DE1669586C - Process for the pretreatment of size-coated glass fibers for metallization - Google Patents

Description

I 669 586

The present invention relates to a Process / in pretreatment w> u with finishing coated glass fibers for metallization.

It is well known to carry out a special cleaning process prior to the metallization of the glass fibers. With sizing, all cilas fibers also have the disadvantage that in many lulls aiii (iriiiul the aggregation and consistency of the sizing substances a metallization on the sizing substance is based significantly impaired / .. It if it is applied by decomposing Melallcarhonyl Mau came the sizing "located on the Glusfaser lurch application correspondingly high temperatures evaporate however, the heating of a glass fiber strand • is due to the thermal conductivity ^{sc'ilechtcn:...} not just In addition, the evaporation of the size requires the supply of a relatively considerable amount of thermal energy, which is only used to a small extent.

It is already known to fabricate glass fiber fabrics by using radiant heaters or hot gas streams to heat so far that the volatile sizing constituents are removed. Fs is still known to use radiant heating and a hot gas stream when heating the glass fiber fabric combine to damage the fabric duicli burning the volatile sizing components near the tissue to learn earlier. All of these known methods have the disadvantage that only a small part of the generated heat is absorbed by the glass fiber because, on the one hand, the Glass fiber shows only a low level of radiation absorption and, on the other hand, the use of heating gases even when the glass fiber fabric flows past me a relatively low uptake of Tub liiliil. Due to the low thermal conductivity d -.- r I aser and the sizing must also the Gaie and also the radiation source)! at relative high I empathize to work in a mcßlmen / hurry a successful amount of heat to the glass fiber fabric aiil / uliringeii. These high temperatures liihien, ilier, in turn, are conducive to damage certain parts which are most exposed to the action of the radiation source or the hot gases, whose Kiiipeialur often for the glass fiber / u high is. The lely low thermal conductivity and low stability of the cilas fibers leads iiul'u rd / ni da / u, daf> the removal of the size is a relatively long process, what L-iii'iseit ·. the Ailu'itslempo limited and on the other hand ι inr / η laiiüc duration of action of high Teuipcratiuui on the fiber.

It is widely known to use fiber optics treat the sizing with an open goal line aiii (Ir Olicillüchc ties fabric burned off wild I. never solid treatment is in the cone for die Eifeii, ι hallen dci (ilasfiberu undesirable, quite apart from that, dull the iciz energy in this case too mn is used incompletely and a relatively long Πι h.iuilluugsdaiier is required which leads to an impairment of the glass fiber cushions can lead.

The present invention has the task posed, eliminating the sizing on the fiberglass to be carried out particularly quickly and effectively. Another task of the hurry is to help the Carry out pretreatment of the glass fiber so that the surface of the glass laser is particularly good Provides adhesion for the metal layer to be applied.

ίο The invention solves this problem in that First replace a relatively thin layer with / from Melalicarhoml on the Gherllächc der GlasfasL. · Is applied and that afterwards such a strong glass frcqucn / .fcld is created along the thread is that see along the thread forms a gas discharge.

It has been shown that a sufficiently strong high-frequency field causes a gas discharge in every case can be achieved, which leads to such a rapid heating of the Schliclueüberzuges takes place that this softens and is then thrown off explosively. By the High-frequency field results in a concentration of the gas discharge on the surface of the thread.

After parts of the metal layer have been scraped off, the gas discharge preferably runs between the adjacent metallic islands, which are then also thrown off in the course of the process. It has been shown that the spattering on the surface of the glass fiber causes irregularities result, which cause a particularly good adhesion of a subsequently applied metal layer.

The method according to the invention can be carried out with commercially available high-frequency oscillators.

The invention is illustrated by way of example with the aid of the figure.

In the figure, the glass fiber strand is denoted by 1, while the metal layer that forms the fiber and does not need to be in the Hezug / ilfer 2 is indicated. The in itself thin metal layer is shown relatively thick only for the sake of simplicity of illustration. The Ilochfrequen / gcneiatiir is about the two tubular electrodes 3 and 4 surrounding the thread. through which the thread is contactless can be felt through ki'.nn. / between electrodes 3 and 4, a thread is created bundled Hochfieqiicn / fcld. which leads to a gas discharge leads longitudinally between the electrodes

r »read the thread runs.

Claims (1)

Claim Process for the pretreatment of size-coated glass fibers for metallization, the size being removed prior to your application of the final metallic top / iigi-s becomes, d a d ti r c h gc k c η η / e i c h η e l. that to next a relatively thin layer of metal by replacing metal carbonyl on the surface the glass fiber is applied and that afterwards such a strong high tension along the thread is generated because a gas discharge is formed along the thread.