Hollow Non-Conjugated Mechanical Crimp Fiber
Strong Grip: The “saw-tooth” mechanical crimp ensures fibers interlock perfectly for spinning and high-density materials.
Built for Durability: The premier choice for spinning yarns, geotextiles, and heavy-duty padding.
Global Supply: Produced through VNPOLYFIBER’s advanced facilities in South East Asia and China.
PRODUCT DETAIL
What is Hollow Non-Conjugated Mechanical Crimp Fiber?
In the synthetic fiber industry, the method used to create “loft” determines how a material will behave under pressure. Hollow Non-Conjugated Mechanical Crimp fiber is a high-performance Polyester Staple Fiber (PSF) that utilizes a mechanical crimping process rather than chemical or heat-induced conjugate spiraling. This results in a “saw-tooth” or zig-zag pattern that provides excellent interlocking properties, making it the premier choice for spinning yarns, geotextiles, and high-density padding.
Produced by VNPOLYFIBER through advanced facilities in South East Asia and China, this fiber can be made directly from PTA and MEG or high-quality PET Chips, as well as from PET/Polyester waste and post-consumer PET bottles.
1. The Technical Difference: Mechanical Crimp vs. Conjugate
Understanding the crimp style is essential for factory managers and production directors:
Mechanical Crimp Structure: During post-treatment, the fiber is forced through a “stuffer box” to create a zig-zag or saw-tooth pattern. This differs from the 3D spiral (helical) shape of conjugate fibers. Mechanical crimp provides superior mixability and mix-retention, which is critical when blending with natural fibers like cotton or wool.
Non-Conjugated Profile: Because the fiber is not bi-component, it has a more uniform cross-section. This leads to higher tenacity and consistency, which is vital for spinning into yarns or creating high-tensile geotextiles.
Hollow Core Architecture: Like all hollow fibers, each filament contains a void in its center. This design allows for a higher loft factor (typically around 9 to 12) while reducing the material weight by 20% compared to solid fibers.
2. Manufacturing and Quality at VNPOLYFIBER
The journey of Hollow Non-Conjugated Mechanical Crimp PSF at VNPOLYFIBER involves a strict quality-controlled process performed at high temperature and pressure:
Polymerization: Virgin PTA and MEG or recycled PET flakes are polymerized to ensure molecular strength.
Extrusion and Drawing: The polymer is extruded into continuous filaments and then subjected to directional stretching. This ratio is carefully controlled to optimize the mechanical properties of the fibers.
Mechanical Crimping: The filaments pass through a thread-lowering mechanism and a stuffer box to establish the predetermined saw-tooth density.
Final Cut: After heat-setting, the polymer becomes staple fibers when cut short into lengths ranging from 32mm up to 102mm, depending on the end-use.
3. The 5 Strategic Advantages of Mechanical Crimp PSF
Whether you are using virgin or recycled materials, this fiber offers five key advantages for your production line:
Does Not Warp: It neither stretches nor shrinks. The mechanical crimp provides a resiliency that prevents the final fabric from wrinkling or losing its shape after repeated compression.
Excellent Material Synergy: It is designed to blend perfectly with other materials such as rayon, cotton, wool, or viscose. This increases the quality of the final product, allowing a company to take advantage of the naturalness of cotton combined with the durability of polyester.
Lightweight Strength: The hollow construction makes the fiber light and soft, but this does not prevent it from being a solid and durable material suitable for industrial use.
Hygroscopic and Antimicrobial Protection: It repels fungus, mold, and bacteria. This not only increases its durability but prevents the generation of bad odors, which is a key advantage for home textiles.
Superior Ink Absorption: Polyester fibers usually have brighter and more durable colors. For this reason, textiles for shirts, blouses, and dresses are composed mostly of polyester.
4. Industrial and Consumer Applications
Because of its high tenacity and interlocking crimp, this fiber is favored across several high-growth industries:
Spinning and Textiles: Ideal for twisting into yarn after blending with cotton or wool to create high-grade tweeds, casual wear, and thermal underwear.
Geotextiles and Construction: Fabricated into non-woven fabrics through compression for use in civil engineering, road construction, and acoustic felts.
Bedding and Furniture: Used as a reliable stuffing material for sofas, quilts, pillows, and cushions, providing excellent filling power and high bulkiness.
Automotive Interiors: Used for seat padding, headrests, and speaker felts due to its moisture wicking and breathability.
Conclusion: Supply Chain Support with VNPOLYFIBER
Sourcing the right Hollow Non-Conjugated Mechanical Crimp fiber requires technical expertise. At VNPOLYFIBER, we support your sourcing by providing the best QC team and extensive expertise in the supply chain across Vietnam, China, Malaysia, Thailand and Indonesia. We ensure that every bale meets GRS and OEKO-TEX standards, offering a high-resilience, eco-friendly product at a very competitive price.
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)
