Material
Cotton Yarn
Natural textile fiber
Choose Cotton Yarn based on its stiffness, recovery, wear, wet-service, chemical, and temperature behavior. Do not select stiffness from the material name alone. Specify filament diameter, free trim, density, grade, and service conditions as one set.
Datasheet values
- Fiber diameter
- 12–25 µm per fiber
- Yarn diameter
- 0.5–8 mm
- Moisture regain
- about 7–9%
- Use temperature
- up to 100°C
- Liquid carrying
- very high
Cotton is a cellulose natural fiber whose absorbency and wet strength make cotton yarn useful for wiping and carrying liquids or compounds.
What is Cotton Yarn, and where is it used?
Cotton Yarn is a natural textile fill supplied as twisted yarn, mop tufts, or thread wound around a wire core. It is used where the tool has to carry liquid or compound rather than scrub — polishing mops, applicators and wiping heads.
Cotton Yarn is used in custom cleaning brushes for oil application, residue pickup, compound delivery and gentle tube, bottle or surface wiping.
Where a project stalls on material choice, the comparison is normally against Microfiber, Wool and Felt, and it turns on moisture uptake and working temperature.
Compare Cotton Yarn with Microfiber, wool, felt, PVA sponge. Change material when wet stiffness, temperature, chemical resistance, conductivity, particle shedding, or surface marking becomes the limiting factor.
What stiffness and contact pressure can I expect from Cotton Yarn?
Cotton Yarn is soft; stiffness is created mainly by yarn construction, packing density, trim length and backing. Contact pressure here comes from yarn construction, packing density, strand length and the backing behind it. A long loose strand mops and carries liquid; a short densely packed one scrubs. Filament diameter is not a specification for yarn.
The published material figures, set against the grades it competes with. The finished brush is rated from the whole assembly: face, backing and adhesive each have their own limit.
| Property | Cotton Yarn | Microfiber | Wool | Felt |
|---|---|---|---|---|
| Shore hardness | Not applicable (Yarn Has No Uniform Shore/Rockwell Hardness; industry reference range) | Not applicable (Microfiber Is Characterized by Linear Density and Fabric Structure; industry reference range) | Soft and springy; compaction into felt or a dense wheel increases firmness and pressure transfer. | Broad range from soft conformable pad to dense firm polishing wheel; density and thickness stated. |
| Continuous temperature (°C) | 80–100 | 80–120 | 100 | 120 |
| Peak temperature (°C) | 130–150 | 140–170 | 130 | 150 |
| Water absorption, 24 h | 7–12% (Near the Standard Moisture Regain, industry reference range) | 0.2–1.0%Material Itself ; Structure Can Absorb 3–7 Times Its Own Weight(industry reference range) | 5–20% (Natural Fiber; industry reference range) | Not applicable (Closed-Cell / Sheet Structure; Grade Dependent) |
| Filament diameter (mm) | 0.50–5.00 | 0.005–0.050 | 0.05–2.00 | Not applicable (Sheet / Foam Structure) |
| Flexibility | High Flexibility | High Flexibility | Medium Flexibility(Natural Variation) | Low to High Flexibility(Structure Dependent) |
The part people get wrong: the number that decides scrubbing pressure is diameter over trim length, not the grade name. Two brushes in this material can behave nothing alike.
How does water affect Cotton Yarn performance?
Cotton sits near 7–12% moisture regain, which is why a cotton head carries liquid into the work rather than pushing it ahead of itself.
Absorbent fiber that carries liquid and softens slightly when wet.
What this means for your application: water changes the working diameter and the spring rate together, so wet performance has to be checked rather than assumed from a dry trial.
A practical check: soak a sample for an hour and re-measure the trim. If it has moved enough to change the contact band, the grade is wrong for the duty.
What temperature limits apply to Cotton Yarn?
Ambient to 80°C.
Where it stops working: If the pile stays flattened after the load comes off, step up to Microfiber or Felt, which hold a higher continuous temperature.
The usable limit also moves with fibre size, pile height and contact pressure. A long light pile under light load tolerates more than a short dense one under heavy pressure.
What chemicals attack Cotton Yarn?
Compatible with water and mild detergent; strong alkali, bleach and prolonged soaking shorten fiber life.
The same cleaner can be harmless or destructive depending on how strong it is, how hot it runs and how long it sits. Quote the concentration and the dwell time, not just the product name.
Before you commit to a quantity: Give the yarn grade, the strand size and how it is constructed, and the strand length. Then say what it is backed with, whether it runs wet, at what temperature, and what it is exposed to.
What is the practical lower limit for filament diameter?
About 0.50 mm. Below that the filament turns fragile and breaks under ordinary contact pressure, so 0.50–5.00 mm is the working range.
Free trim runs 10–300 mm, and the two interact: a finer filament needs a shorter trim to keep useful stiffness, while a thicker one carries a longer trim and still lands pressure on the tip.
Split the range by duty: roughly 0.50–1.62 mm for light wiping, dusting and surfaces that mark easily, and 1.62–5.00 mm where residue is packed on and point pressure matters more than surface risk.
Tip treatments available on this filament: degreasing, bleaching, dyeing, waxing, oiling, anti-static and anti-mildew treatment.
In practical brush terms: reaching deep into a bore or crevice is a diameter problem before it is a length problem. A coarser strand on a moderate pile pushes further in before the tips fold over.
What applications typically use Cotton Yarn?
Oil application, residue pickup, compound delivery and gentle tube, bottle or surface wiping.
The cleaning work it is specified for most often:
- Tire Cleaning
- Automotive Detail Cleaning
- Tube & Pipe Cleaning
- Pipe Robot Brush Attachment Use
- Laboratory Tube Cleaning
- Wheel & Rim Cleaning
Brush types built with this fill:
- Custom Tube & Pipe Bore Brushes
- Custom Handheld Detail Brushes
If the sample comes back rejected: Lint, moisture retention, slow drying, fiber contamination and exposed wire make cotton unsuitable for some cleanroom, food or precision uses without validation.
How do I specify Cotton Yarn for a custom brush?
A usable specification carries the construction, the fibre or strand size, the pile height and packing density, the backing, and the service conditions: wet or dry, temperature, and what the cleaner actually is.
The mistakes that most often send a sample back:
- Selecting Cotton Yarn from the material name alone without setting the fibre or strand size, the pile or strand length and the backing
- Using dry stiffness to predict wet behavior without checking moisture absorption or liquid exposure
- Ignoring trapped abrasive particles, chemical concentration, temperature, or contact motion when assessing surface risk
Reference standards behind the figures on this page: ISO 527-1:2019; ASTM D638; ISO 62:2008; ASTM D570-22; ISO 868:2003; ASTM D2240-15(2021); ISO 4892-3:2024; ASTM G154-23; UL 94; ISO 139; ISO 5079; ISO 20743.
Source: Cotton Incorporated — Cotton fibre properties. Cotton absorbs into the fibre rather than holding fluid on its surface, which is what makes a cotton head useful for applying oil, lubricant or compound. It is low-lint rather than lint-free, and it mats and sheds as it saturates.
What else does the datasheet specify for Cotton Yarn?
| Filament cross-section | Multi-Strand Round Cord / Flat Tape |
|---|---|
| Electrical behaviour | Anti-Static When Wet; Insulating When Dry |
Questions this page is asked
How should cotton-yarn pickup and liquid delivery be qualified?
Using the actual fluid or compound, control temperature, viscosity, loading or immersion time, squeeze or drain step, contact pressure, speed and coverage interval. Measure absorbed and released mass, residual film, streaks, pickup efficiency, saturation point and lint on representative parts, then set reloading or change limits before the yarn redistributes contaminated liquid.
What should a cotton-yarn brush reuse procedure control?
Segregate it by soil and process area, define detergent, temperature, rinse, mechanical action and complete drying, and inspect retained residue, odor, discoloration, lint, yarn breakage, exposed wire and attachment security after each validated cycle. Retire the media when cleanliness, pickup or surface limits fail, and do not claim cleanroom, food or sterile suitability without separate evidence for the complete construction and reprocessing method.
Where these figures come from
| Property | Published value | Source |
|---|---|---|
| Chemical resistance | Compatible with water and mild detergent; strong alkali, bleach and prolonged soaking shorten fiber life. | Cotton Incorporated Retrieved 2026-07-20 |
| Published datasheet figures |
|
Cotton Incorporated Retrieved 2026-07-20 |
| Hardness and stiffness | Soft; stiffness is created mainly by yarn construction, packing density, trim length and backing. | Cotton Incorporated Retrieved 2026-07-20 |
| Limitations | Lint, moisture retention, slow drying, fiber contamination and exposed wire make cotton unsuitable for some cleanroom, food or precision uses without validation. | Cotton Incorporated Retrieved 2026-07-20 |
| Temperature resistance | Ambient to 80°C. | Cotton Incorporated Retrieved 2026-07-20 |
| Water resistance | Absorbent fiber that carries liquid and softens slightly when wet. | Cotton Incorporated Retrieved 2026-07-20 |
Guides that go deeper on this
No catalogue item for this yet
Every brush here is made to order, and this one has no catalogue entry so far. Send the working surface, the residue, the access opening and the quantity, and it is quoted through the same specification route as the rest of the range.
Custom Manufacturing RFQ
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Upload a drawing, product photo, or sample photo and provide the core dimensions and cleaning conditions.
“We need a brush to remove wet residue from a stainless steel conveyor, about 800mm wide. The current brush wears quickly. We can send photos.”
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