Formvar
| Names | |
|---|---|
| IUPAC name
Polyvinyl formal
| |
| Identifiers | |
| ChemSpider |
|
ECHA InfoCard
|
100.109.921 |
| EC Number |
|
CompTox Dashboard (EPA)
|
|
| Properties | |
| Appearance | White to straw colored powder |
| Density | 1.23 g/mL |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Formvar refers to any of several
"Formvar" used to be the registered
Applications
Formvar is used in many different applications, such as wire insulation, coatings for musical instruments, magnetic tape backing, and support films for
Magnet wire
The major application of formvar resins is as
Transmission electron microscopy
Most specimens used in transmission electron microscopy (TEM) need to be supported by a thin electron-transparent film to hold the sample in place.[6] Formvar films are a common choice of film grid for TEM. Formvar is favored because it allows users to utilize grids with lower mesh rating.
Physical characteristics
Formvar resin has a high softening point and strong electric insulation properties. It is also very flexible, water-insoluble, and resistant to abrasion. Formvar is also halogen free. Formvar resins are combustible and can cause
References
- ^ "Formvar". Merriam-Webster.com. Merriam-Webster, Inc. 2014. Retrieved 10 July 2014.
- ISBN 978-3-527-33823-8.
- ISBN 978-0-306-47749-2.
- ISBN 978-0-521-01815-9.
- ISBN 978-0-471-45920-0.
- ISBN 978-94-009-3139-8.
- ISBN 978-0-12-521535-0.