Quality grading of cork stoppers based on porosity, density and elasticity

The data in this paper are related to the research article entitled “Assessing the percentage of cork that a stopper should have from a mechanical perspective” (González and Terrazas, 2018). This data article contains data on the mechanical properties of different types of wine stoppers: 18 types of micro-agglomerated stoppers, three types of natural stoppers, and one type of co-extruded synthetic closure. Mechanical properties were evaluated with different analysis: Compression test for the maximum radial compression force, the young’s moduli and the diameter recovery, relaxation test for the relaxation force and the extraction test for the displacement force.

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“…As already reported in Sánchez González [1], the relaxation force [2] was measured with a device developed in the INIA-CIFOR Cork Laboratory [4].…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Dataset of mechanical properties from different types of wine stopper: Micro-agglomerated, natural cork and synthetic

Sánchez-González¹,

Pérez-Terrazas²

2018

Data in Brief

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“…One of the most important factors in the success of sealing and subsequent aging of wines is cork closure. Economically, the manufacturing of natural cork stoppers constitutes the most important use, adding value to wine, thanks to its long and inseparable association with the world of oenology [3]. Specifically, only in Andalusia, with wine production in the Jerez-Xérès-Sherry Designation of Origin, approximately 32 million bottles of wine and vinegar were sold in 2021, representing an increase of almost 11% in Jerez and Manzanilla wine exports, accompanied by significant growth in Spain as well, at 17.4% [4].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of the manufacturing process of cork stoppers for spirits using vegetable and textiles fibers

Suffo,

Martín-Alconchel

2023

Preprint

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Traditionally, cork stoppers composed of a plastic crown and a cork spike, usually agglomerated or technical, are used to seal the bottles. The use of synthetic plastic for crown caps derived from petroleum generates well-known environmental problems; therefore, it is of great interest to seek substitutes, deepen research, and develop new products and production methods focused on this powerful industry. This work aims to develop alternatives to the products currently available on the market, not only in terms of design and materials, but also by exploring alternative manufacturing methods such as compression molding and the possibility it offers for the incorporation of recycled materials into the product. The use of adhesives to bind other materials such as metals or wood provides numerous advantages in terms of durability, lightness, and design versatility. Through this work, adhesive binders will be tested to manufacture agrocomposites, which are blends of natural fibers and textiles functionalized as closures for spirits bottles. Likewise, the adhesion of the cork spike to the agrocomposite crown will be tested. The incorporation of materials previously considered as waste into resin matrix is being investigated. The designed mold has made it possible to manufacture prototypes with different resin-residue ratios.

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“…Cork porosity in raw cork planks is a decisive quality parameter for the industry of cork products (Costa and Pereira 2010) and particularly for the flowsheet of natural stoppers or discs, the highly valuable end-products (Costa and Pereira 2006;González-Hernández et al 2014). The abundance and area of the lenticular channels affect several properties of cork (e.g.…”

Section: Introductionmentioning

confidence: 99%

Variation of cork porosity along the stem in harvested cork oak (Quercus suber L.) trees

Costa

Barbosa

Miguel

et al. 2021

Annals of Forest Science

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& Key message Cork porosity, due to lenticular channels, varied along the stem of Quercus suber L. Lenticular channels' area, rather than their number, decreased upwards along the stem. Area decrease was observed regardless of tree size and of its intrinsic porosity. & Context The cork of Quercus suber L. is radially crossed by lenticular channels, defining cork's natural porosity. It has been suggested that porosity decreases from the stem base upwards, but studies on such variation have not yet been presented. & Aims Three main research questions were addressed: (i) how large is the variation of cork porosity upwards along the stem; (ii) how does porosity variation relate with porosity traits, namely the size and number of lenticular channels and (iii) how much does porosity vary with stem height and between trees. & Methods We set up a study at tree level to quantify the porosity of cork samples from fixed stem heights. Our statistical modelling approach was based on linear mixed-effects models, given the nested structure of the data. In the model fitting, porosity was described as a function of tree stem height, while the random effects explained the source of variability introduced by different tree size (as given by stem diameter at breast height, D bh ) and porosity (as given by intrinsic porosity, CP bh ). & Results The lenticular channels' area rather than their number consistently decreased up the stem. The area proportion of the lenticular channels in the cork tissue (i.e. porosity coefficient) decreased by about 1.4% per metre upwards along the stem, regardless of tree size and of its porosity. & Conclusion Our findings highlight that the lenticular channels' traits greatly vary among trees, much more than within-tree, which may be an important clue to predict variations in cork properties, for decision-making on cork oak management.

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Quality grading of cork stoppers based on porosity, density and elasticity

Cited by 12 publications

References 8 publications

Dataset of mechanical properties from different types of wine stopper: Micro-agglomerated, natural cork and synthetic

Dataset of mechanical properties from different types of wine stopper: Micro-agglomerated, natural cork and synthetic

Feasibility of the manufacturing process of cork stoppers for spirits using vegetable and textiles fibers

Variation of cork porosity along the stem in harvested cork oak (Quercus suber L.) trees

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