What Is The Structure of OCA Optical Adhesive?

Recently, many netizens have been asking about the structure of OCA optical adhesive? What is the function of OCA optical adhesive? This time, Ruihua Technology will give you a detailed explanation. Simply put, OCA optical adhesive is made of optical acrylic adhesive without a substrate, and then coated with a release film on the upper and lower layers. This is the structure of OCA optical adhesive.

We all know that OCA optical adhesive requires very high cleanliness, why? This involves the role of OCA optical adhesive. OCA optical adhesive is currently the best adhesive for touch screens, mainly used for bonding materials on touch screens, playing a capacitive touch sensing effect. However, OCA optical adhesive, as a high transparency double-sided adhesive tape without substrate, is very prone to deformation after compression.

Below, we will provide a detailed introduction to the structure of OCA optical adhesive. There are generally four types of structures for die cut OCA optical adhesives:

1. Protective film+heavy release+OCA adhesive+light release, as shown in the following figure. This process requires film replacement, which is difficult to process and costly. It is generally a product required by large enterprises.

2. Heavy release+OCA adhesive+light release, as shown in the following figure. This process also requires film replacement, with only a few layers of protective film, which is currently a commonly used method.

3. Heavy release+OCA adhesive+light release, as shown in the following figure. This process does not require changing the film and is the most commonly used method in general miscellaneous machines. This method is simple to process, easy to control, has a low defect rate, and is much cheaper in price.

4. Heavy release+OCA adhesive+light release, all three layers are of the same size, as shown in the following figure. As before, there is no need to change the film. This method is used by miscellaneous machines, which is simple to process, easy to control, has a low defect rate, and is cheap. The only downside is that there will be compression marks on the edges, but miscellaneous brands have much looser control over these, and generally minor ones can be adopted.

When assembling a mobile phone, the OCA 0.5mm edge is usually covered, which means that if there are slight indentations on the edge, as long as it is controlled within 0.5mm, most customers can use it.

Usually, when discussing a case, we first need to understand the client's usage methods. The above is a detailed explanation of the structure of OCA optical adhesive, hoping to be helpful to you.