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Today's KNOWLEDGE Share Injection Molding creates non-monotonic crystallinity gradients through the thickness, and corresponding non monotonic elastic modulus. On one hand the rapid quench of the skin (combined with fountain flow) reduces crystallinity of the most outer layers leading to typically half the nominal modulus ( PP data). The high shear just below (frozen skin) will produce strong "flow induced nucleation" and more crystallinity ( and oriented structures). These layers can be 4X stiffer than the skin in PP. Finally the core section undergoes a more quiescent crystallization with slower cooling and shear rates and will have "average" crystallinity, larger non-oriented crystals and pretty much the data-sheet kind of modulus . source:Vito leo

 CJ Biomaterials, Inc, continues to expand the applications for its advanced PHA technology, announcing that their biopolymers are being used by California-based Beyond Plastic to develop the world’s first completely biodegradable plastic bottle cap. CJ Biomaterials is a division of South Korea-based  CJ CheilJedang  and a primary producer of  polyhydroxyalkanoates (PHA)  biopolymers. Both Recyclable and Compostable: “ We are proud to be working with Beyond Plastic to help make this innovative solution a reality. These PHA-based bottle caps not only address the pressing environmental concerns associated with traditional plastic caps, but also demonstrate the versatility and effectiveness of our PHA technology in delivering sustainable alternatives, ” says Max Senechal, chief commercial officer at CJ Biomaterials. “ We remain committed to advancing eco-friendly solutions that contribute to a healthier, more sustainable planet. ” Derived from nature and produced sustainably, CJ Biomateri

Milliken & Company will bring its full range of additive and colorant solutions for polypropylene (PP) and polyethylene (PE) plastics to NPE 2024. Milliken joins industry leaders for the expo to explore novel and sustainable pathways for plastics, enabled in part by the company’s comprehensive polymer additive portfolio. Opportunity to Collaborate with Plastics Value Chain: Milliken works across the value chain to enable PP and PE formulations that make plastics more reusable, recyclable, and efficient without sacrificing performance. With a range of clarifier and nucleator agents, masterbatches, polymeric colorants, and viscosity and performance modifiers, Milliken’s portfolio helps its customers and brand owners achieve their own sustainability goals. “We look forward to NPE, as it’s an exciting opportunity to collaborate with the entire plastics value chain under one roof,” shares Milliken’s global vice president for Plastic Additives Wim Van de Velde. “Milliken offers a suite o

  Want to know more about business opportunities in Polymer Composites Cylinder manufacturing?? Want to understand how to set up a Type4 H2 Cylinder manufacturing plant?? Join me on  April 24th, 10AM-12.30PM IST at IIT Gandhinagar, Gujarat.   I will be hosting a workshop on Type 4 Hydrogen Cylinder manufacturing and sharing my experiences, and also address  challenges in the liner and overwrapping cylinders manufacturing process, material selection, future of the hydrogen economy, etc.  Don't forget to be there, you can register here  https://lnkd.in/d2dbcra3 Look forward to seeing you at this workshop, let's connect, and build a clean energy future together! #polymers   #polymerscience   # composites   #plasticsindustry   # hydrogen   #compositematerials   # manufacturing   #hydrogeneconomy #storagetank  # india   #cgd   # pipeline   #natural gas   #gas #greenhydrogen #electrolysers #ccus #alternativeenergy   #renewableenergy   # environmental #cleanenergy #netzero #c

Today's KNOWLEDGE Share Hengshen’s carbon fibre materials are used in a 143-meter-long wind turbine blade.The blade is 143 meters long and has an impeller diameter of 292 meters. It is one of the wind turbine blades with the largest impeller diameter in the world.  The carbon fibre fabric used in this blade is exclusively supplied by China’s Hengshen which has annual production capacity of 5,000 tons of carbon fibre. The product portfolio covers raw silk, carbon fibre, sizing agents, fabrics, liquid resins, adhesives, prepregs, carbon fibre composite parts, and aviation composite structural parts.  In 2021, Hengshen’s 24K carbon fibre, fabric and carbon plate products obtained DNV certification from the international authoritative certification agency, becoming the first domestic carbon fibre unit to obtain this certification. Up to now, Hengshen has supplied products such as carbon fibre pultruded sheets and warp-knitted fabrics in batches to domestic and foreign wind turbine man

Today's KNOWLEDGE Share Do you realize how deformable your mold can be ? Years ago I measured the mold plate deflection under a packing pressure of 80 MPa (that is 800 bar or less than 12000 psi) , for a simple two plate, robust, stainless steel plate mold. We found that the bending accounted for 20 microns equivalent increase in cavity thickness. Over the original 2mm cavity thickness, this is a whole 1 %, more than the typical shrinkage of a nicely packed PC. But the amazing finding, based on FEA computations of the mold metal structure itself, is that about 1/3 of this increase was due to steel compressibility ! So, even in the remote (actually impossible) case your mold would be very very stiff, the cavity would still grow bigger during pack because of STEEL COMPRESSIBILITY ! source:Vito leo

Today's KNOWLEDGE Share Researchers from the University of Warwick and the University of Cambridge have developed sensors made from frozen smoke. They claim the sensors can detect extremely low concentrations of formaldehyde. Significantly, the results may contribute to a new era of air quality monitoring.  Formaldehyde — what is it? Formaldehyde is a commonly found air pollutant in indoor environments. Household items like wallpapers, pressed wood products, paints, and  tobacco smoke  emit it. High concentrations of formaldehyde exposure can lead to respiratory irritation, headaches, respiratory symptoms, and an increased risk of certain cancers. Current indoor   air quality   sensors lack the sensitivity to detect formaldehyde at such low levels. This is what the researchers focused on.  The team used 3D printing techniques to develop sensors made from aerogels, also known as  frozen smoke . These sensors can detect  extremely  low levels of formaldehyde in indoor air, which the