SYNTHETIC FIBER FOR VOLUME REINFORCEMENT OF CEMENT PRODUCT AND METHOD FOR ITS MANUFACTURE (OPTIONS), CEMENT PRODUCT CONTAINING DISPERSION OF SYNTHETIC FIBER, AND METHOD FOR ITS MANUFACTURE

摘要

1. Synthetic fiber for bulk reinforcement of a cement product, characterized in that it is a core / clad coaxial fiber, where the core contains a thermoplastic polymer, and the shell either! a) contains a thermoplastic polymer that is resistant to a medium having a pH 11, as well as one or more hydrophilic and / or surfactants in an amount of 3-30 wt.% of the total shell weight, or! b) the shell contains a thermoplastic polymer that is resistant to a medium having a pH 11, grafted with active or unsaturated monomers of one or more types, constituting 3-25 wt.% of the total weight of the shell, and the surface tension of the shell is at least 45 mN / m ! 2. The fiber according to claim 1, characterized in that its shell consists of a thermoplastic polymer resistant to a medium having a pH 11, grafted with active or unsaturated monomers of one or more types, comprising 3-25 wt.% Of the total weight of the shell. ! 3. The fiber according to claim 1 or 2, characterized in that the active or unsaturated monomers are selected from the group consisting of isobutylene, alpha-methyl styrene, vinyl alkyl esters, isoprene, butyl acrylate, methyl acrylate, methyl methacrylate, butyl acrylate, butyl methacrylate, butadiene and styrene. ! 4. The fiber according to claim 1, characterized in that the hydrophilic substance is a hydrophilic polymer or copolymer. ! 5. The fiber according to claim 4, characterized in that the hydrophilic polymer or copolymer is selected from the group consisting of polyglycol ester, polyethoxylated amide, ethylene vinyl acetate with a vinyl acetate content of at least 30 wt.%, A copolymer of ethylene and acrylic acid, polyethylene glycolaluryl simple