- Email: [email protected]
ICI pilot the way
COMPOSITES
news Calls for papers
ICI pilot the w a y
Calls are issued for the following conferences:
The use of terephthalic polyester resins in the production of grp hulls is being pioneered by the Tyler Boat Company and ICI. Tylers are building - with the backing of ICI - a 12.2m 'Poseidon' pilot boat (see Fig.1 ) as a development project that ICI feel could have an important influence on grp laminating
8th National SAMPE Technical Conference, Seattle, Washington, USA, October 12-14, 1976. The theme of the conference - entitled 'Bi-Centennial Materials Review, Part 2' - is to be a review of materials technology and its influence on current and future transportation and defence systems. Papers are solicited on Materials Processing, Design and Analysis as applied to military and commercial vehicles, Energy systems, Lumber industry and Marine systems. Two copies of abstracts (no longer than 250 words) together with author(s) name, affiliation and address should be submitted, before November 14 1975, to: Mr. John T. Hoggatt (M. S. 47-01), The Boeing Company, PO Box 3999, Seattle, Washington 98124, USA.
systems for the next generation of workboats and sailing craft. The innovation of the construction lies in the use of 'lmpol" T400 terephthalic acid based resin for the hull, deck and superstructure: this is the first time the resin has been used on a vessel of this size. ICI claim that compared with conventional marine polyesters, Impol T400 increases
Composites 76, Constance, FDR, March 31-April 2, 1976. This conference, being jointly organised by the Composites and Special Metals Committees of Deutsche Gesellschaft fLir Metallkunde, has, as its central theme, the subject of 'Solutions to current problems in the use of surface laminations, coatings and laminated composites'. Particular attention is being given to the following topics: protective coatings (against corrosion); thermal insulation coatings; diffusion barriers; joining techniques; design and testing. Short (15 minutes presentation) papers on these topics are sought; similar length papers on new developments in the field of composite materials can also be considered. Prospective authors should send abstracts to: Deutsche Gessellschaft fLir Metallkinde, D 637 Oberursel (Taunus), Adenauerallee 21, FDR.
242
Fig.1 ICl'sImpo[ 1-4OOunsaturated polyester resin is being used in the constructionof boat hulls at Tylers° factory in Tonbridge, Kent
COMPOSITES. NOVEMBER 1975
COMPOSITES
news the strength retention of the grp laminates and reduces their water absorption - both properties highly desirable for marine applications. Good chemical resistance and high heat distortion are other claimed advantages. Also featured in the boat's construction are laminates made with ICl's Impol K resin which is being used to make several of the hull's ancillary components (see also Composites news, March 1975 p 51 for details of Impol K). Enquiries about Impol T400 should be made to: B. T. Garland, Public Relations Department, ICI, Millbank, London SWl ; and about the boat to: D. J. Hobbis, Tyler Boat Company Ltd., Tonbridge, Kent, England.
Carried a w a y on Z y t e l
Glass-reinforced nylon 66 - in the form of Du Pont's 'Zytel' with 13% reinforcement - has replaced stainless steel for a line of conveyor belts used primarily in the food industry. The manufacturers of the conveyor systems, Umec Boydell, needed a material that could overcome the disadvantages of stainless steel namely expense, difficulty of fabrication, higher driving power and difficulty of cleaning. Also required was the ability to operate in conditions of extreme temperature variation (typically, from 100°C to -40°C) and environment without lubrication. The use of glass-reinforced Zytel has been particularly successful: a feature of the new belts is their modular construction, with a variety of injection-moulded module elements being employed (see Fig.2). The use of these elements means that should a fault occur, the element is easily replaced without disturbing the entire conveyor system. R. G. Paterson, Public Affairs Dept, Du Pont (United Kingdom) Ltd, 18 Bream's Buildings, Fetter Lane, London EC4A 1HT
COMPOSITES. NOVEMBER 1975
Fig.2 Rangeof modular conveyor belting elements injection moulded in glass-reinforced Zytel (E)u Pont's nylon 66)
M a k e m o r e w i t h sandwiches
Unitex Marine have made available Part 3 of their booklets on 'Uniform technology'. The booklet is divided into two main sections: the first gives basic information on laminates (eg moments of inertia, lowest shear strengths, weights, strength-to-weight ratios). The second part is aimed at designers and builders of large shell structures - in particular boats. The main argument used is that of the influence of skin and beam deflection on the choice of laminate as opposed to choice influenced by strength. The proposal is made that if a designer decides to control selection by deflection, not strength, then over a wide range of boats (for example) cladding skins could be standardised and only the foam thickness and spacing between Iongitudinals would need to be adjusted. The booklet also makes allowance for designers having their own choice of cladding material (ie not those suggested by Unitex), in that the Company offer time on their computers for the provision of data similar to that given in Part 3 but based on the customer's information.
The booklet can be obtained (price £4, or £5 overseas) from: Unitex Marine, Knaresborough, North Yorkshire, HG5 0PP, England. Part 1 and Part 2 (Section A) with Part 3 and material specification sheets are also available, price £5 (£6 overseas) from the same address.
H a r w e l l on show
'Solving material problems for industry' is the title of a recently published guide to Harwell's specialist skills in the field of materials. The intention is that industry be made aware of the skills and (hopefully) take advantage of the expertise available. Areas of work covered include: ceramics fabrication; carbon-graphite work; composite materials; inorganic fibres; metals; special powders; surfaces and coatings; corrosion and corrosion prevention; ion-beam techniques; materials bonding; and superconducting materials. Copies of the guide are available on request to: Dr. Roy Johnston, Materials Development, Building 552, Harwell, Oxfordshire OX11 0RA, England.
243
news Calls for papers
ICI pilot the w a y
Calls are issued for the following conferences:
The use of terephthalic polyester resins in the production of grp hulls is being pioneered by the Tyler Boat Company and ICI. Tylers are building - with the backing of ICI - a 12.2m 'Poseidon' pilot boat (see Fig.1 ) as a development project that ICI feel could have an important influence on grp laminating
8th National SAMPE Technical Conference, Seattle, Washington, USA, October 12-14, 1976. The theme of the conference - entitled 'Bi-Centennial Materials Review, Part 2' - is to be a review of materials technology and its influence on current and future transportation and defence systems. Papers are solicited on Materials Processing, Design and Analysis as applied to military and commercial vehicles, Energy systems, Lumber industry and Marine systems. Two copies of abstracts (no longer than 250 words) together with author(s) name, affiliation and address should be submitted, before November 14 1975, to: Mr. John T. Hoggatt (M. S. 47-01), The Boeing Company, PO Box 3999, Seattle, Washington 98124, USA.
systems for the next generation of workboats and sailing craft. The innovation of the construction lies in the use of 'lmpol" T400 terephthalic acid based resin for the hull, deck and superstructure: this is the first time the resin has been used on a vessel of this size. ICI claim that compared with conventional marine polyesters, Impol T400 increases
Composites 76, Constance, FDR, March 31-April 2, 1976. This conference, being jointly organised by the Composites and Special Metals Committees of Deutsche Gesellschaft fLir Metallkunde, has, as its central theme, the subject of 'Solutions to current problems in the use of surface laminations, coatings and laminated composites'. Particular attention is being given to the following topics: protective coatings (against corrosion); thermal insulation coatings; diffusion barriers; joining techniques; design and testing. Short (15 minutes presentation) papers on these topics are sought; similar length papers on new developments in the field of composite materials can also be considered. Prospective authors should send abstracts to: Deutsche Gessellschaft fLir Metallkinde, D 637 Oberursel (Taunus), Adenauerallee 21, FDR.
242
Fig.1 ICl'sImpo[ 1-4OOunsaturated polyester resin is being used in the constructionof boat hulls at Tylers° factory in Tonbridge, Kent
COMPOSITES. NOVEMBER 1975
COMPOSITES
news the strength retention of the grp laminates and reduces their water absorption - both properties highly desirable for marine applications. Good chemical resistance and high heat distortion are other claimed advantages. Also featured in the boat's construction are laminates made with ICl's Impol K resin which is being used to make several of the hull's ancillary components (see also Composites news, March 1975 p 51 for details of Impol K). Enquiries about Impol T400 should be made to: B. T. Garland, Public Relations Department, ICI, Millbank, London SWl ; and about the boat to: D. J. Hobbis, Tyler Boat Company Ltd., Tonbridge, Kent, England.
Carried a w a y on Z y t e l
Glass-reinforced nylon 66 - in the form of Du Pont's 'Zytel' with 13% reinforcement - has replaced stainless steel for a line of conveyor belts used primarily in the food industry. The manufacturers of the conveyor systems, Umec Boydell, needed a material that could overcome the disadvantages of stainless steel namely expense, difficulty of fabrication, higher driving power and difficulty of cleaning. Also required was the ability to operate in conditions of extreme temperature variation (typically, from 100°C to -40°C) and environment without lubrication. The use of glass-reinforced Zytel has been particularly successful: a feature of the new belts is their modular construction, with a variety of injection-moulded module elements being employed (see Fig.2). The use of these elements means that should a fault occur, the element is easily replaced without disturbing the entire conveyor system. R. G. Paterson, Public Affairs Dept, Du Pont (United Kingdom) Ltd, 18 Bream's Buildings, Fetter Lane, London EC4A 1HT
COMPOSITES. NOVEMBER 1975
Fig.2 Rangeof modular conveyor belting elements injection moulded in glass-reinforced Zytel (E)u Pont's nylon 66)
M a k e m o r e w i t h sandwiches
Unitex Marine have made available Part 3 of their booklets on 'Uniform technology'. The booklet is divided into two main sections: the first gives basic information on laminates (eg moments of inertia, lowest shear strengths, weights, strength-to-weight ratios). The second part is aimed at designers and builders of large shell structures - in particular boats. The main argument used is that of the influence of skin and beam deflection on the choice of laminate as opposed to choice influenced by strength. The proposal is made that if a designer decides to control selection by deflection, not strength, then over a wide range of boats (for example) cladding skins could be standardised and only the foam thickness and spacing between Iongitudinals would need to be adjusted. The booklet also makes allowance for designers having their own choice of cladding material (ie not those suggested by Unitex), in that the Company offer time on their computers for the provision of data similar to that given in Part 3 but based on the customer's information.
The booklet can be obtained (price £4, or £5 overseas) from: Unitex Marine, Knaresborough, North Yorkshire, HG5 0PP, England. Part 1 and Part 2 (Section A) with Part 3 and material specification sheets are also available, price £5 (£6 overseas) from the same address.
H a r w e l l on show
'Solving material problems for industry' is the title of a recently published guide to Harwell's specialist skills in the field of materials. The intention is that industry be made aware of the skills and (hopefully) take advantage of the expertise available. Areas of work covered include: ceramics fabrication; carbon-graphite work; composite materials; inorganic fibres; metals; special powders; surfaces and coatings; corrosion and corrosion prevention; ion-beam techniques; materials bonding; and superconducting materials. Copies of the guide are available on request to: Dr. Roy Johnston, Materials Development, Building 552, Harwell, Oxfordshire OX11 0RA, England.
243