Product Category: Hybrid Weft Systems
Material Basis: 100% Remy or Virgin-Base Human Hair
The Flat Weft is an engineered hair extension component designed to bridge the gap between high-volume machine wefts and low-profile hand-tied wefts. By utilizing advanced polyurethane (PU) lamination, this product achieves a structural thickness that is significantly lower than traditional sewn tracks.
1. Physical Dimensions & Track Architecture
The primary value proposition of the Flat Weft is its minimized physical footprint at the attachment point.
- Track Thickness: Measured at the center of the bond, the track maintains a profile of 0.8mm – 1.0mm.
- Track Height: The vertical height of the silk base is standardized at 3.5mm – 4.0mm.
- Return Hair (The Beard): 0mm.
- Mechanical Advantage: Unlike machine wefts that require a 10mm – 15mm fold-over, the Flat Weft utilizes a flush-cut top, removing all mechanical irritation from the hair cuticle interface.
2. Manufacturing Material Specifications
The integrity of the Flat Weft depends on a triple-layer lamination process that ensures the hair remains secure under high tension.
| Component | Material Specification | Purpose |
| Bonding Agent | Medical-Grade Polyurethane (PU) | Encapsulates the hair cortex to prevent shedding. |
| Structural Base | High-Density Silk or Micro-Lace | Provides the substrate for the double-stitch reinforcement. |
| Reinforcement | Polyester Monofilament Thread | Secures the track against the weight of the hair (tensile strength). |
3. Mechanical Performance Indicators
- Cut-to-Width Capability: Due to the internal PU resin bond, the track can be cut at any point without the risk of unraveling.
- Customization: This eliminates the need for adhesive sealing after resizing for the client’s head.
- Heat Resistance: The PU bond is stabilized to withstand temperatures up to 180°C.
- Styling Safety: This allows for standard thermal styling and salon-grade blow-drying without bond degradation.
- Moisture Management: The silk-base is treated for low porosity, preventing the track from retaining water, which reduces drying time.
4. B2B Installation Parameters
To maintain the structural warranty of the Flat Weft, the following installation parameters are recommended for professional salon use:
- Attachment Method: Optimized for Beaded Row or Hidden Bead techniques.
- Weight Distribution: Due to its thin profile, the Flat Weft is ideal for “Double Stacking” (placing two wefts on a single row) to achieve high density.
- Stacking Limit: Recommended total row thickness should not exceed 2.5mm to protect the natural root.
- Removal Cycle: Recommended move-up every 6-8 weeks to ensure the natural hair follicle is not stressed by the weight of the weft.
Conclusion
The Flat Weft is a high-precision tool for the modern stylist. By removing the “Return Hair” and reducing the track thickness by nearly 45% compared to standard machine wefts, it provides a high-performance solution for clients requiring maximum invisibility.
At Linwen Hair, we ensure that every batch of Flat Wefts meets these exact micron-level specifications, providing B2B wholesalers with the consistency required for large-scale distribution.
Contact us to get the latest quote.