Fully transparent elastic hot melt glue stick has the characteristics of good temperature resistance, chemical resistance, corrosion resistance, aging resistance, fast bonding, high strength, non-toxicity, and good thermal stability. Widely used in aerospace, digital electronics, instrumentation, medical equipment, electronic toys and other industries, so what are the key properties to pay attention to in the application of fully transparent elastic hot melt glue sticks? Take a look at the explanation below.
First, the softening point
The softening point of the fully transparent elastic hot melt glue stick refers to the temperature when the glue stick begins to soften, and the performance index is the choice of the application temperature of the fully transparent elastic hot melt glue stick, the higher the softening point, the higher the Tg point, so the factors affecting the softening point of the fully transparent elastic hot melt glue stick are related to the Tg point of each component.
2. Hardness
The hardness of the fully transparent elastic hot melt glue stick directly affects its operation in the hot melt glue gun, the key is that the fully transparent elastic hot melt glue stick can not be soft, the hardness is soft, coupled with high temperature, the hardness will be lower, when in the glue process, because the gel is too soft, it can not be pushed, which affects the glue.
3. Melt viscosity
Viscosity refers to the thin consistency, and the general viscosity is tested by the global method, which refers to the degree of thinness of the hot melt adhesive at 180 °C. The higher the viscosity value, the thicker the hot melt adhesive and the less easy it is to glue. The lower the viscosity value, the thinner the fully transparent elastic hot melt glue stick is, and the easier it is to glue, so the operating fluidity of the fully transparent elastic hot melt glue stick depends on its melt viscosity. During the use of the fully transparent elastic hot melt glue stick, it should be fully preheated in the hot melt glue gun, and it needs to be fully melted before the extrusion operation, otherwise the application performance of the fully transparent elastic hot melt glue stick can not be fully exerted.
