Today's KNOWLEDGE Share : Why Design & Simulation Matter in Extrusion Systems

Today's KNOWLEDGE Share

Why Design & Simulation Matter in Extrusion Systems

In extrusion technology – whether die heads, extruders, blown film, cast film, or MDO units – the quality of design defines the performance of the entire system.

A well-engineered design supported by advanced simulation tools (flow analysis, thermal, and structural simulations)ensures:

✔️ Uniform melt distribution inside die heads → consistent film thickness

✔️ Optimized screw geometry → higher throughput with lower energy consumption

✔️ Controlled cooling and stretching → improved film properties in MDO and cast film lines

✔️ Reduced trial-and-error → saving cost and accelerating time to market

Design without simulation is guesswork.

Simulation without deep process knowledge is incomplete.

🔑 Combining both is what leads to efficient, reliable, and sustainable extrusion systems.

Innovation in extrusion design is not about adding complexity – it’s about applying engineering intelligence + simulation accuracy to achieve better performance with fewer resources.

source : Shady Aboali

OQ and Milliken Collaborate to Bring New Injection Molding Grade to Market

OQ, an energy investment and development company, and diversified global manufacturer #Milliken & Company today announced the introduction of a new clarified random copolymer for injection molding applications.

OQ utilized Milliken’s #Millad®NX®8000 ECO additive solution to debut its Luban RP2251T #injectionmoldinggrade that has a superior aesthetic appearance and can be processed at significantly lower temperatures, enabling converters to generate #energysavings and improved #productivity due to reduced cycle times.

This innovation enables converters to reduce energy consumption and achieve higher productivity, directly contributing to sustainable manufacturing and #packaging solutions that meet evolving global needs.

“From product development to full commercialization, we are proud to collaborate with #OQ to introduce their first injection molding grade made with our Millad clarifying agent,” said Maria Di Nolfo, Europe Sales Director at Milliken. “We are eager to see OQ meet the growing demand for highly transparent reusable products with lower energy consumption.

#LubanRP2251T offers excellent transparency and organoleptic performance. The grade is typically used in the production of #thinwalledpackaging with high transparency and stringent requirements for #organoleptic properties.

“At OQ, we’re driven by innovation that delivers real-world performance, sustainability benefits and solutions for global megatrends. Luban RP2251T is a great example of how OQ and Milliken are advancing polymer performance, combining excellent clarity with lower energy use and faster cycle times,” said Abdulrahman Al Tamtami, VP Global Marketing at OQ.

OQ’s Luban RP2251T is enhanced with Millad clarifying agent, which provides excellent aesthetics and processing efficiency, enabling converters to achieve up to 10% energy and cost savings by processing the grades at lower temperatures and with shorter cycle times than similar products in the market, which use different clarifying agents.

source :Milliken

Today's KNOWLEDGE Share : Removing yellow stains from fabric with blue light

Today's KNOWLEDGE Share

Removing yellow stains from fabric with blue light

Sweat and food stains can ruin your favorite clothes. But bleaching agents such as hydrogen peroxide or dry-cleaning solvents that remove stains aren’t options for all fabrics, especially delicate ones. Now, researchers in ACS Sustainable Chemistry & Engineering report a simple way to remove yellow stains using a high-intensity blue LED light. They demonstrate the method’s effectiveness at removing stains from orange juice, tomato juice and sweat-like substances on multiple fabrics, including silk.

Our method utilizes visible blue light in combination with ambient oxygen, which acts as the oxidizing agent to drive the photobleaching process,” says Tomohiro Sugahara, the study’s corresponding author. “This approach avoids the use of harsh chemical oxidants typically required in conventional bleaching methods, making it inherently more sustainable.

Yellow clothing stains are caused by squalene and oleic acid from skin oils and sweat, as well as natural pigments like beta carotene and lycopene, present in oranges, tomatoes and other foods. UV light is a potential stain-removing alternative to chemical oxidizers like bleach and hydrogen peroxide, but it can damage delicate fabrics. Sugahara and Hisanari Yoneda previously determined that a high-intensity blue LED light could remove yellow color from aged resin polymers, and they wanted to see whether blue light could also break down yellow stains on fabric without causing damage.

Initially, they exposed vials of beta-carotene, lycopene and squalene to high-intensity blue LED light for three hours. All the samples lost color, and spectroscopic analyses indicated that oxygen in the air helped the photobleaching process by breaking bonds to produce colorless compounds. Next, the team applied squalene onto cotton fabric swatches.

After heating the swatches to simulate aging, they treated the samples for 10 minutes, by soaking them in a hydrogen peroxide solution or exposing them to the blue LED or UV light. The blue light reduced the yellow stain substantially more than the hydrogen peroxide or UV exposure. In fact, UV exposure generated some new yellow-colored compounds. Additional tests showed that the blue LED treatment lightened squalene stains on silk and polyester without damaging the fabrics. The method also reduced the color of other stain-causing substances, including aged oleic acid, orange juice and tomato juice, on cotton swatches.

High-intensity blue LED light is a promising way to remove clothing stains, but the researchers say they want to do additional colorfastness and safety testing before commercializing a light system for home and industrial use.

The authors do not have an external funding source for this work. They are employed by Asahi Kasei Corporation, a company that develops fiber products, chemicals and electronic materials.

source : The American Chemical Society (ACS)

Today's KNOWLEDGE share:PET Vs PETG: THE MAIN DIFFERENCES

Today's KNOWLEDGE share:

PET Vs PETG: THE MAIN DIFFERENCES

A basic formula for making polyesters, like PET and PETG, is the combination of acid monomers plus glycol monomers. In the case of PET, the acid is usually DMT (dimethyl terephthalate) and the glycol is ethylene glycol. These two monomers are the building blocks of the final long-chain polymer: polyethylene  terephthalate.

For creating PETG, the same monomers are used, except some ethylene glycol (30-60%) is substituted with a different glycol monomer, CHDM (cyclohexanedimethanol). So it’s not that PETG has significantly more or less glycol than PET, it just has a different type of glycol. Therefore, the -G in PETG represents the chemical modification of the typical PET structure with CHDM glycol units, or “glycol-modified” for short.

The key impact of this glycol modification from a physical standpoint is that semi-crystalline PET gets transformed into amorphous PETG. Let’s quickly review what crystallinity has to do with polymers and why it's relevant to 3D printing.

In a few words, amorphous polymers have all their chains arranged randomly, much like a bowl of spaghetti. Semi-crystalline polymers contain regions of crystallinity where chains are highly-ordered and densely packed. This has an enormous impact on material properties.

Semi-crystalline materials are generally more rigid compared to a totally amorphous counterpart, as crystalline regions can function as reinforcement. This holds true for semi-crystalline PET and amorphous PETG.

While cooling, semi-crystalline materials are prone to warping caused by changes in density brought on by the formation of crystalline regions. This means amorphous PETG is much more manageable for 3D printing. Semi-crystalline PET, on the other hand, requires stricter printing and ambient temperatures to prevent distortions.

PET also has a slightly higher working temperature compared to PETG due to its crystalline nature. While this may make it more difficult to print with, PET will hold up better in applications that require some thermal resistance.

You may also notice visual differences between the two materials. The purely random nature of the polymer chains in PETG creates glossy or even transparent filaments. PET, as a mixture of crystalline and non-crystalline regions, will have some haziness.

Crystalline structures, like those of PET, don’t play well with extrusion. Crystallization is difficult to control and can begin as soon as the plastic is just a bit too cool. Manufacturers often facilitate extrusion using additives that hinder crystallization.

On the other hand, glycol modification of PET renders it an amorphous material that can easily be modeled via extrusion, injection molding, and other thermo-forming processes. This is the key to the success of PETG.

Source:all3dp

Visit MY BLOG http://polymerguru.blogspot.com 

#3dprinting #plastics #pet #petg #molding

Today's KNOWLEDGE Share : 3D printing in medical applications

 Today's KNOWLEDGE Share

🧠 Can we already 3D print human bone – and can it ever match the real thing?

3D printing has opened incredible doors in medicine:

🖨️ Custom implants,

🧬 Patient-specific guides,

🧫 Even bioprinted tissues.

And now we ask: Can we 3D print bone?

The idea sounds magical design a defect-specific structure, print it, implant it, and let it heal.

But as exciting as it is, we need to ask:

👉 Can a printed bone truly replace what biology has perfected over millions of years?

The answer isn’t simple — because real bone isn’t just a shape.

It’s a living, dynamic tissue made of:

• Haversian canals

• Cortical and trabecular architecture

• Biomechanical gradients

🦴 Natural bone is never just a block of material.

3D printing brings us closer in terms of geometry — but structure, remodeling, and biological function remain major challenges.

💬 Here’s the issue:

How do we make printed bone as hard, elastic, and biologically responsive as real bone?

What “glue” holds the printed structure together — and how do we replicate true integration?

They may look similar — but printed models lack the internal complexity and adaptability of living bone.

💡 That’s why biological implants like the Surgebright are so exciting:

🦈 Made from 100% human cortical bone,

🧬 Fully remodelable, revascularizable, and naturally integrated.

📉 No metal, no removal surgeries, no compromise in healing.

Shark Screw® doesn’t try to imitate bone — It is bone.

With over 8,000 successful cases and growing international use, it shows what’s possible when we work with biology, not against it.

So what do you think?

➡️ Will 3D printing ever catch up?

Or are allografts and natural scaffolds already the better way forward in many cases?

👇 Let’s discuss.

source : Thomas Pastl

Dow introduces high-temperature silicone gel to boost efficiency in EV power electronics

Dow has launched DOWSIL EG-4175 #SiliconeGel, a protective material designed to support next-generation insulated gate bipolar transistor (IGBT) modules operating at higher voltages. This new gel withstands temperatures up to 180°C and is targeted at power electronics in #electricvehiclebatteries and main inverters, as well as inverters used in photovoltaic panels and wind turbines.

According to Dow, #DOWSILEG4175 Silicone Gel is formulated to handle the elevated temperatures found in seventh-generation IGBT modules as battery voltages in EVs increase from 400 V to 800 V to improve inverter performance and enable faster charging. The gel is engineered for enhanced dielectric strength and thermal resistance, supporting higher power densities and enabling the handling of greater electrical loads.

The gel features self-healing properties to repair small cracks, vibration absorption, and self-priming adhesion to protect delicate electronics. It cures at room temperature for energy-efficient manufacturing, but the process can be accelerated with heat to reduce production cycle times. Dow also notes that this gel exhibits low levels of silicone oil bleed and adheres to substrates without the need for a primer.

The product builds on Dow’s existing portfolio of silicone-based dielectric gels that offer electrical insulation, encapsulation, mechanical stress relief, and environmental protection. DOWSIL EG-4175 Silicone Gel is complemented by DOWSIL EA-7158 #Adhesive—also formulated for IGBT modules—which offers one-part, high-strength performance, rapid heat curing and translucent color for easier inspection.

#Dow is upgrading our IGBT materials portfolio to address the emerging trend toward achieving higher power densities,” said Cathy Chu, global strategic marketing director, Consumer and Electronics, Dow. “With its higher-temperature resistance compared to incumbent materials, this new silicone gel will enable our customers to design and manufacture higher-density IGBT modules with greater power system efficiency.”

Both silicone-based products for #IGBTmodules are now available globally, according to Dow.

source: Dow /Chargedevs

Today's KNOWLEDGE Share : Google Pixel 10 Series Smartphones Employ TORAYCON™ Recycled PBT Resin

Today's KNOWLEDGE Share

Google Pixel 10 Series Smartphones Employ TORAYCON™ Recycled PBT Resin

Toray Industries, Inc., announced today that new #GooglePixel10 smartphones incorporate #TORAYCON ™, a chemically #recycledPBT resin. Google LLC launched this series on August 21.

Google lauded this #engineeringplastic for its excellent mechanical properties and colorability that is equivalent to that of virgin materials.

Toray provides the following diverse recycled resin and related offerings (see below) for customers looking to increase their recycled content.

Resin type : ABS, PA6, PA66, PBT, and PPS

Raw material : Post-industrial and post-consumer recycled materials

Recycling method : Mechanical and chemical recycling techniques

One goal of the Toray Group Sustainability Vision for 2050 is to contribute to a world in which resources are sustainably managed.

The company will keep catering to customer demand for recycled resin in keeping with its commitment to delivering new value and contributing to social progress.

source : Toray