THREE-LAYER FABRIC FOR PAPERMAKING MACHINE Russian patent published in 2014 - IPC D21F1/00 

FIELD: textiles, paper.

SUBSTANCE: three-layer fabric (100) for making paper comprises: a group of main longitudinal (MD) upper yarns (1-8); a group of weft transverse (CMD) upper yarns (34, 36, 42) interwoven with the upper MD yarns to form an upper layer (101) of fabric; a group of lower MD yarns (9-16); a group of lower CMD yarns (33, 37, 41) interwoven with the lower MD yarns to form a lower layer (102) of the fabric; and a group of binding yarns (35, 36, 39, 40) located transversely and interwoven with the upper MD yarns that bind the upper layer (101) with the lower layer (102). The binding yarns (35, 36, 39, 40) are located in pairs between two adjacent upper CMD yarns (34, 36, 42), and in the repeating element (104) of the fabric at least one binding yarn (35, 36, 39, 40) of each pair is interwoven with at least one lower MD yarn (9-16). At that each binding yarn (35, 36, 39, 40) passes under the lower MD yarn (9-16), so that the pattern can be defined "over two/under six" between the pairs of binding yarns (35, 36, 39, 40) and the lower MD yarns (9-16) on the lower surface of the fabric. The ratio between the weft yarns and the warp yarns is 4:2. The fabric is 16-heald three-layer fabric.

EFFECT: improved operational properties, stability, durability, drainage capacity and quality of the moulded paper.

11 cl, 3 dwg