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Elastomer O-rings can remain leak-tight under purely static conditions even when compression stress relaxation, compression set and mechanical properties already indicate far advanced degradation. For this reason, a modified leakage test involving a small and rapid partial decompression of the seal was developed that enables determining an end-of-lifetime criterion for O-rings with a safety margin for thermal shrinkage and vibrations.

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For the market launch of its new micro-injection unit for liquid silicone rubber at the virtual trade fair Engel live e-xperience from 13 – 16 October 2020, Engel produced precision components for the field of ophthalmology with an individual part weight of 0.0013 g.

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1,3-ethylene thiourea (ETU), an efficient curing agent for polychloroprene rubber (CR) and widely used accelerator for EPDM has been classified as a substance of very high concern (SVHC) after REACH evaluation. The French chemicals producer MLPC International has launched a complete study to identify the most appropriate safe replacement solution. A solution based on Bis-dimercapto-thiadiazole (Bis-DMTD) has proved most suitable.

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SPE has announced its Call for Technical Papers for Antec 2021. According to SPE, the event attracts over 3,000 plastics professionals from around the world with job functions encompassing managers, engineers, research and development, academia, operations, and consulting. Technical papers submitted for consideration for presentation at Antec 2021 will focus on the latest in industrial, national laboratory and academic work.

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BBG has presented a concept for HP-RTM molds that allows for the quick and reproducible manufacturing of compact, modular hydrogen tanks, which are made of carbon-fiber reinforced plastics (CFRP) and can be used in many vehicle types. The tank modules are autonomously produced in self-closing molds. The process does not require a press or further production equipment, such as autoclaves for curing, said the company.

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In the tire industry, cobalt salts and resorcinol resins are commonly part of mixtures for steel cord adhesion. However, regarding sustainability, work safety and environmental issues, these compounds have been increasingly considered as critical in recent years. Within the scope of a joint research cooperation, Brüggemann and Allnex developed a product that allows the elimination of both cobalt and resorcinol from steel cord adhesion mixtures.

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In response to the new report “Biodegradable and compostable plastics – challenges and opportunities” by the European Environment Agency (EEA), European Bioplastics (EUBP) highlighted the need to acknowledge successful precedents in the deployment of these innovative materials in collaboration with a receptive community of consumers. Unfortunately, several media outlets made use of a biased interpretation of the report to draw a distorted picture of biodegradable and compostable plastics.

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The replacement of steel car doors by Mg/Al doors for light-weighting results in electrochemical corrosion of the EPDM sealing profiles. This can be remedied, if the volume resistivity of EPDM profiles is increased by a reduction of carbon black content to below its percolation threshold. In this paper, the influence of different carbon black types onto the overall electrical and mechanical properties of the final compounds is reported.

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Lehmann&Voss&Co. expands its existing portfolio of hollow microspheres with a new grade of ultrafine particle size under the brand Tri-Spheres 45XS Ultra. The silica-based multicellular hollow spheres serve as functional lightweight fillers and are characterised by high thermal and mechanical resistance as well as bright colour. They can be used in a wide range of applications to reduce density and weight and to optimise acoustic and thermal insulation.

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Virginia Tech researchers have discovered a novel process to 3D print latex rubber, unlocking the ability to print a variety of elastic materials with complex geometric shapes. 3D printed latex has been documented only a handful of times in scientific literature. None of the previous examples come close to the mechanical properties of the latex printed by an interdisciplinary team affiliated with the Macromolecules Innovation Institute (MII), the College of Science, and the College of Engineering.

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