12S/4 High Tenacity Spun Polyester Bag Closing Thread on 8kg Cones

MH Sewing Thread Factory

• 150,000m²

  Plant Area

• 35,000 tons

  Year Production

• 1,000+

  Workers

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About Ningbo MH

MH specializes in garment accessories and fabrics, offering high-quality solutions for the textile and home décor industries. With advanced automated warehousing, MH ensures efficient supply chain management and provides comprehensive after-sales support, exclusively serving businesses, not individuals.

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• 1999

  Since

• $871Million

  Annual Sales (2025)

• 40+

  Branch Offices

• 600+

  Office Staffs

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

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.