Core-Shell Coated Toothbrush Filament Extrusion & Drawing Line Solution
For continuous production of premium composite toothbrush filaments
Premium PBT Two-Color Core-Shell Coated Toothbrush Filament Production
This solution is tailored for high-end PBT bi-color sheath-core coated brush filament production for South Korean listed enterprises., designed around 0.18mm diameter, 5:5 core-shell ratio, stable resilience, excellent straightness, and low shrinkage.
NLY Monofilament Extrusion Machinery · Since 1989
Key Customer Requirements
The project focuses on five key filament performance requirements for stable toothbrush production: straightness, resilience, roundness, diameter uniformity, and low shrinkage.
Technical Solutions
The line combines stable core-shell extrusion, controlled multi-stage drawing, progressive heat setting, and automatic winding to improve filament consistency and long-term production stability.
Independent Plasticization & Precision Melt Metering with Dual Extruders
Independent extrusion and metering systems process the two PBT colors separately before composite extrusion, supporting stable 5:5 core-shell formation.
- Independent Core / Skin Plasticization
- Precision Melt Metering & 5:5 Ratio Control
- Stable Two-Color PBT Processing
![Twin-Screw Extrusion & Plasticization Unit](https://nlyextruder.com/wp-content/uploads/2026/09/4-3-5.jpg")
Dedicated Core-Shell Composite Die & Pressure-Balanced Flow Design
A dedicated composite die controls melt flow and pressure balance to maintain core concentricity and uniform skin coverage.
- Dedicated Core-Shell Flow Channels
- Pressure-Balanced Melt Distribution
- Die Matched to Material, Filament Count & Output
Two-Stage Drawing & Two-Stage Heat Setting
Multi-stage drawing and progressive heat setting stabilize filament orientation, dimensions, and shrinkage before winding.
- Approximately 90% of Target Shrinkage Addressed In-Line
- Reduced Post-Process Dimensional Change
- Hot-Water Setting + Hot-Air Oven
Fully Automatic Frame-Type Winding
Low-tension automatic winding forms stable packages while reducing deformation and operator-related variation.
- Stable Low-Tension Winding
- Automatic Package Formation
- Consistent Long-Term Production
![Fully Automatic Large-Package Winding System](https://nlyextruder.com/wp-content/uploads/2026/09/4-3-4.jpg")
Complete Line Configuration & Process Flow
A continuous production system integrating extrusion, melt metering, core-shell die, cooling, drawing, heat setting, automatic winding, and centralized electrical control.
Production Line in Operation · Product Video
Real-world NLY production video showing continuous plastic filament drawing and coordinated line operation.
If the video does not play directly, please click Watch on YouTube ›
Manufacturing · Testing · Shipment Process
Six controlled stages from technical confirmation to installation and production handover.
Technical Confirmation & Project Kickoff
Confirm material, colors, core-shell ratio, filament diameter, filament count, output, winding format, factory conditions, and acceptance standards.
Equipment Manufacturing & Quality Inspection
Complete equipment machining, composite die fabrication, assembly, electrical control, and inspection of key components.
Factory Installation & No-Load Commissioning
Check motor rotation, temperature control, drive synchronization, alarms, safety interlocks, and complete line control before material testing.
Trial Run & Sample Confirmation
Verify extrusion, core-shell structure, diameter stability, surface quality, straightness, resilience, and shrinkage using the confirmed materials.
Acceptance, Packaging & Shipment
After acceptance, equipment is protected, packed, documented, and prepared for controlled transportation and installation.
On-Site Installation, Commissioning & Production Handover
Provide installation guidance, commissioning, process training, and initial production support to establish stable continuous operation.
Typical Applications
PBT two-color core-shell filaments for premium oral-care applications requiring consistent diameter, straightness, resilience, roundness, and low shrinkage.
Toothbrush monofilament
Uniform diameter and stable resilience for consistent manual toothbrush production.
Electric Toothbrush Filaments
Low shrinkage and good straightness for high-frequency vibrating brush heads.
![Oral-Care Filaments](https://nlyextruder.com/wp-content/uploads/2026/09/ai111-e1789885464228.jpg")
Manual Toothbrush Filaments
Stable two-color appearance with balanced touch and cleaning performance.
The solution integrates dual extrusion, 5:5 precision metering, a dedicated core-shell die, multi-stage drawing, heat setting, and automatic frame winding for stable production of 0.18 mm PBT two-color core-shell toothbrush filaments.
Final process parameters are optimized to the confirmed materials, samples, filament count, and output target for stable long-term continuous production.
Customized Solutions for Your Toothbrush Filament Project
Over 37 years of monofilament extrusion machinery manufacturing experience · One-stop service from process design and equipment manufacturing to on-site commissioning. Contact us for consultation.
