A method and a mineral wool product include a multiple of lamellae, such as a sandwich panel core. The product includes a plurality of lamellae cut from a mineral wool web, and bonded together by applying an adhesive on the surfaces of two adjacent lamellae to form a web-like product, wherein the adhesive comprises at least one hydrocolloid.

The invention relates to a mineral wool product comprising mineral fibres bound by a cured binder wherein the binder in its uncured state comprises at least one protein, and at least one enzyme.

An object of the present invention is to provide a carbon sheet to be used suitably for a gas diffusion electrode, in which the carbon sheet does not worsen the electrical resistance in the through-plane direction, and can be prevented from the deflection into the gas flow channels provided in the bipolar plate, although such characteristics. A carbon sheet according to the present invention, provided to achieve the above-described object, is a carbon sheet including a first surface and a second surface located at the opposite side to the first surface; wherein, assuming that a specific section is equally divided into 20 portions in the thickness direction to form 20 layers, the degree of fiber orientation of the first surface side outermost layer of the 20 layers is 1.20 or more and 3.00 or less; and wherein, assuming that a region composed of consecutive layers that are included in the 20 layers, and satisfy specific conditions is a first surface side region, and that a region composed of a layer(s) included in the 20 layers but not included in the first surface side region is a second surface side region, the thickness of the first surface side region is 40% or less of the thickness of the whole carbon sheet, and a difference between the average degree of fiber orientation of the second surface side region and the degree of fiber orientation of the first surface side outermost layer is larger than 0.10.

Siliconized fibrous webs are described. The siliconized webs include a fibrous web saturated with an electron beam cured silicone composition. Siliconized webs with electron beam cured silicone coating are also described. Methods of preparing both the coated and uncoated siliconized fibrous webs are also described.

Siliconized fibrous webs are described. The siliconized webs include a fibrous web saturated with an electron beam cured silicone composition. Siliconized webs with electron beam cured silicone coating are also described. Methods of preparing both the coated and uncoated siliconized fibrous webs are also described.

The invention relates to a formaldehyde-free binder composition for mineral fibres comprising at least one phenol and/or quinone containing compound, and at least one protein.

The invention relates to a method of bonding together surfaces of two or more elements, whereby at least one of the two or more elements is a mineral wool element, said mineral wool element(s) being bound by a mineral wool binder, the method comprising the steps of providing two or more elements; applying an adhesive to one or more of the surfaces to be bonded together before, during or after contacting the surfaces to be bonded together with each other; curing the adhesive, wherein the adhesive comprises at least one protein; at least one phenol and/or quinone containing compound, and/or at least one enzyme.

A wadding structure for use as padding, characterized in that it comprises a plurality of fibres bound together by means of a resin with variable-density uniform finish. The variable-density finish may have a higher or lower density according to the need. The density of the finish entails a variation of the thickness of the product, which on average can guarantee a bulk 30% greater than that of a wadding produced in a traditional way with resin-spraying finish. A greater bulk of the product entails a greater heat value, typically approximately 20% greater, as it is precisely the amount of air embedded in the structure of the wadding that determines its thermal insulation.

A wadding structure for use as padding, characterized in that it comprises a plurality of fibres bound together by means of a resin with variable-density uniform finish. The variable-density finish may have a higher or lower density according to the need. The density of the finish entails a variation of the thickness of the product, which on average can guarantee a bulk 30% greater than that of a wadding produced in a traditional way with resin-spraying finish. A greater bulk of the product entails a greater heat value, typically approximately 20% greater, as it is precisely the amount of air embedded in the structure of the wadding that determines its thermal insulation.

Aqueous binder compositions with reduced rates of salt precipitation are described. The compositions may include a carbohydrate and a sequestrant for sequestering one or more multivalent ions (e.g., Ca.sup.2+, Mg.sup.2+, Ba.sup.2+, Al.sup.3+, Fe.sup.2+, Fe.sup.3+, etc.). The sequestrant reduces a precipitation rate for the multivalent ions from the aqueous binder composition. Methods of reducing salt precipitation from a binder composition are also described. The methods may include the steps of providing an aqueous binder solution having one or more carbohydrates. They may also include adding a sequestrant for one or more multivalent ions to the aqueous binder solution. The sequestrant reduces a precipitation rate for the multivalent ions from the binder composition.