Understanding the Basics of Acrylic Yarn
Acrylic yarn has become one of the most widely used synthetic fibers in the global carpet manufacturing industry, thanks to its wool-like softness, vibrant color retention, and affordability. In countries like Iran, a hub for machine-made carpets, acrylic is the standard material for producing prayer rugs, mosque carpets, and bulk commercial flooring. However, there’s a crucial distinction that many buyers and even some retailers overlook: heat-set vs. non-heat-set acrylic yarn. This difference significantly affects the carpet’s texture, durability, appearance, and longevity.
What Is Heat-Set Acrylic Yarn?
Heat-set yarn is created by twisting the acrylic fibers and then exposing them to high-temperature steam or dry heat in a specialized chamber. This thermal stabilization “locks in” the twist of the fibers, making them resilient, uniform, and more stable.
Advantages of Heat-Set Acrylic Yarn:
- Improved resilience and texture retention
- Reduced shedding and fiber breakage
- Soft, wool-like feel and high-end appearance
- Better resistance to dirt and foot traffic
- Enhanced durability for long-term use
Used in premium carpets like 1200-reed and 700-reed mosque rugs produced by companies such as Pamchal Carpet in Kashan.
What Is Non-Heat-Set Acrylic Yarn?
In contrast, non-heat-set yarn is twisted and woven without the thermal processing. While it may look similar at first glance, over time these fibers loosen, fuzz, and shed. The twist is not stabilized, which means carpets lose shape, look uneven, and become harder to clean.
Drawbacks of Non-Heat-Set Yarn:
- Higher shedding, especially in the first few months
- Reduced softness and irregular pile surface
- Less resistance to vacuuming and abrasion
- Lower lifespan and quicker aging of the carpet
Application in Prayer Carpets and Commercial Use
For mosques, prayer halls, schools, and public institutions, the demand for carpet durability is high. Heat-set acrylic yarn carpets are ideal for these environments because:
- They maintain appearance even after daily prayers
- Fibers don’t flatten under pressure from knees and feet
- They resist color fading even under sunlight or heavy washing
- They maintain hygiene as they’re less likely to trap dust
Mosque carpets made from non-heat-set yarn often need replacement within 1–2 years, while heat-set yarn carpets can last 5+ years with regular cleaning.
Why the Difference Matters for Exporters and Bulk Buyers
When sourcing machine-made carpets from Iran for export, especially in bulk, choosing the correct yarn type can determine customer satisfaction.
Buyers from the Gulf, Africa, and Southeast Asia, particularly those furnishing mosques, hotels, and community centers, should always verify the yarn type before confirming an order.
Questions to Ask Your Supplier:
- Is the yarn heat-set or non-heat-set?
- What is the estimated shedding rate over the first 3 months?
- Can you provide a yarn twist test result?
- Is the carpet suitable for high-traffic or sacred spaces?
Pamchal’s Use of Heat-Set Yarn in Premium Rugs
Pamchal Carpet, based in Kashan, is one of the leading exporters of machine-made mosque carpets. They specialize in:
- 700 and 1200 Reed Acrylic Rugs using high-quality heat-set yarn
- Custom Qibla-aligned layout design for mosques
- Durable and low-maintenance pile structure
- Exporting to Saudi Arabia, Iraq, UAE, and African countries
By using heat-set acrylic yarn, Pamchal ensures consistent color, soft texture, and durability even in harsh environments.
Technical Comparison Table
| Feature | Heat-Set Acrylic Yarn | Non-Heat-Set Acrylic Yarn |
| Durability | 5–7 years | 1–2 years |
| Shedding | Low | High |
| Color Retention | Excellent | Moderate |
| Maintenance | Easy | Requires frequent care |
| Visual Uniformity | High-end | Uneven over time |
| Ideal Use Cases | Mosques, hotels, exports | Temporary or budget use |
Final Thoughts – The Smart Choice
If you’re looking for quality, reliability, and customer satisfaction, heat-set acrylic yarn is the smart investment. While the upfront cost may be higher, the reduced maintenance and extended carpet life make it the ideal choice for:
- Mosque builders
- Exporters
- Commercial designers
- Religious institutions
Always ask for technical specifications when ordering Iranian carpets, and remember, the yarn type matters more than you think.