PTFE film is made of polytetrafluoroethylene dispersion resin, premixed, extruded, calendered, bidirectional stretching and other special processes of the production of microporous film, divided into clothing film, Puwei waterproof film, filter film, purification film.
4. The cross section of the membrane is a network structure, and there are very complex changes in the three-dimensional structure of the holes, such as network connectivity, hole inlaid sleeve, and channel bending, etc. There may be a number of microholes to form a channel, or a microhole may be connected with a number of channels.
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Introduction and microstructure of PTFE membrane
PTFE film is made of polytetrafluoroethylene (PTFE) as raw material by special process, calendering, extrusion, bidirectional stretching and other methods of microporous film.PTFE membrane can be divided into clothing membrane, air filtration membrane, air purification membrane.PTFE film has fibrous microporous structure, porosity is more than 85%, there are 1.4 billion micropores per square centimeter, pore size range 0.02μm -- 15μm.
The main structure
1. The surface morphology of PTFE microporous film is a spider mesh microporous structure.Pore is formed between the microfibers, and the direction of microfibers is basically parallel to the stretching direction.The junction of the fiber bundle is a node, which is formed by the entanglement of many microfibers.
2.PTFE membrane is an asymmetrical membrane, and there are differences in micropore size between the positive and negative sides of the membrane.
3. The cross section micropore size of the membrane is larger than that of the surface micropore size, and the vertical and horizontal micropore size is also different, and the longitudinal micropore size is larger than the transverse micropore size.
Autodesk extends invitation to join financial results conference call and digital investor day
**Autodesk to Host Q4 Fiscal Year 2023 Financial Results Conference Call**
SAN FRANCISCO, February 2, 2023 — Autodesk, Inc. (NASDAQ: ADSK), a global leader in design and manufacturing software solutions, has announced plans to broadcast its fourth quarter fiscal year 2023 financial results conference call live online. The event is scheduled for Thursday, February 23, 2023, starting at 2 p.m. Pacific Time.
Interested parties can join the live webcast directly through the company's investor relations page at [autodesk.com/investors](http://autodesk.com/investors). Additionally, an audio replay of the webcast will be available shortly after the conclusion of the call, beginning at 5 p.m. PT, and can also be accessed on the same webpage.
In addition to the financial results call, Autodesk is excited to announce its upcoming Digital Investor Day, which will take place on Wednesday, March 22, 2023, at 8 a.m. Pacific Time. Further details regarding this event will be posted on the official investor relations site at [autodesk.com/investors](http://autodesk.com/investors).
At Autodesk, we're committed to transforming the way the world designs and builds. Our innovative software solutions span industries such as architecture, engineering, construction, product design, manufacturing, and media and entertainment. Whether it's creating sustainable buildings, developing cutting-edge products, or producing award-winning films, Autodesk empowers creators around the globe to tackle challenges both large and small. We believe in harnessing technology to craft a better future for everyone.
For those who wish to learn more about our mission, products, and vision, please visit our website at [autodesk.com](http://autodesk.com) or connect with us on social media via @autodesk.
**About Autodesk**
Autodesk, headquartered in San Rafael, California, is a renowned name in digital design tools and technologies. Our commitment to innovation extends across various sectors, including architecture, engineering, construction, manufacturing, and media. As a global company, Autodesk is dedicated to fostering creativity and sustainability, ensuring that our solutions contribute positively to society and the environment.
**Trademark Information**
Autodesk is a registered trademark of Autodesk, Inc., and may be registered in other jurisdictions worldwide. Other brand names, product names, and trademarks mentioned herein belong to their respective owners. While every effort has been made to ensure accuracy, Autodesk reserves the right to modify product offerings, specifications, and pricing without prior notice. Any typographical or graphical errors are unintentional and should be disregarded.
**Copyright Notice**
© 2023 Autodesk, Inc. All rights reserved.
**SOURCE**
Autodesk, Inc.
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