Abstract: A process of manufacturing a non-woven web from virtually endless composite filaments. The filaments used in the process are arranged in a sheath-core arrangement in which the sheath component comprise a thermoplastic polymer and the core component is selected from the group of an elastomer, a water-soluble polymer or a biodegradable polymer. The sheath component constitutes at least 20 percent by weight of the filament and that the core component constitutes at least 10 percent by weight of the filament. The process according to the invention provides a simple and inexpensive process for manufacturing water soluble or elastic non-woven webs of any width, using virtually endless filaments.

Abstract: A plant for removing fines from fiber fluff. The plant includes a forming wire, a forming head which is placed above the forming wire and arranged for air-laying fiber fluff into a layer upon the forming wire, at least one channel for carrying, in a flow of air, fibers from a supply of fibers into the forming head, a suction box placed beneath the forming wire, at least one vacuum fan connected to the suction box for generating an air flow from the forming head, through the fluff, the forming wire, and the suction box to the at least one vacuum fan. The mesh count of the forming wire mainly allow only the fines contained in the fluff to pass through the forming wire. The troublesome and costly filtering of the water used in a hydroentangling process is advantageously eliminated when using fluff, which is freed from fines by means of the plant according to the invention. Air-laid webs produced of the fine-free fibers also have a high quality.

Abstract: A method and plant for producing an air-laid non-woven web of cellulose fibers or of cellulose fibers mixed with synthetic fibers that includes at least one air-laying section for depositing fiber fluff into a layer upon a forming wire, an overlying second wire for transferring the layer of fluff to a third wire having a mesh count small enough for preventing the fibers from penetrating into the wire, and at least one nozzle for directing a water jet towards the fluff on the third wire, thereby hydroentangling the fluff into a coherent web. By the method and plant according to the invention, it is possible to produce hydroentangled fiber webs which are less expensive and have better absorption properties than hitherto known. The webs can be produced with weights between about 20 and 2000 g/m2.

Abstract: A base web is comprising a base web consisting of synthetic fibers, air-laid cellulose fibers or synthetic fibers or cellulose fibers mixed with synthetic fibers air-laid in form of fluff on the base web, and a structure obtained by hydroentangling the fluff on the base web. The weight of the web is between 80 and 2000 g/m2. The heavy-duty webs of the invention can advantageously be used for producing e.g. corrugated board and heat- and/or sound-insulating materials.

Abstract: A plant for removing fines from fiber fluff. The plant includes a forming wire, a forming head which is placed above the forming wire and arranged for air-laying fiber fluff into a layer upon the forming wire, at least one channel for carrying, in a flow of air, fibers from a supply of fibers into the forming head, a suction box placed beneath the forming wire, at least one vacuum fan connected to the suction box for generating an air flow from the forming head, through the fluff, the forming wire, and the suction box to the at least one vacuum fan. The mesh count of the forming wire mainly allow only the fines contained in the fluff to pass through the forming wire. The troublesome and costly filtering of the water used in a hydroentangling process is advantageously eliminated when using fluff, which is freed from fines by means of the plant according to the invention. Air-laid webs produced of the fine-free fibers also have a high quality.

Abstract: A plant that includes two air-lay stations placed one after the other serving for the dry production of a non-woven fiber web. Each station includes a fiber feed duct for feeding fibers to the station from a fiber source, an air-lay forming head connected to the fiber feed duct and at least partly defined by a perforated screen, and a suction box for successively sucking fibers in the forming head through the screen. A separate fiber source is part of each station. The first station furthermore has a fiber collector placed under the screen of its forming head whereas the second station has a forming wire placed under the screen of its forming head. The two stations are connected to at least one conveyor for conveying fibers from the fiber collector of the first station to the forming head of the second station.

Abstract: A plant serves as a mean for production of a fibre web of synthetic fibres, such as plastic fibres and absorbent fibres, such as viscose and cellulose fibres. The plant includes a forming head preliminary to lay a homogeneously and smoothly distributed fibre layer on a net shaped wire. Furthermore the plant includes a hydro-entangling section with liquid nozzles with powerful liquid jets to treat the in the forming head formed fibre layer, which consists of both synthetic—and absorbent fibres. The plant also includes an oven subsequently to thermal bond the synthetic fibres with cross bonds in the affected areas. Finally the dried web is winded up in a roller. By the help of the plant according to the invention, by higher production speed than known previously a fibre web can be produced, which is far cheaper, and which has a better and more homogeneous structure than similar conventional fibre webs.

Abstract: A plant serves as a mean for production of a fibre web of synthetic fibres, such as plastic fibres and absorbent fibres, such as viscose and cellulose fibres. The plant includes a forming head preliminary to lay a homogeneously and smoothly distributed fibre layer on a net shaped wire. Furthermore the plant includes a hydro-entangling section with liquid nozzles with powerful liquid jets to treat the in the forming head formed fibre layer, which consists of both synthetic—and absorbent fibres. The plant also includes an oven subsequently to thermal bond the synthetic fibres with cross bonds in the affected areas. Finally the dried web is winded up in a roller. By the help of the plant according to the invention, by higher production speed than known previously a fibre web can be produced, which is far cheaper, and which has a better and more homogeneous structure than similar conventional fibre webs.