Is the first board of hot melt adhesive particles not sticking firmly when starting up? Avoid these 5 misconceptions first

Direct answer: Most of them are due to insufficient heat penetration, not poor glue

The first few books and cardboard boxes couldn’t stick firmly when turned on, but then it became normal – this is almostHot melt adhesive granulesThe most common phenomenon in use. The root cause is usually that the temperature displayed on the glue cylinder has reached, but the glue has not yet fully penetrated, or there are still old glue cold sections left in the pipeline or nozzle from the previous time. Misunderstanding glue as having problems and repeatedly changing materials often results in wasted money.

5 high-frequency misconceptions

• Misconception 1: Start working when the temperature is displayed. The displayed temperature is the cylinder wall or probe temperature, and the center of the colloid is often more than ten degrees away, requiring an additional 10-15 minutes of constant temperature.
• Misconception 2: Setting the temperature higher can make it faster. Exceeding the upper limit will cause carbonization and coking, produce odors, and even block the nozzle.
• Misconception 3: If the first board is not firm, it means buying poor glue. If the same batch continues to function normally, it indicates that it is a process rather than a material.
• Misconception 4: No need to dispose of waste glue. The old glue in the pipeline has been repeatedly heated and degraded, resulting in a significant decrease in adhesion. It must be drained before being activated.
• Misconception 5: Just fill up the tank. Adding too much at once will lower the temperature of the entire cylinder, forming a localized cold zone.

Correct startup sequence

Sunlife hot melt adhesive comes with a brand and process card, indicating the recommended adhesive temperature and preheating time; Guangzhou Sunlife Trading can also assist in organizing the startup process into workshop dashboards to reduce the pitfalls of shift handover.

Shift handover and prolonged downtime

If there is a downtime of more than one hour during lunch break or shift handover, it should also be treated with “constant temperature and glue discharge” when starting again, and cannot be directly continued. It is recommended to use up or drain the remaining glue in the rubber cylinder as much as possible before the long holiday shutdown, to avoid long-term high-temperature insulation that may cause the entire cylinder to degrade and coke. Starting up after the holiday is both time-consuming and prone to clogging. A signboard next to the equipment indicating the preheating time and the number of adhesive discharges is much more reliable than verbal handover.

Frequently Asked Questions

Q1: Is it considered a defect if the first board is not firm after replacing with a new brand of adhesive?
First, follow the preheating and rubber removal process according to the temperature of the new brand, and most of them will recover; Still unable to contact the supplier for parameter review.

Q2: Can the scrapped parts on the first board be recycled?
Paper products are not recommended to be returned to the furnace as the glue has contaminated the paper fibers. It is safer to dispose of them directly.