Specialty Silicone Products (SSP) announced that SSP-2569-65, an EMI silicone filled with silver-copper particles, is now part of the Qualified Product List (QPL) for MIL-DTL-83528, Type A. In a July 22 letter, the Defense Logistics Agency (DLA) informed SSP that SSP-2569-65, a 65 durometer conductive elastomer for shielding and sealing, passed qualification testing and has been added to QPL MIL-DTL-83528 for specific drawings and material types.Read more
The use of soybean oil as a plasticizing agent in rubber compounds versus traditional petroleum based oils is examined.Read more
Tire lightweighting is examined, including how density of an elastomer is related to its chemical constitution, and which
monomers should be used for designing an elastomer of lower density.
Structure of the light truck radial
tire according to characteristics of aging and endurance of the tire is examined, corresponding measures are taken to improve aging endurance, and obvious improvement results are explained.
Plasticizers are one of the key components of the rubber and adhesives industries. Plasticizers are used to lower hardness, improve processability and reduce raw material costs. On the other hand, mechanical properties deteriorate with plasticizer content. In addition, plasticizers often cause changes in properties with time and staining due to volatilization or bleeding. Phthalate plasticizers and aromatic oils are or possibly will be regulated due to environmental and human health issues. Kuraray liquid rubbers (KLR) are plasticizers which are co-vulcanizable with solid rubbers. Therefore, it is very unlikely that KLR will be subject to these bleeding or volatilization issues. As a result, KLR is expected to have a growth potential as an environmentally friendly plasticizer.Read more
Part 1 of this contribution, published in the May 2021 edition of Rubber World, investigated a real manufacturer’s process that was set to produce medical tubing. It was found (through trials at the extruder, then through simulations) that the equipment available to the manufacturer was too large for the relatively low output that was required for this project, and consequently the polymer was degrading on the screw surface. It was ultimately determined through simulation that a smaller extruder, with a screw optimized for the low rate, would work better.Read more
Mold design processes today benefit from sophisticated
design software that creates 3D models easily exported to
manufacturing, CAM programming and metal cutting
Performance material usage is increasing in the manufacture of tires. These materials are composed of various additives with different properties that require a high level of expertise to maintain their properties throughout the production process and to deliver the desired, consistently high level of required quality. This is just one aspect that increases complexity in the manufacturing process. Market demands for more cost-effective products are also constantly increasing. Operating costs eserve special attention because process optimization is paramount on every manufacturer՚s agenda. Specialty chemicals group Evonik Industries and plant automation supplier Zeppelin Systems are working closely together to show how the use of innovative products and processes can both improve the performance properties of tires, while making their manufacture even more economical.Read more