CS196457B1 - Method for metal plating polymers especially textile materials - Google Patents

Abstract

Strongly adhering metal coatings resistant to wear are produced on inorganic or organic polymers, esp. fibres, by forming a conductive surface film, pref. by graft polymn. of unsatd. cpds. contg. metal ions or H atoms replaceable by metals (e.g. Na or Ag acrylates), followed by galvanic coatng with a metal(s), e.g. Cu followed by Cr.

Description

(54) Metallization process for polymers, especially textile materials

The invention is a method of metallizing the surface of polymers, particularly textile materials.

It is known that surfaces of organic and inorganic materials can be modified by metal vapor deposition under vacuum. The disadvantage of this method is that the vaporized metal layer has low resistance to mechanical stress, particularly to abrasion and sharp bending stress.

Further, there are known methods for metallization of copolymers consisting of at least two phases, one of which has a tuft structure Still in colloidal dimensions. This phase must dissolve more rapidly in the aggressive agent (mordant) than the other phase or the other phases. This creates an adhesive surface. Simultaneously with or after pickling, embryos of noble metals are introduced into the plastic surface by means of which a chemical precipitation of a metal such as copper or nickel can take place, thereby rendering the plastic surface conductive. Any disadvantage of the method is that the plastic must consist of at least two phases.

In another method, a conductive lacquer layer is applied to the plastic surface on which metals can then be electroplated. The disadvantage of this method is that the coatings thus obtained are poorly resistant to abrasion and are therefore hardly used.

The purpose of the invention is to propose a method for metallizing organic and inorganic polymers,

196 457

186 457 especially organic and inorganic textile materials »which eliminates the disadvantages of the prior art processes and expands the range of metallizable organic and inorganic polymers * The object of the invention is to apply metal coatings to the treated surface of organic and inorganic polymers» adhesive ·

The object of the present invention is essentially accomplished by the fact that a polymer-bonded surface film adhering to the polymer is applied to the polymer by means of a graft polymerization, it is made conductive and a metal coating is applied.

Salts of unsaturated acids »for example sodium acrylate» are grafted onto the polymer »preferably under radiation chemical initiation» and conductive electrolytes are added »for example during the grafting process ·

Mechanically adhesive metal coating can be achieved by grafting the salt of noble metals of unsaturated acids »preferably silver acrylate, with radiation chemical initiation ·

Furthermore, a mechanically tightly adhering film can be produced according to the invention in that an unsaturated compound is grafted onto the polymer »preferably acrylic acid» on the polymer is prepared by exchanging acid hydrogen with a noble metal ole »particularly silver salt» and irradiated .

Precious metal nucleation »especially silver nucleation» serves as a nucleation for chemical deposition of metals »for example copper or nickel · The film thus formed is galvanically thickened ·

The surface formations coated by the method according to the invention have a very decorative appearance. They are highly resistant to abrasion and mechanical stress. Plating prevents the formation of electrostatic charges »otherwise occurring on untreated sheets. Further, the surface formations provided in the manner proposed are light-colored and resist aggressive environments compared to materials treated in known methods.

DETAILED DESCRIPTION OF THE INVENTION The method of the invention is illustrated in greater detail by the following examples and the accompanying drawings, in which FIG. 1 shows schematically a method of metallizing a knitted fabric of polyamide silk and FIG.

Wale knitted fabric 2 ^{made of} polyamide silk under a scanning device 2 is irradiated with an electron accelerator J £ electron beam to a dose of 10.3 Gy ^ and then grafted into the graft vessel 20% sodium acrylate solution 6 to a weight gain of 20%. In the washing machine X, unrelated monomers of the sodium acrylate solution 6 are washed from polyamide silk in the washing medium 8 of knitted fabric 1. After washing, the polyamide silk chain knit 1 is passed through the roller 10. serving as the cathode of the galvanizing bath 6 into a bath in which the polyamide silk chain knit is deposited on the chain knit 1. The precipitated copper is replenished as usual into the electroplating bath 6 by a copper anode 11. The copper deposited on the polyamide silk chain knitting 1 serves as a base for the subsequent elimination of chromium from the second solution 10 in the second plating bath 12. The second anode 14 is made of lead. Polyamide silk chain knit 1 ee is finally washed in washing machine X, dried in dryer

19В 457 and reel. (Fig. 1).

Example 2

A polyester fiber web 16 with a decomposition device 2. the electron accelerators J irradiate the electron beams 4 to a dose of 10 ' The grafting vessel was grafted with a 20% acrylic acid solution 17 up to a weight gain of 10%. In the reaction vessel 18, with a silver nitrate solution 19, a silver salt of acrylic acid grafted onto the fabric 16 is produced from polyester yarn. The polyester yarn fabric 16 thus treated is then exposed to light radiation 20, thereby not producing silver embryos on the fabric 16. In the reaction vessel 18, the embryos 8 are silver. located on the fabric 16 eliminated · ^E m · ^d of a solution of 21 ^lšíh mesna with ^L! formaWehydu, ^PRICE EMZ MES formed on zárodcíc ^H st ^{of manufacture} bra conductive ^p o ^l and ^k. The ^ achieving ^and water ^ ost allows amp ^clay ene ^and the layer ^{Y of} copper in the electroplating bath. · In the second electroplating bath 12 forms · layer basis for the subsequent elimination of chromium from the second solution 13 · Even here the second anode 14 of lead . The polyester yarn fabric 16 is finally washed in the washer 2 dried in a dryer 15 and then wound up. (Fig. 2).

Example 3 ^p o ^ly e ^Tyle new ^{and Fol} IE ^p o ^d maiden ^kl and ^d ew device determines ^y c ^hl ovaěe irradiated by electron beam to a dose of 2.10 'Gy, and then the graft vessel is grafted with 20% sodium acrylate solution to a weight gain 28%. · In the washing machine in the scrubbing medium being washed out from ^poly e ^{Tyle newly films and} IE unreacted ^g crosslinked with ^s monomer ^{solution resulted} and ^{the r-yl} anus sodium ^eh o. The films are then ^p řevede to electrophoretic bath containing · lacquer for electrophoretic deposition . Between the cylinder and the tank ^{runs PR! L} marry ^{five. p} o ^ly et ^YLE new ^{and foil} eo ^p en and ^{Tr and} Ta ^for this paint layer is ^{of p} and dried in the dryer and the reel.

EXAMPLE 4 ^p o ^ly et ^YLE new ^{films and} the IE Uouš ^ e ¹ 5 m behind. ^Prior em e ^{l y} production conductive plate oz ^{y Ar} I ^p from a scanning electron beam accelerator device with the deployment of a suitable metal template to dose 2.10 'Gy and AE graft vessel is grafted with 20% acrylic acid solution to a weight gain of 32%.

· In a reaction vessel using a third silver nitrate solution prepared by ^the silver salt and ^the yseHny ^yl R b ^s r ° ^s u ^b ovan on ^poly e * t f ^ol new ^YLE ii ,. ^T galacto u ^{p Raven p} ol ^y et ^y l ^s NOCs ^and f ^o lie with ^p and ^{k y} s ^t AVI svHetaánu ^{radiation, No.} IMZ on ^poly et ^{YLE newly films and! I} vznitaou of ^plated rodk ^y silver . ^The rea ^to protrude n ^A to ^BE to ^{z, and} Ro ^{thanks to the T-íbrα,} nacMzejí ^ to ^p o ^ly et ^{YLE newly} f ^ol II, ^wherein Lou ^No and Me ^and that on Thursdays solution ^f orma ^ld ehy ^d ua sfranu m ^ to ^ he ^{par en} ICEM ^from m to embryos silver forms ^a pre ^{characterized} in Ivy ^{d p} o ^l and ^{k. T kt Z} axis by ^d as ^d Measured emissivities. ^allows zesíMt in g ^{l i la} vanizačn ^brand! copper layer. The metal layer is created only in places that have been exposed to electron radiation under the metal template.

Claims (4)

SUBJECT OF THE INVENTION Method for metallizing polymers, in particular textile materials, characterized in that a polymer-bonded surface film adhering to the polymer is applied to the polymer by means of grafting polymerization. 196 457 with conductive and metal coating applied · Process according to claim 1, characterized in that salts of unsaturated acids, for example sodium acrylate, are grafted onto the polymer, preferably under radiation-chemical initiation, and they add conductive electrolytes, for example during the grafting process. Method according to claim 1, characterized in that the polymer is grafted to the polymer with noble metal salts of unsaturated acid, preferably silver acrylic, with radiation chemical initiation. Process according to claim 1, characterized in that unsaturated compounds, preferably acrylic acid, are grafted onto the polymer, the noble metal salts, in particular silver salts, are prepared on the polymer by acidic hydrogen exchange, and the polymer thus treated is irradiated, preferably by light radiation.