Airship sheath material and preparation method thereof

A skin material and airship technology, applied in the field of airship skin materials and their preparation, can solve the problems of poor water resistance and no specific gravity advantage of barrier materials, and achieve good overall processing performance, improved rubbing resistance, and improved barrier effect. Effect

Inactive Publication Date: 2012-04-18
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The third is ethylene polyvinyl alcohol-based high-barrier materials. The thickness of this material only needs to be about 1 μm to achieve a good barrier effect. The 1 μm barrier coating is coated on polyethylene film, and the helium permeability can reach 20mL / (m2 ·atm·24h), but because the barrier material has poor water resistance, it must be protected by a certain thickness of plastic film on both sides during processing. Usually, a 20μm polyethylene film or nylon film is used to co-extrude the three layers of the high barrier layer together. , so this material has no obvious specific gravity advantage

Method used

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  • Airship sheath material and preparation method thereof
  • Airship sheath material and preparation method thereof
  • Airship sheath material and preparation method thereof

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preparation example Construction

[0024] A kind of preparation method of airship skin material that the present invention proposes, such as figure 2 As shown, it specifically includes the following steps:

[0025] Step 1: Firstly, a 20-25 micron-thick glue layer and a 25-35 micron-thick anti-aging layer are sequentially coated on the front side (direct sunlight surface) of the fabric layer with a thickness of 100-150 microns.

[0026] The fabric layer is made of polyester, aramid or other high-strength fibers. The material of the adhesive layer is hot-melt polyurethane adhesive or coated polyurethane adhesive. The anti-aging layer contains 1-3% ZnO and 2.5-4% TiO 2 thermoplastic polyurethane.

[0027] Step 2: Coat the back of the fabric layer with a base layer with a thickness of 25-30 microns, and dry it above 80°C to form a smooth film on the surface. The material of the base layer is a thermoplastic polyurethane layer.

[0028] Step 3: adding polyvinyl alcohol (with a purity of 100%) to the purified di...

Embodiment 1

[0035] This embodiment provides a kind of airship skin material, and this skin material is made up of six-layer structure, is anti-aging layer, adhesive layer, fabric layer, base layer, high barrier layer and welding layer successively from top to bottom; The thickness of the anti-aging layer is shown in Table 1. The material of the anti-aging layer is 1% ZnO and 2.5% TiO 2 thermoplastic polyurethane with a thickness of 30 microns; the material of the adhesive layer is hot-melt polyurethane adhesive with a thickness of 25 microns; the material of the fabric layer is aramid fiber cloth with a thickness of 105 microns; the material of the base layer is thermoplastic polyurethane, The thickness is 30 microns; the material of the high barrier layer is SiO with a mass fraction of 1.5% and a particle size of 20-60nm 2 Nanoparticles of polyvinyl alcohol, 1 micron thick. The material of the welding layer is thermoplastic polyurethane with a thickness of 20 microns.

[0036] Table 1 ...

Embodiment 2

[0047] This embodiment provides a kind of airship skin material, and this skin material is made up of six-layer structure, is anti-aging layer, adhesive layer, fabric layer, base layer, high barrier layer and welding layer successively from top to bottom; Anti-aging The material of the layer is 3% ZnO and 4% TiO 2 thermoplastic polyurethane with a thickness of 25 microns; the material of the adhesive layer is hot-melt polyurethane adhesive or coated polyurethane adhesive with a thickness of 25 microns; the material of the fabric layer is polyester fiber with a thickness of 100 microns; the base layer The material is thermoplastic polyurethane with a thickness of 25 microns; the material of the high barrier layer is SiO with a mass fraction of 2.5% and a particle size of 40-70nm 2 Nanoparticles of polyvinyl alcohol with a thickness of 3 microns. The material of the welding layer is thermoplastic polyurethane with a thickness of 30 microns.

[0048] The invention provides a me...

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Abstract

The invention provides an airship sheath material and a preparation method thereof. The sheath material comprises successively an anti-aging layer, a glue-line, a fabric layer, a basal layer, a high barrier layer and a weld layer. A material of the anti-aging layer is a thermoplastic polyurethane containing ZnO with a mass fraction of 1-3% and TiO2 with a mass fraction of 2.5-4% and having a thickness of 25-35 mum; a material of the high barrier layer is polyvinyl alcohol containing SiO2 nano particles with a mass fraction of 1.5-2.5%, a particle size of 20-70nm and a thickness of 1-3 mum. a material of the weld layer is thermoplastic polyurethane with a thickness of 20-30 mum. The high barrier layer of the airship sheath material is added with nano particles to gain a substantially enhanced obstruction effect and a helium permeation of 5-20ml / (m<2>.atm.24h). The preparation technology of the invention is simple; a coating technology and a simple applying technology are employed to realize a high obstruction effect.

Description

technical field [0001] The invention belongs to the field of aerospace materials, and in particular relates to an airship skin material and a preparation method thereof. Background technique [0002] The skin material of the airship is the main structural material of the low-altitude soft airship, which plays the role of maintaining helium and providing buoyancy, and at the same time provides an installation platform for components. The main performance indicators of airship skin materials include strength, barrier properties, weather resistance, processability, etc. The better the barrier performance of the skin material, the smaller the helium leakage of the airship, which can prolong the flight time of the airship. [0003] The high-barrier functional layer of general-purpose airship skin materials has the following forms: one is polymer coatings, such as polyurethane coatings, etc. Polyurethane coatings have the characteristics of good weather resistance and excellent p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/12B64B1/58
Inventor 刘东旭吕明云马云鹏孟军辉张一胡杰杨永强
Owner BEIHANG UNIV
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