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Poly urethane (PU) or thermal receiver unit (TPU) film with anti-drag micro-groove structure for airship skin

A micro-groove and skin technology, applied in the field of airship skin materials, can solve the problems of poor weather resistance, poor heat insulation, large resistance, etc., and achieve the effects of prolonging the airtime, good shape retention, and small elastic recovery changes.

Inactive Publication Date: 2012-09-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problems of poor weather resistance, large resistance and poor heat insulation of the existing stratospheric airship skin, and provides a PU or TPU film with a drag-reducing micro-groove structure for the airship skin

Method used

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  • Poly urethane (PU) or thermal receiver unit (TPU) film with anti-drag micro-groove structure for airship skin
  • Poly urethane (PU) or thermal receiver unit (TPU) film with anti-drag micro-groove structure for airship skin
  • Poly urethane (PU) or thermal receiver unit (TPU) film with anti-drag micro-groove structure for airship skin

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specific Embodiment approach 1

[0075] Specific Embodiment 1: In this embodiment, the PU or TPU film with a drag-reducing micro-groove structure for the airship skin includes a "V"-shaped groove arranged on the surface, and the "V"-shaped groove is formed on the PU or TPU film. Alternate and transparent grooves are formed on the surface, the width s of each groove is 20-200 μm, and the depth h is 20-200 μm.

[0076] This embodiment provides a PU or TPU film with a drag-reducing micro-groove structure for airship skins. The micro-grooves are prepared by a hot embossing method. The hot embossing mechanism analysis of the film material in this embodiment is as follows:

[0077] Thermal embossing of film materials is based on thermal flow molding of polymers to achieve graphic replication. When the size of the template pattern is small and the periodicity is strong, the polymer is easy to transfer completely, and the template pattern can be well replicated on the polymer substrate; when the size of the template ...

specific Embodiment approach 2

[0083] Embodiment 2: This embodiment is different from Embodiment 1 today in that: the thickness of the PU or TPU film is 25-250 μm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0084] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the width s of each groove is 90-110 μm, and the depth h is 90-110 μm. Others are the same as in the first or second embodiment.

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Abstract

A poly urethane (PU) or thermal receiver unit (TPU) film with an anti-drag micro-groove structure for an airship skin relates to an airship skin material and solves the problems in the existing stratosphere airship skins of being poor in weather resistance, large in drag and poor in thermal insulation. The PU or TPU film with the anti-drag micro-groove structure for the airship skin comprises a V-shaped groove on the surface, and the V-shaped groove forms alternating and transparent grooves on the surface of the PU or TPU film. An Al layer or TiO2 protecting layer is further arranged on the surface of the PU or TPU film. The microgroove with high resolution and a high depth-to-width ratio structure is arranged on the surface of the film, the grooves are obvious and in order and are prominent in anti-drag effect, and the protecting layer on the surface of the film can reflect solar radiation, absorbs ultraviolet light, shields elemental oxygen and improves weather resistance. The PU or TPU film is applied to the airship skin material.

Description

technical field [0001] The present invention relates to airship skin materials. Background technique [0002] Near space can also be called near space or near space. At the same time, this altitude is also the area where the stratosphere is located, above the layer of natural phenomena such as wind, rain, thunder, and lightning, and belongs to the high security zone. After entering the 21st century, the value of the special field of near space has been paid more and more attention by countries all over the world, and various military powers have regarded it as a new field of military struggle in the 21st century. In recent years, the application research of near-space airship as a communication and navigation platform has attracted worldwide attention. In the process of developing near-space airships, the key technical issues involved are currently the focus of research by various countries. Since near-space airships are not low-altitude airships, many concepts of developm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64B1/58
Inventor 谭惠丰刘宇艳刘少柱王长国邢麒麟刘羽熙
Owner HARBIN INST OF TECH
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