Polyvinyl Fluoride PVF Tedlar

Adhesives recommended include acrylics, polyesters, epoxies, elastomers, and pressure-sensitive adhesives. 

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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. 

Tedlar Polyvinyl fluoride, PVF, film E. I. du Pont de Nemours... 

Polyvinyl fluoride characterization as a resin has not been published. DuPont produces films (Tedlar ) which are specified by typical film properties (described in Ch. 13). One characteristic that has been described in a number of early patents is intrinsic or inherent viscosity to compare different grades of In an example, polyvinyl fluoride was dissolved by stirring at the reflux temperature in hot cyclohexanone and the relative viscosity R V) was measured in a bath at 144°C after 75 minutes. Time of efflux of PVF solution (Ti) and solvent (Tq) through a viscometer such as Canon-Fenske was measured and relative viscosity was calculated according to Eq. (5.17). The ratio of the natural logarithm of relative viscosity to the concentration of polyvinyl solution (C, g/dl) is called the intrinsic or inherent viscosity (in Eq. 5.18, dl/g). 

The only known commercial producer of polyvinyl fluoride is DuPont Company. Tedlar is DuPont s trademark for oriented and unoriented films and three grades of PVF resin for special coatings applications. PVF films are tough, durable, preformed polyvinyl fluoride films that are manufactured in continuous rolls. PVF films can be oriented or nonoriented. Film thickness can range from 12.5 to 75 pm and can be treated for adherability or left untreated for release applications. 

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