How can an instrument factory reduce the damage rate of honeycomb cardboard cushioning packaging bonded with hot melt adhesive particles

A factory that exports precision instruments used BOPP tape to fix honeycomb cardboard liners. However, due to rough shipping, the liners shifted and instrument edges were damaged, resulting in a high return rate. Later, it was changed toHot melt adhesive particles are glued and fixedLet’s break down this set of tactics and talk about it.

Where is the problem

Honeycomb cardboard is lightweight and has good cushioning, butLow surface energy and numerous poresThe tape will peel off when compressed for a long time; And the tape is prone to aging in high temperature and high humidity cargo holds. What the factory needs is a bonding method that combines instant positioning and long-lasting adhesion.

How to replace with hot melt adhesive particles

• SelectionSunlife hot melt adhesive recommends high initial adhesion and medium temperature EVA pellets, with a melting point of about 82 ℃, which will not damage the cardboard.
• SizingUse a glue dispenser to apply 4-6 adhesive dots at the contact point between the honeycomb cardboard and the corrugated outer box, with each dot weighing approximately 0.6g.
• laminationPosition and press firmly within 3 seconds after dispensing, leaving enough time for manual alignment.
• solidifyDry with a stopwatch at room temperature for 10 minutes and reach the handling strength in 30 minutes.

Result

Knowledge Accumulation

honeycomb cardboardCannot use high-temperature adhesiveOtherwise, it will shrink and deform due to hot pressing; The adhesive point should be applied to the “solid contact area” rather than the honeycomb hole, otherwise it will be sticky. Guangzhou Sunlife Trading will help the factory solidify the rubber particle model into the BOM, and the workers who change jobs can reproduce it according to the parameters.

Frequently Asked Questions

Q1: Can ordinary sealing rubber particles be used for honeycomb cardboard?
Yes, but the initial adhesion should be sufficient and the melting point should not exceed 90 ℃ to avoid damaging the paper surface.

Q2: How to determine the dispensing amount?
According to the contact area, generally every 10cm ², there is a 0.5-0.8g adhesive point, and the sample is tested first before calibration.