Biofibre® Silva
Biofibre® Silva - virgin
Biofibre® Silva - recycle
The Biofibre® Silva product group contains the essence of Biofibre®. These are compounds based on a biopolyester matrix and wood fibers. The name “Silva” is based on the Latin origin for “forest” and thus symbolizes the importance of the naturalness of this product group.
Why and when to use Silva?
- Food contact and toy industry approved (AIJU Spain)
- Natural look & feel
- Potent. compostable (industrial; all binder ingredients: DIN EN 13432)
- For a variety of processing methods, e.g. injection molding, 3D printing, blow molding
- Substitute for e.g. PS, PET
- Application examples: Commodity products, rigid packaging, toy industry
Exemplary overview of characteristic data – adjustments/variations within the product class possible
1 Mechanical properties *1
| Material property | Value | Unit | Test method | Comment |
|---|---|---|---|---|
| E-Modulus | 3200 | MPa | DIN EN ISO 527-2 | Tensile testing (1 mm/min) |
| Yield Strength | 39 | MPa | DIN EN ISO 527-2 | Tensile testing (10 mm/min) |
| Strain at break | 1,8 | % | DIN EN ISO 527-2 | Tensile testing (10 mm/min) |
| Notched Impact Strength (Charpy) | 2,2 | kJ/m2 | ISO 179-1/1eA | fracture |
*1 mechanical testing on injection molded and standardized multipurpose test specimens (DIN EN ISO 527, Type 1A) conducted at standardized climate (23 °C, 50 % rel. humidity)
2 Thermal properties
| Material property | Value | Unit | Test method | Comment |
|---|---|---|---|---|
| Melt Flow Rate (MFR) | 23 | g / 10 min | DIN EN ISO 1133 | 190 °C / 2,16 kg |
| Melting range | 165 - 195 | °C | – | DSC, 10 °C / min |
| Heat deflection temperature (HDT) | 54 | °C | DIN EN ISO 75-2 | B (0,45 MPa)*2 |
*2 at 68 g minimum load (minimum load according to DIN EN ISO 75-2: 64 g)
3 Other features
| Material property | Value | Unit | Test method | Comment |
|---|---|---|---|---|
| Color | nature / brownish | – | colorable | |
| Density | 1,26 | g / cm3 | – | Injection molded part |
| Bulk density | 550 - 650 | kg / m3 | – | – |
| Water absorption capacity | Max. 2 | % | DIN EN ISO 62 | Related to dry sample |
| Primary processing method | Injection molding |
Biofibre® Silva reveals itself with excellent stiffness and strength and can be used for complex mouldings with long flow paths at low wall thicknesses.
Biofibre® Silva is available in standard quality or food grade according to requirements.
Sustainable and biobased!
- Engineering grade based on polypropylene and wood fibres
- Suitable for production of complex articles with long flow paths at very low wall thicknesses.
- Excellent processability, excellent surface finishing, dyeable with standard color masterbatches.
- Typical markets are within applications were high temperature resistance, very short processing times, and low density is desired
- Typical markets are within consumer articles, furniture industry, water-contact applications, automotive parts and rigid packaging.
- Drop-in for e.g. PP, HDPE
- Example: Flower pot with very thin walls
Further to:
Biofibre® Sustra