Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Features and Benefits
- Fast application
- Tough and resilient
- Maintains dimensional tolerance over time
- Low shrinkage, low exotherm
- Easy to cut and machine with carbide tools
- Machines with chips - low dust generation
- Low tool wear
- Remarkable profile of finished parts
- No settling in the equipment
- Easy to repair - bonds to itself
- Compatible with polyester sanding primers
- Constant hardness over time, after 24 hours, or after 6 months
Applications & Uses
- Markets
- Compatible Polymers & Resins
- Composites Processing Methods
- Applications
- Crestamould® T29 Extrudable exhibits anti-sag properties in bulk areas of up to 15mm in thickness. Do not apply the tooling paste thicker than 15mm at any one time to avoid excessive heat build-up/cracking. Apply uniformly and allow to gel, exotherm and cool down.
- When applying material in corners or edges, avoid applying over insufficiently cured material as this may induce a stress fracture over time.
- Tool marks are removed with 80-120 grit sandpaper. The surface needs no further preparation prior to sanding and primer application.
- Equipment
Crestamould® T29 Extrudable is dispensed through a suitable internal mix catalyst pumping system with a ram-type equipment. Recommended ram pressure is 40 psi. Dispensing rate is subject to ram and dispensing pressure being applied.
- Machining
Use carbide tools. End-mill tools are used for the majority of the work, ball-end tools for finishing. Adjust speeds to avoid overheating or overloading and material pull out. Do not leave the CNC unattended. Brush or blow off material as it accumulates on flat surfaces. If possible, blow air at tool-tip. A shop temperature of 24°C (75°F) and above will improve machining and reduce tool wear. Colder temperature will make the Crestamould® T29 Extrudable harder. Remove shavings daily from part and do not leave machine unattended when in use.
Properties
- Color
- Mechanical Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Hardness (after 24 hours) | 70 | Shore D | — |
| Glass Transition Temperature (Tg) | 90 | °C | — |
| Value | Units | Test Method / Conditions | |
| Viscosity (at 25°C, RV1 PP35Ti at 6) | 60,000 - 100,000 | mPa.s | — |
| Viscosity (at 25°C, RV1 PP35Ti at 0.6) | 500,000 - 1,000,000 | mPa.s | — |
| Gel Time (at 25°C, 100g at 2% M50) | 20 - 30 | Minutes | — |
| Peak Exotherm (100g mass) | max. 65 | °C | — |
| Density | 0.78 - 0.83 | g/cc | — |
Storage & Handling
- Shelf Life
- 9 Months
- Storage and Shelf Life
- Shelf life - If stored correctly, Crestamould® T29 Extrudable has a shelf life of 9 months.
- Storage - The product should be kept in securely enclosed containers. Storage should be in a dry place and out of direct sunlight. The temperature should be between 18-25°C (65-77°F). Allow material to reach shop temperature before using. Keep containers closed to eliminate styrene evaporation and to avoid change in properties..