Classification of conductive adhesive processing materials and selection criteria for conductive adhesive

The materials used in conductive adhesive dispensing processing can be divided into:Conductive silver/copper adhesiveConductive silver/nickel adhesive, conductive nickel/carbon adhesive, etc., conductive adhesive dispensing processing has been applied to small and complex designed electronic communication equipment, such as communication base stations, mobile phones, etc GPS、 Automotive, electromechanical, instrumentation, security LED、 High end testing instruments and other electronic communication industries, as well as wireless communication industries, have become popular.

Selection criteria for conductive adhesive used in conductive adhesive dispensing processing

1. Shielding effectiveness: The different properties of products that require conductive adhesive dispensing processing need to take into account the technical parameters of the conductive adhesive.

2Conductive adhesiveHardness of conductive adhesive cured after dispensing processing: After assembly of structural components, the conductive adhesive needs to be compressed by 30% to 50% in the height direction to achieve good shielding effect. The hardness parameter of conductive adhesive is related to the pressure required during the assembly of structural components (the assembly density and assembly torque of screws).

3. The working temperature during the dispensing process of conductive adhesive: Each type of conductive adhesive has its own applicable temperature range and should be carefully selected.

4. Whether the structural components that require conductive adhesive dispensing processing are resistant to high temperatures: Conductive adhesives can be divided into two types based on curing temperature conditions: high-temperature curing and room temperature curing. For certain structural components that can withstand temperatures below 100 ℃ (such as plastic products, or components that are not heat-resistant), only room temperature curing conductive adhesive can be selected.

5. The tensile strength, tear strength, and elongation at break of the adhesive strip formed during the dispensing process of conductive adhesive reflect the ability of different conductive adhesives to resist damage under external forces. The lower the value, the poorer the ability to resist damage.

6. The fire rating of the adhesive strip formed during the dispensing process of conductive adhesive: The fire rating of conductive adhesive ranges from UL94HB to UL94-V0.

7. Cost considerations for conductive adhesive dispensing processing: Conductive adhesives with different metal fillers areConductive adhesive dispensing processingThere is a significant difference in time and cost. On the premise of meeting performance and process requirements, low-cost conductive adhesive dispensing processing can be chosen to reduce production costs and improve enterprise efficiency.