From September 21 to 24, 2026, THE 12TH ALL CHINA - INTERNATIONAL WIRE & CABLE INDUSTRY TRADE FAIR (Wire China 2026) will be held at the Shanghai New International Expo Center in China. YinSu Flame Retardant will be showcasing its five core product lines at Booth E7G35 in Hall E7，Whether you’re interested in power cables, control cables, communication cables, or specialty wires, we have products of various grades and applications to discuss. We welcome both new and existing customers to scan the QR code to register and visit our booth for a face-to-face discussion.

From September 15 to 17, 2026, at the Shanghai New International Expo Center, The 29th Adhesives and Sealants Expo (ASE CHINA 2026) is set to kick off. Also taking place at the same venue and during the same period are the 24th China International Rubber Technology Exhibition and the 23rd China International Chemical Industry Exhibition. Together, these three exhibitions will form “China Petrochemical Industry Week,” which is expected to attract more than 100,000 professional visitors from both China and abroad.

How Can PET Blended Spinning Modification Balance Flame Retardancy and Spinnability? YinSu Flame Retardancy: An analysis of the technical background of blended spinning, the logic behind selecting flame-retardant masterbatches, the phosphorus-silicon synergistic system, as well as the root causes and solutions for fiber breakage, nozzle clogging, and reduced melt stability—providing a systematic reference for the functional modification of PET fibers, from formulation to process.

PET Flame-Retardant Filament Spinning: Filament Breakage, Nozzle Clogging, and Decreased Tensile Strength? This article analyzes the core elements of flame-retardant masterbatch formulation design—Yiinsu flame retardant, selection of halogen-free and phosphorus-based flame retardants, synergist matching, and dispersion and antioxidant systems—and provides a formulation framework that balances spinnability and flame retardancy in PET spinning.

Flame-retardant PP is rapidly replacing traditional flame-retardant HIPS and ABS in the home appliance and electronics sectors thanks to its lightweight properties (20% weight reduction) and cost advantages (37% cost reduction). Compared to HIPS/ABS, which suffer from relatively high prices and mediocre resistance to yellowing and aging, flame-retardant PP has emerged as the preferred alternative due to its low cost, lightweight properties, and excellent resistance to aging. Yinsu Flame Retardants offers bromine-antimony and phosphorus-nitrogen-based flame retardant solutions to meet various environmental and cost requirements.

This week, bromine prices rose to 40,000 yuan per metric ton. Cost-side support for bromine-based flame retardants has strengthened, and low industry inventories combined with suppliers’ reluctance to sell have solidified the price floor. Pre-holiday stockpiling has driven essential restocking, but downstream buyers are reluctant to purchase at high prices, limiting the scale of concentrated restocking. Overall, the bromine-based flame retardant market is expected to consolidate at high levels next week in line with bromine prices. Prices are likely to remain stable rather than fall, though upside potential will be constrained by downstream acceptance.

Weekly melamine production fell by 3.57%, with capacity utilization dropping below 50%. Mainstream offers range from 5,700 to 5,900 yuan per metric ton, providing cost support for nitrogen-based flame retardants such as MCA and MPP. Downstream demand remains weak, and the cost pass-through for flame retardants is not proceeding smoothly, putting pressure on profits. Some production facilities are set to resume operations next week; keep an eye on new guidance from industry conferences.

A single-strand combustion test can only demonstrate that the cable material itself is self-extinguishing, whereas bundle combustion testing is the “ultimate test” for evaluating a cable bundle’s ability to resist flame spread in a real fire. The challenges of bundle combustion testing lie in the chimney effect causing heat accumulation, molten droplets igniting materials below, and auxiliary materials such as filler ropes acting as flame pathways. The silver-plastic flame-retardant K100 nano-organic montmorillonite char-forming synergist, through intercalation modification technology, forms a dense, barrier-like char layer during combustion that traps molten material to prevent dripping. When used in conjunction with primary flame retardants such as ATH and MDH, it helps ensure consistent success in bundle burning tests.

Flame retardancy in adhesives is often compromised by white spots caused by uneven dispersion of flame retardants, or by an acidic pH that affects bond strength. The silver-plastic flame retardant WADP-10 has been specially modified to offer excellent dispersion and a near-neutral pH; it does not interfere with curing, does not corrode substrates, and provides stable peel strength. MCA-B is suitable for nylon and oil-based adhesive systems, meeting the dual requirements of V-0 flame retardancy and bonding performance.

Antimony prices remain stuck at high levels, with antimony trioxide holding steady at 95,000–98,000 yuan per metric ton, while bromine has risen in tandem to 37,000–37,500 yuan per metric ton, keeping cost pressures on flame retardants high. Zimbabwe’s export ban has exacerbated supply disruptions, and with downstream demand remaining weak, the market is caught between rising and falling prices. This has further opened the window for evaluating antimony-free alternatives.

FPC, FFC, and electronic potting compounds—uneven flame retardancy in ultra-thin coatings, component contamination, and failure due to high temperatures during reflow soldering are the three major challenges in flame retardancy for electronic adhesives. Yinsu’s YS-F22B ultra-fine halogen-free flame retardant (comparable to Clariant OP930), with a D95 particle size of ≤10 μm, is hydrolysis-resistant, non-migrating, and does not contaminate components. It achieves UL94 V-0 compliance at low loading levels and is suitable for high-end electronic adhesive applications such as FPCs, FFCs, electronic potting compounds, and label adhesives.

Flame Retardancy Achieved, but Performance Compromised—The Number One Challenge in Epoxy FormulationsPassed the Flame Retardancy Test, but Performance Crashed—The Number One Challenge in Epoxy FormulationAnyone who formulates epoxy knows that the biggest fear in flame-retardant modification isn’t th

In August, the average monthly price of yellow phosphorus rose 4% month-over-month and 22% year-over-year, keeping costs for phosphorus-based flame retardants under sustained pressure. However, due to weak downstream demand, industry-wide oversupply, and difficulties in passing on cost increases, price hikes for flame retardants were limited, squeezing profit margins. In September, stockpiling ahead of the two major holidays may drive yellow phosphorus prices higher still, and cost support remains strong. Until end-user demand shows a noticeable recovery, the phosphorus-based flame retardant market is expected to maintain a pattern of “high costs, weak demand, and tight profit margins,” with profit recovery still contingent on a revival in consumption.

The leaching of flame retardants from corrugated pipes causes surface whitening, frosting, and a decline in performance; the root cause lies in the poor compatibility between the flame retardants and the PE substrate. YinSu Flame Retardant Company offers PE-XT-141 non-leaching flame-retardant masterbatch and the FRP-950X red phosphorus flame-retardant solution, which address the leaching issue at its source and ensure long-term stability of flame-retardant performance.

GB 8624-2023 has included building piping materials within the scope of Class B1 flame retardancy. Rigid PVC pipes coated with 8 parts of red phosphorus can meet Class B1 requirements, while their ring stiffness and drop-weight impact resistance comply with GB/T 10002.1. Flame retardancy requirements for piping materials used in high-rise buildings, subways, and data centers are shifting from “optional” to “mandatory.”

The PE-XT-141 bromine-antimony masterbatch, developed by Yinsu Flame Retardant Company, is a reactive and additive flame-retardant masterbatch that directly addresses the issue of “passing tests but failing on the production line.” This article introduces the product’s key selling points and answers several questions frequently asked by engineers.

Bromine fell by 1,750 yuan per metric ton during the week to 37,750 yuan per metric ton, a decline of 4.6 percent. Downstream buyers were strongly pushing for lower prices, causing transaction prices to trend downward. While cost support for bromine-based flame retardants has weakened, the impact has been slow to materialize. Combined with the traditional off-season for demand, the flame retardant market is under short-term pressure and is trading on a weak note.

High-density polyurethane foam faces the “impossible triangle” of damping, flame retardancy, and strength. Yinsu Flame Retardant employs a dual-technology approach—“intrinsic flame retardancy (molecular incorporation of phosphorus-containing monomers) + surface armor (polysiloxane flame-retardant layer)”—to simultaneously enhance all three performance metrics, thereby avoiding the mechanical property degradation associated with traditional additive-based flame retardants. The LEFP series of microcellular foam materials is already in mass production and is being used in applications such as automotive shims and railroad sleeper pads.

Sulfur prices have surged 187% year-over-year, with solid sulfur in East China rising from 2,394 yuan per metric ton in 2025 to 6,871 yuan per metric ton in 2026. This week, the mainstream granular sulfur price at Chinese ports stood at 8,750 yuan per metric ton, down 300 yuan per metric ton from last week—a 3.31% decline. Nationwide port inventories stand at 878,400 metric tons. Although this represents a 5.25% increase from the previous week, it remains more than 63% lower year-over-year and is at a near-decade low. The global supply shortfall is approximately 5.13 million metric tons, with imports far below normal levels. Prices for phosphorus-based flame retardants, such as red phosphorus and ammonium polyphosphate, are prone to rise but not fall due to cost pass-through from sulfur. Coupled with successive price increases for bromine and antimony, the overall cost pressure on the flame retardant industry continues to climb.

A Comprehensive Analysis of PVC Flame Retardant Types, Synergistic Mechanisms, and the UL 94 Flame Retardancy Rating Standard. Due to the presence of plasticizers, the LOI of flexible PVC decreases significantly; therefore, highly effective flame retardancy must be achieved through synergistic blending of chlorinated paraffin, red phosphorus, antimony trioxide, and other compounds. This article provides a detailed explanation of the mechanisms of action for halogen-based, phosphorus-based, nitrogen-based, and inorganic flame retardants, covering classic case studies in applications such as PVC cable compounds, pipes, and profiles, and serves as a technical reference for formulation engineers engaged in PVC flame retardant modification.