A composite structure comprising a substantially planar portion and a border arranged on the border of the substantially planar portion. A first linking zone arranged at one end of the border along a first axis and able to accommodate a first metal insert and a second linking zone arranged at another end of the border along the first axis and able to accommodate a second metal insert symmetrical to the first metal insert. An insert comprises a substantially planar base arranged perpendicular to the first axis and comprising, substantially at a center of the substantially planar base, a piercing. A first substantially planar wing is arranged perpendicular to the substantially planar base and a second substantially planar wing arranged perpendicular to the substantially planar base and the first substantially planar wing.

A composite structure comprising a substantially planar portion and a border arranged on the border of the substantially planar portion. A first linking zone arranged at one end of the border along a first axis and able to accommodate a first metal insert and a second linking zone arranged at another end of the border along the first axis and able to accommodate a second metal insert symmetrical to the first metal insert. An insert comprises a substantially planar base arranged perpendicular to the first axis and comprising, substantially at a center of the substantially planar base, a piercing. A first substantially planar wing is arranged perpendicular to the substantially planar base and a second substantially planar wing arranged perpendicular to the substantially planar base and the first substantially planar wing.

The invention relates to fiber sheets, to structures comprising the fiber sheets and to the use of the sheets. The invention further relates to biodegradable and/or recyclable products comprising the fiber sheets, useful in replacing non-biodegradable products.

An electric generator 1 includes a shaft 3a (metal rotating body), a ball bearing 4 (metal holding body) configured to hold the shaft 3a, and a resin spacer 5 (resin member) used together with these components. A resin part included in the spacer 5 includes reinforcement fibers F pointing in random directions in a plane orthogonal to the axial direction of the shaft 3a. The linear expansion coefficient of the resin part in a direction orthogonal to the axial direction is the same as the linear expansion coefficient of a metal part included in the shaft 3a or the ball bearing 4. Accordingly, the resin member that achieves a dimensional stability can be provided.

A continuous fabric for use in forming a repair liner for reinforcing a pipe. The fabric includes a top layer and one or more bottom layers. The width of the top layer is less than the width of the continuous fabric and the density of the top layer is less than the density of at least one of the at least one or more bottom layers. The top layer may serve as a guide for winding the fabric in an overlapping pattern about a mandrel so that the essentially only the top layer is visible in the fabric winding.

A cation-exchange membrane including: layer (I) containing repeating units (A) each represented by formula (1) and repeating units (S) each containing a sulfonic acid-type ion-exchange group, wherein the mass proportion of repeating units (A) based on the total mass proportion of repeating units (A) and repeating units (S) being 100% by mass is 53% by mass or more and 70% by mass or less; and layer (II) containing a fluorine-containing polymer containing a carboxylic acid-type ion-exchange group and disposed on layer (I), wherein the water content of layer (I) is 26% or more and 35% or less:

CF.sub.2—CF.sub.2  (1)

In various embodiments, an improved flexible-composite material is described that comprises at least one scrim constructed from at least two unidirectional tape layers bonded together and at least one woven fabric, non-woven fabric, or membrane bonded to the scrim. In various embodiments, the unidirectional tape layers comprise a plurality of parallel fiber bundles comprising monofilaments within an adhesive resin. In various embodiments, the fiber bundles are separated by gaps that can be filled in by adhesive or non-adhesive resin.

In various embodiments, an improved flexible-composite material is described that comprises at least one scrim constructed from at least two unidirectional tape layers bonded together and at least one woven fabric, non-woven fabric, or membrane bonded to the scrim. In various embodiments, the unidirectional tape layers comprise a plurality of parallel fiber bundles comprising monofilaments within an adhesive resin. In various embodiments, the fiber bundles are separated by gaps that can be filled in by adhesive or non-adhesive resin.

A fiber-reinforced resin hollow body includes an axial-direction fiber layer containing reinforcing fibers aligned parallel to an axial direction of the hollow body, and a non-axial-direction fiber layer provided on top of at least one of an internal and an external side of the axial-direction fiber layer, and containing reinforcing fibers oriented in a direction different from a direction in which the reinforcing fibers contained in the axial-direction fiber layer are aligned. The non-axial-direction fiber layer has end portions in a peripheral direction of the hollow body, the end portions overlapping each other.

A fiber-reinforced resin hollow body includes an axial-direction fiber layer containing reinforcing fibers aligned parallel to an axial direction of the hollow body, and a non-axial-direction fiber layer provided on top of at least one of an internal and an external side of the axial-direction fiber layer, and containing reinforcing fibers oriented in a direction different from a direction in which the reinforcing fibers contained in the axial-direction fiber layer are aligned. The non-axial-direction fiber layer has end portions in a peripheral direction of the hollow body, the end portions overlapping each other.