Plexiglas - PMMA - Altuglas International

Kunststoffe international, 2005-11-21, Engineering Plastics: Products for Innovative Processes
...ve interiors, for which designers strive to achieve the best possible matt finish to create an elegant, high-quality impression. Polymethyl Methacrylate (PMMA) According to Degussa, one in every two vehicle rear lights in Europe is made of Plexiglas. A new design trend has been set for the rear light on the new Opel Astra. By using Plexiglas diffuser moulding material, a velvet-like surface is created with uniform light distribution and high light transmission. This means, for example, that the...

Kunststoffe international, 2005-11-21, Injection Moulding Microstructured Functional Surfaces
...ed. No differences arise when the parameters are well chosen. Changes to machine settings, however, do have a more pronounced effect on the detail reproduction. Figure 2 shows SEM micrographs of samples injection moulded from a standard PMMA (grade: Plexiglas 7N, manufacturer: Röhm GmbH, Darmstadt/Germany) at various parameters. To ensure good holding pressure effect, the maximum recommended melt temperature of 240°C was selected. It is clear that raising the holding pressure can improve fid...

Kunststoffe international, 2005-11-21, Market Growth Worldwide: Polymethyl Methacrylate (PMMA)
...ture for PMMA producers within the European Union over the past twelve months. One development worth mentioning is the purchase of the Barlo Group (including Barlo Plastics) by an investment group. The leading suppliers are still Degussa AG with its Plexiglas and Methacrylate divisions, Belgium's Barlo Plastics, Lucite International in the UK, France's Atoglas and Repsol in Spain. Independent extruders and casting companies are potentially set to become less important. This is due to the...

Kunststoffe international, 2005-11-21, Materials with Multiple Functions
... products like mobile phones as well as large parts like computer housings. Transparency for mobile phone displays: Due to its high transparency, maximum transmission and extremely small birefringence polymethyl metacrylate (PMMA; Plexiglas) from Röhm is a preferred material for production of windows for mobile phone displays (Fig.7). Thus according to a press release in March 2002 the display windows of current mobile phone series are manufactured by Siemens and Nokia with PMMA from Röhm. In a...

Kunststoffe international, 2005-11-21, Nanoscale NIR Absorbers: Permanently Mark Highly Transparent Plastics
...is possible – without any noteworthy change in transparency. This permits economical identification of transparent parts produced from this special PA. Fig. 3 shows the difference between Trogamid CX7323 with and without the NIR absorber. The Plexiglas grade of polymethylmethacrylate (PMMA) is one of the transparent plastics that inherently cannot be laser-marked by the usual Nd:YAG laser. If, however, a nanocomposite is created through use of NIR absorbers, light-coloured marking becomes possib...

Kunststoffe international, 2005-11-21, PMMA - A Substrate for DVD
...ation from economic and technical aspects. The physical and, particularly, the optical properties of PMMA meet the Red Book standards. The aliphatic polymer structure of PMMA conduces to an extremely low birefringence of less than 100 nm (figure for Plexiglas DQ 501: < 20 nm). Its refractive index (Fig. 2) is 1.49 and is thus on spec (requirement: 1.55 ± 0.1).The high elastic modulus of PMMA ensures absolute planarity even at high rotational speeds. Owing to the symmetrical structure of t...

Kunststoffe international, 2005-11-21, PMMA Successful in More and More Fields of Application: Polymethyl Methacrylate (PMMA)
...tion challenges in automobile manufacture and the demanding requirements for modern lighting concepts. It is these compounds that make many of the technical developments and creative design applications possible in the first place. With the brands Plexiglas, Plexalloy, Cyrolite and XT Polymer, the Methacrylates Business Unit of Degussa AG can offer developers a complete range of standard and specialty compounds for all injection and extrusion applications. Variety of New Applications from Coext...

Kunststoffe international, 2005-11-21, Polymethyl Methacrylate (PMMA)
...al in May 2002. Thus, competing manufacturers in the Western European market for PMMA plastics products are Barlo Plastics (Belgium), Lucite International (Great Britain), Repsol (Spain), Atoglas (France) as well as Degussa’s Business Unit Röhm Plexiglas (Germany). Furthermore, a series of “free” extruders and casting outfits are still active in the market. In the Western European market for PMMA moulding compounds, on the other hand, the major competitors are Ato, Lucite and Degussa’s Business ...

Kunststoffe international, 2005-11-21, Solar Modules: Plastics, Architecture and Photovoltaics
...taics opportunities are opening up for architects, designers and engineers. The module’s sandwich structure always follows the same principle (Fig.1): the top layer is always formed by a massive, highly transparent panel (PMMA, grade: Plexiglas, manufacturer: Röhm, or PC, grade: Makrolon, manufacturer: Bayer). Depending on the application, there are various options for the lower layer: For example, a massive 3 to 4mm thick PMMA or PC panel (transparent, coloured or translucent) or a PMMA or PC d...

Kunststoffe international, 2005-11-30, Nanoscale NIR Absorbers: 3D Laser Subsurface Engraving
...mers. The excellent dispersion necessary for nano-modification is the basic prerequisite for maintaining the high transparency of the polymer and generating an image of high resolution and brilliance. In principle, acrylic glass, e.g. Degussa’s Plexiglas, has many advantages over silicate glass. They include a significantly lower specific weight, ease of deformation and machining (high designer freedom) and high impact resistance. Silicate glass, if incorrectly handled, or stored for too long, ...

Kunststoffe international, 2006-02-23, Process Optimisation: Hot Embossing of Microstructures
...ea of the stamps is 9.1cm², and embossing pressures of 5.5MPa, 11MPa and 22MPa were applied. The trials involved various commodity and engineering plastics, including three amorphous, transparent polymers: - polymethylmethacrylate (PMMA, grade: Plexiglas 7H; manufacturer: Röhm GmbH, Darmstadt), - polycarbonate (PC) Makrolon 2805; manufacturer: Bayer MaterialScience AG, Leverkusen), - cycloolefin copolymer (COC, grade: Topas 6013; manufacturer: Ticona GmbH, Oberhausen), and two semi-crystalline, ...

Kunststoffe international, 2006-09-05, Hot Runner Solution for Warning Triangle: Caution, Special Requirement
...ment by all prominent manufacturers including Audi, BMW, Bentley, Jaguar, Land Rover, Mercedes, Mini, Porsche and VW. Factors Determining the Quality of the Mouldings. The three reflectors for the warning triangle are produced from a viscous PMMA (Plexiglas 8N grade) having a MVR of 3 cm3/10 min (Fig. 1). A need for high pressure in the hot runner, therefore, has to be anticipated and it must be designed accordingly. The material is particularly suitable for high-quality optical applications a...

Kunststoffe international, 2007-03-15, Tailgate Embedded in Foam
...003. At this early stage of development – approximately two and a half years before the start of series production – it is usual for a great many changes still to be made; for cost reasons, the windowpane was therefore replaced with Plexiglas display samples and the prototypes tested for rigidity and weight were replaced by a carbon-fibre-reinforced plastic part (CFR). For the same reason, the prototypes were moulded by casting in polyurethane instead of – as would later be the case for series p...

Kunststoffe international, 2007-10-21, Polymethylmethacrylate (PMMA)
... venture with Forhouse, the former Degussa started operation of another plant for the production of PMMA molding batches in Taichung, Taiwan, as early as in July 2007. The plant will have an initial capacity of some 40,000 t of high-quality Plexiglas molding batches for optical applications in flat-panel displays. However, not only will PMMA be produced on the site. The material will moreover be processed into lightning modules for flat-panel displays. The integrated supply chain makes sure the ...

Kunststoffe international, 2007-12-17, Still Demand for Innovation Potential
... to 100°C, is impact resistant and has a glow wire flammability index (GWFI) of 960. The polymer blend is also halogen-free, flame-resistant and UV-stabilized. Moreover, it is opaque. Evonik Röhm GmbH, Darmstadt, Germany, has developed in Plexiglas Cool Touch (PMMA) a pigmented molding compound that, because it reflects infrared radiation, results in 20% less heating of dark plastic surfaces. Possible applications of this molding compound are car body parts and roof modules, roofing materials, w...

Kunststoffe international, 2008-10-17, Polymethyl Methacrylate (PMMA)
...tics. These materials become increasingly yellow, deteriorating light utilization along with energy efficiency. PMMA, in contrast, constantly remains transparent. This is why Evonik Industries currently issues a 30-year warranty for a high number of Plexiglas plates. In the area of photovoltaics, a special sector, i.e. concentrated photovoltaics is growing in importance for the field of renewable energies. This technique employs a Fresnel lens with a special microstructure, which focuses the lig...

Kunststoffe international, 2010-01-27, Scratch-Resistant in One Step
...ne-free, two-part reactive system based on multifunctional acrylates. It hardens under the influence of heat and UV radiation. The CoverForm thermoplastic molding compound is a specially designed PMMA which Evonik supplies exclusively under the name Plexiglas cf. Since these two systems have been tailored to each other, the coating material bonds outstandingly to the surface of the thermoplastic compound. How It Works In developing the CoverForm process, KraussMaffei combined its in-house expert...

Kunststoffe international, 2010-08-19, Variothermal Temperature Control with Laser Radiation
...ted. In tests, it was possible to keep the temperature difference below 10°C. The mold insert microstructure generated by laser texturing has depressions with a diameter of 5 ?m and a depth of over 5 ?m. For molding, a PMMA (type: Plexiglas 7N; manufacturer: Evonik Röhm GmbH) at a melt temperature of 235°C was used. The maximum holding pressure was set to 800 bar; the holdingpressure time to 18 s and the residual cooling time to 60 s, with a basic mold temperature of 80°C. Scanning electron micr...

Kunststoffe international, 2010-09-24, Sustainable and Efficient
... be the major topics here. Another focus at the K2010 trade show will be on solar technology. Concentrated photovoltaics is regarded as a very efficient way to generate electric power right from the sunlight. With its new group of products named Plexiglas Solar, Evonik offers a comprehensive program consisting of molding compounds and massive plates for all types of demanding applications in the area of lens production for concentrated photovoltaics. Hall 6, booth B28 DSM New Generation of Polya...

Kunststoffe international, 2011-10-17, Bioplastics
...s. The materials goals of beverage producers Coca-Cola and PepsiCo have also led several companies to give strong consideration to producing biobased TPA. PMMA (e.g., Plexiglas) from renewable raw materials is ever closer to becoming a reality. Arkema of Serquigny, France, will supply bioacrylic acid beginning the middle of next year, for medical applications at first. Plastics specially developed from it exhibit extreme resistance to shock. Biotech companies, such as Rennovia ofMenlo Park, USA,...

Kunststoffe international, 2011-10-17, Polymethyl Methacrylate (PMMA)
...et recovery. In the years prior to that, a wave of consolidation had already occurred in Europe and NAFTA, while capacity expansions had taken place in Asia. In Europe, Evonik Industries expanded its capacity for extruded, scratchresistant, coated Plexiglas panels in mid-2011. Also starting in mid-2011 and over the next 2–3 years, there are plans to significantly expand capacity in Asia in anticipation of a strong increase in regional demand for PMMA. The largest investment projects include plan...

Kunststoffe international, 2012-07-23, Planning a Second Home
...PMMA in an environmental balance according to DIN ISO 14040ff. PMMA can also make a significant contribution to environmental protection in manufacturing. Current calculations for example show a CO2 equivalent of 3.8 kilograms of CO2 per kilogram of Plexiglas molding compound. Factors that are in line with the Chinese government’s 12th five year plan that, amongst other things, envisages promoting sustainable development and energy saving in industry. Energy efficiency and sustainability in Chin...

Kunststoffe international, 2012-10-15, A Matter of Combinations that Fit
...streets. Since, with their intensive light, they can backlight covers that are crystal clear, structured or lightdiffusing – with Evonik Industries AG in Darmstadt, Germany, supplying the suitable PMMA products under the brand name Plexiglas. For instance, Plexiglas molding compounds can be employed to make crystal clear covers for, e.g., street lights (Fig. 1), (anti-glare) workplace or office lights, or for other types of functional lamps. They guide the light by their structures. It is thus c...

Kunststoffe international, 2012-11-26, Scratch-Resistant and Anti-Reflective
...d surface for the injection compression molding machine (Fig. 7). On this insert, four different microstructured zones were created to find the optimum combination for an anti-glare effect. Evonik then trialed the microstructured insert with Plexiglas FT15 cf and CoverForm Reactive-Liquid CF30. Flabeg coated the test specimens produced in this way with an additional anti-reflective coating at its Fürth im Wald site in Germany using the physical vapor deposition (PVD) process. Thin layers in the ...

Kunststoffe international, 2013-07-22, Precision Injection-Compression Molding
...of an automatic algorithm. This controller allows both pvT-optimized and isobaric process flows to be realized. Quality Requirements In these studies, the quality requirements are discussed with reference to a PMMA biconvex plastic lens (Plexiglas 7N; manufacturer: Evonik Röhm GmbH, Darmstadt, Germany) (Fig. 3). Identification of Strehl Ratio and Reproduction Accuracy The Strehl ratio S is the ratio of the maximum observed intensity Ib to the theoretically possible intensity It of the pointsprea...

Kunststoffe international, 2014-01-23, K2013 Review: Anything but Superficial
...ures that enable the function of the sensitive input are embedded in this film. Evonik Industries AG, Essen, Germany, is working towards scratch-resistant surfaces with two further developments: Correspondingly coated Plexiglas-based glazing systems already satisfy the demands on scratch resistance for side, rear and roof glazings. On display on the booth was the concept vehicle microMax in which all the windows are made of Plexiglas. In the interior, Tegomer anti-scratch additives significantly...

Kunststoffe international, 2014-01-23, Transparent Plastics: Minimizing Scratch Marks
...ular on material properties rather than on processing parameters. In order that the specimens would have as little orientation and stress as possible, all materials, with the exception of the injection-compression-molded panels, were extruded from Plexiglas 8N CoverForm. The uncoated materials were as follows: Plexiglas 8N Crystal Clear (standard PMMA with low co-acrylate content), Plexiglas XT 0A000 (high-molecular standard PMMA with high co-acrylate content), Polycarbonate (PC), Styrene-acrylo...

Kunststoffe international, 2014-06-17, Plastic Optics in Multiple Layers
...he pre- and past-form, as it is common for optical components, a sufficient good bond strength can be assumed [6-9]. For the analysis of the composite strength, molding accuracy and optical performance a polymethyl methacrylate (PMMA, grade: Plexiglas 7N, manufacturer: Evonik Industries AG, Darmstadt, Germany) and a polycarbonate (PC, grade: Makrolon LED2445 HCC; manufacturer: Bayer MaterialScience AG, Leverkusen, Germany) were used. In the experiments, the cavity temperature and the temperature...

Kunststoffe international, 2014-07-22, When Every Second Counts
...rs are flexible, light-weight and robust, the engines reliable and powerful. More than just the pilot’s life often depends on it. What he doesn’t see, even though it’s right in front of his nose, isn’t made of glass. PMMA with the brand name Plexiglas from Evonik Industries AG of Essen, Germany, provides unparalleled safety during rescue missions together with a clear view and UV-protection. Decisive Advantages"Plexiglas is only half as heavy as traditional mineral glass", Gottfried Hornung know...

Kunststoffe international, 2014-10-10, Polymethyl Methacrylate (PMMA)
... Until now, however, conventional melt-processable, impact-modified thermoplastic molding compounds had a decisive drawback: because of their chemical structure, they exhibit a slight, reversible haze at extremely high or low temperatures. With Plexiglas Resist AG 100, however, Evonik Industries AG, Darmstadt, Germany, has now developed a new PMMA molding compound specifically for automotive glazing (Fig. 2). It remains crystal-clear even when exposed to large temperature fluctuations, but is al...

Kunststoffe international, 2014-11-26, Keeping a Clear View
...ions such as ambient lighting and door sill trims. Another area that has long been predicted to hold out great potential is polymer glazing. The premise behind this view is that polymer glazing out-scores glass in a number of ways: panes made from Plexiglas, the highly transparent PMMA from Evonik Industries AG, Darmstadt, Germany, for example, are not only half the weight of equivalent size glass alternatives, but also offer good breakage resistance, very good weather resistance and pleasant ac...

Kunststoffe international, 2014-12-18, Plastics in Architecture
...r their designs, the Wiesbaden architects seek challenges, and prefer to free themselves from standard construction materials. The material selected for the façade panels of this project was the through-colored "Plexiglas Mineral", a special polymethyl methacrylate (PMMA) from Evonik Industrie AG in Darmstadt, Germany.The extremely resistant mineral-based material has a homogeneous, finely satinized surface that is manufactured "ready to install". Time-consuming polishing processes before final ...

Kunststoffe international, 2015-10-12, Lighting with a Future
...epts in motor vehicles is the LED technology. Although LEDs require only small installation depths, they produce a very strong punctiform light that first has to be directed uniformly into the component. It is here that special products such as Plexiglas LED, a light-diffusing, transparent acrylic glass of PMMA with an outstanding light-guiding behavior, come into their own. This allows both crystal clear, structured and light-diffusing parts and components to be produced [5]. Many PC producers ...

Kunststoffe international, 2015-11-23, From Design to Volume Production
...kes up considerably less space and production time than conventional production methods and simplifies the logistics.The material system developed by Evonik comprises two components: the PMMA molding compound supplied in pellet form under the name Plexiglas cf and the liquid two-part reactive system cf 30 for the scratch-resistant coating. The suffix cf denotes PMMA molding materials and reactive systems optimally tailored for this process. The solvent- and siloxane-free reactive coating system ...

Kunststoffe international, 2015-11-23, Three-Dimensional Lighting
...he plates and the potential risk of damaging or contaminating the light guide surface during the process.The aim of Evonik Performance Materials GmbH, Darmstadt, Germany, was therefore to develop a light guide plate made from the PMMA material, Plexiglas, in which the optical functions described above were already integrated (Fig. 2). This was achieved by an in-line lamination process in which the reflective film is firmly bonded to the light guide plate. Adhesion is accomplished by a transparen...

Kunststoffe international, 2016-10-17, Polymethyl Methacrylate (PMMA)
...es. Thus, Evonik’s Performance Materials segment has developed a new special molding compound of its brand PMMA which withstands particularly high loads, for example from stone impact, and is therefore suitable for parts in the lower vehicle area. Plexiglas Hi-Gloss NTA-5 is an improved version of the special Hi-Gloss product series, which have already long been used for non-transparent body parts. It has particularly high impact strength together with good heat deflection temperature and is als...

Kunststoffe international, 2018-02-21, Fast Compression in Multiple Layers
...are completely closed, for injection compression molding the compression frames are opened to a defined compression gap. Multilayer Injection Molding and Injection Compression Molding Process in ComparisonIn practical test series with a PMMA (type: Plexiglas 7N; manufacturer: Evonik Performance Materials GmbH, Darmstadt, Germany), IKV scientists compared the injection molding and injection compression molding process using a three-layered lens (Title figure). The layer thickness ratio between th...

Kunststoffe international, 2018-03-09, Bright Future
...DesignElectric cars are even more dependent than vehicles with combustion engines on lightweighting to save energy. Consequently, lightweight plastics are much in demand by manufacturers. Today, for example, non-transparent pillar covers made from Plexiglas jet-black and high-gloss polymethyl methacrylate (PMMA) molding materials from Evonik Industries AG, Essen, Germany, are being used on many conventional models as an alternative to painted metal pillar covers. But, above all, the electromobil...

Kunststoffe international, 2018-09-19, Plastics for the Mobility of Tomorrow
...and its type, photo-oxidative degradation also takes place, making these materials soluble in water, or at least dispersible and thus easily removable.For some time, Evonik Industries AG, Essen, Germany, has been offering its Plexiglas compounds in inherently scratch resistant form, as well [9]. The lubricants [10] from the company are already firmly fixed in the compound, thereby providing defined surface properties that can resist common loads markedly better. The other property levels of the ...

Kunststoffe international, 2018-11-09, Droplets to the Beat of Milliseconds
...ple, it is even possible to vary the Shore hardness of the part manufactured by changing the aspect ratio (Fig. 4). Accordingly, the mechanical part properties also change (Fig. 5).The example of polished test plates made from PMMA (type: Plexiglas 7N) also shows how a transparency of the parts can be achieved by using special process parameters. In this case, the droplets are extremely densely packed and the test plate was polished after the building process (Fig. 6).Industrial Functional Parts...

Kunststoffe international, 2019-04-25, Gripper Variants According to Customer Requirements
...xtreme is exemplified by very thickly paced drops and the "overfilled" parts that result from it. Taking as examples polycarbonate dice (grade: PC 2805, manufacturer Covestro AG, Leverkusen, Germany) or sample discs made from PMMA (type: Plexiglas 7N, manufacturer: Evonik Performance Materials GmbH, Darmstadt, Germany), transparent parts can be achieved by subsequent polishing. Using the AKF-process and without changing the parameters, the filling level of a TPE part can be specifically altered ...

Kunststoffe international, 2019-07-04, New Illumination of Plastics
... mold temperature, injection volume flow, holding pressure height and duration) has to be developed. Materials Used Typical plastics for optical components used in automotive engineering are polymethyl methacrylate (PMMA) (type: Plexiglas Resist zk5HC, manufacturer: Evonik Industries AG, Marl, Germany), polycarbonate (PC, type: Makrolon 2405, manufacturer: Covestro AG, Leverkusen, Germany), and liquid silicone rubber (LSR, type: Silopren LSR 7060, manufacturer: Momentive Performance Materials Gm...

Kunststoffe international, 2020-05-05, More is Less
...antly being presented with new challenges, and so not only the manufacturing process but also the underlying material, quartz, is in need of alternatives. Back in 1933, Röhm & Haas AG launched a polymethyl methacrylate (PMMA) under the brand name Plexiglas [2]. A good seven years later, in 1940, Heinrich Wöhlk developed a product whose forerunner had first been proposed by René Descartes back in 1636 [3] – the contact lens [4]. A whole series of developments followed, but the example of the cont...