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What ishot melt adhesive？
Hot melt adhesive or hot glue is composed of thermoplastic polymers that are applied in liquid form when melted, but become solid again when cooled. Hot glue is used in commercial and residential areas. It is used for various paper products, handicrafts, hobbies, woodworking, assembly, packaging, labels, etc.
The benefits of hot melt adhesive:
EVA (ethylene vinyl acetate) is a polymer suitable for packaging and assembling formulations. It is economically effective at the operating temperature of standard hot melt adhesives ranging from -22 to 176 degrees Fahrenheit (-30 to 80 degrees Celsius). EVA is the most common type of hot melt adhesive used for applications such as packaging and product assembly.
PA (polyamide) is a polymer used in the formulation of adhesives to better resist extreme temperatures and chemicals -76 to 266 degrees Fahrenheit (-60 to 130 degrees Celsius).
Compared to traditional EVA products, polyamide is an expensive product with higher heat resistance.
PP (polypropylene) is a polymer commonly used in spray formulations to produce specific adhesive properties, such as delayed setting time, and is effective at -22 to 230 degrees Fahrenheit (-30 to 110 degrees Celsius).
PUR (Polyurethane) is similar to traditional hot melt adhesives, but the difference is that after curing, PUR absorbs a small amount of moisture. After a few days, the intake of water will cause permanent chemical changes. This chemical change increases the heat and chemical resistance of this adhesive. Chemical reactions allow PUR to form structural bonds similar to epoxy resin, but in a shorter time. PUR is highly suitable for various applications, but is typically used for woodworking.
Terminology related to hot melt:
Opening hours – refers to the time period that can be used to establish bonds.
Viscosity – is a measure of liquid resistance. One of the most important qualities of hot melt adhesive is that it affects the diffusion of the adhesive.
Heat resistance – the temperature at which hot melt adhesive maintains its physical appearance.
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In the packaging industry belt of Guangzhou and the Pearl River Delta, hot melt adhesive is the core material for bonding products such as cardboard boxes, color boxes, and express bags. The performance requirements for hot melt adhesive vary significantly in different packaging scenarios. Choosing the right adhesive type and factory can not only reduce […]
The characteristics of EVA hot melt adhesive: Hot melt adhesive is a solid, fusible polymer that does not require solvents and contains no 100% moisture. It is solid at room temperature and turns into fluid and viscous liquid when heated to a certain temperature. Melted EVA hot melt adhesive is light brown or white. EVA […]
Conclusion first: Factories with large daily shipments and automated production lines have lower comprehensive costs and better anti disassembly properties for sealing boxes with hot melt adhesive particles; For businesses that focus on small batches and manual packaging, adhesive tape is more flexible. The watershed is roughly 500 boxes per day – beyond this amount, […]
