Board Definitions

CorrugatedCorrugated has two main components: the linerboard and the medium. The medium is the wavy, fluted paper in between the liners. Linerboard is the flat facing that adheres to the medium. Corrugated
Single FaceSingle face corrugated fibreboard is made by gluing a flat sheet of linerboard to a sheet of corrugating material which has passed through a “single facer” which formed it into a series of arches. Single Face
Single Wall or Double-Faced In single wall (also know as double face) corrugated fibreboard, one flat facing is glued to each side of the corrugated member. It is manufactured in various kinds and grades and in A, B & E flute forms which differ in height and count per foot. Single
Double WallDouble wall corruagated fibreboard has three flat facings and two corrugated members combined in the following sequence – a facing, a corrugated member, a (center) facing, a corrugated member, and a facing. doublewall
Triple WallSeven sheets of paperboard are used in the construction of triple wall corrugated fibreboard. They are combined as follows – a facing, a corrugated member, an inner facing, a corrugated member, an inner facing, a corrugated member and a facing. Triple Wall
FlutesThe flutes serve as protective material and an insulator, providing some product protection from sudden temperature changes. At the same time, the vertical linerboard provides more strength and protects the flutes from damage.The strength of a corrugated box starts with its material. A corrugated sheet
consists of two major components – linerboard and medium. Linerboard is the flat
paper that covers both sides of the sheet and the medium is the “fluted” or
arched paper found between both liners. The flute, when anchored to the
linerboards with a starched-based adhesive, resists bending and pressure from
all directions. When placed vertically on its ends, the flutes form vertical
columns, capable of supporting considerable amounts of weight.Flutes come in five basic heights and shapes – the most common are
“B-Flute”(used for die-cut boxes) and “C-Flute (used for RSCs). B-flute is
compressed and appears thinner, but don’t be fooled. It is made with more paper
to provide stronger side wall protection from blows and punctures. C-flute is
taller, with more air space, but offers enhanced stacking strength. For
excellent graphic reproduction, consider E-flute.The amount of virgin pulp fibers and the length of those fibers in a
corrugated sheet substantially contribute to box strength. For example, the
difference between a 200# test box and a 275# test box is that the latter has
more pulp fibers in its corrugated linerboard. The 200# test box is rated to
hold up to 65 lbs. of box and contents while the 275# box can hold up to 95 lbs.
A 350# test box is rated to hold up to 120 lbs. of box and contents. The
following chart shows Bursting Test and Edge Crush Test performance standards of
corrugated box liners based on the combined weight of a box and its
contents.
flutes
SCORINGA machine-made depression in the box blank to aid in folding the box into its shape.SCORING ALLOWANCESA score made on the surface of corrugated sheet will penetrate to the middle of the sheet when the sheet is folded. Scoring Allowances are critical to proper box measuring.
PARTITIONmade from a variety of media, slotted strips are fitted together to form cells, into which product can be placed and kept apart from product in other cells. PARTITION
BUILD-UPSLaminated layers of corrugated pads for special thick cushioning or filler purposes. Build Ups
HONEYCOMB BOARDContinuous hexagonal cells faced with kraft paper. Strong and economical core material used for inner packing. HONEYCOMB
CORNERBOARDMade of heavy kraft paper glued in layers. Are used to stabilize strapped or stretch wrapped loads, provides additional support when double stacking, eliminates shifting loads, protects products in storage and during shipping CORNERBOARDS

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