PTFE (Teflon) coated glass cloth has become established as the highest quality architectural membrane for tensile structures. The material was developed by DuPont in the s and has been used for structures since the early s. The original 25 year design lifespan of the material has already been exceeded by the earliest structures, and present day expectations are for 30-50 year lifespans.
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PVC coated polyester had been used as an economical alternative to PTFE cloth, typically achieving savings of 50-70 per m2 on construction costs. The lifespan of PVC coated polyester is typically 15-20 years.
Each fabric is available in various strength ranges, and selection is primarily an engineering-based decision. The thicker fabrics have tensile strength of 150kN per metre, while the lighter grade fabrics have tensile strength of 75-100kN per meter. The heavier grade fabrics have light transmission rates of 9-12 %, while the lighter grade fabrics allow 14-16%
Thermal performance
The insulative properties of PTFE coated glass is similar to the performance of conventional glazing. The equates to a U value of aprox 4.0 5.0 for a single layer membrane, and 2 2.5 for a twin layered membrane. Twin layered membranes have a light transmission level of approximately 50% of a single skin structure.
Insulted sandwich systems have been developed by Architen to achieve very high levels of thermal performance. These equal the highest standards achieved by well insulated conventional construction, equating to U-value of 0.2
Solar Performance
The typical characteristics of single skin tensile fabric roofs to sunlight are approximately 75% reflection, 10% absorption and 15% transmission.
Fire Performance
All Teflon coated glass cloths are inherently non-flammable and achieve Class 1 in surface spread of flame testing and class 0 performance in BS476 pt6 Fire Propagation tests.
Life
PTFE is actively bleached by UV light, which had the effect of maintaining a bright white appearance in the long term. The Teflon coating provides a chemically inert layer which resists the build up of environmental pollution. The material had been extensively tested both in the laboratory and out in the field and no degradation or loss of strength is observed. The material does not become brittle or discolour over time. It is anticipated that the material has a life in excess of 30 years.
Acoustics
As lightweight material with limited mass, PTFE fabric roofs are acoustically relatively transparent, but provide a degree of absorption and noise attenuation. The inclusion of an insulted layer greatly enhances the acoustic attention of a tensile roof, particularly for mid to high frequency noise sources. This is particularly helpful for lessening the ringing reverberant in din that can affect courtyard and atrium environments.
Cleaning
PTFE coated glass roofs are extremely low in maintenance due to the cleaning action of rain on the Teflon outer layer. Typically, cleaning is recommended every 2-5 years, depending on the location of the structure and its exposure to environmental pollution. The fabric is sufficiently strong to support a mans weight on its surface, so cleaning simply requires the incorporation of man-safe systems to access the roof surface. Cleaning us usually by means of jet-washers, soft brushes and water with a mild detergent. PTFE roofs do not need to be cleaned internally.
Weight
Single skin PTFE roofs typically weigh 1.5kg per m2, and thermal sandwich roofs typically weigh 3.5kg per m2.
Membrane Panel size
Tensile membranes can be manufactured to virtually any size and shape up to m2 in a single panel. The membrane is made up from seam welded sections which are laser-cut into precise patterns. PTFE fabric is usually seamed at widths of 1.5m to 2.5m, with virtually no limit in length. Spans exceeding 60m are achievable, although rare, and potentially requiring reinforcement with structural cables. Fabric panels are pre-assembled in controlled factory conditions and packed for deployment in situ. A 200m2 panel will typically weigh approximately 300kg, and may be lifted into position by a modest crane.
Warranties
We are happy to warranty out system as required. The maximum warranty we have offered to date is 12 years. We generally advise that nay warranty should be back to back with a maintenance agreement to ensure that structural connections, moving parts and points of high structural loading are well maintained.
Specification
Architectural Membrane PTFE Coated Glass Cloth Coating Polytetrafluouroethylene Base Fabric Woven EC6 glass
Value Unit Test Method
Coated Fabric Weight (nom. +/- 5% g/m2DIN EN Thickness – (nominal)800MicronDIN EN Strip Tensile – DryBS Part 4, Method 6 or DIN Warp (min)N/5cmFill (min)N/5cmCoating Adhesion (min)75N/5cmBS Part 4, Method 6 or DIN Elongation at BreakWarp4.0%Fill4.0%Solar Transmission55%ASTM E-424-71Solar Reflectancen.a.ASTM E-424-71Available Width1.40mColourWhite
Fire Performance
External Fire Exposure RoofClass AABS 476: Part 3Fire PropagationClass 0BS 476: Part 6Spread of FlameClass 1BS 476: Part 7
Other posts by Architen Landrell
Teflon fabrics are commonly used in our daily lives, particularly in the solar panel manufacturing industry. Their unique properties make them ideal for warding off heat, cold and UV rays with their unbeatable temperature range of up to 260 degrees Celsius. This makes PTFE Teflon fabrics highly weather-resistant and able to combat constant exposure to harsh elements.
With its excellent features and long-lasting durability, it’s no surprise why solar panel manufacturers have been relying on this Teflon cloth so heavily.
If you are in the market for quality PTFE coated fabrics for use in the lamination of solar panels, look no further than Deer Hunter. These laminator release sheets provide excellent resistance to water, chemicals, corrosion and withstand high temperatures, thus adding more durability and longevity to your solar modules construction process.
Today, I’m going to share something useful with you about PTFE solar laminating fabric in order to help you make a better selection.
Now here we go!
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Teflon coated glass fabric is a new high-performance, multi-purpose composite material that can be used in a variety of applications. It is made up of a woven glass cloth substrate coated with polytetrafluoroethylene (PTFE) resin, which makes the fabric waterproof, durable and high temperature resistance.
This material has excellent electrical properties, chemical resistance, and fire retardancy. Additionally, it can remain flexible in cold temperatures and has a low surface energy that limits adhesion from various contaminants.
Teflon coated cloth is available in custom sizes and roll lengths to fit your exact needs. It can also be cut or manufactured to order.
Teflon fabric, also known as PTFE fabric, is an ideal material used in solar cell laminating machines. It consists of high quality glass fabrics and PTFE. These materials create a super smooth and high-gloss surface coating that is resistant to wear, low friction, chemical exposure and temperatures ranging from -70°C to +260°C. The non-toxic qualities of the fabrics make it safe for use in laminating solar panels and other sensitive items.
Teflon release sheets are essential in the lamination process of creating solar PV panels as protective coverings, due to their exceptional heat resistance and non-stick quality. The primary purpose of Teflon cloth is to keep the melted EVA film from attaching to the silicone rubber plate or heating plate. When EVA becomes adhered to these surfaces, removing them can be very challenging.
Color: Brown
Standard thicknesses: 0.25mm, 0.30mm, 0.35mm
Common width: mm, mm, mm, mm, mm, mm, etc.
* Technical data above is based on our general experience and is given in good faith. We are however unable to accept responsibility in respect of factors which are outside our knowledge or control. All data is subject to change without notice. Some items may not be on stock and/or a minimum order quantity may apply.
Teflon cloth is a unique material with excellent heat resistance, non-stick attributes, and anti-static properties. It’s extremely durable and tightly woven, making it a popular choice for heavy-duty applications such as those found in solar photovoltaic module plants. Its special properties make it an ideal replacement for traditional materials.
Solar lamination fabrics are an important part of the lamination process for photovoltaic modules. At least two sets (4 sheets) of these fabrics are required to be used in each solar laminator. They consist of PTFE laminated cloth which acts as a protective cover and backing cloth on the module and helps to prevent the sticking of EVA and other substances to the machine under high temperatures.
PTFE coated glass fabrics are essential for effective lamination processes and are highly reusable. However, it is important to allow them to cool down before reuse in order to avoid any transfer of EVA particles from the laminated fabric. If left on the fabric, these residual EVA particles can be transferred onto the glass during re-use, leaving behind mounds of dust that can block parts of cells and create long-term hot spot effects when used outdoors.
PTFE coated glass cloth is often used as a release sheet for many laminating processes, and also as conveyor belts for specific automatic laminator machines. For these cases, the surfaces of the PTFE must be textured to ensure that there is an adequate level of friction between it and the materials being laminated. Additionally, in order to prevent damage to either the conveyor belts or material, the tension of the belt should not be too high when conveying.
Teflon PTFE fiberglass fabric is an incredibly strong and durable material that can withstand extreme temperatures, resist to most chemicals, and has a smooth and non-stick surface. It can be used in a wide variety of applications, such as hot food electric gaskets and conveyor belts of drying machines due to its unique properties. The fabric has high strength and elongation, making it highly resistant to deformation, while also being very light weight. Furthermore, it features excellent chemical stability and has good thermal resistance between -70 to 260℃.
To ensure the longevity and stability of your Teflon PTFE coated fiberglass fabric, it’s important to practice proper maintenance habits during use. This includes regular cleaning and repair work as needed.
Notes:
Maintaining the integrity of Teflon PTFE fiberglass fabric should not be handled by anyone who is not trained and qualified in this field, in order to keep both costs and risks at a minimum. When done correctly, this fabric can provide superior strength, durability and even chemical resistance. After all, good maintenance can increase the working time of Teflon fabrics.
Is Teflon the same as PTFE?
The simple answer is that they are the same thing: Teflon™ is a brand name for PTFE (Polytetrafluoroethylene) and is a trademark brand name used by the Du Pont company and its subsidiary companies (Kinetic which first registered the trademark & Chemours which currently owns it).
What is EVA material in solar panel?
EVA is ethylene vinyl acetate, a material that has good radiation transmission and low degradability to sunlight. This is a thermoplastic polymer used in solar modules as an encapsulating agent since, by applying heat to the assembly, it forms a sealing and insulating film around the solar cells.
How many times can you reuse a Teflon sheet?
In most cases, these liners can be reused for up to a hundred or so uses. To prolong use, avoid creasing the mat and using added fats and oils.
If you’re in the market for PTFE fabrics, there are some important steps to follow before you make a purchase.
First, research different types of fabrics and materials to determine which type of PTFE fabric is best suited for your needs. Once you’ve narrowed it down, determine what kind of construction can withstand the desired application.
Next, decide if you need a standard or custom size and shape of the fabric before placing an order.
Finally, ensure that your chosen manufacturer has experience creating fabric from high-quality material to guarantee a durable product with long-lasting results.
Teflon fabric is an excellent choice for use in the solar module lamination process. It provides superior protection against wear and tear and is easy to clean and maintain.
Deer Hunter is committed to providing a wide range of Teflon fabrics in rolls or sheets to meet the varying needs of our customers and their industries.
Now it’s your turn. I want to hear from you.
Which kind of PTFE Teflon fabrics do you think you want to try?
Are you going to test this material first or place a trial order from us?
You also can send an inquiry directly from the right table sheet.
For more ptfe coated glass clothinformation, please contact us. We will provide professional answers.