True and false metal buttons
Today's buttons are ever-changing in variety and variety. Button makers have tried their best to meet the needs of the market. Metal, ceramic, coconut, shell, plastic, etc., and even create scented buttons. The sentence really said: "I can't do it, I can't think of it."
At present, the market has a seemingly glittering, metallic button that looks just like a metal button. It's exactly the same, but when you pick up this beautiful button, you feel the so-called "" Metal buttons have a light weight in their hands, and they do not have the heavy feeling of metal buttons. If you compare them carefully, you will find that this beautiful "metallic button" is actually not a metal but a plastic one. It is a metal color plating on the plastic surface. Electroplating is an important process in the manufacture of metal buttons. Metals can be electroplated, can plastics not be electroplated? Through the electroplating factory insiders understand that the answer is yes. Originally, it was not easy to coat metal coats on plastic products because the expansion coefficient of plastics and metals was not the same. Plastics are also an insulator. It is difficult for ions to enter, plastics are afraid of heat, and the temperature is high and easy. Meltwater. Therefore, it is not possible to directly plate the metal on the surface of the plastic product. Later, at any time of technological innovation, people invented a new type of plastic called “ABSâ€. When this plastic hits chromic acid, the surface will be corroded, resulting in many micropores (coarse process called coarsening). Chemical methods can be used to deposit stannous chloride, silver nitrate and copper sulfate into micropores represented by corroded plastic products, so that a layer of conductive metal film can be attached to the plastic surface. With such a conductive layer, it is possible to coat a metal coat such as nickel-chromium on the button by electroplating. It's easy to distinguish between metal-plated plastic buttons and real metal buttons. Since plastic doesn't have metal weight, you can feel the weight of your hands by hand, even if you don't see the weight, or use it directly. Said, of course, can also pass SGS material inspection report to detect and so on. Although the plastic buttons have a metal layer that resembles a metal button, they will never achieve the heavy metal-like texture of the metal buttons, nor the hardness of the metal, so they cannot replace the position of metal buttons. Personally feel that high-end clothing, then generally do not choose such buttons, but this type of button wins in the low cost, and the surface looks like a metal button, so in the low-end button products still have a certain market.
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