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Fep film for dlp 3d printer
nFEP & the difference with regular FEP explained for 3D-printing
All MSLA 3D-printers and some DLP printers use a transparent film on the bottom of the resin tank. This transparent film is important for some reasons. It is the bottom of the resin tank and holds all the resin in the tank. Additionally it has to be transparent that the light of the LCD screen or DLP projector reaches the resin. And also it has to be stable for a long time in strength and transparency so it can be used for an extended time for replacement.
What is FEP film and why is it used in resin 3D-printing?
FEP is the abbreviation of Fluorinated Ethylene Propylene and is a copolymer of hexafluoropropylene and tetrafluoroethylene. Fluorinated ethylene propylene was invented by DuPont and is sold under the brandname Teflon FEP and belongs to the same family as Teflon and other fluorinated polymers.
Image by Wikipedia: The chemical structure of FEP
FEP is very transparent and has a great strength. It has good chemical resistance and is widely available in different film thicknesses and grades. Due to its chemical resistance, it clouds very slow when the reactive photopolymer resins cure on the film. All these properties make it a fantastic use for resin 3D-printing and a relatively cheap solution.
What is nFEP and what is the difference with regular FEP in resin 3D-printing?
In the beginning there was a lot of fuzz in the market about nFEP. It was not completely clear what it was and how it could benefit resin 3D-printing. According to Phrozen3D “nFEP film is a specially treated FEP film that has a smoother and more delicate surface. The material used for the nFEP film allows it to provide less suction force in comparison to the FEP film during printing. This means that you will have a higher success rate in resin printing when the nFEP film is installed. The nFEP film is especially suitable for fast-curing resins.”
Image by Phrozen 3D: schematic view of the differences between FEP and nFEP during printing.
These days people found out what nFEP actually is and some manufacturers are more honest about it. A chemist on Reddit did some chemical analysis on it and found out that nFEP was actually PFA. And PFA is a commercial available fluorinated thermoplastic. When matching the Epax 3D nFEP film with a commercial available PFA film, an exact match was found when measuring the chemical compounds in an FTIR
Image by Reddit user LardCream, chemical analysis of commercial nFEP looks similar than PFA plastic
They found that the differences between FEP and PFA were very small. “PFA has a higher tensile strength and elongation at break. PFA has a tensile strength of 21-31 MPa compared to 14.5-28 MPa for FEP. The elongation at break of PFA is 260-300% compared to 240-300%. So basically the force that it takes to break PFA is higher AND it is stiffer compared to FEP. This likely leads to each layer being more easily removed when lifted because the PFA fights back more, and a longer life for PFA films because of slightly higher crack resistance.
how much longer…well I only have numbers not empirical data.”
What is nFEP or PFA and what is the difference with regular FEP?
According to the fluoropolymer specialists at Boedeker plastics, Inc. ”PerFluoroAlkoxy (PFA) offers similar properties to FEP, but is considered more of a premium resin. PFA is preferred when extended service is required in hostile environments involving chemical, thermal, and mechanical stress. PFA offers high melt strength, stability at high processing temperatures, excellent crack and stress resistance, a low coefficient of friction, and more than 10 times the Flex life of FEP.”
Image by Wikipedia: The chemical structure of PFA, used in nFEP film.
Looking at the chemical structure and differences between FEP, PFA and nFEP, PFA and nFEP could actually work better. A 1-on-1 comparison is difficult to make. Regular FEP films will often fail due to user damage instead of life-cycle issues. Using FEP and nFEP for an extended time on two different machines and run a lot of parts might be the best way to get a good comparison between these three films.
FEP vs. PFA tested – update
Some months after writing this article, we finally had time to compare both in an experiment. You can find the results here.
Thermoplastic FEP Film for DLP 3D Printer
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FEP film for 3D printers SLA, DLP | Festima.Ru
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I will sell FEP film, other names: fluoroplast-4MB Grade "A", NEOFLON, TEFLON, HOSTAFLON Thickness, mm 0.
1 Appearance: The film is smooth, optically transparent, without cracks and through holes, single air bubbles are possible. Tensile strength, MPa (kgf/cm2), not less than: - in the longitudinal direction 24.4 - in the transverse direction 24.4. Relative elongation at break %, not less than: - in the longitudinal direction 300 - in the transverse direction 300 Formats: A4 (297*210mm) price 865.63 ₽ A5 (210*148mm) price 549.25 ₽ A6 (148*105mm) price 392.13 ₽ Other format - on request. The price is indicated taking into account delivery within the territory of the Russian Federation. Specify the cost without delivery. (Delivery is carried out by Russian Post (+ track number).)
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Price for 1 frame.
This film is 173*115.4mm thickness 0.15mm for ANYCUBIC Photon Mono 2K, ANYCUBIC Photon Mono 4K, ANYCUBIC Photon SE. FEP film is used for bath in Photon Mono DLP/LCD printer. In stock.
Office equipment and consumables
3 month ago Source
FEP film for 3D printer, 200x140mm, thickness 0.15
Office equipment and consumables
5 months ago Source
Frame with film for quick change. 3D printer parts FEP film 173*115.4 mm thickness 0.15 mm for ANYCUBIC Photon Mono 2K ANYCUBIC Photon Mono 4K ANYCUBIC Photon SE
Office equipment and consumables
5 months ago Source
New FEP film for Anycubic and similar 3d printers. 140x200 mm (0.15-0.2 mm) - 600 rubles 200x280 mm (0.15-0.2 mm) - 1000 rubles
Office equipment and consumables
6 months ago Source
Sell 2 new FEP films for 3D printer Anycubic Photon Zero Price for both
Office equipment and consumables
6 months ago Source
Film 140x200 mm SLA/LCD FEP 0.
15-0.2 mm thick, 8 pcs., for photonic polymer DLP 3D printer
Office equipment and consumables
7 months ago Source
FEP film for Anycubic Photon Mono 3D printer. Size 140*200 mm. Thickness 0.15 mm. The price is for 1 piece. See my other auctions.
Office equipment and consumables
8 months ago Source
FEP film for 3D printer Anycubic Photon Mono X. Size 260*175 mm. Thickness 0.15 mm. The price is for 1 piece. See my other auctions.
Office equipment and consumables
8 months ago Source
FEP (F-4MB) Russian-made, 0.1 mm, width 250 mm. The cost is based on 0.5 m.p. (1 running meter = 2300 rubles). The minimum cut is 0.5 m.p. The film has proven itself very well, better than Chinese.
Office equipment and consumables
8 months ago Source
New film for 3D printer in package
Office equipment and consumables
9 months ago Source
FEP film for photopolymer 3D printer Size 200 x 260 mm Thickness 0.
15 mm
10 months ago Source
FEP film for Anycubic Mono X manufactured by Anycubic.
Office equipment and consumables
10 months ago Source
New Fep film, 4 pieces available, price is for 1 piece.
Office equipment and consumables
a year ago Source
ANYCUBIC FEP film for Photon Mono X 3D printer, 5 pcs. I bought it in the hope that it would fit Photon Mono, but this is exactly for X. I did not return it, I sell it cheaper to you)
Office equipment and consumables
a year ago Source
FER Film for Anycubic Mono X High quality FEP film (Teflon film) which has high optical transparency and uniform thickness. FEP film has a surface with excellent anti-adhesive (non-stick) properties and high strength, which allows you to build a model with high accuracy. The material is resistant to temperature, chemicals and UV radiation.
Used to cover the bottom of the bath of Anycubic photopolymer 3D printers. The price is for 1 piece
Office equipment and consumables
a year ago Source
4 pcs. 145x100x0.15 mm sheet FEP film 0.15 mm thick
Office equipment and consumables
a year ago Source
Photopolymer from a well-known manufacturer. Banks on 0,5kg Delay. Part February, part July this year. From two cans of 1000 rubles. All together - 11500r. There are also fep films, silicone covers for the bath, reusable funnels with a filter, steel plates with a magnet for quick removal of the model. Search in the profile or write.
Office equipment and consumables
a year ago Source
FEP film for LCD SLA printers such as Anycubic Photon, Creality LD-002R/LD-002H 350*220 1 piece
Office equipment and consumables
a year ago Source
FEP Film for 3D Printers 210x297mm.
