Material
Goat Hair
Natural animal hair filament
Choose Goat Hair based on its stiffness, recovery, wear, wet-service, chemical, and temperature behavior. Stiffness is set by the complete filament specification, including material, diameter, free trim, density, grade, and service conditions.
Datasheet values
- Fiber form
- Natural goat hair
- Brush stiffness
- Very soft, with behavior controlled by hair grade, bundle density and trim
- Liquid carrying
- Natural hair can carry liquid but also absorbs moisture
- Temperature use
- No universal continuous brush-service value; confirm the actual hair grade and process
Goat hair is a fine, soft natural animal hair with a natural kink, used in short soft brushes rather than abrasive cleaning tools.
What is Goat Hair, and what makes it different from other brush filaments?
In the natural animal hair filament family, Goat Hair is specified, supplied as natural bristle, drawn in natural near-round and oval sections and set in straight rows, staggered, zoned and random fill patterns.
Goat Hair is used in custom cleaning brushes for very soft dust removal, delicate surface finishing and optical or instrument cleaning with low contact pressure.
It is usually weighed against Boar Bristle and Microfiber, and the deciding difference is moisture uptake and working temperature rather than anything you can read off the name.
Compare Goat Hair with Boar bristle, goat hair, microfiber. 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 Goat Hair?
Goat Hair is soft to medium natural hair; gentler than boar bristle and much softer than wire. Use finer filament and longer trim for conformable contact; use coarser filament, shorter trim, or higher density for stronger displacement or cutting.
Filament-level figures for this grade and the ones it is usually compared to. The brush built from it is rated lower: the anchoring and the adhesive give out before the filament does.
| Property | Goat Hair | Boar Bristle | Microfiber |
|---|---|---|---|
| Shore hardness | Not applicable (Natural Fibers Have No Uniform Shore/Rockwell Hardness; industry reference range) | Not applicable (Natural Fibers Have No Uniform Shore/Rockwell Hardness; industry reference range) | Not applicable (Microfiber Is Characterized by Linear Density and Fabric Structure; industry reference range) |
| Continuous temperature (°C) | 50–70 | 60–80 | 80–120 |
| Peak temperature (°C) | 90–110 | 100–120 | 140–170 |
| Water absorption, 24 h | 12–20% (Equilibrium Moisture Uptake, industry reference range) | 10–18% (Equilibrium Moisture Uptake, industry reference range) | 0.2–1.0%Material Itself ; Structure Can Absorb 3–7 Times Its Own Weight(industry reference range) |
| Filament diameter (mm) | 0.02–0.10 | 0.10–0.35 | 0.005–0.050 |
| Flexibility | High Flexibility | Medium to High Flexibility | High Flexibility |
The part people get wrong: the same grade can feel soft or aggressive depending on diameter, trim and density. Specify that geometry before the material, or the sample will surprise you.
How does water affect Goat Hair performance?
Goat hair holds roughly 12–20% moisture at equilibrium, the highest of the animal hairs used in brushes, and softens noticeably as it does.
Absorbent fiber that carries liquid and softens slightly when wet.
What this means for your application: absorbed water swells the filament and drops contact pressure, so a brush that reached the far end of a bore when dry may stop short once it is wet.
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 Goat Hair?
Use animal-hair fills mainly at ambient to moderate process temperatures unless the supplier provides a validated higher-temperature rating for the exact brush. Do not treat a generic temperature number as a universal continuous limit.
Where it stops working: If the filament takes a permanent set under load, step up to Microfiber or Boar Bristle, which hold a higher continuous temperature.
The usable limit also moves with diameter, trim and contact pressure. A fine filament under light load tolerates more than a thick one under heavy scrubbing.
What chemicals attack Goat Hair?
Natural-hair response varies with detergent chemistry and exposure. Confirm the cleaner and avoid treating goat hair as a wet chemical-process fill without supplier or test data.
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: Specify the exact Goat Hair grade or alloy, filament or profile size, color, straight or crimped form, working temperature, wet or dry use, chemical exposure, surface finish, and any required material documentation.
What is the practical lower limit for filament diameter?
About 0.02 mm. Below that the filament turns fragile and breaks under ordinary contact pressure, so 0.02–0.10 mm is the working range.
Free trim runs 8–100 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 0.02–0.04 mm for light wiping, dusting and surfaces that mark easily, and 0.04–0.10 mm where residue is packed on and point pressure matters more than surface risk.
Tip treatments available on this filament: cleaning and degreasing, bleaching, dyeing, carding and sanitizing treatment.
In practical brush terms: reaching deep into a bore or crevice is a diameter problem before it is a length problem. A thicker filament on a moderate trim pushes further in before the tips fold over.
What applications typically use Goat Hair?
Very soft dust removal, delicate surface finishing and optical or instrument cleaning with low contact pressure.
Where it turns up in practice:
- Brick, Tile & Building Material Machine Brush Use
- Dust Removal
- Industrial Machine Cleaning
- Carpet Machine Cleaning
- Mold Cavity Cleaning
- Connector & Slot Cleaning
It is normally set into these constructions:
- Custom Handheld Detail Brushes
- Custom Roller and Conveyor Brushes
- Custom Strip Seal Brushes
If the sample comes back rejected: Best suited to soft dusting, polishing, and sensitive-surface contact; not a substitute for aggressive scrubbing or a validated wet chemical-process fill.
How do I specify Goat Hair for a custom brush?
A usable specification carries the construction, the filament diameter and free trim, the density and contact setting, and the service conditions: wet or dry, temperature, and what the cleaner actually is.
The mistakes that most often send a sample back:
- Selecting Goat Hair from the material name alone without setting filament diameter, trim length, and density
- 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 139; ISO 5079; ISO 20743.
Source: International Wool Textile Organisation — Wool Notes — natural animal fibre properties. Goat hair is the soft end of the animal-fibre range and is chosen where the surface must not be marked. It holds fluid readily, which is an advantage in application work and a problem where the brush must dry between uses.
What else does the datasheet specify for Goat Hair?
| Filament cross-section | Natural Near-Round / Oval |
|---|---|
| Electrical behaviour | Anti-Static When Wet; Dry Surface Resistance Approximately 10^8–10^12 Ω(industry reference range) |
Questions this page is asked
What qualifies goat hair for optical or instrument-surface dusting?
Test representative coatings and surface finishes with the expected particle load, brush angle, force and stroke and inspect for residual particles, streaks, scratches, fibre transfer and exposed-holder contact. Define a pre-use cleaning, protected storage and retirement method so trapped grit or broken tufts cannot turn a very soft fill into a scratching source.
What extra evidence is required if a goat-hair brush is described as anti-static?
Define whether the requirement is low charging, dissipative behavior or a conductive path and measure the finished brush under stated humidity, voltage, electrode and use conditions. If grounding is required, verify continuity through the ferrule, handle and installation to the designated ground; goat hair or an anti-static product label alone does not qualify an ESD-control process.
Guides that go deeper on this
We have not written a guide specific to this one yet. The material that covers selection, filament, dimensions, maintenance and sourcing is collected in the technical resources library.
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.”
“We sell drinkware and need a cleaning brush to include with the product. Quantity around 5,000 pieces.”