Electronic adhesive is a broad term, also called electronic and electrical adhesive. It has a wide range of categories and different properties. It is mainly used for bonding, sealing, potting, coating, structural bonding, co-coating and coating of electronic and electrical components. SMT patch. There are many types of electronic adhesives with different properties. In order to achieve the ideal bonding effect, you need to use the appropriate adhesive. So, what are the factors that need to be considered when purchasing electronic adhesives?
1. The adherend and its properties
There are many kinds of adherends, and the properties of each type of material are also different. The first thing you need to pay attention to before choosing glue is the type and nature of the adherend. For example, when bonding porous materials, you should choose an adhesive with a higher viscosity. When bonding elastic or tough materials, you should choose an adhesive with good elasticity and certain toughness.
2. Adhesive properties
Adhesives are the basis for bonding. Different electronic adhesives have different properties and uses due to different formulas. Only by understanding the performance of adhesives can you easily choose the appropriate electronic adhesive.
3. Usage environment
No matter what product is bonded, it needs to be used under certain conditions, and its use environment includes temperature, humidity, chemical media, etc.
Temperature ：Different electronic adhesives have different temperature resistance. For adherends that need to work at high temperatures, electronic adhesives with high temperature resistance, heat resistance, and aging resistance should be used; for adherends that need to work at low temperatures, cold-resistant and low-temperature-resistant electronic adhesives should be used; For adherends that may need to work at high temperatures or at low temperatures, electronic adhesives that are resistant to high and low temperature impact should be used.
Humidity: Moisture and moisture will affect the stability of the bonding surface. If the humidity in the use environment is too high, the moisture in the air will penetrate into the adhesive layer, thereby reducing the bonding strength. For adherends that need to work in humid and complex environments, electronic adhesives with good moisture resistance, heat resistance, and aging resistance need to be used.
Chemical medium: Common chemical media mainly include acids, alkalis, salts, solvents, etc. Because there is no adhesive that is completely resistant to media, and different adhesives have different media resistance due to different curing conditions, so the electronic adhesive should be purchased according to the adherend. Contact medium to choose.
4. Bonding process
Different adhesives require different bonding processes. Some cure quickly, some cure very slowly, some cure at room temperature, some cure by heating, some cure by UV, etc. For example, in automated production with fast process requirements, electronic adhesives that can be cured quickly need to be used; for some large equipment that is inconvenient to heat, room temperature curing electronic adhesives need to be used; for some products that are opaque and cannot be fully illuminated by UV light, it is necessary to use UV+moisture dual-cure adhesive.
In production, electronic adhesive is an important auxiliary material for electronic products. It is widely used. You need to be careful when purchasing, such as the use environment of the adherend and the performance of the adhesive mentioned in this article. Consider multiple aspects. The more considerations you make when purchasing, the less worries you will have in the future.
