Description
ECP 104/4264 is a proprietary TBA injection moulding compound utilising special Carbon Black and mineral filler to give a permanently highly conductive material. The compound is designed to comply with the electrical conductivity requirements for materials laid out in Defence Standard (59-98) and BS IEC 61340-5-1:2007.
APPLICATIONS
Mouldings made from ECP 104/4264 exhibit excellent dimensional stability.
Typical applications include:
- Production aids for the electronics industry (eg. storage boxes bins and PCB racks)
- Audio/Hi-Fi accessories
- Static dissipating equipment housing and components requiring shielding and very conductive properties
PROPERTIES
Surface Resistivity (ohms/sq.) <50 (ASTM D-257)
Specific Gravity (g/cc) 1.16
Tensile Strength (Mpa) 21.0
Tensile Modulus (Gpa) 2.4
Flexural Strength (Mpa) 38.0
Flexural Modulus (Gpa) 2.2
Impact Strength:
Izod (J/m) 41.0
Charpy UN-N (KJ/m ) 25.0
Charpy N (KJ/m ) 7.0
Deflection Temperature
Under Load (°C) 102.0 at 0.45 Mpa
(°C) 85.0 at 1.81 Mpa
Melt flow index 230°C
dg./min. 10Kg Load 10-20
Shrinkage (%) 1.0 – 1.5
RECOMMENDED PROCESSING CONDITIONS
MACHINE
It is recommended that an in-line reciprocating screw machine be used to injection mould ECP 104/4264, but it is possible to process this material on plunger injection moulding machines.
CYLINDER TEMPERATURE
180-230°C. The optimum cylinder temperature will depend upon the size and complexity of the moulding.
MOULD TEMPERATURE
30-50°C. The optimum mould temperature will depend upon the size and complexity of the moulding.
MOULD DESIGN
Moulds should be designed to obtain rapid filling, and multiple gates for large area mouldings are recommended with the gate positioned to avoid possible formation of weld lines.
MACHINE AND MOULD WEAR
The intensive compounding action which takes place during the manufacture of ECP 104/4264 ensures encapsulation of the reinforcement in polymer. This tends to minimise wear on injection screws and moulds. There is no evidence to show that ECP 104/4264 causes corrosion of mould steels.
MOISTURE
ECP 104/4264 absorbs moisture, therefore, prior to moulding please ensure thorough drying (ie, 90°C for 4 hours). Materials should be re-dried if all the material is not used within 2-3 hours of opening the bag. Excess moisture may show as splash marks on the surface of the finished mouldings. If necessary, the material should be re-dried at 80 – 90°C in shallow trays for 2-3 hours. Other forms of drying of equivalent effect are also suitable.
USE OF REGRIND
Runner’s sprues and scrap mouldings can be reground and blended with virgin materials. Regrind additions should not exceed 10% by weight of the virgin material otherwise some reduction in properties may be experienced.
HEALTH & SAFETY
CAUTION – THIS MATERIAL IS ELECTRICALLY CONDUCTIVE
As this material does not have the insulting properties normally associated with polymers, due safety precautions must be taken in use and it is recommended that all products made from this material are suitably labelled. Polypropylene based materials are stable at ambient and normal processing temperatures and can be processed safely in moulding and extrusion equipment at up to 235°C.
INFORMATION IN THIS PUBLICATION AND OTHERWISE SUPPLIED TO USERS IS BASED UPON OUR GENERAL EXPERIENCES AND IS GIVEN IN GOOD FAITH, BUT BECAUSE OF THE PARTICULARS WHICH ARE OUTSIDE OUR KNOWLEDGE AND CONTROL AND AFFECT THE USE OF THE PRODUCT, NO WARRANTY IS GIVEN OR IS IMPLIED WITH RESPECT TO SUCH INFORMATION. FREEDOM FROM PATENT RIGHTS MUST NOT BE ASSUMED.
