Membrane Materials Usage Guide for Membrane Switches & Capacitive Touch Switches

Graphic Overlay Film Materials:

PET (Polyester)

Brands: Autotex, Toyobo, Toray, Mitsubishi, etc.
Typical Thickness: 0.188mm, 0.125mm
UV resistance treatment required for outdoor applications
Suitable for antibacterial treatment
Additional treatments available: brushed and anti-glare
Enhanced surface hardness for scratch resistance

PC (Polycarbonate)

Brands: Sumitomo, Bayer, GE, etc.
Thickness: 0.175mm, 0.25mm
More scratch-resistant than PET
Enhances the product’s texture
Higher price range

PET film is commonly used for its versatility and durability, making it an excellent choice for various applications, including outdoor environments where UV resistance is crucial. PC film, on the other hand, offers a premium feel and enhanced scratch resistance but comes at a higher cost.

Capacitive Touch Switch Graphic Overlay Materials:

Acrylic

High transparency
Economical pricing
Limited heat resistance

Glass

High transparency
Enhances product texture and durability
Higher cost

Acrylic offers a cost-effective solution with excellent transparency, though it has limited resistance to high temperatures. Glass provides superior durability and a high-quality feel but is more expensive.

Circuit Film Materials:

PET Film

Brands: Sichuan Dongfang, Toyobo, Mitsubishi, Toray, etc.
Insulation Capability: Greater than 10^12 ohms
Common Thickness: 0.125mm, 0.1mm
Requires surface treatment for ink adhesion

PET film used for circuit layers is selected for its high insulation properties, ensuring reliable performance in electronic applications. Surface treatment is necessary to ensure consistent ink adhesion during the printing process.

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