Agroblock, such as agroplug, agroplug system and a plug strip therefor
AssigneeRockwool Lapinus B.V.
InventorsLucas E. M. Langezaal, Jacob F. de Groot
Life of this patent
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Abstract
The invention relates to an agroblock comprising an inorganic soil type, such that the agroblock is substantially form-retaining at any moisture content and that at a suction pressure of pF 2 the moisture content amounts to at least 15% by volume. Preferably the agroblock comprises a homogeneous mixture of mineral wool and said inorganic soil type, wherein the quantity of mineral wool amounts to 0-90% by weight, and the amount of soil type amounts to 100-10% by weight.
Claims20
Agroblock comprising an inorganic soil type, such that the agroblock has a density of 25-1100 kg/cm.sup.3, is substantially form-retaining at any moisture content and that at a suction pressure of pF 2 the moisture content amounts to at least 15% by volume.
Agroblock system for supporting agroblocks comprising a tray and at least one plug strip, said tray having at least one groove which receives said plug strip, said plug strip having a passage opening which receives said agroblock, said agroblock comprising an inorganic soil type, such that the agroblock has a density of 25-1100 kg/cm, is substantially form-retaining at any moisture content and that at a suction pressure of pF 2 the moisture content amounts to at least 15% by volume.
Agroblock comprising 10-50% by weight mineral wool, 90-50% by weigth of hydrophilic clay particles having a particle size below 20 micrometers and up to 15% by weight of a binder, said agroblock having a density of 25-1100 kg/m.sup.3, a porocity of at least 50% and a moisture content of at least 15% by volume at a suction pressure of pF 2.
Dependencies are inferred from the claim text.