Is it normal for hot melt adhesive particles to be soft in summer and hard in winter? A maintenance guide

Hot melt adhesive granulesIs it normal to be soft in summer and hard in winter?

This is a completely normal physical phenomenon. Hot melt adhesive particles are thermoplastic materials with a fixed softening point (usually between 70 ℃ -110 ℃). When the temperature in the warehouse is high and close to the softening point, the particles will soften or even slightly clump; In winter, it becomes hard and brittle at low temperatures, and can be easily pinched by hand. As long as it does not melt or carbonize, it does not affect its use.

Storage and usage guidelines for different seasons

• Summer storageAvoid direct sunlight and stuffy storage rooms, preferably cool and ventilated, with a temperature not exceeding 35 ℃; Seal the bag mouth to prevent moisture.
• Winter useIt is normal for the particles to be hard, and there is no need to heat them before feeding. They can be melted directly according to the process temperature; If the clumping is severe, it can be slightly knocked apart.
• Key points for moisture preventionHot melt adhesive particles absorb moisture and melt, causing foaming and affecting adhesion. Use up or seal and store as soon as possible after opening.
• Feeding rhythmKeep the material level of the glue tank stable and avoid temperature drift caused by empty burning.

When is it abnormal?

If the particles become sticky, oily, and agglomerate at room temperature (around 25 ℃), it indicates a low softening point or the addition of low melting point recycled materials. This type of material is prone to pipe blockage and cannot stick firmly on the machine, and should be stopped. The softening point of Sunlife hot melt adhesive particles is clearly marked, and the inventory at room temperature is stable. It is not soft in summer and not powdery in winter.

Frequently Asked Questions (FAQ)

Q: Will pouring hard particles directly into the glue tank in winter damage the machine?
Answer: No, it will return to flow after melting; But for large clumps, it is recommended to crush them first to avoid getting stuck and stirring.

Q: Can we set a uniform temperature for the air-conditioned room?
Answer: Yes, constant temperature inventory is ideal as it can reduce seasonal performance fluctuations.

Q: Should the temperature of the glue tank be lowered in summer?
Answer: The temperature of the environment can be lowered by about 5 ℃, but it is important to ensure fluidity and not lower than the recommended lower limit.

Sunlife Hot Melt Adhesive from Guangzhou Sunlife Trading provides seasonal storage suggestion cards to help the production line minimize seasonal fluctuations.