An artificial down filling material comprising artificial down clusters (1), wherein each of the down clusters (1) comprise a number of filaments (10) arranged side by side in a bundle, the filaments (10) being bonded, preferably melt bonded, together at a bonding location 20, wherein the filaments (10) are self-crimped, multi-component filaments (10), the cross-section of the multi-component filament having at least three corners (211).

An artificial down filling material comprising artificial down clusters (1), wherein each of the down clusters (1) comprise a number of filaments (10) arranged side by side in a bundle, the filaments (10) being bonded, preferably melt bonded, together at a bonding location 20, wherein the filaments (10) are self-crimped, multi-component filaments (10), the cross-section of the multi-component filament having at least three corners (211).

An improved fiber tow and process for forming the same is disclosed. The fiber tow may include a plurality of mechanically crimped fibers with a primary crimp having a saw tooth crimp shape. For fiber tows comprising fibers with denier per filament of greater than about 5, the plurality of mechanically crimped fibers have an average crimp take-up of greater than about 40%. For fiber tows comprising fibers with denier per filament of less than about 5, the plurality of mechanically crimped fibers have an average crimp take-up of greater than about 30%.

An improved fiber tow and process for forming the same is disclosed. The fiber tow may include a plurality of mechanically crimped fibers with a primary crimp having a saw tooth crimp shape. For fiber tows comprising fibers with denier per filament of greater than about 5, the plurality of mechanically crimped fibers have an average crimp take-up of greater than about 40%. For fiber tows comprising fibers with denier per filament of less than about 5, the plurality of mechanically crimped fibers have an average crimp take-up of greater than about 30%.

An artificial down filling material comprising artificial down clusters (1), wherein each of the down clusters (1) comprise a number of filaments (10) arranged side by side in a bundle, the filaments (10) being bonded, preferably melt bonded, together at a bonding location 20, wherein the filaments (10) are self-crimped, multi-component filaments (10), the cross-section of the multi-component filament having at least three corners (211).

An artificial down filling material comprising artificial down clusters (1), wherein each of the down clusters (1) comprise a number of filaments (10) arranged side by side in a bundle, the filaments (10) being bonded, preferably melt bonded, together at a bonding location 20, wherein the filaments (10) are self-crimped, multi-component filaments (10), the cross-section of the multi-component filament having at least three corners (211).

An artificial down filling material comprising artificial down clusters, wherein each of the down clusters comprise a number of filaments arranged side by side in a bundle, the filaments being bonded, preferably melt bonded, together at a bonding location, wherein the filaments are self-crimped, multi-component filaments, the cross-section of the multi-component filament having at least three corners.

An artificial down filling material comprising artificial down clusters, wherein each of the down clusters comprise a number of filaments arranged side by side in a bundle, the filaments being bonded, preferably melt bonded, together at a bonding location, wherein the filaments are self-crimped, multi-component filaments, the cross-section of the multi-component filament having at least three corners.