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.
The challenge in making PE flame-retardant lies not in a low oxygen index, but in the severe dripping and extreme difficulty in charring caused by its linear alkane structure. This article provides an in-depth analysis of the formulation logic—“first suppress dripping, then promote charring, and finally adjust the loading”—and, by comparing the order-of-magnitude differences between bromine-antimony, halogen-free, and microencapsulated red phosphorus formulations, helps you avoid the pitfall of production line torque surges caused by high filler loading.