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Radome TPU protective film

A technology of protective film and radome, applied in the direction of film/sheet adhesives, adhesives, etc., can solve the problems of radome structural performance and electrical performance degradation, easy generation of static electricity on the radome surface, affecting radio wave transmission, etc. No glue residue VOA emission, good performance, not easy to slip off

Pending Publication Date: 2021-12-24
上海自图新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Affected by high-speed airflow and atmospheric ionosphere for a long time, it will easily generate static electricity on the surface of the radome. When the static electricity accumulates to a certain extent, it will cause discharge, interfere with electronic equipment, and affect radio wave transmission.
Coupled with the erosion of wind, sand, rain, snow, ultraviolet rays, birds, etc., the structural performance and electrical performance of the radome will decline
In the past, it was dismantled during regular inspections for grinding and repairing. When the scheduled inspection was short or required to be processed after the flight, it was often impossible due to insufficient construction conditions. A period of time caused new shedding, this problem has been plagued by maintenance personnel

Method used

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  • Radome TPU protective film

Examples

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Effect test

preparation example Construction

[0034] The preparation method of TPU composite layer specifically comprises the following steps:

[0035] (1) The thermoplastic polyurethane elastomer is controlled by a two-stage dehumidification dryer to control the moisture content of the TPU to less than 300ppm, and then the conventional injection molding, extrusion, blow molding or calendering process is performed to prepare the TPU layer, and the thickness is controlled at 125μm;

[0036] (2) Use organosilicon resin as film-forming resin, the amount of aluminum silver paste is 10-15wt%, the amount of mica powder is 12-15wt%, mix evenly through a mixer, and then pass through a two-stage dehumidification dryer to control the moisture below 300ppm, and then pass Film forming by conventional injection molding, extrusion, blow molding or calendering;

[0037] (3) Nano filler TiB 2 The mass ratio with TiC is 1:2, TiB 2 -The proportion of TiC is 4wt%, supplemented by silicone resin, mixed evenly by a mixer, and then controlle...

Embodiment 1

[0042] A TPU protective film for aircraft radome, which includes a release layer, a UV adhesive layer, a TPU composite layer, and an antistatic TPU layer from bottom to top. The thickness of the release layer is 1 μm, and the thickness of the UV adhesive layer is 10 μm. , the antistatic polyurethane layer is based on polyether polyurethane elastomer as the carrier, adding 10% thermoplastic conductive filler masterbatch Nano-Force S by mass, diluting and mixing TPU evenly, and then extruding to prepare the antistatic polyurethane layer, the thickness The antistatic polyurethane layer is directly coated on one surface of the TPU composite layer; the UV adhesive layer is coated on the release layer, and then heated and cured by UV light. The UV adhesive layer has a strong adhesion before UV light. Heli, after UV light, has a strong sticking force, it is not easy to slip off after being attached to the surface of the radome, and it is easy to peel off from the surface of the radome...

Embodiment 2

[0054] A TPU protective film for aircraft radome, which includes a release layer, a UV adhesive layer, a TPU composite layer, and an antistatic TPU layer from bottom to top. The thickness of the release layer is 2 μm, and the thickness of the UV adhesive layer is 12 μm. , the antistatic polyurethane layer is based on polyether polyurethane elastomer as a carrier, adding 15% thermoplastic conductive filler masterbatch Nano-Force S by mass, diluting and mixing TPU evenly, and then extruding to prepare an antistatic polyurethane layer with a thickness of The antistatic polyurethane layer is directly coated on one surface of the TPU composite layer; the UV adhesive layer is coated on the release layer, and then heated and cured by UV light. The UV adhesive layer has a strong adhesion before UV light. Heli, after UV light, has a strong sticking force, it is not easy to slip off after being attached to the surface of the radome, and it is easy to peel off from the surface of the rado...

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Abstract

The invention discloses a radome TPU protective film which sequentially comprises a UV bonding layer, a TPU composite layer and an antistatic polyurethane layer from bottom to top, and the TPU composite layer is sequentially coated with a TPU substrate layer, a first organic silicon composite layer, a second organic silicon composite layer and a third organic silicon composite layer from bottom to top. The first organic silicon composite layer comprises organic silicon resin as well as aluminum paste and mica powder which are doped in the organic silicon resin, the second organic silicon composite layer comprises organic silicon resin as well as TiB2 and TiC which are doped in the organic silicon resin, and the third organic silicon composite layer comprises organic silicon modified acrylic resin as well as SiO2 and TiO2 which are doped in the organic silicon modified acrylic resin. The protective film disclosed by the invention is pasted on the surface of the radome, the UV bonding layer and the radome have a strong bonding degree, and the protective film is easy to replace without residual glue; the TPU composite layer has high erosion resistance, repairable performance and antifouling performance; and the antistatic polyurethane layer has conductive capability, so that accumulation of static electricity on the radome can be avoided, and comprehensive protection of the radome is realized.

Description

technical field [0001] The invention belongs to the technical field of aircraft radome protective films, in particular to a radome TPU protective film. Background technique [0002] The radome is an important part of the aircraft. Since the S-band radome produced by Western Electric Company was installed on the B-18A aircraft, all radar-equipped aircraft use the radome, which is generally located on the head or back of the aircraft. Such as the cone-shaped radome on the nose of a fighter jet, the turntable radome on the back of an early warning aircraft, the hemispherical radome on a transport aircraft, and the "nose"-shaped radome on the nose of a civilian aircraft. [0003] Affected by high-speed airflow and atmospheric ionosphere for a long time, it will easily generate static electricity on the surface of the radome. When the static electricity accumulates to a certain extent, it will cause discharge, interfere with electronic equipment, and affect radio wave transmissio...

Claims

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Application Information

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IPC IPC(8): C09J7/29C08J5/18C08L75/08C08L83/04C08L33/00C08K3/08C08K3/34C08K3/38C08K3/14C08K3/36C08K3/22
CPCC09J7/29C08J5/18C09J2301/122C09J2301/16C09J2301/314C09J2475/006C09J2483/006C09J2433/006C09J2301/41C08K2201/011C08K2003/0812C08K3/34C08K3/38C08K3/14C08K3/36C08K2003/2241C08J2375/08C08J2383/04C08J2333/04
Inventor 董秀莲张欣戎李亚兵于锦
Owner 上海自图新材料科技有限公司
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