Abstract

A process for the manufacture of a functional pre-preg mat of ligno-cellulosic material is disclosed. In said process, pulp fibres are mixed with at least one functional solution including a cross-linking formulation. The cross-linking formulation has been prepared by dissolving at least one cross-linking agent in a water or alcohol based solvent at a temperature below 120° C. Pulp fibres treated with the at least one functional solution are then formed into an continuous mat. The mat of pre-preg ligno-cellulosic pulp fibres formed in the previous step is transferred to a drying step during which the temperature within the ligno-cellulosic mat is kept below 120° C. A functional pre-preg mat of ligno-cellulosic material suitable for use as raw material in a thermoforming process is also disclosed.

IPC Classes  ?

• D21H 11/20 - Chemically or biochemically modified fibres
• C08J 3/24 - Crosslinking, e.g. vulcanising, of macromolecules
• C08J 5/06 - Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
• D21J 3/00 - Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds

Abstract

The object of the invention is a process for the manufacture of a functional pre-preg mat of ligno-cellulosic material. In said process, pulp fibres are mixed with at least one functional solution including a cross-linking formulation. The cross-linking formulation has been prepared by dissolving at least one cross-linking agent in a water or alcohol based solvent at a temperature below 120°C. Pulp fibres treated with the at least one functional solution are then formed into an continuous mat. The mat of pre-preg ligno-cellulosic pulp fibres formed in the previous step is transferred to a drying step during which the temperature within the ligno-cellulosic mat is kept below 120°C. A further object of the invention is a functional pre-preg mat of ligno-cellulosic material suitable for use as raw material in a thermoforming process.

IPC Classes  ?

• C08J 5/06 - Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
• B27N 3/04 - Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
• B27N 3/12 - Moulding of mats from fibres
• C08L 1/02 - CelluloseModified cellulose
• D04H 1/58 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
• D21C 9/00 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
• D21H 11/20 - Chemically or biochemically modified fibres
• D21H 17/06 - AlcoholsPhenolsEthersAldehydesKetonesAcetalsKetals
• D21H 17/15 - Polycarboxylic acids, e.g. maleic acid

IPC Classes  ?

• B27N 3/04 - Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
• B27N 3/12 - Moulding of mats from fibres
• C08J 5/06 - Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
• C08L 1/02 - CelluloseModified cellulose
• D04H 1/58 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
• D21H 11/20 - Chemically or biochemically modified fibres
• D21H 17/06 - AlcoholsPhenolsEthersAldehydesKetonesAcetalsKetals
• D21H 17/15 - Polycarboxylic acids, e.g. maleic acid