CN1324699A

CN1324699A - Rubber surface treating process

Info

Publication number: CN1324699A
Application number: CN 00107747
Authority: CN
Inventors: 王祥华
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-05-24
Filing date: 2000-05-24
Publication date: 2001-12-05

Abstract

The rubber surface hardening treatment method is characterized by including: scarfing rubber surface and applying bridge-forming agent (polyester resin) capable of plasticizing surface to make baked rubber surface produce hardened layer like surface of plastic product, then electroplating the surface of said hardened layer to make it identical to surface of plastic product which can be printed and treated, and can raise strength and toughness of rubber.

Description

A kind of rubber surface treating process

The present invention relates to a kind of rubber surface treating process, refer to the conductive rubber surface treatment method of a kind of electronic product button bottom especially.

The employed button of electronic product, as mobile telephone, computor-keyboard, computer button etc., a chimeric plastic cement loam cake on the conductive rubber bottom all being, why its bottom uses the rubber material, the rubber high resilience that results from contacts with printed circuit board (PCB), unlikely causing as the high damage easily of hardness as plastic cement circuit card, the design of plastic cement loam cake again, because of its hardness height, attrition resistant characteristic of tool and excellent sense of touch, then be that the rubber material is incomparable, therefore on the computor-keyboard button not have that the rubber material occurs promptly be this reason, and following three kinds of buttons commonly used are arranged on the market at present;

1, be directly promptly being embedded in a silastic surface (as shown in Figure 1) with silica gel ink printing printing ink after roasting on the conductive silicon rubber, this kind product now is widely used in as the telepilot of cheapness or robot calculator.

2, another product button that then a chimeric plastic cement is made on conductive rubber lid is applied to (as shown in Figure 2) such as computor-keyboards.

3 and be used for the button of mobile telephone, then on the conductive silicon rubber surface, fit one with the identical shaped sheet (as shown in Figure 3) of rubber key.

Above-mentioned manufacture method and flow process, loaded down with trivial details increase cost of process and process period, and conductive silicon rubber (or claiming conductive rubber) is to be used in material the most feasible on the button at present, and this conductive silicon rubber is because the material relation, can't on rubber surface, make as the plasthetics screen painting, transfer printing, electroplating effects such as paint spraying and baking, sulfidic material in its combination molecule of rubber material is for electronic component in addition, beyond doubt as a land mine, make finished product after discharge under the thermophilic situation of being everlasting at elastomeric material, make electronic component produce oxidation, and then destroy electronic circuit.

The inventor is because above-mentioned manufacture, progress and cost for industry all need be paid great cost, and do not meet the economic benefit of a large amount of manufacturings, therefore the inventor is itself to be engaged in rubber key manufacturing experience for many years, and understand the characteristic of rubber material in depth, it can't use electroplates work program and makes gloss and texture as plasthetics, all be the singularity that locks on the material, through repeatedly experiment and actual test, finally develop " rubber surface treating process " of the present invention, this method can make the rubber-like material make the effect of electroplating processes on top layer.

Main purpose of the present invention is providing a kind of rubber surface treating process, it can effectively reform problems such as plastic cement printing that former rubber material can't handle, plating, remove the sense of touch that to possess former rubber, and make it reach hardness surface and gloss as plastic cement material, be able on its product, do multiple processing treatment.

Of the present invention time a purpose is to provide a kind of rubber surface treating process, and rubber item is done can avoid electronic component to produce oxidation after handle on the surface through this method.

For reaching above-mentioned purpose, technical scheme of the present invention is: a kind of rubber surface treating process, it is characterized in that rubber surface is added sulphur with 150 ℃～200 ℃ high bakes timing constant temperature secondaries, and at rubber surface flame baking closely, the vibrin bridging agent on coating plasticization surface, make rubber surface be hardened layer through baking, surface as plasthetics, surface electroplating processing again by hardened layer, make the surface of rubber tool plasthetics, and can make multiple printing and electroplating processes, increase rubber intensity and toughness.

Feature of the present invention is that also hardened layer remakes transparent processing.

Plating comprises following work program: vacuum plating processing, water power plating processing, water transfer process, the processing of spraying paint, baking vanish are handled.

Alleged rubber can be natural rubber, synthetic polyisoprenes rubber, isoprene-isobutylene rubber, silicon rubber, polyethylene, acrylic-nitrile rubber, divinyl rubber, benzene butylene divinyl rubber, the flat rubber of chlorine, chlorination (bromination) isoprene-isobutylene rubber, ethylene-propylene rubber, chlorsulfonic acid polylefine rubber, ECD, Viton, CALCIUM ACRYLATE rubber etc. among the present invention.

The present invention adds the sulphur mode owing to adopting with secondary in manufacturing processed, make the sulfide gasification volatilization in the rubber material behind high bake, can avoid electronic component to produce oxidation thus.

Through using the rubber item of this manufacture method, the advantage following as tools such as button, key panels:

1, more traditional rubber key has more wear resistance and surperficial difficult drop-off;

2, more traditional rubber key hardness is higher, has preferable sense of touch;

3, have more gloss than traditional rubber key, and can make kinds of surface at the button face and handle;

4, the rubber material is increased the service life, and solve processing and cost problems such as needing the applying sheet.

For enabling more to understand characteristics of the present invention and manufacturing course, conjunction with figs. is further elaborated now.

The accompanying drawing simple declaration:

Fig. 1: be the staple stereographic map;

Fig. 2: the sectional view that is another staple;

Fig. 3: the sectional view that is another staple;

Fig. 4: be schematic flow sheet of the present invention;

Fig. 5: be that the present invention electroplates and concerns synoptic diagram;

Fig. 6: be structure sectional view of the present invention.

See also shown in Figure 4; manufacturing process of the present invention is heat moulding and a conduction grain of a kind of rubber raw materials; make the secondary sulfur adding treatment through the baking decon; then in bake process, produce the gasification volatilization; and spray attached bridging agent vibrin at rubber surface; make its surface hardening through constant temperature (150 ℃～200 ℃) baking; this moment is with surface hardened rubber semi-finished product already; enter the galvanizing process processing treatment again; and this moment, rubber semi-finished product can make transparent rubber or screen painting has transparent color rete according to product property; select laser engraving font (as the key number of mobile telephone), make protective layer in surface of semi-finished and handle, so far finish whole manufacturing course.

Please consult shown in Figure 5ly again, foregoing " plating " is to comprise following work program: vacuum plating, water power plating, water transfer printing, transfer prints, are sprayed paint, baking vanish, generally application etc.

See also Fig. 6, its surface of button after treatment presents as the hardened layer 11 as the plastic cement material, rubber after surface hardening, so could make electroplating processes, and the soft whippy speciality of rubber is also possessed in the bottom 12 of hardened layer 11, therefore only uses this manufacture method, can provide the surface hardness of plastic cement, and tool caoutchouc elasticity speciality, 12 bottoms, bottom of hardened layer 11 have conduction grain 13 among Fig. 6.

In sum, the invention provides a kind of rubber surface treating process, it has solved high and the loaded down with trivial details and costly shortcoming of manufacturing process of tooling cost in the common technology, and make rubber surface that the characteristic of plastic cement hardness be arranged, more by its case-hardened result, make and to do, make rubber have good gloss and sense of touch, be rare innovation as secondary processing such as plating.

Only the above only is part embodiment of the present invention, limits the scope of the invention when not being able to this, uses the described content of present disclosure such as, does the change of equivalence, all belongs in the scope of the present invention.

Claims

1, a kind of rubber surface treating process, it is characterized in that rubber surface is added sulphur with 150 ℃～200 ℃ high bakes timing constant temperature secondaries, and at rubber surface flame baking closely, the vibrin bridging agent on coating plasticization surface makes the rubber surface through baking be hardened layer, as the surface of plasthetics, surface electroplating processing again by hardened layer, make the surface of rubber tool plasthetics, and can make multiple printing and electroplating processes, increase rubber intensity and toughness.

2, the method for claim 1 is characterized in that hardened layer remakes transparent processing.

3, the method for claim 1 is characterized in that plating comprises following work program: vacuum plating processing, water power plating processing, water transfer process, the processing of spraying paint, baking vanish are handled.

4, the method for claim 1 is characterized in that rubber is to be selected from natural rubber, synthetic polyisoprenes rubber, isoprene-isobutylene rubber, silicon rubber, polyethylene, acrylic-nitrile rubber, divinyl rubber, benzene butylene divinyl rubber, the flat rubber of chlorine, chlorination or brominated butyl rubber, ethylene-propylene rubber, chlorsulfonic acid polylefine rubber, ECD, Viton, CALCIUM ACRYLATE rubber.