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Solving friction problems with a thermo plastic
is thought to be an extensive market in the mass produced car field and with its reduced finishing cost the new resin is likely to emulate in Britain the success it has already had in this field in the United States. (70/4/65) Solving friction problems thermo plastic NOUAILLE-DEGORCE, J.
with
a
British Plastics, Vol 43, No 1 pp 71 73 (1970) PTFE offers outstanding chemical resistance and frictional characteristics, which have been enhanced with fillers. This article outlines the use of PTFE. as a filler in an acetal homopolymer matrix and considers the limitations, economics and applications of this new material. (70/4/66)
Now - mass production fibre parts MORTIMER, J.
of
carbon
Hush-hush bearings need no lubrication MORTIMER, J.
The Engineer, p 39 (March 1970) Roller element bearings with carbon fibre cages are being developed at the National Centre for Tribology, Reactor Engineering Labs, UKAEA, Risley, Lancs and if successful will offer the opportunity of self lubrication bearings which do not need to be lubricated with other materials. They are expected to be quieter in service and to find application in the motor, machine tool and consumer goods industries in particular. The work of the Centre on plastic self induced air bearings for high speed purposes concludes the article. (70•4/69)
Carbon fibre can snatch nuclear prize for Britain PETERS, D.
The Engineer, p 7 (January 1970)
The Engineer, p 7 (January 1970)
Rolls Royce have installed a 200t press at their Av o n m o u t h factory to mass produce carbon fibre gas turbine blades. The press is designed to mould and cure carbon fibre components from pre-impregnated sheets but can be used for thermosetting plastics and it is said that its use will make the hand lay up techniques associated with glass fibre obsolete. The machine is capable of varying pressures up to 200 tons and a cycle time that can be varied between three minutes and six hours; its platen is heated by induction to between 70 and 300°C as required but this range will almost certainly be widened as higher temperature resins are involved. (70/4/67)
The success of Britain's participation in the Anglo German Dutch development of the gas centrifuge for enrichment of uranium could depend on the success of carbon fibres used in thousands of rotors and blades instead of titanium and other alloys. If the large rotor needed for such a centrifuge could be made more cheaply than out of titanium Britain might dramatically cut construction costs and an alignment process developed by Mintech which involves chopping carbon fibres into small sections and dispersing the pieces in glycerol could be the key. The glycerol wets the fibres so they can be aligned on a moving paper belt before it is removed and filtered off. (70/4/70)
Automatic presses speed output of fibre blades MORTIMER. J.
The Engineer, p 57 (February 1970) This general article features the presses delivered to Rolls Royce where production facilities to manufacture glass and carbon fibre composite components on a large scale are being set up. The presses have been designed with fully automatic control systems to eliminate the difficulties of operator control of the variables pressure, temperature and time of cure and posture on which the production of strong materials depends. The latter half of the article includes a brief description of the presses and their mode of operation. (70/4/68)
256
COMPOSITES June 1970
an entirely new philosophy in architecture and structural engineering. (70/4/71)
Carbon f i b r e - the new material for industry RAYMOND, J. A.
Has carbon fibre manufacture? SUMNER, J.
a
place
in car
The Engineer, p 42 (February 1970) This review article has as its main theme the unjustified heralding of carbon fibre composites as the panacea of all production troubles and attempts to reassess the situation on a more realistic basis. It seems that despite work going on at the moment carbon fibres cannot yet be used for vehicle body reinforcement and their cost of £500 per lb is such that they are not a viable proposition for the mass produced vehicle. Mention is made of specialist applications such as racing cars and space vehicles where the economics are in a different perspective altogether and the article is concluded by a reference to deformation on impact and to the habit of over designing which could be very expensive with these materials. (70/4/72)
Thermal conductivity of reinforced plastics SUNDSTROM, D. M. and CHEN, S. Y.
Journal of Composite Materials, pp 113 - 117 (January 1970) Thermal conductivities of polystyreneglass and polyethylene-glass systems were measured over a range of glass concentrations and glass sizes. Glass reinforced materials were selected for study because of their large scale commercial exploitation and importance. Experimental thermal conductivity data are compared with values predicted by several theoretical models for heterogeneous systems. (70/4/73)
Reinforced Plastics, Vol 14, No 5, p 132 (January 1970)
Tensile properties of polymer-filler composites WONG, T. T. and SCHENHERN, H.
This review article is divided into sections on the development and properties of carbon fibre and carbon fibre composites, the incorporation of carbon fibres into the matrix and a selection of the successful applications of the material. The last group contains not only present applications such as in turbine blading and in racing car body manufacture but suggestions that the application of carbon fibre composites to structures will result in
Journal of Applied Physics, Vol 40, No 13, p 5 1 3 1 - 5138 (December 1960) A three phase model is proposed for the stress analysis of polymers filled with high surface energy fillers to replace the usual two phase model. Such a model is said to be required since it is known that a transcrystalline region which differs mechanically from the bulk polymer is generated at
with
a
British Plastics, Vol 43, No 1 pp 71 73 (1970) PTFE offers outstanding chemical resistance and frictional characteristics, which have been enhanced with fillers. This article outlines the use of PTFE. as a filler in an acetal homopolymer matrix and considers the limitations, economics and applications of this new material. (70/4/66)
Now - mass production fibre parts MORTIMER, J.
of
carbon
Hush-hush bearings need no lubrication MORTIMER, J.
The Engineer, p 39 (March 1970) Roller element bearings with carbon fibre cages are being developed at the National Centre for Tribology, Reactor Engineering Labs, UKAEA, Risley, Lancs and if successful will offer the opportunity of self lubrication bearings which do not need to be lubricated with other materials. They are expected to be quieter in service and to find application in the motor, machine tool and consumer goods industries in particular. The work of the Centre on plastic self induced air bearings for high speed purposes concludes the article. (70•4/69)
Carbon fibre can snatch nuclear prize for Britain PETERS, D.
The Engineer, p 7 (January 1970)
The Engineer, p 7 (January 1970)
Rolls Royce have installed a 200t press at their Av o n m o u t h factory to mass produce carbon fibre gas turbine blades. The press is designed to mould and cure carbon fibre components from pre-impregnated sheets but can be used for thermosetting plastics and it is said that its use will make the hand lay up techniques associated with glass fibre obsolete. The machine is capable of varying pressures up to 200 tons and a cycle time that can be varied between three minutes and six hours; its platen is heated by induction to between 70 and 300°C as required but this range will almost certainly be widened as higher temperature resins are involved. (70/4/67)
The success of Britain's participation in the Anglo German Dutch development of the gas centrifuge for enrichment of uranium could depend on the success of carbon fibres used in thousands of rotors and blades instead of titanium and other alloys. If the large rotor needed for such a centrifuge could be made more cheaply than out of titanium Britain might dramatically cut construction costs and an alignment process developed by Mintech which involves chopping carbon fibres into small sections and dispersing the pieces in glycerol could be the key. The glycerol wets the fibres so they can be aligned on a moving paper belt before it is removed and filtered off. (70/4/70)
Automatic presses speed output of fibre blades MORTIMER. J.
The Engineer, p 57 (February 1970) This general article features the presses delivered to Rolls Royce where production facilities to manufacture glass and carbon fibre composite components on a large scale are being set up. The presses have been designed with fully automatic control systems to eliminate the difficulties of operator control of the variables pressure, temperature and time of cure and posture on which the production of strong materials depends. The latter half of the article includes a brief description of the presses and their mode of operation. (70/4/68)
256
COMPOSITES June 1970
an entirely new philosophy in architecture and structural engineering. (70/4/71)
Carbon f i b r e - the new material for industry RAYMOND, J. A.
Has carbon fibre manufacture? SUMNER, J.
a
place
in car
The Engineer, p 42 (February 1970) This review article has as its main theme the unjustified heralding of carbon fibre composites as the panacea of all production troubles and attempts to reassess the situation on a more realistic basis. It seems that despite work going on at the moment carbon fibres cannot yet be used for vehicle body reinforcement and their cost of £500 per lb is such that they are not a viable proposition for the mass produced vehicle. Mention is made of specialist applications such as racing cars and space vehicles where the economics are in a different perspective altogether and the article is concluded by a reference to deformation on impact and to the habit of over designing which could be very expensive with these materials. (70/4/72)
Thermal conductivity of reinforced plastics SUNDSTROM, D. M. and CHEN, S. Y.
Journal of Composite Materials, pp 113 - 117 (January 1970) Thermal conductivities of polystyreneglass and polyethylene-glass systems were measured over a range of glass concentrations and glass sizes. Glass reinforced materials were selected for study because of their large scale commercial exploitation and importance. Experimental thermal conductivity data are compared with values predicted by several theoretical models for heterogeneous systems. (70/4/73)
Reinforced Plastics, Vol 14, No 5, p 132 (January 1970)
Tensile properties of polymer-filler composites WONG, T. T. and SCHENHERN, H.
This review article is divided into sections on the development and properties of carbon fibre and carbon fibre composites, the incorporation of carbon fibres into the matrix and a selection of the successful applications of the material. The last group contains not only present applications such as in turbine blading and in racing car body manufacture but suggestions that the application of carbon fibre composites to structures will result in
Journal of Applied Physics, Vol 40, No 13, p 5 1 3 1 - 5138 (December 1960) A three phase model is proposed for the stress analysis of polymers filled with high surface energy fillers to replace the usual two phase model. Such a model is said to be required since it is known that a transcrystalline region which differs mechanically from the bulk polymer is generated at