Synthetic Polymer
A polyamide thermoplastic produced by the ring-opening polymerization of caprolactam is used to manufacture high-strength synthetic yarns. In garment production, nylon 6 is valued for its exceptional abrasion resistance, elasticity and dyeability. This polymer is extruded into fine filaments for use in swimwear, outerwear and industrial fabrics.
Its low melting point simplifies the recycling process.
Physical Properties
The molecular structure of this polyamide provides high tensile strength and excellent recovery from stretching. Filaments made of nylon 6 absorb more moisture than polyester, which improves the wear comfort of the finished apparel. This moisture absorption also allows the yarn to be dyed easily with acid dyes, yielding bright and durable colors.
However, this affinity for moisture can lead to dimensional changes in wet conditions, which must be managed during fabric design.
Recycling Loop
This synthetic material can be chemically depolymerized back into its starting monomer, caprolactam, through heating and chemical treatment. The recovered monomer is then purified and repolymerized, creating a recycled yarn that matches the performance of virgin material. This chemical recycling process reduces the reliance on fossil fuels.
It is a major focus of circular fashion initiatives.
Industrial Application
Due to its high wear resistance, the fibre is widely used in carpets, tire cords and heavy-duty ropes. This durability ensures that the products have a long service life even under demanding conditions.
