Description
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
- density: 1.38 g/cm³
- water Absorption after 24 hours: <3%
- tensile strength: <230 MPa
- tensile modulus: <3000 MPa
- elongation at break: <100 %
- Izod impact Strength Notched: <900 J/m
- flexural Strength: <490 MPa
- Vicat softening temperature: >220ºC
- Coefficient of Friction COF: <0.6%
- Heat Deflection Temperature HDT at 1.8MPa: 320ºC
- service temperature. -270ºC-+400ºC
Recommended injection of slurries or feedstocks:
- 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
Recommended debinding and sintering process of green parts*:
- First step: water debinding at 65ºC for 5 hours
- Second step. thermal debinding with Argon atmosphere:
- Insert flask in the preheated oven at 65ºC
- Ramp 2ºC/ minute up to 220ºC
- Hold at 220ºC for 60 minutes
- Ramp 2ºC/ minute up toup to sintering temperature of 350-380ºC
- Hold at 350-380ºC for 30-60 minutes
- 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.