Polymers in Sport and Leisure

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References and Abstracts equipment for the management of various ailments. Some of the devices are successfully used in the treatment of serious chronic diseases. The most sophisticated and important implementation area of rubber inflatables is life saving and safety equipment technology, used by the Indian Defence forces for army, navy and airforce operations. A few of the selected items made from all rubber sheeting/rubberised textile using natural or synthetic substrates effectively instrumental in social service sector by way of medical aid and for defence operational requirement are described. INDIA Accession no.789890 Item 27 Plastics News(USA) 12,No.32, 9th Oct. 2000, p.10 RACETRACK TESTS FOAM TO CUSHION CRASHES Pryweller J Cellofoam North America Inc. has provided Lowe’s Motor Speedway in Concorde, N.C., with a crash barrier system for its racetrack. The system comprises expanded foam blocks with an outer shell of polystyrene. The outer wrapping prevents the expanded polystyrene from exploding on impact. Tests are currently being conducted at the racetrack involving the dropping of a 5000 pound Cadillac on to the foam blocks. The barrier system will prevent serious or fatal injury to the stock car drivers. NASCAR; LOWE’S MOTOR SPEEDWAY; CELLOFOAM NORTH AMERICA INC. USA Accession no.789001 Item 28 European Plastics News 27, No.9, Oct.2000, p.37 DYNAMIC DESIGN Reade L DuPont’s Imagineering competition challenges young designers across Europe to make innovative use of plastic materials. The theme for this year’s event was “Personal Safety and Care” and included sport and leisure applications. The winning entry in the UK arm of the competition is a modified snowboard, which makes it easier for the rider to change position on the board. A sliding unit, a so-called dynamic binding system, was devised to fit between the board and the binding. A toggle clamp fixes the binding into place. The part was designed in Zytel, a toughened, glass-reinforced nylon 66. Other entrants in the competition included a toboggan, flippers, a penknife/emergency tool and a rucksack with retractable feet that transforms it into a seat. DUPONT CO. EUROPEAN COMMUNITY; EUROPEAN UNION; UK; WESTERN EUROPE Accession no.788051 Item 29 Asian Plastics News July/Aug.2000, p.15 GAS-ASSIST TO THE FORE A new golf-cart roof is one of the largest parts ever to be produced by gas-assisted injection moulding. This article takes a close look at its development and production, and the benefits of producing this part in this way. CINPRES; CLUB CAR; THOMSON PLASTICS; MONTELL; MOLDFLOW; MILACRON EUROPEAN COMMUNITY; EUROPEAN UNION; UK; USA; WESTERN EUROPE Accession no.787902 Item 30 Plastics News(USA) 12, No.21, 24th July 2000, p.4 COMPOSITE BIKES BECOMING TOUR DE FORCE Miel R As US bicycle racer Lance Armstrong closed in on his second Tour de France victory, the company that makes his composite-frame bicycle, Trek Bicycle Corp. of Wisconsin, forecast a huge increase in its composite bike sales. This article discusses the use of composites in racing bikes and looks at some of the company’s range. TREK BICYCLE CORP.; LOOK CYCLE INTERNATIONAL; HEXCEL; CANNONDALE CORP.; KESTREL BICYCLE CORP. EUROPEAN COMMUNITY; EUROPEAN UNION; FRANCE; USA; WESTERN EUROPE Accession no.786550 Item 31 Plastics News(USA) 12, No.27, 4th Sept.2000, p.1/17 CHAIRMAN OF THE BOARD Renstrom R Clark Foam in Southern California manufactures the most rigid PU foam surfboard blanks in the world. The company combines polyester-type polyol and isocyanate in a reactor vessel. Technicians hand-pour a selected PU formulation into a concrete mould with a mould release agent. The mixed chemicals react to form PU and carbon dioxide gas bubbles that expand and create the foam. The process produces a semi-finished blank of uniformly white foam that retains its clean look. Clark Foam sells standard densities in various sizes and thicknesses. The company has not raised its prices in six years. Alternative methods of producing surfboards are outlined. CLARK FOAM USA Accession no.785056 Item 32 Macplas International 26 © Copyright 2001 Rapra Technology Limited
References and Abstracts No.9, Aug.2000, p.88 SNOW SCOOTER A snowscooter, manufactured by Bombardier-Nordtrac of Finland is equipped with hoods made of Bayflex 110 glass fibre reinforced polyurethane from Bayer. The suitability of the material for this particular application is briefly described, and centres on its low temperature properties and high impact strength. In addition, the part can be manufactured by the RIM process, which gives significant economic advantages. BOMBARDIER-NORDTRAC; BAYER AG EUROPEAN UNION; FINLAND; SCANDINAVIA; WESTERN EUROPE Accession no.784642 Item 33 Macplas International No.9, Aug.2000, p.82-3 COATINGS AND ADHESIVES Suprasec 2386 has been developed by Huntsman Polyurethanes as part of its MDI-based binders range. The product is suitable for use in a variety of applications from electronics and telecommunications to food packaging and sports. As a coating for the electronics and telecommunications industries, Suprasec 2386 has been formulated to provide a new modified pure MDI as a direct replacement for pure MDI in wire coating applications. Its advantages in this application, food packaging adhesives, spray coating for concrete and anti-corrosion coatings, sports surfaces, and one-component, solvent free laminated panel adhesive for applications in cold rooms, warehouses, and computer isolation rooms, are described, with particular reference to storage stability and low temperature properties. HUNTSMAN POLYURETHANES USA Accession no.784635 Item 34 Kunststoffe Plast Europe 90, No.5, May 2000, p.21-2; p.76-7 English; German THREE WEEKS UNTIL THE START Hell M Creaholic SA Victory in the race through the Australian bush was the finale to the extraordinary development of a solar-powered electric bike. Less than three weeks were available for the production of the key parts of the bike. With the aid of stereolithography, however, the challenge was successfully met. Details are given. SWITZERLAND; WESTERN EUROPE Accession no.784143 Item 35 Materials World 8, No.6, June 2000, p.11-3 GOOD VIBRATIONS - MATERIAL SWING INTO ACTION Jenkins M Materials technology has played a vital, lately controversial role in the history of tennis, especially during the modern era with the advent of powerful composite rackets. For the average player, modern rackets offer a range of benefits, such as oversized sweat spots and efficient vibration damping, that make the game hugely more attractive. In fact, new technology could lead to the effective elimination of vibration. In the 1970s aluminium frames offering increased stiffness and reduced mass enjoyed a brief period of success However, towards the end of the decade new continuous fibre composites were introduced that rapidly superseded aluminium as a frame material. The first of these composite materials consisted of glass fibres held within a polyester resin matrix, and later rackets went on to encompass various grades of carbon fibres within epoxy resin matrices. The latest developments are reviewed. 3 refs. EUROPEAN COMMUNITY; EUROPEAN UNION; UK; WESTERN EUROPE; WORLD Accession no.784125 Item 36 Journal of Reinforced Plastics & Composites 19, No.11, 2000, p.848-62 DAMPING OF MOISTURE-ABSORBED COMPOSITE RACKETS Chou P J C; Ding D; Chen W-H Feng Chia,University; Taiwan,Industrial Technology Research Institute The influence of moisture absorption on damping of tennis rackets is characterised. Three thermoset and one thermoplastic matrix composites are used for the rackets. The first is a carbon/epoxy system, and the second is similar except that the epoxy is a PU-modified type. The third is an interleaved composite that adds nylon 6 non-woven fabrics in between the carbon/epoxy plies. The last is a thermoplastic composite made from commingled yarns that mix carbon and nylon 6 filaments. Based on these materials, four prototypes of tennis rackets with identical shape are fabricated. Two environments representing extreme hygroscopic conditions are applied to the rackets. One is a dried condition that forces the rackets to expel moisture, the other is a wetted condition that allows the rackets to be fully saturated. Under these conditions the vibration tests are conducted by using the impulse method. The time-response of the rackets excited by a hammer is acquired, and the corresponding frequency response function is calculated in real time. The resonant frequency and the damping ratio are measured for each racket under the dried and wetted conditions. How the vibration behaviour depends on the material systems and how the rackets respond to the hygroscopic conditions are discussed. 10 refs. TAIWAN Accession no.784041 © Copyright 2001Rapra Technology Limited 27
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