Prism - PUR - Covestro Deutschland AG

Kunststoffe international, Less Granules Stock Means More Quality
...easing its intensity or changing its color. This presupposes a very smooth surface over the entire transmission distance to ensure total internal reflection of the light. The light can thus only escape at particular points, which are equipped with prism-like structures for this purpose. Correspondingly, the injection molding process is required to provide high-precision reproduction of the part surface and high homogeneity and purity of the plastic melt. In general, injection molding offers grea...

Kunststoffe international, 2005-11-21, Market and Trends: Nanomaterials: Opportunities and Risks
... In contrast to conventional and expensive vapour-deposited interference coatings, more economical forming methods such as hot stamping techniques are employed here. Prism structures for antiglare coatings can be created by means of interference lithography. According to Dr. Andreas Gombert of the Freiburg Fraunhofer Institute for Solar Energy System, the combination of moth eye structures with antiglare surfaces is of special interest for flat panel displays. For LEDs, asymmetrically scattering...

Kunststoffe international, 2005-11-21, Mould-making 2000
...rkerod/Denmark - for the production of two- or multi-coloured closures. With this technology, which is particularly well-suited for multi-impression moulds, the reversing plate in the multi-colour mould is divided into rotatable, vertically adjacent prism-shaped strips (Fig. 9). These prisms support the cavities, which normally would be housed together in the reversing plate. Compared to the reversing plate, this system has the advantage, that just a short mould-opening stroke suffices for index...

Kunststoffe international, 2005-11-21, Printing and Finishing Webs
...ing inks, 2 Pump for circulating the ink, 3 Ink bath, 4 Ink application nozzle (picture: Windmöller & Hölscher) Fig. 2. Schematic representation of the Flexorex C ink unit of the Astraflex 1 Compact connection with machine racks, 2 Linear prism lead, 3 Precision spindle (self-inhibiting), 4 Plate cylinder and gravure roller bearings with lids, 5 Servo step motors for the quick adjustment system, 6 Gravure roller, 7 Ink chamber doctor blade, 8 Plate cylinder, 9 Blower for the drying between the ...

Kunststoffe international, 2005-11-21, Radiation-induced Crosslinking: Crosslinked PA6 for Circuit Carriers
Electronics Crosslinked PA6 for Circuit Carriers Radiation-induced Crosslinking. By post-crosslinking with an electron beam, it is possible to prevent engineering thermoplastics such as polyamide 6 from softening or melting. A definite improvement in the stability during soldering is the result. The crosslinking of plastics provides a very effective method for modifying the properties of engineering thermoplastics, particularly with regard to the current lead problem for the production of circui...

Kunststoffe international, 2005-11-21, Tribological Applications: PEEK Compounds in an Aqueous Environment
...mpound also contained graphite. Numerous other tested compounds [11] confirm the results described here but are not detailed in this report. The test materials were injection moulded into Campus test bars. 10mm x 10mm samples were then cut from the prismatic region of the test bars. The sample surfaces were not given any further mechanical treatment but were simply cleaned with alcohol. The surfaces with the resion rich skin were then exposed to slinding wear. This situation most closely corresp...

Kunststoffe international, 2005-12-07, Competition: The Other Chinese
...nal providers. Extend Mold offers 3D mould making and mould-flow analyses. He shows the documentation and drawing of a 4-fold mould, consisting of two prism parts and two reflector housings of rear reflectors for a customer in Detroit/USA that Extend Mold has just delivered. We see transparent rear reflectors, multiple-component parts and other technical components made by Extend dies all over the world, at his small booth. Even as we are talking, an interested person comes along asking about Ex...

Kunststoffe international, 2006-09-05, Hot Runner Solution for Warning Triangle: Caution, Special Requirement
...o be anticipated and it must be designed accordingly. The material is particularly suitable for high-quality optical applications and has a high light transmittance (degree of light transmission: 92%) as well as high surface scratch resistance. The prism side of the reflectors is metallised by the high vacuum process. This serves, on the one hand, to improve reflection and, on the other hand, as a protective measure against water vapour because misted reflectors are dull, i.e. they do not refle...

Kunststoffe international, 2008-01-15, Made in Greater China and Taiwan
...hanical calculations. In Germany SimpaTec GmbH, Aachen, distributes the software and also offers its use as a service. Weneeds Enterprice Co., Ltd., Tainan Hsien, provides 3-D mold making and production of reflector housings and prism parts for headlights and rear lights to the Japanese automobile industry. On the small stand high-gloss technical parts were particularly evident. Frank Lo, General Manager, emphasized that the company was especially proud of these parts because hitherto there had ...

Kunststoffe international, 2008-10-17, Polymethyl Methacrylate (PMMA)
...ntioned. The transparent webs are extruded from a special Plexiglas molding compound with high flow and outstanding accuracy in reproduction of detail. The vertical blinds (Fig. 3), which were produced out of this material, have a 90° prism structure, providing for complete reflection of direct solar irradiation. This way, the solar heat is prevented from entering the room, nevertheless allowing the diffused daylight to get inside. Even if the blinds are closed, the room remains b...

Kunststoffe international, 2014-11-26, Light-Weight, High-Modulus, Wear Resistant
...e audible noise caused by steel/steel. The lower density can run as high as 400 %, compared to metal, thus resulting in a clearly lower mass moment of inertia.The Properties as TestedThe positive sliding wear properties are demonstrated by a ball-on-prism test. A rotating steel ball moves at a sliding speed of 100 mm/s on inlaid test plates made from Terez GT3 300 HG40 TF15 under a load of 30 N. Circular surfaces on the plates were swept over by a circular ring on the ball. Test duration was 50 ...

Kunststoffe international, 2016-10-17, Polycarbonate (PC)
...s with multiple optical functions can be fabricated from the semi-finished products in keeping with current trends. With Makrolon SX Shark for instance, Covestro supplies a transparent solid PC sheet with curved micro-prism optics on one side and a glossy surface on the other. The sheet combines very high light transmission with precise light guidance for glare-free lighting. PC is firmly established in safety applications – especially where high transparency is demanded in addition to breaking ...

Kunststoffe international, 2018-05-15, Power Lies in the Water
...e mold, as an all-surrounding component (Fig. 6). All the components were automatically three-dimensionally meshed from tetrahedral elements, with the part cavity consisting of a boundary layer mesh (BLM).The BLM consists of up to five prism layers at the outer surface of the part and of tetrahedral elements in the interior. These five layers allow the relevant physical parameters, such as shear rate or temperature, to be more accurately registered or better resolved at the wall, the region with...