Polymer Slurry PS PI1 Polyimide

Polymer Slurry PS PI1 Polyimide has these features and benefits:

• solid polyimide feedstock at room temperature
• dark orange finishing
• excellent dispersion of polyimide with particle size <25 microns
• high polyimide content with good flow at injection temperature (>160ºC)
• biomedical quality for minimum microporosity after sintering
• minimum expansion coefficient and wide temperature interval of debinding to prevent micro-fractures
• based on 3Dresyn EB1, Eco Binder for water debinding and sintering of Ceramic, Metal & Polymer powder slurries
• injectable in 3D printed durable or sacrificial injection molds
• ideal debinding and sintering without defects since most of the debinding is done with water
• part of the binder has good water solubility for debinding without imperfections nor cracking
• part of the binder is not water soluble but exhibits excellent thermal debinding without imperfections nor cracking
• controlled and reproducible process shrinkage
• minimum expansion coefficient to prevent micro-fractures
• relative low slurry viscosity, good flow
• very high resolution of 20 microns of final products
• suitable for polymer slurry jetting
• eco friendly process
• organo-tin free
• supplied in temperature resistant containers for heating and melting the binder at 150-160ºC
• water and low temperature debinding and sintering at 360ºC
  
• excellent chemical resistance to most chemicals, including strong oxidizing and reducing agents and strong acids and alkalis
• very high mechanical strength
• very high impact resistance
• very high creep resistance even at elevated temperatures
• low friction coefficient <0.2 for reduced abrasion

Typical properties after sintering

• Tensile modulus 360 MPa ISO 527-1/-2
• Stress at break 140 MPa ISO 527-1/-2
• Strain at break <10% ISO 527-1/-2
• Tensile creep modulus, 1h 3400 MPa ISO 899-1
• Tensile creep modulus,1000h 2700 MPa ISO 899-1
• Charpy impact strength, +23°C 122C kJ/m² ISO 179/1eU
• Charpy notched impact strength, +23°C 7C kJ/m² ISO 179/1eA
• Shore D hardness,15s 90 ISO 7619-1
• Glass transition temperature, 10°C/min 335-340ºC ISO 11357-1/-2
• Temp. of deflection under load, 1.80 MPa 320°C ISO 75-1/-2
• Temp. of deflection under load, 0.45 MPa 340°C ISO 75-1/-2
• Coeff. of linear therm. expansion, parallel 41 E-6/K ISO 11359-1/-2
• Relative permittivity, 100Hz 3.5 IEC 62631-2-1
• Relative permittivity, 1MHz 3.4 IEC 62631-2-1
• Dissipation factor, 1MHz 80 E-4 IEC 62631-2-1
• Volume resistivity>1E13 Ohm*m IEC 62631-3-1
• Electric strength 34 kV/mm IEC 60243-1
• Density 1380 kg/m³ ISO 1183

• Slurries can be poured hot in metal cartridges of 22 or 25 mm external diameter for direct injection in low cost manual injection machines such as this type of manual injection equipment
• Slurries can be injected in 3D printed molds made with our durable and/or sacrificial 3D resins
• after demolding green parts are obtained

1. First step: water debinding at 65ºC for 5 hours
2. Second step. thermal debinding with Argon atmosphere:
1. Insert flask in the preheated oven at 65ºC
2. Ramp 2ºC/ minute up to 220ºC
3. Hold at 220ºC for 60 minutes
4. Ramp 2ºC/ minute up toup to sintering temperature of 350-380ºC
5. Hold at 350-380ºC for 30-60 minutes
6. Ramp -2ºC/ minute down to room temperature   

*Note: the final debinding and sintering cycle needs to be custom designed by customers to meet their process specifications; including their optimum debinding and sintering time, wihch depends on the thickness of prints, etc.