When choosing a hot melt yarn for bonding, lamination, or seamless garment production, the two most common types are Polyester and Polyamide (also known as Nylon). While both are thermoplastic adhesive yarns that melt when heated, they serve slightly different purposes.
If you're not sure which one to use, this guide will walk you through the differences-so you can make the right decision for your materials, machinery, and end product.
1. Melting Point
Polyamide (Nylon) Hot Melt Yarn
Melting Range: 85°C – 110°C
Melts at a lower temperature, making it ideal for delicate fabrics or heat-sensitive materials.
Polyester Hot Melt Yarn
Melting Range: 110°C – 150°C
Requires higher temperatures, but offers better heat resistance once set.
✔️ Use polyamide for low-temperature bonding.
✔️ Use polyester where heat resistance after bonding is essential.
2. Bonding Flexibility & Softness
Polyamide Yarn creates soft, stretchy bonds. It's perfect for:
Seamless sportswear
Underwear
Knitwear
Stretch fabrics
Polyester Yarn produces firmer, more stable bonds, which is useful in:
Automotive fabrics
Upholstery
Bags and industrial textiles
✔️ Choose polyamide if you need soft-touch and flexibility.
✔️ Choose polyester if stability and structure are more important.
3. Wash and Heat Resistance
Polyester Hot Melt Yarn stands up better to:
High-temperature washing
Ironing and heat pressing
UV exposure
Polyamide Hot Melt Yarn is more sensitive to heat but holds up well under regular washing.
✔️ For durable, high-temperature conditions, polyester is the better pick.
4. Fabric Compatibility
Polyamide Yarn works best with nylon, spandex, lycra, and elastic blends.
Polyester Yarn bonds more effectively with polyester, cotton blends, and nonwovens.
✔️ Match yarn type to your fabric base for stronger adhesion.
5. Processing Equipment Compatibility
Both yarns work with:
Heat press
Hot air bonding
Laminating machines
Ultrasonic bonding (in some cases)
However, if your production line uses low-heat bonding steps, polyamide is easier to integrate without changing parameters.
6. Cost Considerations
Polyester Hot Melt Yarn is usually more affordable and widely available in bulk.
Polyamide Hot Melt Yarn tends to cost a bit more due to its elasticity and lower melting point properties.
✔️ For cost-sensitive projects, polyester may offer better value.
✔️ For comfort-driven applications, the premium of polyamide can be worth it.
Summary Table: Polyester vs. Polyamide Hot Melt Yarn
| Property | Polyamide (Nylon) | Polyester |
|---|---|---|
| Melting Point | 85°C – 110°C | 110°C – 150°C |
| Flexibility | High | Medium |
| Softness | Very soft | Firmer feel |
| Heat Resistance | Moderate | High |
| Best Use Cases | Seamless garments, stretch fabrics | Industrial fabrics, high-temp use |
| Fabric Match | Nylon, Lycra, Spandex | Polyester, Cotton blends |
| Price | Slightly higher | More economical |
Still not sure which yarn to choose?
Our experts at fiber-yarn.com can help match the perfect hot melt yarn to your application. Contact us today for samples, technical data, or custom support.
