Switch to

A collaboration between Dow, Nexus Elastomer Systems and German RepRap enables designers to 3D-print colored parts using Dow’s Silastic 3D 3335 liquid silicone rubber (LSR) and companion colour packs from Mesgo Iride Colors.

read more

Safety for patient and user is an essential requirement for medical products, in-vitro diagnostics and pharmaceutical packaging. Subsequently, plastics grades used in medical have to fulfil particular requirements, i.e. constant properties, formulation lock or biocompatibility. Surprisingly, no standard has existed to define the requirements for medical grades so far. This gap has been filled recently by the new guideline VDI 2017 developed and launched by a work group of the German Engineer’s Society (VDI). This article addresses the development of the new guideline VDI 2017 “medical grade plastics” and presents the essential requirements to be covered by medical grade plastics (MGP).

read more

Modifications to the polymer chains by curatives, formed by sulfur and fragments of accelerators lead to polymer chain modifications in the elastomers. Emulsion styrene-butadiene rubber (E-SBR) samples, cured with tetramethylthiuram disulfide and sulfur (TMTD/S8), and zinc dialkyldithiophosphate with sulfur (ZDT/S8), were studied. They were characterized in detail in terms of crosslink density and crosslink structures.

read more

Liquid silicone rubber (LSR) is mainly processed by liquid injection molding (LIM) because the material is particularly suitable for this purpose due to its low viscosity during processing. The density of the vulcanizate is about 1.1 g/cm3. With the aid of foamed silicones, density reductions of 0.5 g/cm3 to 1.0 g/cm3 can be achieved. This reduces the material requirement and consequently also the price. In addition, the insulation behavior against heat and cold as well as the floatability can be positively influenced. The floatability is decisive for separation processes in the recycling of materials. In this study, the positive effect of expandable thermoplastic microspheres as blowing agents in LSR will be illustrated.

read more

At K 2019, Wittmann Battenfeld exhibited its injection moulding technologies, processes and applications under the motto “Enjoy Innovation”. Two of the applications presented by the Austrian machine manufacturer from Kottingbrunn were on the subject of elastomer processing. One of the application technology focal points at K 2019 was silicone injection moulding. A TPE application was also on display.

read more

Liquid silicone rubber (LSR) is a high-performance elastomer used in many markets and applications. New application trends require enhanced design flexibility, process efficiency and co-molding using combinations of different material types. In co-molding applications, the cure temperature of LSR is inherently limited by the thermal stability of the overmolded counterpart, and conventional high process temperatures often cannot be used. A new generation of low temperature cure (LTC) LSR materials that cure between 90 °C and 120 °C can overcome those co-molding challenges and enable new designs and applications.

read more

LG Chem announced Thursday (7 November 2019) it has opened a technical service and development center in Osan, Gyeonggi Province, marking the country’s largest petrochemical technology center. The chemical affiliate of LG Group invested KRW 110 billion (USD 94.8 million) in establishing the center, it said. The center will be used for developing technical solutions and offering other forms of support for the company’s contractors and clients.

read more
The ‘butterfly’ smartphone holder (Source: Momentive)

At K 2019, Momentive Performance Materials Inc. showcased its portfolio of Silopren liquid silicone rubber and other silicone elastomer solutions. According to the company, the new self-bonding Silopren LSR 27x9 family addresses the rising demands for hard-soft designs, helps to achieve the bonding between silicone and thermoplastics, reduces assembly steps, and meets various complex design requirements. The products are said to offer primer-less adhesion to many PC, PBT and copolyester substrates in commercial hard-soft combinations.

read more
Automatically centering cross head (Source: Troester)

For more than 125 years, Troester GmbH & Co. KG, Hanover, Germany, has been developing and manufacturing innovative and reliable machines for the rubber industry. AT K 2019 process and manufacturing specialists will be on hand to discuss the latest developments with visitors at stand F40 in hall 16.

read more

Croda announced that its Polymer Additives business is now part of Croda Smart Materials, offering its customers extensive polymer expertise and multiple technology platforms. At K 2019, the company is celebrating half a century of experience in amide production and the opening of its GBP 27 million amide manufacturing facility at its site in the United Kingdom.

read more

This article describes a class of novel smart materials known as mechano-adaptive composites. Mechanical adaptability is realized by exploiting the polymorphic phase transition characteristics of certain abundantly available inorganic filler particles incorporated in the elastomer matrix.

read more