Description
ECP 104 is a proprietary TBA ECP injection moulding compound utilising special Carbon Black and mineral filler to give a permanently conductive material. The compound is designed to comply with the electrical conductivity requirements for materials laid out in Defence Standard (59-98) and BS EN 61340-5-1: 2010
APPLICATIONS
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.) 10 typ (DIN 53482)
Specific Gravity (g/cc) 1.16
Tensile Strength (Mpa) 27.0 (ISO 527)
Elongation at break (%) 6 (ISO 527)
Flexural Strength (Mpa) 45.0 (ISO 178)
Flexural Modulus (Gpa) 1.8 (ISO 178)
Impact Strength:
Izod N (KJ/m2) 14.0 (ISO 180)
Charpy UN-N (KJ/m ) 25.0
Charpy N (KJ/m ) 7.0
HDT:
Under Load (°C) 105.0 at 0.45 Mpa (ISO 75 methodA)
(°C) 85.0 at 1.81 Mpa
Melt flow index 230°C 5Kg Load 10.0
dg./min. 10Kg Load 57.0 (ISO 1133)
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, 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 & MOULD WEAR
The intensive compounding action, which takes place during the manufacture of ECP 104, 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 causes corrosion of mould steels.
MOISTURE
ECP 104 absorbs moisture, therefore, prior to moulding please ensure thorough drying (i.e., 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 these 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
Runners 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.
