Application of Fiberglass Powder in Coatings
Overview
Fiberglass powder (glass fiber powder) is an important functional filler widely used in various coatings. Due to its unique physical and chemical properties, it significantly enhances the mechanical performance, weather resistance, functionality, and cost-effectiveness of coatings. This article details the diverse applications and advantages of fiberglass powder in coatings.
Characteristics and Classification of Fiberglass Powder
Key Characteristics
High tensile strength and crack resistance
Excellent corrosion and wear resistance
Good dimensional stability
Low thermal conductivity (suitable for thermal insulation coatings)
Common Classifications
By mesh size: 60-2500 mesh (e.g., premium 1000-mesh, 500-mesh, 80-300 mesh)
By application: Water-based coatings, anti-corrosion coatings, epoxy floor coatings, etc.
By composition: Alkali-free, wax-containing, modified nano-type, etc.
Main Applications of Fiberglass Powder in Coatings
Enhancing Mechanical Properties
Adding 7%-30% fiberglass powder to epoxy resins, anti-corrosion coatings, or epoxy floor paints significantly improves tensile strength, crack resistance, and shape stability.
| Performance Improvement | Effect Level |
| Tensile strength | Excellent |
| Crack resistance | Good |
| Wear resistance | Moderate |
Improving Film Performance
Studies show that when the fiberglass powder volume fraction is 4%-16%, the coating film exhibits optimal gloss. Exceeding 22% may reduce gloss. Adding 10%-30% enhances film hardness and wear resistance, with the best wear resistance at 16% volume fraction.
| Film Property | Effect Level |
| Gloss | Moderate |
| Hardness | Good |
| Adhesion | Stable |
Special Functional Coatings
Modified nano fiberglass powder, when combined with graphene and epoxy resin, can be used in anti-corrosion coatings for construction steel in highly corrosive environments. Additionally, fiberglass powder performs well in high-temperature coatings (e.g., 1300°C-resistant glass coatings).
| Performance | Effect Level |
| Corrosion resistance | Excellent |
| High-temperature resistance | Good |
| Thermal insulation | Moderate |
Environmental and Process Compatibility
Premium 1000-mesh wax-free fiberglass powder is specifically designed for water-based and eco-friendly coatings, meeting environmental standards. With a wide mesh range (60-2500 mesh), it can be selected based on coating requirements.
| Property | Effect Level |
| Environmental friendliness | Excellent |
| Processing adaptability | Good |
| Cost-effectiveness | Good |
Relationship Between Fiberglass Powder Content and Performance
Optimal Addition Ratio: Research indicates that a 16% volume fraction achieves the best balance, providing excellent gloss, hardness, and wear resistance.
Precautions
Excessive addition may reduce coating fluidity or degrade microstructure. Studies show that exceeding a 30% volume fraction significantly impairs film performance.
|
Coating Type |
Fiberglass Powder Specification | Addition Ratio | Main Advantages |
| Water-based Coatings | Premium 1000-mesh wax-free | 7-10% | Excellent environmental performance, strong weather resistance |
| Anti-corrosion Coatings | Modified nano fiberglass powder | 15-20% | Superior corrosion resistance, extends service life |
| Epoxy Floor Paint | 500-mesh | 10-25% | High wear resistance, excellent compressive strength |
| Thermal Insulation Coatings | 80-300 mesh | 10-30% |
Low thermal conductivity, effective insulation |
Conclusions and Recommendations
Conclusions
Fiberglass powder is not only a reinforcing filler in coatings but also a key material for enhancing cost-performance ratios. By adjusting mesh size, addition ratio, and composite processes, it can impart diverse functionalities to coatings.
Through proper selection of fiberglass powder specifications and addition ratios, the mechanical properties, weather resistance, functionality, and cost-effectiveness of coatings can be significantly improved to meet the demands of various applications.
Application Recommendations
Select the appropriate fiberglass powder specification based on coating type:
For fine coatings, use high-mesh powder (1000+ mesh).
For filling and reinforcement, use low-mesh powder (80-300 mesh).
Optimal addition ratio: Maintain within 10%-20% to achieve the best balance of performance.
For special functional coatings (e.g., anti-corrosion, thermal insulation), consider using modified fiberglass powder or composite materials (e.g., combined with graphene or epoxy resin).
Post time: May-12-2025
