Thin film panels are a kind of commercial and industrial products that have been popularized internationally in recent years. The thin film panels integrate the functions of decoration and functions and can be applied to commercial marking and product marking. What are the precautions for thin-film panel design?
Thin film panel design considerations
1. The shrapnel of the membrane switch bulge button needs to be placed properly, and there can be no offset, otherwise it will affect the operation of the button to failure.
2. Color problems: The modulation ratio of ink is the main cause of serious color deviations, and there are also strict color requirements. The range of colors is too small. These are factors that are difficult to control in any industry. In terms of the cost of controlling the company, to achieve a very small range of colors, the cost to be paid is extremely high, the cost of the product is increased, and the unit price of the product is also correspondingly increased. It is also difficult for the customer to accept it. The range of color needs to be within a reasonable range.
3, the button bulge position, you need to open the mold to a suitable location, otherwise it will affect the appearance of the button. Adhesive is not sticky, in addition to the choice of raw materials, but also to confirm the shape of a good prototype. If the prototype has a groove, you need to select good quality adhesive. The choice of gum can be appropriate.
Membrane switch features
(1) Durability
The life of a membrane switch can generally reach more than one million times. The reason why such a switch has such a long life is that the switch action is only achieved by the elastic membrane in the vertical direction. Although the elastic film has been peristalized by millions of times, the creep range is only 0.1 to 0.3 mm (both switching strokes), and the material selection is far from the yield limit of the film. Can withstand more than one million life without deformation. On the other hand, the contact of the switch is vertical and the amount of wear is very small; the screen-printed contacts can form a sufficient thickness, and a layer of conductive carbon is added on the silver paste contacts to achieve high Wear-resistant, self-lubricating purpose, so the life of the membrane switch is more than a dozen times more than the mechanical contact switch.
(2) good sealing performance
Because the membrane switch is an overall hermetic structure, the contacts of the switch are not eroded by harmful gases and are not easily oxidized. The membrane is waterproof and dustproof, and thus is more suitable for various harsh environments.
(3) Small size, light weight and reliable structure
Membrane switches can be arranged and assembled into a membrane keyboard in a design, and the density of the membrane switch is large. Moreover, it is a sealed sheet structure in which a plurality of layers of thin films are combined. The connecting lines and lead wires between all the switches are screen printed at one time. Completed, the total thickness is 1~3mm, so the volume is reduced, the quality is reduced, and the reliability is improved.
(4) Rich colors and beautiful appearance
Membrane switch can be personalized according to the user's design concept in the design of the color pattern, the decorative effect reflects the material beauty, decorative beauty, craftsmanship and comprehensive characteristics.
(5) Reduce the cost of supporting electromechanical products
Traditional mechanical switches require welding during installation, even with fixed brackets. The membrane switch is installed as a paste type, as long as the adhesive paper is peeled off, it can be firmly stuck on the surface of the whole machine, and the lead outlet of the membrane switch is inserted into the socket of the rear circuit of the complete machine, and the circuit can be connected in an instant. Provincial workers, provincial materials, reduce the overall cost of the machine.
The material and characteristics of the membrane switch panel
1. Polyvinyl chloride (PVC) is stable at room temperature for acids, alkalis and salts. Good wear resistance, flame resistance, self-extinguishing, noise reduction and vibration elimination, good electrical insulation. Poor thermal stability.
2, sand surface polyester (PET), good chemical resistance, insoluble in common organic solvents, not alkali. Has excellent mechanical properties, electrical properties, rigidity, hardness and thermoplastics the greatest toughness, low water absorption, wear resistance, excellent friction resistance, high dimensional stability. Tensile strength can be comparable to aluminum film, much higher than PC, PVC. Because the surface is hard to be processed into a matt type, the texture PET is more expensive and is the ideal substrate for making a membrane switch circuit. Among them, textured PET is suitable for products with a higher surface requirement or a liquid crystal display window.
3, polycarbonate (PC), high light transmittance, low water absorption, good dimensional stability, excellent bending, tensile, compressive strength, heat resistance, cold resistance, electrical insulation and resistance to atmospheric aging . Poor chemical resistance, poor fatigue resistance, easy to produce stress cracking, output interface circuit is generally made of carbon printed material, and there is no protective coating, gradually formed by the air oxidation shedding layer, and finally lead to a broken circuit End of life, this is where the membrane switch is most likely to fail. It is primarily determined by the environment. Physical or mechanical damage takes anywhere from 3 to 10 years, whether or not it is used. The general scope of application is the most extensive. Except for satisfying the requirements of most membrane switch panels, the high light transmittance of the glossy PC can meet the requirement of the LCD display window.
Summary: The above is the content of the film panel design considerations and features introduced by Xiao Bian for everyone. We hope that we can help you effectively. If you have any good suggestions, look forward to communicating with Xiao Bian. For more information, please pay attention. This site.
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