Polyvinylidene Chloride PVDC
PROPERTIES OF PVDC
- superior chemical resistance
PVDC yarn is resistant to acids and alkalis, and is insoluble in oils and most organic solvents, making it suitable for use in applications involving exposure to chemicals. (Note that it is soluble in some solvents such as tetrahydrofuran and cyclohexanone.)
- extremely low moisture regain
With a moisture regain of less than 0.1%, its physical properties are almost completely unaffected by absorbed water. This makes PVDC yarn well-suited for use underwater, outdoors exposed to rain, and even in demanding fields such as wastewater treatment and undersea applications.
- freedom from mold, bacteria damage
PVDC yarn is nearly impervious to mold, bacteria, and insects, so its properties are not degraded in highly humid environments or mud. PVDC yarn is often used underground and in contact with sludge.
- high elastic recovery
With an elastic recovery of approximately 95% (from 3% elongation), PVDC yarn resists wrinkling and creasing.
- fast color and excellent gloss
Because pigment is added before fiber spinning, PVDC yarn displays vivid color with excellent colorfastness, retaining its translucence and luster even with exposure to sunlight and weather. Its high permeability to light enables use in applications where light transmission is required.
- flame retardancy
PVDC yarn is inherently self-extinguishing, making the addition of flame-retardants unnecessary. This means consistent, uniform flame-retardant properties, free from variations which occur during flame-retardant compounding. PVDC yarn plays an important role in applications requiring high flame-retardant properties.
| tensile strength | up to 20 cN/tex |
| tensile elongation | up to 30% |
| knot strength | up to 14.3 cN/tex |
| young's modulus | 1.18 GPa - 1.77 GPa |
| elastic recovery | > 95% at 3% elongation |
| refractive index | nD20 = 1.61 |
| specific gravity | 1.7 g/cm^3 |
| moisture regain | < 0.1% |
| softening point | 145°C - 165°C |