CN110356071B - Invisible composite material forming process and application - Google Patents

Invisible composite material forming process and application Download PDF

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Publication number
CN110356071B
CN110356071B CN201810318322.9A CN201810318322A CN110356071B CN 110356071 B CN110356071 B CN 110356071B CN 201810318322 A CN201810318322 A CN 201810318322A CN 110356071 B CN110356071 B CN 110356071B
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alkali
layers
glass fiber
free glass
prepreg cloth
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CN110356071A (en
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宋庆祥
张力存
曲学功
崔宏伟
宋福建
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Shandong Grad Group Co Ltd
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Shandong Grad Group Co Ltd
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    • B32B15/02—Layer formed of wires, e.g. mesh
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
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    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H3/00—Camouflage, i.e. means or methods for concealment or disguise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
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    • F41H5/02—Plate construction
    • F41H5/04—Plate construction composed of more than one layer
    • F41H5/0471—Layered armour containing fibre- or fabric-reinforced layers
    • F41H5/0478—Fibre- or fabric-reinforced layers in combination with plastics layers
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    • B32B2571/00—Protective equipment
    • B32B2571/02—Protective equipment defensive, e.g. armour plates, anti-ballistic clothing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)
  • Reinforced Plastic Materials (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

The invention belongs to the technical field of composite materials, and particularly relates to a stealth composite material which sequentially comprises the following components from outside to inside: the wave absorbing material is formed by bonding layers of a polyurea protective layer (1), two layers of alkali-free glass fiber epoxy prepreg cloth (2, 3), an aramid fiber honeycomb wave absorbing plate (4), two layers of alkali-free glass fiber epoxy prepreg cloth (5, 6), a 120-mesh copper screen (7) and two layers of alkali-free glass fiber epoxy prepreg cloth (8, 9).

Description

Invisible composite material forming process and application
Technical Field
The invention belongs to the technical field of composite materials, and particularly relates to a stealth material;
background
In modern wars, stealth techniques have been developed in order to more effectively "preserve oneself, eliminate enemies". The method is applied to the development of various stealth weapons such as stealth airplanes, stealth missiles, stealth tanks, stealth ships and the like, and some stealth weapons are successfully developed and put into battlefields for use. With the development and application of stealth technology, more and more various stealth weapons will appear on the battlefield in the future. The method can greatly improve the survivability, the penetration capability and the combat efficiency of the weapon equipment, break through the formed attack and defense balance and promote various detection systems in a defense system to have great revolution. The patent provides a forming process and application of a stealth composite material, which is applied to a hub cover of a military combat tank at present to play a role in stealth protection;
disclosure of Invention
The technical scheme of the invention is as follows:
a stealth composite material is characterized by comprising the following components in sequence from outside to inside: the polyurea protective layer (1), the alkali-free glass fiber epoxy prepreg cloth (2, 3), the aramid fiber honeycomb wave absorbing plate (4), the alkali-free glass fiber epoxy prepreg cloth (5, 6), the 120-mesh copper screen (7) and the alkali-free glass fiber epoxy prepreg cloth (8, 9) are bonded together.
Further, the thickness of the polyurea protective layer (1) is 0.9-1.1 mm, the single-layer thickness of the two layers of alkali-free glass fiber epoxy prepreg cloth (2, 3) is 0.2mm, the thickness of the aramid fiber honeycomb wave absorption plate (4) is 8.5mm or 4.0mm, the single-layer thickness of the two layers of alkali-free glass fiber epoxy prepreg cloth (5, 6) is 0.2mm, the thickness of a 120-mesh copper screen (7) is 0.2mm, and the single-layer thickness of the two layers of alkali-free glass fiber epoxy prepreg cloth (8, 9) is 0.2 mm;
the forming process of the stealth composite material is characterized by comprising the following steps of:
A. the composite material is formed by bonding two layers of alkali-free glass fiber epoxy prepreg cloth (2, 3), an aramid fiber honeycomb wave absorbing plate (4), two layers of alkali-free glass fiber epoxy prepreg cloth (5, 6), a 120-mesh copper screen (7) and two layers of alkali-free glass fiber epoxy prepreg cloth (8, 9) according to a certain sequence. Bonding under the vacuum pressure of-0.095 to-0.1 MPa, simultaneously heating to 80-90 ℃, and keeping the temperature and the pressure for 100-200 min;
B. cutting: cutting the molded stealth plate according to the required molding size requirement, and performing edge drawing treatment on the aramid fiber honeycomb wave absorption plate (4) corresponding to the outer profile of the cut stealth plate, wherein the edge drawing depth is 3-7 mm;
C. arranging glass steel column mounting holes at certain intervals, and bonding the glass steel columns in the glass steel column mounting holes in a sealing manner;
D. sealing the cut edge of the aramid fiber honeycomb wave absorbing plate (4);
E. attaching the sealed stealth plate and a device to be stealthed, and fixing the device by penetrating a bolt through a glass steel column;
F. and spraying the polyurea protective layer (1) on the outermost layer.
Further, in step C, D, the sealing-edge pug for sealing treatment includes: epoxy resin JL220A, 120-mesh glass beads and 400-mesh white carbon black are mixed into a mixed adhesive according to the weight part of 100: 15: 25; and then the mixed adhesive and an epoxy curing agent JL220B are mixed according to the weight ratio of 140: 25 to prepare the edge sealing mud.
Further, the bonding in the step A is carried out under the vacuum pressure of-0.095 to-0.1 MPa, the temperature is increased to 80-90 ℃, and the heat preservation and pressure maintaining time is 240 min.
Furthermore, the polyurea protective layer in the step F is made of a SPUA-M200 slow polyurea material which is a two-component aliphatic polyurea material, and the coating is composed of a component A and a component B. The material needs to be matched with D-31 primer for use so as to improve the adhesive force of the polyurea protective coating.
The invention has the beneficial effects that: the invention adopts the structural wave-absorbing material as the wave-absorbing layer and adopts a honeycomb sandwich structure, so that the wave-absorbing material has light weight, good mechanical property and good heat insulation performance. The alkali-free glass fiber epoxy prepreg cloth is used as a panel layer, can effectively protect a wave absorbing layer, reduces the influence of the external environment on the performance of the wave absorbing layer, has good wave permeability, avoids the influence of the outside on the wave absorbing performance of the wave absorbing layer, can also well match the electrical performance characteristics of the aramid fiber honeycomb wave absorbing plate, and further ensures the attenuation and absorption of the light stealth plate on incident electromagnetic waves. Wherein the 120-mesh copper screen is used as a reflecting layer, and after the wave absorbing layer is arranged, the electromagnetic waves penetrating through the wave absorbing layer can be reflected into the wave absorbing layer so as to be fully absorbed. A sealing method is adopted at the periphery of the stealth composite, so that the inner core material is effectively protected, the core material is prevented from being corroded by external environmental factors, the resin used for sealing is moderate in hardness, and the requirement for later-stage installation polishing processing can be met.
The wave absorbing layer has good wave absorbing performance as a structural function, and aramid fiber honeycomb wave absorbing plates with different thicknesses can be selected according to requirements to determine the final thickness. On the other hand, the wave-absorbing layer is covered by the glass fiber reinforced plastic skin, so that the wave-absorbing layer can resist the corrosion of the external environment, and has long service life and high reliability; and the installation is simple, convenient and quick in the installation process by adopting a bolt connection mode to install on the corresponding framework, and convenience is provided for subsequent repair and replacement.
In conclusion, the invention provides the preparation method of the stealth composite material, which has the advantages of good wave-absorbing function, long service life and high construction efficiency.
Drawings
Fig. 1 is a schematic structure of a stealth composite material.
In the figure: the composite material comprises a polyurea protective layer 1, an alkali-free glass fiber epoxy prepreg cloth 2, an alkali-free glass fiber epoxy prepreg cloth 3, an aramid fiber honeycomb wave absorbing plate 4, an alkali-free glass fiber epoxy prepreg cloth 5, an alkali-free glass fiber epoxy prepreg cloth 6, a 7120-mesh copper screen, an alkali-free glass fiber epoxy prepreg cloth 8, an alkali-free glass fiber epoxy prepreg cloth 9, a fixing device 10 and a connecting bolt 11.
Detailed Description
The following examples are intended to further illustrate the present disclosure, but not to limit the scope of the invention.
1) And blanking of raw materials: according to the design size requirement, cutting alkali-free glass fiber epoxy prepreg cloth (the single layer thickness is 0.2mm), an aramid fiber honeycomb wave absorbing plate (all edges and corners of a honeycomb core are polished to be smooth) and a copper screen;
2) and drying the aramid fiber honeycomb wave-absorbing plate: drying for 30 +/-5 min at 40-50 ℃ in a heating chamber, and removing water in the aramid fiber honeycomb wave-absorbing plate.
3) And forming and laying: laying 2 layers of alkali-free glass fiber epoxy prepreg cloth (the thickness of a single layer is 0.2mm) → vacuumizing (the vacuum pressure is controlled between-0.095 and-0.1 MP) for compacting (the compacting time is more than or equal to 15min and less than or equal to 45 min). → laying aramid fiber honeycomb wave absorbing plate with thickness of 4mm → repeating the above operations and vacuum compacting; → laying 2 layers of alkali-free glass fiber epoxy prepreg → laying 1 layer of 120-mesh copper screen → laying 2 layers of alkali-free glass fiber epoxy prepreg → repeating the above operations, vacuumizing and compacting; then, forming the mixture by vacuum pressure of-0.095 to-0.1 MPa, heating to 80-90 ℃ and keeping the temperature and pressure for 120 min;
4) and cutting: and cutting the formed stealth board according to the design size requirement. And the cut aramid fiber honeycomb wave absorbing plate in the outer contour of the stealth plate is subjected to edge cutting treatment, the depth is 5mm, and the aramid fiber honeycomb wave absorbing plate is about 3 honeycomb core grids. According to the design requirement, a phi 15 glass fiber reinforced plastic column hole (the inner hole is phi 9) is drilled;
5) and edge sealing and bonding the glass steel column: the cut stealth board is subjected to edge sealing treatment, and the edge of the stealth composite board is filled
Edge sealing glue is filled into the holes of the glass steel columns, the glass steel columns are placed in the holes, curing is carried out for 10-20 hours at normal temperature, then grinding is carried out by using about 200-mesh sand paper, and the edge sealing process is repeated until the edge sealing is tight;
6) connecting and fixing the hidden plate and the fixing device by using bolts M8 and 30;
7) and polyurea spraying: polishing the outermost surface of the stealth board, performing surface modification, adopting a polyurea protective coating made of an SPUA-M200 slow polyurea material and matched with a D-31 primer after the polyurea protective coating is qualified so as to improve the adhesive force of the polyurea protective coating, and spraying the polyurea coating with the thickness of (1.0 +/-0.1) mm;
the peel strength of the molding surface of the stealth material prepared by the embodiment is not less than 4N/cm, and the wave-absorbing performance is shown in the following table; serial number-anti-radar wave band-radar reflectivity of 1, S is less than or equal to-2 db; 2. C is less than or equal to-5 db; 3. X is less than or equal to-10 db; 4. Ku is less than or equal to-8 db; 5. Ka is less than or equal to-5 db.

Claims (5)

1. A stealth composite material is characterized by comprising the following components in sequence from outside to inside: the composite material is formed by bonding a polyurea protective layer (1), two layers of alkali-free glass fiber epoxy prepreg cloth (2, 3), an aramid fiber honeycomb wave absorbing plate (4), two layers of alkali-free glass fiber epoxy prepreg cloth (5, 6), a 120-mesh copper screen (7) and two layers of alkali-free glass fiber epoxy prepreg cloth (8, 9).
2. The stealth composite as defined in claim 1, wherein: the thickness of the polyurea protective layer (1) is 0.9-1.1 mm, the single-layer thickness of the two layers of alkali-free glass fiber epoxy prepreg cloth (2 and 3) is 0.2mm, the thickness of the aramid honeycomb wave absorbing plate (4) is 8.5mm or 4.0mm, the single-layer thickness of the two layers of alkali-free glass fiber epoxy prepreg cloth (5 and 6) is 0.2mm, the thickness of the 120-mesh copper screen (7) is 0.2mm, and the single-layer thickness of the two layers of alkali-free glass fiber epoxy prepreg cloth (8 and 9) is 0.2mm, and the polyurea protective layer is formed by bonding the layers.
3. The process for forming a stealth composite material as claimed in claim 2, comprising the steps of:
A. bonding two layers of alkali-free glass fiber epoxy prepreg cloth (2, 3), an aramid fiber honeycomb wave absorbing plate (4), two layers of alkali-free glass fiber epoxy prepreg cloth (5, 6), a 120-mesh copper screen (7) and two layers of alkali-free glass fiber epoxy prepreg cloth (8, 9) according to a certain sequence; bonding under the vacuum pressure of-0.095 to-0.1 MPa, simultaneously heating to 80-90 ℃, and keeping the temperature and the pressure for 100-200 min;
B. cutting: cutting the molded stealth plate according to the required molding size requirement, and performing edge drawing treatment on the aramid fiber honeycomb wave absorption plate (4) corresponding to the outer profile of the cut stealth plate, wherein the edge drawing depth is 3-7 mm;
C. arranging glass steel column mounting holes at certain intervals, and bonding the glass steel columns in the glass steel column mounting holes in a sealing manner;
D. sealing the cut edge of the aramid fiber honeycomb wave absorbing plate (4);
E. attaching the sealed stealth plate and a device to be stealthed, and fixing the device by penetrating a bolt through a glass steel column;
F. and spraying the polyurea protective layer (1) on the outermost layer.
4. A process for forming a stealth composite as claimed in claim 3, wherein: step C, D, the sealing edge mud for sealing treatment comprises: epoxy resin JL220A, 120-mesh glass beads and 400-mesh white carbon black are mixed into a mixed adhesive according to the weight part of 100: 15: 25; and then the mixed adhesive and an epoxy curing agent JL220B are mixed according to the weight ratio of 140: 25 to prepare the edge sealing mud.
5. A process for forming a stealth composite as claimed in claim 3, wherein: and B, bonding under the vacuum pressure of-0.095 to-0.1 MPa, heating to 80-90 ℃ and keeping the temperature and pressure for 240 min.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105783599A (en) * 2016-05-17 2016-07-20 长沙达菲新材料科技有限公司 Light stealth armor and preparation method thereof
CN107009710A (en) * 2017-04-06 2017-08-04 南京大学 A kind of lightweight broad-band structure inhales ripple plate and preparation method thereof
CN206807977U (en) * 2017-06-26 2017-12-26 宜昌华邦石墨有限公司 A kind of electromagnetic armouring structure prepared using graphite paper

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0811130A (en) * 1994-06-28 1996-01-16 Hitachi Chem Co Ltd Prepreg and manufacture of copper plated laminated sheet for which that prepreg is used

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105783599A (en) * 2016-05-17 2016-07-20 长沙达菲新材料科技有限公司 Light stealth armor and preparation method thereof
CN107009710A (en) * 2017-04-06 2017-08-04 南京大学 A kind of lightweight broad-band structure inhales ripple plate and preparation method thereof
CN206807977U (en) * 2017-06-26 2017-12-26 宜昌华邦石墨有限公司 A kind of electromagnetic armouring structure prepared using graphite paper

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
方舱用蜂窝吸波材料的吸波性能研究;刘文言等;《安全与电磁兼容》;20161231(第06期);51-53 *

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Inventor after: Song Qingxiang

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