Views: 98 Author: Best Electronic Adhesives Glue Manufacturer Publish Time: 2022-07-19 Origin: https://www.deepmaterialcn.com/
Using Liquid Optically Clear Epoxy Adhesives Glue For OLED And Mini Led Touch Screen Display
OCA or optically clear adhesives have been used for many years now in the bonding of OLED and LCD displays for different consumer electronics. These adhesives offer good electrical, mechanical, and optical performance-related benefits. The requirements of an adhesive to bond circular polarizers, touch sensors, and cover windows in plastic OLED display to foldable, flexible OLED or bent cover glass. The adhesive needs to be strong enough to resist spoiling the plastic devices. It is important to manage the neutral plane for the foldable OLED displays, especially during the folding, to reduce the strain on the device layers. This makes sure that the optically clear adhesive does not cause layers to deform, and it does not deform either when the folding process is in progress,
Many challenges are brought about by folding. This means that the OCA prevents corrosion of the materials like graphene, carbon nanotube, silver nanowire, and metal mesh. It can affect the touch sensors that don’t use any conventional passivation of layers.
Popularity of OCAs
Optically clear adhesives have been used in automotive, industrial, and consumer electronics for over a decade. The adhesives' use has increased because of their use in consumer devices. There has been a transition that cannot be ignored.
One of the main reasons OCAs are popular is their electrical, optical, and mechanical performance of the devices and the display module. Initially, the OCs were applied in OLED-based devices similar the LCD devices. Plastic OLED devices became popular in the market, and new form factors like curved OLEDs were introduced.
When you are choosing optically clear adhesives. There are different mechanical considerations that you will have to make. You need to determine how strong it is and whether or not in the sticks. The latter refers to the adhesive strength. Adhesive strength is defied by how adhesion works. Van der Waals interactions, mechanical and covalent ionic interlocking acid-base, and hydrogen bonding makes this possible.
Pressure-sensitive adhesives are film-based, and LOCAS is dispensed and cured liquids. After it sticks, the material's cohesive strengths determine the following mechanical bond. At this point, the conventional adhesives remain functional until the bond fails. In the case of OCAs, they remain functional until capitulation occurs at a much lower strength than bond failure. It is possible to design the OCAs’ cohesive strength to resist bubble formation and cavitation after it is warranted.
It is important to test the optically clear adhesives for durability and reliability at high humidity and temperatures. There must be enough adhesive strength so as to maintain the best performance regardless of the prevailing conditions. The modes that could lead to failure include bulk plasticization and moisture ingress. You should pick an adhesive that has enough strength based on the device or module. The adhesive should also be durable.
It also helps to understand the refractive index of the adhesives, which should be compared against the material you intend to use. The index should be matched appropriately for the best results.
For more about using liquid optically clear epoxy adhesives glue for oled and mini led touch screen display,you can pay a visit to DeepMaterial at https://www.deepmaterialcn.com/High-Refractive-Index-Optical-Adhesive-ic287009.html for more info.