JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 25

JCM: Concorde, another legendary aircraft! And then the material was adopted for other aircraft. R.P.: Indeed, because of the

JCM: Then, why did aramidbased aircraft composites almost disappear over the years? R.P First, the change in aircraft .:

experience gained in the Concorde by the design offices of British Aerospace and Aérospatiale. Both were now collaborating within Airbus Industries, and each was developing turbo-prop aircrafts for regional transport. The Airbus A300, and especially the A310, featured many semi-structural external composite parts such as wingto-body fairing, vertical-fin leading edges, radomes, tail cones and various moving flaps. Most turbo-prop aircraft were, and still are, equipped with wing leading edges protected by aramid composites, to protect fuel tanks from bird impact. Many turbo-prop aircrafts developed around the world, such as the Dash 7 and 8, ATR 42 and 72, Fokker 50, the Dornier 228 and 328, and many others, adopted the same systems. Many helicopters manufacturers around the world used parts based on Nomex® honeycomb cores and Kevlar® based-reinforcements, especially in crash zones.

the combination of three factors. First, airline companies were very much concerned with the water ingress problem, which meant the honeycomb cells would be filled with water, significantly increasing the weight of parts. Secondly, many airlines did not understand the nature of composites and did not want, nor know how, to repair composite parts. They Composites materials on ATR aircraft 72-500 put pressure

JCM: The problem was understood from the start and solutions existed. So why were aramid composites excluded from external semistructural parts? R.P I believe this resulted from .:

fire regulations excluded Kevlar® and its competitor Twaron® from aircraft interiors, because they did not meet the non-burn-through requirement in case of an exterior kerosene fire event (either at the airport or after a crash). Second, the so-called “water ingress” phenomenon in sandwich composite parts, resulting from stresses developed in the skins and the surface paints, brought a lot of concerns – even if the problem had not occurred in Europe, basically because lessbrittle decorative paints were used (PU instead of epoxybased paints).

No62 January - February 2011 / jec composites magazine

on aircraft manufacturers to almost ban aramid for external parts. The difficulty of acquiring proper tools and learning methods for cutting and Fast turkish patrol boat (19m, 40 knots) by Yonka Onuk machining aramid-based composites did compression strength, paranot help in that matter. Third, aramid fibre is not suitable for the availability of low-tex lightweight fishing rods, tennis carbon-fibre yarns at attractive rackets and golf clubs, or for prices and the adoption of bicycle frames. However, paracarbon-glass hybrid aramid is often used in reinforcements provided combination with structural engineers alternative solutions. carbon to minimize damage, provide protection and limit JCM: What about other crack formation. In conclusion, composite application areas para-aramid fibre for such as marine? composites fulfils some R.P In the early days, and still .: functional requirements while today, the emblematic carbon fibre fulfils most of the application for Kevlar® was in structural ones. canoes and kayaks. Low weight and impact resistance were JCM: Can you say few words about Kevlar®-based paper highly praised by many people for honeycomb cores? and for competition. In the R.P Well, since it was fairly .: marine sector, the search for weight savings has not often new when I retired from been a must. However, many DuPont, I’ll let the people in shipyards have adopted hybrid charge at DuPont answer the Kevlar®-glass reinforcements relevant questions. However, originally developed by Dr Halvar Loken of Dupont US Chomarat. It is worth and I wrote an exhaustive paper mentioning that the Turkish on the subject in 2004, which company Yonka has produced was published in issue 8 of JEC fast patrol boats based on pure Composites Magazine. Kevlar® fabric and vinylester In short, paper based on Kevlar® resin for many years. These 15- para-aramid fibre has higher 30-metre boats benefit from an properties than paper based on innovative design and wellthe traditional 30-year-old controlled production Nomex® meta-aramid fibre. methods, and they cruise at 40 This enables engineers to save knots. additional weight, especially welcome in the A340 and, of JCM: Why has para-aramid course, the A380 hardly been used in sporting programmes.n
goods? R.P Because of its modest .: Contact: pinzellir@yahoo.fr

25

Market



JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011

Cover
Edito
Points of view : solutions for every aircrafts
Contents
Agenda of Events
COMPANY & BUSINESS
In Brief
Carbon prepreg - Guangwei Composites, from a finished product to a semi-finished product
Incubation - Composites Technology Park: nurturing green composites
MRO - Mincham Aviation, a specialist with the ambition to match
APPLICATIONS
Automative - From Imagination to reality
Offshore - New carbon fibre compositecomponent for deep-sea use
Leisure - Tenchnology ready for gaming
MARKET
Trends - The natural gas vehicle market
Human capital - R&D manager : inside innovation
Market - An historical overview of the Para-aramid fibres for composites
FEATURE AUTOMATION
Filament winding - Automated filament-winding process for pole production
Robot - Multiple-use robots for composites part manufacturing
WPC - Compact, flexible extruder for new-comers to wood-plastic composites
Robotic - Robotic unit for the automated production of composite components
Injection - Thermoforming and injection moulding in a single mould
Testing - Robotics and non-destructive testing
RESEARCH & DEVELOPMENT
RTM - Highly integrated structure manufactured in on-shot with pre-preg UD tape
CNT - Multiscale hybrid carbon reinforcement for polymeric-matrix composites
Nano-composites - New thermoresistant nano-filled glue for composites
TECHNOLOGY & INNOVATIONS
Reinforcement - Fibre composites, those magical materials
Telecom - New polyster prepreg for composites radomeand antenna applications
Automotive - A new ultra-lightweight sandwich structure for the cars of tomorrow
Innovations
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Cover
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 2
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Edito
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Points of view : solutions for every aircrafts
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 5
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Contents
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 7
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Agenda of Events
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - In Brief
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Carbon prepreg - Guangwei Composites, from a finished product to a semi-finished product
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 11
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 12
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Incubation - Composites Technology Park: nurturing green composites
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - MRO - Mincham Aviation, a specialist with the ambition to match
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Automative - From Imagination to reality
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 16
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Offshore - New carbon fibre compositecomponent for deep-sea use
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Leisure - Tenchnology ready for gaming
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Trends - The natural gas vehicle market
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 20
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 21
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 22
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Human capital - R&D manager : inside innovation
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Market - An historical overview of the Para-aramid fibres for composites
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 25
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Pub
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Filament winding - Automated filament-winding process for pole production
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 27
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Robot - Multiple-use robots for composites part manufacturing
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 29
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 30
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 31
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - WPC - Compact, flexible extruder for new-comers to wood-plastic composites
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Robotic - Robotic unit for the automated production of composite components
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 34
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Injection - Thermoforming and injection moulding in a single mould
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Testing - Robotics and non-destructive testing
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 37
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 38
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 39
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - RTM - Highly integrated structure manufactured in on-shot with pre-preg UD tape
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 41
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 42
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - CNT - Multiscale hybrid carbon reinforcement for polymeric-matrix composites
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 44
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 45
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Nano-composites - New thermoresistant nano-filled glue for composites
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 47
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Reinforcement - Fibre composites, those magical materials
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 49
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Telecom - New polyster prepreg for composites radomeand antenna applications
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 51
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 52
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 53
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Automotive - A new ultra-lightweight sandwich structure for the cars of tomorrow
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 55
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - Innovations
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 57
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 58
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 59
JEC COMPOSITES MAGAZINE - Issue #62 - January/February 2011 - 60
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