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A buyer calls and asks for “your strongest filament tape.” We can ship it. But roughly half the time it is the wrong answer, because the highest tensile grade in our range also has one of the lowest peel values. Tensile is what people ask for. Peel and holding power are what decide whether the bundle survives. This is the selection logic we use internally. 1. What filament tape is actually for (and what it is not) First, clear up a common mistake. Filament tape is not a stronger version of carton sealing tape. Carton sealing tape holds a closure together; filament tape carries a load. Different job, different spec. Where it earns its place: Bundling and unitising. Holding pipe, bar stock, extrusions, timber or cable into a shippable unit. Component securing in transit. Shelves, trays and panels inside a refrigerator or washing machine that must not shift between factory and installation. Reinforcement. Bridging a weak point — a seam, a corner, a splice — rather than carrying the whole load. Heavy structural bundling. Steel cable, wire rope and bridge strand, where the tape is a permanent part of the assembly. Why buyers move to it from strapping: no tools, no tensioner, no PPE, no cut ends, no damage to coated or painted surfaces, and it conforms to irregular shapes that strapping cannot. It also takes print, which matters when the bundle carries a part number. 2. The first fork: mono-directional, bi-directional or double-sided This is the decision that matters most, and it has nothing to do with strength numbers. Type Prefix Structure Behaviour Use it when Mono-directional JLT Fiberglass or chemical fibre yarn running lengthwise, on PET or BOPP film Very strong along the roll, deliberately weak across it You wrap around something. All the load runs in one direction, and the cross-direction weakness lets you tear it cleanly by hand. Bi-directional JLW Yarn in a cross-hatch grid, on PET or BOPP film Strong in both directions, resists tear propagation The load is multi-directional or the tape will be punctured. Pallet securing, box reinforcement, sealing and transport reinforcement. Double-sided JLW-3xx / JLS Adhesive on both faces, fibre-reinforced (JLW) or cotton tissue (JLS) Bonds two surfaces rather than wrapping Sports flooring installation, decorative trim, nameplates, membrane switches, electronic labels. The one-line rule: if it goes around the load, mono-directional. If it sits on a surface and resists stress from more than one direction, bi-directional. If it joins two faces, double-sided. 3. Never spec on tensile alone — read three numbers together Every TDS gives tensile, peel adhesion and holding power. They pull against each other, and picking on tensile alone is the most expensive mistake in this category. Tensile strength — resistance to being pulled apart along the roll. This is the headline number. Peel adhesion (90°) — how hard it grips the surface. High tensile with low peel means th...
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