Glass strand, glass roving, and method for manufacturing same
AssigneeNippon Electric Glass Co., Ltd.
InventorsShinji Nishibori, Jiro Abe
Life of this patent
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Abstract
Provided is a glass strand that, when mixed with mortar, is less likely to decrease the fluidity of the mortar and can 5 effectively increase the mechanical strength of a cementitious material. A glass strand includes: a plurality of glass filaments containing 12% by mass or more ZrO2 and 10% by mass or more R2O (where R represents at least one selected from Li, Na, and K); and a coating covering surfaces of the glass filaments, 10 wherein the coating contains polyvinyl acetate resin and polyether-based urethane resin, and wherein a content of the polyether-based urethane resin in the coating is, in solid content ratio, not less than 10% by mass and not more than 90% by mass.
Claims12
1-9. (canceled)
A glass-fiber reinforced concrete comprising a glass strand including:
- a plurality of glass filaments comprising at least 12% by mass ZrO2 and at least 10% by mass R2O (where R represents at least one selected from Li, Na, and K);
- and
- a coating covering surfaces of the glass filaments,
- wherein the coating comprises a polyvinyl acetate resin and a polyether-based urethane resin,
- wherein a content of the polyether-based urethane resin in the coating is, in solid content ratio, not less than 26% by mass and not more than 90% by mass, and
- wherein an isocyanate component constituting the polyether-based urethane resin is not a blocked isocyanate.
Dependencies are inferred from the claim text.