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What causes hot melt adhesive particles to become brittle and prone to breakage in winter? 3 Reasons and Countermeasures

2026-08-14    Views: 9    Chinese

Answer directly

Hot melt adhesive granulesIn winter, it becomes brittle and prone to breakage when used on machines, usually not because the glue is “broken”, but because the hardness and brittleness of the glue particles increase at low temperatures, the humidity in the workshop is low, or the glue particles are damp and repeatedly frozen and thawed. Identifying the root cause and adjusting storage and process parameters can significantly alleviate the issue.

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Why are bars more prone to breakage in winter

  • Low temperature, hardening of rubber particles:After the ambient temperature drops, the glass transition temperature of hot melt adhesive relatively increases, the brittleness of the adhesive particles increases, and it is more prone to cracking during transportation and screw extrusion.
  • Workshop too dry:Heating in winter reduces air humidity, increases static electricity, and makes friction between rubber particles more prone to debris and breakage.
  • Moisture absorption, freezing and thawing:After absorbing moisture, the rubber particles freeze at low temperatures, and when thawed, micro cracks are generated inside, which can break on the machine.

Practical coping strategies

Store the hot melt adhesive particles in a dry and ventilated warehouse at a temperature above 15 ℃, and use them up as soon as possible after opening or seal them for moisture regain; Before starting the machine, increase the temperature of the glue by 2-5 ℃ and ensure that the glue tank remains at a constant temperature. Products with stable quality control, such as Sunlife hot melt adhesive, have uniform particle size, low moisture content, and a lower probability of breakage in winter.

Frequently Asked Questions

Q: Can the broken rubber particles still be used?A small amount of debris can be melted and used normally, but if the whole batch is brittle and the color turns white, it is recommended to test a small sample first before measuring.

Q: Can we directly heat it up to solve the problem?You can slightly increase the temperature, but if the temperature is too high, it will carbonize and affect the bonding. You need to follow the manufacturer’s recommended interval for operation.

Q: Can Guangzhou Sunlife Trading provide winter formulas?Sure, there is a specialized anti freezing and anti brittleness formula for low-temperature environments, which can be customized according to needs.

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