In the packaging material, the hot melt adhesive for packaging has always occupied a very important part. Hot melt adhesive is a new type of binder developed to meet the requirements of today's packaging industry for harmless, energy-saving, resource-saving and no environmental pollution. Hot melt adhesives are characterized by 100% solids and do not contain water or other solvents, so there is no environmental pollution and residual solvent toxicity. In addition, it has a high degree of adhesion, and different compositions of hot melt adhesives can be selected according to different occasions.
Hot melt adhesives are produced quickly and can bond substrates at high speeds; Suitable for bonding of various substrates; The bonding equipment is small, low cost and easy to operate. Hot melt adhesive is a use of hot melt materials, in addition to being used as glue, hot melt materials can also be used as gap fillers, sealants, water barriers, etc. Since the hot melt adhesive is bonded in a molten state, it is required that the heat resistance of the bonded substrate be good to avoid thermal decomposition during bonding operations. For each component of the hot melt adhesive, good heat resistance is required.
1. The bonding of hot melt adhesive is to melt the hot melt adhesive through the hot melt adhesive machine. The melted glue becomes a liquid and is then sent to the surface of the object to be glued through the hot melt glue gun and the hot melt adhesive tube of the hot melt adhesive machine. After the hot melt adhesive has cooled, the bonding is complete. In order to give full play to the advantages of hot melt adhesive in bonding, it is necessary to match the corresponding quality and reliable hot melt adhesive with high-quality hot melt adhesive.
2. When the hot melt adhesive is constructed, its curing speed is relatively fast, and its adhesion and flexibility are relatively good, so it does not need to spend most of the time to carry out the bonding treatment.
3. The life of hot melt adhesive is relatively long, and it has water and moisture resistance, and its price is relatively cheap.
4. The gloss of the hot melt adhesive is relatively good, and it is more convenient when storing, and there is not much requirement for the storage environment.
In fact, the application of hot melt adhesives in the packaging industry has always been the best existence in hot melt adhesive applications. Development to the present, the common hot melt adhesive sealing process application in the packaging industry, in addition to the common manual hot melt glue gun glue sealing boxing, has gradually emerged high-speed hot melt adhesive automatic sealing machine and hot melt adhesive particles, hot melt adhesive blocks; The advantage is that the glue speed, the amount of glue can be precisely controlled, the speed is faster and more efficient; Suitable for large and small cartons, small cartons high-speed sealing, improve production efficiency.
