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Researchers from the University of Birmingham, U.K., and Duke University, U.S., have created a new family of polymers from sustainable sources that retain all of the same qualities as common plastics, but are also degradable and mechanically recyclable.

Kunststoffe, biobasiert

Kunststoff-Recycling

Recyclable Plastics Based on Sugars

The chemicals group will build a new hexamethylene diamine (HMD) plant in Chalampé, France, and plans to expand polyamide 6.6 production in Freiburg, Germany.

Polyamide

BASF Expands Polyamid 6.6 Business

The infrared welding is a well-established process in the industrial production of parts in various applications. However, the complex emitter-material interaction, which influences the meltdown behaviour of the plastic parts, results in a high effort for the process setup. A smoking of the plastic parts is to observe in numerous industrial infrared welding processes. The correlations between the smoking of the plastic, its temperature and thermal-oxidative degradation as well as the mechanical properties of the resulting welds are unidentified yet. Furthermore, in industrial infrared welding processes often high changeover times and varying joining part temperatures are existent.

Verbindungstechnik Verfahren

Faserverbundwerkstoffe

Organobleche (gewebeverstärkte Thermoplast-Halbzeuge)

Contribution to Infrared Welding of Plastics in Industrial Manufacturing

The concept of bioplastics as sustainable and environmentally friendly materials has become increasingly interesting in both academia and industry. Consequently, many researchers have made great effort in developing bioplastic materials. As new challenging materials, there is still a lack of in-depth understanding of the process−structure−property relationships, especially in multi-phase component nanocomposites.

Polybutylenterephthalat

Blend

Biokunststoffe

On the Process-Structure-Property Relationships of Poly(Lactic Acid)-Based Nanocomposites

Driven by necessary energy and cost savings, plastics are increasingly applied as primary components in tribological systems. The trend is marked by research and development regarding the effectiveness of different material compositions in reducing friction and wear, in which friction induced heat is one of the main challenges.

Werkstoffprüfung

Tribologie

Systematic Use of the Chemical Transformation of Magnesium Hydroxide — a New Approach for Polymer Tribology

To ensure better stability of expanded polystyrene insulation panels on the house wall, they are fastened with an additional polypropylene (PP) anchor. However, the fact that two different materials are used results in thermal bridges due to different thermal conductivities (TC), which can be seen visually as the formation of mold and algae, but also cause energy losses. The motivation for this work was to adjust the WLF of the two materials by using a filler, but not to negatively influence the mechanical strength of the anchor.

Verbundwerkstoffe / Werkstoffverbunde

Polypropylen-Compound

Polypropylen

Füllstoffe für Kunststoffe

Modification of a polypropylene matrix by the use of hollow glass microspheres

Continuous fibre-reinforced polymers (FRP), based on flat sheets, benefit from excellent weight-specific features. These include the possibility of load path optimised design and the option of functional integration. Consequently, FRP offer a high potential for lightweight design. Materials using thermoplastic-based polymers (so-called „organic-sheets“) allow fully automated and fast manufacturing based on their physical processing and are environmentally sustainable because of their recycling capability. Additionally, through improved optical and aesthetic characteristics, new applications can be developed for a mid to high scale production range.

Kunststoff-Halbzeuge

Leichtbau

Oberflächentechnik

Surface optimisation of continuous fibre reinforced thermoplastics

Pultruded, fiber-reinforced tapes have so far only been tested destructively or optically non-destructively. It would therefore be desirable to have a non-destructive testing method that can detect cracks, inclusions and changes in the impregnation quickly and without contact, i.e. that can detect the complete tape volume in contrast to optical methods. The air-coupled ultrasonic method used in this work meets all these requirements.

Kohlenstofffasern / -matten

Zerstörungsfreie Werkstoffprüfung

Pultrusion

Qualitätssicherung Kunststoff

All-embracing Approach of Non-destructive Testing of Thermoplastic CFRP Tapes Using Air-coupled Ultrasound

Foam injection molding is a processing technology to produce foamed plastic parts in serials production, attaining an increasing interest and use in industry. However, the applications are limited due to insufficient knowledge of processing and mechanical properties, limited use of light-weight potential as well restricted surface qualities. All these drawbacks are associated with the cellular structure. The structure characteristics like skin layer thickness, cell size, density and uniformity are developed during procedure. Thus, controlling the cell formation process is the key to work against the restrictions and optimize mechanical properties.

Schaumspritzgießen

Schaumstoffe

Spritzgießsimulation

Schäumen / Reaktive Verarbeitung

Industrie 4.0 für die Kunststoffverarbeitung

Controlling cellular structure in thermoplastic foam injection molding – influence of processing and mold technologies

Due to the low thermal conductivity of the polymer matrix, fiber reinforced polymers exhibit a low thermal conductivity compared to metals. By increasing the thermal conductivity and thereby decreasing thermal stresses in the part, an enhancement of its lifetime can be expected.

Beschichten von Kunststoffen

Wärmeleitfähigkeitsmessung

Epoxy Based Carbon Fiber Reinforced Polymers with Enhanced Thermal Conductivity – Structure and Properties

Additive manufacturing, such as the selective laser sintering (SLS), provides the possibility to manufacture structures as 3D-MIDs tool free. The first three-dimensional circuit carriers are already manufactured by selective laser sintering. An established method is the LPKF-LDSprototyping process. Different from conventional 3D-MIDs this process requires an ensuing coating of the additive manufactured circuit carrier with a metal compound containing substance to enable the direct structuring by laser. Commercially available materials for injection molded 3D-MIDs already contain certain additives for laser direct structuring, that can be activated by laser. Thus, the demand for functional powder compounds for the selective laser sintering process to design three-dimensional circuit carriers is mandatory.

Structures and properties of selective laser sintered polyamide- and polyamide-copper-systems for applications in three-dimensional circuit carriers

Expandable polystyrene (EPS, coll. “Styropor”, “Unicell”, “Styrofoam”) is one of the most used foams. It accounts for one quarter of the current foam production in terms of volume. EPS has a multi-scale morphology since EPS parts consist of many fused foamed beads. The foamed beads themselves contain cells, which are formed of walls and struts as well as the cell gas. In this frame, a variation in bead size causes a significant change of surface area, which needs to be moulded, whereas the variation in cell size leads to an altered micro-morphology (cell walls and struts). However, the effect of the multi-scale morphology on the properties has never been studied in a comprehensive manner to the knowledge of the author. Hence, the aim of the work is the establishment of structure-property relationships as well as the clarification of their fundamental mechanisms for the purpose to be able to tailor the structure for a specific application. Thus, further material and cost savings could be possible. EPS and a bead foam made from a blend of polystyrene and polyethylene were studied regarding the effects of cell size, bead size and density on the mechanical and thermal behaviour. Furthermore, the distribution of polymer within a single bead was controlled by the introduction of a solid skin around the beads.

Structure-property relationships of polystyrene-based bead foams

Epoxy-carbon fiber prepregs have been used increasingly by civil aerospace industry to manufacture the structural composite parts due to their excellent mechanical, thermo-mechanical and thermal properties at the cured state. Although carbon fibers are electrically conductive, due to the insulating nature of the epoxy matrix, epoxy-carbon fiber prepreg laminates mostly act as a semiconductor in the through-thickness direction. Nowadays, an enhanced through-thickness electrical conductivity is as well desired for modern composite applications, where a certain level of electrostatic dissipation, electromagnetic shielding or an enhanced lightning strike resistance is necessary.

Towards electrically conductive and interleaf-toughened carbon black-epoxy-carbon fiber laminates with enhanced lightning strike resistance

Together, the two companies want to tackle the challenge of plastic packaging waste and its recycling.

Kreislaufwirtschaft

Borealis and Reclay Establish Strategic Partnership

The growing demand for plastic recycling directly reflects the machine sales for Polystar. By the end of April 2022, a total of over 110 recycling machines will have been shipped within 12 months – twice as many compared to last year.

Extrusionsanlagen

Sales Doubled for Polystar in 2021

Erema enters a new dimension with large-scale recycling plants. Up to 40,000 tonnes per year of rPET can now be produced. The first plant of this size has been shipped to Brazil.

Polyethylenterephthalat

Extrusions-Zubehör

XXL Recycling Plant for Brazil

Under the term “green products” the plastics distributor and service provider is developing a portfolio of sustainable products that customers can use in visual communication.

thyssenkrupp Plastics Develops Green Product Range

TotalEnergies and Plastic Omnium have signed a strategic partnership that will see them join forces to design and develop new plastic materials, made from recycled polypropylene.

Recycled Plastic Materials for Automotive

The fifth Plastics Recycling Show Europe (PRSE) exhibition and conference held earlier last month in Amsterdam, The Netherlands, attracted a record number of visitors and exhibitors from across Europe.

Record Numbers Attend Plastics Recycling Show Europe 2021

RadiciGroup and DKB introduce the first “circular” ski suit made of yarn obtained from recycled materials and designed with end-of-life recyclability in mind.

Sustainability on the Slope

At the Plastics Recycling Show Europe in Amsterdam, Netherlands, the winners of the Plastics Recycling Awards Europe 2021 were announced.

Winners of the Plastics Recycling Awards Europe 2021

News Circular Economy

Rehau is developing an additive manufacturing process that can turn out large polymer manholes in single-unit batches.

Additive Manufacturing Process Revolutionizes Process Chain in Civil Engineering

Anlagen Additive Fertigung / 3D-Druck, Kunststoff

Hoch- und Tiefbau

Additive Fertigung

Fused Deposition Modeling Kunststoff, Glas, Karbon, Metall

Large Components Custom-Built  in One Week

From 25 to 28 January, the OOO Engel team presents its booth in Moscow again. The injection molding machine manufacturer and system solution provider headquartered in Austria is making the huge potential of digital solutions tangible by producing technical parts live on a tie-bar-less victory injection molding machine.

Spritzgießen

Spritzgießmaschinen, allgemein

Spritzgießmaschinen

The Benefits of Tie-Bar-Less Technology

 Tosaf presents flame retardant masterbatches and compounds which are either free of halogens such as bromine and chlorine or free of antimony.

Masterbatches

Flammschutzmittel

Additive

Environmentally Friendly and Effective

Selected Makrolon RE grades from Covestro are climate-neutral from cradle to gate, thanks to the usage of renewable electricity for Covestro production processes and the introduction of raw materials coming from mass-balanced bio-waste and residues.

Kunststoff Werkstoffe

Technische Kunststoffe

Erneuerbare Energie

Polycarbonat

Covestro Produces Climate-Neutral Polycarbonate

Union Officine Meccaniche designs and produces inside its industrial unit a wide range of extrusion lines for sheets, boards, rigid and foam profiles and advanced equipment for the production of sheets and foam boards in XPE, XPS, XPP and XPET.

Flachfolien- und Plattenextrusion

XPS Lines for Sheets, Boards, Rigid and Foam Profiles

Additives manufacturer Milliken has developed viscosity modifiers specifically for recycled polypropylene (rPP). The products, called DeltaFlow, improve the flow behavior of rPP for extrusion and injection molding processes, according to the company.

Improved Processing of Recycled PP

Avient Corporation, Cleveland, OH/USA, presents Gravi-Tech density-modified thermoplastics that enable advanced metal plating surface treatments to deliver both the look and feel of metal in premium packaging applications.

Duroplastische Werkstoffe

Duroplaste

Metallization Grades for Luxury Packaging

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