What is OCR and OCA?

What is OCR?

OCR Optical Clear Resin is a special adhesive designed for bonding transparent optical components. The optically transparent resin can fill the gap between the panel and the transparent protective layer and the liquid crystal module to improve the contrast of the display. Compared with the traditional air gap method, this optical resin can suppress light scattering caused by external light and backlight. The optically transparent resin formed by rapid response to UV irradiation has a refractive index and light transmittance similar to glass, resistance to yellowing, softness, and can withstand the expansion and contraction rates of a variety of different substrates, so that it can withstand high and low temperature changes during lamination. problem. This product is suitable for the lamination and assembly of touch screens, large-size glass substrates or other soft and hard boards.

OCR optical resin product characteristics

1. Curing method: ultraviolet light UV curing, combined with point and surface light sources;

2. Chemical system: acid-free colloid, compatible with ITO;

3. Ease of use: Dispensing or other corresponding coating methods can be selected;

4. Repair ability: It has the characteristics of being reworkable before being completely cured;

5. Optical characteristics: high optical penetration characteristics and matching refractive index;

Other characteristics: low hardness, low shrinkage, low haze (Haze).

It is especially suitable for the lamination of large-size glass substrates or other rigid boards. It is characterized by ITO compatibility and rework ability. Curing method: UV curing acid-free colloid, with ITO-Compatible characteristics, rework ability and ease of use: it can be glued or coated by other methods with high optical penetration characteristics to improve the impact resistance of the glass substrate

What is OCA?

OCA (optical clear adhesive) some people call optical clear adhesive, some people call optical clear adhesive.

OCA is made of optical acrylic adhesive without a substrate, and then a layer of release film is attached to the upper and lower bottom layers. It is a double-sided adhesive tape without a substrate. Its excellent clarity, high light transmittance (total light transmittance> 99% or more), high adhesion, high weather resistance, water resistance, high temperature resistance, UV resistance, long-term use will not produce yellowing (yellowing) The problems of peeling and deterioration are completely different from the acrylic transparent glue in the market. The fish-eye mixed bead pretends to be optical glue (generally, the light transmittance of PMMA is still up to 95%, but its high temperature resistance, water resistance, and UV resistance are very poor. It will turn yellow in a short period of time, which will have a huge impact on the light transmittance, causing manufacturers to make claims against touch screen suppliers. As a result, both manufacturers and suppliers are defeated.)

At present, the world's truly capable of producing this OCA are:

Nitto in Japan: harder glue

3 M: Soft glue

Optical high transparency tape (OCA)

OCA optical adhesive thickness: 25um OCA optical adhesive, 50um OCA optical adhesive, 75um OCA optical adhesive, 100um OCA optical adhesive, 175um OCA optical adhesive

Features:

1.It has excellent heat resistance, moisture resistance, frost resistance, and good durability and sealing performance when it is laminated to various films such as CP and AC.

2.Have a high degree of transparency and smoothness;

3.Solved the mark left on the tape when the release film was peeled off.

4.Good die-cutting performance, improved processing rate and yield rate.

5.Highly clean processing environment and precise coating. Very little foreign matter gets in.

Application:

Used for electronic paper, transparent device bonding, projection screen assembly, aerospace or military optical device assembly, display assembly, lens assembly, resistive touch screen G+F+F, F+F, capacitive touch screen, panel, ICON and others Bonding of related electron optics.

Nine Tips for Optical Adhesive OCA Defoaming

1.The bonding process is in a class 10,000 clean room;

2.use a precision laminating machine;

3.Adjust the pressure, speed and angle of the laminating machine;

4.The cutting and punching process of the four optical adhesive explosion-proof films are all placed vertically;

5.With defoaming treatment with heating and pressure

6.Machine rolling. Pay attention to the flatness of PC (PMMA);

7.If the seven alignment is not correct, special tools can be made;

8.Adopt the method of heating while laminating:

9.or use Uninwell's liquid optical transparent glue 7070-5, UV curing type, light transmittance 99.99%, yield rate above 95%, which can solve the above problems