Selection of hot melt adhesive for outer packaging

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Selection of hot melt adhesive for carton outer packaging

(1) color

due to the different colors of the bonded objects, the color requirements of hot melt adhesive should be different. If the color of the bonded object itself is not special to the printing and issuing of the special plan for the development of new material industry in Shandong Province (year), it is difficult to re shape and process. It is recommended to use yellow hot melt adhesive. Generally speaking, yellow hot melt adhesive is better than white adhesive

(2) surface treatment of the bonded object

the hot melt adhesive is not as strict as other adhesives in the surface treatment of the bonded object, but the dust and oil on the surface of the bonded object should also be properly treated in order to make the hot melt adhesive play a better role in bonding

(3) operation time

fast operation is a major feature of hot melt adhesive. The operation time of hot melt adhesive is generally about 15 seconds. With the wide application of modern production lines, the operation time of hot melt adhesive is required to be shorter and shorter

(4) temperature resistance

hot melt adhesive is sensitive to temperature. When the temperature reaches a certain level, the hot melt adhesive begins to soften; Below a certain temperature, the hot melt adhesive will become brittle, so the selection of hot melt adhesive must fully consider the change of ambient temperature

(5) viscosity

the viscosity of hot melt adhesive is divided into early viscosity and late viscosity. Only when the early viscosity is consistent with the late viscosity can the hot melt adhesive and the bonded object remain stable. In the production process of hot melt adhesive, it should be guaranteed to have oxygen resistance, halogen resistance, acid alkali resistance and plasticization

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