Top-Performing PU Binders
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- Issue Time
- Apr 2,2025
Summary
At FieldsMaster, we specialize in manufacturing high-quality EPDM granules and advanced PU binders for sports flooring applications.
At FieldsMaster, we specialize in manufacturing high-quality EPDM granules and advanced PU binders for sports flooring applications. Our products are trusted by contractors, architects, and facility managers worldwide, ensuring durable, safe, and aesthetically pleasing surfaces for playgrounds, running tracks, and sports fields.
In this blog, we’ll dive into our two flagship PU binders, explain how to adjust their hardness, and discuss key certifications that ensure safety and performance.
Our Top-Performing PU Binders
FM-PU 1185
Aliphatic Binder – Non-Yellowing
First choice for bright colored epdm granules
Aliphatic Binder – Non-Yellowing
First choice for bright colored epdm granules
Maintains clarity and brightness in high-temperature climates
Enhanced flexibility and weather resistance
Best For:
Outdoor sports surfaces (playgrounds, running tracks)
Outdoor sports surfaces (playgrounds, running tracks)
High-end projects requiring long-term color stability
FM-PU 8004
Aromatic Binder / MDI Binder
Aromatic Binder / MDI Binder
Strong adhesion for EPDM granules
Cost-effective solution for standard applications
Excellent mechanical strength and durability
How to Adjust the Hardness of PU Binder?
1. NCO (Isocyanate) Content
Higher NCO content → Harder material (more cross-linking, denser structure).
Lower NCO content → Softer material (longer polymer chains, more flexible).
Note: Too low NCO may reduce bond strength, so balance is key.
2. Polyol Selection & Molecular Weight
High-molecular-weight polyols → Softer, more elastic PU.
Low-molecular-weight polyols → Harder, more rigid PU.
3. Curing Conditions
Higher temperature curing → Faster reaction, harder result.
Lower temperature curing → Slower reaction, softer result.
4. Plasticizers (For Softening)
Adding plasticizers increases flexibility but may reduce bond strength if overused.
Takeaway:Softer PU = Lower NCO, higher polyol MW, plasticizers.
Harder PU = Higher NCO, lower polyol MW, controlled curing.
Essential Certifications for PU Binders
To ensure safety, environmental compliance, and performance, our PU binders meet:
✅ PAHs (Polycyclic Aromatic Hydrocarbons) Free – Safe for children’s playgrounds.
✅ Low VOCs (Volatile Organic Compounds) – Eco-friendly, minimal odor.
✅ REACH & RoHS Compliant – Free from hazardous substances.
✅ EN71-3 Certified – Safe for toys and children’s areas.
These certifications guarantee that our binders are non-toxic, durable, and suitable for global markets.
Why Choose FieldsMaster?
✔ 26+ Years of Expertise in EPDM & PU binder manufacturing.
✔ Customizable Solutions – Adjust hardness, color, and performance.
✔ Global Certifications – Safe for sports, schools, and public spaces.
✔ Sustainable Production – Eco-friendly processes with minimal emissions.
