Membrane switchIs a key function, indicating device, instrument panel for the integration of a control system.Is to usePC，PET，FPCAnd double-sided adhesive and other soft materials, using screen printing technology is made and be become more plane combination seal mark symbols set of graphics, buttons, display, electrical and electronic switch function in the integration of plastic electronic products.Widely used in electronic communications, industrial control, medical equipment, automotive industry, instruments and meters, household appliances, children's toys, military equipment and other industries and fields.
Membrane switch switch ZhiDeXing preferred
Common membrane switch of each parts material
A, panel layer
Panel layer below0.25MMthePET、PCColorless transparent sheet material such as silk screen on the exquisite design and words, because of the action of the main panel layer is the logo and key role, so the selection of material must have high transparency, high ink adhesion, high elasticity, high toughness, etc.
Second, the surface glue line
Rubber is the role of the main panel layer is closely linked with the circuit layer, to achieve the effect of sealing and connecting, this layer thickness in general requirements0.05---0.15MMBetween, has high viscosity and the aging;In production, generally choose special membrane switch two-side glue, some can waterproof and high temperature membrane switch, so the surface glue also must according to the need to use different materials.
Three, the control circuit of the upper and the lower level
This layer adopt good performance of polyester film(PET)As a carrier of the switching circuit graphics and printing on them in a special process on the conductive silver paste and conductive carbon slurry, has the conductivity, its thickness in general0.05--0.175MMwithin,The most common is to use0.125MM PET。
Four, clip rubber
It is in the circuit and the circuit on effect of sealing and the connection between layers,General usePETDouble-sided adhesive,The thickness is0.05--0.2MMRanging from; When choosing this layer material should give full consideration to the overall thickness of the product,insulation,Circuit button bag handle and sealing.
Five, the rubber on the back
Back rubber membrane switch is used to paste is closely related with what material, more commonly used include ordinary double-sided adhesive,3MPlastic, waterproof glue, etc.