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The most commonly asked question when buying glue is: “What is the difference between hot melt adhesive, 502 instant dry adhesive, AB epoxy adhesive, and self-adhesive? These four categories are actuallyThe curing method is completely differentChoosing the wrong one either won’t stick firmly or won’t improve efficiency. Below is a table and scenario explanation to clarify their differences.
| type | representative | Solidification method | Curing speed | Typical form |
|---|---|---|---|---|
| Hot melt adhesive(EVA type) | Sunlife Books/Images/Packaging/Pearl Cotton Glue | Heating, melting, and coolingPhysical solidificationReversible | Initial solidification in a few seconds, fully solidified in 3-5 minutes (subject to process card) | Solid particles/blocks |
| instant adhesive(Cyanoacrylate) | 502, etc | Encountering trace amounts of water at room temperatureRapid chemical curing | second-level | Liquid small bottle |
| Epoxy adhesive(two-component) | AB glue | A. After mixing BChemical reaction solidification | Hour level | Double tube/two-component |
| pressure-sensitive adhesive（PSA） | Adhesive stickers and tapes | No need to cureUnder pressure, it becomes sticky | instant | Coated on the substrate |
Hot melt adhesive (EVA type)
Instant drying adhesive (Class 502)
Epoxy adhesive (AB adhesive)
Pressure sensitive adhesive (sticker)
Sunlife produces EVA hot melt adhesive and specializes in several production lines including books, graphic printing, packaging, and pearl cotton. If your working condition isContinuous coating, batch binding or sealingHot melt adhesive is almost the optimal solution; If it is a metal structural component or small hard material quick repair, we will objectively explain that it is not the home field of hot melt adhesive. It is recommended to choose epoxy or instant dry adhesive instead of forced replacement. Explain clearly the “materials+environment (temperature/whether soaked in water)+equipment speed”, and Sunlife will match the model and accompanying process card according to the purpose.
A: It cannot be generalized. Using 502 for quick repair of small hard materials is more convenient; But for batch books, packaging, and continuous bonding on production lines, hot melt adhesive far outperforms 502 in efficiency, cost, and consistency. The home games of the two are different, it’s not about who replaces whom.
A: It depends on the working conditions compared to being ‘sturdy’. AB glue is stronger in terms of stress on metal/ceramic structures; Hot melt adhesive adheres quickly and firmly to porous materials such as paper, pearl cotton, and cardboard boxes, and can be used for continuous production line operations. It’s meaningless to talk about ‘who is sturdy’ without considering the material – the selection depends on the material and environment.
There is no “who is the best” for the four types of glue, only “who is in the right direction”. The value of hot melt adhesive lies in its ability to quickly and firmly adhere to the right materials on a continuous production line. If you can’t pick it up on time, giving materials and working conditions to Sunlife, matching the model and process card according to the purpose, is much more stable than choosing glue by name.
Related Reading:What is the difference between hot melt adhesive and water-based adhesive (white latex)? Clear explanation from curing method to selection in one go · What can hot melt adhesive stick? One time explanation of the scope of application and unsuitable scenarios of hot melt adhesive
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