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Polyester-Nylon Composite Yarn

-- Steady & Reliable Manufacturer --

What Is Polyester-Nylon Composite Yarn

Polyester-nylon composite yarn combines PET (polyester) and PA6 or PA66 (nylon) in a single filament through bicomponent spinning, most often in a side-by-side or segmented-pie cross-section. Instead of blending two separate yarns, both polymers are extruded together at the spinneret so each filament physically contains both materials.

The idea behind this construction is to combine strengths from both fibers in one yarn: polyester brings dimensional stability, quick-drying behavior, and cost efficiency, while nylon contributes softness, better dye affinity, and a smoother hand-feel. The result is a filament that fabric mills can dye, knit, and finish more efficiently than working with two separate yarns.

Common Cross-Section Types

Side-by-side construction is popular for producing self-crimping yarn, since the two polymers shrink at different rates and cause the filament to curl naturally after heat treatment, giving stretch and bulk without adding spandex. Segmented-pie construction is more common when the goal is fine denier splitting for a soft, peach-touch fabric surface.

Where GC FIBER Fits In

As a manufacturer running our own composite spinning lines, we can adjust the PET/PA ratio, cross-section shape, and denier to match a specific fabric spec, then keep those settings consistent across repeat orders.

Related products

Services

We insist on timely and fast service, the implementation of all-weather tracking service, adequate spare parts inventory, so that our customers have no worries.

  • Wide Variety

    Wide Variety

    Design & Manufacturing. In stock or customizable.

  • Sample and Catalog

    Sample & Catalog

    OEM/ODM available.

  • Production and Delivery

    Production & Delivery

    Flexible production and delivery policies

  • Business Experience

    Business

    Over 19 years of experience in eco-friendly textile products

Specification

CompositionPET (polyester) + PA6 / PA66 (nylon), bicomponent filament
PET/PA Ratio70:30, 60:40, 50:50 (custom ratios available)
Cross-SectionSide-by-side (self-crimping) or segmented-pie (splittable, fine denier)
Total Denier Range50D – 300D
Filament Count24F / 36F / 48F / 72F (custom counts available)
Tenacity3.0 – 4.5 cN/dtex
Elongation at Break20% – 40%
Boiling Water Shrinkage≤ 10%, higher for self-crimping grades by design
Crimp Contraction (side-by-side type)15% – 30%, adjustable via heat-setting conditions
Melting PointPET side approx. 255-260°C; PA side approx. 215-225°C
ColorRaw white / dope-dyed / customer-specified shade
PackageCone (1.5 – 2.5 kg net) or as agreed, carton packing
MOQ300 kg per specification for standard grades

Application

This yarn is chosen where a fabric needs the practical durability of polyester along with the softness and dye response of nylon, without the cost of a 100% nylon fabric. Typical uses include:

  • Activewear and sportswear: leggings, base layers, and compression wear that benefit from natural crimp and stretch.
  • Socks and hosiery: where softness against the skin and good recovery are both important.
  • Swimwear linings and intimate apparel: soft hand-feel combined with dimensional stability after repeated washing.
  • Home textiles: upholstery and curtain fabrics that need a smoother, more refined surface than pure polyester.
  • Technical and functional textiles: fabrics requiring balanced moisture management and mechanical strength.

Advantage

  • Best of both fibers in one yarn: polyester strength and stability paired with nylon's softness and dye affinity.
  • Natural crimp without added spandex: the side-by-side structure self-crimps after heat setting, giving stretch and bulk at a lower cost.
  • Better dyeability than pure polyester: the nylon portion takes acid dyes well, which can widen your color options and shorten dyeing time.
  • More cost-efficient than 100% nylon: you get much of nylon's hand-feel benefit while keeping raw material cost closer to polyester.
  • Stable, repeatable ratios: as the factory running the spinning line, we hold the PET/PA ratio and cross-section consistent order after order.

Payment Terms

We accept T/T (30% deposit, balance before shipment or against copy of B/L), L/C at sight for larger orders, and Western Union / PayPal for sample or small-quantity orders. Quotations are typically given in USD, with other terms discussed for long-term partners.

Shipping & Delivery

Standard terms are FOB Shanghai / Ningbo, with CIF and DDP arranged on request. Samples ship by express courier within 3-5 working days. Bulk production lead time is generally 12-20 days after deposit and specification confirmation, shipped by sea freight (FCL/LCL) or air freight when needed for urgent timelines.

  • Q: What is the benefit of blending polyester and nylon in one filament instead of just mixing two yarns?
  • A: Because both polymers are extruded together at the spinneret, every single filament carries the properties of both fibers, which gives more even performance across the fabric than simply plying two separate yarns.
  • Q: Does this yarn stretch without adding spandex?
  • A: Side-by-side constructions self-crimp after heat setting because the two polymers shrink at different rates, which naturally adds stretch and bulk to the fabric.
  • Q: Can the PET/PA ratio be adjusted?
  • A: Yes, common ratios are 70:30, 60:40, and 50:50, and we can also discuss other ratios depending on the hand-feel and stretch you need.
  • Q: Is dyeing more complicated with two different polymers in one filament?
  • A: It requires attention to dye class and temperature since PET and PA respond differently to dyes, but our technical team can share recommended dyeing parameters based on your ratio and equipment.
  • Q: What is the minimum order quantity and sample lead time?
  • A: Standard MOQ is 300 kg per specification, and samples are usually ready to ship within 3-5 working days after confirmation.
About
GC FIBER
GC FIBER has been a special textile factory in China since 2006 years. We are devoted to researching, developing, producing, and selling special and functional eco-friendly textile products.
Our products include Biodegradable Yarn, Low Melting Yarn, ECDP Yarn, Anti Static Yarn, HDPE Yarn, Bio-component Yarn, and Polyester Filament Yarn.
We are always interested in cooperating with our guests to develop new material.

WHY WE ARE SO TRUSTED

We have got a high reputation in both domestic and overseas markets.

Professional

We will communicate with customers professionally, listen to their opinions and give useful suggestions, and spend time and energy to solve every problem, no matter all the problems you encounter.

Quality

We have strict quality control requirements and the advanced testing equipment in the industry. Every process has professionals to conduct inspections to ensure product quality.

Cost

We have a number of production lines, a number of production machines, comprehensively improve product quality and production efficiency.

Design and R&D

We devote to research, development, production and sales of special and functional eco-friendly textile product.

Diversity

Our product includes PBS biodegradable product, recycled easy dyeing cationic yarn, PLA yarn, Low melting yarn, Anti-Static yarn ,PBS fiber, PLA fiber, FR nylon fiber etc.

Capacity

The company has sufficient production capacity and high control over raw material prices, quality and stable supply, which can meet the needs of customers with different procurement volumes.

Service

We insist on timely and fast service, the implementation of all-weather tracking service, adequate spare parts inventory, so that our customers have no worries.

Shipment

We are near Ningbo Port and Shanghai Port, and are very convenient and quick to transport cargo to other national capitals.

Diversified Professional Team

GC FIBER has unique sales, research and development, design, production departments and expertise to provide customers and stakeholders in various industries with specialty, functional and environmentally friendly textiles.

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