Throughout the lengthy logistics chain, products are continuously subjected to vibration, impact, and static pressure. These physical stresses can lead to product deformation, packaging failure, and subsequent usage issues.

1. Vibration and Impact: "Fatigue" and Fragmentation of Form
Continuous vibration and occasional impacts during long-distance transportation have a cumulative effect on products.

Risk:

Stick Breakage / Granule Dusting: For products that become brittle in cold environments (e.g., winter), sustained vibration and impact can cause adhesive sticks to break or granules to wear at the edges, generating fines. These fines can contaminate clean granules, affecting melt uniformity.

Packaging Wear and Tear: Cardboard box corners can wear and crack under constant vibration, exposing or even damaging the inner packaging.

2. Static Stacking Pressure: Slow "Crushing" Deformation
In containers and warehouses, goods are typically stacked in multiple layers to save space, subjecting the bottom layers to enormous static pressure.

Risk:

Thermoplastic Deformation (Cold Flow): At elevated ambient temperatures, thermoplastic adhesives like EVA and PSA may undergo slow plastic deformation (cold flow) under sustained high pressure over weeks, even below their melting point. This leads to "flattened sticks, granules fused into cakes."

Packaging Collapse: Cardboard boxes with insufficient stacking strength can gradually collapse, losing their protective structure for the contents and potentially causing stack collapse safety incidents.

3. Rough Handling: Sudden Catastrophic Damage
Dropping and throwing during loading and unloading are the most direct causes of packaging breakage and product destruction.

Solutions: Forging Resilient "Armor" and Scientific Logistics Plans

Structural Reinforcement of Packaging:

Internal Positioning and Cushioning: Use internal dividers, positioning trays, or bubble wrap to secure the product's position inside the box, preventing mutual collision and movement.

Enhanced Outer Packaging: Use corrugated boxes with "high edge crush test (ECT) strength," and consider "top-and-bottom lid" or "full overlap slotted container (FOL)" styles to enhance stacking load capacity. For heavy palletized goods, use "stretch wrap" and "corner protectors" for overall reinforcement.

Scientific Loading and Securement Plans:

Inside Containers: Cargo should be stacked tightly without gaps. Use "air bags," "dunnage bags," or "cargo bars" to fill voids between the cargo and container walls, preventing movement during transit.

Stacking Limits: Clearly mark "Maximum Stacking Layers" and "This Side Up" on outer boxes to guide proper warehouse handling.

Adaptive Fine-tuning of Product Design:

For products intended for long sea freight that may experience high temperatures, recommend formulations with "higher cohesive strength" and "higher softening point" to enhance their resistance to pressure deformation (cold flow).

Optimize the shape design of granules/sticks to reduce stress concentration points and improve their inherent impact resistance.