초록 ▼

A reinforcing lamina sheet and a process of making a reinforcing sheet for use in a glue laminated beam. The reinforcing lamina sheet increases the compressive and/or tensile strength of the glue laminate beam. The lamina sheet is formed from unidirectionally oriented reinforcing filaments, preferab

A reinforcing lamina sheet and a process of making a reinforcing sheet for use in a glue laminated beam. The reinforcing lamina sheet increases the compressive and/or tensile strength of the glue laminate beam. The lamina sheet is formed from unidirectionally oriented reinforcing filaments, preferably aramid filaments in an epoxy resin, and is cured in a curved configuration. The resulting lamina sheet includes filaments which are uniformly tensioned and, therefore, when a load is applied to the glue laminate beam having the reinforcing lamina sheet, the fibers receive the load substantially simultaneously. The process of forming the lamina sheet includes drawing reinforcement yarns through a resin bath to form a resin impregnated substantially planar yarn band, contacting one side of the resulting impregnated band with a curved heated surface to promote partial curing of at least the contacting surface of the band, and further applying heat to at least the opposite side of the partially cured band.

대표청구항 ▼

1. A reinforcing lamina sheet for improving the tensile or compressive loading of the wood members in glue laminated articles comprising:a substantially planar band defined at least by a first set of substantially unidirectionally oriented filaments wherein said filaments are aligned under tension,

1. A reinforcing lamina sheet for improving the tensile or compressive loading of the wood members in glue laminated articles comprising:a substantially planar band defined at least by a first set of substantially unidirectionally oriented filaments wherein said filaments are aligned under tension, a resin matrix filling the interstices between the filaments, wherein said matrix is at least partially cured so that the resin matrix and filaments have a curved configuration along the lengthwise direction of the filaments, and wherein the sheet has opposite first and second outer surfaces at least one of which has fractures in said matrix caused by bending the sheet after said partial curing in a direction opposite to the curvature of said curved configuration.