Grivory - PA6I/6T, PPA - EMS-CHEMIE

Plastics Technology, 2005-05-05, New High-Performance Nylons For Automotive, Electronics, Packaging
Nylon producer Ems-Grivory America in Sumter, S.C., is reaching beyond its traditional product range to bring out new partially aromatic nylons that bridge the gap between standard engineering thermop...

Kunststoffe international, The Potential of Redesign and Part Consolidation
...of processes from conventional and additive manufacturing. The part that is manufactured here is a spacer (Fig. 2) of a high temperature resistant, glass fiber-reinforced “triple-six polyamide” (PA6T/66, type: Grivory HT2V-3H, manufacturer: Ems-Chemie AG, Domat/Ems, Switzerland). The aim of the project performed with this material is to examine what advantages can be achieved with AM parts, and how much influence additive manufacturing has on the cycle time, and therefore on the costs of the inj...

Kunststoffe international, 2005-11-21, Air Ducts under the Bonnet
...ffectively than before with this material. In addition, a new bellows concept permits replacement of rubber parts by plastic. Easy processing and cost reduction are only two of the plus points that have made Grilon ELX flexible polyamides from Ems-Grivory AG, Switzerland (formerly Ems Chemie) the first-choice material for under-bonnet air duct parts in motor vehicles. In future, the zone between the air filter and turbocharger - or in conventional petrol engines between the air filter and engi...

Kunststoffe international, 2005-11-21, Engineering Plastics: Products for Innovative Processes
...switch and relay housings (Fig.2). The two PA66 variants Durethan DP 2801 (unreinforced) and DP 2802/30 (30% glass-fibre-reinforced) meet the tightened-up household appliances standard IEC 60335-1. The Grilon ELX products specially developed by Ems-Grivory for sequential blow moulding, in combination with the Moax bellows design patented by Ems, are opening up completely new air ducting applications in the engine compartment. For the first time, flexible, pressure-stressed air ducting can also b...

Kunststoffe international, 2005-11-21, Filter Cups Made from Polyamide: Transparency for Water Filters
...(DVGW) and complies with the European recommendations for use in contact with drinking water published by the Federal Institute for Risk Assessment (Bundesinstitut für Risikobewertung, formerly known as the BgVV). For some time now, Ems Grivory has adopted the philosophy that the properties of all plastics supplied for the fluid handling and drinking water sector should meet the requirements of international directives. Besides filter cups, this polyamide 12 is processed into flow meters of all...

Kunststoffe international, 2005-11-21, High-Performance Polyamides
...s representative of this enhanced performance. The materials involved were a partly aromatic copolyamide and an amorphous, aromatic, cycloaliphatic, transparent homopolyamide. Partly Aromatic with Demanding Properties Copolyamide PA 6T/6I (grade: Grivory HTV, manufacturer: Ems-Chemie, Domat/Ems/Switzerland) is synthesised from diamines and aromatic dicarboxylic acids, a combination of terephthalic acid (TPS) and isophthalic acid (IPS). Because terephthalic acid is the predominant reagent, ISO ...

Kunststoffe international, 2005-11-21, High-temperature Polyamides: Lead-free Soldering
...e, will have to be increased by about 30°C to 260°C. Many of the materials previously used in industrial-scale manufacture no longer satisfy requirements and must be replaced. Regulation-compliant Material Solutions For these applications, Ems-Grivory, Domat/Ems, Switzerland has developed thermoplastic materials based on polyphthalamide (PPA) that enable users to manufacture regulation-compliant products. The new PPA, marketed under the trade name Grivory HT XE 3876, is flame-retardant and fre...

Kunststoffe international, 2005-11-21, Materials with Multiple Functions
...temperatures up to 280°C for short times because of new procedures like the surface mounting technique and due to relinquishment of lead in the tin solder. No degassing or deformation is permissible here. EMS Grivory provides a partially aromatic co-polyamide (PPA; GrivoryHT) for such applications. It has very good thermal stability, dimensional stability and strength and is characterised by low moisture absorption and good chemical resistance. Besides that the mechanical characteristics hardly ...

Kunststoffe international, 2005-11-21, Non-elongating Corrugated Pipe: Flexural Elasticity plus Longitudinal Rigidity
...e or motor, as a result of which they may become damaged or heat up excessively. It also happens that such uncontrolled movements cause noises in the vehicle and impair drive comfort. A variant of the corrugated geometry developed by the company Ems-Grivory eliminates these disadvantages of conventional corrugated pipes by restricting the flexural elasticity to a level determined by the designer so as to comply with the requirements of the particular application. This design bears the name Moax....

Kunststoffe international, 2005-11-21, Pipe Design: Optimised Static Design – Fast Cycles
...cycles. They also have an adverse effect on the profitability of the injection moulding process. In such regions, there is also the risk of void formation and sink marks. From Circular to Oval In the application development department of Ems-Grivory, an alternative design was developed for pipe inlets with the aim of reducing stress in the mostly highly stressed areas described above. In this solution, the circular cross section of the pipe-connecting stub in the direction of the pipe inlet is...

Kunststoffe international, 2006-08-06, High-performance Polyamides: Transparency for all Occasions
... in shorter cycle times, and therefore an appreciable increase in productivity. At the same time, the final product has a lower weight and much better transparency than PSU. Where manufacturers intend to replace an existing material, Ems_Grivory can help with technical support, such as rheological part design, FE analysis or mould optimisation, to achieve a rapid and technically successful transition. The optical characteristics of the new polyamides are better than those of HT polycarbonate and...

Kunststoffe international, 2006-10-30, Blow Moulding: Reliable Also at High Temperatures
...(70mm/24D) screw, accumulator head and suction device. A touchscreen display allows the operator to monitor and control the process via “Quality Control“ and “SPC“. Tested materials: Polyamide 6 (PA 6). Grilon EB 50 H (Supplier: EMS-Grivory): high-viscosity, unreinforced, heat-stabilised PA 6 with high melt strength. It is characterised by high impact strength even at low temperatures and is suited to conventional and 3-D blow moulding. Items produced include ducts for turbochargers, air man...

Kunststoffe international, 2007-03-15, Safely Welded All Round
...production of an auxiliary water pump for a car heater circuit, where the housing and one of the housing covers (see title picture below) have to be joined. The material used is a polyphthalamide (PPA) with a glass fibre content of 40% (grade: Grivory HTV-4H1; manufacturer: EMS-Chemie AG, Domat/Ems, Switzerland). The auxiliary water pump is electrically powered and, besides pumping the hot water to heat up the passenger compartment, is also used to regulate engine temperature when the vehicle is...

Kunststoffe international, 2007-08-14, To the Limits of the Possible
...ile. This includes, for example, good chemical resistance, very good dimensional stability and low warpage. Components made from these polyamides can be produced efficiently and at low cost and have a good surface finish. PPA-based materials such as Grivory HT are excellent for challenging applications because of their special property profile, which crosses over into the performance range of high-performance plastics such as PPS or PEEK. In terms of the important characteristic data for metal r...

Kunststoffe international, 2008-02-17, Stiff, Tough and Resistant
...de 12 has a good track record of over 30 years in challenging applications [1, 2]. The desirable feature is its very high chemical and hydrolysis resistance compared to other polyamides and engineering plastics. The conventional PA12 grades from Ems-Grivory, Domat/Ems, Switzerland, have the lowest moisture absorption of all commercially available polyamides, and also offer outstanding dimensional stability and very good aging behavior in weathering and heat. In addition, it offers outstanding me...

Kunststoffe international, 2008-06-16, The Power of Long Fibers
...he enterprise states that this type of metal-plastic joint can resist tensile forces up to a maximum of 2,950kg. Pultrusion for Long Fibers The thread did not fail under this high load, and the reason for this was the employed plastic material. Grivory GVL-5H (manufacturer: EMS-Grivory) is a polymer material of extraordinary stiffness and rigidity, which is successfully used as a substitute for diecast metals. These material types' secret of success is their long reinforcing glass fibers. ...

Kunststoffe international, 2008-08-14, The Next Generation of Polyphthalamide
The polyphthalamide Grivory HT is characterized by high rigidity and strength at temperatures up to 150°C. It is very resistant to chemicals and exhibits minimal change in physical properties after moisture uptake. Grivory HT3 is an even more advanced PPA whose moisture uptake has been minimized. This is important in the electrical and electronic fields when components undergo lead-free reflow soldering and functional parts must have extremely good dimensional stability (Title photo). In...

Kunststoffe international, 2008-10-17, Polyamides (PA)
...tions for such HT polymers include intake manifolds with integrated oil separator, turbocharger resonators, ball bearing cages, self-adjusting coupling rings and stiff mechanical torsion dampers. The semi-aromatic polyamides, e.g. Amodel, Zytel HTN, Grivory HT and Ultramid T, with elevated melting points and reduced water absorption are being applied in high-temperature loaded parts, both in automobiles as well as in the electro-/electronics industry. One example of this is a tank pressure senso...

Kunststoffe international, 2008-11-20, Development Continues
...for the second generation (Title photo, right). In this project, it was possible to incorporate the laser welding process even further. The material used is a polyphthalamide (PPA) with a glass fiber content of 40 % (grade: Grivory HTV-4H, manufacturer: EMS-Grivory, Domat, Switzerland). While in the first generation only the pump body and cover were welded together by means of a laser beam (Title photo, left), the threaded fittings used to attach the pump head to ...

Kunststoffe international, 2009-11-19, Hot-Embossed MID Modules for Enhanced Thermal Requirements
...ermomechanical stress in the soldering point. The reason why, contrary to expectations, failures were recorded in the smallest design, even though there were none in the medium design, will be described later with the aid of the simulation. Grivory XE 3844, a polyamide PA6T/6I from Ems-Chemie, Domat/Ems, Switzerland, generally leads to better results, as is the case for condensation soldering, which places much less thermal stress on the plastics. Studies of the influence exerted by the substrat...

Kunststoffe international, 2009-11-19, Injection Molding in a Vacuum
...lticomponent injection molding. An example of the improvement of the roughness of the parts (26 %) was documented by the Lüdenscheid Plastics Institute. Tests at Barlog plastics GmbH, Engelskirchen, Germany, with the material polyphthalamide (PPA) Grivory HTV-5H1 black (manufacturer: EMS-Chemie AG, Domat, Switzerland) showed an increase of 20 % in tensile strength, 10 % increased elongation at break and 15 % in Young’s modulus. The injection pressure fell by 15 % and the deposits in the mold wer...

Kunststoffe international, 2010-01-27, Losing only Half the Heat
...er hand, these materials tend to show little resistance to stress cracking and have low flexural fatigue strength. Combination of these properties is however, not doomed to fail. It is made possible by the product family Grilamid TR from Ems-Grivory, Domat, Ems, Switzerland, which provides a wide assortment ranging from flexible to rigid materials and enables practically indestructible plastic applications to be achieved satisfying the highest requirements. For example the polyamide Grilamid TR ...

Kunststoffe international, 2010-08-19, Vital Contacts
...se in cold and warm water (Fig. 2). Once the water has left the tap it counts as food. Plastics that come into contact with water after it has come out of the tap require a food contact approval rather than potable water approval. Materials from Ems-Grivory, Domat/Ems, Switzerland, that carry the abbreviation FWA (food and water approvals) in their name meet the requirements for potable water and food contact. Communal Potable Water Distribution Networks 50 year guarantees on pipe connectors and...

Kunststoffe international, 2010-09-24, Bonding Required
...sible to make a significant contribution to weight reduction of directly screwed plastic components. As another weight optimization step, Ejot presents plastic connection elements and screws. The screws of the engineering thermoplastic Grivory HTV-5H1, with 50 % glass fibers, provide the same reliability as metal screws but with greater potential for weight reduction. A plastic screw is up to 85 % lighter than a steel one of comparable dimensions. Further weight savings can be achieved by using ...

Kunststoffe international, 2010-09-24, Higher Performance with a Lower Weight
Ems-Grivory, Domat/Ems, Switzerland, is expanding its range of long glass fiber-reinforced polyamides, which are already established on the market, by newly-developed long carbon fiber-reinforced (C-LFT) high-performance polyamides based on Grivory GV and Grilamid L. With these new material types, the values for strength and stiffness are clearly higher than those for conventional carbon fiber-reinforced polyamides: the stiffness is increased by almost 60 %, leading to unusual metallike properti...

Kunststoffe international, 2010-11-25, From Cold to Hot
...nd resistant to vacuum pressure. On the other hand, the position in which the tube is installed demands high flexibility at low temperatures. Until recently, this balancing act could only be achieved up to 160°C. Extended Performance Spectrum Ems-Grivory, based at Domat, Ems, Switzerland, has turned its attention to the temperature resistance spectrum required and developed new polyamide products marketed under the trade name Grilamid 2S. Both the high-temperature properties and low-temperature ...

Kunststoffe international, 2011-08-24, High Transparency for Challenging Applications
...d copolyamides. The properties of the polyamide materials can be controlled and adjusted for a particular purpose by varying the nature and ratio of the diamines, dicarboxylic acids or amino-carboxylic acids used. Transparent polyamides from Ems-Grivory, Domat/Ems, Switzerland, are sold under the trade name Grilamid TR. They are melt processable amorphous polyamides based on an aliphatic, cycloaliphatic or semi-aromatic backbone. Grilamid TR belongs to the class of amorphous homo and copolyamide...

Kunststoffe international, 2011-09-23, Making Connections
...d. Where even greater weight saving is needed, various sizes of the Delta PT can also be made of aluminum instead of steel. Now, an additional, weight-saving variant is available – the Delta PT P (Fig. 3). This screw is made of the thermoplastic Grivory HTV-5H1 (PPA) with 50 % glass fibers. Compared to a metal screw, this variant is claimed to offer the same connection reliability but with a much better lightweight construction potential. A Delta PT P is thus up to 85 % more lightweight than its...

Kunststoffe international, 2011-10-17, Polyamides (PA)
...g the good processing properties of PA66. Focusing on similar applications, more products have been made available, for instance Zytel Plus 95G35 from the Zytel Plus series by DuPont, or Stanyl Dabolo OCD2100 by DSM. As part of its Grivory series, Ems- Chemie Holding AG, situated in Domat/Ems, Switzerland, also offers heat-resistant variants. In the spring of 2011, Radici Group SpA in Gandino, Italy, also announced a PA66 variant of the Radilon series, with low heat ageing. These materials are p...

Kunststoffe international, 2012-06-25, To Bond or Not to Bond
...in Abtenau, Austria, from skin-compatible high-tech polyamides (grade: Trogamid, Grilamid; manufacturer: Evonik, Ems-Grivory). The titanium hinge on the temple joint of the first generation of Lensbond lenses has now been replaced by polyamide as well. The properties of the materials employed meet the unique needs with pinpoint accuracy, i.e. the material for the nose pad is flexible whereas that for the temple is stiff. The path to property-optimized parts lacking a visible gate mark was fraugh...

Kunststoffe international, 2012-08-22, More Cost-Effective Than Metal
High-performance polyamides are increasingly being used as substitutes for conventional die- metals and enabling savings in cost and weight to be achieved. These objectives are also fulfilled by the Ems-Grivory polyamides from Ems-Chemie AG, Domat/Ems, Switzerland. They are employed wherever there is a need on the one hand to reduce the production costs, and on the other hand also to increase the performance of the finished products. Such materials are in demand particularly in the fields of aut...

Kunststoffe international, 2012-11-26, Unimagined Possibilities
Even unreinforced high-performance polyamides are employed in vehicles for such applications where other plastic materials reach their limits. To meet such high demands, Ems Chemie AG in Domat/Ems, Switzerland, developed the new Grivory HT3 polyamide. It is used, for instance, in the steering column bearing housing sleeves of the BMW 5 and 7 series models: This component is exposed to radiation heat from the engine and must withstand temperatures up to 130°C. In this application, the focus is on...

Kunststoffe international, 2013-05-16, Fluid Product Design
...r to simplify final assembly of the module and to reduce the production costs, attachments are molded onto the lawn mower handlebar component. Process engineering highlight of the water injection: The material (grade: EMS Grivory 3258 GF50) from the inside of the handlebar is not displaced into an overflow in the conventional manner and then recycled – by analogy with the production of the wheelbarrow; in the melt pushback process the material is pushed back directly into the space in front of t...

Kunststoffe international, 2013-05-16, No Yellowing, No Fracture
...onditions in professional service over long periods. Uniquely, the cylinder of the new cartridge press from AEG Milwaukee Elektrowerkzeuge GmbH, Hilden, Germany, has been produced from Grilamid TR, a transparent high-performance polyamide from Ems-Grivory, Ems-Chemie AG, Domat-Ems, Switzerland. Thereby, problems with stress cracking, cylinders yellowed by sun exposure, or broken cylinders are a thing of the past. Inexpensive as Endless Tubes Another advantage of Grilamid TR is the result of its ...

Kunststoffe international, 2013-06-19, Quality from the Depth of the Mold
...self A similar series of tests was performed at Ensinger GmbH in Rottenburg am Neckar, Germany. The tests were performed on a cylindrical housing for clutch slave cylinders (Fig. 3) produced from a HAT-PPA filled with 50 % glass fibers (grade: Grivory HTV-5H1 black 9205; manufacturer: EMS-Chemie AG, Domat/Ems, Switzerland). To consistently meet the high requirements on the burst strength, surface roughness, dimensional constancy and absence of flash, the quality fluctuations of the plastic melt ...

Kunststoffe international, 2013-08-19, Lightweight with Long Fibers
...n be seen in the left of the picture; this ensures anatomically correct rolling of the knee joint Fig. 7. Carbon-fiber skeleton in a test part THE AUTHOR HORST HECKEL, born in 1956, is product manager for Long-Fiber Products at Ems-Grivory/Ems-Chemie (Deutschland) GmbH, Groß-Umstadt; horst.heckel@de.emsgrivory.com

Kunststoffe international, 2014-03-21, Drying: Searching for the Perfect Dew Point
...pressure is specified as several times the operating pressure. Hillers produces about 4,500 of these components daily on two injection molding machines. The material processed is a semi-aromatic polyamide (PPA) with 50 % glass fiber content from Ems-Grivory. The material is supplied vacuum-packed in octabins. “The molds were built, sampling completed successfully – volume production could begin”, recalls Erich Klinkhammer, production manager, “but production had hardly started when we encountere...

Kunststoffe international, 2014-03-21, Novel Material Concepts: Sustainability and Design
...onent part. These benefits, combined with ease of processing and good flow characteristics as well as coloring ability, were ultimately decisive. For especially challenging projects, Ems-Grivory has a high-end solution in the form of Grilamid TRVX ready and waiting. This polyamide offers minimal warpage and flash with even fewer sink marks. Conclusion In terms of automotive innovations, the K 2013 confirmed that mobility in the future will be achieved only with plastics. “Plastics and plastics-b...

Kunststoffe international, 2014-08-19, Further Increases in Heat Resistance
... °C and peak temperatures of up to 270 °C are expected. These operating temperatures significantly exceed the performance range of aliphatic polyamides, and even conventional high-​performance materials reach their limits. With the product line Grivory HT High Heat, consisting of the injection molding grades HT2VS-3HH (30 % reinforcement) and HT2VS-45HH (45 % reinforcement), Ems-Grivory, Domat-Ems, Switzerland, offers new possibilities for future air guide systems in automotive engineering.Layer...

Kunststoffe international, 2014-10-10, Polyamides (PA)
..., in a dry and conditioned state. Despite its high glass fiber content of 60 % it is also suited for applications in visible furniture parts, for example. Flat faces made of this product are smooth enough, requiring no further treatment. Ems-Grivory, the company sector at Ems-Chemie concerned with high-performance polyamides, developed and improved their long glass fiber polyamides: With their Grivory GVL-6H HP, the company claims to have achieved an unprecedented value of 300 MPa ultimate ten...

Kunststoffe international, 2015-02-28, Bio-Based and Flame-Retardant?
...lso proven to be 100 % carbon neutral from cradle-to-gate. One halogen-free grade reaches UL94 V-0 classification and is promoted for E&E applications [12]. In addition, under the general term GreenLine, Ems-Grivory, the division for technical plastics of Ems-Chemie AG, Domat-Ems, Switzerland, markets a wide range of bio-based polyamides, which are partially or wholly manufactured from renewable raw materials [13]. GreenLine includes two halogen-free flame-retardant grades of a bio-based PPA tha...

Kunststoffe international, 2015-08-17, Ideal for the Engine
...mented in air-management systems over the years. Consider the turbo outlet connector (Title figure) supplied by Mann+Hummel, Ludwigsburg, Germany, an automotive subcontractor. This consists of Grilon TSG-35/4 W2, a polyamide (PA66 + PA6) made by Ems-Grivory, the High-Performance Polymers business unit of Ems-Group, Domat/Ems, Switzerland, and is capable of withstanding continuous service temperatures of 190 °C and peak temperatures of 220 °C. This tried-and-true triple-six polyamide has replaced...

Kunststoffe international, 2015-09-18, Battery Mount in a Hybrid Design
...rk of assembly dimensioning.The simulations carried out were based on comprehensive experimental testing used to determine the key values required for the materials selected. To give an example, both glass fiber reinforced LFT based on PA6/66 (type: Grivory GVL-5H, manufacturer: EMS-Chemie AG, Dormat, Switzerland) and consolidated glass fiber/PA6 hybrid yarn mesh (type: EC 300 - PA29, manufacturer: P-D Glasseiden GmbH, Oschatz, Germany) were subjected to quasi-static testing at different tempera...

Kunststoffe international, 2016-09-23, Increasingly Complex Innovations
...ge encountered in auto interiors throughout the lifecycle of the vehicle. At the same time, dynamic strength (crash stress), aging resistance, and processability had to be ensured while remaining within the specified cost frame.Project partner EMS Grivory, Domat/Ems, Switzerland, (Fig. 2) was responsible for developing the material. The narrow processing window of the aromatic polyamides required and the complex component structure with many weld lines demanded precise matching of the mold, hot ...

Kunststoffe international, 2017-02-23, All Elements at a Glance
...wn know-how.As current examples, Arburg demonstrated the processing of the high-temperature material polyetherimide (PEI; type: Ultem 9085; manufacturer: Sabic), a medical polylactide and a bio-polyamide (Grilamid BTR 600; manufacturer: EMS-Grivory). The Freeformer is supplied as a holistic system, with Arburg making heavy demands on the quality of the process control. In the last year, the system, which processes standard pellet stock, has undergone significant innovations, such as optimized no...

Kunststoffe international, 2017-08-21, High Performance without High Weight
...w density, significantly less than 1 g/cm3,high impact resistance, also at low temperatures,good flexural fatigue strength and colorability,weather and UV-resistant,low moisture absorption.A comparison of Grilamid materials (manufacturer: Ems-Grivory, Domat/Ems, Switzerland) with low density and the very "light" standard product Grilamid L 20A HL NZ shows the properties of the unreinforced material (Table 1).Low Weight for Winter SportsOne application example for low-density polyamides is winte...

Kunststoffe international, 2018-08-14, Transparent and Safe
Grilamid TR 50 is the latest addition to Ems-Grivory’s amorphous polyamide product range. The new material combines properties such as high stiffness, optical quality, and chemical resistance with high ductility and toughness. The development of transparent polyamides by Ems-Grivory started in the 1980s. The first commercialized product, Grilamid TR 55, paved the way for acceptance of amorphous polyamides in numerous applications, such as baby feeding bottles and fuel sight glasses. A crucial f...

Kunststoffe international, 2020-08-11, Glossy Components without Painting
...shrink during cooling, leaving sink marks or rough areas on the surface due to exposed glass fibers. Injection-molding parts with a complex design, therefore, often need to be painted in an elaborate post-treatment process to cover critical areas. Grivory G7V, available from EMS-Grivory, Domat/Ems, Switzerland, since 2020, combines properties such as high stiffness and strength even after moisture uptake, as well as the chemical resistance of a Grivory GV, with the high surface quality of a poly...