Pick polyester nonwoven tape by its power-cable layer role. Polyester non woven tape for cable should be specified by its exact layer position, not by fiber name alone. In a power cable, a nonwoven wrap may bind, separate, cushion or support processing, while electrical, flame-retardant and water-blocking duties need separate evidence.

Where Polyester Non Woven Tape for Cable Fits in a Power Cable

Start by marking the tape on the cable cross-section, identifying adjacent materials and naming its primary duty. Depending on the design, a nonwoven may separate conductor from insulation, bind assembled insulated cores, or provide bedding before another component. These are possible positions, not universal rules.

The published construction of the SAB S 910 P power supply cable, for example, lists a nonwoven wrapping between its TPE insulation and PUR sheath. This confirms a real intermediate layer, but does not qualify the same tape for every voltage class, insulation compound or process.

• Conductor or insulation interface: define whether the tape is a separator and whether the cable design assigns any electrical requirement to that position.
• Laid-up core: state whether the wrap must hold the core geometry during handling and downstream extrusion.
• Beneath another cable component: define the required bedding, separation or cushioning role and the acceptable radial build.

Separate Polyester Material Properties from Special Functions

“Polyester” identifies the fiber family and “nonwoven” describes a fibrous sheet. Neither term proves that a tape is electrically insulating, semi-conductive, flame-retardant, low-smoke zero-halogen or water-blocking. Those functions depend on the complete construction and require grade-specific evidence.

This distinction is important when reviewing the Chaowang non-woven tape range. The category contains separately named binding, flame-retardant, reinforced and semi-conductive families. A standard polyester binding grade should not inherit a special claim from another family simply because both are nonwovens.

Water blocking is also a separate duty. A fibrous polyester base does not swell automatically. Where the drawing calls for longitudinal water migration control, review a purpose-designed product such as CW-5 non-woven water-blocking tape and review its swelling data. The related water-blocking tape specification guide explains that selection path in more detail.

Likewise, “adhesive” in a chemically bonded nonwoven may refer to binder used to form the web. It does not automatically mean that the delivered roll is a pressure-sensitive or self-adhesive tape. If peel adhesion, release liner or tack is required, specify and verify those properties separately.

Compare Polyester Non Woven Cable Tape Specifications Correctly

Compare mass per unit area, thickness, tensile strength and elongation as a set. Lower basis weight does not alone predict tensile performance or processing stability. Read thickness against both the permitted radial build and the pressure used during measurement.

The public CW-1 non-woven binding tape page identifies its composition as 100% polyester fiber and adhesive. Its listed grades, CW-1-20 through CW-1-80, publish the following span:

• Mass per unit area: from 20 ± 4 g/m² to 80 ± 5 g/m² across the listed grades.
• Thickness: from 0.14 ± 0.03 mm to 0.31 ± 0.04 mm.
• Minimum tensile strength: from 15 N/cm to 60 N/cm.
• Minimum elongation: 10% for CW-1-20 and 12% for the other listed grades.

These are published CW-1 values, not a universal specification for every polyester nonwoven. Confirm the exact offered grade and current datasheet before purchasing. The page cites ISO 9073 methods: ISO 9073-1:2023 covers mass per unit area, ISO 9073-2:1995 covers thickness under specified pressure, and ISO 9073-3:2023 covers tensile strength and elongation using a strip method. ISO 9073-3 includes 25 mm and 50 mm specimen options, so values from different specimen widths or units should not be compared without normalization.

A test-method reference explains how a property is measured; it is not an ISO product certification. Thermal figures also require context. A short exposure value used to discuss processing stability must not be presented as the continuous operating-temperature rating of the finished power cable.

Set the Validation Boundary for Non Woven Tape for Power Cable

Material data supports screening, but approval belongs to the intended cable and process. Check roll width, core dimensions, outside diameter and winding format against the equipment. During a representative trial, record unwind behavior, edge condition, web breaks, wrinkles, overlap and cable-core geometry. Use the cable maker’s normal process settings.

Next, inspect the adjacent materials and downstream process. Confirm that the tape does not create unacceptable build, movement, contamination or separation problems. Finally, run the finished-cable tests required by the applicable cable design, customer specification and market. A passing tape tensile test cannot prove electrical, mechanical, fire or water performance of the complete cable.

1. Mark the tape layer, adjacent materials and primary function on the drawing.
2. Select the functional family, then compare grade-specific values using common methods and units.
3. Define roll geometry and process-relevant acceptance checks.
4. Request a representative sample and document the production trial.
5. Approve the material only after the applicable finished-cable validation is complete.

For detailed binding-grade trial questions, use the CW-1 cable-core binding checklist rather than treating a material table as the complete approval plan.

Frequently Asked Questions

Is polyester non woven tape the same as polyester film tape?

No. A nonwoven is a fibrous web, while polyester film is a continuous film. Their thickness, porosity, flexibility, surface and processing behavior differ. They should not be substituted solely because both use polyester; follow the cable drawing and validate the selected construction.

Where is non woven tape used in a power cable?

Possible positions include a separator at a conductor or insulation interface, a binding wrap around a laid-up core, or an intermediate bedding or separation layer. The correct position and function must come from the specific cable design rather than a generic application list.

Is every white polyester nonwoven electrically insulating?

No. Colour and fiber type are not sufficient electrical evidence. If the layer has an electrical requirement, specify the relevant property, units, test method and acceptance limit, then verify the exact grade documentation and complete-cable design.

Does a higher basis weight always mean a stronger tape?

No. Basis weight measures mass per unit area. Strength also depends on fiber, web formation, bonding, direction and test conditions. Compare the stated tensile result and elongation using the same procedure instead of using g/m² as a strength shortcut.

Is chemically bonded polyester nonwoven self-adhesive?

Not necessarily. Chemical bonding can use adhesive as an internal binder to hold the fibers together. Pressure-sensitive adhesion is a separate finished-tape feature that requires its own construction and performance data.

Can CW-1 replace water-blocking or semi-conductive tape?

No automatic substitution should be made. CW-1 is presented as a polyester non-woven binding tape. Water swelling and controlled electrical resistance are separate functions that require the appropriate product family, current data and cable-level validation.

To review polyester non woven tape for cable, send Jiangsu Chaowang New Material the power-cable layer drawing, tape function, required physical data, roll dimensions and validation requirements. Consult the current datasheet and request a representative sample before production approval.