• Graphic overlays
• Membrane switches
• Backlighting
• Backplates

The graphic overlay indicates the location of the keys and is the esthetic component of the keypad or device. Memtronik Innovations selects the best inks and most appropriate materials to manufacture them. Graphic overlays, which are particularly necessary for membrane switches, are also useful for instruments with mechanical keys, product identification, labels, and dashboards.

• Materials

  The most widely used materials are polycarbonate and polyester.

  Polyester :

  • Highly versatile for embossing
  • Highly resistant to chemicals
  • Better durability
  • For internal and external use

  Polycarbonate :

  • Wide range of surface finishes and thicknesses
  • More cost-effective
  • For internal and external us
    
    

  	Polyester	Polycarbonate
  Mechanical resistance	Very high	Acceptable
  Chemical resistance	Very high	Very high*
  Thermal resistance	Acceptable	High
  Abrasion resistance	High	Acceptable
  UV resistance	Available	Available
  Dielectric property	High	High
  Malleability	Very high	Acceptable
  Range of finishes	Restricted range	Wide range
  Transparency	Acceptable to high	Acceptable to high
  Cost	High	Low

  * The material loses its chemical resistance if embossed.

  Finishes:
  

  • Gloss :
    • Is very similar to glass
    • Easy to clean
    • Allows for the use of clear windows

  • Textured :
    • Print and scratch resistant
    • Available in different glosses, from semi-gloss to matte
    • Available in a variety of finishes (suede, velvet, brushed, etc.)

  
  
• Embossing

  Graphic overlays can be embossed in order to insert domes (tactile), leave space for mechanical keys and provide tactile indications.

  • Pedestal embossing
  • Rim embossing
  • Pillow embossing
  • Dimple embossing : Braille

  
  
• Windows

  Graphic overlays for devices that have a display are equipped with a window. The transparency of the window can vary depending on the materials uses and the specific requirements of your project. Memtronik Innovations can also print colours and transparent finishes.

  
  
• Adhesive

  The choice of adhesive depends on the surface on which the graphic overlay is bonded. The thickness depends on the texture. A Memtronik Innovations specialist will study your project in detail and design your graphic overlay for maximum bonding.