Passed The Flame-retardant Test But Failed in Production? YinSu Flame Retardant Company’s PE Bromine-antimony Masterbatch Solves The “passes Testing But Fails in Production” Dilemma.

When it comes to flame-retardant PE pipes, the biggest concern isn’t failing the test—it’s passing the test but failing on the production line.

Engineers who work with PE corrugated pipes, electrical conduits, and hollow sheets all know this—once the flame-retardant masterbatch is added and the tests are passed, problems start to arise on the production line: white bloom on the surface, brittle pipes, extruder screen clogs, and yellowing. After repeatedly adjusting the formulation and switching raw materials, the flame-retardant rating actually becomes even less stable.

The PE-XT-141 bromine-antimony masterbatch, developed by Yinsu Flame Retardant Company, is a reactive and additive-based flame-retardant masterbatch that directly addresses the issue of products passing tests but failing on the production line.

Key Product Selling Points:

No leaching, no failure. Traditional flame retardants have poor compatibility with PE; after being left for a period of time, they cause surface frosting and whitening, leading to a decline in both the appearance and performance of the pipe. PE-XT-141 forms a uniform and stable dispersion system through melt blending and does not leach even after long-term storage.

Self-extinguishing upon removal from the flame, with controllable addition levels. Adding just 10–20% to PE achieves self-extinguishing properties upon removal from the flame. For V0-rated corrugated pipes, the typical addition rate is around 16%, though this should be adjusted based on the raw material’s melt flow index.

White masterbatch, compatible with any color. The white pellets are suitable for white flame-retardant products made from HDPE/LDPE and do not interfere with color matching. For transparent flame-retardant materials, a specialized transparent flame retardant must be used.

Wide range of process compatibility. Suitable for injection molding, filament drawing, extrusion, and blow molding. Applicable to corrugated pipes, electrical conduits, hollow panels, artificial turf, fire-resistant mesh, wires, and cables.

Frequently Asked Questions from Engineers:

FAQ: How much should be added to achieve V0 rating?

Generally, around 16% is sufficient to achieve V0 rating, but since different PE grades have different melt flow indices, the required amount may vary. We recommend conducting small-scale tests with the actual raw material to confirm.

FAQ: Will adding flame-retardant masterbatch affect the color?

Generally, no. PE-XT-141 is a white masterbatch, and conventional flame-retardant systems do not cause discoloration during processing. For transparent products, a specialized transparent flame retardant must be used.

FAQ: Why does adding a flame retardant sometimes result in poorer performance?

A common cause is the addition of fillers such as calcium carbonate or talc, which can severely interfere with the flame-retardant effect. Additionally, when the optimal addition ratio is exceeded, the higher the addition level, the poorer the flame-retardant performance becomes.

FAQ: How can I prevent blooming and precipitation on the surface of flame-retardant pipes?

The main cause is poor compatibility between traditional flame retardants and PE. PE-XT-141 forms a uniform and stable dispersion system through melt blending and does not precipitate even after long-term storage. At the same time, avoid adding interfering fillers such as calcium carbonate.

Applicable Products: Corrugated pipes, electrical conduits, hollow panels, artificial turf, fire-resistant mesh, wires and cables, etc.