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Preparation method of polyoxymethylene crude fiber for toughening concrete
The invention relates to a preparation method of a polyoxymethylene crude fiber for toughening concrete. The method comprises the following steps: (1) mixing polyoxymethylene resin, a modified nano filler, a water-soluble polymer pore-foaming agent and a high-performance fiber in a high-speed mixer, extruding and pelletizing, so as to obtain modified POM aggregates; and (2) spinning the modified POM aggregates in a twin-screw extruder, directly feeding to a cooling bath to cool and mold, washing in a hot water bath, removing a water-soluble polymer, carrying out hot stretching, carrying out secondary stretching after drying, carrying out heat setting, and finally cutting into staple fibers, so as to prepare polyoxymethylene crude fiber the surface of which has micropores, with the equivalent diameter being 0.1-1mm, the tensile strength being greater than or equal to 600MPa and the tensile modulus being greater than or equal to 6.5GPa. Nanoparticle-enhanced and fiber-enhanced synergistic reinforcing effects are adopted, so that the high-performance polyoxymethylene crude fiber is prepared by virtue of general crude fiber equipment.
Preparation method of polyoxymethylene crude fiber for toughening concrete
The invention relates to a preparation method of a polyoxymethylene crude fiber for toughening concrete. The method comprises the following steps: (1) mixing polyoxymethylene resin, a modified nano filler, a water-soluble polymer pore-foaming agent and a high-performance fiber in a high-speed mixer, extruding and pelletizing, so as to obtain modified POM aggregates; and (2) spinning the modified POM aggregates in a twin-screw extruder, directly feeding to a cooling bath to cool and mold, washing in a hot water bath, removing a water-soluble polymer, carrying out hot stretching, carrying out secondary stretching after drying, carrying out heat setting, and finally cutting into staple fibers, so as to prepare polyoxymethylene crude fiber the surface of which has micropores, with the equivalent diameter being 0.1-1mm, the tensile strength being greater than or equal to 600MPa and the tensile modulus being greater than or equal to 6.5GPa. Nanoparticle-enhanced and fiber-enhanced synergistic reinforcing effects are adopted, so that the high-performance polyoxymethylene crude fiber is prepared by virtue of general crude fiber equipment.
Preparation method of polyoxymethylene crude fiber for toughening concrete
LIU JIANZHONG (author) / LIU JIAPING (author) / XU DEGEN (author) / YANG ZHIQIAN (author) / LI LIN (author) / ZHANG AIMIN (author) / ZHOU TAO (author) / YE GUANGDOU (author) / LYU JIN (author) / ZHANG LIHUI (author)
2015-04-08
Patent
Electronic Resource
English
IPC:
D01F
Chemische Gesichtspunkte bei der Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
,
CHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
/
C04B
Kalk
,
LIME
/
C08K
Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe
,
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
/
C08L
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
,
Massen auf Basis makromolekularer Verbindungen
/
D01D
MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
,
Mechanische Verfahren oder Vorrichtungen für die Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
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