12S/4 High Tenacity Spun Polyester Bag Closing Thread on 8kg Cones
12S/4 8kg Polyester Bag Closing Thread
| Material: | 100% Spun polyester |
| Yarn Count: | 12S/4, 4-ply twisted construction |
| Net Weight: | 8kg per cone |
| Color: | Raw white (customized colors available) |
| Packaging: | 150g-10kg/cone |
| MOQ: |
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◆ Lead Time: 25-35 days
◆ Shipping: Sea freight, Railway freight
◆ Payment: T/T, L/C ...
Product Details
The 12S/4 8kg 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 Polyester Bag Closing Thread is a high-tenacity spun polyester closing thread wound on large-format cones, built for sack sewing lines that run without frequent thread changes.
MH supplies the thread in raw white as standard and dyes to customer color references when a mill needs color-coded threads to tell grades, shifts or product lines apart on the packing floor. Typical use is closing woven polypropylene sacks, kraft paper sacks and multi-wall paper bags holding grain, feed, seed, fertiliser, cement, sand and dry chemicals. Cone type, wind format and private-label marking are all adjustable for OEM programmes.
Key Selling Points
- Run continuity: MH large-format cones of 12S/4 bag closing thread carry enough thread for extended closing runs, cutting the changeover stops that interrupt an automated sack line.
- Stable unwind tension: Precision cross-winding on MH bag closing thread keeps delivery tension consistent as the package depletes, so stitch tension does not drift over a long run.
- Seam durability: High-tenacity spun polyester gives MH bag closing thread the knot and loop strength needed to keep a closed sack intact through stacking, handling and long-distance transport.
- Clean machine running: A low-lint, low-shrinkage finish keeps MH bag closing thread from loading up needle plates and loopers, which supports uninterrupted operation on high-throughput closing equipment.
- Color-coded supply: MH dyes bag closing thread to customer color references so packers can distinguish grades, shifts or product lines by seam color on the floor.
- Certified production: MH bag closing thread is produced under OEKO-TEX Standard 100 certification, supporting buyers who need documented textile compliance for export packaging.
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: 8kg/cone, 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.
