JPS63165581A - Production of metal coated fiber - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method for producing monometallic fibers.

(Prior art) Conventionally, as a method of imparting conductivity to fibers, silver powder 1
There are methods of kneading carbon black etc. into fibers and plating methods.1 Many proposals have been made so far.

In the plating method, for example, the invention described in JP-A-60-99071 No. 1 is used for polyester lv fiber, which is a hydrophobic fiber, and the invention described in JP-A-61-65780 is used for water-absorbent fiber. Can be mentioned.

(Problems to be Solved by the Invention) Among the above conventional methods, the biggest problem with the kneading method is that it is difficult to uniformly disperse silver powder, car pump hooks, etc. into the fiber-forming polymer. 1. Therefore, if the nozzle is clogged, it may cause operational problems such as thread breakage.

In addition, hydrophobic fibers such as polyester cannot be plated (because they cannot be plated), so techniques such as forming micropores on the fiber surface or introducing specific functional groups, as described in JP-A-60-99071, can be used. On the other hand, water-absorbing fibers swell during the plating process and shrink after drying, which reduces the adhesion between the fibers and the metal, and also causes the pretreatment solution to be carried into the plating solution, causing a reaction. There are problems such as adverse effects.

Therefore, an object of the present invention is to provide a means for producing uniform metal-coated fibers with excellent adhesion without the above-mentioned problems.

(Means for Solving the Problems) The object of the present invention is achieved by activating acrylic fibers, applying chemical plating, and then electroplating.

Here, the acrylic/l/fiber consists of an AM polymer containing 40!1ffi% or more of 1acrylic pnitrile (hereinafter referred to as AN)! 4! It is a general term for i and iI, and its forms include paper sheets with one short fiber and one long fiber, nonwoven fabric, and woven fabric. Note that other fibers such as polyamide-based, polyester-based, regenerated cellulose, alcohol-based cotton, etc. may be mixed in an amount of 90% by weight or less, preferably 8096% or less.

The activation treatment method is to sensitize with a mixed solution of tin chloride (1) and hydrochloric acid, and then activate with a mixed solution of palladium chloride (1) and hydrochloric acid. Method for attaching acidic palladium colloid containing 8
Examples of methods include a method of depositing Padilla colloid obtained by reducing an aqueous solution of palladium (1) chloride with tetrium borohydride or the like in the presence of a surfactant.

For chemical plating, 1m of the target metal such as nickel, 1Ms cobalt, 1Ms tin, etc.
It may be immersed in a chemical solution containing ff1 or two or more types of ions and a reducing agent, but plating with nickel, copper, or copper is preferable from the viewpoint of the plating speed and the performance of the plated fibers.

In addition, there are no restrictions on the electroplating method, and known plating solutions such as copper, nickel, 1 pm, tin, zinc, silver, 1 platinum, 1 gold, 12 dium, 1 palladium, etc. can be used, and multilayer plating or composite plating can be used. Gold plating is also possible. For industrial electroplating, nickel μ and copper plating are preferred.

(Effects of the Invention) As described above, by the method of the present invention, it is possible to quickly and uniformly produce fibers coated with gold without requiring any special steps or complicated operations. The fibers obtained can be used alone or mixed with other fibers to make fibers for clothing with excellent conductivity or controllability, or they can be used for electromagnetic V by dispersing them in a matrix of paper, resin, metal, etc. -Widely used for molded conductive materials, electrode plates for alkaline batteries, acoustic diaphragms, etc.

(Example) Examples are shown below to facilitate understanding of the present invention.

5! Example 1 After washing an acrylic fiber woven fabric (fabric weight: 100 g/j12) with boiling water to remove oil, 1 g of palladium chloride was added.
A paddillam hydrosol prepared with chloride II and hydrochloric acid II was soaked and activated with 10% sulfuric acid.

This sample was copper plated in the electroless M plating bath described below.

CuSO4H5H2015g / J 1!1DTA 45 #HC30
(3696 liquid) 581L47 gp H
(Adjust with M & O)i) 12.52.2'
-Bipyridine 10η/jPICG $10
00 5001 Next, the above sample was electroplated for 10 minutes using a sulfamine bath as follows.

Plating bath composition: Full nickel 7-amic acid 30. α・g/
1g NiCl+/I' 5
0 #boric acid
30 l Pitrenu S (manufactured by Nihon Kagaku Sangyo Co., Ltd.)
2rnl/1li 4.0 writing level 55℃
wtm density 5 A
/dm" When the surface electrical resistance of the obtained plated sample was measured, it was α5 A/cyx2, indicating good tetraelectricity.

Also, 'f!' at the frequency of 500 MH2 for this sample! L
Field shielding property is 70 (L B1 magnetic field shielding property is 50
dB, indicating good electromagnetic shielding properties.

Claims (1)

[Claims] 1. A method for producing metal-coated fibers, which comprises activating acrylic fibers, applying chemical plating, and then electroplating.