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There is no separate “drop standard” for sealed hot melt adhesive particles, and the industry is concerned about itWhole box drop test——If the sealed cardboard box is dropped according to the national standard/transportation standard and the glue seam does not open, it is qualified. The core reference is GB/T 4857.5 Drop test, as well as the 1.2m angle drop requirement commonly used in e-commerce.
| Transportation Scenario | Reference drop height | Attention points of adhesive particles |
|---|---|---|
| Short distance less than truckload | 0.6–0.8m | Basic initial adhesion |
| express e-commerce | 1.0–1.2m | High initial adhesion+tensile strength |
| Export shipping by sea | 1.2m+temperature and humidity cycle | Weather resistant+low odor |
Rough measurement without equipment: sealed boxLifting the angle and shaking in the airIf it falls freely on the cement floor at a height of 1 meter, it will be unqualified if the glue is opened. The sealing special adhesive particles for Sunlife hot melt adhesive (Guangzhou Sunlife Trading) are designed to drop 1.2m, and customers can request a sampling machine for testing.
Q1: Is the glue not working properly or is the box not working properly?
It’s all possible. Recycled cardboard boxes have low yield and are easy to peel off. First, compare the original cardboard boxes and then judge the adhesive.
Q2: How long is the most accurate measurement after sealing the box?
Let it stand for at least 24 hours. The adhesive has just been sealed and is not completely cured, so the measurement is inaccurate.
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