Improved quality compounds using optimized grades of compounded butyl rubber, conductive carbon blacks and resin vulcanization systems have contributed to incremental improvements in tire curing bladder performance, allowing optimization of bladder gauge and dimensions to facilitate rapid heat flow into the curing tire.
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Friction induced noise in automotive door seals is mitigated with highly durable water-based coatings having a low coefficient of friction.
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A design of experiments (DOE) on two EPDM rubber extrusion compounds identifies to what degree properties are influenced by mixing drop temperature, milling time and mill temperature.
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A measurement technique makes it possible to scan surfaces of several cm2 to show the distribution of different chemical elements.
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Patent News as compiled by the editors of Rubber World for May 2024. Rubber composition and a tireU.S. patent: 11,802,195
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The objective here is to provide a list of common latex types, their key characteristics, and a summary of their useful properties and contributions. It is unlikely that the summary will capture all the salient points of each latex type; but it should provide enough information to be useful if called upon to deliver a “30 second commercial.”
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Principal methods for processing elastomeric materials are reviewed, including continuous extrusion and what is described as multi-step extrusion.
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Blends of hard clay, N990 and N550 were utilized to evaluate the electrical percolation region of EPDM compounds; and the viscosity and physical properties of the compounds were also measured.
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Development of a market for devulcanized and revulcanized rubbers can be achieved with in-depth understanding of the precise correlation among the physical and chemical properties of the initial vulcanizate, the devulcanization technique, and properties of the resulting devulcanizates.
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