PVF Tedlar

Polyvinyl fluoride (PVF) (Tedlar) has the foliowing repeating unit ... 

Polytetrafluoroethylene (PTFE Teflon) was discovered accidently by PlunkettCZ nd commercialized by DuPont in the 1940 s. This polymer has a solubility parameter of about 6H and a high melting point of 327°C and is not readily moldable. Poly-chlorotrifluoroethylene (CTFE, Kel-F), the copolymer of tetrafluoroethylene and hexafluoropropylene (FEP), polyvinylidene fluoride (PVDF, Kynar), the copolymer of tetrafluoroethylene and ethylene (ETFE), the copolymer of vinylidene fluoride and hexafluoroisobutylene (CM-1), perfluoroalkoxyethylene (PFA) and polyvinyl fluoride (PVF, Tedlar) are all more readily processed than PTFE. However, the lubricity and chemical resistance of these fluoropolymers is less than that of PTFE. 

ACRONYM. TRADE NAMES PVF, Tedlar PVF Film, Tedlar SP Film, PV-116 Resin CLASS Vinyl polymers REPEAT UNIT (CH2CHF) -... 

Poly(vinyl fluoride) is available from Du Pont both as a resia and as transparent and pigmented films under the trademark Tedlar PVF film. Films are available ia nonoriented and oriented grade ia several tensile modifications and thicknesses, with either adherable or nonadherable release-grade surfaces. The 1992 prices ranged from 30 to 70/kg, vs 24 to 62/kg ia 1988. Prices for specially tailored films were significantly higher. 

PVF has better heat resistance than PVC and exceptionally good weather resistance. It will bum slowly. Instability at processing temperatures makes handling difficult but this problem has been sufficiently overcome for Du Pont to be able to market their Tedlar film. 

Technora fiber, 13 376-377 TechStreet technical information superstore, 15 763 Tecnoflon, 7 641 Tecomanine, 2 101 Tectosilicates, 22 453t Tedisamil, 5 106 Tedlar PVF film, 20 592 Teflon... 

Vinyl fluoride is an interesting monomer, precursor of PVF or Tedlar (produced by the Dupont Company), known for its good resistance to UV radiation. But in telomerisation, the most intensive work was achieved by Tedder and Walton who used several telogens exhibiting cleavable C-Br or C-I bonds, under UV at various temperatures (Table 17). Their surveys were mostly devoted to the obtaining of monoadduct and to their kinetics (e.g., determination of relative rate constants of formation of normal and reverse isomers and of Arrhenius parameters). 

Kynar and Tedlar (PVF3 and PVF) nearly met the desired specular transmittance and showed little or no optical and mechanical degradation after the equivalent of 16 years exposure. Metallzed polyesters and polycarbonates met initial optical and mechanical requirements but showed severe property degradation after relatively short environmental exposure. 

PVF trade literature, E.I. duPont de Nemours Co., Inc., for Tedlar, which is a registered trademark. 

General Properties DuPont Tedlar PVF film properties include excellent resistance to weathering, outstanding physical properties, and inertness towards a wide variety of chemicals, solvents, and staining agents,... 

Table 8-01. Film Properties of DuPont Tedlar PVF Film...

Poly (vinyl fluoride) (PVF), A representative of fluoroplastics, it is a weatherable and chemical resistant thermoplastic. Its service temperature ranges from —70 to + 100 °C. Glass fibre-reinforced polyester sheets are coated with a thin PVF film for weather protecting. Trade name of PVF film Tedlar (USA). 

General description PVF is available only in film form. DuPont Tedlar films are available in clear, translucent, or opaque white film and in several surface finishes. 

Transportation Tedlar film is suitable for fiberglass truck bodies (high salts resistance) and for aircraft interiors. Others production of labels and electrical insulation. Moreover, Tedlar laminated with other films, like polyester, PVF, etc., becomes an ideal product for the realization of solar cells, decorative panels and road signs. 

Product coding logical for DuPont Tedlar PVF film products is given in Table 9.5. 

Figure 9.154 Ultimate elongation vs. temperature for several DuPont Tedlar Type 3 and Type 5 PVF films [18].

Figure 9.163 Elongation at break vs. temperature for several DuPont Tedlar SP clear PVF films [19],...

Figure 9.166 Dielectric constant vs. frequency at various temperatures of DuPont Tedlar TST20BG4 PVF film [20].

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