Pressure Sensitive Hot Melt Adhesive For Bag

     What are the selection criteria for Hot Melt Adhesive for express bags?

1. bag sealing Binding Agent, must be stable performance, with good low temperature initial viscosity, strong initial stripping strength and good high temperature resistance. Express bag sealing adhesive has high requirements on high temperature and low temperature resistance, because the application of Hot Melt adhesive in express bag sealing is also divided into summer glue and winter glue. Hot melt adhesives will have different effects at higher temperatures and lower temperatures. The most common effect is the viscosity of the glue. Different hot melt adhesives should be used according to different climates. The summer temperature is relatively high, if the use of general glue, it will be easy to have glue and oil, or it will be easy to deglue in the case of low temperature in winter.

2. in the selection of hot melt adhesive should pay attention to the color of the glue, in general, if there is no special requirements, yellow hot melt adhesive is better than white adhesive. Secondly, although the hot melt adhesive is not so strict on the surface treatment, it is necessary to do appropriate treatment for dust and oil, so that the hot melt adhesive can play the best role.

3. express bag is a kind of confidential transportation plastic bag, their function is not only packaging products, but also to protect the confidentiality of the product, is only a plastic bag that can be used once, if the product is folded halfway, the plastic bag will be destroyed, which is the sealing hot melt adhesive played a role. Therefore, broken wood is an important property.

What is the breaking effect? After the completion of an express bag, the sealing place of the glue was not broken by the hot glue, but it still caused moderate damage to the surface of the plastic material. The plastic used to make express bags is relatively loose, and such a loose molecular structure also brings a lot of space with the combination of molecules of hot melt adhesive. During the gluing process of the bag, after the plastic surface is heated, its molecules are vigorously moving, and when the glue is cooled, the plastic molecular chain and the hot melt adhesive molecular chain are interlaced together to form a new and stable structure, which is even more stable than the original plastic molecular structure. Secondly, the express bag is used on the pressure sensitive hot melt adhesive, even at room temperature, the surface also has a strong initial viscosity. When the package is sealed, a little pressure is applied to the mouth of the bag, and the mouth of the bag is sealed so that the bag is sealed, and the contents of the bag are well protected from contamination. When we tear the package from the mouth of the bag, we find that the plastic next to the adhesive is generally torn, and the seal can not be pulled open how hard, really stick very firmly! This is the effect of breaking the glue.

Hot melt adhesive is very sticky and destructive, that is to say, if the opening of the express bag is glued with this adhesive and then opened, the plastic bag must be broken and will not be used again, so as to protect the privacy of your product.

4. How much Hot Melt Glue is suitable for the sealing of the express bag? The amount of coating also affects the production cost to a certain extent, so the appropriate adhesive thickness becomes very important.

In order to save costs, some manufacturers will paint the glue line very thin, its thickness is less than 0.1 mm, so the consequences of coating are difficult to predict, may be due to insufficient bonding force, the phenomenon of bag mouth loosening, causing incalculable loss to the user; The glue is too thick, and it will increase the production cost. Therefore, according to a large amount of experience, 0.2-0.3mm thickness, or 100-200GSM glue amount is more appropriate, which can ensure the sealing quality of the bag mouth, and the amount of glue is not too large, so the production cost is not too high.

Hot Melt Adhesive For Express Bag