Radar cover protective film

Abstract

The invention relates to the technical field of radome protective films, in particular to a radome protective film which comprises a radome protective film body, the radome protective film body is made of an aviation-grade tough polymer thermoplastic polyurethane film and a high-performance acrylic acid pressure-sensitive adhesive, and the radome protective film body is finally made through a plastic uptake technology. The radome protective film is prepared from the aviation-grade tough polymer thermoplastic polyurethane film and the high-performance acrylic pressure-sensitive adhesive, the thermoplastic polyurethane film has the characteristics of high tension, high tensile force, toughness and aging resistance and is a mature environment-friendly material, and the acrylic pressure-sensitive adhesive has better low-temperature resistance, high-temperature resistance and high-temperature resistance, so that the radome protective film is suitable for being used as a radome protective film. The adhesive has the advantages of high adhesive force, low volatile matter condensation rate and low mass loss rate, is puncture-resistant, wear-resistant, scratch-resistant, wind erosion-resistant and rain erosion-resistant, has very strong toughness, has good adhesion to a curved surface, is ultraviolet-resistant for a long time, is free of a solvent technology, is simple and quick to construct, can be dry-adhered or wet-adhered, can be prepared into a preformed protective sleeve, and is used for protecting the surface of a workpiece with a complex molded surface.

Description

Technical Field

[0001] The invention relates to the technical field of radome protective films, in particular to a radome protective film. Background Art

[0002] The radome is an important component of an aircraft. It is used on all aircraft equipped with radars. It is usually located at the head or back of the aircraft, such as the conical radome on the nose of a fighter aircraft, the turntable radome on the back of an early warning aircraft, the hemispherical radome on a transport aircraft, and the "nose" radome on the nose of a civil aircraft.

[0003] However, the existing radome protective film is affected by high-speed airflow for a long time, which may cause the radome surface to be damaged by rain, moisture, UV light, insects, sand, hail, snow, and other air particles, thus affecting the normal use of the radome. Summary of the invention

[0004] The object of the present invention is to provide a radome protective film to solve the problem that the surface is easily damaged as mentioned in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a radome protective film, comprising:

[0006] The radome protective film is made of aviation-grade tough polymer thermoplastic polyurethane film and high-performance acrylic pressure-sensitive adhesive, and the radome protective film is finally made through a blister process.

[0007] Preferably, the radome protective film should have a smooth surface without obvious defects such as crystal points, spots, indentations, inclusions, bubbles, protrusions, etc., and the dimensional error of the radome protective film should not exceed 5 mm.

[0008] Preferably, the adhesive thickness of the radome protective film is 0.45 mm, and the error is no more than 0.035 mm.

[0009] Preferably, the surface density of the radome protective film is 530 g / m 2 , and the error is no more than 30g / m 2 .

[0010] Preferably, the average tensile strength of the radome protective film is not less than 40 MPa.

[0011] Preferably, the elongation at break of the radome protective film is not less than 400%, and the average value of the tear strength of the radome protective film is not less than 40N.

[0012] Preferably, the peel strength of the radome protective film is a 180° bonding strength.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The new radar cover protective film is made of aviation-grade tough polymer thermoplastic polyurethane film and high-performance acrylic pressure-sensitive adhesive. Thermoplastic polyurethane film not only has the characteristics of high tension, high tensile force, strength and aging resistance, but is also a mature environmentally friendly material. Acrylic pressure-sensitive adhesive has good low-temperature resistance and high-temperature resistance, low condensable volatiles and mass loss rate. It has the advantages of puncture resistance, wear resistance, scratch resistance, wind erosion resistance, rain erosion resistance, very strong toughness, good adhesion to curved surfaces, long-term UV resistance, solvent-free technology, simple and fast construction, can be dry-applied or wet-applied, and can be made into pre-formed protective covers for surface protection of parts with complex surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A flow chart for making a protective film of the present invention;

[0016] Figure 2 The present invention is a flow chart of manufacturing the radar cover protective film. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-2 , an embodiment provided by the present invention: a radar cover protective film.

[0019] Including: a radome protective film, which is made of aviation-grade tough polymer thermoplastic polyurethane film and high-performance acrylic pressure-sensitive adhesive. Thermoplastic polyurethane film not only has the characteristics of high tension, high tensile force, strength and aging resistance, but is also a mature environmentally friendly material. Acrylic pressure-sensitive adhesive has good low-temperature resistance, high-temperature resistance, low condensable volatiles and mass loss rate, and no harmful gas escape. The radome protective film is finally made through the blister process.

[0020] Preferably, the radome protective film should have a smooth surface without obvious defects such as crystal points, spots, indentations, inclusions, bubbles, protrusions, etc., to ensure a certain aesthetics and performance. The dimensional error of the radome protective film is no more than 5 mm.

[0021] Preferably, the adhesive thickness of the radome protective film is 0.45 mm, and the error is no more than 0.035 mm, ensuring a certain quality and tensile strength.

[0022] Preferably, the surface density of the radome protective film is 530 g / m 2 , and the error is no more than 30g / m 2 , areal density is the mass per unit area of ​​a substance of a specified thickness.

[0023] Preferably, the average tensile strength of the radome protective film is not less than 40 MPa. Tensile strength generally refers to tensile strength, which is the critical value for the transition of metal from uniform plastic deformation to local concentrated plastic deformation, and is also the maximum bearing capacity of metal under static tensile conditions.

[0024] Preferably, the elongation at break of the radome protective film is not less than 400%, and the average value of the tear strength of the radome protective film is not less than 40N, where the tear strength refers to the force required to tear a thin sample.

[0025] Preferably, the peel strength of the radome protective film is a 180° bonding strength, and the bonding strength is the mutual attraction between adjacent parts within the same substance, and this mutual attraction is a manifestation of the molecular force between molecules of the same substance.

[0026] Working principle: When using, first test the thermoplastic polyurethane film. After reaching the standard, apply acrylic pressure-sensitive adhesive on the surface of the thermoplastic polyurethane film. After cutting the thermoplastic polyurethane film, let it stand for a period of time, apply acrylic pressure-sensitive adhesive on the surface of the thermoplastic polyurethane film again, let it stand for a period of time, test the finished product, and then package it. When making the radar cover protective film, start the machine to load the material, clamp it, use positive and negative air pressure to shape it, use a practical variable frequency motor to send it out, cut off the waste edge material, and finally use a conveyor belt to send the product out. The above is the entire working principle of the present invention.

[0027] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A radome protective film, characterized in that: include: The radome protective film is made of aviation-grade tough polymer thermoplastic polyurethane film and high-performance acrylic pressure-sensitive adhesive, and the radome protective film is finally made through a blister process.

2. The radome protective film according to claim 1, characterized in that: The appearance of the radar cover protective film should be smooth, without obvious defects such as crystal points, spots, indentations, inclusions, bubbles, protrusions, etc., and the dimensional error of the radar cover protective film should not exceed 5mm.

3. The radome protective film according to claim 1, characterized in that: The adhesive thickness of the radar cover protective film is 0.45mm, and the error is no more than 0.035mm.

4. The radome protective film according to claim 1, characterized in that: The surface density of the radome protective film is 530g / m 2 , and the error is no more than 30g / m 2 .

5. The radome protective film according to claim 2, characterized in that: The average tensile strength of the radome protective film is not less than 40 MPa.

6. The radome protective film according to claim 3, characterized in that: The breaking elongation of the radome protective film is not less than 400%, and the average value of the tear strength of the radome protective film is not less than 40N.

7. The radome protective film according to claim 4, characterized in that: The peel strength of the radar cover protective film is a 180° bonding strength.

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