One of the reasons for the blistering of hot melt adhesive films: the inability of the air to escape causes blistering

One of the reasons for the foaming when the hot-melt adhesive film and the hot-melt adhesive mesh film are laminated is that the air cannot be discharged, which is generally common when laminating airtight products like films. Because airtight products like films cannot discharge the accumulated air from the surface layer when laminating like cloth products, so when laminating, if the whole surface is directly pressed, the air in the middle is easy to cause backlog Yes, so there is a problem of foaming after lamination.

Solutions for Bubbling due to Air Backlog

The solution is to use a roller-type laminating machine or an iron to slowly heat-press from one side of the material, so that the air in the middle can be continuously discharged through the surrounding, without causing a backlog of air, and avoiding the Foaming problems caused by the inability of the air to escape.

One of the causes of blistering of hot melt adhesive films: secondary heating

The production process requires secondary heating of the product, so it is necessary to pay attention to the problem of foaming of the product during secondary heating, which is more common in thermal transfer processing. Generally, the product will not foam during the first lamination, but due to the secondary heating, the hot melt adhesive film and the hot melt adhesive mesh film will be melted again, and the adhesive mesh film will have poor viscosity when it is melted at high temperature. At this time, if a certain pressure is not given, it will cause the foaming problem of the product.

Solution for bubbling due to secondary heating

The solution is: try to avoid the secondary heating of the product, if it is unavoidable, pay attention to applying a certain pressure to the material during the secondary heating, so that the hot melt adhesive film and the hot melt adhesive mesh film can still stick to the upper and lower sides during the secondary melting. layer material, so that when the product is cooled and the hot melt adhesive film is cured, it can still maintain a good bond fastness of the product, and there will be no gas.