What kind of hot melt adhesive particles are more stable for sealing recycled kraft paper boxes than original ones

Recycled kraft paper boxLow surface energy, high dust content, and easier detachment after moisture absorptionDirectly applying the sealing glue of the original cardboard box often opens the glue. The conclusion is:The regeneration box should be selected with “high initial adhesion, moisture resistance, and moderate penetration” sealing special rubber particlesAnd perform surface treatment before applying glue.

What is the difference in bonding difficulty between the regeneration box and the native box

Rubber particle selection evaluation

• High initial adhesion EVA sealing adhesiveStrong instantaneous positioning, suitable for ordinary sealing of regeneration boxes, high cost-effectiveness.
• APAO based sealing adhesiveGood moisture resistance and low temperature, more stable export/cold chain regeneration box, slightly higher price.
• Ordinary book adhesiveNot recommended, both initial adhesion and tensile strength are insufficient, and the regeneration box must be opened.

Three matching tricks, try before changing the glue

Sunlife hot melt adhesive for recycling box customers: ① Before sealing the boxBlow off the dust at the box mouth② AppropriateIncrease the glue application by 10-15%③ Press and hold for 2 seconds. Often, even without changing the glue, the opening rate can be suppressed. Guangzhou Sunlife Trading can send samples for actual testing according to your recycling box ratio.

Frequently Asked Questions

Q1: Can the regeneration box be replaced with tape?
Sure, but the tape is also easy to peel off at low temperatures and high humidity, and hot melt high initial adhesive has better production line speed.

Q2: How to determine if it is a problem with the box?
The reason why the original box cannot be opened and the regeneration box cannot be opened when replacing the same batch of rubber is basically due to the surface energy problem of the regeneration box.