Factors Affecting the Bonding Strength of Adhesives in Dispensing Applications

Have you done your Dispensing today? As we all know, in the manufacturing process of electronic products, dispensing is a critically important step. It directly impacts product quality and user experience. If the adhesive isn't properly applied, the product is compromised.

Therefore, the bonding strength of the adhesive is particularly crucial. Below are the factors influencing the adhesive bonding strength in dispensing equipment:

1) Structure, properties, and formulation of the main adhesive material;  

2) Nature and surface treatment of the adhered objects;  

3) Coating, bonding, and curing processes;  

4) Method, geometric dimensions, and processing quality of the adhesive joint;  

5) Testing environment conditions such as temperature and pressure;  

6) Speed, direction, and method of external force loading.  

Physicochemical Performance Testing of Adhesives for Dispensing Equipment

1) Uniformity, state, color, and presence of impurities in the adhesive liquid (appearance test);  

2) Determination of liquid adhesive density using a density bottle (density test);  

3) Viscosity measurement using a Ford-4 viscosity cup (seconds) and a rotational viscometer (Pa·s) (viscosity test);  

4) Key data for studying the curing conditions of adhesives (curing speed test).