Manufacturing process for corks intended for bottling still wine and corresponding corks

ES3073808T3Undetermined Publication Date: 2026-07-15DIAM BOUCHAGE (100 00)
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Patent Information

Application Number
ES2020306118T
Authority / Receiving Office
ES · ES
Patent Type
Patents
Current Assignee / Owner
Filing Date
2020-09-29
Publication Date
2026-07-15
Estimated Expiration
2040-09-29

AI Technical Summary

Technical Problem

Existing cork stoppers exhibit significant heterogeneity in oxygen transmission and potential contamination from polyurethane binders, leading to variability in wine aging and risk of volatile compound migration.

Method used

Manufacturing corks with cork strips and lateral strips arranged such that lenticels are parallel and perpendicular to the strip thickness, using a polyurethane binder to join them, and cleaning with supercritical CO2 to minimize binder contact and contamination, followed by polymerization and shaping.

Benefits of technology

The method produces corks with controlled oxygen permeability and reduced volatile compound migration, ensuring homogeneous aging and visual similarity to traditional corks.

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Abstract

Cork (15) intended for bottling still wines, characterized in that it comprises cork strips (11) joined laterally by a polyurethane binder to form a plurality of cork strips, the cork strips (11) being arranged so that their thickness is perpendicular to the axis of the cork, at least one lateral cork strip (13) being joined by a polyurethane binder to each face of the plurality of cork strips showing all the cork strips (11), the lenticels possibly present on the cork strips (11) extend parallel to the thickness of the strips while those of the lateral cork strips (13) extend perpendicular to the thickness of the strips, so that all the lenticels of the cork are arranged perpendicular to the axis of the cork to limit the variation of oxygen permeability from one cork to another.
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