| 摘要 |
PCT No. PCT/SE96/00187 Sec. 371 Date Aug. 13, 1997 Sec. 102(e) Date Aug. 13, 1997 PCT Filed Feb. 13, 1996 PCT Pub. No. WO96/25655 PCT Pub. Date Aug. 22, 1996The invention relates to a device for obtaining, in the manufacture of a high-strength composite, an indication the reinforcement layer of the composite has been wetted throughout by the matrix material of the composite. The reinforcement layer is of the type which mainly consists of fibers or fiber bundles which do not become translucent or transparent when wetted by the matrix material, such as carbon or aramide fibers or fiber bundles. The matrix material of thermosetting plastic is applied in a liquid state in the manufacture according to, for instance, the technique of hand lay-up. The reinforcement layer includes indicating fibers which become translucent or transparent when wetted by the matrix material. A good indication is obtained if the indicating fibers have such properties that they become translucent only when the adjoining reinforcing material has been completely wetted throughout. Preferably the indicating fibres are uniformly distributed across the reinforcement layer and in an amount that does not affect the properties of the composite significantly. |
