I. Overview of Common Industrial Brush Filament Materials
The performance of industrial brushes largely depends on the choice of filament material. Different filament materials vary significantly in abrasion resistance, temperature resistance, chemical resistance, flexibility, and cost. Below is a quick classification of common filament materials:
| Material Category | Typical Materials | Application Scenarios |
|---|---|---|
| Polyamide (Nylon) | PA6, PA66, PA610, PA612 | General dust removal, polishing, deburring |
| Polyester | PBT, PET | Acid-resistant environments, food-grade scenarios |
| Polyolefin | PP, PE | Acid/alkali resistance, wet cleaning |
| High-Performance Engineering Plastics | PEEK, PPS, PVDF | High temperature ≥200°C, strong corrosive media |
| Metal Wire | Steel wire, copper wire, stainless steel wire | Heavy-duty rust removal, high-temperature furnace cleaning |
| Natural Materials | Bristle, horsehair, sisal | Precision polishing, artifact cleaning |
II. Key Performance Indicator Comparison
When selecting materials, focus on the following four dimensions:
| Material | Continuous Service Temp | Bending Recovery | Water Absorption | Relative Cost |
|---|---|---|---|---|
| PA612 | -40~100°C | ≥95% | ≤3% | ★★ |
| PBT | -40~140°C | ≥90% | ≤0.4% | ★★ |
| PP | -20~90°C | ≥88% | ≤0.1% | ★ |
| PEEK | -60~260°C | ≥95% | ≤0.5% | ★★★★★ |
| Steel Wire (304) | -100~500°C | — | 0% | ★★★ |
III. Working Condition Selection Decision Tree
Step 1 — Determine Temperature Range: Operating temperature ≤100°C choose PA series or PBT; 100~200°C choose PPS or aramid; >200°C choose PEEK or metal wire.
Step 2 — Evaluate Chemical Environment: When acid/alkali media are present, prefer PP (acid/alkali resistant), PBT (acid resistant), or PVDF (strong acid/alkali resistant); for organic solvent environments, choose PEEK or metal wire.
Step 3 — Clarify Abrasion Requirements: Continuous high-speed operation scenarios choose PA612 or wear-resistant additive-modified nylon; general intermittent conditions choose PBT.
Step 4 — Consider Cleanliness Level: Cleanrooms/dust-free workshops require low-particle-generation materials (PVA sponge, PBT) along with particle release testing.
IV. Common Selection Pitfalls and Avoidance Guide
Pitfall 1: Focusing on a single indicator while ignoring comprehensive working conditions. For example, PA66 has better mechanical strength than PA610, but PA66 has up to 8% water absorption — dimensional stability in humid environments is far inferior to PA610.
Pitfall 2: Over-pursuing high-performance materials. Although PEEK has excellent performance, its cost is 10~15 times that of PA612. Most industrial scenarios can be satisfied with PA612 or PBT without over-engineering.
Pitfall 3: Ignoring the match between filament diameter and fill density. Even with the correct material, if filament diameter is mismatched (too thick damages workpiece, too thin insufficient dust removal), actual performance will be greatly compromised.
Summary: Filament material selection is a systematic engineering task requiring balanced consideration of temperature, chemical media, abrasion requirements, cost budget, and cleanliness level across five dimensions. We recommend using the platform's AI Smart Selection tool to quickly obtain recommended material solutions.
I. Definition and Engineering Significance of Fill Density
Fill Density refers to the number of filament holes per unit area on a brush roller, typically measured in holes/cm² or holes/inch². It is a core design parameter that affects dust removal efficiency, filament life, and equipment power consumption. Too low a density results in incomplete cleaning; too high a density makes filaments too rigid and may damage the workpiece surface.
II. Measured Data: Density-Efficiency Curve
The following data is based on laboratory standard testing conditions (workpiece: aluminum plate surface, dust: ISO 12103-1 A2 test dust, roller diameter 100mm, speed 800rpm):
| Fill Density (holes/cm²) | Single-Pass Removal Rate | Filament Wear Rate (g/100h) | Motor Power Increase |
|---|---|---|---|
| 2 | 62% | 0.8 | Baseline |
| 4 | 78% | 1.2 | +15% |
| 6 | 89% | 1.8 | +32% |
| 8 | 94% | 2.6 | +55% |
| 10 | 96% | 3.8 | +85% |
Key Finding: Going from 6 to 8 holes/cm² only increases dust removal by 5 percentage points, but filament wear increases by 44% and power consumption by 23%. This indicates a "cost-effectiveness inflection point" — beyond which the marginal benefit of increasing density diminishes significantly.
III. Selection Formula and Engineering Recommended Values
Recommended fill density calculation formula: D = K × (P × R) / (V × d), where D is the recommended density (holes/cm²), K is the working condition coefficient (general dust removal 1.0, precision dust removal 1.3, heavy-duty cleaning 0.7), P is dust adhesion strength, R is roller diameter (mm), V is linear speed (m/s), d is filament diameter (mm).
Engineering quick-reference values:
| Application Scenario | Recommended Density (holes/cm²) | Recommended Filament Diameter (mm) |
|---|---|---|
| Electronic panel dust removal | 6~8 | 0.15~0.25 |
| Metal sheet cleaning | 4~6 | 0.3~0.5 |
| Solar PV module cleaning | 3~5 | 0.2~0.3 |
| Heavy-duty rust/paint removal | 2~4 | 0.5~1.0 |
Summary: Higher fill density is not always better. A balance must be found among dust removal efficiency, filament life, and equipment power consumption. It is recommended to first conduct sample trial production and small-batch validation to confirm the optimal density before mass production.
I. Solar PV Module Surface Characteristics and Cleaning Challenges
Solar PV module surfaces feature a tempered glass + anti-reflective (AR) coating structure, with cleaning requirements fundamentally different from general industrial surfaces: cleaning must not scratch the glass, not wear the AR coating, and not leave water marks. According to industry data, every 1g/m² increase in dust accumulation on PV panel surfaces causes approximately 0.5%~1% efficiency loss. In dusty northwestern regions, monthly dust accumulation can cause 10%~15% efficiency decline.
II. Core Brush Design Parameters
| Design Parameter | Recommended Range | Design Basis |
|---|---|---|
| Filament Material | PA612 or specialty PBT | Soft, won't scratch glass, UV aging resistant |
| Filament Diameter | 0.15~0.25mm | Sufficiently soft, won't produce micro-scratches |
| Spiral Arrangement Angle | 30°~45° | Balances axial dust pushing and cleaning uniformity |
| Contact Pressure | 0.3~0.8N/cm² | Ensures cleaning effectiveness while preventing coating wear |
| Roller Brush Speed | 200~500rpm | Matches cleaning robot travel speed (10~20m/min) |
III. Dry Sweeping vs. Wet Washing — Brush Selection Differences
Dry Sweeping Mode (for dusty regions): Prefer ultra-fine PA612 filaments (Ø0.15~0.20mm), medium fill density (4~5 holes/cm²), paired with electrostatic elimination devices to prevent airborne dust re-adhesion.
Water Washing Mode (for bird droppings, oil stain regions): Choose PBT filaments (excellent water resistance, water absorption ≤0.4%), filament diameter can be slightly thicker (Ø0.20~0.25mm), roller brush must work with water spray system for simultaneous washing and brushing. Note that PBT filaments have near-zero elongation in water, maintaining stable brush shape.
Summary: Solar PV cleaning brush design is not simply a "soft brush" — it is a cross-disciplinary engineering problem involving materials science, mechanical design, and PV operations & maintenance. We recommend conducting standard dust testing (referencing IEC 60068-2-68) before bulk procurement to verify the brush's cleaning efficiency and module wear under real working conditions.
I. Technical Requirements for AGV Chassis Cleaning
AGVs (Automated Guided Vehicles) operate continuously in factory and warehouse environments, where their chassis and drive wheels easily accumulate dust, metal debris, and oil stains, affecting navigation sensor accuracy and drive efficiency. AGV cleaning brush systems must balance cleaning effectiveness, low power consumption (without significantly affecting range), low noise (without affecting the work environment), and compact installation dimensions — four major requirements.
II. Disc Brush vs. Roller Brush: Comparative Analysis
| Comparison Dimension | Disc Brush | Roller Brush |
|---|---|---|
| Cleaning Coverage Width | Determined by diameter (typically 150~300mm) | Determined by length (customizable 300~1200mm) |
| Installation Space | Smaller, fits under chassis | Requires length space along travel direction |
| Cleaning Uniformity | Difference between center and edge | Axially uniform, better consistency |
| Power Consumption | Lower (radial rotation) | Higher (long axial length, higher torque) |
| Noise Level | 55~65dB | 60~72dB |
| Recommended Filament | PA612 / PP (wear-resistant) | PA612 / PBT (flexible version) |
III. Key Installation and Maintenance Points for AGV Brushes
1. Installation Position Selection: Disc brushes are preferentially installed in front of drive wheels to clear obstacles on the wheel path; roller brushes are suitable for installation at the chassis front edge as a "dust-pushing barrier".
2. Filament Wear Compensation: AGV filaments are consumables. It is recommended to set a filament length warning threshold (typically replace when remaining filament length is below 40% of initial) and design quick-release structures for easy replacement.
3. Coordination with Navigation Systems: Cleaning brush operation may generate vibration and electromagnetic interference (especially steel wire brushes). Maintain a safe distance from the AGV's LiDAR and vision sensors to avoid interference with positioning accuracy.
Summary: AGV chassis cleaning solutions should be customized based on factory floor material (epoxy floor / emery aggregate), dust type (metal chips / paper debris / oil stains), and AGV model. Disc brushes are suitable for small AGVs and localized cleaning; roller brushes are suitable for large AGVs and full-coverage cleaning.
I. Overview of Industrial Brush Performance Testing System
Industrial brushes must pass four core tests before factory delivery: abrasion resistance test, thermal aging test, chemical media resistance test, and dimensional stability test. These tests not only ensure product quality but also serve as critical basis for customer acceptance and industry certifications (such as ISO 9001).
II. Abrasion Resistance Testing — TABER Abrasion Test
The TABER abrasion test is the standard method for industrial brush abrasion resistance (referencing ASTM D4060 and ISO 5470-1). Testing uses CS-10 or H-18 abrasion wheels under standard load (500g or 1000g) on filament samples for a specified number of cycles (typically 1000~5000 cycles), calculating the wear index by weighing mass difference before and after abrasion.
Acceptance Criteria:
- General industrial dust removal brush: Wear index ≤ 50mg/1000 cycles
- Precision polishing brush: Wear index ≤ 25mg/1000 cycles
- Heavy-duty rust removal brush (steel wire): Wear index ≤ 120mg/1000 cycles
III. Thermal Aging Test
Place filament samples in a high-temperature oven and continuously age them at the material's nominal maximum operating temperature for 168 hours (7 days), then test filament flexural strength retention rate and color difference change.
Judgment Criteria: Flexural strength retention rate ≥85% is acceptable; color difference ΔE≤5.0 is visually acceptable. For PA series materials, additional moisture-absorbed performance change testing (hygrothermal aging test) is required under conditions of 85°C/85%RH/96 hours.
IV. Chemical Media Immersion Test
Completely immerse filament samples in chemical media corresponding to working conditions (such as 10% sulfuric acid, 10% sodium hydroxide, acetone, cutting fluid, etc.) at 23±2°C for 72 hours, then test weight change rate and strength change rate after removal.
| Material | 10% H₂SO₄ | 10% NaOH | Acetone | Cutting Fluid |
|---|---|---|---|---|
| PA612 | △ | ○ | ◎ | ◎ |
| PBT | ◎ | △ | ○ | ◎ |
| PP | ◎ | ◎ | △ | ◎ |
| PEEK | ◎ | ◎ | ◎ | ◎ |
◎ Excellent (weight change <2%) ○ Good (2~5%) △ Fair (5~10%)
Summary: Performance testing is not just a "formality" — it is the last line of defense ensuring brushes operate stably over the long term under real working conditions. We recommend customers clearly specify testing standards and acceptance criteria in bulk procurement contracts, and reserve the right for third-party testing.
I. Industrial Brush Industry Standards System
Currently, China's industrial brush sector primarily follows the following standard systems:
| Standard Number | Standard Name | Scope of Application |
|---|---|---|
| GB/T 30420-2013 | Industrial Brushes — General Technical Specifications | Classification, technical requirements, test methods for industrial brushes |
| JB/T 12548-2015 | Industrial Brushes — Roller Brushes | Dimensional tolerances and dynamic balance requirements for roller brushes |
| JB/T 12549-2015 | Industrial Brushes — Strip Brushes | Strip brush cross-section dimensions and installation fit tolerances |
| GB/T 4742-1984 | Domestic Brushes — Test Methods | Some test methods can be referenced for industrial brushes |
| ISO 8620:1986 | Brushes — Terminology | International standard brush terminology cross-reference |
II. Interpretation of Key Technical Requirements
1. Filament Retention Force (GB/T 30420): For tufted brushes, the pullout force of a single filament must not be less than 80% of the nominal value. This is a key indicator of brush manufacturing quality, directly affecting whether "shedding" occurs during use.
2. Dynamic Balance Accuracy (JB/T 12548): The residual unbalance of a roller brush at rated speed must not exceed G6.3 grade (ISO 1940/1 standard). Poor dynamic balance leads to increased equipment vibration and premature bearing failure.
3. Filament Outer Diameter Tolerance (JB/T 12548): Filament outer diameter tolerance should be within ±3% of the nominal value. Exceeding this range affects dust removal contact pressure consistency, resulting in uneven cleaning results.
III. Cross-Reference with International Standards
For foreign trade and export certification, the following international standard correspondences must be observed:
- EU Market: Must comply with REACH Regulation (EC 1907/2006) regarding chemical registration requirements for filament materials
- US Market: Some food-grade brushes must comply with FDA 21 CFR provisions on food contact materials
- Japan Market: Some electronics industry brushes must comply with JIS Z 9110 cleanroom-related standards
Summary: Standards compliance is not a one-time task. Different industries and export destinations have widely varying requirements for brushes. We recommend clarifying target markets and industry certification requirements during the product design phase to avoid costly post-production modifications.