A kind of lightweight high-strength inflatable membrane material and preparation method thereof

Abstract

The invention discloses a lightweight high-strength air-filled membrane structure material and its preparation. The inflatable membrane material is a material with high gas resistance, high strength and low surface density, which is compounded by double-sided casting of the load-bearing layer, welding barrier layer and scrape-coated weather-resistant layer. The weather-resistant layer of the air-filled membrane material has self-cleaning properties, corrosion resistance, mildew resistance and weather resistance. The material of the welding barrier layer is polyether TPU, the casting thickness is 0.10-0.11mm, and the coating amount of TPU single layer is 120-130g / m 2 . The coating material of the weather-resistant layer is polyvinylidene fluoride containing 20-28% by weight, the thickness of the weather-resistant layer is 5-10 μm, and the roller coating amount of the coating material is 5-10g / m 2 . The preparation process of the present invention adopts a double-sided cast TPU film process and then coats the surface with a high-thickness-resistant PVDF layer. The preparation process is simple, and good lamination and merging between films and between films and cloth can be realized. The membrane material produced is light, high-strength, and has high gas barrier properties. Under the same strength, the weight is more than double that of other membrane materials, which can better improve the design flexibility of the membrane structure and resist wind, rain, snow and other threats. ability to weather.

Description

technical field [0001] The invention belongs to building-type inflatable materials, in particular to a light-weight high-strength inflatable film material and a preparation method thereof. Background technique [0002] Inflatable membrane material is a high-performance material with air and water resistance and certain strength. It is mainly used in the construction industry, mobile hangars, boat garages, tents and inflatable boats and other aquatic products. Most of the building membrane materials in the prior art are pasty polyvinyl chloride (PVC) resin with a certain formula and scraped on polyester or nylon fiber cloth, which has heavy weight, poor gas and moisture resistance, friction resistance and corrosion resistance; However, the architectural membrane materials with better performance, PTFE+glass fiber fabric and ETFE air pillow membrane materials, are expensive and heavy. These existing architectural membrane materials cannot meet the increasing performance requir...

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Problems solved by technology

Most of the building membrane materials in the prior art are pasty polyvinyl chloride (PVC) resin with a certain formula and scraped on polyester or nylon fiber cloth, which has heavy weight, poor gas and moisture resistance, friction resistance and corrosion resistance; However, the architectural membrane materials with better performance, PTFE+glass fiber fabric and ETFE air pillow membrane materials, are expensive and heavy. These existing architectural membrane materials cannot meet the increasing performance requirements and quantitative requirements for membrane materials, especially in When making a large-span movable architectural membrane structure, various mechanical analyzes and structural calculations are required. The requirements for the self-weight of the material are very high. The greater the self-weight of the material, the smaller the span that can be designed, and the ability to withstand wind, rain and snow. The lower it is, even in the face of the situation that it is difficult to charge

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