EP0053748B1 - Réflexion de micro-ondes d'articles textiles métallisés - Google Patents

Réflexion de micro-ondes d'articles textiles métallisés Download PDF

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Publication number
EP0053748B1
EP0053748B1 EP81109830A EP81109830A EP0053748B1 EP 0053748 B1 EP0053748 B1 EP 0053748B1 EP 81109830 A EP81109830 A EP 81109830A EP 81109830 A EP81109830 A EP 81109830A EP 0053748 B1 EP0053748 B1 EP 0053748B1
Authority
EP
European Patent Office
Prior art keywords
metallized
impregnation
polymer
reflexion
micro
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81109830A
Other languages
German (de)
English (en)
Other versions
EP0053748A2 (fr
EP0053748A3 (en
Inventor
Hans Georg Dr. Fitzky
Harold Dr. Ebneth
Wolfgang Dr. Oberkirch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of EP0053748A2 publication Critical patent/EP0053748A2/fr
Publication of EP0053748A3 publication Critical patent/EP0053748A3/de
Application granted granted Critical
Publication of EP0053748B1 publication Critical patent/EP0053748B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06Q—DECORATING TEXTILES
    • D06Q1/00—Decorating textiles
    • D06Q1/04—Decorating textiles by metallising
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/244—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons
    • D06M15/256—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons containing fluorine
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain

Definitions

  • Textile fabrics which have been electrolessly wet-chemically metallized according to DE-B-2 743 768 have, according to DE-A-2 847 485, good reflection properties for microwaves even with a low thickness of the metal layer.
  • the textile properties that have been preserved regardless of the metallization, in particular the low weight and the high textile elastic flexibility enable special applications in radar technology, for example in the manufacture of foldable reflectors for active and passive emitters, as well as radar reflecting material in the area of sea rescue, especially for reflectors, life jackets, roofs of lifeboat islands, oil tools etc. or to support radar detection in cases of object and person localization, e.g. tents, parachutes, backpacks, anoraks etc.
  • the invention therefore relates to a method for treating metallized textile fabrics to increase the microwave reflection in the frequency range from 1 to 1000 GHz, which is characterized in that the metallized textile fabric is space-filling with a polymer whose dielectric loss factor tg O'in the microwave range below 0.01 lies, impregnated.
  • space-filling impregnation means that the space between the warp and weft threads of the metallized fabric is filled as completely as possible by the polymer applied by the impregnation and, in addition, the metallized warp and weft threads are provided with a polymer layer, specifically so that one microscopic image with a magnification factor of 10 4 in the composite metallized fiber-polymer no voids are found that make up more than 10%, preferably more than 5%, of the cross-sectional area.
  • the layer thickness of the polymer applied to the metallized fibers is preferably at most 10% of the wavelength, in particular at most 1 to 3% of the wavelength.
  • the polymer to be applied by impregnation is selected so that it imparts water-repellent properties to the metallized fibers. This can contribute to a further reduction in reflection losses, for example when used in the context of sea rescue, where the highest possible contrast to the relatively well reflecting surface of the lake is desired, especially in waves.
  • the impregnation with the polymer is preferably carried out by treatment with a polymer solution, with a polymer dispersion or with a polymer melt, the treatment method depending on the nature of the polymers in individual cases.
  • the effect of reducing the reflection losses as a result of the impregnation is particularly pronounced for high frequencies (small wavelengths).
  • the reflection losses increase with falling wavelength due to the finite mesh size of the woven, knitted or non-woven fabrics used.
  • filament yarn fabrics with a very small mesh size are required.
  • the impregnation of the metallized textile fiber materials according to the invention enables a further improvement and the expansion of the field of application of metallized textile reflection materials to frequencies above 100 GHz, or the use of coarser-meshed and cheaper fabrics at frequencies in the range from approximately 10 to 100 GHz.
  • the impregnation material may optionally contain additional fillers, for example visible colorations with signal and warning colors, preferably those with low dielectric losses, e.g. B. alumina or titanium dioxide.
  • the textile metallized fabric is preferably metallized with nickel, but copper and gold are also suitable as metals to be applied.
  • the textile fabric is preferably a woven fabric, knitted fabric, knitted fabric, needle felt or fleece or is paper.
  • the metal coating preferably has a layer thickness of at least 0.05 ⁇ m. In general, metal layer thicknesses of 0.1 to 0.8 ⁇ m are sufficient to achieve good reflection values in the range from 0.01 to over 100 GHz. The metal layer is better protected against mechanical or chemical damage by the impregnation according to the invention compared to non-coated materials.
  • Suitable fiber materials are native fibers such as cotton, fibers made from organic polymers such as polyamide, polyester and polyacrylonitrile fibers, and glass fibers and carbon fibers, the textile fabrics made from these fibers preferably be made from appropriate filament yarns. Filament yarn fabrics made from the materials mentioned are preferably used.
  • tg d The so-called loss factor is understood as tg d. It is: ie tg ⁇ is the quotient of the imaginary part and the real part of the dielectric constant (Handbook for high-frequency and electrical engineers, C. Rint, ed., Wegig and Pflaum-Verlag Kunststoff-Heidelberg 1978, Vol. 2, p. 425 ff).
  • Nickel-plated polyester-cotton fabric 65/35 basis weight 152 g / m 2 , nickel content 23 g Ni / m 2 , impregnated on both sides with a 30% solution of a commercially available polyester polyurethane in ethyl acetate and dried.
  • Basis weight of the coated fabric 185 g / m 2 .
  • Nickel-plated polyester-cotton fabric from example 1 without impregnation.
  • Nickel-plated polyester-cotton fabric from example 2 without impregnation.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Claims (2)

1. Procédé pour traiter des articles planiformes textiles métallisés par des polymères en vue d'accroître la réflexion des micro-ondes dans l'intervalle de fréquence de 1 à 1.000 GHz, caractérisé en ce que l'on imprègne l'article planiforme textile métallisé, en remplissant tous les espaces vides, par un polymère dont le facteur de perte diélectrique tg δ dans le domaine des micro-ondes est inférieur à 0,01.
2. Procédé selon la revendication 1, caractérisé en ce que l'on utilise, pour l'imprégnation remplis- santtous les espaces creux, une solution, contenant du noir de carbone, d'un polyester-polyuréthanne.
EP81109830A 1980-12-04 1981-11-23 Réflexion de micro-ondes d'articles textiles métallisés Expired EP0053748B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803045790 DE3045790A1 (de) 1980-12-04 1980-12-04 Verbesserung der mikrowellenreflektion metallisierter textiler flaechengebilde
DE3045790 1980-12-04

Publications (3)

Publication Number Publication Date
EP0053748A2 EP0053748A2 (fr) 1982-06-16
EP0053748A3 EP0053748A3 (en) 1982-09-01
EP0053748B1 true EP0053748B1 (fr) 1984-07-18

Family

ID=6118326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109830A Expired EP0053748B1 (fr) 1980-12-04 1981-11-23 Réflexion de micro-ondes d'articles textiles métallisés

Country Status (2)

Country Link
EP (1) EP0053748B1 (fr)
DE (2) DE3045790A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3712192A1 (de) * 1987-04-10 1988-10-27 Alban Puetz Metallisierte textilbahn und verfahren zu deren herstellung
CN1099444C (zh) * 1998-09-01 2003-01-22 中国科学院物理研究所 一种微波介质材料及其制备方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB639740A (en) * 1947-10-21 1950-07-05 Suchy Holdings Ltd Improvements in and relating to radar reflection surfaces
GB810814A (en) * 1956-05-24 1959-03-25 Raymond De Icer And Engineerin Antennas and material for the manufacture thereof
ZA751636B (en) * 1975-03-17 1976-04-28 Oth Beier & Co Ltd Improvements in the coating of open mesh material
DE2847486A1 (de) * 1978-11-02 1980-05-14 Bayer Ag Verwendung von metallisierten textilen flaechengebilden als strahlenschutz gegen mikrowellen
DE3017204A1 (de) * 1980-05-06 1981-11-12 Bayer Ag, 5090 Leverkusen Verfahren zum beschichten von flaechengebilden aus metallisierten textilfasern und deren verwendung fuer die herstellung von mikrowellen reflektierenden gegenstaenden

Also Published As

Publication number Publication date
DE3162699D1 (en) 1984-04-19
EP0053748A2 (fr) 1982-06-16
EP0053748A3 (en) 1982-09-01
DE3045790A1 (de) 1982-07-08

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