Control technology for the uniformity of silver powder dispersion during the preparation process of conductive silver adhesive for touch screens

Brief introduction

With the continuous development of touch screen technology, the performance requirements for conductive silver paste are also increasing.YB6009 touch screen conductive silver adhesive from Yanbo brandDue to its excellent conductivity, adhesion, and resistance stability, it is widely used for bonding materials such as ceramics, glass, and metals. However, the dispersion uniformity of silver powder in conductive silver paste directly determines its conductivity and overall quality. Therefore, controlling the dispersion uniformity of silver powder is the key to preparing high-quality conductive silver paste.

2、 The importance of uniform dispersion of silver powder

1. Conductivity: The silver powder is evenly dispersed, which can form more conductive pathways and improve the conductivityConductive silver adhesiveThe conductivity of the material.
2. Adhesion: Uniform dispersion of silver powder helps to enhance the adhesion between silver paste and substrate, improving the reliability of the product.
3. Overall quality: Uneven dispersion of silver powder can lead to inconsistent conductivity, affecting the overall quality and stability of the product.

3、 Method for controlling the uniformity of silver powder dispersion

1. Choose appropriate dispersing equipment

   Advanced Institute (Shenzhen) Technology Co., LtdEfficient dispersing equipment such as TRILOS three roll grinder was used in the preparation of YB6009 conductive silver adhesive for touch screens. The three roll grinder disperses silver powder more evenly in the resin matrix through the squeezing and shearing action of three rollers, improving the dispersion efficiency and effect.

2. Optimize dispersion process parameters

   The dispersion process parameters have a significant impact on the uniformity of silver powder dispersion. Advanced Institute (Shenzhen) Technology Co., Ltd. has optimized the dispersion process parameters, such as dispersion time, dispersion temperature, and dispersant dosage, through extensive experiments.

   Specifically, the preparation process is usually divided into two steps:

   • Preparation of matrix resin: Firstly, an electronic balance is used in the laboratory to weigh a certain amount of epoxy resin in a certain proportion and place it in a mortar. Other resin components (such as K77, ZE4MzeN, etc., which need to be ground and sieved through a 200 mesh sieve in advance) are added in proportion, and thoroughly ground and mixed with a grinding rod until a uniform mixture is formed to obtain the desired resin matrix.
   • Preparation of conductive silver adhesive: Place the ground resin matrix into a mixing device, add silver powder and other additives (such as rheology agents, solvents, etc.) in proportion, and stir the mixture. During the stirring process, it is necessary to control the stirring speed and time, as well as add components such as curing agents, accelerators, and coupling agents to ensure uniform mixing of each component. Meanwhile, ultrasonic dispersion technology can also be used to evenly disperse silver powder in the resin matrix by utilizing the energy of ultrasonic waves.

   Reasonable process parameters can ensure uniform dispersion of silver powder in the resin matrix, while avoiding silver powder agglomeration and settling.

3. Use appropriate dispersants

   Dispersant is one of the key factors in controlling the uniformity of silver powder dispersion. Advanced Institute (Shenzhen) Technology Co., Ltd. is preparingYB6009 touch screen conductive silver adhesive from Yanbo brandAt that time, efficient dispersants were selected, which can reduce the surface tension of silver powder and promote its dispersion and stability in the resin matrix.

4. Control the quality of raw materials

   The quality of raw materials also has a significant impact on the dispersion uniformity of silver powder. Advanced Institute (Shenzhen) Technology Co., Ltd. strictly controls the quality of raw materials during the preparation process, including the purity, particle size, and shape of silver powder. High quality raw materials can ensure that silver powder is more evenly dispersed in the resin matrix, improving the conductivity and overall quality of the product.

4、 Case analysis

Research Platinum Brand YB6009Touchscreen conductive silver adhesiveFor example, Advanced Institute (Shenzhen) Technology Co., Ltd. has successfully controlled the dispersion uniformity of silver powder by adopting efficient dispersion equipment, optimizing dispersion process parameters, using appropriate dispersants, and controlling raw material quality. After testing, the prepared conductive silver paste has good conductivity, strong adhesion, and stable resistance, fully meeting the needs of electronic products such as touch screens.

5、 Subsequent processing and quality control

After preparing the conductive silver paste, further processing is required, such as defoaming, to remove the bubbles generated during the mixing process and ensure the quality and stability of the product. At the same time, strict quality control is required, including conductivity testing, adhesion testing, resistance stability testing, etc., to ensure that the product meets relevant standards and customer requirements.

6、 Conclusion

Controlling the dispersion uniformity of silver powder is essential for preparing high-quality materialsTouchscreen conductive silver adhesiveThe key. Advanced Institute (Shenzhen) Technology Co., Ltd. has successfully improved the dispersion uniformity of silver powder by adopting efficient dispersion equipment, optimizing dispersion process parameters, using appropriate dispersants, and controlling raw material quality, and has prepared the high-performance YB6009 touch screen conductive silver adhesive of the Yanbo brand. These experiences and technologies have important guiding significance for improving the quality and performance of conductive silver paste for touch screens.