"el tap de rosca: secrets i utilitzacions”, a càrrec del sr. luca carosso (hite)

XXIIè CONGRÉS I LA NIT DE L’ENOLOGIA DE L’ACE1 i 2 d’abril de 2011

Alplast spa - ITALIA

Tapas Rosca

Intruduction

Winemaking is capturing elements

Bottling is preserving these elements :

-Mantein the elements throught the life of wine

-Allow them to develop and mature properly

In this process, the seal of the bottle is vital

Screw cap

In the modern wine world, every producercompetes on a global stage against an evergrowing number of players.

The market is more competitive than in anyother area.

TARGET

To create the hightest quality product

The most appealing package

The most affordable price

Screw Capsules History

1856 Invention of screw cap, with a cork disk attached

1889 screw cap patented in UK

1930s Wine study University of California Davis

1959-1966 various tests on Boreaux , Bourgundry and Alsace winesprovide consistents results

1970s First trials in Switzerland and Italy

1975 Australian Saltram, McWilliams, Yalamba release red and whitewine with screw

1980s Swiss winemakers turn to screw caps “en masse”

1990 Saranex liners introduced – BVS finish introduced

2002 UK supermarket Tesco and Sainsbury stipulate wines in screwcaps

The bottle neckBVS

The linersSanex – Saranex+TIN

SaranexExpanded Polietylene

LDPE

EPEFoam

TINPaper Kraft

LDPE or PVDC Film

The seal

Old seal with NO deformation

Reasons for choosing screw caps forwine

Remove the risk of cork taint (TCA)Remove the threat of spodadic oxidationAvoid Flavour modificationAllow the proper ageing of wines (red and wine)Mantain a reliable long-term sealFacilitate vertical storageProvide greater resistance to temperature changeNot effected by humydityWines can be celalred for longer periodEasy to open and resealCheapCan be Ricycled

Oxigen ingress is not a condition forwine ageing

The measurements for oxygen permeation throught corksand screw caps reveal a great deal about the role ofoxygen in wine development.These results have come to light only in recent years

Corks 0,0001 – 0,1227 mL O2 per dayScrew 0,0002 – 0,0008

Production Process

Aluminium foils

Quality control

Aluminium:mechanical characteristicsDimensionsAppearance –Grain

LinerWidth and diameterAspectCompressibilityElastic recovery

Production Process

Litho printing Quality control

Flat PrintingVarnished dry filmAppearance and colourBehaviour of coating

Production Process

Production Process

Embossing and drawing

Quality control

Dimensions of drawn piecePrinting centredAppearanceTrimming ring

Production Process

Production Process

Production Process

Production Process

Production Process

Side decoration

Quality control

ColourAppearaneBehavious of printing on beading area.

Beading and insertionof the liner.

Quality control

BeadingDimensionSkirt diameterBead diameterPerforation diameterAppearance

Insertion of linerIdentification of liner and traceabilityInspect presence of liner byphoto cells and mechanicals cell

Capping Test

Quality control

Opening TorqueBridge performance uponcappingVarnish performance uponcapping

Capping

Head pressure 140-180 kgPressure block 27,5 +/- 0,01 mmPressure block reform indentationdept 1,5 +/- 0,1 mm

Side pressure for rollers 8-12 kg

Roller Nose Radius 0,75-0,80 mm

Opening torque 8-14 kg/cm (0.9-1.90Nm) (6-20 extreme)

Winemaking and ChemistryDissolved Oxigen

Carbon Dioxide CO2

Sulphur Dioxide SO2

All wines should be organoleptically and analitically assessed bythe winemakers for final adjustment prior to bottling. The reliable, inert seal provided by the screw cap ensure that this closurepreserves the integrity of the wine entrusted to it.The extent of the impact of teh closure on the wine, has led some to even suggest that it should be included in any discussion of“terroir”.