The surface energy of flame-retardant ABS is typically 4–6 mN/m lower than that of standard ABS; this is often the cause of paint peeling in the cross-hatch test and pinholes in spray coating, and has little to do with the paint brand. This article presents three practical approaches—dynamic surface energy criteria, pretreatment, and annealing—as well as a low-cost alternative involving the “separation of appearance parts from flame-retardant parts.”
This week, bromine prices in China adjusted at high levels, with the mainstream price in Shandong at 44,000 yuan/metric ton (up 1,250 yuan/metric ton week-on-week). The operating rate remained steady at 49.67 percent; supply remained tight, and holders were reluctant to sell, supporting prices. Downstream flame retardant buyers struggled to absorb the high prices, resulting in sporadic small-volume transactions and restocking driven primarily by immediate needs. Overall, the market remains deadlocked at high levels due to “supply propping up prices and weak demand.” Next week, prices are expected to fluctuate within a narrow range of 44,000–45,000 yuan per metric ton. In the short term, bromine-based flame retardants face cost pressures, and cost pass-through is hindered; downstream buyers should purchase only as needed and avoid stockpiling at high prices.
Halogen-free PE cable compounds must reach 60% to meet the V-0 rating, but this comes at a cost to the production line: bridging in the feed hopper, skyrocketing torque, frequent strand breaks, and powder buildup in the die head. From a shop-floor process perspective, this article breaks down the machine setup sequence and best practices—from feeding and extrusion to winding—step by step, helping you maintain your formulation grade while ensuring smooth extruder operation.