Heavy-duty shock absorption and foam replacement
EPS foam replacement for heavy goods
When shipping industrial motors, heavy appliances, or dense components, standard void fill collapses. This multi-layered block provides the dead-stop density of EPS foam using fully recyclable corrugated board. The layers stack flush against each other, transferring vertical impacts through the entire flute matrix.
Edge protection for large panels
Long, narrow block cushions act as heavy-duty side inserts for items like solar modules or architectural glass. Wedged between the product and the master carton, they absorb lateral shocks and keep the fragile edges isolated from the outer walls.
Bottom cushioning for heavy appliances
Placed beneath washing machines, compressors, or industrial batteries, these blocks elevate the product and absorb transit vibration. The dense stacking prevents the heavy item from punching through the bottom of the master carton.
Void fill for high-weight shipments
For dense machinery parts where crumpled paper or air pillows would immediately burst or flatten, the block cushion fills the empty space with a rigid, unyielding structure that prevents the product from shifting during transit.
Industrial, appliance, and energy sector packaging
Industrial and energy manufacturing
Procurement teams moving away from mixed-material packaging use these blocks to hit sustainability targets without sacrificing heavy-impact protection. Because the blocks rely on straight-line scoring, they fit low-volume, high-mix industrial catalogs where buying custom foam molds is cost-prohibitive.
Appliance and white goods distribution
Distributors shipping heavy household appliances use these dense blocks to replace the traditional EPS foam bases and corner posts, ensuring the packaging remains fully recyclable at the consumer level.
Sustainable packaging transitions
Companies facing regulatory pressure to eliminate plastic foam from their supply chains adopt the 0965 block as a direct, single-material substitute that still provides the necessary dead-stop protection for heavy goods.
When to consider a different internal buffer
High-speed automated packing lines
This block requires severe manual effort. The operator must fold multiple layers of heavy board against accumulating spring-back tension, holding the block tightly with two hands until it is wedged into the outer carton. If the line relies on automated placement or rapid single-hand packing, review pre-glued corner posts or molded pulp instead.
Lighter items needing suspension
If the product is lightweight or requires an elastic, bouncing suspension rather than a dense, unyielding block, review the 0943 accordion spring pad. The 0943 leaves open air gaps between the folds, creating a softer ride for fragile items.
Board thickness, panel count, and delivery state
Flat delivery versus pre-folded stacks
A ten-layer block requires a long, continuous blank of corrugated board. Shipping these blanks completely flat takes up significant pallet space. Discuss whether the converter should supply them partially pre-folded in an accordion stack, trading a slightly higher production economics for drastically lower freight volume.
Board grade and folding fatigue
Heavy double-wall board provides the highest shock absorption, but it exponentially increases the physical resistance operators face when folding the block. The required drop-test performance must be balanced against the ergonomic strain on the packing team.
Panel count and block depth
The final thickness of the cushion is dictated by the board caliper multiplied by the number of panels. The total unwound length of the blank must fit within the converter's machine limits, which becomes a factor for very deep blocks.
Flute direction and crush resistance
The standard 0965 folds across the flutes, which creates maximum rigidity but makes folding difficult. If the product requires a softer cushion or the packing line needs easier assembly, the flute direction can be rotated 90 degrees.
Adjusting block depth, fold allowances, and delivery format
Adjusting panel count for exact depth
The number of panels can be specified anywhere from two to ten or more to match the exact void space in the master carton, ensuring a tight friction fit that prevents the product from shifting.
Modifying fold allowances for thick board
As the layers accumulate, the inner radius of each fold must accommodate the growing thickness of the stack. The transverse creases must be spaced with progressive allowances, otherwise the block will bow, bind, or tear during assembly.
Pre-folding for pallet efficiency
To avoid shipping excessively long flat blanks, the pads can be supplied as pre-folded KDF (knocked-down flat) accordion stacks, which condenses the footprint for transport and storage.
Board and packing details
Friction fit and master carton constraints
The 0965 block has no native locks, tabs, or glue seams. It relies entirely on the boundary constraints of the master box to prevent it from unrolling. The internal dimensions of the outer shipper must be precise enough to hold the block tightly compressed.
Flute direction variants
Along-flute folding (FEFCO 0966)
The standard 0965 folds across the flutes for maximum rigidity. The 0966 variant folds along the flute direction. This makes manual assembly much easier and creates a softer, more elastic cushion, but it sacrifices the extreme dead-stop crush resistance needed for very heavy goods.
Additional notes
Operator ergonomics and spring-back
Folding ten layers of heavy corrugated board is physically demanding. Always request a physical sample to test the ergonomic burden on the packing line before committing to a high-volume run.
Related internal pads and springs
FAQs
Performance and testing
Does this perform exactly like EPS foam in a drop test?
Corrugated board has a different crush profile than foam. Physical drop testing with the specific product, board grade, and panel count is necessary to verify parity for heavy industrial goods.
Assembly and packing
Does the block stay folded on its own?
The board naturally tries to spring back to a flat state. Operators must hold it compressed and rely on the friction of the master carton to keep it tightly rolled or stacked.
Inserts and product fit
Can we add cutouts to fit around our product?
Adding relief cuts, slots, or chamfers to the panels requires custom shaped cutting, which moves the production away from simple straight-line scoring.
Shipping and logistics
How is this delivered to the packing line?
A ten-layer block requires a long, continuous blank. Shipping these completely flat takes up significant pallet space, so they are often supplied partially pre-folded in an accordion stack.
Board and finish behavior
What board grade fits these blocks?
Heavy double-wall board provides excellent shock absorption but increases the physical resistance operators face when folding. The choice depends on balancing drop-test performance against ergonomic strain.
Assembly and packing
Can this be assembled by automated machinery?
The severe spring-back and multi-fold requirement make standard automated placement difficult. It generally requires manual, two-handed assembly or specialized robotics.
Inserts and product fit
How do we determine the right number of panels?
The final thickness is dictated by the board caliper multiplied by the number of panels. The count can be adjusted to match the exact void space in the master carton.
Performance and testing
Why does the flute direction matter?
Folding across the flutes provides maximum dead-stop rigidity. Folding along the flutes makes manual assembly easier and creates a softer cushion, but changes the crush resistance profile.
