Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

DuPont at Interpack 2014: TripleBubble®1 technology and advanced packaging polymers improve shrink and lidding film structures

13.05.2014

Kuhne Anlagenbau of Sankt Augustin, Germany, and DuPont have brought together Kuhne’s TripleBubble®1 water quenched and bi-oriented film technology and DuPont’s knowledge in high performance packaging polymers to explore new ways of saving costs and materials in multilayer shrink and lidding film applications.

•    With highly transparent films downgauged for a reduced environmental footprint, new shrink bag and film structures using DuPont™ Surlyn® are intended to provide a multitude of advantages over existing solutions, including advanced meat adhesion as well as excellent puncture resistance, so extending shelf life and minimizing food waste caused by packaging failure during transportation. 


Photo: DuPont/Kuhne

Merging Kuhne’s TripleBubble®1 Technology with DuPont’s resources in the application-specific development of high performance packaging polymers opens up new cost- and material-saving shrink bag solutions with excellent puncture resistance, so extending shelf life and minimizing food waste caused by packaging failure during transportation.

•    Initial laboratory results from testing new lidding film solutions using DuPont™ Appeel® as sealing layer as well as DuPont™ Bynel® as tie layer are demonstrating that combining TripleBubble®1 Technology and sophisticated DuPont packaging materials permits raw materials savings of up to 50% over conventional laminate structures, depending on the application, as well as energy savings, and consequently significantly improved life-cycle analysis results.

Shrink bags with advanced properties

TripleBubble®1 shrink films typically consist of a PET or PA based outer layer, a structural layer based on DuPont™ Surlyn® and a PE based seal layer, and can be enhanced with an EVOH or PVDC based barrier structure. Here, the partially crosslinked thermoplastic ionomer Surlyn® is key to their high shrink, softness and perforation resistance. A new joint development from Kuhne and DuPont is the combination of conventional shrink film technology using Surlyn® as shrink layer with an advanced sealing technology, where Surlyn® is used also as sealant. This approach opens up new horizons in shelf life and product presentation.

By far the most advanced and most widespread application of such shrink films is the production of shrink bags, used to transport meat on the bone from the slaughterhouse to retailers or restaurants. A fast-emerging new trend is to use shrink bags for supermarket consumer packaging, the reason being that such films adhere tightly to the meat without any protruding edges and improve colour, odour and meat texture. What’s more, compared with the tray-and-lid solutions weighing around 14 g that they replace, shrink bags for retail applications only weigh 4 g and can thus significantly improve the sustainability of supermarket meat packages.

To support this major industry trend, DuPont and Kuhne have recently focused their joint development on using new, dedicated Surlyn® grades to further optimize the shrinking and sealing performance of TripleBubble®1 shrink bag and barrier shrink bag structures. Used not only as shrink layer but also as sealant layer, these new grades open up new routes to novel, appealing and sustainable structures featuring a superior balance of puncture resistance, flexibility, softness, seal performance, transparency, and shrink behaviour. In particular, the use of Surlyn® for food contact layers in shrink bag applications has resulted in improved transparency, meat adhesion and colour as well as reduced drip and odour development. 

Lidding films with controlled thermal stability

A further focus in the ongoing collaboration between Kuhne and DuPont is on downgauging of strong coextruded and bi-oriented high performance films with controlled thermal stability for lidding applications. Current developments include films with up to eleven and in future even 13 layers of functional polymers, including DuPont™ Surlyn® ionomers or DuPont™ Appeel® resins as sealing components for peelable, easy-open packaging solutions as well as application specific DuPont™ Bynel® adhesive resins as tie layers which remain highly effective even after stretching and relaxation. 

The TripleBubble®1 technology significantly enhances the mechanical properties of such films due to the high level of molecular orientation brought about by biaxial stretching. Thermal relaxation which occurs in the third bubble of the process, where film shrinkage is reduced to a controlled value, is a particular challenge. Here, the effectiveness of the tie layer, which bonds incompatible functional layers of the structure together, is of major significance for producing high tear and puncture resistant films which are nevertheless comparatively thin.

In a first stage of their joint development, DuPont and Kuhne have investigated the effects of tie layers offering good adhesion between PET and polyolefins such as PE, PP or ionomers, between PO and PA and between PA and the heat-sealing layer. As a result, DuPont has developed a standard tie layer range, providing resistance during the production process, matching the viscosities of other polymer types used and adhering well to the two substrates during orientation and after thermal relaxation. This range includes DuPont™ Bynel® 21E787 and 22E780 which are suitable for PET/PO or 41E687 which is suitable for PA/PO, with optimization for other fields of application still underway.

Kuhne’s TripleBubble®1 Technology …

… is dedicated to the production of bi-oriented blown films for advanced food packaging applications, including meat, sausages and cheese, providing advantages such as high oxygen barrier. Since 1996, when Kuhne first developed this technology, the company has continuously extended its product portfolio, which today ranges from high-speed mono-systems for sausage casings with production speeds of up to 300 m/min, via medium width co-extrusion systems for multi-layer food packaging films, up to large size systems for film widths of up to 1.9 m, providing extremely high barrier and mechanical properties.

A standard feature of all TripleBubble®1 Systems is quenching of the first bubble using water chilled to 4 to 6 °C. This water quench technology was developed for the TripleBubble®1 process by Kuhne in 1996 to permit significantly higher cooling rates compared to other production processes, so preventing the development of crystallinity in the film and enabling a uniform downstream orientation process. In 2008, this concept for the production of water quenched blown films was extended to produce films of up to eleven layers. Moreover, TripleBubble®1 technology has recently been further developed to include up to 13 layers and large film widths and outputs of over 1 tonne per hour and to convert all common raw materials including PE, PP, PET, PS, PA, EVOH, COC, EVA, EMA, ionomers and more.

The engineering company Kuhne Anlagenbau GmbH, a member of the Kuhne Group, is dedicated to developing specific blown film technologies for the production of high-tech films for the food processing industry, the medical sector and demanding industrial applications. Kuhne achieves this by developing and optimizing specific machine technologies, mature finished products (films) for flexible packaging manufacturers, specially tailored raw materials in collaboration with raw material manufacturers as well as products and processes in collaboration with customers and research institutes.

DuPont Packaging & Industrial Polymers manufactures an extensive mix of adhesive, barrier, peelable lidding and sealant resins and provides a globally networked development team to work with customers on packaging programs that help protect the product, environment; improve shelf appeal, convenience; and reduce cost in the food, cosmetics, medical products and other consumer goods and industrial packaging industries.

DuPont (NYSE: DD) has been bringing world-class science and engineering to the global marketplace in the form of innovative products, materials, and services since 1802.  The company believes that by collaborating with customers, governments, NGOs, and thought leaders we can help find solutions to such global challenges as providing enough healthy food for people everywhere, decreasing dependence on fossil fuels, and protecting life and the environment.  For additional information about DuPont and its commitment to inclusive innovation, please visit (www.dupont.com).

1is a registered trademark of Kuhne Anlagenbau GmbH.
The DuPont Oval, DuPont™ and all products denoted with ® are registered trademarks or trademarks of E. I. du Pont de Nemours and Company or its affiliates.

PIP-Interpack-2014-03

Contact:
DuPont de Nemours International Sarl. 
Nilgun Turan
Marketing Communications Manager, Europe
Packaging & Industrial Polymers
Phone: +41-22-717-5497, Mobile: +90-530-5669883
Nilgun.Turan@dupont.com

Nilgun Turan | Konsens PR GmbH

Further reports about: DuPont PET Surlyn® Technology materials properties resistance shrink structures

More articles from Trade Fair News:

nachricht New Process Technology Unlocks Boost in Laser Productivity
18.05.2017 | Fraunhofer-Institut für Lasertechnik ILT

nachricht OLED microdisplays as high-precision optical fingerprint sensors
09.05.2017 | Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP

All articles from Trade Fair News >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Strathclyde-led research develops world's highest gain high-power laser amplifier

The world's highest gain high power laser amplifier - by many orders of magnitude - has been developed in research led at the University of Strathclyde.

The researchers demonstrated the feasibility of using plasma to amplify short laser pulses of picojoule-level energy up to 100 millijoules, which is a 'gain'...

Im Focus: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

New insights into the ancestors of all complex life

29.05.2017 | Earth Sciences

New photocatalyst speeds up the conversion of carbon dioxide into chemical resources

29.05.2017 | Life Sciences

NASA's SDO sees partial eclipse in space

29.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>