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The boxes with flaps are made on slotters and they can be glued or stapled:
- shaped packages
made by employment of the punching methods using punching dies (own manufacturing of punching dies)
- printing:
for corrugated boards - flexographic methods
for single layer cardboards and lined packages - offset printing
- lined packages
is a technology combining the advantages of the offset printing and strength of the E-flute, B-flute, C-flute, BC-flute and BE-flute corrugated cardboards; lining is possible for 2-layer, 3-layer and 5-layer cardboards
- CARDBOARD BOXES WITH FLAPS
- from the E-flute, B-flute, C-flute, BC-flute and BE-flute corrugated cardboards
- colour: grey, white, marble
- printing: flexographic
Boxboard cuttings to be folded in any configurations or according to FEFCO standards, for instance,
- trays for foil laminating opened from the top
- pizza boxes
- boxes for industrial purposes (electric tools, machine parts, household chemistry, etc.)
- shoe boxes
Punched glued boxes
- displays with perforations
- boxes with a glued block bottom, opened automatically
- boxes with cardboard or plastic handles
- boxes with retractable handles
- boxes for suspending
- advertising stands, columns
Accessories for boxes - any size and shape
- lattices
- separators
- inserts
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The corrugated cardboard is composed of several sheets of paper. The external sheets are straight (smooth) and internal sheets and corrugated (flute). In the case of the biplex board, one sheet is smooth and another one is corrugated.
In the diagram, the structure of the sheets of corrugated cardboard is presented:
- biplex board
(most frequently met in rolls)
- triplex board
- five-layer board
- seven-layer board
- four-layer board
(The designation of bi-, tri-, etc., means the number of paper layers; for instance, the triplex board means two external sheets of paper and one internal sheet called a flute – together three sheets of paper)
- flute height
- the space between
the tops of the flute
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Well-known types of flutes include:
- E-flute (micro-flute)
the flute with a height from 1.1 mm to 1.7 mm. The cardboard with this flute has rather aesthetic values and is suitable for the small packages not containing heavy products inside.
It is frequently used for packaging of spices, gels and cappuccino coffees.
- B-flute
the flute with a height from 2.5 mm to 3.0 mm.
- C-flute
the flute with a height from 3.0 mm to 3.7 mm.
The flutes, which are not used frequently, include:
- A-flute
the flute with a height from 3.6 mm to 4.5 mm.
The flute, which is being withdrawn and seldom met.
- N-flute
the flute with a height of some 0.6 mm.
- X-flute (diagram 1e) - it is a four-layer board, whose two external and two internal sheets are corrugated and whose tops meet.
Five-layer boards are a combination of the types of flutes, mentioned above; generally, this is BC (B+C) flute, but also the combination of EB and EC flutes are met.
The cardboard with a high flute has better elastic properties and higher stiffness and the packages made from such cardboard usually better protect the goods. Whereas,
the cardboard with a low flute has much better resistance to flat compression (FCT) and thus, it is more resistant to impacts, punctures and it is more suitable for being printed.
For production of the corrugated cardboard, different kinds of paper are used, which decide about the quality and strength of the board.
The basic kinds of paper include:
- recycled paper;
- testliner;
- kraftliner;
Another significant factor influencing the quality of the cardboard is
the substance of the used paper. Depending on the manufacturer, the substance of the cardboard (sum of substances of the paper coming into composition of the individual layers of paper)
is given with or without glue (the glue connecting a flute with the external paper).
The substance and kinds of paper used for production of the corrugated cardboard determine their quality and strength.
 The strength of the cardboard
and packages can be measured in different ways; the best known methods include:
FCT - resistance to flat crushing (FCT) - measured in N - means the force, which must be applied to a sheet to cause the refraction of flutes. A sheet of the cardboard placed flat in the press;
ECT - resistance to vertical crushing - measured in N - means the force, which must be applied to a sheet to cause the breakage of a sheet. A sheet of the cardboard placed vertically in the press;
BCT - resistance of a box to compression - measured in N - the test consists in compressing the box between two parallel plates until the side walls of the cardboard box are broken.
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