Most common problems arising due to the application and manipulation of hot melt adhesives

Problemas manipulación adhesivos hotmelt

Have you ever encountered any problems when applying and handling hot melt adhesives? If so, don’t worry. In this post, we tell you how to detect and solve any incident that may arise.

There is no doubt that hot melt adhesives have multiple benefits. Their use is widespread in countless industries and they are already popular worldwide for their strength, durability and versatility.

However, the application and handling of these hot melt adhesives must be carried out successfully if their recognized effectiveness is to be fulfilled.

Throughout our long business history, we have devoted a lot of resources and time to carry out exhaustive research in order to improve our formulations and adapt them to new market trends, but also to solve the problems our customers face when applying the glue or handling their adhesives.

In this sense, we have carried out an analysis of common problems arising from the application and handling of hot melt adhesives so that the customer is not only able to detect any anomaly, but also to act accordingly.

Our commitment to the customer is such that we provide a comprehensive service that includes pre-purchase and post-purchase advice.

6 problems arising from the application and manipulation of hot melt adhesives

Here are 6 of the most common problems that can occur when applying or handling hot melt adhesive:

  • Thread formation.
  • Carbonization, gelling or vaporization of the adhesive in the tank.
  • Opening of box flaps.
  • Poor penetration or adhesive failure.
  • Air bubbles.
  • Dripping at the nozzle.

If you recognize any of them, keep reading this post because we are going to tell you what you can do at each moment.

Thread formation

Thread formation can be identified when, at the end of the application, some of the hot-melt adhesive remains in the nozzle and forms threads.

Carbonization, gelling or vaporization of the adhesive in the tank

Carbonization, gelling or smoking of hot melt adhesive can be noticed by the blackened color, thick texture and smoke coming out of the deposit.

The adhesive yellows and/or darkens and loses its cohesive strength, which makes it easier to peel off.

Opening of box flaps

Box flaps have a tendency to open for a variety of reasons. When this happens, we notice traces of adhesive on one or both sides of the flap or that the carton opens shortly after coming out of the machine.

Poor penetration or adhesive failure

Poor penetration is identified by little or no adhesive application on the substrate. It is quickly detected as soon as we observe that there is adhesive on only one of the two parts of the flap and these are easy to remove. As a result, the adhesive is likely to peel off only one of the substrates.

Air bubbles

Air bubbles can appear in both the applicator and the substrate, reducing application uniformity and adhesive performance.

Dripping at the nozzle

At the end of each application the adhesive drips from the nozzle tip. This usually occurs when the applicator is hot, even though it is kept out of operation.

Productos Colcar is a company highly committed to excellence, innovation and the implementation of the latest technologies to achieve formulations that offer maximum performance in various areas such as the mattress sector, food packaging and perfumery sector, labeling, edge banding, paper bags, e-commerce, etc.

If you need more information, please contact us at

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