PET Braided Network Half-Rolling Sleeve
PET Braided Network Half-Rolling Sleeve is the split, self-wrapping member of the PET braid family: it closes around an assembled harness at any point along the run, which makes it the retrofit option where a closed expandable braid would force the loom to be unplugged. The flat braid curls shut around the bundle and holds by the spring of its own monofilament; pull the edges apart and it opens again for service. Catalogued range is -40 °C to +150 °C, confirmed against duty at order stage. Send the bundle OD and branch layout and we return the size and lap figure.
Specification
| Material | PET braid, split self-wrapping construction |
|---|---|
| Operating temperature | -40 °C to +150 °C catalogued; continuous rating confirmed at order stage |
| Shrink ratio | Non-shrink (self-wrapping elastic braid) |
| Wall type | Split (half-rolling) open mesh |
| Installation | Closes around the run at the point of work : no end feeding, no disassembly |
| Electrical function | None : not a dielectric, not EMI shielding |
How the half-rolling closure works
The braid is produced flat and biased to curl: release it and it rolls itself into a tube around the bundle, its two edges lapping over the top. The closure is the PET monofilament's own spring: no tape, clips or fasteners hold it shut. Coverage is the lap: the two edges must overlap far enough that the seam stays closed under vibration, which is why the size is chosen for the finished bundle diameter, not the flat width. The lap band per size is pending confirmation. The same spring works in reverse: pull the edges apart and the braid opens flat over the work area, so a wire change or repair needs no cutting and consumes no sleeve. Open mesh keeps the run ventilated while the monofilament wall takes the abrasion; like every plain PET braid it is not a dielectric and provides no EMI shielding unless a conductive construction is built in.
Where PET Braided Network Half-Rolling Sleeve is used
Primary applications: Retrofit wire-harness management. Equipment already wired and in service, harnesses that cannot be unplugged to feed a closed braid, and runs that will be opened repeatedly for service.
How to select the right size
The split construction adds one dimension to ordinary braid sizing: the lap:
- Bundle OD and lap. Size to the finished bundle so the edges overlap by the working quarter-turn figure; too little lap and the seam gapes, too much and the sleeve bulges. Per-size lap bands are in the pending data pack.
- Branches and breakouts. Note where branches exit the run. The lap opens at any point to serve a breakout and closes behind it, but the size must fit the largest branch junction it has to pass over.
- Service frequency. If the run will be opened often, say so : we confirm the construction's re-opening durability rather than assuming it.
- Abrasion zones. State the rub points; the same mesh carries less abrasion at the seam line than across the closed lap, so known sharp edges may call for a denser grade.
Common Failure Modes & How to Prevent Them
These are the issues most often seen when installing or specifying PET Braided Network Half-Rolling Sleeve, with the root cause and the prevention or fix for each.
The seam gaped open along the run
Root cause: The size was chosen too large for the bundle, so the two edges barely overlap and the monofilament spring has no lap to hold.
Fix: Size down so the edges overlap by the working quarter-turn figure. Where the run passes a tight bend that fights the curl, close the lap with a wrap of tape at that point.
The lap sat on a clamp and worked loose
Root cause: The seam was positioned directly over a clamp, tie point or sharp bracket edge, so vibration loaded the lap line instead of the closed mesh.
Fix: Rotate the seam away from clamps and edges during installation. The lap can sit anywhere on the circumference, so place it on the sheltered side.
It was treated as disposable like a closed braid
Root cause: Crews cut the sleeve off to reach a wire, then replaced the whole length: throwing away the one property this construction exists for.
Fix: Open the lap instead of cutting. Pull the edges apart at the work area, do the repair, press the lap shut. Train crews to the re-entry behavior once and the retrofit value holds.
A branch tore the mesh at the breakout
Root cause: The breakout was forced through the braid from outside instead of opening the lap at that point, distorting the mesh into a permanent split.
Fix: Serve breakouts through the opened lap, not through the mesh wall. Size for the largest branch junction so nothing has to be forced.
It was counted on as insulation or a shield
Root cause: The wrapped bundle looked finished and was read as a dielectric or an EMI shield. The wall is an open PET mesh with neither function.
Fix: Keep wire insulation as the dielectric; treat the sleeve as mechanical bundling only. For shielding duty, use a construction with a built-in conductive layer, bonded to ground.
Frequently asked questions
When should a split self-wrapping PET sleeve be chosen instead of expandable braid?
Choose the split wrap when the harness already exists and cannot be fed from an end. Equipment wired in place, long fixed looms, or bundles that would have to be unplugged to slide a closed braid on. The split wall opens along its length and closes around the run at the point of work. Expandable braid remains the faster choice for new builds fed from one end.
How much overlap is needed to keep the harness covered?
The two edges must overlap enough that the monofilament spring holds the lap closed through vibration. A quarter turn of the finished bundle is the working figure we size to, and the exact lap band per size is part of the pending data pack. Too little overlap and the seam gapes open; too much and the sleeve bulges and fights its own curl.
Can it be opened again for service?
Yes, that is the point of the construction. Pull the two edges apart at the seam and the braid opens flat over the work area; re-close by pressing the lap back down and the spring takes over again. Nothing is cut and nothing is consumed, so the same sleeve survives repeated re-entry. Where the seam passes a clamp or tight bend, a wrap of tape keeps the lap shut under extra load.
How does the half-rolling closure actually hold?
The braid is produced flat and biased to curl: released, it rolls itself around the bundle and its two edges lap over. The closure is the PET monofilament's own spring. No tape, clips or fasteners are needed to keep it shut, and that same spring is what opens again when pulled apart for service.
How are branches and connectors handled along the run?
Because the wall opens along its whole length, a branch or connector breakout is served anywhere: open the lap at that point, seat the breakout through the mesh, and close the lap again behind it. There is no need to start over from an end the way a closed expandable braid forces.
Is this sleeve insulation, shielding, or neither?
Neither. It is an open PET mesh for mechanical bundling and abrasion on already-insulated wire; it has no dielectric value and no conductive path, so it provides no EMI shielding unless a conductive construction is built in. Its electrical role stops at keeping the loom intact.
Request a quote for PET Braided Network Half-Rolling Sleeve
Send the bundle OD, branch layout and how often the run will be opened. We return the size, the lap figure, the confirmed temperature rating and lead time.
Size range & specification notes
Per-size bundle OD band and edge overlap requirement will be published once confirmed. Split self-wrapping construction on this page; the closed expandable member of the same PET braid family is listed separately.