Polyester Mylar Tape For Cable Wrapping
 | Polyester Mylar Tape For Cable Wrapping
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PVC Electrical Tape Company is a manufacturer of polyester mylar tape for cable wrapping, made for cable core wrapping, binding, and separator use in wire and cable production. The tape uses PET/Mylar polyester film with stable thickness, clean slit edges, low moisture absorption, and controlled winding tension. It is supplied in slitted rolls, pads, spools, or jumbo rolls for communication cables, control cables, data cables, coaxial cables, and power cable structures.
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Benefits
- Supports cable core wrapping and binding before sheath extrusion.
- Helps maintain cable roundness and reduce loose conductor movement.
- PET/Mylar film offers typical tensile strength of >=150MPa in MD.
- Controlled elongation, typically >=50%, helps maintain wrapping tension.
- Works as a Mylar separator tape for cable insulation separation.
- Separates conductor groups, fillers, shielding layers, and jacket process areas.
- Low moisture absorption, typically <=0.8%, supports stable roll storage.
- Clean slit edges help reduce curling, tearing, and wrapping wrinkles.
- Slitting tolerance can reach +/-0.2mm for narrow rolls after confirmation.
- Controlled roll hardness helps reduce telescoping and unstable unwinding.
- Sample roll testing helps confirm real machine performance before bulk use.
What Should Be Checked Before Using PET/Mylar Tape for Cable Core Wrapping?
Before PET/Mylar film is approved for cable core wrapping, it should be tested on the actual cable structure rather than selected only by thickness. A useful sample check normally includes film thickness, slit width, overlap ratio, tensile strength, edge condition, and roll unwinding behavior. During the cable line test, the tape should wrap flat without edge curling, loose turns, visible wrinkles, or slipping between the conductor group, filler, shielding layer, and outer jacket process. Sheath extrusion observation is also important because unstable wrapping may show movement, uneven overlap, or separator displacement after heat and pressure.
Product Overview
This PET film cable wrapping tape is produced from BOPET polyester film and is used inside cable construction, where stable wrapping is more important than surface adhesion. It is not ordinary packaging tape or a general protective film. In cable production, the wrapping film helps hold the cable core in shape, reduces loose movement between conductor groups, and creates a clean separator layer before filling, shielding, or sheath extrusion.
Film thickness should be selected according to the actual cable structure. For light communication cables, data cables, and smaller conductor groups, 12um, 15um, or 19um film is often chosen to keep the cable build-up low. For stronger cable core binding, 25um, 36um, and 50um grades give better mechanical support during twisting and wrapping. When the design needs a thicker barrier or stronger electrical separation, 75um and 100um film can be checked with sample rolls before production approval.
PVC Electrical Tape Company also supplies slitted Mylar tape for cable production in narrow rolls, pads, spools, and jumbo rolls. Roll width can be adjusted from 5mm to 1000mm, and roll length is commonly set from 500m to 6000m depending on film thickness and winding form. During batch sample checks, we pay attention to slit edge condition, roll hardness, winding tension, telescoping, wrinkles, and unwind stability. These details directly affect whether the tape runs smoothly on cable wrapping machines.
Applications
- Communication cable core wrapping with thin PET film separation.
- Control cable binding before shielding or jacket extrusion.
- Data cable and network cable internal separator wrapping.
- Coaxial cable insulation separation and barrier wrapping.
- Power cable filler, conductor group, and shielding layer separation.
- PET core wrap tape for cable assembly and cable construction.
- Winding wire separator wrapping where thin polyester film insulation is required.
- Slitted roll supply for cable wrapping machines and rewinding lines.
Technical Data Sheet
Item | Typical Value |
Product type | PET/Mylar polyester film cable wrapping tape |
Film material | BOPET polyester film |
Common film thickness | 12um, 15um, 19um, 25um, 36um, 50um, 75um, 100um |
Thickness tolerance | +/-5% typical factory test range |
Slitted roll width | 5mm-1000mm, can be adjusted after sample confirmation |
Jumbo roll width | 300mm-1000mm typical reference value |
Roll length | 500m-6000m based on film thickness and roll form |
Core ID | 52mm, 76mm, 152mm available by production requirement |
Tensile strength MD | >=150MPa typical factory test range |
Elongation MD | >=50% typical reference value |
Dielectric strength | >=100kV/mm typical reference value |
Moisture absorption | <=0.8% typical reference value |
Heat shrinkage | <=3% at 150C x 30min typical sample check |
Slitting tolerance | +/-0.2mm for narrow rolls, based on confirmed width |
Roll edge condition | Clean slit edge, low burr, low edge curling |
Winding quality | Controlled roll hardness and stable unwind tension |
Sample roll observation | Check overlap consistency, telescoping, wrinkles, and sheath extrusion stability |
How Does Slitting and Winding Tension Affect Cable Wrapping Stability?
Slitting and winding tension have a direct effect on how this polyester cable binding tape runs on cable wrapping equipment. If the roll is wound too loosely, it may telescope, shift sideways, or unwind unevenly during continuous wrapping. If the roll is wound with excessive tension, thin polyester film may stretch, wrinkle, or create feeding resistance. A stable roll should keep a flat surface, clean edge, and consistent overlap around the cable core. For this reason, trial roll validation should include unwind tension, roll hardness, slit edge quality, wrinkle control, and wrapping performance under the actual line speed.
FAQ
Is this polyester Mylar tape adhesive or non-adhesive?
It is mainly supplied as PET/Mylar film tape for cable wrapping and separator use. Non-adhesive film is common, while special structures can be reviewed after sample confirmation.
Which thickness is suitable for cable core binding?
Light cable structures often use 12um-25um film. Stronger binding or separator needs may use 36um-100um depending on cable diameter, overlap ratio, and processing speed.
Can the tape be supplied in narrow slitted rolls?
Yes. PVC Electrical Tape Company can supply slitted rolls, pads, spools, and jumbo rolls. Width, length, and core ID are confirmed according to the cable wrapping machine.
Why is sample testing needed before production?
Sample testing helps confirm wrapping tightness, unwind stability, slit edge quality, overlap consistency, telescoping risk, wrinkles, and sheath extrusion observation under real cable production conditions.