Hot-pressing preparation method for aluminum-coated TPU (thermoplastic polyurethane) film resistance reduction microgrooves for airship skin

A technology of micro-groove and thermal embossing, which is applied in the field of airship skin material preparation, can solve problems such as poor weather resistance, poor heat insulation, and high resistance, and achieve good coating adhesion, good shape retention, and elastic recovery The effect of small changes

Inactive Publication Date: 2014-09-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to solve the problems of poor weather resistance, large resistance and poor heat insulation of existing stratospheric airship skins, and provides a hot embossing preparation method for Al-plated TPU film drag-reducing micro-grooves for airship skins

Method used

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  • Hot-pressing preparation method for aluminum-coated TPU (thermoplastic polyurethane) film resistance reduction microgrooves for airship skin
  • Hot-pressing preparation method for aluminum-coated TPU (thermoplastic polyurethane) film resistance reduction microgrooves for airship skin
  • Hot-pressing preparation method for aluminum-coated TPU (thermoplastic polyurethane) film resistance reduction microgrooves for airship skin

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specific Embodiment approach 1

[0051] Specific Embodiment 1: In this embodiment, the hot embossing preparation method of Al-plated TPU film drag-reducing micro-grooves for airship skin is carried out according to the following steps:

[0052] 1. Use the ultra-precision micromachining machine tool system to process the Al template with a "V" groove structure on the surface. The "V" groove forms alternate transparent grooves on the surface of the Al template. Each groove The width s is 90-110 μm, and the depth h is 90-110 μm;

[0053] 2. Ultrasonic clean the Al template prepared in step 1 with acetone for 15-20 minutes, and after drying, apply three layers of film cleaning agent, then three layers of sealing agent, and finally three layers of water-based mold release agent , the coating time interval of each layer is 15-20min;

[0054] 3. Using vacuum evaporation technology, an aluminum film with a thickness of 90-110 μm is evaporated on the surface of the TPU film to be imprinted to obtain an Al-coated TPU ...

specific Embodiment approach 2

[0058] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the length of the template made of Al is 50-52 mm, the width is 50-52 mm, and the thickness is 5-8 mm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0059] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: in step 1, the width s of each groove is 95-105 μm, and the depth h is 95-105 μm. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to preparation methods for airship skin materials, in particular to a hot-pressing preparation method for aluminum-coated TPU (thermoplastic polyurethane) film resistance reduction microgrooves for an airship skin. The hot-pressing preparation method solves the problems of poor weather resistance, high resistance and poor heat insulation of skins. The preparation method includes: firstly, preparing an aluminum mould plate; secondly, cleaning the mould plate and coating release agent; thirdly, evaporating an aluminum film on the surface of a TPU film by the vacuum evaporation technique; and fourthly, pressing for 20-25 minutes under the pressure of 65-75N and at the temperature of 140-145 DEG C to obtain an aluminum-coated TPU film with resistance reduction microgrooves. By the preparation method, microgrooves which are high in resolution and aspect ratio are obtained, the aluminum layer on the surface of the film can reflect solar radiation to improve weather resistance, process equipment is simple, and cost is low. Further, the hot-pressing preparation method is used for preparation of resistance-reducing weather-resistant skin materials for near space airships.

Description

technical field [0001] The invention relates to a preparation method of an airship skin material. 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 co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/095B32B37/06B32B37/10B32B38/06B64C1/12
Inventor 刘宇艳谭惠丰刘少柱王长国刘羽熙马涛
Owner HARBIN INST OF TECH
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