Polyurethane Binder (Specialty Paper & Nonwovens)
Waterborne polyurethane (WPU) binders are used in specialty paper and nonwoven manufacturing to provide superior mechanical strength, flexibility, and durability to paper substrates and fiber mats. They are applied in specialty technical papers, filter papers, medical papers, and composite nonwoven fabrics where conventional cellulose-based binders are insufficient. Polyurethane binders offer excellent abrasion resistance, wet strength, and chemical resistance.
Technical Specifications
| pH | 7.0–9.0 |
| appearance | White to milky aqueous dispersion |
| solid content (%) | 40±2 |
| viscosity (mPa·s, 25°C) | 100–500 |
| film elongation at break (%) | 300–800 |
Applications
- Technical and industrial specialty paper binder
- Filter paper and air filtration media binder
- Medical and hygiene nonwoven paper binder
- Sandpaper and abrasive substrate paper binder
- Impregnating resin for decorative and overlay papers
Key Features
- Excellent film flexibility and mechanical strength at low add-on
- Outstanding wet strength and water resistance for demanding applications
- VOC-free waterborne formulation for eco-compliance
- Adjustable hardness and elongation by blending different grades
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