M3™

M3™ - mylar based continuous yarns technology.

The major manufacturers have not changed their basic process in the last 20 years. Laminate sails are still built using yarns which are impregnated with resin and a scrim on both sides which is coated in resin to hold the membrane together. It is this resin that breaks down over time as the sail is hoisted, tacked and folded after racing or cruising. This causes delamination, the two sides of the membrane come apart and the sail loses structural strength as there is nothing to support the yarns in place. The resin also adds weight to the sail, initially this weight can be offset by the extra strength but as the resin breaks down the weight remains for less strength.

The M3™ technology doesn't need resin in the production of the sails and this has a number of advantages. When the yarns are impregnated with the resin and it sets, the yarns will become very hard in tension. As the sail moves and the yarns are bent and twisted, they will start to breakdown and the overall strength of the structure will be reduced. If the resin is removed, the yarns will remain soft, this means as the sail moves there is no difference in tension across the strand as the individual fibers that make up the strand can move independently. Removal of the extra yarns plus the significant mass of the resin in a laminate sail, results in a reduction in overall weight of at least 15-30%.

The M3™ skins are loaded into a vacuum bag which is pressurized to -0.95 bar, this equates to no less than 9 tons per square meter across the entire sail. The entire skin and bag is then loaded into a computer controlled oven. When the pressure and heat are applied to the sail the two layers of polymer react and fuse together to form a new layer of material in an irreversible process. This seals the two layers of Mylar together and encapsulates the structural threads. It is important to note that the polymer 'fuses' together and is not merely 'stuck' together, the resulting film is soft and flexible, delamination is not an issue anymore as there is no resin between the skins to break down over time. M3™ is a major advance from 'mould production' sail technology, which has demonstrated many limitations arising from: low temperature and a non uniform heating process acting on only one side of the sail (the main cause of delamination) and being physically limited in both size and shape of the 'one piece' sails because of the size and design of the mould.

It is the best choice for yachts of any length when the performance advantages and additional expense of carbon is not required.

From January 2009, all cruising and racing OneSails M3™ sails will be provided with a delamination warranty of three and two years respectively.

M3™ lamination
Press-fusion process: 9 tons at 120° C
Base Scrim

Yarns

Dry yarns

The yarns will remain soft, this means as the sail moves there is no difference in tension across the strand as the individual fibers that make up the strand can move independently.
Conventional lamination
Resin glued
Base Scrim

Yarns Resin

Resin glued yarns break easily

When the yarns are impregnated with the resin and it sets, the yarns will become very hard in tension. As the sail moves and the yarns are bent and twisted, they will start to breakdown and the overall strength of the structure will be reduced.

Hvorfor vælge OneSails

1. Banebrydende teknologi.
Gennem mere end 10 år har OneSails arbejdet med udviklingen af teknikker, som nu gør det muligt at producere sejl med gennemgående, ubrudte tråde til både cruise og race.
2. Højtydende.
Egenskaber som lavere vægt, styr på facon og sejlkurver, og minimal deformation ved belastning, betyder højere ydelse end traditionelle panel-sejl.
3. Kvalitet.
M3™ og 4T FORTE™ membranerne fremstilles eksklusivt i Italien på OneSails’ specialkonstruerede produktions anlæg, med alle dele af den avancerede produktion underkastet løbende kvalitetskontrol.
4. Design.
Den optimale facon for et sejl bygger på timer på vandet, analyse og erfaring. OneSails hører til i førerfeltet i sejlindustrien, med løbende investeringer i research og udvikling. Netop dét sikrer, at et sejl fra OneSails repræsenterer det nyeste, mest effektive design. OneSails’ kunder kan bekræfte dette. De er blandt de bedst placerede ved verdensmesterskaber, nationale og internationale sejladser verden over.
5. Service.
t levere første klasses service, rådgivning og praktisk assistance har fuld fokus hos alle OneSails sejllofter. OneSails’ team af eksperter står til rådighed for sejllofterne for at de kan yde maksimal service og rådgivning. Udover et stadig stigende antal sejllofter rundt om i verden, har OneSails Group et omfattende net af service centre strategisk placeret rundt langs Europas kyster.

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