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Select books and magazinesHot melt adhesive granulesI often see a parameter:Open timeIt refers to the time window during which the adhesive can be pressed and bonded onto the spine of a book before losing its stickiness. The window is too short, and if the high-speed line cannot be pressed together in time, the “surface crust” will not stick firmly; If it is too long, the rhythm will slow down and it is easy to draw.
| Gel temperature | Opening hours | performance |
|---|---|---|
| low | Longer but with poor flow | Easy to empty adhesive |
| Recommendation | Normal Window | Adhesive stability |
| relatively high | shorten | Easy to surface crust and false adhesion |
Q: The longer the opening time, the better?
Answer: No, it’s too long and slows down the rhythm, making it easy to draw.
Question: How to choose a suitable window?
Answer: According to the model speed and book type, Sunlife hot melt adhesive process card has recommended values.
Q: Can the opening hours be adjusted on-site?
Answer: It mainly depends on selecting the model, with only minor adjustments to the temperature.
If you can’t understand the parameters, look for Guangzhou Sunlife Trading. Sunlife Hot Melt Adhesive provides a matching plan for opening time according to the model.
Hot melt adhesive is the name of any polymer-based glue applied in a molten state. The application of adhesives is usually carried out through industrial glue guns, which work by triggering actions or finger pressure. Due to its versatility, hot melt adhesives are used in various environments, including packaging, binding, carton manufacturing, graphic arts, tapes […]
Direct answer: High fluidity hot melt adhesive particles are suitable for high-speed production lines, fine nozzle dispensing, thin paper/porous substrate penetration, and large-area pasting; For scenarios such as thick book back adhesive, vertical surface bonding, and heavy load bearing, conventional or high viscosity models are more suitable.There is no superiority or inferiority in liquidity, only […]
Conclusion I need it. Taken from a cold storage or low-temperature environmentHot melt adhesive granules，It must be warmed up to room temperature in the workshop before openingOtherwise, if the outside of the bag is cold and the air is hot, water vapor will condense on the surface of the particles, causing bubbles, white spots, and […]
Hot melt adhesive granulesHow to distinguish between good and bad? Buying hot melt adhesive granules should not only be based on price and color, but also on a set of feasible methods. We compared and evaluated the new material particles and miscellaneous materials from five dimensions, and the conclusion is very intuitive. Five step identification […]
