Polyester, Nylon, and Aramid Sewing Thread: Sizes and Diameters

Polyester, nylon, and aramid are all popular materials used for making filament sewing threads for sewing and other applications. the choice of thread material will depend on the specific application and the required properties of the finished product. Polyester and nylon threads are commonly used for a wide range of sewing projects, while aramid thread is reserved for specialized applications where extreme strength and heat resistance are necessary.

The characteristics of 3 types of sewing thread

Here are some characteristics of threads made from these materials:

Polyester thread

• Polyester thread is strong and durable, with good resistance to abrasion, chemicals, and sunlight exposure.
• It has a low moisture absorption rate, which means it dries quickly and is less likely to rot or mildew.
• Polyester thread is available in a wide range of colors and is commonly used for general sewing, upholstery, and outdoor applications.

Nylon thread

• Nylon thread is known for its excellent strength, elasticity, and resistance to abrasion.
• It has a high melting point, which makes it suitable for use in high-temperature applications.
• Nylon thread is available in various colors and is commonly used for sewing heavy fabrics, leather, and canvas.

Aramid thread

• Aramid thread is extremely strong and heat-resistant, making it ideal for use in applications where safety and durability are paramount.
• It has a low elongation rate, which means it maintains its shape and tension under stress.
• Aramid thread is commonly used for sewing protective clothing, industrial fabrics, and safety equipment.

The density of 3 types of yarn

The density of a fiber refers to its mass per unit volume. It’s important to note that the density of fiber can affect its properties and performance in different applications. For example, the higher density of aramid fibers contributes to their exceptional strength and resistance to heat but also makes them less flexible and more difficult to work with than polyester or nylon fibers. Here are the approximate fiber densities of polyester, nylon, and aramid:

Polyester

• The density of polyester fibers is around 1.38 to 1.39 grams per cubic centimeter (g/cm³).
• This relatively low density makes polyester fibers lightweight and easy to care for.

Nylon

• The density of nylon fibers is around 1.14 to 1.15 g/cm³.
• This is a lower density than polyester, which also contributes to the lightweight and comfortable feel of nylon fabrics.

Aramid

• The density of aramid fibers is around 1.44 to 1.46 g/cm³.
• This is a higher density than both polyester and nylon, which makes aramid fibers more rigid and stiffer than the other two fibers.

The size and diameters of the common three kinds of sewing thread

Polyester, nylon, and aramid are all synthetic fibers commonly used in the textile industry. Here are the sizes and diameters of these fibers:

Common Nylon 6,6 Sizes and Diameters

Nylon fibers are also available in a range of sizes, from microfibers to microfibers.

Nylon 6,6 Fiber Density		1.14 g/cm3
Yarn	Size	Estimated	Diameter
Denier	Decitex	Inches	mm
420	467	0.0078	0.23
500	556	0.0085	0.25
630	700	0.0095	0.28
840	933	0.0110	0.32
1050	1167	0.0123	0.36
1260	1400	0.0134	0.40
1680	1867	0.0155	0.46
2000	2222	0.0169	0.50
2520	2800	0.0190	0.56
3000	3333	0.0208	0.61
4000	4444	0.0240	0.70
5040	5600	0.0269	0.79

Common Polyester Yarn Sizes and Diameters

Polyester fibers come in various sizes, ranging from microfibers to microfibers.

Polyester Fiber Density		1.38 g/cm3
Yarn	Size	Estimated	Diameter
Denier	Decitex	Inches	mm
420	467	0.0071	0.21
500	556	0.0077	0.23
660	733	0.0088	0.26
840	933	0.0100	0.29
1000	1111	0.0109	0.32
1100	1222	0.0114	0.34
1300	1444	0.0124	0.37
1500	1667	0.0133	0.39
1680	1867	0.0141	0.42
2000	2222	0.0154	0.45
2600	2889	0.0176	0.52
3000	3333	0.0189	0.55
4000	4444	0.0218	0.64
5000	5556	0.0244	0.72
6000	6667	0.0267	0.78

Common Aramid Yarn Sizes and Diameters

Aramid fibers are known for their exceptional strength and heat resistance, making them suitable for applications such as bulletproof vests and fire-resistant clothing.

Aramid Fiber Density		1.44 g/cm3
Yarn	Size	Estimated	Diameter
Denier	Decitex	Inches	mm
400	444	0.0067	0.20
840	933	0.0098	0.29
1000	1111	0.0107	0.31
1420	1578	0.0127	0.37
1500	1667	0.0131	0.38
2000	2222	0.0151	0.44
2250	2500	0.0160	0.47
2840	3156	0.0180	0.53
5680	6311	0.0254	0.75
7100	7889	0.0284	0.84