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New Materials

New Materials 42 AIRCRAFT ENGINEERING May 1971 glass needed a multi-layer coating to protect the cover cement from ultra-violet rays. The new glass has been made from a formula evolved after six years of experiment by Pilkington scientists. Designated CMS, ceria-doped glass pro­ vides a highly emissive surface which efficiently radi­ ates waste heat. The covers are light, cheaper, more reliable and Brief Particulars of Recently Introduced Materials likely have a longer life than conventional types. The company is currently producing 8,500 for ESRO-4. to have Aircraft, Missile or Space Vehicle Applications They are being supplied to the German firm A.E.G. Telefunken which supplies the solar cells. Hawker Siddeley Dynamics are the main contractors for the satellite which forms part of the programme of the GENERAL PURPOSE SINGLE PACK GS.3 to the surface of the component before it is processed European Space Research and Technology Centre at ADHESIVE through the normal black metallic particle process, Noordwijk, Holland. and then inspecting it under ultra-violet light, defects Pilkington aimed to manufacture a glass with in­ Ultraseal Ltd., the impregnation specialists of 824 show up clearly as black indications in sharp contrast built anti-radiation properties and to dispense with Yeovil Road, Slough Trading Estate, Slough, Bucks., to the bright yellow fluorescent background. the expensive and vulnerable coatings, of which there have announced the introduction of a new, single This high level of contrast is particularly useful for are sometimes as many as seventeen. Dr Raymond pack, polyester resin based adhesive for commercial searching for flaws in tubes or in the bores of shafts, Bastick, technical consultant at the group company and industrial use. Designated GS.3, the new ad­ where the admission of daylight to achieve sufficient Chance Brothers, Birmingham, started the early work hesive is suitable for bonding most common materials contrast is difficult or impossible. It is also helpful on experimenting with various additives to the basic including wood, metal, rubber, leather, textiles, in locating fine or awkwardly situated defects such as mix of sand, limestone and dolomite, from which ceramics and glass, and is expected to find numerous those in the threads of bolts, shafts, etc. glass is made. applications in a wide variety of industries such as The new material docs not reduce the magnetic He found that the addition of several per cent aeronautical engineering, car manufacture, electronics, sensitivity of the process, is non-inflammable and is cerium oxide has the right effects. The glass was not electrical engineering, machine tools, production discoloured by radiation and the elimination of the engineering, packaging, building, etc. A notable readily removed by trichloroethylene vapour de- multi-layer coating considerably reduced the chances feature of GS.3 adhesive is its rapid curing at lower greasing. of failure due to delamination and made cheaper temperatures than are normally required, e.g. at Further information available from Sales Depart­ manufacture possible. 120 deg. - 140 deg. C (248 deg. - 284 deg. F) curing is ment, Ardrox Ltd., Commerce Road, Brentford, Middlesex. The only coating which is needed is vacuum deposi­ achieved within 50 seconds. Both the cure time and ted by Pilkington Perkin-Elmer Ltd., of St. Asaph, temperature, however, can be varied to suit custo­ Flintshire, who process and market the covers. That mers' specific requirements. coating which is common to all solar cell covers is a ILFOSCRIPT PRINT OUT RECORDING The adhesive, which contains no non-crosslinking layer of magnesium fluoride which acts as an anti- volatile matter, exhibits high tensile strength at eleva­ PAPER reflection agent in order to improve the glass's ted temperatures, is oil and water proof and has good A photographic recording paper which gives transmittance for the light which is required by the chemical resistance. It spreads easily, without visible records without the need for chemical pro­ solar cell. shrinkage or cracking and has excellent gap filling cessing, is now being marketed by Ilford as Ilfoscript capacity. Thermal curing can be effected by direct Extensive testing of the new CMS glass was carried Print Out Recording Paper. This paper was pre­ out by the Mullard Central Materials Laboratory, in heat transfer radiation and induction where ferrous viously, as a Special Product, called S.P. 191. collaboration with the Royal Aircraft Establishment, materials are involved. Curing may also be carried Ilfoscript is designed for use in oscillographs Farnborough. Samples were bombarded with radia­ out using di-electric or induction fields or a suitable fitted with high intensity light sources and is coated tion similar to that which they would meet in space. irradiation source such as a cobalt 60 unit. on a thin paper base - approximately 0·10 mm The official report said that the glass was shown to Further details of the new Ultraseal GS.3 adhesive thick. It is sensitive to blue and ultra-violet and is be superior and potentially cheaper than the products can be obtained on request from the manufacturers. intended for exposure to high intensity light sources currently in use. such as mercury vapour lamps. When Ilfoscript is used in suitable oscillographs it is capable of record­ NON-STICK GELCOAT ing writing speeds as high as 1,250 metres per second. A polyester gelcoat resin for GRP mould manu­ The paper emerges from most types of recorder with facture, which requires no release agent, has just an invisible or very weak image. This will intensify ANTI-SCUFFING LUBRICANT FROM been introduced by Scott Bader Co. Ltd., Wollaston, in normal room lighting, whilst if preferred, more ACHESON Wellingborough, Northants NN9 7RL, manufac­ rapid intensification may be gained by passing the A new spray which prevents metal pick-up, seizure turers of Crystic polyester resins. paper under a fluorescent light. However, excessively and heavy wear under extreme or shock loadings and The new product, Crystic Gelcoat 15, is the result bright lighting may cause degradation of the tones high temperatures, is now available from Acheson of a development programme undertaken by Scott and background fog. Colloids Co., Plymouth. Bader in conjunction with LCI., who have developed The records provided by the Ilfoscript paper are Acheson Anti-Scuffing Spray is an aerosol packed a special grade of Fluon PTFE as an important reasonably permanent if kept in folders, though anti-scuffing paste which offers significant advantages ingredient in the resin formulation. repeated viewing will cause gradual deterioration. for assembly, running-in and maintenance applica­ GRP moulds made with Crystic Gelcoat 15 need Permanent records can be made by processing in tions. neither the application of release agents, nor polishing Ilfoscript Permanizer Solution, either with or with­ In most applications, an anti-scuffing paste has to between mouldings. These time-consuming tasks out photodevelopment. be rubbed out to a thin uniform film on bearing sur­ are therefore eliminated and the labour force freed Ilfoscript Print Out Recording Paper can be handled faces. This can be a time-consuming task where large for more productive work. Mould turn around time before use in subdued lighting. No darkroom pre­ areas or intricate surfaces have to be covered. is also speeded up, and moulding release is easier than cautions are necessary when loading the paper into The rapid coating action of Acheson Anti-Scuffing when ordinary GRP moulds and conventional the instrument, provided exposure to bright daylight Spray gives the same protective film in a fraction of release agents are used. is avoided. Further information may be obtained the time. In addition, it offers closer control over The hard wearing surface of Crystic Gelcoat 15 from Ilford Marketing or Technical Services Depart­ coating thickness, allowing more economical applica­ is resistant to styrene attack and requires only mini­ ments, Ilford, Essex. tion and consistent results. mal attention in service. Moulds can now be used The 500 g. aerosol pack completely protects the continuously without having to be taken out of ser­ lubricant from contamination in storage and in use. vice periodically in order that the surface may be cut NEW GLASS MEANS LONGER LIFE FOR Further information is obtainable from Acheson back and the finish restored. Moulds made with SATELLITES Colloids Co., Prince Rock, Plymouth. Crystic Gelcoat 15 are still in service in good condi­ Pilkington has developed a new glass cover for tion after more than 1200 mouldings and the original solar cells which will give them a longer life in space mould surface has been maintained without the need through increased protection from harmful radiation. for abrasion or polishing. The covers will be used in the European research Crystic Gelcoat 15 is suitable for the fabrication of satellite ESRO-4, due to be launched from Cali­ most types of GRP moulds which do not require a fornia in September 1972, and are being evaluated by gloss finish. Crystic Gelcoat 15 will doubtless have the American COMSAT (Communications satellite) far reaching repercussions in the GRP industry Corporation and by NASA (National Aeronautics which has long been seeking the means to increase and Space Administration) which will test samples productivity without sacrificing quality. on its Orbital Astronomical Observatory. Full technical details are contained in Technical The covers include cerium oxide in the basic Leaflet No. 553, available on request. glassmaking mix and this has solved problems of discolouration, caused by radiation, which signi­ FLUORESCENT CONTRAST LACQUER ficantly reduced the cells' efficiency. Ardrox have developed a new fluorescent lacquer, Satellites use the solar cells to convert light from Ardrox 8-385, for use with black magnetic particle the sun into electrical power but the cells need covers fluids in the inspection of ferro-magnetic alloys under to protect them from radiation and micro-meteorites. Any reduction in the transparency of the covers, difficult visibility conditions. however, has an adverse effect. With the conventional method or inspection, con­ Another problem faced with the conventional trast is obtained by the difference in reflectivity cover, each about the size of a postage stamp and between the black magnetic particles and the surround­ only a few thousandths of an inch thick, was that the ing metallic surface. By applying a coating of 8-385 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

New Materials

Aircraft Engineering and Aerospace Technology , Volume 43 (5): 1 – May 1, 1971

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb034774
Publisher site
See Article on Publisher Site

Abstract

42 AIRCRAFT ENGINEERING May 1971 glass needed a multi-layer coating to protect the cover cement from ultra-violet rays. The new glass has been made from a formula evolved after six years of experiment by Pilkington scientists. Designated CMS, ceria-doped glass pro­ vides a highly emissive surface which efficiently radi­ ates waste heat. The covers are light, cheaper, more reliable and Brief Particulars of Recently Introduced Materials likely have a longer life than conventional types. The company is currently producing 8,500 for ESRO-4. to have Aircraft, Missile or Space Vehicle Applications They are being supplied to the German firm A.E.G. Telefunken which supplies the solar cells. Hawker Siddeley Dynamics are the main contractors for the satellite which forms part of the programme of the GENERAL PURPOSE SINGLE PACK GS.3 to the surface of the component before it is processed European Space Research and Technology Centre at ADHESIVE through the normal black metallic particle process, Noordwijk, Holland. and then inspecting it under ultra-violet light, defects Pilkington aimed to manufacture a glass with in­ Ultraseal Ltd., the impregnation specialists of 824 show up clearly as black indications in sharp contrast built anti-radiation properties and to dispense with Yeovil Road, Slough Trading Estate, Slough, Bucks., to the bright yellow fluorescent background. the expensive and vulnerable coatings, of which there have announced the introduction of a new, single This high level of contrast is particularly useful for are sometimes as many as seventeen. Dr Raymond pack, polyester resin based adhesive for commercial searching for flaws in tubes or in the bores of shafts, Bastick, technical consultant at the group company and industrial use. Designated GS.3, the new ad­ where the admission of daylight to achieve sufficient Chance Brothers, Birmingham, started the early work hesive is suitable for bonding most common materials contrast is difficult or impossible. It is also helpful on experimenting with various additives to the basic including wood, metal, rubber, leather, textiles, in locating fine or awkwardly situated defects such as mix of sand, limestone and dolomite, from which ceramics and glass, and is expected to find numerous those in the threads of bolts, shafts, etc. glass is made. applications in a wide variety of industries such as The new material docs not reduce the magnetic He found that the addition of several per cent aeronautical engineering, car manufacture, electronics, sensitivity of the process, is non-inflammable and is cerium oxide has the right effects. The glass was not electrical engineering, machine tools, production discoloured by radiation and the elimination of the engineering, packaging, building, etc. A notable readily removed by trichloroethylene vapour de- multi-layer coating considerably reduced the chances feature of GS.3 adhesive is its rapid curing at lower greasing. of failure due to delamination and made cheaper temperatures than are normally required, e.g. at Further information available from Sales Depart­ manufacture possible. 120 deg. - 140 deg. C (248 deg. - 284 deg. F) curing is ment, Ardrox Ltd., Commerce Road, Brentford, Middlesex. The only coating which is needed is vacuum deposi­ achieved within 50 seconds. Both the cure time and ted by Pilkington Perkin-Elmer Ltd., of St. Asaph, temperature, however, can be varied to suit custo­ Flintshire, who process and market the covers. That mers' specific requirements. coating which is common to all solar cell covers is a ILFOSCRIPT PRINT OUT RECORDING The adhesive, which contains no non-crosslinking layer of magnesium fluoride which acts as an anti- volatile matter, exhibits high tensile strength at eleva­ PAPER reflection agent in order to improve the glass's ted temperatures, is oil and water proof and has good A photographic recording paper which gives transmittance for the light which is required by the chemical resistance. It spreads easily, without visible records without the need for chemical pro­ solar cell. shrinkage or cracking and has excellent gap filling cessing, is now being marketed by Ilford as Ilfoscript capacity. Thermal curing can be effected by direct Extensive testing of the new CMS glass was carried Print Out Recording Paper. This paper was pre­ out by the Mullard Central Materials Laboratory, in heat transfer radiation and induction where ferrous viously, as a Special Product, called S.P. 191. collaboration with the Royal Aircraft Establishment, materials are involved. Curing may also be carried Ilfoscript is designed for use in oscillographs Farnborough. Samples were bombarded with radia­ out using di-electric or induction fields or a suitable fitted with high intensity light sources and is coated tion similar to that which they would meet in space. irradiation source such as a cobalt 60 unit. on a thin paper base - approximately 0·10 mm The official report said that the glass was shown to Further details of the new Ultraseal GS.3 adhesive thick. It is sensitive to blue and ultra-violet and is be superior and potentially cheaper than the products can be obtained on request from the manufacturers. intended for exposure to high intensity light sources currently in use. such as mercury vapour lamps. When Ilfoscript is used in suitable oscillographs it is capable of record­ NON-STICK GELCOAT ing writing speeds as high as 1,250 metres per second. A polyester gelcoat resin for GRP mould manu­ The paper emerges from most types of recorder with facture, which requires no release agent, has just an invisible or very weak image. This will intensify ANTI-SCUFFING LUBRICANT FROM been introduced by Scott Bader Co. Ltd., Wollaston, in normal room lighting, whilst if preferred, more ACHESON Wellingborough, Northants NN9 7RL, manufac­ rapid intensification may be gained by passing the A new spray which prevents metal pick-up, seizure turers of Crystic polyester resins. paper under a fluorescent light. However, excessively and heavy wear under extreme or shock loadings and The new product, Crystic Gelcoat 15, is the result bright lighting may cause degradation of the tones high temperatures, is now available from Acheson of a development programme undertaken by Scott and background fog. Colloids Co., Plymouth. Bader in conjunction with LCI., who have developed The records provided by the Ilfoscript paper are Acheson Anti-Scuffing Spray is an aerosol packed a special grade of Fluon PTFE as an important reasonably permanent if kept in folders, though anti-scuffing paste which offers significant advantages ingredient in the resin formulation. repeated viewing will cause gradual deterioration. for assembly, running-in and maintenance applica­ GRP moulds made with Crystic Gelcoat 15 need Permanent records can be made by processing in tions. neither the application of release agents, nor polishing Ilfoscript Permanizer Solution, either with or with­ In most applications, an anti-scuffing paste has to between mouldings. These time-consuming tasks out photodevelopment. be rubbed out to a thin uniform film on bearing sur­ are therefore eliminated and the labour force freed Ilfoscript Print Out Recording Paper can be handled faces. This can be a time-consuming task where large for more productive work. Mould turn around time before use in subdued lighting. No darkroom pre­ areas or intricate surfaces have to be covered. is also speeded up, and moulding release is easier than cautions are necessary when loading the paper into The rapid coating action of Acheson Anti-Scuffing when ordinary GRP moulds and conventional the instrument, provided exposure to bright daylight Spray gives the same protective film in a fraction of release agents are used. is avoided. Further information may be obtained the time. In addition, it offers closer control over The hard wearing surface of Crystic Gelcoat 15 from Ilford Marketing or Technical Services Depart­ coating thickness, allowing more economical applica­ is resistant to styrene attack and requires only mini­ ments, Ilford, Essex. tion and consistent results. mal attention in service. Moulds can now be used The 500 g. aerosol pack completely protects the continuously without having to be taken out of ser­ lubricant from contamination in storage and in use. vice periodically in order that the surface may be cut NEW GLASS MEANS LONGER LIFE FOR Further information is obtainable from Acheson back and the finish restored. Moulds made with SATELLITES Colloids Co., Prince Rock, Plymouth. Crystic Gelcoat 15 are still in service in good condi­ Pilkington has developed a new glass cover for tion after more than 1200 mouldings and the original solar cells which will give them a longer life in space mould surface has been maintained without the need through increased protection from harmful radiation. for abrasion or polishing. The covers will be used in the European research Crystic Gelcoat 15 is suitable for the fabrication of satellite ESRO-4, due to be launched from Cali­ most types of GRP moulds which do not require a fornia in September 1972, and are being evaluated by gloss finish. Crystic Gelcoat 15 will doubtless have the American COMSAT (Communications satellite) far reaching repercussions in the GRP industry Corporation and by NASA (National Aeronautics which has long been seeking the means to increase and Space Administration) which will test samples productivity without sacrificing quality. on its Orbital Astronomical Observatory. Full technical details are contained in Technical The covers include cerium oxide in the basic Leaflet No. 553, available on request. glassmaking mix and this has solved problems of discolouration, caused by radiation, which signi­ FLUORESCENT CONTRAST LACQUER ficantly reduced the cells' efficiency. Ardrox have developed a new fluorescent lacquer, Satellites use the solar cells to convert light from Ardrox 8-385, for use with black magnetic particle the sun into electrical power but the cells need covers fluids in the inspection of ferro-magnetic alloys under to protect them from radiation and micro-meteorites. Any reduction in the transparency of the covers, difficult visibility conditions. however, has an adverse effect. With the conventional method or inspection, con­ Another problem faced with the conventional trast is obtained by the difference in reflectivity cover, each about the size of a postage stamp and between the black magnetic particles and the surround­ only a few thousandths of an inch thick, was that the ing metallic surface. By applying a coating of 8-385

Journal

Aircraft Engineering and Aerospace TechnologyEmerald Publishing

Published: May 1, 1971

There are no references for this article.