A capsulated stopper (T-top, Bar-Top or Altop) is a natural or synthetic cork stopper where the end is glued into a cap of wood, PVC, porcelain, metal, glass or other material. They are generally used with liqueur/fortified wines or spirits which are ready to drink but not generally consumed in one sitting.
Popular with bartenders and consumers alike, they are practical to open and reseal thus finding favour with wineries and distilleries for port, sherry, whisky, brandy, calvados, tequila and many other spirits.
Assembling the cork to the cap is done either by automatic machines or by hand depending on volume and materials used. Glues, bonding agents and cork are all selected to meet FDA regulations and the assembled capsulated stopper must stand up to the demands of being repeatedly pulled and twisted in regular use, without the cork separating from the top cap – after all many are inserted in exclusive premium brands, which don’t come cheap.
Testing the quality of the adhesive bond between cork and cap is a fundamental check performed by manufacturers of capsulated stoppers and their customers.
Diam France required a consistent, reliable test system to assess the mechanical adhesive bond strength of their Altop range of stoppers. Featuring outstanding properties of rapid elastic return—to avoid leakage—plus consistent closure from bottle to bottle, Altop and Altop Diam stoppers come with Bar-Top caps in various materials (wood, plastic, glass) and diameters. It was important that the test system had the flexibility to test all different sizes with easy-to-use gripping fixtures.
Verifying the adhesive bond strength required the cork shank to be held in one grip and the Bar-Top cap to be held in a second grip. A testing method was developed which applied torque to the complete stopper until either the adhesive bond broke or the cork severed. The maximum torque applied was recorded and compared against established quality-control limits to determine pass/fail criteria.
The motorised torque tester, a Vortex-dV, applied torque at a constant speed of rotation ensuring that any variability due to inconsistent speed was eliminated. The peak torque was captured at a high data-acquisition rate to guarantee that any sudden fractures of adhesive or cork were not missed.
At higher torques, both the coated cork and the wooden/hard-plastic bartop caps are notoriously tricky to grip without slipping. To overcome this difficulty Mecmesin adapted proven engineering chucks with dedicated jaws to securely hold both components during the test. Each chuck has a square-drive mechanism which facilitates the use of a slipping torque wrench to open/close the chuck. This ability was critical in ensuring that each chuck was tightened to the same level, avoiding inconsistency from component damage or slippage by over- or under-tightening the specimens
- Vortex-dV Motorised Torque Tester
- 6 N.m Torque Transducer
- AFTI Torque Indicator
- Pair of dedicated chucks to hold the range of capsulated stoppers
Tensile testing wire joining systems
Our customer's wire joiners and tensioners are used extensively in the Building Services, Agriculture, Civil Engineering, Viticulture and Seismic Construction sectors and feature award-winning solutions for clamping, seismic bracing, suspension and hanging systems. As part of the continuous improvement ethic, the Quality and Design Department wanted to review their in-house methods and re-evaluate the test procedures for measuring break loads in their cable components.
Extreme sports waterproof bio-textile mechanical properties
Amphibio Ltd develops bio-inspired materials technology for the outdoor and extreme sports industry. Amphibio wanted to quantify the strength and mechanical properties of various single fibres, multifilament yarns, woven and knitted textiles and fabrics.
Automated syringe break-loose and glide force system
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Edge Crush Test (ECT) of corrugated cardboard
Over the weeks of COVID-19 lockdown confinement, there was a surge of home deliveries, with even e-commerce giants struggling to fulfil demands. Beyond household deliveries, cardboard is also an object serving on the frontline of public health services, enabling mass deliveries of vitally needed medical equipment..
Release torque testing of Champagne and sparkling wine corks
The Mecmesin CombiCork is a Quality tool that allows Korbel to test cork materials, ensuring they match with Korbel’s stringent quality standards. Testing removes subjectivity from the uncorking of champagne corks, troubleshooting our process or material variation, so our customers are able to have a consistent experience every time they open a bottle of the finest Korbel California Champagne
Vial stopper needle penetrability residual seal force and torque testing
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Hand sanitiser dispenser pump testing
Sales of antibacterial gels have soared enormously following National Health Service advice telling the public to thoroughly wash hands in order to stay protected from Coronavirus. In fact, even before the 2020 pandemic crisis, the presence of hand sanitisers had already become commonplace, not only in hospitals but also in schools, restaurants and offices.
Adhesion peel strength of COVID-19 tapes and stickers
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Break-loose and sustaining force tests of pre-filled drug cartridges to ISO 11608-3
Mechanical pen injectors for delivering drugs, such as insulin, have found increasing acceptance over the traditional vial-and-syringe method. To validate new pen injector designs and maintain quality when they are mass-produced requires extensive testing.
Vaccine delivery device and packaging testing
As COVID-19 has rapidly spread around the world, there is a concerted global effort to find a vaccine. Whether administered via an oral, subcutaneous, intramuscular, intradermal, or intranasal route, vaccines need to be administered via a medical device, and these must be tested to esnure they are safe and meet stringent standards and regulations
PET preforms - repurposing production for COVID-19 test kits
PET preforms are typically blow-moulded to create the ubiquitous plastic bottles containing carbonated and still beverages. The production process to fill and seal these bottles with a screw-cap is a demanding one, so a number of tests are performed to ensure quality control specifications are met for this core packaging.
Probiotic drink packaging testing
As demand for dietary supplements continues to surge, immune-boosting products, such as prebiotics and probiotics, are amongst the most popular. Getting these liquid probiotic products noticed by the consumer relies on eye-catching innovative packaging which must be easy-to-open and reseal whilst remaining economic to use for the beverage producer.
Testing Ventilator and Breathing Assistance Apparatus Components
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Face mask strength testing
Manufacturing masks is not as easy as you might imagine. International test standards exist to make sure the face masks can be verified to protect clinicians and patients from pathogens spread by blood, body fluids and secretions and now to limit the spread of COVID-19 coronavirus.
Pharmaceutical tablet crush and break strength
Many products come in tablet form, with a durability designed for both packaging and for use. Too brittle or too hard, and they may not be fit for use, or at best perform below expectation. The only way to determine consistency is mechanical testing of samples.
Lipstick tube force and torque testing
Testing the mechanical performance of the lipstick tube is a crucial part of the quality-control process for cosmetics manufacturers. Leading players in the cosmetics industry have come to rely on Mecmesin’s range of affordable force and torque testers to carry out checks on batches of lipsticks produced.
Mecmesin's materials testers
Testing the physical strength properties of materials, in accordance with international or in-house standards, is a key part of determining their characteristics to better understand the effects of process improvements. With this in mind, Mecmesin has designed a range of static-load Materials Testers powered by intuitive VectorPro MT software.
Top-load crush of plastic bottle with semi-automated test process
To guarantee their containers would perform as expected along customer production lines and remain intact during transportation and storage, US company, Silgan Plastics wanted to undertake top-load tests according to internal, customer and Supplier Packaging Information (SPI) standards.
Dispensing pump assembly testing
Mecmesin's customer manufactures a range of dispensing pumps for the cosmetic and beauty-care industry. A requirement was identified to measure the actuation force of the pump assembly and the pull-off force of the pump handle. The VersaTest motorised test stand was chosen as it gave the necessary repeatability and consistency independent of operator, which a manual stand could not.
Cosmetics brush pull-out testing
Our client is a major cosmetics company using a variety of brushes for all applications and wished to tensile test the integrity of the bristles. Gripping the awkwardly-shaped handles and bristle tips in a repeatable way, demanded more than a single standard vice grip...
Powdered drink container - Mecmesin's compressive strength & lid peel tests
An international supplier of a powdered hot-chocolate drink wanted to test several aspects of their packaging. The client was then able to use their Mecmesin universal tester for all four tests, with quick and easy exchange of fixtures, allowing rapid throughput of samples for testing.
Retort packaging 90 degree peel and lid strength testing
The food packaging industry has long had concerns about pinholes, flex cracks and leaks in the flexible materials and seals of retort flexible lidded packaging. A famous global food and drink maker needed to test the laminated retort (and other thin film) packaging solutions that protect products such as their popular microwaveable stir-in pots.
Battery terminal weld integrity tensile test
BMZ is one the largest European suppliers involved in the design and manufacture of specialist custom made battery systems for mobile power applications. As part of their production process, BMZ Poland in Gliwice needed to test the integrity of the welding on electrical connections fixed to each end of one of their rechargeable cells
- Bianka Cramblit
- Product Info
- Created 08 Jan 2021
- Modified 24 Mar 2021
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