Optically Clear Adhesive Film
- Material: Acrylic OCA pressure-sensitive adhesive
- Appearance: Clear, colorless optical grade
- Thickness range: 25–250 μm
- Release liner: PET liner, single or double side
- Typical optical data: ≥99% transmittance, ≤1.0% haze
- Main use: Display bonding and touch panel lamination
Protective Film Rolls Company manufactures optically clear adhesive film for optical bonding inside display assemblies. This OCA film bonds cover glass, touch sensors, LCD/OLED modules, PET films and transparent conductive layers where clean lamination, low haze and stable optical clarity are required. With typical internal reference values of ≥99% light transmittance and ≤1.0% haze, it supports bubble-controlled bonding for touch panels, HMI displays and display module production.
Product Overview
This film is made for internal optical bonding, not outer screen protection. In a display stack, it works as a clear adhesive layer between cover glass, touch sensor film, optical PET, PMMA, PC and LCD/OLED modules. A common structure is cover glass / OCA / touch sensor / display module.
OCA holds layers together while improving the optical path. By filling the space between transparent layers, it helps reduce interface reflection, improve contrast and keep displays readable in bright environments. This is useful for automotive screens, industrial HMI panels and touch modules that need stable brightness and color consistency.
Production conditions affect the result. The film can be used with clean surface handling, roller lamination, vacuum de-bubbling and autoclave finishing. For printed cover glass, adhesive thickness should be checked against the ink step height. For PC and PMMA lens parts, grade selection matters because plastic outgassing may create micro-bubbles after bonding.
Benefits
- High optical clarity: Maintains high transmission and low haze after lamination.
- Cleaner bonding: Reduces trapped air when surfaces, pressure and de-bubbling are controlled.
- Better readability: Limits internal reflection and improves contrast.
- Substrate compatibility: Bonds glass, PET, PC, PMMA, touch sensor film and selected conductive films.
- Stable appearance: Helps reduce clouding, whitening and edge lifting.
- Flexible converting: Available in rolls, sheets, slit rolls or die-cut parts.
- Practical thickness choice: 25–250 μm options help match gap depth and printed border design.
How does OCA optical bonding improve display clarity?
OCA optical bonding improves display clarity by replacing the air space between cover glass, touch sensor and display module with a transparent adhesive layer. When air remains inside the structure, light reflects at each surface and the image can look weaker under bright conditions. A low-haze bonding layer gives the display a cleaner optical path, supporting sharper images, stronger contrast and stable color performance.
TDS
Item | Typical Specification |
Product type | Optically clear adhesive film / OCA film |
Adhesive material | Acrylic pressure-sensitive adhesive |
Appearance | Clear, colorless, no visible particles |
Standard thickness | 25 μm, 50 μm, 75 μm, 100 μm, 125 μm, 175 μm, 250 μm |
Light transmittance | ≥99% typical, grade dependent |
Haze | ≤1.0% typical, grade dependent |
Release liner | PET release liner |
Peel strength | Medium to high, grade dependent |
Suitable substrates | Glass, PET, PC, PMMA, touch sensor film, transparent conductive film |
Lamination method | Cleanroom handling, roller lamination, vacuum de-bubbling, autoclave finishing |
Ink step suitability | Grade and thickness dependent |
Operating temperature | Approx. -20°C to 80°C, grade dependent |
Key properties | High clarity, low haze, stable wet-out, bubble-controlled bonding |
Typical structure | Cover glass / OCA / touch sensor / display module |
Available format | Roll, sheet, slit roll, die-cut part |
Test reference | ASTM D1003 or equivalent methods |
Applications
- Cover glass bonding for LCD and OLED modules
- Touch panel lamination for capacitive touch displays
- Optical bonding layer for industrial HMI panels
- Automotive center displays and dashboard screens
- Touch sensor bonding with PET or conductive film
- Optical adhesive layer for smart home panels
- Glass, PMMA or PC lens panel bonding
- Full lamination requiring low haze and stable clarity
What should be checked before touch panel lamination?
Before touch panel lamination, review substrate type, surface cleanliness, adhesive thickness, liner handling and final bonding structure. Glass, PC, PMMA, PET film, touch sensor layers and transparent conductive films may behave differently under pressure, heat or vacuum de-bubbling. For a cleaner result, the OCA film should match the gap depth, printed border height and lamination method. For PC and PMMA lens panels, outgassing risk should be checked before grade selection.
Production Line
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FAQ
What is optically clear adhesive film used for?
It is used as a transparent adhesive layer inside display assemblies, bonding cover glass, touch sensors, optical films and display modules while keeping the bonding area clear and low haze.
Is this film the same as a screen protector?
No. It is not an outer surface protection layer. It is an internal optical bonding material for display bonding and touch panel lamination.
Can it help reduce bubbles during lamination?
Yes, with the correct grade and process. Clean surfaces, suitable thickness, controlled pressure, vacuum de-bubbling and proper liner handling help reduce trapped air.
What details are needed before selecting a grade?
Useful details include bonding structure, substrate material, thickness, ink step height, operating temperature, optical requirement, final part size and whether the structure uses glass, PET, PC, PMMA or conductive film layers.
