Global-industrial giant Dow Chemical's plastics company recently developed a new type of epoxy resin that combines the adhesion and fire resistance of general epoxy resins with the flexibility and ease of processing of thermoplastics. Dow experts claim that this is an excellent plastic raw material, because it has excellent oxygen barrier and adhesion, so it is named Blox high insulation resin and Blox high adhesion resin. According to reports, the former is mainly used in the beverage industry as an insulating layer for multi-layer PET bottles. Because of its good transparency, strong adhesion and toughness, it is suitable for oxygen and carbon dioxide-sensitive beverage packaging, and with other insulating resins EVOH and MXD6. Similar prices, slightly better adhesion, it is reported that the isolation of this resin can also be adjusted according to the needs and cost balance. The adhesion, durability, and transparency of Blox's high adhesion resin are better, but the isolation performance is slightly poorer. It can attach well to fiber materials and can also adhere to plastic, wood, metal, and glass. According to Dow Plastics, its current facility to produce this Blox resin has been built with a production capacity of 10,000 tons/year.
Heat energy (hot water, low-pressure steam or heat transfer oil) is introduced into the closed interlayer, and the heat is transferred to the dried material through the inner shell. Driven by power, the tank body rotates slowly, the materials in the tank are constantly turned and mixed, and the heat is received from the inner surface of the wall, so as to achieve the purpose of strengthening drying. The material is in a vacuum state, and the vapor pressure drops to make the water (solvent) on the surface of the material reach a saturated state and evaporate, and is discharged and recovered by a vacuum pump in time. The moisture (solvent) inside the material continuously penetrates, evaporates and discharges to the surface. The three processes are carried out continuously, and the material achieves the purpose of drying in a short time.