Nantong Rongdu Thread Co., Ltd.
Nantong Rongdu Thread Co., Ltd.
Focus On Heavy Duty Thread For 20 Years
Heavy Duty Filament Sewing Thread
Heavy duty filament sewing thread will not fray, unravel or break when sewing at high speeds that results in stitching evenly and smoothly, even while quilting several thick layers of fabric together. Therefore, the thread manage to handle all hard tasks for tough fabric.
Heavy Duty Bonded Thread
Bonding refers to the process of coating a thread in a resin placed on the thread to add strength and heat tolerance to prevent knots, snapping, and tangles when densely sewing at high speeds. Therefore bonded thread is stronger than regular thread and the best option for tough material.
Heavy Duty Embroidery Thread
Our embroidery thread refers to machine embroidery thread made from polyester filament. As the most popular go-to thread choice for embroidery, the thread has outstanding strength and durability to perform densely at multi-direction or through multi-layers without any damage, plus color fastness and gorgeous luster.
Rongdu Heavy Duty Thread Color
The Many Strong Thread Applications We Offer

By virtue of unique advantage of the threads, our products work great for weaving, sewing and quilting at many fields including footwear, leather goods, luggage and bag, furniture upholstery, mattress, sports equipment, denim and jeans, automobile, canvas, tent, wire and cable applications, filtration and more.

Nantong Rongdu Thread Co., Ltd.
Your Trusted Partner In Strong Thread

Rongdu is a professional manufacturer of heavy duty filament thread including sewing thread, bonded thread and bulk embroidery thread. We’re specialized in spinning continuous filament into thread which then further been winded on large cone/tube/cylinder or processed into hank packaging. Those different wind methods and packaging must satisfy your need of rewinding thread to small spools. We persistently strive to deliver an excellent customer experience through ensuring high quality and efficiency.

Strict Quality Control

Quality is our top priority. To ensure the finest quality, we put into production high-end equipment, procure high-grade raw materials, apply advanced manufacturing technology, have three testers conducting quality testing for every batch products.

Sufficient Supply with Various Sizes

Tens of millions of inventory and vast selection of sizes guarantee timing delivery of the most suitable thread. Moreover, OEM and ODM are also accepted.  

Direct Manufacturer

For every product on this site, Rongdu has own equipments and plants to process filament to the threads, which cuts out the middle man and get your money's worth.    

Superior Customer Support

We emphasize the importance of after-sale assistance.  Our conscientious and knowledgeable staff are commited to provide effective solutions to any after-sale problem.   

Latest News And Blog
Nov, 28 2023
What Are the Differences Between Polyester Sewing Thread and Nylon Sewing Thread?
How to distinguish polyester sewing thread and nylon sewing thread?In fact, the difference between polyester sewing thread and nylon sewing thread is very obvious, as described below:Polyester sewing ...
Nov, 14 2023
What Principles Should Be Followed When Choosing High-Strength Sewing Thread?
High-strength sewing thread matches the characteristics of the fabricOnly when the sewing thread is the same or similar to the raw material of the fabric, can the consistency of its shrinkage, heat re...
Sep, 18 2023
Quality Requirements and Assessment Methods for Sewing Thread
High-quality sewing thread should have sufficient tensile strength, smooth and flawless surface, uniform thread dryness, good elasticity, small shrinkage, good color fastness, good chemical resistance...
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