Various board types (grades) are available for different applications. The strength and rigidity of the carton is determined to a large extent by the board grade selected.
The type of paper liner and fluting as well as the grammage (grams/m2) of the paper used in the board construction determines its strength.
The inner and outer liners can be constructed from either recycled, virgin or test material of varying grammage. The strength of the fluting can also be varied to achieve the desired result.
A comprehensive selection board grades consisting of a wide variety of paper combinations are available for an optimal cost effective packaging solution.
Board constructed from recycled paper/liners
The majority of corrugated containers are constructed from board made out of recycled paper. The strength of the board remains equivalent to board constructed from virgin paper. The strength of the board is achieved by varying the thickness (grammage-g/m2) of the inner and outer liners and/or the fluting.
Board constructed from virgin paper (liners)
Virgin liners have longer fibres than recycled liners and the finish is essentially finer textured than recycled product.
Virgin board has a lower moisture penetration rate (less absorbent) than board using recycled liners.
Virgin board is often used in situations where product is frozen and stored in refrigerated conditions. Also, the finer texture results in improved printing on the container.
Board constructed from a combination of virgin and recycled paper (liners)
The benefit of virgin outer liners at a lower cost can be achieved using a combination of the available liners.
Board constructed from test paper (liners)
Test liners have a mixture of virgin and recycled fibres. The effect is a product very similar to virgin quality at a reduced premium. Combinations of test and recycled liners are available to meet the desired strength and quality.
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