Polyester Strip Brushes
Polyester filament is suitable for use in strip brushes in some environments and applications where neither polypropylene nor nylon make a good fit. Polyester is less stiff than polypropylene and comparable to nylon in dry stiffness modulus, but superior to nylon in wet stiffness due to its lower water absorption rate. Like nylon, polyester offers a higher softening and melting point than polypropylene, and superior memory or bend-recovery. Polyester excels over nylons and polypropylene in high-temperature oxidation resistance, or the tendency to lose physical properties over time at elevated temperatures. Polyester is less expensive than nylons, but slightly more expensive than polypropylene filaments. Polyester is available by special order in FDA-approved for food contact versions.
For a custom quote on polyester strip brushes, start by selecting a channel size from the chart below:
| Strip Brush Diagram | Channel Size |
(A) Base Width ± .010″ |
(B) Leg Height ± .010″ |
Minimum Visible Trim |
Synthetic Fill Size Range |
Send RFQ |
|---|---|---|---|---|---|---|
 |
4 | .190″ | .195″ | 0.5″ | .003″-.014″ |  |
| 5 | .210” | .250” | 0.625” | .003”-.020” | |
|
| 7 | .300” | .315” | 0.75” | .003”-.060” | |
|
| 8 | .335” | .375” | 0.75” | .003”-.120” | |
|
| 10 | .385” | .480” | 1.0” | .003”-.120” | |
|
| 12 | .430” | .565” | 1.0″ | .003”-.120” | |
Channel base material options for polyester strip brushes include:
- Galvanized Steel – most economical
- Stainless Steel – resists corrosion
- Brass – low electrical resistance
- Aluminum – resists corrosion, lightweight
Polyester strip brushes are superior to nylons in resistance to moderate strengths of acids. In contact with certain chemicals, nylon 6.12 offers superior resistance, including: acetone, benzene, ethyl acetate, hydrocarbons, methyl ketones, potassium hydroxide, sodium hydroxide, and toluene. Application testing may be recommended, and a detailed chemical compatibility analysis can be performed upon request.
| Material Properties | Polyester | Polypropylene | 6-6 Nylon | 6-12 Nylon |
|---|---|---|---|---|
| Stiffness Modulus Dry |
450
|
745
|
512
|
450
|
| Stiffness Modulus Wet |
447
|
700
|
160
|
400
|
| Water Absorption % |
0.33%
|
0.03%
|
9%
|
3%
|
| Bend Recovery % |
90%
|
75%
|
90%
|
90%
|
| Softening Point (°F) |
250°
|
240°
|
250°
|
250°
|
| Melting Point (°F) |
482°
|
330°
|
495°
|
410°
|
The following sizes and formats of polyester filament are normally available in stock, but other sizes in a range from .006″ to .075″ filament diameter can be ordered to suit the application:
| Format | Color | Medium | Medium-Stiff |
|---|---|---|---|
|
Crimped
|
Black and Natural
|
0.014″
|
0.022″ -0.024″
|
Spiral Brush also offers a variety of strip brush holders in sizes to fit whatever size strip you select.
Polyester Strip Brush Holders:
 Strip Brush Holder Vertical |
 Strip Brush Holder Horizontal |
 Double Channel Strip Brush Holder |
 Stainless Steel Strip Brush Holder |
 Stainless Steel Channel Clip and Steel Channel Clip |
Learn More About Polyester Strip Brushes
Have questions about replacing worn polyester strip brushes or have a new need? Interested in receiving a quote, or need help specifying a polyester strip brush? Contact Spiral Brushes to learn which options are best suited for your specific application.