What can be used to heat hot melt adhesive particles? Four Correct Adhesive Melting Methods and Temperature Setting Tutorial

hot melt adhesiveParticles must be usedControllable temperature electric heating equipmentThere are only four formal methods for melting: glue pot (glue box), glue gun/handheld glue applicator, glue machine heating pipeline, and pasting equipment with heating rollers.It is strictly prohibited to use open flames, induction cookers, microwaves, or hot water pots for heating——Uncontrolled temperature can cause the glue to carbonize and is also prone to splashing and scalding.

Comparison of Four Correct Heating Methods

How to set the temperature correctly

The principle of passage is:Set temperature=softening point+60-80 ℃For example, for book and magazine type rubber particles with a softening point of 95 ℃, it is more reasonable to set the pot temperature between 155-175 ℃. If it is too low, it will cause wire drawing, glue breakage, and weak adhesion; If it is too high, it will smoke, turn yellow, produce black residue, and shorten the service life of the adhesive.

Standard operation five steps

• The first stepPreheat the machine, usually 20-30 minutes, and wait for the temperature to stabilize before adding materials. Do not add while heating up.
• The second stepConfirm that the rubber particles are dry and free of clumps, and spread out the damp materials to dry or discard them directly.
• Step ThreeSlowly add along the pot wall, keeping the liquid level between 1/3 and 2/3, and replenish as needed.
• Step FourTry to apply three adhesive lines and observe if they are continuous and if there are any bubbles before entering formal production.
• Step FiveBefore shutting down, cool down to standby temperature. If the production is stopped for a long time, empty and clean the pot.

Choosing glue also affects heating efficiency

Colloidal particles with uniform particle size and no dust melt faster and have smaller temperature fluctuations. Sunlife hot melt adhesive from Guangzhou Sunlife Trading controls particle size consistency in the granulation process. Regular models for books, magazines, and packaging can stably produce adhesive at 150-170 ℃ without the need for “high temperature” hardening, which saves energy and reduces carbonization. For the first time on the machine, we can provide recommended parameters for temperature and operating time based on the customer’s device model.

Frequently Asked Questions

Q: Is it possible to use a rice cooker or induction cooker to melt glue?
Answer: It’s not possible. This type of equipment has poor temperature control accuracy, and local temperatures can easily exceed 250 ℃. The glue will carbonize and release irritating smoke.

Q: Can the adhesive particles melt repeatedly?
Answer: Yes, but there are limitations. Repeated high temperatures for a long time can cause viscosity to decrease and color to darken. It is recommended to use up the glue in the pot during the shift.