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Wave-absorbing adhesive patch of missile wing and preparation method of wave-absorbing adhesive patch of missile wing

A wave-absorbing patch and elastic wing technology, which is applied in the direction of electrical components, magnetic field/electric field shielding, etc., can solve the problems of material fracture, small curvature radius of the front edge of the elastic wing, cracks, etc., and achieve the effect of improving mechanical properties

Inactive Publication Date: 2018-02-23
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that if the flexibility of the material is insufficient (low elongation at break) or the radius of curvature of the leading edge of the wing is small, the material will break and cracks will occur

Method used

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  • Wave-absorbing adhesive patch of missile wing and preparation method of wave-absorbing adhesive patch of missile wing
  • Wave-absorbing adhesive patch of missile wing and preparation method of wave-absorbing adhesive patch of missile wing
  • Wave-absorbing adhesive patch of missile wing and preparation method of wave-absorbing adhesive patch of missile wing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: comparative example

[0029] The wave-absorbing patch adopts a room temperature curing process, and the ingredients are prepared according to the following materials and their proportions:

[0030]

[0031] Get three containers, respectively marked as A and B, and C, respectively weigh prepolymer, slurry (comprising clear glue and red glue) and absorbent. Take about 1 / 2 of the absorbent (basin C) into the container of component A, pour a cup of dispersant into it, and initially stir it into a uniform paste premix; put the remaining about 1 / 2 of the absorbent into component A In the container of B, pour another cup of dispersant, and also initially stir it into a uniform paste premix.

[0032] Turn on the power switch of the three-roller machine and the cooling water faucet switch, pour the component A paste premix between rollers 1 and 2, flow into the receiving container along the scraper, and use a painter's scraper to shovel all the mixture on the s...

Embodiment 2～6

[0035] The wave-absorbing patch adopts a thermal vulcanization molding process, and the raw material composition and component distribution ratio are shown in Table 2:

[0036] Table 2 Embodiment 2~6 formula table

[0037]

[0038] The preparation method of the above-mentioned embodiment 2-6 wave-absorbing patch mainly includes the following steps:

[0039]Weigh according to the formula, put the weighed polyurethane raw rubber into the feeding port above the two rollers on the open mill to break the rubber into pieces, and then gradually add the weighed stearic acid for plastication; weigh and mix by hand Good carbonyl iron powder (including coupling agent and antioxidant) is gradually added to the feeding port, adjust the roller distance, and continue to mix; take out the mixed film and put it in a clean tray to cool for more than 30 minutes; adjust the roller distance to cool the finished product Put the above-mentioned rubber into the feeding port, let it cover the roll...

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Abstract

The invention belongs to the field of electromagnetic wave absorption materials and particularly relates to a wave-absorbing adhesive patch of a missile wing and a preparation method of the wave-absorbing adhesive patch of the missile wing. The wave-absorbing adhesive patch for the missile wing uses a polyurethane rubber system and a pie carbonyl iron-based magnetic metal absorbent as main raw material components and is prepared by adopting a heat vulcanization forming process. A coupling agent and an antioxidant are added into the absorbent. The wave-absorbing adhesive patch is suitable for Xand Ku wave bands (8-18 GHz). The density of the adhesive patch is more than 5% lower than that of a traditional stealth adhesive patch. The mean reflectance of radar waves in the X and Ku wave bandsis decreased by 6% or above. Mechanical properties, such as the tensile strength and the elongation at break, of the wave-absorbing adhesive patch are dramatically improved.

Description

technical field [0001] The invention belongs to the field of electromagnetic wave absorbing materials, and in particular relates to an X- and Ku-band wave-absorbing patch for bomb wings and a preparation method thereof. Background technique [0002] The stealth patch is a sheet-shaped elastomeric wave-absorbing material, which is made of rubber-filled radar wave absorbers. It is generally bonded to weapons and equipment with special adhesives. Its main function is to reduce the radar cross section (RCS) of weapons and equipment. , improve the stealth performance of weapons and equipment, and then improve the survival and penetration capabilities. With the development of weapons and equipment, the requirements for the mechanical and electrical properties of materials are getting higher and higher. figure 1 It is a schematic diagram of the strain of the stealth patch material under actual use conditions, where A is a schematic diagram of the radius of curvature of the leading...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08K13/06C08K9/06C08K3/18C08K5/14C08K5/18C08K5/09H05K9/00
CPCH05K9/0081C08K3/18C08K5/09C08K5/14C08K5/18C08K9/06C08K13/06C08L2201/08C08L75/08
Inventor 顾兆栴陈乐张明雪
Owner NANJING UNIV