There are various types of Technical Corks used as an alternative to natural corks.
In some cases these use the body of a natural cork to which we add natural granules to improve the visual aspect.
In others they are entirely composed of granules from the natural cork process.
The substance used to bind the granules has been specifically approved to allow contact with liquids.
'Technical corks were created for bottled wines which are consumed within a period of two to three years. They consist of a very dense agglomerate cork body with natural cork disks glued on one or both ends.Technical corks with a disk on both ends, are designated 1+1 technical corks. With two natural cork disks, they are known as 2+2 technical corks, and with two disks on one end, 2+0 technical corks. An approved food contact glue is used to bond the disks to the agglomerated cylindrical body'* © by APCOR
'As the name suggests, these corks were specially conceived to seal champagne, sparkling and gasified wines. Sparkling wine cork closures are considered to be in the technical cork category, as they are produced from an agglomerate cork granule body to which, on one of the ends, two or three selected natural cork disks are glued. Sparkling wine cork closures have a larger diameter than average corks.
Their larger diameter is essential in retaining the high internal pressures in gasified wine bottles. To get the best physical, chemical and microbiological performances, sparkling wine corks are subject to meticulous and rigorous quality controls. They are basically available in the following grades: “Extra”, “Superior”, 1st and 2nd. This may, however, vary according to the manufacturer'* © by APCOR
Micro agglomerated cork are manufactured from natural cork granules
'Agglomerated cork stoppers are entirely made of granulated cork, derived from by-products that are a result of the manufacture of natural cork closures.
Agglomerated corks are an economical solution in assuring good sealing for a period that should not, in general, exceed 12 months. Besides the economical advantage they represent, for low-priced wines with a high rotation, these corks are completely batch homogeneous. As this product is the result of a highly industrialized process, the only category variation of agglomerated cork closures is in the chosen cork granule size and in the surface treatment used'* © by APCOR