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Whether using hot melt adhesive for packaging, automotive, printing materials, or any other adhesive application, details are important. The good case is that inefficient use of adhesive can lead to waste – the bad case is that it can cause system problems, thereby increasing costly downtime.
One of the common problems encountered with hot melt adhesives is adhesive bonding. We have compiled the following guide to help you understand what wire drawing is, how it occurs, and how to solve it.
What isHot melt adhesive wire drawing?
When some adhesive material is left on the nozzle and pulled into a line, hot melt adhesive wire drawing occurs, whether it is automatically pulled off the production line or manually pulled out when the pistol is pulled away from the application surface. The adhesive thread left behind is sometimes referred to as “angel hair”.
Hot melt adhesive wire drawing can affect any hot melt adhesive application, but it may cause problems for certain special situations:
In food packaging applications, hot melt adhesive wire drawing can cause adhesive fragments to fall off and contaminate food.
In pharmaceutical applications, hot melt adhesive wire drawing may break inside the drug packaging, which may result in accidental ingestion.
In automotive applications, the application of precision adhesives on visible components is an important part of ensuring the cleanliness of the car’s appearance.
In the application of box and cardboard box sealing, hot melt adhesive may appear on the product or on the box containing the product.
What causesPackaging hot melt adhesive wire drawingHow can I solve it??
There are various reasons that can cause hot melt adhesive wire drawing, including:
Application temperature:When the adhesive temperature is not high enough, the adhesive will become too viscous, leading to wire drawing..
Solution:Check your hot melt material data sheet （MDS） To find the correct temperature setting.
Delayed shutdown:In older glue gun switches, the shutdown speed is slower..
Solution:Sunlife hot melt adhesive technical experts are happy to help you determine whether the use of adhesive equipment is a factor causing the hot melt adhesive wire drawing problem..
Distance from surface:If the distance between the gluing equipment and the surface is too large, it will cause the adhesive to cool down after application, resulting in wire drawing..
Solution:Try to reduce the distance between the gluing equipment and the application surface..
Other potential causes:Over the years, we have seen various components and issues that cause packaging hot melt adhesive wire drawing, including debris accumulation in hoses and other components, solenoid problems that hinder the normal circulation of hot melt guns, and so on.
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