JPH07194414A - Resin working method of metal coated surface zipper - Google Patents

Abstract

PURPOSE:To prevent the dislodgment of metal and to improve the electrical conductivity by forming a metallic film by an electroless plating method on the hook surface and loop surface of a surface zipper made from polyester or polyamide fibers and spraying a prescribed weight % of an urethane resin thereto. CONSTITUTION:The synthetic resin surface zipper having the loops consisting of multifilaments and hooks of monofilaments is refined and degreased. Microruggedness is generated by a caustic alkali soln. and the surfaces are roughened by treating for 60 minutes in a sodium hydroxide soln. kept at 80 to 90 deg.C at the time of the polyester fibers. The surface of a polyamide fiber is ruggedly formed in an aqueous solution of formic acid at 55 to 60 deg.C for 60 minutes. Next, the zipper is immersed into a soln. mixture composed of palladium and silver chloride to form the metallic plating film of copper, nickel, etc., with the palladium deposited in the roughened parts as nuclei. Only the loop surface and hook surface are then sprayed with the urethane resin at 0.02 to 0.5wt.% of the weight of the surface zipper. As a result, the dislodgment of the metal is prevented and the electrical conductivity is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin processing method for a metal-coated planar fastener, further comprising a non-conductive synthetic fiber as a material, and a metal film peeling of a conductive planar fastener having a metal film formed by electroless plating. It relates to a resin processing method for prevention.

[0002]

2. Description of the Related Art Recent advances in semiconductor integration technology and the reduction in size and weight of electronic devices incorporating integrated circuits are remarkable. One element that has made it possible to reduce size and weight is:
There is plasticization for the housing of electronic devices. Since the plastic used for the housing is non-conductive, electromagnetic waves pass through the housing and are radiated, and there is a risk that it may enter other electronic devices in the vicinity and cause malfunction.

As one measure, in order to prevent the electromagnetic waves emitted from the device from leaking to the outside, plating is applied to the housing, metal foil is attached, and metal powder is kneaded into the plastic to mold the housing to improve conductivity. Measures are taken such as giving the electronic equipment, or storing the electronic equipment in a wire mesh or a shield cage made of a metal plate, or installing the equipment in an electromagnetic shield room so that an operator can work in the same room. It is desirable that the opening / closing part of the electromagnetic wave shield room or the shield cage, the window curtain, or the like can be easily removed, and a surface fastener or the like is suitable for that purpose.

However, since an ordinary sheet fastener is made of synthetic fiber, it cannot be used as an electromagnetic wave shield material which is an electrically poor conductor and which requires electrical conductivity. Since conductivity is a necessary condition for use as an electromagnetic wave shielding material, use of metal fasteners or use of synthetic fiber fasteners after metal plating is being studied.

For example, Japanese Patent Publication No. 53-33886,
Japanese Patent Publication No. 56-32921 discloses a fastener made of metal fiber. Or, Japanese Patent Publication No. 54-215
No. 52, Japanese Patent Application Laid-Open No. 2-174297, or Japanese Patent Application Laid-Open No. 2-185204 discloses contents of performing metal plating on a synthetic fiber or natural fiber planar fastener by an electroless method.

[0006]

The metal fiber fasteners described above have the drawbacks of lacking in flexibility and weight, and in addition, the hook surface and the loop surface are deformed by a large number of times of attachment and detachment, resulting in weak adhesion. . Furthermore, JP-A-2-174297
The publication discloses a method of producing a conductive slide fastener by applying electroless copper plating or nickel plating to a fastener tape made of synthetic fiber or natural fiber, and then implanting a metal element (tooth). There is.

According to this method, a fastener tape is plated to give conductivity, and a metal element is planted in a portion to which a strong external force is applied. The fastener tape is used by cutting its length freely. There is a drawback that cannot be done.
Furthermore, a method is described in which a polyester tape is etched with caustic soda and then metal-plated by electroless plating. However, a fastener such as a fastener having good adhesiveness that can withstand a portion to which an external force is applied cannot be produced. .

Further, in JP-A-2-185204, a fine particle silica gel is mixed in advance with a polyester resin for fiber spinning, and a filament is spun, and then a fastener is manufactured. Then 95% with 4 wt% caustic soda solution
A method is disclosed in which alkali treatment is performed at 0 ° C. to dissolve and remove silica gel to form irregularities on the surface, and then a metal film is formed on the surface by electroless plating. The above method involves mixing fine particle silica gel with polyester as a raw material in advance and spinning out filaments, and there is a problem that a special sheet fastener must be prepared. In addition, there is a drawback that it is expensive in terms of cost because it is specially manufactured.

[0009]

The present invention has been completed as a result of intensive studies based on the above-mentioned current situation. That is, the present invention is a planar fastener made of a polyester fiber or a polyamide fiber as a material, and a urethane resin is used as a planar fastener by a spraying method on a hook surface and a loop surface on which a metal film is formed by an electroless plating method. For 0.02
The present invention relates to a resin processing method for a metal-coated planar fastener, which is characterized by applying 0.5 to 0.5% by weight. First, in the present invention, a commercially available synthetic fiber sheet fastener is used. In many cases, the loop is made of multifilament and the hook is made of monofilament. After the surface fastener is scoured and degreased, in the case of polyester fiber, the surface is hydrolyzed with a caustic alkali solution to generate minute irregularities. It is preferable that the surface is roughened by a weight reduction treatment in an aqueous sodium hydroxide solution at 80 to 90 ° C. for 60 minutes. In the case of polyamide fiber, surface treatment is performed with a formic acid solution for roughening. It is preferable to roughen the surface by treating in an aqueous formic acid solution at 55 to 60 ° C. for 60 minutes.

Then, it is dipped in a mixed solution of palladium chloride and tin chloride, palladium is deposited inside the irregularities and fixed by an activation treatment, and the palladium is used as a nucleus to form a metal plating film. As the metal film, copper, nickel, or a composite metal film of copper and nickel is suitable.

Next, the formed metal film is coated with a urethane-based resin, which is sprayed to uniformly coat only the loop surface and the hook surface. The resin adhesion amount is preferably 0.02 to 0.5% by weight with respect to the sheet fastener.
As the urethane resin in the present invention, it is preferable to use an aromatic polyester polyol or an aliphatic polyester polyol as the polyol and an aromatic isocyanate as the isocyanate.

On the other hand, when the metal-plated surface fastener is immersed in the urethane resin solution, the resin solution adheres to the base cloth (tape) in a larger amount than to the individual filaments forming the loops and hooks. , Flexibility is hindered. Further, since a large amount of resin adheres to the hook surface and the loop surface, it lacks flexibility and causes a bad surface such as poor adhesion as a fastener, which is not preferable.

[0013]

By the above method, the multifilament forming the loop coated with the metal film and the monofilament forming the hook to the root of the fastener tape are uniformly coated with urethane resin. As a result, even if the loop surface and the hook surface are repeatedly attached and detached, the metal film does not fall off, and a planar fastener having good conductivity can be obtained.

[0014]

EXAMPLES The present invention will be specifically described below with reference to examples. Example-1 Polyester surface fastener (Kuraray: Velcro)
The loop surface and the hook surface of No. 2 were scoured in a scouring agent 2 / g (WS-20) aqueous solution at 80 ° C. for 30 minutes.
After degreasing, bath ratio 1: 3 in 2% sodium hydroxide aqueous solution
Weight reduction treatment is performed at 0, 85 ° C. for 60 minutes.

Next, the catalyst is immersed in a palladium chloride catalyst solution (Catalyst A-30 manufactured by Okuno Seiyaku), washed with water, and then activated in a 10% aqueous sulfuric acid solution. Next, by immersing in an electroless copper plating solution at 38 ° C. for 3 minutes, a uniform copper plating film was projected by 15% owf. (Copper plating bath composition) Copper sulfate 15 g / liter Sodium hydrogen carbonate 10 g / liter Tartrate 30 g / liter 38% Formalin solution 100 ml / liter pH 11.5

After washing with water and drying, 0.5% by weight of a urethane resin solution (Dainippon Ink: Crisbon NX) of an organic solvent solution and 0.03% by weight of a crosslinking accelerator (Dainippon Ink: Crisbon Axel HM). The mixed liquid consisting of was spray-coated on the hook surface and the loop surface so that the amount of the resin adhered was 0.05% by weight, dried, and heat-treated at 120 ° C. for 10 minutes.
The obtained planar fastener was evaluated for adhesiveness by the following method. As a result, as shown in Table 1, there was no peeling and the adhesiveness was good.

(Measurement Method) Gakushin-type friction test: Fried 300 times under a load of 200 g of JIS L 0849. ○ Cellophane tape method: Commercial cellophane tape 5-7c
Cut to m and press firmly on the test surface. After 10 minutes, the cellophane tape was peeled off at once and the transfer to the cellophane tape was visually judged. ○ Peeling durability: Repeat 50 hook and loop surfaces
Detachment was performed 0 times and the peeling of the plating was visually judged.

Comparative Example-1 In the same manner as in Example-1, a polyester surface fastener (Kuraray: Velcro) was refined and reduced, and then electroless copper plating was performed to form a uniform copper plating film with 16% owf protrusion. did. As a result of evaluating the adhesiveness of the obtained surface fastener by the same method as in Example-1, peeling was recognized as shown in Table 1.

[0019] Evaluation: ○ Good △ Slight peeling × Peeling conspicuous

Example 2 The hook surface and loop surface of a polyamide surface fastener (manufactured by Yoshida Kogyo: Quicklon) were immersed in a refining agent 2 g / liter (Daiichi Kogyo Seiyaku: WS-20) aqueous solution at 80 ° C. and 30 ° C. After refining and degreasing for 5 minutes, bath ratio 1: 5 in 5 wt% formic acid aqueous solution
It was treated at 0, 60 ° C. for 30 minutes. Then, it is immersed in a palladium chloride catalyst solution (manufactured by Okuno Seiyaku: Catalyst A-30), washed with water, and then activated in a 10% aqueous sulfuric acid solution.

Then, by immersing in an electroless nickel bath at 40 ° C. for 7 minutes, a uniform nickel-plated film was formed to 20
% Owf broke out. After washing with water and drying, 1% by weight of a water-soluble urethane resin (Dainippon Ink: Hydran AP-60) and 0.2% by weight of a crosslinking accelerator (Dainippon Ink: CR-5L).
The mixed solution was spray-coated so that the amount of resin adhered to the hook surface and the loop surface was 0.3% by weight, dried, and then heat-treated at 110 ° C. for 10 minutes.

The adhesion of the obtained sheet fastener was evaluated in the same manner as in Example-1. The results are shown in Table 2 and were good with no peeling. (Nickel plating bath composition) nickel hypophosphite 28 g / liter boric acid 12 g / liter ammonium sulfate 3 g / liter sodium acetate 5 g / liter pH 6.1

Comparative Example-2 Similar to Example-2, a polyamide sheet fastener (manufactured by Yoshida Kogyo: Quickron) was smelted and degreased, and then a 5 wt% formic acid aqueous solution was used for a bath ratio of 1:50, 60 ° C., and 30 minutes. Processed. Then, electroless nickel plating was performed in the same manner as in Example-2, and as a result, a uniform nickel film was deposited by 18% owf.
The result of examining the adhesion by the same method as in Example-1 is as follows.
Peeling was observed as shown in Table 2.

Table 2 Evaluation: ○ Good × Peeling is noticeable

[0025]

As described above, according to the present invention, a metal film is formed on a polyester or polyamide planar fastener by electroless plating, and then a urethane resin is sprayed onto the hook surface and the loop surface. By doing so, it is possible to manufacture a planar fastener having a small amount of drying energy and having excellent conductivity without cracking or dropping of the metal film despite the repeated peeling test of many times.

Claims (1)

[Claims] 1. A metal film is formed on a hook surface and a loop surface of a planar fastener made of polyester fiber or polyamide fiber by an electroless plating method, and a urethane resin is applied to the hook and the loop. A resin processing method for a metal-coated planar fastener, which comprises spraying 0.02 to 0.5% by weight.