Disclosed embodiments describe a reconstructed filament comprising natural protein fibrils and an additive. Disclosed embodiments also describe a wool comprising: a plurality of staple fibers formed of reconstructed filaments, wherein the reconstructed filaments comprise natural protein fibrils and an additive. Disclosed embodiments also describe a yarn spun from staple fibers, the yarn comprising: staple fibers comprising reconstructed filament, wherein the reconstructed filament comprises natural protein fibrils and an additive. Disclosed embodiments also describe an item comprising a reconstructed filament, wherein the reconstructed filament comprises natural protein fibrils and an additive.

A medical device in the form of a nonwoven wound dressing includes rotospun fibers including at least one synthetic and bioabsorbable polymer and at least one hydrophilic and/or tissue-adhesive polymer, and a method of producing the medical device including using rotospinning to produce fibers from a fiber raw material including at least one synthetic and bioabsorbable polymer and at least one hydrophilic and/or tissue-adhesive polymer.

A medical device in the form of a nonwoven wound dressing includes rotospun fibers including at least one synthetic and bioabsorbable polymer and at least one hydrophilic and/or tissue-adhesive polymer, and a method of producing the medical device including using rotospinning to produce fibers from a fiber raw material including at least one synthetic and bioabsorbable polymer and at least one hydrophilic and/or tissue-adhesive polymer.

Disclosed embodiments describe a method for manufacturing a staple fiber based on natural protein fiber. The method may include: providing a protein suspension, the protein suspension comprising fibrils of the natural protein fiber; directing the protein suspension through a nozzle onto a surface for forming a protein based fiber; drying the protein suspension on the surface; extracting the fiber from the surface; and providing the staple fiber. Disclosed embodiments may further describe a fiber based raw wool. The raw wool may include staple fibers, wherein the staple fibers are reconstructed on the basis of protein fibrils and are mechanically subdivided from natural protein fibers, wherein the protein fibrils are interlocked by hydrogen bonds, and wherein the raw wool comprises an unoriented, entangled, fluffy network of staple fibers.

The application relates to a method and apparatus for manufacturing a natural fiber based staple fibers. The application further relates to the staple fibers, staple fiber based raw wool and products comprising such. A method comprises providing a cellulose suspension (101, 310, 510) including water, refined cellulose fibrils and at least one rheology modifier, directing the cellulose suspension through a nozzle (102, 320, 520) onto a surface (300, 400, 500), drying the cellulose suspension onto the surface (103, 300, 400, 500) for forming a fiber (350, 550), and cutting the cellulose suspension on the surface for forming staple fibers (105).

A medical device in the form of a nonwoven wound dressing includes rotospun fibers including at least one synthetic and bioabsorbable polymer and at least one hydrophilic and/or tissue-adhesive polymer, and a method of producing the medical device including using rotospinning to produce fibers from a fiber raw material including at least one synthetic and bioabsorbable polymer and at least one hydrophilic and/or tissue-adhesive polymer.

A fiber sheet structure includes a knit weave and has a cell-mounting front surface and a back surface, the average pore size of the back surface is smaller than the average pore size of the cell-mounting surface, the knit weave includes doubled yarn bundles made of gelatin fiber bundle and thermoplastic resin fiber bundle, the thickness of the fiber sheet structure is 30 to 5000 m, the number of gelatin fibers constituting the gelatin fiber bundle is 5 to 60, the fineness of the gelatin fiber is 0.5 to 10 dtex, the total number of gelatin fiber bundles and thermoplastic resin fiber bundles in the doubled yarn bundle is 2 to 20, and the ratio of the number of gelatin fiber bundles to thermoplastic resin fiber bundles in the doubled yarn bundle is 5:1 to 1:5.

A fiber sheet structure includes a knit weave and has a cell-mounting front surface and a back surface, the average pore size of the back surface is smaller than the average pore size of the cell-mounting surface, the knit weave includes doubled yarn bundles made of gelatin fiber bundle and thermoplastic resin fiber bundle, the thickness of the fiber sheet structure is 30 to 5000 m, the number of gelatin fibers constituting the gelatin fiber bundle is 5 to 60, the fineness of the gelatin fiber is 0.5 to 10 dtex, the total number of gelatin fiber bundles and thermoplastic resin fiber bundles in the doubled yarn bundle is 2 to 20, and the ratio of the number of gelatin fiber bundles to thermoplastic resin fiber bundles in the doubled yarn bundle is 5:1 to 1:5.