| 摘要 |
<p>944,519. Storing liquefied gases. SOC. L'AIR LIQUIDE SOC. ANON. POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES G. CLAUDE. April 19, 1961 [April 27, 1960; Dec. 28, 1960], No. 14155/61. Heading F4P. Thermal insulation for use in receptacles for liquefied gases comprises substantially parallel reflecting screens separated by at least one fabric layer formed of fibres having low thermal conductivity, the warp and weft of the fabric consisting of threads formed of twisted fibres, the pitch of which is substantially different from the mesh of the fabric or from an integer submultiple thereof. As described with reference to Figs. 1 and 3, two screens 1 are made of polished aluminium and are separated by a layer of glass fibre fabric composed of weft threads 3 and warp threads 4, each comprising about forty fibres about 3 microns in diameter forming a mesh of 0.25 mm. The screens 1 are 8 microns thick and have double undulations, the larger of the latter 7, 8 having a wavelength of 1 cm. and an amplitude of 5 mm. and the smaller 9, 10 a wavelength of 0.64 mm. and an amplitude of 32 microns. In place of the smaller undulations the screens may have bosses extending from both sides thereof or may have folds therein and the bosses or folds may be perforated so that a high vacuum may be obtained between the screens. In modifications, Figs. 6 and 7 (not shown), a layer of fabric is disposed midway between two screens and within felt made of glass fibres or two layers of fabric are disposed in respective contact with the opposed faces of two screens with a layer of felt interposed between the layers of fabric.</p> |
