Today's KNOWLEDGE Share:How to choose flame retardant?

 Today's KNOWLEDGE Share

How to choose flame retardant?

According to the nature of the flame retardant material suitable for which #flameretardant #mechanism , in order to choose flame retardants.

1.Heat absorption mechanism

Some flame retardants will decompose when heated to generate water, water evaporation to take away a lot of heat, so as to achieve the effect of flame retardant, which is the same as the principle of using water to extinguish fire, such common flame retardants are #borax, #aluminumoxide hydrate, etc..

2.Covering effect

Some flame retardants will decompose when heated to generate a stable cover layer, making the material isolated from oxygen, so as to achieve the effect of flame retardant, commonly used flame retardants such as #phosphateester compounds and fireproof foam coatings.

3.Dilution effect

Some flame retardants will decompose when heated to generate a large number of non-flammable gases (carbon dioxide, ammonia, chlorine chloride, etc.), dilute the air around the material, significantly reducing the concentration of oxygen, so as to achieve the flame retardant effect, which is the same as the principle of dry powder fire extinguishers, such common flame retardants are phosphoric acid amine, amine chloride, amine carbonate, etc.

4.Inhibiting effect

The burning of some polymer materials is mainly a free radical chain reaction, and some substances can capture the active intermediates of the combustion reaction, etc., and inhibit the free radical chain reaction, so that the burning rate is reduced until the flame is extinguished. Commonly used flame retardants are bromine, chlorine and other organic halogen compounds.

Source:Sandy xu

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#flameretardant #fireresistant #wireandcable #engineeringplastics #polymers #plasticsindustry

Innovative fibre technology could revolutionize building construction

With the Texoversum, Reutlingen University has put into operation a training and innovation center for the textile industry that is unique in Europe. The almost 2,000 square meter textile-like façade of the new building also causes a sensation architecturally: It charmingly combines the innovative power of this industry with the 160-year tradition of Reutlingen as a textile location. The highlight: The components were wound from fibres that are fixed with a special plastic resin.

The façade of the Texoversum is just one example of a brand new technology that could completely revolutionize the construction industry. The sophisticated structure was designed on the computer and is based on #carbonfibres wound by #robots. Similar to networks in nature, for example in spider webs, beetle wings or palm leaves, the fibre structures are also very lightweight, but at the same time highly resilient, and require very little material. This not only saves resources, but also facilitates transport and assembly of the components.

The co-inventor of the innovative technology is architect Prof. Moritz Dörstelmann, whose company FibR also realized the façade of the Texoversum: “In contrast to conventional steel and concrete structures, we are able to get by with a minimum of material, because the robots only process as many fibres as are needed for the strength of the respective structure. As a result, we also save large amounts of #CO₂emissions.” Dörstelmann also sees advantageous applications for the technology in roof structures, supports and, not least, interior fittings.

The necessary strength and durability of the #composite is provided by #Covestro’s #aliphatic #polyurethane resin system Desmocomp®, in which the fibres are embedded as if in a matrix. “The resin is highly resistant to weathering and the sun’s high-energy #UVradiation, making it very suitable for outdoor applications,” explains Pejman Norastehfar, architect and specialist for #construction applications in Covestro’s #coatings and #adhesives segment. “Other plus points in the construction sector are its excellent chemical and #flameresistance.”

In the Texoversum, the spun #façade performs several important functions at once: it gives the building a unique look and stabilizes the surrounding balconies. It also serves as a railing and provides the necessary shade for the glass front behind it.

The building provides approximately 3,000 square meters of space for workshops, laboratories, a textile collection, think tank space and classrooms. The costs for the construction of the Texoversum amounting to 18.5 million euros were borne by the employers’ association Südwesttextil, whose members include FibR GmbH in Kernen, east of Stuttgart.

Source:covestro/jeccomposites.com

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Braskem & SCG Chemicals Sign JV Agreement to Create Bio-ethylene Plant in Thailand

Braskem, a biopolymer producer, and SCG Chemicals, a petrochemical company in Thailand and Southeast Asia, sign a joint venture (JV) agreement to create Braskem Siam Company. The joint venture aims to produce bio-ethylene from bio-ethanol dehydration and to commercialize I'm green™ bio-based polyethylene (PE), using the EtE EverGreen™ technology.

The technology results from the partnership agreement between Lummus Technology LLC and Braskem B.V. to develop and license this technology.

Sugarcane-derived Polyethylene:

I'm green™ bio-based polyethylene is a plastic made from a #sustainably sourced renewable raw material (ethanol from sugar cane) instead of traditional fossil feedstock (e.g., naphtha from oil). This promotes a significant reduction of the plastic's carbon footprint which helps combat climate change.

I'm green™ bio-based polyethylene is used in a variety of products, from packaging for food and beverage to personal and home care products, toys, houseware, and plastic bags, to name a few. It can also be mechanically or chemically recycled just as regular polyethylene.

The bio-ethylene plant, that will enable the production of the I'm green™ bio-based polyethylene is the first of its kind outside of Brazil. The new plant in Thailand will almost double the existing capacity of I'm green™ bio-based polyethylene to meet the growing demand for biopolymers globally, with a focus on the fast-growing demand for sustainable products in Asia.

The combination of #braskem 's #biobased plastics know-how with SCG Chemicals' position in the Asian market and expertise in PE production provides a solid business basis for the joint venture. Braskem will contribute with proven technology through its partnership with #Lummus Technology, operational experience in the ethanol dehydration process.

SCG Chemicals will provide expertise in high-quality polyethylene grades for different applications, operational excellence in #polyethylene manufacturing and market reach in Southeast Asia.

Meeting Increasing Demand for Sustainable Solutions

"We are always looking for opportunities to expand the I'm green™ bio-based PE offer to deliver circular low carbon alternatives to our customers to meet their increasing demand for sustainable solutions,” said Roberto Bischoff, chief executive officer of Braskem.

“This partnership with #SCGChemicals is aligned with our commitment to produce 1 million tons of green products by 2030, replacing fossil with #renewablefeedstock, and contributing to lowering the #carbonfootprint of our industry," added Bischoff.

Source: Braskem/specialchem

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Today's KNOWLEDGE Share:Mold Temperatue importance in Injection Molding

Today's KNOWLEDGE Share

Do you really understand how important mold temperature is in Injection Molding ?

When molding semi-crystalline materials, a higher mold temperature will accelerate crystallization and possibly reduce (Yes, REDUCE) cycle time (see top right kinetic curve), while producing a stiffer part.

When molding amorphous polymers, the degree of Physical Aging induced by a higher mold temperature will lead to a higher Yield Stress (left graph) and serious consequences on mechanical response. Creep performance and Impact will change by orders of magnitude, in opposite directions.

Many erroneously interpret these effects as being due to residual stresses.

Source:Vito Leo

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#plastics #injectionmolding #polymerscience #molding #temperature

Solar is soaring with more investment in porjects aross the globe

Solar is set to attract more capital than global oil production in 2023 for the first time.
This reflects the major shift taking place in energy systems around the world. And it's another sign that clean energy is moving faster than many people think:

 https://iea.li/3EhE7G5

Source:Faith Birol
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GluECO Adhesives’ Biobased Adhesive Line Earns USDA Certification

GluECO Adhesives has received the U.S. Department of Agriculture (USDA) certified biobased product label for BondAmaize™ Adhesives.

According to the company, BondAmaize™ has been certified as containing 98% biobased content, far exceeding any other #USDA-certified adhesive. In fact, 83% of certified #adhesives contain less than 50% biobased content.

Address Climate Change

BondAmiaze™ line of adhesives are fully #sustainable and contains renewable raw materials. Formulations can be easily fine-tuned to achieve performance characteristics for specific applications, materials and ambient conditions. GluECO is presently focusing on the packaging, textile, and construction industries. The adhesive can also produce a clear, flexible, food-safe film which is ideal for use as a laminating adhesive for flexible food packaging.

BondAmaize™ products can now display a unique USDA label that highlights its percentage of biobased content. Third-party verification for a product's biobased content is administered through the USDA BioPreferred® Program, which strives to increase the development, purchase and use of biobased products.

#Biobased products help address climate change by offering renewable alternatives to petroleum-based products; sequester carbon dioxide, lowering the concentration of greenhouse gasses in the atmosphere that contribute to climate change; create and expand markets; are generally safer for people and the environment than their petroleum-based counterparts; and represent incredible technological advances and innovations.

The USDA Certified Biobased Product Label displays a product's biobased content, which is the portion of a product that comes from a renewable source, such as plant, animal, marine or forestry feedstocks. Utilizing renewable biobased materials displaces the need for non-renewable petroleum-based chemicals. Biobased products are cost-comparative, readily available, and perform as well as or better than their conventional counterparts.

Source: ACS/Specialchem

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Can 3D Printing Make Retreaded Tires Greener?

Virginia Tech tire retreading research applies 3D scanning and printing for better commercial truck tires.

The #tire retreading industry applies fresh tread to 4.5 million tires a year, and Mordor Intelligence forecasts the global #retreading market to grow from $5.45 billion this year to $6.41 billion in 2028.

While each of these tires represents the reuse of most of a tire, there is still 9 pounds of material removed on average from each of those tires, generating a mountain of waste rubber. Compounding the matter is the fact that the retreaded tires that are commonly used by #commercialtrucks have more rolling resistance than new tires, which causes those trucks to burn more fuel than they would otherwise, said Chris Williams, Professor of Mechanical Engineering at Virginia Tech.

The university is working with a former colleague now at the New Mexico and #michelin to develop #3dscanning and printing techniques and materials that will produce retreaded tires that produce less waste and that roll more easily, so that customers can reap the circular economic benefits of retreading without as much penalty from these problems.

The effort is a two-year, $1.5 million project backed by the REMADE Institute in search of improved efficiency in retreading. The REMADE Institute is a public-private partnership established by the U.S. Department of Energy that is dedicated to accelerating the nation’s transition to a #circulareconomy .

“We are really excited to undertake this challenging project, which integrates advances in polymer science and manufacturing including 3D scanning, 3D printing, and industrial robotics,” said Williams. “If all goes well, the resulting retreading technology could result in annual reductions of about 90 metric kilotons of tire waste and 800 metric kilotons of #co2emissions across the retreading industry.

The team’s approach will be to use 3D scanning technologies, new materials that can both be printed and resist the solicitations of commercial vehicle tires, as well as #industrialrobots that can print these materials only at selected locations around the used tires.

While today’s process removes the entire tread of the old tire, the Virginia Tech process would only remove the bad portions, adding new material in those places. They 3D print the cushion rubber onto the tire surface in those places, providing the glue needed to attach the fresh tread.

The challenge is that the cushion #rubber is a thick material that doesn’t flow well when it is printed onto the tire surface and it doesn’t cure quickly, so these were key areas targeted by the project, said Williams.

Tim Long, who recently moved from Virginia Tech to Arizona State, provides expertise in the polymers being tested, while Williams is responsible for developing the 3D printing process.

Because 3D printers generally print on flat surfaces and tires are circular, the Virginia Tech printer works its way around the target tire as it prints so that it can create a curved surface.

Now, at the mid-way point of the two-year project, the team has developed promising materials and techniques, so the coming year will involve employing them to produce actual tires and to test those tires to learn their characteristics. "Right now our material is showing the same performance of the traditional bonding rubber, so that is very exciting," Williams said. "We know we can 3D print it, so that is very exciting, and we have just finished building our robotic work cell with the scanning capabilities. So we’re ready for year two, where we put all those pieces together.

That means checking the real-world performance of these various components. "Now we look at how well our printer rubber attaches to the old rubber and make sure the whole ‘sandwich’ comes together," he continued. "The biggest test will be that we are sending some of our printed materials down to our partner, Michelin, and they’ll actually put them on a test track on a vehicle in the next year."

This will truly be a case of seeing what happens when the rubber meets the road. "The lab results suggest this is good, but now we’ll do an actual test on an actual vehicle."

Source:plasticstoday.com

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