PET Nucleating Release Agent Montan Sodium Salt CAS 8002‑53‑7 is refined long‑chain montanic acid sodium salt derived from lignite‑based crude montan wax. This multifunctional powder additive integrates nucleating effect and interfacial mold‑release lubricating property for PET and PBT polyester systems. During injection molding, it provides abundant heterogeneous nucleation sites to accelerate polyester crystal formation. Faster crystallization shortens the cooling duration inside mold cavities

Product Detail

Product Detail Page: Montan Sodium Salt is manufactured via lignite montan wax multi‑stage purification, saponification and sodium salt precipitation reaction, followed by filtration, drying and fine‑grinding into free‑flowing fine powder. Each production batch is strictly tested for dropping point, metallic‑salt content, thermal weight‑loss, nucleating efficiency and demolding performance to guarantee stable processing behaviour for PET and PBT compounding and injection molding.

Semi‑crystalline PET and PBT suffer from relatively slow inherent crystallization rates. In standard injection‑molding production, long mold cooling time is mandatory to ensure sufficient rigidity before part ejection. Long cooling cycles severely limit daily production output. Especially for glass‑fiber‑reinforced PET and PBT grades, molten polyester composite material tends to adhere firmly to mold cavity surfaces after cooling. Direct ejection often triggers whitening, cracking, deformation and surface scratches on finished molded workpieces. Separate formulation of ordinary nucleating powder plus conventional external lubricating wax requires delicate formula balancing; common low‑molecular‑weight lubricants tend to volatilize at high polyester processing temperature, creating smoke, mold deposits and surface blooming defects on finished polyester parts.

When evenly premixed with polyester resin, glass‑fiber reinforcement and heat stabilizers at the recommended loading range, fine montan sodium‑salt powder disperses homogeneously throughout the PET or PBT matrix. Under cooling conditions inside the mold, the additive provides massive heterogeneous nucleation sites, greatly accelerating crystal growth of the polyester molecular chains. Accelerated crystallization allows molded components to gain enough structural rigidity within a shorter cooling period, realizing up to 35% reduction of overall injection molding cycle and significantly improving molding machine throughput. Simultaneously, partial additive migrates towards the contact boundary between hot polyester melt and metallic mold surface, constructing a continuous low‑friction interfacial film. This slippery boundary layer decreases resin‑mold adhesion, facilitates smooth ejection of intricate thin‑wall and glass‑fiber‑reinforced PET and PBT molded articles. Thanks to its long‑chain montan‑sodium‑salt molecular structure, it maintains excellent thermal stability under high polyester processing temperatures with low volatility and minimized surface‑blooming tendency during long‑run continuous molding.

Precise dosage control is essential for polyester formulation work. Under‑dosage leads to insufficient nucleating efficiency and weak mold‑release capacity; cycle‑shortening effect is limited, and mold‑sticking defects persist. Excessive addition accelerates crystallization excessively, introducing higher internal residual stress inside molded polyester components, and may generate progressive mold deposits during prolonged mass production. Laboratory compounding and injection‑molding trials are strongly recommended prior to formal large‑scale manufacturing. This montan sodium salt can be compounded together with polyester heat stabilizers, antioxidants, mineral fillers and glass‑fiber reinforcements.

For compounding operations, powdered montan sodium‑salt nucleating‑release additive is premixed with PET / PBT base resin, stabilizers and reinforcing fillers inside a high‑speed mixer, before twin‑screw extrusion pelletizing or direct injection molding.

Protect the fine powder product against moisture absorption and foreign particulate contamination. Humid storage conditions may result in slight powder caking.

Major application fields: cycle‑time‑shortening nucleating‑release additive for unfilled PET and PBT injection‑molded components; multifunctional processing auxiliary for glass‑fiber‑reinforced PET‑PBT engineering‑plastic compounding; high‑temperature‑stable nucleator for crystalline polyester molded goods.

Store the product in tightly‑sealed original bags within 15‑30℃, keep dry and avoid direct sunlight.

Previous : Polyamide Nucleating Release Agent Montan Calcium Salt CAS 8002-53-7, PA Injection Molding Cycle Reduction Next : Oxidized Polyethylene Wax (OPE) CAS 68441-17-8, Polyolefin Release for PE PP PS ABS Polyester Extrusion

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PET Nucleating Release Agent Montan Sodium Salt CAS 8002-53-7, PET PBT Injection Molding 35% Cycle Reduction

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.