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RWSeptember2022

Mixing

   

Effect of accelerator mixing ratio on curing characteristics of EPDM gasket materials

In a four-person household, the washing machine is in operation about one and a half hours a day. On average, it washes, rinses and spins about 250 times a year, cleaning some 1,000 kilograms of dirty laundry, an amount that is increasing all the time. Its components, particularly the rubber hose systems and rubber gaskets, are subjected to greater chemical and mechanical stresses than just about any other household appliance. Moisture, detergents and cleaning agents, particularly alkaline agents, as well as high water temperatures must not have an adverse effect on the material. Due to the long service life of the washing machine, all polymer parts, especially rubber parts, need to have a service life of at least 10 years, which means excellent resistance to aging.

Extrusion

    

High efficiency twin screw extruder

The demand for performance and consistency of elastomer based compounds is growing quickly in all fields (tire, technical rubber goods, cables). Specifications regarding physical, mechanical and chemical properties, as well as “visual aspects” properties of the finished products are becoming more and more strict.
During compound production, all operations are involved, from the weighing to the storage of the semi-finished mixed compounds. The mixing operation plays a very important role, since it is the step where all ingredients are incorporated, dispersed and distributed.

Silicone & Medical

   

Silicone rubber from plant based materials

Industrial grade silicone rubber compounds whose precursors are derived from plant based raw materials will be introduced by Wacker at K 2022, the international trade fair for plastics and rubber taking place in Düsseldorf, Germany, October 19- 26. Wacker will unveil several biomethanol based product lines under the Elastosil eco umbrella, including one liquid and six solid silicone rubber grades, as well as selected Silmix silicone rubber compounds.

Molding

   

Alpine Advanced Materials introduces rapid prototype molding

Alpine Advanced Materials has introduced Rapid Prototype Molding (RPM) using Addifab’s proprietary resin system and Nexa3D’s printers to give clients a more rapid tool manufacturing solution that provides a functional and testable part at a fraction of the cost. Complementing Alpine’s suite of high-performance engineered materials and advanced design services, RPM Freeform Injection Molding delivers complex injection molded parts more quickly and affordably than when using standard steel molds.

Latex and Natural Rubber

   

Project management: Beauty and the beast

The origins for modern project management stem from the late 1950s, where the methodology was applied in aerospace, defense and construction. With the advent of IT (information technology), a formalized system of project management was developed and has taken a foothold in nearly every business. With the recent initiative to onshore glove manufacturing to the U.S., project management has now become a central framework for the construction, equipment validation and manufacturing initiatives which underpin U.S. based glove manufacturing capabilities.

The September Issue of Rubber World

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