Why Choose Double wall carton boxes for Heavy Shipping?
If you are shipping heavy electronics, industrial machinery, or fragile glass across Malaysia, a standard box won't cut it. You need the "heavy lifter" of the packaging world: Double wall carton boxes.
But how exactly is a box that can support 30kg+ manufactured? At Sumopack, we don’t just "glue paper together." We follow rigorous industrial standards to ensure our Double wall carton boxes survive the heat, humidity, and rough handling of Malaysian logistics.
Inside the Sumopack Manufacturing Process
1. Material Selection: The "Kraft" vs. "Test" Secret
Everything starts with the paper. A 5-ply box consists of five distinct layers: two outer liners, two fluted mediums, and one center liner. We prioritize high-grammage Kraft Liner for the outermost layer. This virgin wood fiber is more water-resistant than the "Test Liner" used by budget suppliers—critical for Malaysia’s 80% humidity levels.
2. The Corrugation Process (The "BC-Flute" Magic)
The strength of Double wall carton boxes comes from the fluting—those "S-shaped" waves between the liners.
Heating: Fluting paper passes over high-pressure steam rollers.
Lamination: We combine two different flute profiles (usually B-Flute for crush resistance and C-Flute for cushioning) to create a superior BC-Flute combination.
3. Precision Gluing & Bonding
In a 5-ply box, there are four glue lines. At Sumopack, we use specialized starch-based adhesives and infrared sensors to ensure the glue is applied with micron-level precision. This ensures the 5 layers become one indestructible unit.
4. Slitting, Creasing, and Die-Cutting
Our die-cut precision ensures that when you fold the box, the corners meet perfectly with zero gaps. This structural integrity is why our Double wall carton boxes are 30% more stackable than standard market grades.
Need a Heavy-Duty Shipping Solution?
Don't risk your product's safety with single-wall boxes that collapse. Upgrade to Sumopack Double wall carton boxes for humidity-resistant, industrial-strength protection.