Solutions to problems encountered in packaging hot melt adhesives

Hot melt adhesives are widely used in the packaging industry, including packaging cartons and cartons used in our daily necessities, gifts, toys, biscuits, instant noodles, beer, etc., as well as some plastic bottle caps for cleaning supplies and beverage straw bags. For applications such as lamination, in addition to paper, these packaging materials will also involve some plastic films, UV and other materials, and overflowing adhesive packaging hot melt adhesives will make corresponding solutions according to these different applications. In addition to considering the selection of suitable models and packaging materials, other external factors are also very important, such as equipment, human operation, weather, etc., here we summarize some common problems in the packaging industry and their solutions Program.

 

1. What is the reason why the packaging is easy to be degummed during use?

1. The opening time of the processing equipment is too short, and the heating temperature is not enough to meet the requirements of the ideal adhesion, resulting in poor permeability and adhesion strength of the glue, which can be solved by appropriately increasing the temperature and prolonging the opening time;

2. The strength of the lamination after applying the glue is not enough so that the glue cannot penetrate completely, which affects the effect of the bonding. It is necessary to increase the pressure appropriately to solve it.

3. The lamination time does not reach the curing time required by the hot melt adhesive. Although the production efficiency is high, it reduces the penetration force and bonding performance of the adhesive, and needs to extend the lamination time to solve the problem.

4. Excessive humidity of the packaging material will affect the adhesiveness of the packaging hot melt adhesive. Ensure that the storage environment is dry and dry during normal storage.

5. The curing speed of the glue is too fast. You can increase the glue temperature, increase the glue amount or increase the packaging temperature to prolong the curing time. On the contrary, lower the glue temperature or reduce the glue amount.

6. When degumming, it is found that there are hot melt adhesives on both sides of the material to be adhered, which shows that the cohesion of the hot melt adhesive used is not enough and affects the transfer resistance, peel strength or shear chord. You can try to use other types of glue .