Recycled 7D and 15D Hollow Conjugated Polyester Staple Fiber (PSF)
Keeps Its Shape: Doesn’t stretch, shrink, or warp; stays looking new even after years of use and washing.
Perfect for Blending: Mixes easily with cotton or wool to combine natural comfort with industrial strength.
20% Lighter: Hollow core provides maximum warmth and volume without the weight—ideal for cars and outdoor gear.
Stays Fresh: Naturally repels mold and bacteria, preventing odors and keeping products hygienic.
Brighter Colors: Absorbs ink perfectly for vibrant, fade-resistant prints and home decor.
PRODUCT DETAIL
In the modern textile and manufacturing landscape, sustainability is no longer an optional feature; it is a core industrial standard. Recycled 7D and 15D Hollow Conjugated Polyester Staple Fiber (PSF) has emerged as the definitive solution for brands that refuse to choose between environmental responsibility and mechanical performance. This specialized “Fill Stuffing” is engineered from post-consumer PET bottles and polyester waste, transforming recycled plastic into a high-tenacity material that rivals virgin polyester in every performance metric.
Produced within the advanced manufacturing centers of South East Asia and China, this recycled fiber is manufactured through high-precision polymerization and extrusion. By converting PET flakes into crimped, hollow filaments, manufacturers provide the global market with a resilient, hypoallergenic, and cost-effective stuffing that serves as the backbone for premium pillows, furniture, and toys.
Technical Breakdown: Choosing Between 7D and 15D Grades
The success of a product’s “feel” and durability depends largely on the choice of denier. In the world of recycled fiberfill, the 7D and 15D specifications represent the two pillars of industrial filling:
The 7D Specification for Softness 7 Denier (7D) fiber is a finer, thinner filament. It is the preferred choice for applications where a soft, silk-like hand-feel is required. When used in bed pillows or high-end apparel padding, 7D recycled fiber provides a “feather-touch” experience. Its fine structure allows it to conform easily to the shape of the head and neck, offering luxurious comfort without sacrificing support.
The 15D Specification for Support 15 Denier (15D) fiber is a thicker, more robust filament designed for high-density applications. It provides the “spring” and structural integrity needed for furniture cushions, mattresses, and large-scale stuffed toys. Because the 15D filament is stronger, it offers superior resilience under heavy weight, ensuring that sofa backs and seating pads do not flatten or “bottom out” over time.
The Power of Hollow Conjugated Technology
The “Hollow Conjugated” engineering is what separates premium recycled stuffing from basic solid fibers. Each filament is manufactured with a continuous air-core (Hollow) and a three-dimensional spiral crimp (Conjugate).
The hollow core acts as a microscopic thermal barrier, trapping air to provide exceptional warmth and insulation while significantly reducing the overall weight of the material. Simultaneously, the conjugate spiral acts as a permanent mechanical spring. Unlike standard straight fibers that can mat together, conjugate fibers interlock and push back against compression, ensuring the “bounce-back” memory that is the hallmark of high-quality recycled fiberfill.
Five Strategic Advantages of Recycled Polyester Fill Stuffing
For production directors and procurement managers, utilizing recycled 7D and 15D PSF offers five distinct technical advantages:
Dimensional Stability and Resilience Recycled polyester staple fiber does not warp. It neither stretches nor shrinks, and it possesses a resilience that natural fibers lack. This ensures that the final product—whether a luxury comforter or a decorative cushion—maintains its showroom-fresh appearance and loft through years of daily use and repeated laundering.
Superior Material Synergy This fiber can be effectively combined with other materials such as rayon, cotton, wool, or specialized binder fibers. This increases the quality of the final product and allows for a multiplicity of uses. Manufacturers often take advantage of the natural breathability of cotton casings while utilizing the high-tenacity durability of recycled polyester for the interior fill.
Lightweight Volume and Portability The hollow construction ensures that the material is 20% lighter than ordinary solid fiber. This lightweight nature is a critical advantage for the automotive and outdoor gear sectors, where reducing weight is essential for performance and fuel efficiency, while still providing maximum warmth retention.
Hygroscopic and Antimicrobial Protection Polyester naturally absorbs less moisture, making it an inhospitable environment for fungus, mold, and bacteria. This inhibits the generation of bad odors and protects the health of the end-user. For products used in the healthcare and hospitality industries, this moisture-wicking effect is a vital hygiene feature.
Enhanced Aesthetic and Color Retention Polyester fabrics and casings are known for having brighter and more durable colors and prints. Because the material absorbs inks so effectively, it remains the standard for the vibrant home decor and fashion markets, where visual appeal is just as important as the interior comfort of the filling.
Manufacturing Excellence: From PET Waste to High-Tenacity Fiber
The journey of Recycled 7D and 15D PSF begins with a rigorous polymerization process performed at high temperature and pressure. Post-consumer PET bottles are cleaned, shredded into high-purity flakes, and melted to form a molten polymer.
During the spinning and drawing process, the filaments are stretched to align the molecular structure, which is the key to achieving excellent tenacity. After the crimping stage provides the 3D conjugate shape, the fibers are often siliconized to create a “slick” and smooth finish. Finally, they are cut into staple lengths (usually 32mm to 76mm) and compressed into bales for global shipment. This ensures that the final stuffing is easy to open and exhibits high filling power in the factory.
Diverse Applications of Recycled PSF Fill
Because of its consistent quality and versatility, recycled 7D and 15D stuffing is found in almost every sector of the textile industry:
Bedding: The standard for pillows, blankets, comforters, and quilts where hypoallergenic safety and warmth are required.
Furniture: Providing the firm but comfortable padding for sofas, chair cushions, and upholstered headboards.
Toy Industry: The primary filling material for stuffed animals and dolls, providing a soft, safe, and durable fill for children’s products.
Automotive Interiors: Used in seat padding and headrests for its combination of support, lightweight nature, and fire-resistant properties.
Outdoor and Travel Gear: Filling for sleeping bags and camping pillows where moisture resistance is essential for survival in damp environments.
Conclusion: Sourcing High-Quality Recycled Fiber Globally
Recycled 7D and 15D Hollow Conjugated Polyester Staple Fiber represents the future of responsible manufacturing. By choosing high-quality regenerated fiber sourced from advanced hubs in South East Asia and China, brands can satisfy the growing consumer demand for eco-friendly products without sacrificing the “feather touch” and “bounce-back” resilience of virgin materials.
Choosing high-tenacity recycled PSF ensures a product that is hypoallergenic, machine-washable, and incredibly durable. It is the cost-effective and practical choice for any industry that values consistency, safety, and a commitment to a cleaner planet.
Technical Parameter
Polyester Staple Fiber used in Non-woven Industry
| Luster | Denier | Cross Section | End-Use |
| SD | 1.5, 1.7, 2, 3, 4, 6 & 15 | Solid | Nonwoven Interlining, Sanitary Material, Microfiber and Thermal Bonding |
| FBR (Black) | 1.5, 1.7 & 3 | Solid | Needlepunch, Resin Bonding & Fiberfill |
| SD | 1.5 & 4.5 | Solid | Dyeable Fabric & High-Pile |
| SD | 6, 8 & 15 | Hollow and Hollow-Siliconized | Resin Bonding, Needlepunch, Fiberfill, Flame Retardant Fabric, Anti Bacteria & Platinum Photon Fiber |
| SD, BR,OBBR | 0.7, 1.1, 1.2, 1.4, 2.0, 6, 8, 12, 15 & 20 | Solid | Low Pilling, Knitting, Fiberfill, Thermal Bonding, Needlepunch, Infrared Fiber & Resin Bonding |
| SD | 2, 3, 4.5, 7, 12 & 15 | Hollow Conjugate | Resin Bonding, Needlepunch & Fiberfill |
| SD | 7 | Hollow Conjugate | Anti-Bacteria |
Polyester Staple Fiber as per Direct End Use
| Type | Denier | Section | End Use |
| Anti Pilling | 1.4, 1.5, 2, 2.5 & 3 | Solid & Hollow | Sportswear, Underwear, Casual wear |
| Bamboo Charcoal | 1.5, 1.7 & 6 | Hollow | Bedding, Shoe pad, Cushion, Thermal Sock |
| Spinning Use | 1.3, 1.4, 1.5 & 1.7 1.5 | Solid Hollow | Sportwear, Casual Wear, Underwear |
| Dopedyed Black | 1.5, 2 & 3 | Solid | Nonwoven, Casual wear, Sport wear, Underwear |
| Flame Retardant | 1.4 | Solid | Home, Comfort & Clothing textiles |
| Micro Fiber | 0.8 – 1.0 | Solid | Cloth & Fleece |
| High Tenacity | 1.2 | Solid | Yarn, Cloth & Water transport |
| High Void Conjugate | 3, 7, 12 & 15 | Hollow | Toy Padding, Badding, Furniture Cushion, etc |
| Regular Fiber | 2, 2.5, 3, 6 & 15 | Solid | Nonwoven, Filter medics, Padding, etc. |
FAQ
1. What do you offer?
We supply a comprehensive range of fibers, including recycled hollow conjugated (both siliconized and non-siliconized) polyester staple fiber, hollow fiber, microfiber, virgin polyester staple fiber, and low-melt fiber.
2. What is it used for?
Our fibers are versatile and widely utilized across both the filling and non-woven industries, providing essential loft, durability, and texture for various consumer and industrial applications.
3. Are you a factory or a trading company?
We are primarily a manufacturer specializing in polyester staple fiber with years of industry expertise. To better serve our clients, we also operate a dedicated trading division that allows us to act as a one-stop solution provider.
In addition to our own fiber production, we source high-quality textile components (such as yarn and low-melt fibers) and finished goods (including foam, pillows, cushions, toys, and down/feather products) to ensure our customers have access to a comprehensive supply chain.
4. Where is your factory location?
To maintain a robust and flexible global supply chain, our manufacturing facilities are strategically located throughout Asia, specifically in Vietnam, China, Malaysia, Thailand, and Indonesia. If you would like to visit one of our sites, please contact your sales representative, and we will be happy to arrange transportation for you.
5. Can you accept free sample?
Yes, we provide free hand samples for quantities under 1 kilogram. Once a price is confirmed, we can prepare and dispatch your sample within 2–3 business days. Please note that while the sample is free, the freight costs are the responsibility of the client.
6. Can you provide ODM service?
Absolutely. We specialize in ODM (Original Design Manufacturing). This means we can customize the material composition, dimensions, quantity, packaging, and branding to meet your specific requirements. Your logo and unique specifications will be integrated into the final product.
7. How about your quality? What’s the minimum order Quantity (MOQ)?
We invite you to place a trial order to experience our quality firsthand. Our standard MOQ is 23,000 kilograms per order.
Regarding pricing, we maintain a no-bargain policy. We believe in transparency and efficiency, so we provide our most competitive offer upfront to save you time and ensure a straightforward procurement process.
8. Can I mix different items in one order?
Yes, for your convenience, we allow for a maximum of two different items to be mixed within a single container.
9. How can you guarantee the product quality?
Quality is the cornerstone of our business. We employ an experienced QC team that monitors every stage of production, from raw material inspection to the final manufacturing process. We utilize a range of advanced testing instruments to ensure our fibers meet strict industry standards.
Our business philosophy is simple: We aim to serve one customer 1,000 times, rather than 1,000 customers once. We prioritize long-term partnerships built on consistent excellence.
10. What’s the payment terms?
L/C at sight, 30% TT in advance are mostly accepted; other terms shall be negotiable by both sides
For more information, please feel free to contact :
Tony Tan
Mobile number: +84 90 466 5251 (Whatsapp/Wechat/Viber/Signal)
