DEMGY will be present at JEC World 2026 - March 10–12, 2026, Paris‑Nord Villepinte

Once again this year, DEMGY Group, world leader in aircraft interiors, invites you to join us at , the must-attend global event for composite materials. Come and discover how our lightweight, high-performance solutions are reinventing aircraft interiors.

Recognized as a major international player in the aerospace industry, DEMGY designs and manufactures thermoplastic and thermoset composite parts specifically for aircraft interiors.

Our solutions, which are lighter than metal, enable:

lighter structures,

improved overall performance,

and a reduction in the carbon footprint of aircraft.

At JEC World 2026, our teams will present our most distinctive processes:

 – our exclusive technology for complex yet ultra-lightweight thermoplastic composite parts

Flaxcomp® – our expertise in the processing of high-performance biocomposites, combining mechanical performance, lightness, and an eco-responsible approach.

Additive manufacturing in high-performance composites – carbon PEKK, PEKK 100, PPS, continuous fiber composites, etc.

Processing of ultra-high-performance polymers – Extreme performance materials processed for critical applications.

source Demgy

Today's KNOWLEDGE Share : How Do Plasticizers Work in Plastics?

Today's KNOWLEDGE Share

How Do Plasticizers Work in Plastics?

Plasticizers are additives introduced into polymers to improve flexibility, elongation, and overall processability.

They are particularly important in resins such as PVC, but they are also used in polyolefins and other thermoplastics when modifications to mechanical behavior are required.

What Do Plasticizers Actually Do?

Plasticizers function at the molecular level by reducing the intermolecular forces between polymer chains. This lowers both the glass transition temperature (Tg) and the viscosity of the molten plastic.

As a result, the mobility of the macromolecules increases, making the material easier to process and more flexible after cooling. In addition, plasticizers improve processing efficiency by reducing the pressure and torque required during manufacturing, which can also lead to lower energy consumption.

Types of Plasticizers:

Phthalates

Terephthalates

Trimellitates

Adipates and Sebacates

Organophosphates​

Citrates

Bio-based Plasticizers

Are All Plasticizers Toxic?

Not all plasticizers are inherently toxic. The safety profile of plasticizers varies significantly depending on their chemical structure and formulation. While certain legacy phthalates have been associated with health and environmental concerns, many modern plasticizers—such as DEHT (dioctyl terephthalate) and citrate-based plasticizers—demonstrate excellent toxicological profiles and are approved for use in food-contact materials and medical applications.

Why Do Plasticizers Migrate Out of Plastics?

Plasticizers are typically physically blended with polymers rather than chemically bonded to the polymer chains. Because of this, they retain a degree of molecular mobility within the polymer matrix.

Over time particularly under conditions involving elevated temperatures, mechanical stress, or contact with oils and solvents smaller plasticizer molecules can gradually diffuse through the polymer structure. This process may lead to surface migration or volatilization, commonly referred to as plasticizer migration.

Michelin ResiCare launches two new alternatives to phenolic resins

Michelin ResiCare, a brand of the #MichelinGroup, announces the commercial launch of #Resi4 carbon/carbon and Resi4 ablation, two innovative #araminolicresins that are formaldehyde-free and bio-based—100% and 90% respectively. Primarily formulated from 5-HMF (#5hydroxymethylfurfural), a bio-sourced and non-toxic molecule, these new solutions provide a safer alternative to traditional phenolic resins.

Available and compatible with industrial-scale production starting in September 2026, these #thermosetting resins are designed for the most demanding #composite applications, including aerospace, defence, aeronautics and automotive industries.

Thermal performance and regulatory compliance

These new resins meet the growing demand from composite manufacturers seeking high thermal performance, strict compliance with European regulations (including REACH and Directive 2004/37/EC) and a reduction in their environmental footprint.

They are also part of a fully European sourcing approach, from raw materials to the finished polymer, helping to secure the supply chains of strategic industrial sectors.

Innovative araminolic chemistry

Developed from innovative araminolic chemistry, these resins replace formaldehyde with aromatic aldehydes and bio-based polyphenols, while maintaining the required levels of thermal performance for advanced composites.

This approach enables manufacturers to anticipate regulatory changes while ensuring the robustness and reliability of materials exposed to harsh environments.

Resi4 carbon/carbon: designed for high-temperature composites:

Resi4 carbon/carbon is aimed at CMC (#CeramicMatrixComposites), where it delivers high thermal performance without formaldehyde. It stands out as an ideal solution for high-performance applications such as space propulsion, nuclear energy, advanced civil engineering and motorsports, where thermal stability and material reliability are critical.

Resi4 ablation: optimised for extreme environments:

Also formulated without formaldehyde, Resi4 ablation is distinguished by its particularly high charring rate, meeting the strictest specifications for ablation and thermal resistance. It targets applications exposed to extreme thermal flux, where the stability of the char layer determines the performance and safety of systems, especially in the space and defence sectors.

With these two new resins, Michelin ResiCare offers composite industry players solutions that are immediately available for testing and industrially operational by September 2026, simultaneously meeting requirements for thermal performance, environmental durability, regulatory compliance and operator safety, without compromising market demands.

photo : Michelin ResiCare

source : JECCOMPOSITES

Arkema showcases innovative materials at Interbattery 2026

Arkema has established itself as the reference supplier for materials enabling the rapid expansion of LFP cathode technology. Since 2007, #Kynar®HSV 900 has become the industry’s reference PVDF binder, powering more than 10 million #EVs worldwide and countless Energy Storage Systems thanks to its proven reliability, processing robustness, and outstanding cycling performance.

Building on this legacy, Arkema continues to expand its LFP technology platform with newly developed #PVDF grades Kynar® HSV 1200 and HSV 1400 engineered to deliver improved adhesion, lower binder loading, and higher active-material content for increased energy density. Complementing these PVDF innovations, recently introduced the Incellion™ family, which further strengthens Arkema’s leadership with solutions such as Incellion™ Pr 2510 for primer coatings and Incellion™ El 3020 for water-based Silicon anodes, enhancing adhesion, conductivity, durability, and processability for next-generation LFP cells.

Next-generation solutions: solid-state batteries and advanced dry-process technologies

Arkema is also accelerating material innovation for the next wave of battery technologies, including all-solid-state and semi-solid batteries as well as advanced dry-electrode processes. For semi-solid and solid-state architectures, Arkema is developing new generations of binder materials tailored for solid electrolytes, interface stabilization, and high-voltage cathode compatibility.

Electrical Insulation

Arkema provides advanced insulating materials that reinforce safety and reliability across battery systems. Zenimid™ polyimides deliver exceptional thermal resistance and dielectric strength supporting FPCB applications in battery management systems and busbars thermal runaway protection. #Rilsan®PA11 also contributes to electrical protection by providing durable, lightweight solutions for busbar insulation.

Thermal Management

For effective system-level heat control, Rilsan® PA11  and Rilsamid® PA12 offer proven performance in cooling lines and connectors. Complementing these materials, Bostik delivers high-performance thermal interface materials that enhance heat dissipation at module and pack level while maintaining structural stability in demanding operating conditions.

Assembly

Bostik also provides a complete range of sealing and bonding technologies designed for efficient and reliable battery assembly. This includes debond-on-demand solutions such as Primer Prep DB for controlled disassembly, high-reliability gasketing sealants for housing and pack integration, and robust 2K MMA and 2K PU structural adhesives for cell-to-module and cell-to-pack assembly. These solutions support manufacturing efficiency and long-term battery performance.

source : Arkema

Today's KNOWLEDGE Share : Shrinkage is one of the most fundamental factors in Injection molding process

Today's KNOWLEDGE Share

In injection molding, shrinkage is one of the most fundamental and misunderstood factors affecting final part dimensions.

Materials science tells us that shrinkage is volumetric, governed by pressure, cooling, and temperature.

But mold-making practice relies on a linear shrinkage value listed in the Technical Data Sheet (TDS), measured on a standardized test bar under controlled conditions.

This creates a challenge in how we approach accuracy, because the TDS value reflects the behavior of a controlled specimen, while your molded part experiences completely different conditions: geometry-dependent cooling, pressure profiles, crystallinity, flow orientation based on gate location and type, and wall-thickness variations.

👉 Shrinkage is not to be defeated — it is to be anticipated and managed.

This is why managing shrinkage becomes central to dimensional accuracy and repeatability. The methodology relies on understanding the actual conditions inside your part and preparing for the dimensional changes that occur after demolding.

👉 Simulation predicts what your part will do — not what the test bar did.

When I run a flow analysis, my goal is to predict the internal behavior that will ultimately drive dimensional outcomes after the part has cooled and stabilized.

This provides actionable insight at three levels:

Part design: Validate wall-thickness strategy, gate type and location, ribs and bosses, and identify areas sensitive to shrinkage or warpage.

Mold making: Support cavity scaling decisions, reduce uncertainty regarding dimensional deviation risks, and prepare the mold for dimension calibrations.

Injection settings: Show how holding pressure, cooling balance, and melt temperature influence final part dimensions and their stability over repeated cycles.

A useful way to view the workflow is:

TDS shrinkage = the rough map

Flow simulation = the GPS

Mold trials = the controlled production stage that provides real, measurable parts for dimensional evaluation

Steel-safe adjustments = applying these measurements to refine cavity dimensions and reach the target accuracy

A structured approach like this makes shrinkage predictable, supports dimensional accuracy, and strengthens the repeatability of every injected part.

🔥 Shrinkage happens — Precision is achieved through methodical work

source : Zachi Fizik