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The reason for the carbonization of the hot melt adhesive of the hot melt adhesive compound machine

After using the hot melt gluer for a long time, you will see a layer of black material around the glue barrel. These are some carbides. Many people will not know how these carbides are formed and how we should be good. to avoid excessive carbide production. In fact, it can be mainly analyzed from the following aspects. The main reasons for carbonization or even gelation of hot melt adhesives are as follows: the temperature of the plastic box is too high, the temperature control is faulty, the actual temperature is lower than the displayed temperature, or the temperature is much higher to control, and the hot melt glues The glue layer on the surface of the glue box is carbonized, and the thermal stability of the glue itself is not good. The time of hot melt glue in the glue box is long.

There are two different types of hot melt adhesives in the glue box of the hot melt adhesive compound machine. For the above reasons, the following aspects need to be done in the daily glue application process: The glue temperature is set according to the specified technical parameter values. When there are abnormal phenomena such as carbonization, check the difference between the temperature control and the actual temperature, and close the lid of the plastic box at any time to avoid the contact between the high-temperature hot melt adhesive on the surface and the fresh air, which will accelerate oxidation. The amount should not be too much. It is enough to add more than one third to half of it for maintenance. After cleaning the hot melt adhesive that has been repeatedly heated for a long time, replace it with a new one. Do not use two different types of hot melt adhesive.

The bonding interlining of the hot melt adhesive compound machine is made by uniformly spreading hot melt adhesive on the surface of the fabric. When in use, the adhesive interlining is cut into the required shape and size, and the side coated with hot melt adhesive is thermally bonded to the back of other fabric materials (fabrics). It is lined in the inner layer of the garment as the skeleton of the garment, which simplifies the garment processing technology and time, making the garment light, beautiful, comfortable, shape-preserving, washable, and durable. Generally, the requirements of hot melt adhesive for interlining processing are colorless and odorless, soft texture, fast bonding, resistance to dry and wet cleaning, glue can not affect the fabric, light resistance, etc. A variety of hot melt adhesives can be used for lining processing, almost all types of hot melt adhesives can be used, the most used are ethylene-vinyl acetate (EVA) hot melt adhesives, polyamide hot melt adhesives and high pressure polyethylene (HDPE) Hot melt adhesive powder, and the hot melt adhesive and processing methods used for different purposes are also different.

Post time: Aug-29-2022