초록 ▼

The invention relates to a laminate composed of two, three, four or more aluminum-containing metal sheets. The metal sheets, which may for instance be of an aluminum alloy, are bonded together by means of adhesive layers. In the adhesive layers, which are of a thermohardening material, there are emb

The invention relates to a laminate composed of two, three, four or more aluminum-containing metal sheets. The metal sheets, which may for instance be of an aluminum alloy, are bonded together by means of adhesive layers. In the adhesive layers, which are of a thermohardening material, there are embedded poly-paraphenylene terephthalamide threads. These threads are provided in the form of yarns made up of endless filaments and lie in a practically straight line in the adhesive which substantially consists of a thermohardening material. The adhesive layers contain the threads in an amount of 20 to 80% by weight.

대표청구항 ▼

A fiber-reinforced laminate adapted for use as a structural component of an aircraft, comprising: at least two sheets of an aluminum alloy, each of said sheets having a thickness of less than 1 mm and a tensile strength of greater than 350 N/mm2; an adhesive layer located between each adjacent pair

A fiber-reinforced laminate adapted for use as a structural component of an aircraft, comprising: at least two sheets of an aluminum alloy, each of said sheets having a thickness of less than 1 mm and a tensile strength of greater than 350 N/mm2; an adhesive layer located between each adjacent pair of said sheets, said adhesive layer comprising a thermohardening material disposed between the sheets to bond an adjacent pair of the sheets together; aromatic polyamide fibers disposed in each said adhesive layer to reinforce the laminate, said fibers comprising polyparaphenylene terephthalamide yarns made up of endless filaments formed from a material having a modulus of elasticity in the range of 5×104 to 25×104 N/mm2 and an elongation at breakage of at least 2%, said yarns being disposed in substantially straight parallel lines in the adhesive layer and being present in an amount of 20 to 80% by weight based on the combined weight of the thermohardening material and the yarns, the thickness of each of the sheets being greater than the thickness of each said adhesive layer containing said fibers.