Machine Embroidery Thread Types: Polyester, Rayon and More
Machine embroidery thread types for apparel: polyester vs rayon vs cotton, metallic threads, thread weight and bobbin thread.
Production guide to machine embroidery thread: fibers, specialty threads, weight, bobbin thread and matching thread to use.
Among machine embroidery thread types, most production machine embroidery uses polyester or rayon thread in the standard 40 weight: polyester is chosen for wash and bleach durability, rayon for its soft sheen, and specialty threads such as metallic need setup changes.
Rule block: pick fiber by how the garment will be cleaned and worn, use the weight your designs were digitized for, and adjust needle, speed and tension for specialty threads.
Part of the embroidery guides in the DAX Learning Hub. New to embroidery? See Embroidery for Beginners.
Machine Embroidery Thread vs Hand Embroidery Floss
Machine thread is a single smooth, strong strand on a cone or spool, built to run at high stitch speeds. Hand embroidery floss is a loose multi strand product meant to be separated and stitched by hand. Floss is not a substitute on a commercial machine.
Machine Embroidery Thread Types: Polyester vs Rayon vs Cotton
| Fiber | Strengths | Watch outs | Typical use |
|---|---|---|---|
| Polyester | Strong, colorfast, resists chlorine bleach and harsh laundering | Sheen varies by product | Uniforms, workwear, kids wear, anything bleached or industrially washed |
| Rayon (viscose) | Soft, high sheen, smooth stitch appearance | Can fade or weaken with chlorine bleach and harsh laundering | Fashion and decorative work with gentle care |
| Cotton | Matte, natural look | Less common in production; check strength and colorfastness | Heritage or matte looks |
Metallic and Specialty Threads
Metallic threads add shine but are more sensitive to friction and heat. Shops commonly slow the machine, ease tension and use a larger or metallic eye needle per the thread maker's guidance. See Embroidery Needle Sizes. Other specialty threads, such as matte or glow effects, also need testing before an order.
Embroidery Thread Weight Explained
Thread weight is a numbering system where a higher number means a finer thread. 40 weight is the common standard for machine embroidery, and most stock designs are digitized for it. Finer weights such as 60 suit small lettering and fine detail, and usually need density changes in the design.
Bobbin Thread
Bobbin thread is a lighter thread, usually white or black, that stays on the back of the design. Use a bobbin thread or prewound bobbins made for embroidery, and keep bobbin tension consistent so top thread pulls to the back evenly.
Matching Thread to Garment and Use
Ask how the item will be cleaned. Bleached, industrially laundered or outdoor items point to polyester. Gentle care decorative items can use rayon. Corporate programs often standardize on one fiber for consistent reorders; see Corporate and Team Orders. If thread keeps snapping, work through Thread Breaks and Birdnesting, and when sizing up equipment see What to Know Before Buying an Embroidery Machine.
Frequently Asked Questions About Embroidery Thread Types (FAQ)
Polyester or rayon embroidery thread for workwear?
For workwear, polyester is usually the safer fit because it resists chlorine bleach and harsh laundering. Rayon suits gentle care decorative pieces.
What thread weight is standard for machine embroidery?
40 weight is the common standard, and most designs are digitized for it. Finer 60 weight is used for small text and fine detail.
Does metallic thread need a special needle?
It usually runs more smoothly with a larger or metallic eye needle, slower speed and eased tension. Follow the thread maker's guidance and test first.
What bobbin thread should I use?
A lightweight bobbin thread made for embroidery, usually white or black, or prewound bobbins, with consistent bobbin tension.
Does embroidery thread fade in the wash?
Quality polyester thread is generally colorfast through normal and bleach washing. Rayon can fade with chlorine bleach or harsh laundering, so match fiber to care.
Figures vary by garment, machine and product. Treat every range here as a starting point and check your supplier's or manufacturer's spec before production.
The right thread starts with how the garment lives. Browse more guides in the DAX Learning Hub, and check cities and dates on the DAX show schedule to compare thread lines with suppliers in person.