How to seal edges with hot melt adhesive

发布时间：2021-05-20 0

1　Temperature during edge sealing
Since the performance of edge-banding hot melt adhesive is affected by temperature, temperature is an indicator that requires attention during the edge-banding process. The temperature of the hot melt adhesive, the temperature of the base material, the temperature of the edge banding material and the temperature of the working environment (the workshop where the edge banding machine is located) are all very important edge banding parameters during edge banding. In the automatic edge banding machine, since the glue is applied to the substrate, the substrate with too low temperature will cure the hot melt adhesive in advance, which will cause the glue to stick to the substrate, but the edge sealing material will not stick to the temperature of the substrate. It is best to keep it above 20°C. The working environment temperature of the edge banding machine will affect the curing speed of the glue. Factories often have edge sealing problems in low temperature seasons. The reason is that the curing speed of hot melt adhesives at low temperatures increases and the effective time for bonding is shortened. If the feeding speed of the edge banding machine cannot be changed (in most cases), the plate and edge banding material must be preheated to ensure the quality of the edge banding.

2　The processing of edge banding glue line
After edge sealing, the glue line between the board and the edge band will adversely affect the appearance of the panel furniture. If the amount of glue is too large, the glue line will be obvious. On the contrary, it will reduce the edge banding strength. For the discontinuous or uneven glue line phenomenon, the reasons are many, and the following factors should be considered: The cutting accuracy of the plate, the edge of the plate must maintain a 90° angle with its plane; edge banding machine Whether the pressure of the pressure roller is evenly distributed and the size is appropriate, and the pressure direction should be at a 90° angle to the edge of the sheet; whether the glue roller is intact, whether the hot melt glue is even on it, and whether the amount of glue is appropriate; the sealed sheet should be stored as much as possible In a clean, less dusty place, avoid dirty things in contact with the glue line during the finishing process.