Aramid
Aramid is a synthetic fiber made from aromatic polyamide, a material used for protective clothing, workwear, bags, and other products that take advantage of its high strength and heat resistance.
Contents6 sections
Definition and Overview
Aramid is a high-performance fiber in the polyamide family with aromatic rings in its molecular structure. Even though it is also a polyamide, its properties and applications differ from those of common nylon. Depending on the required function, meta-aramid and para-aramid are mainly used.
Meta-aramid is used for applications that emphasize heat resistance and flame resistance, while para-aramid is used for applications that emphasize high strength and high elasticity. Actual textile performance depends not only on the type of fiber, but also on the weave, density, blend ratio, and finishing.
Features
Aramid textiles generally tend to feel firm and stiff, and it is easy to achieve strength even in lightweight fabrics. The surface feel changes depending on the weave and blended materials, ranging from smooth woven fabrics to ripstop that emphasizes durability.
Some are excellent in heat resistance, flame resistance, tensile strength, and abrasion resistance. On the other hand, not all aramids have the same performance. In particular, flame resistance, protective performance, and chemical resistance need to be confirmed according to the type of aramid used and each textile design.
Many aramids are not easily melted by heat, but they may deteriorate under prolonged exposure to high temperatures. Also, depending on the type, they may be susceptible to the effects of ultraviolet light, so for products used outdoors, protection through outer fabric or coating should be considered.
Main Applications
Taking advantage of heat resistance and flame resistance, they are used for workwear, protective clothing, fire and rescue-related garments, gloves, and more. In applications that take advantage of high strength, they are also used for outdoor outerwear and pants, bags, reinforcement fabric, motorcycle wear, and more.
In apparel, they may be used alone, or blended with cotton, wool, nylon, polyester, and others to balance comfort, durability, appearance, and cost. Thermal retention and moisture absorption should not be judged by the fiber name alone; check them together with the fabric thickness and structure.
Selection and Handling Notes
When selecting, clarify the performance required for the application and check test information such as composition, weave/knit structure, fabric weight, tensile, tear, and abrasion strength, and flame resistance. For protective applications, it is important not to judge safety by the material name alone, but to confirm whether it meets the standards and specifications required as a product.
Shrinkage and dimensional changes differ depending on the type of aramid, textile structure, blended fibers, and finishing. Before mass production, conduct washing tests and sewing tests to confirm shrinkage rate, appearance changes, and seam condition. Follow the washing, drying, and ironing instructions on the fabric or product label without exception.
High-strength fabrics are difficult to cut and may cause blades to wear out faster. In sewing, check for needle damage, seam puckering, and seam slippage, and determine the needle, thread, and feeding conditions suitable for the fabric through testing. Strong chemicals and excessive heat treatment can affect performance and color tone, so caution is needed.
Differences from Similar Terms
Nylon is a synthetic fiber mainly made of aliphatic polyamide and is widely used for apparel and industrial materials. Aramid is also a type of polyamide, but its structure contains aromatic rings, making it a material designed to emphasize heat resistance and strength more than general nylon.
Polyester is a synthetic fiber widely used for its dimensional stability and ease of handling. Aramid is suitable for high-performance applications, but its dyeability, sensitivity to ultraviolet light, and ease of processing and sewing differ from polyester, so it should be selected according to the required performance and product conditions.
Frequently Asked Questions
Does aramid shrink when washed?
The degree of dimensional change depends on the type of aramid, weave/knit structure, blend ratio, finishing, and washing/drying conditions. It cannot be said that aramid never shrinks, nor that it always shrinks. Before adoption, conduct washing tests under conditions close to actual use and check the shrinkage rate and appearance changes.
Can aramid textiles be sewn with a household sewing machine?
Depending on the thickness and density of the fabric, sewing is possible, but high-strength aramid may put a load on the needle and cutting blade. First, test the needle size, thread, thread tension, and stitch length on a scrap piece, and then sew the final product after confirming that there are no skipped stitches, thread breakage, or puckering.
What is the difference between aramid and nylon?
Both are synthetic fibers in the polyamide family, but aramid has a molecular structure containing aromatic rings and is used for applications that require heat resistance and high strength. Nylon is used in a wide range of applications, from apparel to bags, taking advantage of its flexibility and abrasion resistance. Selection should be based on the performance required for the application.
