Polyester Tying Cord

Our Polyester Tying Cord is constructed from high-tenacity continuous filament polyester fibers, braided into a conformable flat or round profile that ensures superior knot-holding characteristics. The polyester material provides inherent resistance to moisture, mildew, and most chemicals, while maintaining flexibility across a broad temperature range.

Unlike conventional nylon alternatives, polyester exhibits significantly lower stretch when wet, making it the preferred choice for applications requiring dimensional stability in humid or variable environments.

The cord’s soft-textured fibers prevent skin irritation during extended handling, enhancing workplace safety and user comfort.

SIDA offers three professional finish formulations to optimize performance for specific applications:

Our tying cord meets stringent military and commercial specifications, including:

Values based on military specification A-A-52081 and industry standard calculations

Note:The product specifications provided are for reference purposes only. Please refer to the actual product for final specifications. We also offer various sizes and thicknesses to meet your specific needs. For further customization, please contact us.

Primary Use: Tying end windings and coil binding during motor repair and manufacturing

Polyester tying cord is extensively used in electric motor rewinding operations due to its excellent compatibility with insulating varnishes and low elongation properties (less than 30% stretch). The cord’s high conformability allows for tight, secure bundling of copper windings without cutting into insulation. Its 130°C temperature rating ensures performance during varnish curing processes and continuous operation. The synthetic rubber finish (Finish C) provides vibration resistance critical for running motors.

Best Practice: Apply with square knots or clove hitches; coat with compatible varnish after tying for permanent bonding.

Primary Use: MIL-SPEC cable lacing in aircraft and military equipment

Meeting MIL-T-43435 requirements, our polyester lacing tape replaces cable ties in critical aerospace applications where long-term reliability is mandatory.

Unlike plastic cable ties that become brittle and lose plasticizers over time, polyester cord maintains flexibility and strength across decades of service.

The flat braid design eliminates sharp edges that could damage wire insulation or injure technicians during maintenance.

Certification: Available with manufacturer’s certification to A-A-52081-B, -C, or -E specifications.

Primary Use: General-purpose tying in manufacturing, construction, and marine environments

For securing shade cloths, awnings, and tarps, the UV-resistant polyester construction prevents degradation from sun exposure.

The cord’s low water absorption (<1%) ensures no strength loss when wet, making it superior to nylon for marine applications.

Use 4-6mm diameter cord for heavy-duty tie-downs with breaking strengths exceeding 250 lbs.

Advantage: No “memory” effect; knots remain secure without loosening under cyclic loading.

Primary Use: High-strength craft cord, wind chime restringing, jewelry making

The 1-2mm diameter range offers a smooth, consistent texture ideal for detailed craft work.

Wax finish provides excellent thread control for fly tying and precision knotting.

Available in multiple colors for organization and aesthetic purposes.

Each production batch undergoes:

Q1: What is the difference between polyester and nylon tying cord? A: Polyester has lower stretch (30% vs. nylon’s 40-50%) and maintains strength when wet, while nylon loses 10-15% strength when saturated. Polyester also has better UV resistance and is preferred for electrical applications due to superior dielectric properties.

Q2: Can I use this cord for outdoor applications? A: Yes. The UV-stabilized polyester construction resists sun degradation for 5+ years, and the material is inherently resistant to rot and mildew. For marine use, we recommend the uncoated Finish A for maximum chemical resistance.

Q3: How do I choose the right diameter? A: For electrical motor winding: 1.5-3mm. For aerospace cable harnesses: 2-3mm flat braid. For general industrial tying: 4-6mm. For crafts: 1-2mm.

Q4: Is the cord compatible with all varnishes? A: Polyester is compatible with most epoxy, polyester, and silicone varnishes used in motor winding. Wax finish may interfere with some coatings; use uncoated Finish A for maximum compatibility.

Q5: What knot strength can I expect? A: Properly tied knots achieve 60-70% of rated break strength. For critical applications, use spliced loops or add safety margins. Synthetic rubber finish improves knot security by 15-20%.

Q6: Do you provide certifications for aerospace orders? A: Yes. Manufacturer’s certification to A-A-52081 specifications is available for $15.00 per spool, including conformance documentation and traceability.