Polyethylene reinforced radar cowl of ultra-high molecular weight, preparation and application thereof

An ultra-high molecular weight, radome technology, applied in the field of radome, can solve the problems of reducing the dielectric properties of radome and affecting the wave permeability, etc., and achieve the effects of good weather resistance, low manufacturing cost and easy implementation

Inactive Publication Date: 2009-02-11
DONGHUA UNIV +1
View PDF0 Cites 39 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its high water absorption (at 22°C and 65% relative humidity, the water absorption rate reaches 3.7%) will greatly reduce the dielectric properties of the radome, thereby affecting its wave permeability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Prepare the resin glue according to the following formula:

[0063] Bisphenol F type epoxy resin (epoxy value 0.512) 100 parts (wt%)

[0064] Curing agent: 5 parts (wt%) of diethylaminopropylamine (DEPA)

[0065] The 10-layer three-dimensional UHMWPE square cloth prefabricated part with a volume content of 55% and the resin glue are cured at 65°C for 4 hours to form a wave-transparent composite material, and then assembled into a 12mm thick single-layer structure radome by splicing bolts .

[0066] The mechanical properties and dielectric properties of the prepared samples were analyzed and tested, and the technical indicators are shown in Table 2.

[0067] Table 2 Technical indicators of detection

[0068] Dielectric constant ε Dielectric loss tanδ Bending strength at room temperature σ Wave transmittance% 3.18 0.018 184 85

Embodiment 2

[0070] Prepare the resin glue according to the following formula:

[0071] Epoxy resin: Epoxy618 100 parts (wt%)

[0072] Curing agent: Iminazole5510 10 parts (wt%)

[0073] The twill UHMWPE woven fabric preform with a volume content of 55% and the resin glue were cured at 80° C. for 2 hours to form a surface layer material.

[0074] The 2mm-thick surface material and the 8mm-thick PVC foam are glued together with the epoxy adhesive Araldite, cured at 120°C for 3 hours to form a wave-transparent composite material, and then assembled into a 12mm-thick sandwich structure by bolt splicing and bonding radar cover.

[0075] The mechanical properties and dielectric properties of the prepared samples were analyzed and tested, and the technical indicators are shown in Table 3.

[0076] Table 3 Technical indicators of detection

[0077] Dielectric constant ε Dielectric loss tanδ Bending strength at room temperature σ Transmittance 2.90 0.010 208 89

Embodiment 3

[0079] Prepare the resin glue according to the following formula:

[0080] Jinling DSM 1777-G-4 unsaturated polyester resin 100 parts (wt%)

[0081] Curing agent: 2 parts of methyl ethyl ketone peroxide (wt%)

[0082] Accelerator: 1-4 parts of 6% cobalt naphthenate solution (wt%)

[0083] The UHMWPE plain weave fabric preform with a volume content of 55% and the resin glue were cured at 40° C. for 1.5 hours to form a surface layer material.

[0084] The 2mm-thick surface material and 8mm-thick polyurethane foam are glued together with epoxy adhesive Araldite, cured at 120°C for 3 hours to form a wave-transparent composite material, and then assembled by bolts to form a 12mm-thick sandwich structure radar cover.

[0085] The mechanical properties and dielectric properties of the prepared samples were analyzed and tested, and the technical indicators are shown in Table 4.

[0086] Table 4 Technical indicators of detection

[0087] Dielectric constant ε Dielectri...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to a radome with the enhanced ultra-high molecular weight polyethylene (UHMWPE), the preparation method and the application thereof. The radome can be made of a composite material with the enhanced UHMWPE fabric and also be made of the glued joint of a surface material and a sandwich material through a cementing compound with the solidification temperature being below 130 DEG C, wherein the surface material is the composite material with the enhanced UHMWPE, and the sandwich material is the material with low density and low dielectric property. The radome not only good has mechanical property and high wave transmissivity, but also is weather resist, therefore, the radome can provide protection for a radar antenna in terrible conditions and prolong the service life thereof.

Description

technical field [0001] The invention belongs to the field of radome, in particular to a radome reinforced by ultra-high molecular weight polyethylene (UHMWPE), its preparation method and application. Background technique [0002] Radar radome is referred to as radome or radome for short. Its main function is to prevent the impact and damage of harsh environments such as strong winds, rainstorms, hail, and heavy snow on radar antennas without affecting the emission and reception of electromagnetic waves, so as to prolong the service life and improve The reliability of the system ensures that the radar antenna works around the clock. [0003] The wave-transparent composite material is the basis for the preparation of the radome. It is a typical multifunctional material. The specific requirements for its performance are as follows: [0004] (1) Excellent dielectric properties: small dielectric constant ε, small loss tangent. In general, in the frequency range of 0.3-300GHz, t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/42B32B27/00
Inventor 王依民王佳许庆福刘术佳
Owner DONGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap