An optical fiber includes an optical transmission medium having a core and a cladding, a primary resin layer disposed in contact with the optical transmission medium to coat the optical transmission medium, and a secondary resin layer coating the primary resin layer, wherein a Young's modulus of the primary resin layer is 0.5 MPa or less at 23 C., and the primary resin layer comprises a cured product of an ultraviolet light curable resin composition containing a urethane (meth)acrylate oligomer, a monomer, a photopolymerization initiator and a -diketone compound, and tin.

An apparatus for manufacturing an optical fiber, including a drawing portion, a coating portion, and a curing portion; wherein a direction changer which changes a direction of the bare optical fiber is disposed in any position from the drawing portion to the coating portion, the direction changer includes a guide groove which guides the bare optical fiber, a blowout port of a fluid which floats the bare optical fiber wired along the guide groove is formed along the guide groove in the guide groove, and an average flow rate or a highest flow rate of the fluid in an inlet wire portion of the bare optical fiber to the guide groove, and an outlet wire portion from the guide groove is faster than a lowest flow rate of the fluid in an intermediate portion between the inlet wire portion and the outlet wire portion in the blowout port.

A screen includes a mesh substrate having an openness of greater than 30% when viewed at 0 incidence, the mesh substrate having a first major surface and a second major surface, the first major surface including a first coating, the first major surface having a first reflectance value, wherein the first reflectance value has an average value of greater than about 10% as measured by an EN410 standard and a diffuse reflection profile at all viewing angles from 89 to 89, excluding an angle of direct illumination as measured by a scattering distribution function technique using a Goniometer, wherein the diffuse reflection profile provides a reduction in view through the mesh substrate when viewed from 89 to 89.

A screen includes a mesh substrate having an openness of greater than 30% when viewed at 0 incidence, the mesh substrate having a first major surface and a second major surface, the first major surface including a first coating, the first major surface having a first reflectance value, wherein the first reflectance value has an average value of greater than about 10% as measured by an EN410 standard and a diffuse reflection profile at all viewing angles from 89 to 89, excluding an angle of direct illumination as measured by a scattering distribution function technique using a Goniometer, wherein the diffuse reflection profile provides a reduction in view through the mesh substrate when viewed from 89 to 89.

Provided is a glass strand that, when mixed with mortar, is less likely to decrease the fluidity of the mortar and can effectively increase the mechanical strength of a cementitious material. A glass strand includes: a plurality of glass filaments containing 12% by mass or more ZrO.sub.2 and 10% by mass or more R.sub.2O (where R represents at least one selected from Li, Na, and K); and a coating covering surfaces of the glass filaments, 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.

The present invention provides an electromagnetic shielding metal-coated glass fiber filler to be used as a composite with resin, the glass fiber filler including: glass fiber; and a metal coating in the longitudinal direction of the glass fiber, wherein the metal coating is made of an alloy containing a first metal consisting of zinc and a second metal consisting of a metal having a lower oxidation-reduction potential than zinc (i.e., being more easily oxidized than zinc), the second metal is at least one selected from the group consisting of barium, strontium, calcium, magnesium, beryllium, aluminum, titanium, zirconium, manganese, and tantalum, and the alloy contains the first metal in an amount of 50% by mass or more.

The invention relates to mats of inorganic fibres, in particular glass mats, with a special coating and decorative coatings, manufactured therefrom, in floor, ceiling and wall coverings, and also a method for their manufacture.

The invention relates to mats of inorganic fibres, in particular glass mats, with a special coating and decorative coatings, manufactured therefrom, in floor, ceiling and wall coverings, and also a method for their manufacture.

A curable formaldehyde-free binding composition for use with fiberglass is provided. Such curable composition comprises an aldehyde or ketone and an amine salt of an inorganic acid. The composition when applied to fiberglass is cured to form a water-insoluble binder which exhibits good adhesion to glass. In a preferred embodiment the composition when applied to fiberglass provides a sufficient blackness required in facer products.

The invention relates to a device for processing optical fibers, comprising: a pair of pulleys (1, 2) arranged to receive in a space between them a first optical fiber element (4), and a drive mechanism. In order to obtain a device capable of efficiently and reliably processing optical fibers the first pulley (1) in the pair of pulleys comprises a circumferential first groove (5) in a circumferential contact surface (6) for receiving the first optical fiber element (4), the first groove (5) being shaped to accommodate the first optical fiber element (4) such that less than half of the cross sectional surface area of the first optical fiber element (4) protrudes out of the first groove (5), and a second pulley (2) in the pair of pulleys comprises a circumferential contact surface (7) contacting a surface of the first optical fiber element (4).