Double Sided OCA Film for Display Bonding
- Material: optically clear acrylic OCA adhesive
- Structure: no-substrate adhesive with PET release liners
- Thickness: 25um-250um, grade-dependent
- Appearance: transparent, low haze, clean surface
- Format: roll, sheet, kiss-cut or die-cut part
- Use: glass, touch layer, and display module bonding
Films Protective Company is a manufacturer of double sided OCA film for display bonding, supplying optically clear adhesive film for cover glass, touch sensor, LCD/OLED module, HMI, and automotive display lamination. This clear OCA material is made for screen assemblies that need typical >=99% light transmittance, low haze, stable adhesive wet-out, and cleanroom die-cut converting to reduce air gaps, reflection, bubbles, edge lifting, and visible defects.
Product Overview
A clear adhesive inside a display must stay almost invisible after lamination. This double sided OCA film uses a no-substrate acrylic pressure-sensitive adhesive with PET release liners on both sides. It is not a general transparent tape or graphic mounting adhesive. It is used for cover glass, touch sensor, ITO film, optical layer, and LCD/OLED module assemblies where haze, yellowing, particles, liner release, and die-cut edge quality can affect the final screen.
For approval, samples should be tested on the actual cover glass, printed border, touch sensor, or module, not only on a lab panel. Key checks include transmittance, haze after lamination, wet-out near ink steps, bubbles after de-bubbling, edge lifting after dwell time, liner removal stability, and display-on inspection. Retained samples help compare haze, release force, thickness, and lamination appearance from batch to batch.
Benefits
- Typical light transmittance up to >=99%, depending on thickness and test method.
- Low haze, typically <=1.0% by grade, helps maintain brightness and contrast.
- No-substrate adhesive fills the interface and reduces reflection from air gaps.
- 25um-250um thickness options support flat glass, printed borders, and larger modules.
- Cleanroom slitting and die-cut converting help reduce particles, edge burrs, adhesive deformation, and liner defects.
- Stable liner release supports roll lamination, pull tabs, split liners, and defined release direction.
How Should OCA Thickness Be Selected for Glass, Touch Sensor, and Display Module Bonding?
OCA thickness should follow the real bonding structure. A thinner grade, such as 25um or 50um, is often used for flat glass or optical film stacks where low distortion matters. A thicker grade, such as 150um-250um, may be safer when cover glass has an ink step, the touch layer is slightly uneven, or the module needs stress absorption. Before approval, laminate the selected OCA grade onto real samples and review wet-out, bubbles, mura, edge lifting, and adhesive overflow.
TDS
Item | Typical Value |
Product type | Double sided OCA film for optical display bonding |
Adhesive system | Optically clear acrylic pressure-sensitive adhesive |
Structure | No-substrate OCA with double PET release liner |
OCA thickness | 25um, 50um, 100um, 125um, 150um, 175um, 200um, 250um / custom |
Thickness tolerance | Typical +/-5um to +/-10um |
Light transmittance / haze | Typical >=99% / typical <=1.0%, grade-dependent |
Optical test reference | ASTM D1003 or agreed internal inspection method |
Peel adhesion reference | 180-degree peel, ASTM D3330 reference or agreed method |
Release force / liner | Low to medium release / PET liner 50um, 75um, 100um or customized |
Cleanroom converting | Slit roll, sheet, kiss-cut part, die-cut part, pull tab, split liner |
Die-cut tolerance | Typical +/-0.1 mm to +/-0.3 mm, subject to drawing |
Reliability / storage | High temperature and humidity aging, UV aging, 20 C-30 C sealed storage |
Applications
- Cover glass to touch sensor lamination
- Touch panel to LCD or OLED module assembly
- Industrial HMI control panel display bonding
- Automotive center display and dashboard screen assembly
- ITO film, transparent conductive film, and optical layer bonding
- Cleanroom die-cut OCA parts for automated or semi-automated placement
What Should Be Checked Before Cleanroom Die-Cut OCA Parts Are Approved?
Cleanroom converted OCA parts should be reviewed from both the optical side and the assembly side. Outline size is only one checkpoint. Because the adhesive sits inside the visible display stack, inspection should include particles, edge burrs, liner release direction, adhesive deformation, pull tab position, split liner fit, and part spacing. Trial parts should be laminated onto actual glass or touch sensor samples and inspected under display-on conditions. A practical approval standard should confirm low haze, smooth wet-out, no trapped particles, no visible bubbles, no edge lifting after dwell time, and stable liner removal.
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FAQ
Is this double sided OCA film suitable for both glass and touch sensor bonding?
Yes. It is suitable for cover glass, touch sensor, ITO film, LCD/OLED module, and optical layer bonding. Final selection should be confirmed with actual coating, pressure, dwell time, and reliability condition.
How should optical clarity be verified before mass production?
Check light transmittance, haze, yellowness index, and display-on appearance. Finished modules should also be reviewed for bubbles, mura, edge lifting, reflection, and particles.
Can the OCA film be supplied as die-cut parts?
Yes. It can be supplied as slit rolls, sheets, kiss-cut parts, or cleanroom die-cut OCA parts with pull tabs and split liners.
What information is needed before selecting a custom OCA grade?
Useful details include thickness, glass size, touch layer material, printed border height, display type, lamination method, liner thickness, release force, aging condition, and placement method.
