Protective Isolation Inside Master Cartons
Glass and fragile liquids
Isolates bottles and jars, reducing the risk of glass-to-glass contact and buffering against side impacts during transit.
Heavy machined parts
Distributes weight and restricts metal components from shifting against each other inside the master shipper.
High-value electronics
Separates individual devices or components, keeping them away from the outer walls where handling impacts are most likely.
Multi-component kitting
Organizes different parts of a set into dedicated cells, making unpacking easier while keeping items separated.
Fragile Goods and Heavy Components
Beverage and cosmetics
Helps protect primary packaging finishes without requiring individual bubble wrap or foam pouches.
Industrial kitting
Organizes multiple components into a single master shipper for easier inventory counting and unpacking.
E-commerce fulfillment
Provides an internal buffer zone for fragile items moving through mixed courier networks.
Flush Dividers and Alternative Inserts
Tight master cartons
If the outer box cannot accommodate the extra perimeter air gap, a standard flush partition may be a better fit.
Low-volume or highly variable packing
If cell sizes change frequently, adjustable foam or die-cut inserts might be easier to manage than rigid corrugated grids.
Cell Sizing, Flute Choice, and Assembly Planning
Board flute and cushioning
A or C flute offers more thickness for heavy items, while E flute provides a denser grid for smaller, lighter products.
Assembly labor
The strips must be slotted together before use. High volumes often justify automated partition assemblers, while lower volumes rely on hand assembly.
Master carton sizing
The extended ends add width and length to the overall grid footprint. The outer box must be sized to accommodate this larger dimension.
Cell dimensions
Internal cell dimensions should be slightly larger than the product to allow for easy insertion, while remaining tight enough to restrict excessive shifting.
Grid Configuration and Buffer Depth
Cell count and dimensions
The grid can be configured for different row and column counts to match the exact product assortment.
Perimeter extension length
The depth of the outer buffer zone can be adjusted based on the fragility of the contents and the available space in the master carton.
Slot chamfer angles
The angled lead-ins at the top of each slot can be modified to help guide the intersecting strips together during hand assembly.
Packing details
Slot width and board caliper
The interlocking slots are cut to match the exact thickness of the chosen corrugated board. Changing the board grade later requires recalculating the slot width to prevent the grid from binding or fitting too loosely.
Chamfered lead-ins
The top of each slot features an angled cut, which helps guide the intersecting strips together during hand assembly.
Additional notes
Friction fit stability
The grid relies entirely on the depth and width of the intersecting slots to stay together. Once assembled and placed in the master carton, friction keeps the partition intact without tape or adhesive.
Related Internal Partitions
FAQs
Do these partitions arrive pre-assembled?
No, the longitudinal and transverse strips are delivered flat in dense bundles. They must be slotted together before being placed into the master carton.
How do I determine the right cell size?
The internal cell dimensions should be slightly larger than the maximum width of your product to allow for easy insertion and removal, while remaining tight enough to restrict excessive shifting.
Does the perimeter buffer change the master carton size?
Yes. The extended ends add width and length to the overall grid footprint. The master carton must be sized to accommodate this larger outer dimension.
Does this grid add strength to the outer box?
Yes. The intersecting vertical walls act as internal columns, adding vertical support to the master carton.
Can I change the board thickness later?
Changing the board flute requires updating the slot widths. If the slots are too narrow, the strips will bind; if too wide, the grid will be loose.
Are these difficult to assemble by hand?
The slots feature angled lead-ins to help guide the pieces together. However, grids with high cell counts can become tedious to assemble manually at high volumes.
Can these partitions be printed?
They are usually left unprinted since they serve as internal protection, but they can be printed if the unboxing presentation requires it.
How are these shipped?
They are shipped flat as separate slotted strips, which allows for extremely dense palletization and reduces shipping volume.
