A wood particle board includes: a core layer formed of resin-covered wood particles with large particle size; at least one surface layer formed of resin-covered wood particles, wherein the at least one surface layer comprises wood particles with particle sizes smaller than the particle sizes of the core layer; and at least one interfoil disposed between a surface layer (1, 4) and the core layer, wherein the at least one interfoil has a surface weight in the range of 5 g/m.sup.2 to 600 g/m.sup.2 and a thickness in the range of 0.05 to 3 mm.

A wood particle board includes: a core layer formed of resin-covered wood particles with large particle size; at least one surface layer formed of resin-covered wood particles, wherein the at least one surface layer comprises wood particles with particle sizes smaller than the particle sizes of the core layer; and at least one interfoil disposed between a surface layer (1, 4) and the core layer, wherein the at least one interfoil has a surface weight in the range of 5 g/m.sup.2 to 600 g/m.sup.2 and a thickness in the range of 0.05 to 3 mm.

A contact layer used in waterproofing and roofing applications. The contact layer includes a solid filler component F and a thermoplastic polymer component P. Also directed to a method for producing the contact layer, to a method for binding two substrates to each other, to a method for waterproofing a substrate, to a waterproofed structure, to a method for sealing a surface against water penetration, to a sealed construction for sealing a substrate against water penetration and to use of the contact layer as waterproofing membrane.

A contact layer used in waterproofing and roofing applications. The contact layer includes a solid filler component F and a thermoplastic polymer component P. Also directed to a method for producing the contact layer, to a method for binding two substrates to each other, to a method for waterproofing a substrate, to a waterproofed structure, to a method for sealing a surface against water penetration, to a sealed construction for sealing a substrate against water penetration and to use of the contact layer as waterproofing membrane.

A method for making a conductive pre-impregnated composite sheet includes the steps of joining a nanomaterial composite sheet, a fiber-reinforcing sheet and a resin system to form a combined sheet, heating the combined sheet, compacting the combined sheet, and cooling the combined sheet to form conductive pre-impregnated composite sheet including the fiber-reinforcing sheet, and the nanomaterial composite sheet coupled to the fiber-reinforcing sheet, wherein the fiber-reinforcing sheet and the nanomaterial composite sheet are embedded in the resin system.

A method for making a conductive pre-impregnated composite sheet includes the steps of joining a nanomaterial composite sheet, a fiber-reinforcing sheet and a resin system to form a combined sheet, heating the combined sheet, compacting the combined sheet, and cooling the combined sheet to form conductive pre-impregnated composite sheet including the fiber-reinforcing sheet, and the nanomaterial composite sheet coupled to the fiber-reinforcing sheet, wherein the fiber-reinforcing sheet and the nanomaterial composite sheet are embedded in the resin system.

A system for forming a facer includes a hydroformer that receives a first fluid and a second fluid. A first fluid line is configured to deliver the first fluid to a first inlet pipe and a second fluid line configured to deliver the second fluid to a second inlet pipe. The first fluid line includes a first fiber source that stores a first type of fibers and a first thick stock pump that pumps the first type of fibers to the first inlet pipe. The second fluid line includes a second fiber source that stores a second type of fibers and a second thick stock pump that pumps the second fluid to the second inlet pipe. The first fluid and second fluid are simultaneously poured or delivered onto a porous belt or surface to form the facer.

A panel (1) has a layered structure including: a first outer layer (2), an intermediate layer (3), and a second outer layer (4). The second outer layer (4) has a buckling stress lower than a buckling stress of the first outer layer (2), and the first outer layer (2) and the second outer layer (4) each have a compression failure stress higher than the buckling stress of the second outer layer (4).

A panel (1) has a layered structure including: a first outer layer (2), an intermediate layer (3), and a second outer layer (4). The second outer layer (4) has a buckling stress lower than a buckling stress of the first outer layer (2), and the first outer layer (2) and the second outer layer (4) each have a compression failure stress higher than the buckling stress of the second outer layer (4).

In an embodiment, a multifunctional material system is provided and can include a variable-permeability layer, a desiccant containing layer, and a vapor-permeable supporting layer. The variable-permeability layer can have a vapor permeability that increases with increasing relative humidity. The desiccant containing layer can be adjacent the variable-permeability layer. The vapor-permeable supporting layer can be positioned adjacent at least one of the variable-permeability layer and the desiccant containing layer. Water moves in a first direction from the variable-permeability layer to the desiccant layer when relative humidity is greater adjacent the variable-permeability layer than the desiccant layer. Water moves a second, opposing direction, from the desiccant containing layer to the variable-permeability layer when the relative humidity is greater adjacent the desiccant containing layer than the variable-permeability layer. The rate of water motion in the first direction is greater than the second direction when the humidity gradient is reversed.