An optical fiber comprising: a glass fiber including a core and a cladding; and a coating layer coating an outer periphery of the glass fiber; wherein the coating layer includes a primary coating layer and a secondary coating layer, and a hardness at a depth of 200 nm from a surface of the secondary coating layer, H.sub.IT-200 nm, is 0.02 to 0.20 GPa as measured with a nano indenter.

An optical fiber comprising: a glass fiber including a core and a cladding; and a coating layer coating an outer periphery of the glass fiber; wherein the coating layer includes a primary coating layer and a secondary coating layer, and a hardness at a depth of 200 nm from a surface of the secondary coating layer, H.sub.IT-200 nm, is 0.02 to 0.20 GPa as measured with a nano indenter.

A semiconductor nanocrystal film according to an exemplary embodiment of the present invention includes a glass cloth including a glass fiber having a composition of E glass, S glass, T glass, or E-CR glass, a polymer matrix impregnated in the glass cloth, and a semiconductor nanocrystal dispersed in the polymer matrix, and thus may exhibit uniform light emitting distribution, a low coefficient of thermal expansion, and excellent mechanical strength.

A semiconductor nanocrystal film according to an exemplary embodiment of the present invention includes a glass cloth including a glass fiber having a composition of E glass, S glass, T glass, or E-CR glass, a polymer matrix impregnated in the glass cloth, and a semiconductor nanocrystal dispersed in the polymer matrix, and thus may exhibit uniform light emitting distribution, a low coefficient of thermal expansion, and excellent mechanical strength.

The present invention relates to amino acid-containing sizing compositions for glass fibers, to glass fibers at least partially coated with such sizing compositions, to a variety of fiber glass products at least partially coated with such sizing compositions, and to composite materials comprising glass fibers at least partially coated with such sizing compositions. In one non-limiting embodiments, a sizing composition for glass fibers comprises an amino acid, a protein, or a hydrolyzed protein. A sizing composition for glass fibers, in another non-limiting embodiment, comprises an amino acid, a protein, or a hydrolyzed protein, at least one film-former, and at least one silane.

The present invention relates to amino acid-containing sizing compositions for glass fibers, to glass fibers at least partially coated with such sizing compositions, to a variety of fiber glass products at least partially coated with such sizing compositions, and to composite materials comprising glass fibers at least partially coated with such sizing compositions. In one non-limiting embodiments, a sizing composition for glass fibers comprises an amino acid, a protein, or a hydrolyzed protein. A sizing composition for glass fibers, in another non-limiting embodiment, comprises an amino acid, a protein, or a hydrolyzed protein, at least one film-former, and at least one silane.

An aqueous post-coat composition for coating a fiber tow is disclosed. The aqueous composition includes about 0.5 to about 5.0 wt. % solids of a film former and about 0.05 to about 2.0 wt. % solids of a compatibilizer. The compatibilizer may be at least one of a silicone-based coupling agent, a titanate coupling agent, a zirconate coupling agent, gluteric dialdehyde, and a quaternary ammonium antistatic agent.

An optical fiber comprises a glass fiber including a core and a cladding, and a coating resin layer for coating the glass fiber; the coating resin layer has a primary resin layer in contact with the glass fiber for coating the glass fiber, and a secondary resin layer for coating the primary resin layer; the primary resin layer includes a cured product of a first resin composition containing a silicone (meth)acrylate and a photopolymerization initiator; the secondary resin layer includes a cured product of a second resin composition containing a urethane (meth)acrylate and a photopolymerization initiator; and the amount of tin contained in the coating resin layer is 150 ppm or less in a mass ratio.

An optical fiber comprises a glass fiber including a core and a cladding, and a coating resin layer for coating the glass fiber; the coating resin layer has a primary resin layer in contact with the glass fiber for coating the glass fiber, and a secondary resin layer for coating the primary resin layer; the primary resin layer includes a cured product of a first resin composition containing a silicone (meth)acrylate and a photopolymerization initiator; the secondary resin layer includes a cured product of a second resin composition containing a urethane (meth)acrylate and a photopolymerization initiator; and the amount of tin contained in the coating resin layer is 150 ppm or less in a mass ratio.

An inorganic fiber sizing agent is disclosed that contains a vinyl ester compound, a surfactant, and a fatty acid ester. Also disclosed is an inorganic fiber having the inorganic fiber sizing agent attached thereto.