolve for later use;

[0026] (2) After the Nomex paper honeycomb core board is cut into strips, holes are drilled in each blank space between the core strip glues perpendicular to the lamination direction. The diameter of the holes can be 1.0mm. (1) Put the prepared glue in the solution for 4 minutes, then extract the honeycomb and turn it over to dry for 6 hours, then put it in an oven for pre-baking before use. figure 1 It is a photo of the Nomex paper honeycomb core board after being impregnated with glue. It can be seen from the photo that there are small holes in the honeycomb.

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Abstract

The application belongs to the field of materials and particularly relates to an impregnation formula for punched Nomex paper honeycomb and a use method thereof. A defoamer or a surface additive is added to impregnation glue liquid to reduce surface tension of the glue liquid, so that when a honeycomb core plate is moved out from a glue trough, the holes on walls of the honeycomb lattices are unobstructed. The impregnation formula not only improves impregnation quality of punched honeycomb but also increases efficiency of impregnation of the punched honeycomb.

Description

technical field [0001] The application belongs to the field of materials, and in particular relates to an impregnation formula for perforated Nomex paper honeycomb and its application method. technical background [0002] Nomex paper honeycomb core material is a key component of sandwich structure radomes. For the special purpose of the honeycomb sandwich structure radome, it is necessary to ensure that there is a gas flow channel between the cells of the honeycomb core material formed inside the cover body and the cells, so it is necessary to manufacture a honeycomb core plate with holes on the walls of the honeycomb cells. The diameter of the perforated holes is small, and the use of traditional glue to impregnate the perforated honeycomb is very easy to cause hole blocking, resulting in the inability of the cells and cells of the honeycomb core material to circulate gas, and losing the use of the perforated honeycomb. [0003] When impregnating perforated honeycomb with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/24D21H21/12
CPCD21H21/12D21H21/24
Inventor 高爱娟王雪菲宋延华
Owner THE RES INST FOR SPECIAL STRUCTURES OF AERONAUTICAL COMPOSITE AVIC
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