Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Fillers Included
- Polymer Name
- Technologies
Features & Benefits
- Materials Features
- key Characteristics
- Injection molding grade
- Biopolymer compound, mineral filled
- Can be blended with bamboo powder (B), rice husk (R), coffee husk (C), wheat straw (W) and wood powder (H)
- Balanced flexibility to rigidity, good impact properties
- Naturally heat-stable up to 95°C
- Biodegradable in controlled (e.g. industrial compost) und non-controlled conditions (e.g. landfill, soil, roadside)
- Easy to process / easy to eject
- Food contact safe
- Dishwasher-ok, microwave-ok
- Global availability.
Bioblend BT25S (B/R/C/W/H) HH is a bio-polymer polymerized of succinic acid and 1,4-butanediol. The compound is enhanced with a blend of natural mineral and organic fillers. The material can additionally be blended with bamboo powder, rice husk or coffee husk to support a natural look.
Bioblend BT25S (B/R/C/W/H) HH is designed to be completely biodegradable & compostable (microbial and enzymatic degradation) in the targeted disposal environment; it is biodegradable both in controlled (e.g. industrial compost factilities) and in non-controlled (e.g. soil, roadside, landfill) conditions.
The grade offers a significant reduction in carbon footprint compared to traditional fossil-based plastics. The material has got balanced stiffness values with good impact properties. Bioblend BT25S (B/R/C) HH offers a very good processability and flow with an easy ejection of parts from the mold. Cycle times can be kept short.
Part wall-thickness shall be greater than 1.2 mm.
- key Characteristics
Applications & Uses
- Applications
- Plastics & Elastomers End Uses
- Plastics & Elastomers Processing Methods
- Applications
Typical applications where Bioblend BT25S HH is used for are
- Consumer goods
- Kitchen ware (single use/season use cutlery, cups, boxes, trays, baby spoons)
- Toys
- Packaging, rigid packaging
- Personal care (tooth brush handle, soap box)
- Beauty (crème containers)
- Outdoor
- Process Guidelines
Bioblend BT25S (B/R/C/W/H) HH can be processed on conventional injection molding equipment. The material is sensitive to moisture and high temperatures (above 190°C); high shear rates shall be avoided. The matrial needs to be dried before processing.
- Drying
Dry the material for a minimum of 4 - 6 hours at 80o C. A moisture content of less than 0.07% (700 ppm) is required / less than 0.10% (1000 ppm) is recommended. Avoid exposing the material to atmospheric conditions after drying; process immediately.
- Injection Moulding Start-Up
- Vacuum-out/clean hopper and air-suction system to avoid contamination.
- Clean/purge the barrel.
- Once the barrel has been cleaned, reduce barrel temperatures to the right set points (see next section).
- Introduce the compounds into the barrel only after all barrel temperatures are at target set points. The material cannot enter into the barrel when temperatures are above 190°C in any section!
- Make sure that the mold is heated up to a temperature of around 50°C.
- Start with a moderate holding pressure and keep it applied for long initially.
- Start with long cooling times before opening the mold: tcooling (in sec) > biggest wall-thickness (in mm) x 10.
- After start-up, the injection molding process shall be optimized step-by-step to industry relevant process paramaters.
Properties
- Physical Form
- Typical Properties
- Processing Information (Injection Molding)
| Value | Units | Test Method / Conditions | |
| Density | 1.3´ | g/cm3 | — |
| Melt Flow Rate (190°C/2.16 kg) | 15 | g/10 min | ASTM D1238 |
| HDT-B (0.46 MPa) | 95 | °C | ASTM D648 |
| Melting Point | 115 | °C | ISO 3146 |
| Tensile Strength (50 mm/min) | 22.7 | Mpa | ASTM D638 |
| Flexural Strength | 36.1 | Mpa | ASTM D790A |
| Flexural Modulus (1% secant) | 1.2 | Gpa | ASTM D790A |
| Elongation at Yield (50 mm/min) | 18.7 | % | ASTM D638 |
| Elongation at Break (50 mm/min) | 18.8 | % | ASTM D638 |
| IZOD Notched Impact Strength (at 23°C) | 44.54 | J/m | ASTM D256 |
| Mold Shrinkage | 0.45 | % | — |
| Value | Units | Test Method / Conditions | |
| Hopper Temperature | 50 | °C | — |
| Feed Zone Temperature | 170 | °C | — |
| Compression Zone Temperature | 180 | °C | — |
| Metering Zone Temperature | 190 | °C | — |
| Nozzle Temperature | 185 | °C | — |
| Mould Temperature | 30-40 | °C | — |
| Screw Speed | Low – Medium | — | — |
| Injection Pressure | Medium | — | — |
| Holding Pressure | Low – Medium / Long | — | — |
| Injection Speed | Slow – Medium | — | — |
| Cooling Time | Medium - Long | — | — |
Storage & Handling
- Storage
Keep the material tightly closed in a dry and cool place. Keep away from heat and sources of ignition and avoid exposure to moisture, dampness. Do not stor outdoors. Use material within 6 month after delivery.