Comprehensive Analysis of OCA Optical Bonding Materials for Touchscreens

Comprehensive Analysis of OCA Optical Bonding Materials for touchscreen

With the rapid development of smart devices, touchscreens have become the core interface for human-computer interaction. To enhance display quality and touch experience, material selection in optical bonding processes is crucial. Optical adhesives must not only be colorless and transparent with high light transmittance (≥98%) and strong adhesion, but also feature low curing shrinkage, excellent durability, and adaptability to various environments. Common optical adhesive materials include silicone, acrylic resin, unsaturated polyester, polyurethane, epoxy resin, etc., with OCA and OCR/LOCA being the two most widely used types.

1. What is OCA?

OCA (Optically Clear Adhesive) is a double-sided adhesive made from optically clear acrylic adhesive, layered with release films on both sides.

Key Advantages of OCA:

• High Purity: Minimal impurities to ensure clear visuals

• High Light Transmittance & Low Haze: Maintains display brightness and color accuracy

• Uniform Thickness: Smooth adhesive layer suitable for precise bonding

• Strong Adhesion: Durable and long-lasting bonding

• Wide Material Compatibility: Supports soft-to-soft, soft-to-hard, and hard-to-hard bonding

Application Scenarios:
OCA is better suited for small, flat touchscreens such as smartphones and tablets.

2. What is OCR/LOCA?

OCR (Optical Clear Resin), also known as liquid optical adhesive or LOCA, is a liquid optical adhesive. Once cured, it becomes colorless and transparent, with light transmittance exceeding 98%. It also offers minimal curing shrinkage, resistance to yellowing, and strong environmental durability.

Key Advantages of OCR/LOCA:

• Versatile: One adhesive can be applied to multiple products

• Excellent Flowability: Effectively fills gaps between ink and coatings, unaffected by thickness differences

• Large Size Compatibility: Suitable for large and curved surfaces

• Complex Structure Adaptability: Supports both flat and non-flat surface bonding

• High Yield & Reworkable: Improves production efficiency and reduces waste

• Stable Chemical Bonding: Resistant to temperature effects, ensuring strong adhesion

Application Scenarios:
OCR is more suitable for large, curved, or specialty-environment touchscreens and display modules, such as automotive displays, medical equipment, and outdoor terminals.

3. DINGTouch High-Sensitivity Silicone OCR Solution

As a professional supplier in the touch industry, DINGTouch is committed to providing high-performance optical bonding material solutions. Our high-sensitivity silicone OCR products are specifically designed for touchscreen bonding applications.

Technical Advantages:

• 400% Contrast Enhancement in Sunlight: Effectively eliminates optical loss caused by air layers

• Wide Temperature Range (-50℃ ~ 200℃): Ensures long-term reliability under extreme conditions

• High Reliability: Enhanced impact and bending resistance for improved stability

• Slim Design: Available in multiple thicknesses, supporting ultra-thin display solutions

• Excellent Environmental Adaptability: Combined with A/R anti-reflection glass to improve outdoor visibility and touch sensitivity

Application Fields:

• Consumer Electronics: Smartphones, tablets, wearable devices

• Automotive Displays: Central control screens, dashboards, rear-seat entertainment screens

• Industrial & Medical: Control panels, medical display devices

• Smart Terminals: Self-service kiosks, digital signage, smart home control panels

4. Conclusion

OCA and OCR/LOCA are two essential materials in optical bonding processes.

• OCA: Mature process, ideal for small, flat bonding

• OCR/LOCA: Flexible, suitable for large, curved, or complex environments

DINGTouch high-sensitivity silicone OCR not only enhances touchscreen visibility and touch performance but also leads the industry in reliability and environmental adaptability, providing customers with high-performance optical bonding solutions.

Ready to Build Your Outdoor Display Solution?

Get in touch with us at sales@szdingtouch.com. Our expert engineers will help you design a cost-effective, tailored solution to meet your project’s exact specifications.

DINGTouch:Committed to continuous innovation and improvement of product quality to meet customers' high requirements and expectations.

DINGTouch is a manufacturer that provides high quality touch screen panels. Focus on the design, manufacturing and sales of touch screen panels, and are committed to providing customized solutions that satisfy customers.

DINGTouch: In the process of customizing touch screen panels, we focus on close cooperation and communication with customers. Understanding customers' needs and providing customized solutions will meet customers' individual needs. The company's products are favored by customers for their high quality and reliability, and provide them with the best touchscreen panel solutions.

At DINGTOUCH, we are the world's leading touchscreen manufacturer, helping businesses around the world take advantage of this exciting technology. For more information, please visit the home page now.
Find the DINGTouch technical team to achieve the success of your company's new project.

How to choose touch screen customization?

DINGTouch is a company specializing in the R&D and production of touch screen technology, headquartered in Shenzhen, China. As a professional touch screen supplier, DINGTouch is committed to providing high-quality, stable and reliable touch screen products to meet the diverse needs of customers. We continue to carry out technological innovation and product optimization to ensure that its touch screen products have good sensitivity, accuracy and durability.

In addition to the products themselves, we also focus on cooperation and communication with customers, and are committed to providing customized solutions and excellent after-sales services. Through continuous efforts to improve product quality and customer satisfaction, we have established a good reputation in the touchscreen industry and won widespread market recognition.

What DINGTOUCH can do:

• PCAP  maximum size 65”

• Multi-touch (Touch screen can be customized to your needs.)

• Optical bonding service/air bonding

• LCD interface: HDMI/RGB/MIPI/LVDS/EDP, etc.

• PCAP interface: IIC/USB interface

• CTP can customize the cover glass surface treatment process AG (anti-glare), AR (anti-reflection), AF (anti-fingerprint), waterproof, and glove touch

• Supports 0.55 mm-12 mm coverslip touch.

• Support operating temperature: -40℃-90℃.

Dingtouch Industrial Capacitive Touch Screen Manufacturer

In conclusion, Dingtouch as a professional touch screen manufacturer with more than 10 years touch screen experience.We have many capacitive touch screen. Such as5  inch touch screen,7 inch touch screen,10.1inch touch screen,15 inch touch screen,15.6 inch touch screen,17 inch touch screen,18.5 inch touch screen,19 inch touch screen,21.5 inch touch screen,32 inch touch screen, However, we also welcome to customize your own touch screen . Contact our team today to learn what capacitive touch screen are best for our retail business needs.

Contact us NOW! sales@szdingtouch.com

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