Selecting rubber materials isn’t just about mechanical performance — it directly affects the safety, reliability, and service life of your products. Electrical properties determine whether a material can insulate or conduct effectively; thermal properties govern how well the material handles temperature changes and manages heat; permeability defines its ability to block gases or liquids. By […]
Rubber products may sometimes turn white on the surface after being stored for a period of time, which is commonly known as frosting. Why is that? I. Blooming Phenomenon Definition Item Description Essence Migration and precipitation of liquid/solid compounding ingredients from rubber interior to surface Appearance Whitening on rubber product surface, often accompanied by aging
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Why rubber blooming or blushing and solutions? Major Causes of Blooming 1. Excessive Additives or Insufficient Solubility Excessive Sulfur/Accelerators: Sulfur has limited solubility in rubber (e.g., ~1.5% in natural rubber, NR). Excess unreacted sulfur migrates to the surface and forms crystals. Precipitation of Antioxidants/Plasticizers: Certain antioxidants (e.g., 4010NA) or low-molecular-weight plasticizers (e.g., DOP) tend
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Understanding Polar vs. Non-Polar Rubber Material Understanding polar and non-polar rubber material could support us to choose the right rubber material during design phrase. 1. Definition and Core Differences The fundamental distinction between polar and non-polar rubbers lies in the presence and density of polar groups within their molecular chains. Polar groups (e.g., -CN, -Cl, -F, -COO-) alter
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