Embossing Membrane Switches Graphic Overlays For Internet Touch Screen

Embossing Membrane Switches Graphic Overlays For Internet Touch Screen

Importance of Graphic Overlays

1. User Experience: A well-designed graphic overlay significantly enhances the user experience by clearly indicating the function of each button and providing a visually appealing interface .
2. Branding: The overlay can include logos and colors that represent the brand, making it a vital marketing tool .
3. Durability: Depending on the application, overlays can be designed to withstand various environmental conditions, such as UV exposure, chemicals, and abrasion. This is crucial for maintaining functionality and appearance over time .

Design Considerations

• Material Selection: The choice of materials for graphic overlays is influenced by the intended use. Options include:

  • Polyester for standard applications
  • Metalphoto anodized aluminum for rugged environments
  • Acrylic or glass for enhanced durability .

• Finishes and Effects: Overlays can be produced with various finishes (glossy, textured, anti-glare) and can incorporate special printing effects like gradients and photographic images .

• Embossing: This technique can enhance tactile feedback and visual appeal by creating raised areas on the overlay, which can help users identify buttons more easily .

• Lighting Options: Many overlays can accommodate backlighting, which improves visibility in low-light conditions. Options include LED and fiber optic lighting .

Applications

Membrane switches with graphic overlays are widely used in various industries, including:

• Medical devices
• Consumer electronics
• Industrial equipment
• Automotive controls

Lexans spec :
 
Material

• Common materials include vinyl, polyester, polyimide (Kapton), and polyethylene terephthalate (PET) films.
• The material needs to be durable, chemical/solvent resistant, and able to withstand temperature extremes.

Adhesive

• Pressure-sensitive adhesives like acrylic or rubber-based are common.
• The adhesive must have strong bonding strength to adhere securely to various surfaces.
• It should also resist peeling, lifting, and degradation over time.

Thickness

• Typical sticker thicknesses range from 2-10 mils (0.002" to 0.010").
• Thicker stickers are more durable but may impact conformability to uneven surfaces.

Size & Shape

• Industrial stickers come in a wide range of standard and custom sizes.
• Common shapes include rectangles, squares, circles, ovals, and die-cut custom shapes.
• Size is selected based on the specific application needs.

Here are some examples of common Lexan polycarbonate products used for industrial overlay and enclosure designs:

1. Lexan FMR (Flame Mitigating Resin) Sheets

• Formulated with flame-retardant additives to meet stringent fire safety standards
• Often used for control panel faceplates, switch plates, and equipment housings
• Available in clear, tinted, and opaque color options

2. Lexan EXL Impact-Modified Sheets

• Engineered for superior impact resistance and toughness
• Ideal for overlays, bezels, and enclosures that need to withstand abuse
• Maintains optical clarity and dimensional stability under impact

3. Lexan HPS (High Performance Sheet)

• Offers excellent chemical, temperature, and UV resistance
• Used for outdoor equipment, harsh environment enclosures
• Can be metallized or coated for specialized surface finishes

4. Lexan ML (Matte Low-Glare) Sheets

• Matte surface finish reduces glare and reflections
• Enhances readability of control panel graphics and displays
• Maintains clarity and scratch resistance of standard Lexan

 
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