ADDITIVES | POLYAMIDES
performance gap between pure glass fibre and pure mineral reinforced formulations and improve overall product perfor- mance, especially in regard to mechan- ical properties, dimensional stability, melt flow and moulded part surface
appearance.Germany’s Akro-Plastic recently developed a polyamide complying with European Union
regulation EN 45545-2, R6 HL 2 for fire protection of railway vehicles. Akromid C28 GF 25 FRT offers 170 MPa tensile strength and an elongation of 2.5%. Impact strength is above 60 kJ/m² and it has 30% higher flowability compared to
Above: The slats in this air vent for the BMW Mini are produced in a 30% glass reinforced heat stabilised PA6 from Akro- Plastic
PA66 GF 25 FR. The compound offers an 8% density saving over PA66, provides a good surface and can be custom coloured. The company also recently announced that its
Akromid B3 GF30 1 30% glass reinforced heat stabilised PA6 is now being used to produce the two part slats used in the BMW Mini Countryman car. It is the second commercial air vent application for the material, which was first used by truck manufacturer Scania. According to Akro-Plastic, the key challenge for the Mini application was to provide a high level of dimensional stability and stiffness while maintain- ing very tight production tolerances for smooth and effective operation. In addition, the parts had to be completely free of sink marks, even around the latching sections. Global PA66 producer Ascend Performance
Right; An automotive cooling water valve made by Mann+Hummel in Grivory HT1VA-35 HYS
Materials has developed a new Vydyne PA66 designed for automotive lightweighting applica- tions. Vydyne R433H is designed to reinforce down-gauged steel and aluminium used in vehicle body in white (BIW) structures, helping reduce weight without sacrificing safety or comfort. The company says that the new grade improves energy absorption over traditional glass-filled PA66, reducing noise, vibration and harshness (NVH) and absorbing impact energy from crashes. Using it in the BIW structure reinforces the sheet metal, helping manufac- turers to reduce weight and improve fuel efficiency. In electric vehicles, where lightweighting and NVH reduction are particularly important, R433H is expected to find application in battery frames and housings.
46 COMPOUNDING WORLD | February 2019
High performance PA Ultramid Advanced T1000 is the latest introduction to BASF’s high performance polyamide product line. Based on PA 6T/6I, Ultramid Advanced T1000 offers high strength and stiffness with mechanical properties remaining stable at temperatures of up to 120°C (dry) and up to 80°C (conditioned). Due to its partially aromatic chemical structure, it offers high resistance to humidity and to aggressive media – outperforming conventional polyamides and many other PPA materials on the market, according to the company. Advanced T1000 grades also show better resistance to chemicals than conventional aliphatic polyamides, including hot coolants, oils, aggressive fuels, and solutions of road salts containing calcium or zinc salts. Water uptake is also lower than many aliphatic polyam- ides, resulting in better dimensional stability. The new polymer is suitable for injection moulding and can be welded to itself and to other PA and PPA materials. BASF expects it to find application in automotive and other industries where resistance to humidity or chemicals is required. These include thermostat housings and water pumps, fuel circuits and selective catalytic reduction systems, actuators and clutch parts in cars, as well as coffee machines, furniture fittings and in construction applications such as water distributors, heating systems and pumps. Grivory HT is the latest addition to the EMS-
Grivory polyamide range and is claimed to provide the highest hydrolysis resistance at elevated temperatures. The material is targeted at uses requiring long term resistance to hot water, steam or cooling agents, making it suitable for automotive cooling systems and sanitary applica- tions. According to EMS-Grivory, the Grivory HT1VA grade shows 30% higher retained strength after 12,000 hours in water at 95°C than a tradi- tional PPA. Grivory HT can also be used in automo- tive electrical and electronic parts, where the ‘electro- friendly’ stabilisation technology prevents problems with salt efflorescence and the corrosion it causes under warm and moist conditions. Grivory HT is available in two versions – for use in automotive applica-
tions as well as applications requiring direct contact with food
www.compoundingworld.com
P
H
OTO: AKRO
-PLASTIC
PHOTO: EMS-GRIVORY
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70
