electrical & electronics | Technology
Properties of A. Schulman’s Schulamid 612 GF 33 H2 Property Density
Melt Volume-Flow Rate (MVR) (245°C/5.0 kg) Water Absorption (Saturation,23°C) Tensile Modulus
Tensile Stress (Break) Tensile Strain (Break) Flexural Modulus, 23°C
Charpy Notched Impact Strength -30°C 23°C
Heat Deflection Temperature 0.45 MPa, Unannealed 1.8 MPa, Unannealed
Dry 1.32 32.1 1.3
9500 170 3.0
9000
8.0 9.0
214 195
up against chemicals such as road salt and other materials that can damage the sensors. A. Schulman recently launched Schulamid 612 GF 33 H2, a PA612- based compound tailored to provide superior protective performance for automotive sensor housings. The new grade has low moisture absorption,
Below: New European
standard EN 45545 for fire protection on trains has spurred
development of new polyamide grades
improving dimensional and mechanical stability as well as reliability, the supplier says. It adds that, “while conventional housing materials such as PA66 show environmental stress cracking in contact with road salts like calcium chloride, A. Schulman’s new grade raises the chemical resistance of the housing and provides enhanced protection.” A grade with further improved flowability, Schulamid 612 GF 33 H2 SF, is available for even filigree designs, reducing the injection pressure and minimizing the stress on sensitive electronic parts during the moulding process. Also offering tailor-made products for the automo-
tive and E&E industries is Albis. Its Alcom portfolio includes technical compounds as well as masterbatch-
Conditioned – – –
8300 130 3.6 –
– 10.0
– –
°C °C
ISO 75-2/Bf ISO 75-2/Af
es for use in injection moulding. Albis recently added two more masterbatches to its own brand portfolio: Alperform Light Diffusion (based on a polycarbonate) and Alperform Light Blocking (ABS). Alperform LD is said to offer users a great deal of
flexibility to adjust light transmission and scattering during processing. “It’s a cost-efficient alternative for the production of diffusors for LED lighting applications made of polycarbonate,” says the company. Alperform LB, meanwhile, provides significantly increased light reflection and very low light transmission, making it ideal for the self-colouring of highly reflective and light-blocking LED light housings and reflectors made of ABS and PC/ABS.
New standards for trains Several companies have in recent months made play of their ability to produce flame retardant polyamides for electrical components that meet the new European standard EN 45545 for fire protection for rail vehicles. Independent compounders Eurostar, Lati, Nilit Plastics (now part of Celanese), and Vamp Tech are among them, and now polymer producer Evonik is another, with a new grade of polyamide 12. It says Vestamid LX9115 is distinguished by low toxicity and smoke density. Evonik says Vestamid LX9115 shows high dynamic
stress resistance and high impact resistance even at low temperatures. The new black coloured compound can be used in sensitive interior as well as exterior applications; the coloration does not affect the fire protection properties. In addition to rail applications, Vestamid LX9115 may be used in any other areas requiring a high degree of fire protection. DSM claims to be the first plastics producer in the world to offer a portfolio of materials that meet the
34 INJECTION WORLD | March/April 2017
www.injectionworld.com
Unit g/cm³
cm³/10min %
MPa MPa %
MPa kJ/m²
Test Method ISO 1183/A ISO 1133 ISO 62
ISO 527-2/1A/1 ISO 527-2/1A/5 ISO 527-2/1A/5 ISO 178
ISO 179/1eA
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