Q: How do you make closures from sugarcane?

For Nomacorc Green Line closures, the starting material is sugarcane which is distilled into bio-ethanol , then converted into bioethylene . The same bio-ethylene can be polymerized to bio-polyethylene . The polymerization is the same process as for petrol-based material and the biopolyethylene can be used for the production of any Nomacorc Green Line closure.

Question 1

How do you guarantee the absence of a cork taint?

Accepted Answer

The cork taste is due to the presence of the TCA molecule in cork, with a quantification threshold of 0.5 ng/L, which is well below the average perception threshold of TCA in wine.
Steps ensuring the absence of a cork taste:

We purchase cork particles according to specifications in which the maximum acceptable TCA level is 1 ng/L. Each batch received at our Rivesaltes site is also controlled by our Quality Department.
The particles are then dried before use. Drying is done in the presence of heat and vacuum, which are the two favorable factors for TCA elimination.
The extrusion process is also carried out in the presence of heat and vacuum.
Finally, the TCA level is rechecked in the finished product before shipping to the customer. Since the founding of SÜBR in 2016, we have received no complaints about a cork taint. Our measurements reveal TCA concentrations below quantification limits of 0.5 ng/L.

Question 2

Can I test Vinventions closures?

Accepted Answer

Yes, we offer the opportunity to test Vinventions’ closures. Please contact us to request samples. We are happy to provide you with the information and assistance you need to explore the quality and performance of our closures for your bottling tests.

Question 3

How do you make closures from sugarcane?

Accepted Answer

For Nomacorc Green Line closures, the starting material is sugarcane which is distilled into bio-ethanol, then converted into bioethylene. The same bio-ethylene can be polymerized to bio-polyethylene. The polymerization is the same process as for petrol-based material and the biopolyethylene can be used for the production of any Nomacorc Green Line closure.