Selecting and validating PHPS and organic polysilazane coatings for liquid cooling Define the cooling method and coating location before choosing a material. With cold-plate cooling, coatings on boards and devices normally remain separate from coolant. Single- and two-phase immersion expose coatings to the fluid for extended periods and require different validation. PHPS can convert towards a

Diagnosing and treating dust pickup after cleaning silicone rubber If silicone rubber quickly collects dust after washing, do not keep increasing the cleaner concentration. First look at how the dust adheres. Loose dust that blows off but returns during standing points more towards static or environmental deposition. Dust that sticks and leaves smears calls for checks for cleaner films, oil,

Temperature resistance alone is not enough to select a fuel-system seal. With prolonged exposure to fuel, mineral oil, hydrocarbons or a specific solvent, the material also needs to retain its dimensions, elasticity and sealing performance. If fluid resistance is limiting service life, include FVMQ fluorosilicone in the shortlist. For heat, cold, weathering and electrical insulation without s

Why raw-material compliance alone is insufficient, and how to review volatiles, migration and the finished formulation. A compliant base polymer and a supplier document do not establish compliance of the finished article. GB 4806.16-2025 covers food-contact silicone rubber materials and articles, including raw-material requirements, sensory properties, physicochemical criteria and migration t

How do FDA 21 CFR 177.2600 and GB 4806.16-2025 apply, and what needs checking when choosing fumed or precipitated silica? A supplier's “FDA compliant” or “food grade” label is not enough to select silicone rubber for food contact. Start with the finished article, intended contact conditions and destination market, then review the complete formulation, processing, post-treatment, migration or

High thermal conductivity does not mean low actual battery-pack thermal resistance. Traction batteries, energy storage systems and high-power electronic assemblies require more than simply the highest possible thermal conductivity. Materials must also meet requirements for interfacial conformity, thickness control, pumping or dispensing, flame retardancy, low volatility, aging resistance,

High thermal conductivity does not necessarily mean low thermal resistance. Recent industry reports continue to identify traction batteries, energy storage systems and high-density data centers as important demand areas for thermal interface materials. For businesses, customers usually care about more than the single thermal conductivity value in promotional literature: can the material m

When fumed silica prices rise or lead times grow, can silicone rubber producers switch to another fumed grade or precipitated silica? A switch is possible to evaluate, but neither price nor a matching BET area justifies an immediate substitution, and precipitated silica should not be added at the same phr. First establish the affected grade, plant, packaging, delivery region and firm lea

How should food-contact silicone rubber be selected and verified for compliance? Do not select it solely from a “food-grade gum,” “FDA silica,” or a supplier statement for one ingredient. First define the sales market, food, contact temperature and duration, and reuse pattern. Then review the polymer, silica, crosslinker, catalyst, pigment and processing aids. Test the finished article m

If the spray solution spreads rapidly but tends to run off (sag) after adding IOTA 2000, what should be adjusted first? When IOTA 2000 is added to a tank mix, if the solution spreads quickly across the leaf surface but drips off the tips or edges, the issue should not simply be attributed to an excess of spreader. One should also examine the actual adjuvant concentration, spray volume pe