What is the membrane keypad panel or graphic overlay?

Characteristics and structure of graphics overlay

Graphic overlay is a popular word mark and trademark that integrates decoration and functionality in recent years. Print established graphics, text descriptions, transparent windows, etc. on flexible plastic materials such as PVC, PC, PET, etc., and paste different types of double-sided tape to make plastic products used for identification and protection. The film panel has beautiful appearance, clear pictures and texts, and good airtightness. It has the characteristics of waterproof, anti-deformation, anti-pollution, anti-high temperature and strong viscosity. Widely used in intelligent electronic measuring instruments, medical instruments, computer control, CNC machine tools, electronic weighing apparatus, post and telecommunications, copiers, refrigerators, microwave ovens, electric fans, washing machines, electronic game consoles and other industrial and household appliances products.

Features of membrane keypad panel:

The membrane panel uses different materials, which determine its price and performance. The most important feature of the film panel made by silk screen printing is:

1. Clear and intuitive graphics and text, and can adapt to different planes and curved planes.

2. The choice of different materials can make PC, PET and other materials.

3. The film panel has the characteristics of waterproof, anti-deformation, anti-pollution, anti-high temperature, and strong viscosity.

membrane panel structure:

Graphics overlay layer

The top layer is generally made of exquisite patterns and text printed on colorless transparent sheet materials such as PET and PC less than 0.25MM. Because the main function of the panel layer is to play the role of identification and keys, the selected material must have high transparency,High ink adhesion, high elasticity, anti-folding and other characteristics.

Adhesive layer on the back

The main function of the bottom layer is to closely connect the panel layer and the circuit layer to achieve the effect of sealing and connection. The thickness of this layer is generally required to be between 0.05 and 0.25 mm, with high viscosity and anti-aging properties; in production, Generally, special membrane switch double-sided adhesive is used. Some membrane panels require waterproof and high temperature resistance. Therefore, the primer layer must also use materials of different properties according to needs.