heavy duty thread
high strength sewing thread

Features of Heavy Duty Sewing Thread

Heavy Duty Sewing Thread has a certain tensile force, strong tensile force, luster, high temperature resistance, high speed, and is mainly suitable for leather sewing, such as: shoe industry, bag industry, sofa industry, etc. High-strength thread is the most common leather sewing thread.

Different from ordinary filament sewing thread, the raw material of high-strength sewing thread has special requirements. Generally, the required breaking strength of the raw material is greater than 7.0GD (such as polyester). Hongfeng Doyte series high strength poyester sewing thread uses the best raw materials to break Strength is greater than 8.0GD.

Heavy Duty Polyester Sewing Thread

Heavy Duty Polyester Sewing Thread made of CF polyester, has high strength, good elasticity, wear resistance, low shrinkage and good chemical stability. However, the melting point is low, and it is easy to melt at high speed, so attention should be paid to the selection of needles. Mainly used for denim, sportswear, leather products, wool and military uniforms, etc. It is the most used and popular high-strength sewing thread.

Heavy Duty Nylon Sewing Thread

Heavy Duty Nylon Sewing Thread made of pure CF nylon, divided into filament thread and elastic deformation thread. Commonly used is filament high-strength sewing thread, which has large elongation and good elasticity, and its tensile length at the moment of breaking is three times greater than that of cotton thread of the same specification. For the sewing of chemical fiber, woolen, leather and elastic garments.

How to Choose the Right Heavy Duty Sewing Thread

Under the specified conditions, the ability of high-strength sewing threads to form good stitches while maintaining certain mechanical properties, called sewability, is a comprehensive indicator for evaluating the quality of sewing threads. According to the material, thickness, structure, color, sewing style, sewing equipment or means of the sewing material, select sutures and needles with matching types and specifications. Generally, the following principles can be followed:

1. The speed of your industrial sewing process
2. Whether your sewing is unidirectional or multidirectional
3. The importance of a perfect, flat seam
4. How thick and tough the stitch needs to be
5. How heavy the material is
6. The amount of friction and abrasion the material causes
7. We recommend that you learn as much as possible about the specs involved and how they relate to your application. Look at critical parameters such as denier (thread size), strength, and elongation at break.

Coordinate with fabric properties

It can ensure the uniformity of shrinkage rate, heat resistance, abrasion resistance, durability, etc., and avoid shrinkage caused by excessive differences between threads and fabrics. Generally, soft and thin materials use thin threads with small needles, and hard and thick materials use thick threads and large needles.

Coordinate with sewing equipment

The lockstitch machine uses left-handed stitches, which can be twisted during sewing to maintain the strength of the stitches.

Coordinate with stitch form

The bag (stretch) sewing machine uses fine cotton thread, the sewing material is not easy to deform and wrinkle, and the chain stitch is beautiful and comfortable. Double stitches should use sutures with good extensibility. The crotch seam and shoulder seam should use firm stitching. Buttonhole stitches should be durable stitches.

Coordinate with the type of clothing

Special-purpose clothing, such as elastic clothing, needs to use elastic nylon thread, and fire-fighting clothing should use high-strength threads with heat-resistant, flame-retardant and waterproof treatment.

Heavy Duty Sewing Thread: Bonded Thread VS Non-bonded

Non-bonded CF Thread

Non-bonded high strength sewing threads and yarns are minimally processed. These products are often labeled as soft threads due to their appearance. Although these soft threads don’t go through a coating process, they’re usually conditioned and heat-set before final winding to prevent the individual ends from opening up when cut.

Soft, non-bonded high strength sewing thread and yarn are most suited for slower processing speeds where multi-directional sewing is not required. When your manufacturing involves long unidirectional sewing patterns, adequately lubricated non-bonded filament thread and yarn may be processed at high speeds. In many instances, soft filament sewing thread can also be used as a bottom thread.

A non-bonded high strength sewing thread has the advantage of being widely available at a lower cost than bonded filament thread and may work well in sewing processes where you need a large quantity of reasonably-priced thread without the demands of high tension, high speed, or abrasive/thick materials.

CF Bonded Thread

If high-speed multi-directional sewing is part of your process, use bonded high strength sewing thread to prevent snags and cuts. Bonded filament thread has a resin coating that prevents the plies of the thread from opening up in the reverse direction and becoming clumped together.

The bonded coating of this type of high strength sewing thread creates a smooth, even finish that keeps the ends together with more cohesion and resists friction and abrasion. This means your industrial sewing process can take place at very high speeds, even with multi-directional sewing. An additional benefit of bonded sewing thread is fray resistance for cut ends and slightly stiffer yarn that is much easier to handle for threading and needle applications.

Application

Bonded heavy duty sewing thread and industrial yarns are a great fit for heavy industrial applications like the manufacture of geotextiles, synthetic web slings, heavy tarps, canvas, and automotive upholstery.

Increasingly, bonded filament threads are used to replace soft yarns in the critical industrial manufacturing of fiber optic cables and wires as ripcords, binders, or strength members. Other uses include heavy stitching applications that require light product weight overall, like automotive airbags, lifting slings, tie-downs, rock climbing gear, sporting equipment, and parachutes.

Heavy Duty Sewing Thread Size Descriptions

Size 15

Size 15 (Tex 16) high strength sewing thread is an ultra lightweight thread used on home and commercial machines with a size 70/10 to 80/12 needle. Its stitch appearance is inconspicuous.

Size 33

Size 33 (Tex 30) high strength sewing thread is a lightweight thread used on home and commercial machines with a size 80/12 to 90/14 needle. Its stitch appearance is inconspicuous.

Size 46

Size 46 (Tex 45) high strength sewing thread is a lightweight thread used on home and commercial machines with a size 90/14 to 100/16 needle. Its stitch appearance is inconspicuous.

Size 69

Size 69 (Tex 70) filament thread is a middleweight thread used on home and commercial machines with a size 100/16 to 110 /18 needle. Its stitch appearance is inconspicuous, becoming more noticeable.

Size 92

Size 92 (Tex 90) filament sewing thread is a middleweight thread used on commercial machines with a size 110/18 to 125/20 needle. Its stitch appearance is noticeable.

Size 138

Size 138 (Tex 135) is a middle to heavyweight thread used on commercial and heavy duty machines with a size 125/20 to 140/22 needle. Its stitch appearance is noticeable, beginning to stand out.

Size 207

Size 207 (Tex 210) filament thread is a heavyweight thread used on commercial and heavy duty machines with a size 140/22 to 180/24 needle. Its stitch appearance stands out.

Size 277

Size 277 (Tex 270) high strength sewing thread is a heavyweight thread used on commercial and heavy duty machines with a size 180/24 to 220/26 needle. Its stitch appearance stands out, becoming more of a focal point.

Size 346

Size 346 (Tex 350) filament sewing thread is a heavyweight thread used on heavy duty machines with a size 220/26 to 260/28 needle. Its stitch appearance is a focal point.

Size 415

Size 415 (Tex 410) fliament thread is a heavyweight thread used on heavy duty machines with a size 260/28 to 330/30 needle. Its stitch appearance is a focal point. It is available in black and white.

Size 554

Size 554 (Tex 600) filament sewing thread is an ultra heavyweight thread used on heavy duty machines with a size 330/30 to 360/32 needle. Its stitch appearance is a focal point. It is about 1 mm thick.