SILIPLAST HE - Zschimmer & Schwarz

SILIPLAST HE
Thermoplastic injection moulding binder
for stainless steel powder
Chemical basis:
Modified polyalcohols
Characteristics:
Appearance: yellow-brown pellets
Solubility: 65 % water-soluble
Density (20 °C): approx. 1.2 g/cm³
Melting point: approx. 115 °C
Viscosity (160 °C): approx. 2200 mPas
Residue on ignition: max. 0.1 %
Shelf-life / Packaging:
12 months under proper and dry storage (max. 30 °C)
drums of 45 and 100 kg
Application:
SILIPLAST HE is a ready-to-use binder for the high-pressure injection moulding of stainless steel
powder.
By using SILIPLAST HE the powder is transformed into a flowing state allowing injection moulding
under influence of temperature and pressure.
The good wetting properties of SILIPLAST HE allow a low dosage of binder and act against
possible separating phenomena.
Due to the thermal stability in the application of SILIPLAST HE, also sprue and rejected material
can be used again. A large application field leads to a decrease of raw material and/or oscillation
of technical procedure. The high green strength of the parts injection moulded with SILIPLAST HE
assures a nondestructive further transport.
The careful debinding allows the removal of the binder within short time without damaging the
microstructure of the moulded part.
The waste- and decomposition products arising from the debinding process are toxicologically
non-hazardous.
The required addition quantity depends on the composition of the mix as well as on the particle
size distribution, and for stainless steel powder it is about 7.0 weight-%.
The above results have been obtained from trials in our laboratory and plant. In the light
of changing conditions they can serve only as a guide and are therefore offered without
obligation. We ask you to observe the possible rights of third parties.
Issued:
16. January 2014
Page:
1 / 2

SILIPLAST HE
The temperature of the mix necessary for the production of feedstocks depends on the
corresponding preparation plant and should range between 140 and 150 °C.
The temperatures for the injection moulding machine in general range at approx. 140 °C (+/- 5 °C)
for the absorbtion zone, for the nozzle at approx. 160 °C (+/- 5 °C) and for the tool at approx. 50 °C
(+/- 5 °C).
By storing the parts in a water bath, a part of the binder is dissolved. Up to 65 % of the binder
can be removed (calculated on 100 % binder). The time of the water bath is depending on the
geometry and density of the moulded part (recommendation: approx. 24 h at water bath
temperature of 70 °C, for a body thickness of approx. 3 mm).
Through the channels built by this procedure the remaining part of binder can then be easily
removed in the following sintering process.
The arising waste water is well biodegradable.
The reaction products resulting during the sintering process may be added to a further burning.
Note:
Recommended storage temperature: approx. 20 °C.
The above results have been obtained from trials in our laboratory and plant. In the light
of changing conditions they can serve only as a guide and are therefore offered without
obligation. We ask you to observe the possible rights of third parties.
Issued:
16. January 2014
Page:
2 / 2