The Proper Use Of Hot Melt Adhesive Membrane
Glue like medicine, the right medicine to cure, the same, for the material does not need a different hot melt adhesive film to bond. No pain material, different surface features are not the same, so they rely on the bonding principle is not the same. According to the nature of the material was sticky, choose the appropriate hot melt adhesive membrane, in order to obtain the ideal bonding effect. In addition, the choice of hot melt adhesive film also need to have good operability, durability.
The contaminants adhering to the surface of the adherend are hindered by the formation of the adhesive, and of course, the adhesive effect is lowered, and the bonding surface is required to be pretreated. Use physical or chemical methods to remove contaminants, resulting in an ideal bonding surface. Metal surface treatment methods are many. General metal material is sanded with sandpaper until the exposed surface exposed metallic luster, and then fully cleaned with trichlorethylene, can be used after drying.
The surface treatment of fibrous fabrics is generally carried out by impregnation. The current market circulation of synthetic fibers is mainly rayon, nylon, polyester and aramid. Rayon, nylon fiber, can be treated with REL impregnation, can get zero bonding effect. Polyester, aramid surface lack of polar genes, low water absorption, can not be directly treated with REL impregnation. You can be treated with phenol-terminated isocyanate and epoxy resin solution and then treated with REL.
Adhesive temperature is a special element used in hot melt adhesive membrane. Because the hot melt is in a certain temperature conditions began to melt, so the need for special attention. When the sizing temperature is too low, the hot melt adhesive membrane can not be fully melted, poor mobility, glue can not be a good penetration. When the sizing temperature is too high, hot melt film melting too much, if not adjust the hot pressing time will lead to excessive osmosis glue layer caused by plastic. When the sintered temperature reaches 200 degrees Celsius or more, it will cause sintering phenomenon, hot melt film will produce a certain degree of carbonation, resulting in poor bonding effect.
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