Suzhou Oushida Hot Melt Machinery Equipment Co., Ltd.

Hot melt adhesive drawing? This is the reason!

Company Profile

Suzhou Oushida Hot Melt Adhesive Machinery Equipment Co., Ltd. is a high-tech enterprise specializing in the research and development, production, sales and technical consulting of hot melt adhesive intelligent spraying equipment.

When using hot melt adhesive, some customers will find that hot melt adhesive will have drawing phenomenon. Hot melt adhesive drawing will not only affect the construction efficiency, but also affect the appearance of the product, and may also affect the bonding effect.

So how to solve the problem of hot melt adhesive drawing?

First, we need to understand the reasons why hot melt adhesive draws and solve the problem according to different reasons. The case is as follows:

1. The temperature of the hot melt glue machine is set too low

The low temperature of the hot melt glue machine will make the hot melt glue thicker, resulting in the phenomenon of drawing. Therefore, when encountering this situation, you can consult the hot melt glue manufacturer about the construction temperature of the corresponding glue and increase the temperature setting appropriately. In addition, due to the low temperature in winter, the problem of glue drawing may also occur. At this time, you need to understand that the heating temperature of the hot melt glue machine in winter needs to be increased by about 10℃-20℃ compared with the heating temperature in summer. If you are using the hot melt glue machine for the first time, you can contact the hot melt glue machine manufacturer at any time for detailed operation.

2. The cohesive force of the hot melt adhesive is too large

The cohesive force of the hot melt adhesive itself is too large. During the construction process, the probability that the adhesive can resist deformation is greater, and it is less likely to be broken, resulting in obvious wire drawing. The smaller the cohesive force, the easier it is to be broken during construction, and it is not easy to produce flying wires. If the product adhesion is sufficient, you can choose a hot melt adhesive with a smaller cohesive force, which is helpful to reduce the occurrence of wire drawing, or increase the heating temperature of the hot melt adhesive machine and increase the fluidity of the glue to reduce wire drawing.

3. Rheology of molten glue

Under high temperature conditions, glue is fluid, which is mainly related to the selection and proportion of glue. The shorter the curing time of glue, the easier it is for glue to stop flowing and the less likely it is to produce wire drawing. Under conditions where the process permits, choosing glue with a short curing time is more conducive to reducing wire drawing.

4. Cohesive failure of hot melt adhesive

Under the action of high temperature, the adhesive will gradually experience cohesive failure, and the macromolecular structure will gradually decompose into small molecules. At this time, the fluidity of the adhesive will increase and the curing time will be prolonged, which will cause the hot melt adhesive to be pulled longer and wire drawing to occur. If the performance of the adhesive is confirmed to be damaged, the glue cylinder of the hot melt adhesive machine needs to be cleaned and replaced with new hot melt adhesive to solve this problem.

Analyze specific problems specifically. As the demand for hot melt adhesive products is increasing rapidly, the problems that arise are also different. The above is a brief introduction to some analysis of hot melt adhesive drawing problems. If you want to know more about hot melt adhesive spraying equipment, you can continue to pay attention to the content of our official account or follow the official Douyin account of Oushida!

Overview of Oushida hot melt adhesive intelligent spraying equipment