When we choose staple adhesives of poor quality, it brings about a lot of operational problems in different industries. In places where there are many documents, like offices or libraries, we often see paper jams. This is because the staples come loose due to the weak adhesive. In factories, the situation is even worse. Sometimes, products have to be recalled because the packaging seals made with bad adhesive break. According to reports from industrial maintenance, the money spent on fixing these problems and the waste of materials are much more than the money we saved by buying cheap adhesives. In fact, they can be 300 - 400% more.
The quality of subpar adhesives becomes very obvious when the temperature changes. Many of these adhesives can't pass the bond tests if the temperature is higher than 40°C or lower than 5°C. Also, if the environment is humid, adhesives that are sensitive to humidity will get worse. This can cause problems in food packaging and in things related to the sea. In areas where the staples need to hold a lot of weight, like in construction or making car seats, these problems can be dangerous.
For industrial adhesives to work well, their viscosity should be between 2,500 - 4,000 cP. This helps the staple to go through the material and stick well. We should look for products that have the ASTM D903 certification. In independent lab tests, these products should have a peel strength of more than 4.5 N/cm². Also, the adhesive should be able to work well in different temperatures, from -20°C to 60°C.
The adhesive should dry quickly, within 90 seconds. This way, the production process won't be stopped. New types of polymers in the adhesive can make it resist moisture after 24 hours, which is very important for things used outside. We also need to make sure the adhesive is okay to use with different kinds of staple metals, like galvanized steel and aluminum. This can stop the metals from reacting and becoming weaker over time.
According to material science studies, getting the surface ready before using the adhesive can make the bond much stronger, by 62% in fact. We should follow the ISO 8501-1 cleanliness standards. This means using a solvent to clean off any grease and gently rubbing the surface a little to help the adhesive stick better. The temperature when we use the adhesive should be between 18 - 25°C. This stops the adhesive from drying too early or changing its thickness when we put it on.
Choosing the right nozzle for the adhesive is important. It should let out 0.8 - 1.2 mg of adhesive for each staple. This makes sure there is no mess and the staple is completely covered. After putting the adhesive on, we need to let it cure. Applying controlled pressure for 15 - 30 minutes can make the bond as strong as possible. Also, we need to regularly check and adjust the equipment to make sure the adhesive is put on the same way every time, especially when we are doing a lot of production.
We should have a plan to take care of the adhesive. Every three months, we should check the viscosity of the adhesive using a rotational rheometer. We also need to use systems to watch the humidity and temperature. These can affect how well the adhesive stays stuck. Instead of just looking at the adhesive to see if we need more, we should use data about how much we use. This can stop us from running out of adhesive during important production times.
Storing the adhesive properly can make it last 40% longer. We should keep it in a place where the climate is controlled and use packaging that protects it from UV light. We should also manage our stock using the FIFO method. This means using the oldest adhesive first, and we should use it within 12 - 18 months when it is still chemically stable. Training our employees can also help. By teaching them how to handle the adhesive correctly and how to use the dispensing equipment well, we can reduce waste by 28%.