Talking Silk Screen Printing of Membrane Keyboards

The membrane switch panel screen printing is similar to the general plastic film screen printing, and the printing film is pre-pressed before printing. In addition, the graphic and the like are printed on the back of the panel, that is, printed on the non-touch surface of the panel to ensure that the graphic on the membrane switch panel is clear and free from wear. There are many varieties of plastic inks, but the performance varies.

The panel layer of the membrane switch adopts a single-faced matte polycarbonate film, and the screen, the symbol, the color block and the like are printed on the glossy surface of the polycarbonate film by the screen printing method. They act as nominal, decorative and cues on the panel. Therefore, different process measures must be taken in the production of the screen.

Regarding the keyboards, the text on the panel plays an important role in indicating functions, transmitting instructions, and stating the content. It requires the smoothness of the screen printing edge and the integrity of the stroke. Therefore, the film layer of the text screen must have a certain thickness to ensure the thickness of the ink layer of the screen printing, so that the writing is clear, durable, eye-catching and beautiful. Different thicknesses of the photosensitive film are suitable for different occasions.

For fine text, a thin film should be used to improve the sharpness of the writing; light text or direct printing of the three primary colors requires the film to be thicker, so that the hue is more pure. In addition, the membrane layer of the membrane switch is usually provided with a transparent window, and its function is to provide the establishment of a certain switch function and reflect the working state of the whole machine, so that the operator or other personnel can monitor the whole machine.

In terms of technology, the transparent window should enhance the luminous effect of the LED and LCD, which of course is related to the transparent ink color that matches the wavelength of the selected light-emitting element. From the perspective of preparing the transparent window screen, China Kaike Electronics membrane switch should adopt the direct method plate making. For example, the use of diazo photosensitive adhesive should be thin and thin. At the same time, the screen should also be a thin wire mesh, which is transparent. The ink layer is thin and uniform to maintain the display effect of the light-emitting elements.