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Knowledge of hot melt coating machine:
1. Hot-melt adhesive coating machine: It is a kind of polymer that does not need solvent, no water content, and 100% solid fusible polymer. It is a solid at room temperature, and it melts to a certain degree and becomes fluid. A certain viscous liquid adhesive, coated on a substrate, usually containing composite parts, can be a device that combines another substrate with a gummed substrate.
2. Advantages of the process: There is no need for drying equipment, low energy consumption: no solvent (100% solid content of hot melt adhesive) is not polluted, and the operator does not come into contact with a large amount of formaldehyde due to cleaning of the remaining glue. Compared with the traditional solvent-based and water-soluble adhesives, the following Arabic numerals have an enviable advantage compared to the professional manufacturing of hot-melt adhesive coating machines, and effectively solve the inherent drawbacks of traditional processes. The ideal production tool for fabric replacement.
3. Solvent-based and water-based adhesives require oven curing (or may require renovating existing ovens), occupying more plant space, and increasing plant energy consumption; more waste water and sludge will be generated; Production requirements are more stringent; the disadvantages of solvent glue are obvious, and it is very environmentally unfriendly (most of the solvents are harmful). Solvent-based adhesives cause serious environmental pollution. With the improvement of people's environmental awareness and the establishment and improvement of relevant laws, the use of solvent-based adhesives is declining at a certain rate every year. Water-based adhesives have disadvantages such as poor water resistance, poor electrical characteristics, long drying time, and large energy consumption, and their applications are also declining at a certain rate every year. Hot-melt adhesives have the advantages of stable performance, high material utilization rate, high production speed, high yield, small equipment footprint, and low investment, and have gradually replaced solvent-based adhesives.
4, the characteristics of hot-melt adhesives: The main component of hot-melt adhesives, that is, the basic resin is ethylene and vinyl acetate copolymers made under high pressure, and then with tackifiers, viscosity modifiers, antioxidants made of hot-melt adhesives . 1) It is usually a solid at room temperature and melts to a liquid when heated to a certain degree. Once cooled to below the melting point, it quickly becomes a solid. 2) It has fast curing, low pollution and strong adhesion. The adhesive layer has certain flexibility, hardness, and certain toughness; 3) The adhesive is applied on the adherend and cooled and solidified, and can be reheated and melted. 4) re-adhesive and then bonded to the adherend, with a certain degree of re-adhesion; 5) When used, as long as the hot melt to melt into the desired liquid, and smear on the adhered object, 6) Bonding and curing can be completed within a few seconds after pressing, and hardening and cooling and drying can be achieved within a few minutes. 7) Because the product itself is solid, easy to pack, transport and store; 8) Solvent-free, non-polluting, non-toxic type; 9) And the advantages of simple production process, high added value, viscosity and strength, fast speed, etc. Favored. 10) Hot-melt adhesives have the advantages of stable performance, high material utilization rate, high production speed, and high yield rate. 11) Small footprint and small investment.
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