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Strapping

Strapping, also known as banding or bundling strap, is a flexible, high-tensile flat band used to secure, unitize, palletize, and reinforce loads for storage and transit. It is manufactured from steel, polyester (PET), polypropylene (PP), or nylon, and applied with a tensioning tool, sealer, or friction-weld machine before being locked with metal seals, plastic buckles, or heat welds.

From steel coils and lumber bundles to palletized cartons and newspapers, strapping is the backbone of load containment across steel mills, logistics, paper, construction, agriculture, and recycling industries — offering predictable holding force at a fraction of the cost of boxes, crates, or stretch wrap.

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Detailed Introduction

Key Features

✓ High Tensile Strength: Rated tension from 120 kgf (PP) up to 1,200+ kgf (heavy-duty steel) — select the grade to match load weight and transit stress.
✓ Elongation Control: PET/steel have low creep (< 2%) for rigid loads; PP/nylon offer higher elasticity for settling or compressible goods.
✓ Secure Locking Systems: Metal seals, plastic buckles, friction welds, heat seals, or self-locking — no adhesive required.
✓ Weather & UV Resistance: PET and polyester composite straps resist moisture, UV, and temperature swings; galvanized steel prevents rust.
✓ Safe Application: Modern hand tools and battery-powered tensioners reduce operator strain and strap recoil risk.
✓ Cost-Effective: Lower material and labor cost per unit versus crating, boxes, or heavy-duty stretch wrap.
✓ Printable & Traceable: Surface accepts brand printing, lot numbers, or QR codes for traceability.

Material Comparison

Material	Tensile Strength	Elongation	Best For
Steel (regular duty)	400 – 1,000 kgf	< 1%	Steel coils, heavy pallets, export crates
Steel (high-tensile)	700 – 1,300 kgf	< 1%	Structural steel, wire rods, machinery
Polyester (PET)	200 – 700 kgf	1% – 3%	Rigid loads, brick/block, palletizing
Polypropylene (PP)	100 – 350 kgf	5% – 15%	Light cartons, newspapers, bundling
Nylon	200 – 500 kgf	15% – 25%	Elastic loads, frozen goods, textiles
Composite / Cordstrap	250 – 1,100 kgf	2% – 5%	Heavy-duty replacement for steel

Technical Specifications (Common Ranges)

Parameter	PP	PET (Polyester)	Steel
Width	5 – 19 mm	9 – 25 mm	12 – 32 mm
Thickness	0.35 – 1.10 mm	0.40 – 1.20 mm	0.30 – 1.30 mm
Tensile Strength	100 – 350 kgf	200 – 700 kgf	400 – 1,300 kgf
Elongation at Break	5% – 15%	1% – 3%	< 1%
Surface	Embossed / smooth	Smooth / embossed	Painted / waxed / galvanized
Core Size	200 / 230 / 406 mm	200 / 230 / 406 mm	200 / 230 / 300 mm
Length per Coil	500 – 4,000 m	300 – 1,600 m	30 – 200 m
Color	White, black, custom	Green, black, custom	Metallic (painted options)

Product Range

Type	Material	Tension	Best For
Light-Duty PP	Polypropylene	100 – 250 kgf	Carton bundling, newspaper, parcels
Heavy-Duty PP	Polypropylene (embossed)	250 – 350 kgf	Pallet stabilization, brick packs
Standard PET	Polyester	300 – 550 kgf	Beverage pallets, cans, rigid loads
High-Tensile PET	Polyester (cord-reinforced)	550 – 700 kgf	Steel, lumber, block/brick, export
Regular-Duty Steel	Steel (painted/waxed)	400 – 700 kgf	Coils, heavy pallets, machinery
High-Tensile Steel	Steel (heat-treated)	700 – 1,300 kgf	Structural steel, wire rods, rebar
Composite Strap	PET + polyester fibers	250 – 1,100 kgf	Safe steel replacement, heavy loads

Applications

Steel & Metals: Coils, sheets, bars, pipes, wire rods, rebar bundles.
Logistics & Palletizing: Unitizing cartons, cans, bottles, and bags on pallets.
Paper & Printing: Newspaper bundles, paper reels, cardboard bales.
Construction: Lumber, brick, block, roofing tile, insulation bundles.
Agriculture: Hay bales, cotton bales, produce crates, timber.
Recycling: Plastic, metal, and paper bales for compact transport.
Export & Shipping: Securing heavy crates, machinery, and containers for long-haul transit.

Sealing Methods

Method	Compatible Materials	Description
Metal Seals (seal & crimp)	Steel, PET	Metal seal crimped with a tool — strongest permanent lock
Plastic Buckles	PP, PET, composite	Reusable buckle — no tool welding required
Friction Weld	PP, PET	Tension + weld with a battery/pneumatic tool — fast, seal-less
Heat Seal	PP, PET	Melted overlap seal — common in automatic machines
Self-Locking	PP, PET	Pre-molded teeth — hand-tighten, no tool

Strapping Selection Guide

Load Characteristic	Recommended Strap
Heavy, rigid (steel/stone)	Steel or high-tensile PET
Medium, rigid (pallets, brick)	Standard PET
Light, compressible (cartons)	PP
Elastic / settling load	Nylon or PP
Outdoor / long transit	PET or galvanized steel
Operator safety priority	Composite / cordstrap (low recoil)

Customization

Width & Thickness: Custom cross-section to meet tension and tool specs.
Color: Standard colors or brand-matched Pantone colors (PP/PET).
Surface: Smooth, embossed (anti-slip), painted, waxed, or galvanized.
Printing: Company logo, brand name, handling instructions, barcodes.
Core Size: 200 mm, 230 mm, 300 mm, or 406 mm (16") to fit dispensers and machines.
Packaging: Coils, spools, or oscillated wound reels; individual boxes or palletized.

Tools & Accessories

Manual Tensioners & Sealers: For low-volume PP/PET/steel strapping.
Battery-Powered Tools: One-handed tension + friction weld for mobile use.
Pneumatic / Electric Tools: High-volume production lines.
Automatic Strapping Machines: Fully automatic tension, weld, and cut for carton lines.
Dispensers & Carts: Mobile coil dispensers with brake control.
Seals & Buckles: Galvanized steel seals, aluminum buckles, plastic buckles.

Storage & Handling

Store coils upright in a dry, ventilated area (10°C – 30°C), away from direct sunlight and moisture.
Protect steel strap from corrosion; inspect painted/waxed coating.
Use within 24 months for optimal performance (PET/PP); steel has longer shelf life.
Handle coils carefully to avoid kinks, edge damage, or coil collapse.
Train operators on proper tensioning to avoid over-stretch and snap-back.

Safety Notes

Always wear safety glasses and gloves when tensioning and cutting strap.
Never stand in line with a tensioned strap under load (recoil hazard).
Use appropriate tools for the strap material and tension rating.
Inspect straps and seals before transit; re-tension if load has settled.