One of the challenges with using silicone rubber keypads may be that the custom keypads don’t stick to acrylic surfaces. When a stationary silicone rubber keypad is vital to the design and use of the acrylic product, new technology can be used to solve this problem. A special adhesive coating can be applied to the custom keypads so that they stick to the product’s acrylic surface.
One of the features of liquid silicone injection molding is its durability. Because a rubber keypad has some give to it, it works well with hard objects, such as acrylics. During the assembly process of all parts must be lined up precisely in order for the design to work. After the rubber keypad has been created, the special adhesive coating is applied. During the assembly process, the custom keypads are placed and secured. Other parts, such as covers or frames, can then be added.
Bonding silicone rubber molding and acrylic became an issue with the increased use of the membrane switch industry. The underside of the silicone rubber array doesn’t bond well with the surface, which made many designs inefficient. Similar to applying a piece of cellophane tape to a brick or liquid surface, the product would not stick together. The creation of a new and modern adhesive coating fixes this problem, allowing bonding between liquid silicone injection molding components and acrylics. It is resistant to high humidity, extreme temperatures and many solvents. As a result, membrane switches can be used more widely.
The use of this bonding coating on custom rubber keypads has been adapted to many different types of products, including those in telecommunications, automotive, laboratory instrumentation, industrial equipment, consumer electronics and aerospace. Since the technology was developed by a company that is International Traffic in Arms Regulations (ITAR) certified, it can also be used in many military-related products.
When creating a design that uses silicone rubber keypads and acrylic materials, the designer may wish to use colors, rather than have a clear product. Liquid silicone injection molding can be color matched to nearly any shade using specially designed inks. As a result, the product can be any color requested, with a second color of printed lettering on the rubber keypad showing up clear and legible, unaffected by the adhesive coating.
Custom rubber keypads come in many shapes, sizes and designs. Their versatility may be used with a variety of different materials, including plastic, metal and now acrylic.
Post time: 06-14-2017