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Preparation of polypropylene and skim natural rubber/thermoplastic natural rubber blends: Determining processing conditions

Centrifuged latex production in Sri Lanka contributes over 25% of the country’s annual total rubber production. This share is an increasing trend, when the production figures for the last decade are considered. During the centrifugation process, concentrated or creamed latex with dry rubber content of 60% is separated as centrifuged latex, and 5% to 10% of rubber available in the field latex is removed as the diluted fraction. It has 3% to 5% dry rubber content and a high amount of non-rubbers. This diluted fraction is known as skim latex, and the rubber extracted from acid coagulation of skim latex is referred to as skim natural rubber (SNR).

Company Profile

Making the green tire even greener

Michael Kempf, Head of Market Segment Tires & MRG at Evonik’s Silanes Business Line, outlines how the coupling agent XP Si 466 EXT boosts the sustainability of passenger car tires.

Extrusion

    

Guill Tool introduces a co-extrusion crosshead designed for irrigation tubing

Guill Tool introduces Series 824, a co-extrusion crosshead designed for irrigation tubing with an emitter tool.   Manufactured from stainless steel, this new crosshead features balanced flow design with spiral technology that improves flow characteristics at all extruder speeds.  Dual feed ports provide concentric compound flow, while the splits flow from one extruder to feed the inside and outside layers via a manifold assembly.   Series 824 is adaptable to all popular extruders on the market currently

Oil, Gas & Energy

  

Thermoplastic polymer has API 610 recognition

CDI Energy Products announced that its latest material to achieve API 610 recognition outperformed service life expectations under extremely corrosive sulfuric acid conditions. API 610 is the standard for centrifugal pumps for the petroleum, petrochemical and natural gas industries. CDI’s proprietary thermoplastic polymer composite, Dures 200, was the foundation for critical components developed for an API 610 vertical single casing diffuser pump (VS1) for a high production sulfuric acid plant. CDI’s material scientists and engineers collaborated with the pump OEM to custom design suction bell eye case rings, bowl eye case rings and bowl bushings which could sustain differential pressures of over 200 psi, coupled with an extreme temperature profile of -20°F to 105°F (-28.8°C to 40.55°C).

Testing & Instruments

   

Endurica tames road loads with new software release

Endurica LLC announces a new feature in its Endurica CL fatigue solver: automatic block cycle generation. The feature enables users to extract a simplified durability testing schedule (known as a block cycle test) from multi-channel road loads recorded at the testing track. The simplified testing schedule preserves the most essential features of the original road load history, while maintaining the original failure mode and discarding non-critical load history.  The capability enables rubber part suppliers to design fatigue tests that execute quickly and that develop realistic damage. It enables car makers to ensure durability under actual driving conditions.

The November Issue of Rubber World

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This issue focuses on Natural Rubber & Latex
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