High-strength ultrathin heat-insulation paper, preparation method and application thereof

Abstract

The invention discloses high-strength ultrathin heat-insulation paper, a preparation method and application thereof. The low-temperature heat-insulation paper is prepared by mixing micro glass wool and alkali-free short cut fiber according to a ratio of 100:2-3. The preparation method of the high-strength ultrathin heat-insulation paper comprises: mixing micro glass wool and alkali-free short cut fiber according to a ratio of 100:2-3, and then performing defibering, pulp preparing, pulp storage, slag removing, pulp supply, beater-addition, dewatering, negative-pressure drying and rolling. The finished product has the thickness of 0.04-0.06 mm and the gram weight of 9-10 m<2>, and is relatively high in tensile strength. Also the finished product is good in heat insulation performance, small in outgassing rate in vacuum, relatively reliable in performances and relatively environment-friendly, is applicable to deep-cold liquid storage and transportation containers, low-temperature pressure containers, and vacuum multi-layer heat-insulation structures of matched pipelines, and is relatively wide in application.

Description

technical field [0001] The invention relates to a high-strength ultra-thin heat-insulating paper, and also relates to a manufacturing method and application of the high-strength ultra-thin heat-insulating paper. Background technique [0002] At present, the cryogenic liquid storage and transportation containers and their supporting pipelines generally adopt two categories: ordinary packaging insulation and vacuum insulation. Vacuum insulation is divided into: high vacuum insulation, vacuum fiber (powder insulation), high vacuum multi-layer insulation, high vacuum multi-screen insulation, multi-layer insulation, etc. Among them, vacuum fiber (powder insulation) is commonly used, and vacuum fiber insulation is divided into Organic fibers and inorganic fibers. The organic fiber adopts polyester fiber, which is resistant to high temperature difference, easy to shrink, and burns carbon around the area. Glass fiber cloth is used for inorganic fiber, and there are also disadvantag...

AI Technical Summary

Problems solved by technology

The organic fiber adopts polyester fiber, which is resistant to high temperature difference, easy to shrink, and burns carbon around the area. Glass fiber cloth is used for inorganic fiber, and there are also disadvantages such as cloth thickness > 0.1mm, thick fiber and large evaporation under vacuum, etc., powder insulation material exists Due to the inherent defects of easy flow and combustion heat of the material, its field of application is limited and its service life is short

According to literature and relevant information reports, the more advanced common thermal insulation paper in China can only barely produce ultra-fine glass fiber thermal insulation paper with a thickness > 0.06mm and a gram weight > 10m2, while for thermal insulation paper that requires thinner and lower basis weight, It is difficult to control, it is difficult to roll, the paper surface is wrinkled seriously, the uniformity cannot be guaranteed, and the tensile strength cannot meet the user's requirements.

Due to the limited gap between the inner and outer layers of low-temperature pressure vessels, and the installation requirement of no less than 50 layers of winding insulating paper, the extension and development of low-temperature pressure vessels are restricted.

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