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Physical Properties
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Metric
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English
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Density
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1.00 – 1.51 g/cc
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0.0361 – 0.0546 lb/in³
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Water Absorption
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0.150 – 0.800 %
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0.150 – 0.800 %
|
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Moisture Vapor Transmission
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0.0120 – 1.20 cc-mm/m²-24hr-atm
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0.0305 – 3.05 cc-mil/100 in²-24hr-atm
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Water Vapor Transmission
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4.00 – 104 g/m²/day
|
0.258 – 6.70 g/100 in²/day
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Physical and Chemical Properties
Resistant to weak acids, weak alkalis, bleach and most organic solvents. Degrades in strong alkalis, strong acids, cresol. Fibers are smooth. Cross section = circular, trilobal or polygon. Moisture regain 0.1-0.4%; Tenacity = 2.2-9.5 g/denier; Elongation = 10-50%
| Melting Point | 238-290 |
|---|---|
| Density | 1.23-1.38 |
| Refractive Index | 1.54, 1.72 |
Description Polyester knit dress MFA# 200691 Polyester fibers at 200x Transmitted light (left) Polarized light (right)
A manufactured fiber in which the fiber-forming substance is any long chain synthetic polymer composed of at least 85% by weight of an ester of dihydric alcohol and terephthalic acid (Federal Trade Commission definition). The first viable polyester fiber (Terylene) was developed by English chemists, J. R. Whinfield, and J.T. Dickson, in 1941. It was first sold in the U.S. as Dacron in 1951 and is now the most widely used fiber, even surpassing cotton. Polyester is strong and resistant to shrinking, stretching, creasing, insects and most chemicals. The specific properties, however, vary significantly depending on the type of polyester fiber. Many are modified to increase flame, crush or oil resistance. The fiber cross section is often made into different shapes to change the feel and appearance of the fibers. Polyester is primarily used in clothing and home furnishings. It is often blended with Wool, Cotton, rayon, or Flax.
For polyester fiber identification, see http://cameo.mfa.org/wiki/Category:FRIL:_Polyester
WHAT IS POLYESTER? | S1:E3 | Fibers and Fabrics | Beate Myburgh
FAQ
What is the density of solid polyester?
What is the bulk density of polyester?
What is the density of polyester kg m3?
What is the density of nylon poly?
What is the specific gravity of polyester?
The specific gravity 1.38 or 1.22 depending on the type of polyester fibers is moderate. Polyester fibers have a density greater than polyamide fibers and lower than rayon. Fabrics made from polyester fibers are medium in weight. The melting point of polyester is close to that of polyamide, ranging from 250 to 300°C.
What is the melting point of polyester?
The melting point of polyester is close to that of polyamide, ranging from 250 to 300°C. Polyester fibers shrink from flame and melt, leaving a hard black residue. The fabric burns with a strong, pungent odor. Heat setting of polyester fibers, not only stabilizes size and shape but also enhances wrinkle resistance of the fibers.
What is polyester fiber?
Polyester fiber is a “manufactured fiber in which the fiber forming substance is any long chain synthetic polymer composed at least 85% by weight of an ester of a dihydric alcohol (HOROH) and terephthalic acid (p-HOOC-C6H4COOH)”.
How strong is polyester fiber?
Strength & Absorption: With strengths ranging between 4-7 gr/denier for filaments, polyester fibers are robust. Their low moisture absorption (0.2-0.8% under standard conditions) ensures comfort in warm climates. Polyester fibers exhibit resistance to a range of chemicals, including acids, solvents, and bleaches.