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Introduction Of Melting Point Of EVA Hot Melt Glue Sheet
- Sep 26, 2017 -

      In the formulation, polyethylene is used as the base material of hot melt adhesive, and the purpose of adding poly isobutene and butyl rubber is to prevent polyethylene from dispersing in Geviching wax and increasing the cohesion strength of the hot melt adhesive. The molecular weight and dispersibility of poly-butene are mainly increased by the effect of cohesive strength, the dispersion of butyl rubber is large, the molecular weight is low, and the effect of plasticizing and crystallization is mainly.EVA Hot Melt Glue Sheet

      Hot Melt Adhesive (EVA). Hot Melt adhesive is a kind of solid fusible polymer without water and solvent. At room temperature, hot melts as a solid, heated to a certain temperature after melting, to be able to flow only a cohesive liquid. Hot melts are many kinds of hot melts used for collers bookbinding is polyethylene vinyl acetate.EVA Hot Melt Glue Sheet

     The main ingredient of the hot melts is the resin which is made of ethylene and vinyl acetate under high pressure, which determines the basic properties of the hot melt adhesive. Combined with increasing bonding strength of the adhesive (rosin), adhesive viscosity and solidification speed Regulator (paraffin) and a small amount of antioxidant (di-tert-methyl-benzene brew, etc.) to slow down the aging speed of hot melts. Hot Melt adhesive is mainly used in the binding line of adhesive tape, in the glue pot of bookbinding line will be hot melts after preheating, brushing the back of the book after the milling back.EVA Hot Melt Glue Sheet

     Hot melts can be reheated and reused, and the chemical resistance is strong. Hot melts are not heat-resistant, softening point is low, the use of hot melts should be used to heat, so that solid EVA resin melting. In order to ensure the quality of wireless binding, we should strictly control the temperature used in hot melt adhesive processing. Normal working temperature in 150~180℃, is the best bonding temperature.EVA Hot Melt Glue Sheet

     Preheating temperature of the pot is usually lower than the working temperature 15~20℃. According to the thickness of the book core and the quality of the paper is different, the glue temperature is also different, book core thickness, good paper quality, the working temperature of the glue liquid can be increased to 175~185℃. The higher the liquid temperature, the faster the flow, when the temperature more than 200 ℃, the gum will start to change color aging, solidification time is longer, resulting in the binding quality of wireless binding.EVA Hot Melt Glue Sheet