12S/4 1KG Spun Polyester Bag Closing Thread with 4-Ply Twisted Construction
100% Polyester Bag Closing Sewing Thread 12S/4 1KG
| Material: | 100% Spun polyester |
| Yarn Count: | 12S/4, 4-ply twisted construction |
| Net Weight: | 1kg per cone |
| Color: | Raw white (customized colors available) |
| Packaging: | 150g-10kg/cone |
| MOQ: |
|
◆ Lead Time: 25-35 days
◆ Shipping: Sea freight, Railway freight
◆ Payment: T/T, L/C ...
Product Details
The 12S/4 1kg polyester bag closing thread is a heavy-duty industrial sewing thread ideal for sealing thick and heavy packaging bags. Made from high-tenacity 100% spun polyester, it offers strong knot strength and consistent stitch quality. The 4-ply construction ensures higher durability and performance under high-speed sewing, making it suitable for heavy-duty automatic and industrial bag closing machines.
MH 12s/4 spun polyester bag closing sewing thread is a 100% spun polyester industrial thread built on a 12s/4 yarn count, meaning four plies of 12s spun singles twisted into one balanced cord for seam closing on filled sacks.
MH supplies this 12s/4 thread for closing woven polypropylene sacks, kraft paper sacks and multi-wall paper bags holding grain, feed, cement, fertiliser, sand and chemicals. The thread winds on cones for continuous feed, and MH produces it in raw white as standard or in customer-matched Pantone shades, with private-label cone and carton printing available on custom production runs.
Key Selling Points
- Four-ply spun construction: The 12s/4 build of this spun polyester bag closing thread balances four plies into one cord, so seam strength stays even across a full cone instead of drifting as the thread unwinds.
- Staple-fibre grip: MH spins the thread from staple polyester rather than filament yarn, giving the bag closing thread a matte, slightly fuzzy surface that locks the chain stitch into woven and paper sack fabric.
- Stable under machine heat: Low shrinkage and good colour fastness let this polyester bag closing thread run through heated, high-speed sewing heads without the stitch line puckering or the shade shifting.
- Clean high-speed running: Uniform winding and a low-lint finish keep the thread feeding smoothly on industrial bag closing lines, reducing thread breaks and needle-area build-up during continuous operation.
- Colour and label customisation: MH matches bag closing thread to customer Pantone references or physical samples and prints private-label cones and cartons for buyers running their own packaging brand.
- Manufacturer-direct supply: MH produces this spun polyester bag closing thread in its own mill, so wholesale buyers deal with the manufacturer on repeat bulk orders rather than through a trading layer.
Features
- High tensile strength for extra-strong seams
- Low shrinkage, oil-free, and low lint for clean machine operation
- Excellent abrasion and chemical resistance
- Uniform winding for smooth high-speed sewing
Thread Weight & Recommended Machine Models
| Thread Specification | Thread Weight | Machine Type | Recommended Models | Application |
|---|---|---|---|---|
| 20s/6, 20s/9 | 200g – 250g | Portable Bag Closer | GK9 Series, GK26-1A, NP-7A | On-site small-volume bag sealing, mobile use |
| 20s/6, 12s/4 | 500g – 1kg | Semi-industrial Stationary Machine | Fischbein F Series, Newlong NP-3X | Factory use, moderate sealing volume |
| 12s/4, 20s/6 | 1kg – 2kg | Industrial High-Speed Sewing Head | Fischbein Empress Series, Newlong DS-9C, Union Special 80800 | Continuous high-speed bag closing line |
| 20s/6, 20s/9 | 3kg – 4kg | Automatic Bag Closing System | Newlong DS-11, Fischbein PBC6000 Series | Fully automated packaging line |
Customization
- Thread color: Pantone-based or customer samples
- Private label & logo: Available on cone or outer box
- Cone type: Plastic or paper
- Packing: 1kg/cone, 10 cones/carton or as requested
- OEM & ODM: Welcome for bulk orders
Usage
This thread is specially developed for sealing large and heavy packaging bags used in agriculture, industry, and bulk transportation.
- Woven PP bags, kraft paper sacks, and multi-wall paper bags
- Used for packing: grain, cement, fertilizer, sand, feed, seed, charcoal, and chemicals
Suitable for use with heavy-duty industrial bag closing machines, including fixed-type and high-speed sewing heads.
Other Thread Products
We offer additional polyester thread options: corespun polyester sewing thread, high tenacity polyester sewing thread, cotton sewing thread, bag closing thread, recycled sewing thread, anti-UV sewing thread, waterproof sewing thread, fire-retardant sewing thread, High extension flex sewing thread, water soluble sewing thread, sewing thread sets.
