polymerguru

Envalior, a leading manufacturer of sustainable and high-performance engineering materials, has introduced a breakthrough in halogen-free flame-retardant polybutylene terephthalate (PBT). As the first grade in a new product family, Pocan® BFN4135 delivers mechanical properties comparable with conventional PBT compounds containing halogenated flame-retardant systems. Until now, the lower mechanical performance of halogen-free flame-retardant PBT has limited its use in demanding applications requiring high strength and elongation at break. With Pocan® BFN4135, this performance gap has been closed. Potential applications include connectors, connector housings, and bobbins. “The key strength of our PFAS-free material innovation lies in its state-of-the-art flame-retardant package, which complies with the latest and upcoming requirements for sustainability, health, and workplace safety,” says Lucas Lichius, Global Product Manager for PBT at Envalior. “As a result, processors can avoid the r...

𝐓𝐨𝐝𝐚𝐲'𝐬 𝐊𝐍𝐎𝐖𝐋𝐄𝐃𝐆𝐄 𝐒𝐡𝐚𝐫𝐞 𝐁𝐢𝐨𝐦𝐚𝐬𝐬 𝐝𝐞𝐫𝐢𝐯𝐞𝐝 𝐄𝐩𝐨𝐱𝐢𝐞𝐬 Epoxy thermosets are a class of high-performance polymers known for their excellent mechanical properties, chemical resistance, adhesive strength, and thermal stability. They are formed by the irreversible crosslinking reaction between an epoxy resin (containing at least two epoxide groups) and a curing agent (hardener) Biomass-derived epoxy thermosets specifically refer to those where either the epoxy monomer, the hardener, or both, are synthesized from biomass sources. This means that the fundamental building blocks of the polymer network originate from plants, agricultural waste, or other renewable biological feedstocks. The goal is to create materials with comparable or superior performance to their petroleum-derived counterparts, but with a significantly lower environmental footprint. Bio-based epoxy monomers are typically synthesized via the epoxidation of hydroxyl or amine compounds...

  𝐓𝐨𝐝𝐚𝐲'𝐬 𝐊𝐍𝐎𝐖𝐋𝐄𝐃𝐆𝐄 𝐒𝐡𝐚𝐫𝐞 <𝟓𝟎 𝐏𝐥𝐚𝐭𝐞𝐬. 𝟎.𝟎𝟎𝟐 𝐦𝐦. 𝐀𝐧𝐝 𝐒𝐨𝐦𝐞𝐰𝐡𝐞𝐫𝐞 𝐟𝐨𝐫 𝐭𝐡𝐞 𝐀𝐢𝐫 𝐭𝐨 𝐄𝐬𝐜𝐚𝐩𝐞.> Some of our molds are built by stacking up to 50 plates and pins. The total accumulated tolerance across the stack is just 0.002 mm. Why divide a mold into so many pieces? Not only for precision. Each parting interface can also become an escape path for trapped air. In mold making, fewer parting lines are usually better. Fewer interfaces mean less potential for flash and fewer surfaces that need to be precisely matched. A one-piece structure is often the right answer. But in micro molding, deliberately dividing the mold can sometimes be what makes the molding process possible. And this is important: “𝐌𝐨𝐫𝐞 𝐩𝐚𝐫𝐭𝐢𝐧𝐠 𝐥𝐢𝐧𝐞𝐬 𝐜𝐫𝐞𝐚𝐭𝐞 𝐦𝐨𝐫𝐞 𝐟𝐥𝐚𝐬𝐡” 𝐝𝐨𝐞𝐬 𝐧𝐨𝐭 𝐦𝐞𝐚𝐧 “𝐟𝐞𝐰𝐞𝐫 𝐩𝐚𝐫𝐭𝐢𝐧𝐠 𝐥𝐢𝐧𝐞𝐬 𝐚𝐫𝐞 𝐚𝐥𝐰𝐚𝐲𝐬 𝐛𝐞𝐭𝐭𝐞𝐫.” The real issue is gap control. The goal is simple: Let the gas esc...

  𝐓𝐨𝐝𝐚𝐲'𝐬 𝐊𝐍𝐎𝐖𝐋𝐄𝐃𝐆𝐄 𝐒𝐡𝐚𝐫𝐞 𝐏𝐈𝐆𝐌𝐄𝐍𝐓 𝐃𝐈𝐒𝐏𝐄𝐑𝐒𝐈𝐎𝐍 𝐈𝐍 𝐂𝐎𝐀𝐓𝐈𝐍𝐆𝐒 | 𝐏𝐀𝐑𝐓 𝟑 — THE HIDDEN VARIABLE SPECIFIC SURFACE AREA & THE DISPERSANT–PIGMENT INTERFACE Two pigment samples can contain the same amount of pigment by weight and still require different amounts of dispersant. Because dispersants do not simply interact with grams of pigment. They interact with the pigment surface. If one pigment has a higher specific surface area, it presents more surface to the liquid phase—and potentially more surface that must be stabilized. PIGMENT LOADING ≠ SURFACE AREA Pigment loading tells us how much pigment we have. Specific surface area tells us how much surface we need to manage. Particle size is important, but surface area is influenced by: • Particle morphology • Porosity • Structure • Surface treatment • Primary particle characteristics This is why carbon blacks with different particle size, aggregate structure and surface area can have very ...

𝐓𝐨𝐝𝐚𝐲'𝐬 𝐊𝐍𝐎𝐖𝐋𝐄𝐃𝐆𝐄 𝐒𝐡𝐚𝐫𝐞 𝐎𝐧𝐞 𝐢𝐦𝐚𝐠𝐞 𝐞𝐱𝐩𝐥𝐚𝐢𝐧𝐬 𝐏𝐕𝐂 𝐝𝐞𝐠𝐫𝐚𝐝𝐚𝐭𝐢𝐨𝐧 𝐛𝐞𝐭𝐭𝐞𝐫 𝐭𝐡𝐚𝐧 𝐦𝐨𝐬𝐭 𝐭𝐞𝐱𝐭𝐛𝐨𝐨𝐤𝐬: A PVC chain standing in the middle of a triangle. At the three corners: Heat. UV. Oxygen. That is where the trouble starts. Not because PVC is a poor material. Because degradation is usually not one enemy attacking alone. Heat can accelerate dehydrochlorination. UV can initiate surface-level radical reactions. Oxygen can help turn early damage into oxidation, discoloration, embrittlement, and property loss. Alone, each factor matters. Together, they become a failure system. That is why the same PVC compound can perform very differently in: • a window profile • a cable insulation • a roofing membrane • a transparent tube • an automotive interior • an overprocessed dry blend • a product stored outdoors before use The biggest mistake? Thinking degradation starts when the product turns yellow, cracks, chalks, smells, or loses st...