Polyethylene terephthalate film

The most generally useful polyester is that made by reaction between dimethyl terephthalate (dimethyl 1,4-benzenedicarboxylate) and ethylene glycol (1,2-ethanediol). The product is used under the trade name Dacron to make clothing fiber and tire cord and under the name Mylar to make recording tape. The tensile strength of polyethylene terephthalate) film is nearly equal to that of steel. 

Orientation in polyethylene terephthalate film. J. chem. Phys. 27,... 

Polyethylene terephthalate) film with paper backing Varnished cotton. 

Polyethylene terephthalate film (Mylar) is often used at cryogenic temperatures for electrical- or thermal insulation, as described in the preceding section. However, the radiation tolerance of Mylar is rather poor as shown in Fig. 5. Takamura and Kato reported that Mylar was too brittle to handle after irradiation of 6.2 x 106 Gy at 5 K [45]. 

Fig. 2. Cls core-level spectrum of a polyethylene terephthalate) film...

Saran (Dow polyvinylidene dichloride) is a tough, chemically resistant plastic available in a variety of forms that are useful in the laboratory. Saran pipe or tubing can easily be welded to itself or sealed to glass and is useful for handling corrosive solutions. Thin Saran film, available commercially as a packaging material, is useful for windows, support films, etc. Mylar (du Pont polyethylene terephthalate) film and other polyester films are also useful for these purposes. Mylar is chemically inert and has excellent electrical properties for electrical insulation and for use as a dielectric medium in capacitors. Much thinner than these are films that can be made in the laboratory by allowing a dilute ethylene dichloride solution of Formvar (polyvinyl acetal) to spread on a water surface and dry. 

Fig. 3.9 The topography of water-soluble surface-graft 2-(dimethylamino)ethyl methacrylate chains on a polyethylene terephthalate) film imaged by CM-AFM. Reproduced with permission from [23]. Copyright 1997. American Chemical Society...

Silicon liquids (a solution of silicon-organic rubber in gasoline) and polyethylene terephthalate film are used to prevent sticking of finished articles to forms. It is worth noting that polyester film is most effective. With its application, RubCon articles are easily removed from the form and have a brilliant surface. 

The volume resistivity of an unplastlclzed pottant material such as EVA is 10 ohm-cm. The module current leakage at 1.5 kV with EVA is an order of magnitude lower than with plasticized PVB at 25-30°C and there appears to be no rise in leakage at 50-60°C. (See Figure H and Table I.) Similarly, the current leakage of modules containing plasticized PVB can be blocked by the Insertion of an additional high volume resistivity layer such as polyethylene terephthalate film as discussed below, which is resistant to the solvation effect of dlester plasticizers. 

Tedlar is moderate in cost and has known long-term performance out-of-doors. It has excellent toughness, good weather resistance, and moderately good electrical and optical performance. Its thermal stress resistance is marginal but adequate (2-6> shrinkage at 150°C) for most needs. Its cost is higher than optimum, but can be used as a thin film, especially when coupled with less expensive polyethylene terephthalate film for better electrical properties at a lower cost. 

There are three layers in decorative floor covering. The second and the third layers are made from PVC with composition given in the table above. The surface layer is made from polyethylene terephthalate film which protects decorative patterns printed by gravure printing under polyethylene terephthalate film. 

Polystyrene films and polyester (polyethylene terephthalate) films are only used in the biaxially stretched form, because unstretched films are very weak and brittle. To a lesser extent this is also true for polypropylene films. Roll-quenched flat film is used for many packaging applications, but below 0°C these films become brittle. Biaxially oriented polypropylene film, on the other hand, is not brittle at a temperature as low as — 50°C and is suitable for packaging frozen foods. 

Cheng, T.S., Lin, H.T., Chuang, ML Surface iluorination of polyethylene terephthalate films with RF plasma. Mater. Lett. 58, 650-653 (2004)... 

Polyethylene terephthalate film. See Polyethylene terephthalate Poly (ethylene tetrafluoride). See Pol etrafl uoroethylene Poly (ethylene-tetraf I uoroethylene). See Ethylene/tetrafluoroethylene copolymer Polyethylene, ultrahigh m.w. 

Applied Spectroscopy 51, No.3, March 1997, p.346-9 AMPLITUDE SPECTRUM APPROACH IN DYNAMIC FT-IR SPECTROSCOPY OF UNIAXIALLY ORIENTED POLYETHYLENE TEREPHTHALATE FILMS. I. DRAW RATIO DEPENDENCE... 

ASTM D2673 provides a standard specification for oriented polypropylene film, and similarly ASTM D3664 provides a specification for biaxially oriented polyethylene terephthalate film for electrical applications. 

The majority of results so far available in this Held have been derived from spectra recorded on dispersive instruments. In order to test tl validity of Eq. (1) several independent experiments have been performed in which a highly oriented polyethylene terephthalate film is subjected stepwise to increasingly higher stresses in the stretching machine illustrated in Fig. 1 and FTIR spectra are taken at the relaxed stress levels with unpolarized radiation. In Fig. 4 the wavenumber shifts of the v(0—CH2) absorption band are plotted as a fimctimi of the applied stress for different experiments. From these systematic investigations, however, no linear relationship between the wavenumber shift Av and the plied stress good index of determination (0.98) was obtained for the power function ... 

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