Board collapse in humid environments is primarily a factor of moisture ingress degrading fiber rigidity. Our solution involves two phases: 1. Barrier Application: Applying a continuous, low-porosity PE or high-density aqueous barrier coating to the inside surface to drastically reduce the Water Vapour Transmission Rate (WVTR). 2. Structural Over-engineering: Calculating the necessary Edge Crush Test (ECT) strength based on the anticipated maximum relative humidity (RH) during transit. Since moisture can degrade strength by up to 50%, we specify a board grade that maintains the minimum required load capacity even under peak moisture absorption.

The Auto-Lock Bottom (also known as Crash Lock) provides vastly superior vertical compressive strength and improved structural rigidity compared to the friction-locked Straight-Tuck End. The auto-lock mechanism relies on large, geometrically precise glued flaps that engage to form a highly rigid, load-bearing base, minimizing the risk of package failure during stacking. Furthermore, it is engineered for instantaneous, high-speed automated erection, drastically improving throughput on the client’s filling lines.

Chemical migration control is achieved by strictly adhering to a process using Virgin Solid Bleached Sulfate (SBS) board for food contact layers, which guarantees high fiber purity and minimizes the presence of mineral oils and photoinitiators often found in recycled materials (CRB). The ink and varnish systems used on the exterior are certified low-migration and our finished cartons undergo mandatory migration testing using specific food simulants (e.g., 95% ethanol for fatty products) to verify that trace chemical transfer is well below the legally mandated Overall Migration Limit (OML).