A reinforcing sheet including one or more layers of a reinforcing material, and a thermosetting adhesive associated with the reinforcing material, wherein the thermosetting adhesive includes a curing agent, and an epoxy-modified dimerized fatty acid combined with an epoxy terminated polyurethane interpenetrating network.

A glass filler of the present invention includes: a glass substrate; and a coating film including a surface treatment agent, the coating film covering at least a portion of a surface of the glass substrate. The glass substrate is a glass fiber having a flat cross-sectional shape. For the glass substrate, when a length corresponding to a minor axis of the flat cross-section of the glass fiber is represented by L1, a length corresponding to a major axis of the flat cross-section of the glass fiber is represented by L2, and a length corresponding to a fiber length of the glass fiber is represented by L3, a ratio of an average of L2 to an average of L1, (average of L2)/(average of L1), is 1.5 or more and 8 or less, the average of L1 is 1.0 μm or more and 10 μm or less, and an average of L3 is 80 μm or more and 160 μm or less. The surface treatment agent includes a silane coupling agent. A proportion of the coating film in the glass filler is 0.05 mass % or more and 2.5 mass % or less.

A glass filler of the present invention includes: a glass substrate; and a coating film including a surface treatment agent, the coating film covering at least a portion of a surface of the glass substrate. The glass substrate is a glass fiber having a flat cross-sectional shape. For the glass substrate, when a length corresponding to a minor axis of the flat cross-section of the glass fiber is represented by L1, a length corresponding to a major axis of the flat cross-section of the glass fiber is represented by L2, and a length corresponding to a fiber length of the glass fiber is represented by L3, a ratio of an average of L2 to an average of L1, (average of L2)/(average of L1), is 1.5 or more and 8 or less, the average of L1 is 1.0 μm or more and 10 μm or less, and an average of L3 is 80 μm or more and 160 μm or less. The surface treatment agent includes a silane coupling agent. A proportion of the coating film in the glass filler is 0.05 mass % or more and 2.5 mass % or less.

Provided is a method for producing a glass direct roving that has excellent workability and can effectively increase the mechanical strength of a composite material obtained by combination with resin. A method for producing a glass direct roving 10 formed by directly winding up a bundle of glass filaments includes the steps of: applying a sizing agent containing an epoxy resin having an epoxy equivalent of 180 to 240 to surfaces of a plurality of glass filaments to bundle the plurality of glass filaments; winding up a bundle obtained by bundling the plurality of glass filaments, thus making a wound package; and thermally drying the sizing agent at a temperature of 135° C. to 155° C. to form a coating on the surfaces of the glass filaments.

Provided is a method for producing a glass direct roving that has excellent workability and can effectively increase the mechanical strength of a composite material obtained by combination with resin. A method for producing a glass direct roving 10 formed by directly winding up a bundle of glass filaments includes the steps of: applying a sizing agent containing an epoxy resin having an epoxy equivalent of 180 to 240 to surfaces of a plurality of glass filaments to bundle the plurality of glass filaments; winding up a bundle obtained by bundling the plurality of glass filaments, thus making a wound package; and thermally drying the sizing agent at a temperature of 135° C. to 155° C. to form a coating on the surfaces of the glass filaments.

A substrate includes a fabric-like member. First inorganic fillers exist on a surface of the fabric-like member.

The invention is directed to an aqueous binder composition for mineral fibers.

The invention is directed to an aqueous binder composition for mineral fibers.

The invention relates to an uncured thermal and/or sound insulation product, based on mineral wool, advantageously on glass wool, that is in the form of a ply comprising a mineral wool layer sized by at least one binder, said sized layer having: a surface density, or basis weight, of less than or equal to 350 g/m.sup.2, preferably less than or equal to 300 g/m.sup.2, or less than or equal to 250 g/m.sup.2, and, optionally, greater than or equal to 200 g/m.sup.2, a micronaire of at most 3 under 5 grams, preferably of at most 15 l/min, better still of at most 12 l/min, and of at least 9 l/min, and the ply having a thickness of greater than 10 mm, or greater than or equal to 15 mm, or even greater than or equal to 25 mm. The invention makes it possible to propose a thermal and/or sound insulation product that is lighter while retaining satisfactory thermal and/or sound insulation properties and a good mechanical strength.

The invention relates to an uncured thermal and/or sound insulation product, based on mineral wool, advantageously on glass wool, that is in the form of a ply comprising a mineral wool layer sized by at least one binder, said sized layer having: a surface density, or basis weight, of less than or equal to 350 g/m.sup.2, preferably less than or equal to 300 g/m.sup.2, or less than or equal to 250 g/m.sup.2, and, optionally, greater than or equal to 200 g/m.sup.2, a micronaire of at most 3 under 5 grams, preferably of at most 15 l/min, better still of at most 12 l/min, and of at least 9 l/min, and the ply having a thickness of greater than 10 mm, or greater than or equal to 15 mm, or even greater than or equal to 25 mm. The invention makes it possible to propose a thermal and/or sound insulation product that is lighter while retaining satisfactory thermal and/or sound insulation properties and a good mechanical strength.