The structure of the membrane switch tells you quietly

　　Membrane switch, also known as touch keyboard, adopts an overall sealed structure composed of multiple layers of planes. It is a new type of electronic component that integrates optics, machinery and electricity, sealing the key switch, panel, mark, symbol display and lining together. Next, we will explain the structure of membrane switch to you.This shows that, membrane switch It has a strong development pulse and is an indispensable source of power for the development of the industry. https://singway-touch.com/

　　

　　membrane switch structure

　　

　　1. Panel layer

　　

　　The panel layer is generally a colorless and light-transmitting sheet of less than 0.25MM such as PET and PC with exquisite patterns and texts printed on it. Because the main function of the panel layer is to play the role of marking and button, the selected material must have high transparency. , high ink adhesion, high elasticity, high toughness and other characteristics.

　　

　　2. Surface adhesive layer

　　

　　The main function of the surface adhesive is to tightly connect the panel layer and the circuit layer to achieve a sealed connection. This layer is generally required to be between 0.05-0.15MM thick and have high viscosity and anti-aging properties; special membrane switch double-sided adhesive is generally used in production. Some membrane switches need to be waterproof and high temperature resistant. Therefore, the surface adhesive must also use materials with different properties according to needs.

　　

　　3. Upper and lower layers of the control circuit

　　

　　This layer uses high-performance polyester film (PET) as the carrier of the switch circuit pattern, and uses a special process to screen-print conductive silver paste and conductive carbon paste on it to make it conductive. Its thickness is generally within 0.05-0.175MM, and the most common is 0.125MMPET.

　　

　　4. Interlayer

　　

　　It is located between the upper circuit and the lower circuit layer, and plays a role in sealing and connecting. Generally, PET double-sided tape is used, and its thickness ranges from 0.05 to 0.2MM; when selecting the material of this layer, the integrity of the product should be fully considered. Thickness, insulation, circuit key package feel and sealing.

　　

　　5. Adhesive layer

　　

　　The use of adhesive is closely related to the material to which the membrane switch is attached. Commonly used ones include double-sided adhesive, 3M adhesive, waterproof adhesive, etc.

Count the Different Production Techniques of Medals and Badges_

　　The varieties of medals and badges are generally determined by their different production processes. The most common production processes for medals and badges include enamel, paint, imitation enamel, stamping, screen printing, die-casting, etc. Today, we will introduce different production processes and their characteristics.In the past ten years, custom medals for awards Defeated many competitors, courageously advanced in the struggle, and polished many good products for customers. https://www.karonmetal.com

　　

　　

　　1. Production process – enamel

　　

　　As the most advanced coloring process, enamel is said to have been first recorded in the Yuan Dynasty, was most refined in the Ming Dynasty, and was already flourishing in the Qing Dynasty. Enamel badges, also known as cloisonn└ badges, are colored with enamel powder on red copper (purple copper). The color is dark and single, the cost is high, and it is fragile and cannot be knocked or faded by gravity. However, because of its strong color fixation and long preservation time, it is generally chosen to make commemorative medals that need to be preserved for a long time without fading, badges, medals, medals, etc. for state organs, military police, etc.

　　

　　2. Production process – imitation enamel

　　

　　Imitation enamel badges are generally colored with resin paint. The color is brighter than enamel and can be made of copper, zinc, alloy, etc. as the base material, with a strong sense of concave and convex. Soft enamel badges and resin are coloring materials developed by foreign experts. The surface can be plated with various metal colors such as gold and nickel. It is smooth and delicate, giving people a very noble feeling. It is suitable for high-end badge customization, mid-to-high-end commemorative medal production, commemorative medals and other exquisite products.

　　

　　How to distinguish enamel from imitation enamel: Real enamel has a ceramic texture, less color selection, and a hard surface. Puncture the surface with a needle will not leave marks, but it is easy to break. Imitation enamel is soft, and a needle can pierce the fake enamel layer. The color is bright, but it cannot be preserved for a long time. After three to five years, the color will turn yellow after high temperature or ultraviolet radiation.