SYNTHETIC FIBER, METHOD FOR PRODUCTION, CEMENT PRODUCT CONTAINING FIBER, AND METHOD FOR OBTAINING CEMENT PRODUCT Russian patent published in 2008 - IPC D01F8/06 D01F8/14 C04B16/06 D01F8/04 D06M10/02 C04B16/04 

FIELD: chemistry.

SUBSTANCE: invention concerns double-component synthetic fiber fit for spatial reinforcement of cement products. Synthetic fiber is a double-component fiber of core/shell type with surface shell tension over 45 mN/m. Core component is a complex polyether or copolyether with elastic constant over 8000 MPa and relative breaking extension under 20%. Shell component is a polyolefin resistant in media with pH over 11. Double-component fiber is obtained by shell and core components forming into double-component composition with the help of spinneret. Primary yarn drafting, thermal stabilisation, drying and cutting are performed. Before melting one or more hydrophilic substance and/or surfactant are introduced to shell component. Synthetic fiber dispersion is used to prepare cement product based on concrete mix or mortar, or cement paste.

EFFECT: reduced shrinkage fissure level, eliminated low tension durability and brittle failure due to spatial reinforcement of cement product by fiber.

26 cl, 11 ex, 7 tbl