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Food industry focuses on better packaging and smarter process technology for less spoilage

date: 2017-07-25
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 Innovative packages are the key in the fight against food loss and wastage. More effective barrier layers, germicidal films and freshness indicators are intended to help products to keep for longer and halt consumers’ throwaway mentality. However, despite all these improvements, companies have to keep a constant eye on process efficiency and on costs. 
In the developing countries, one child in six is undernourished, which amounts to an absolute figure of 100 million. The United Nations (UN) estimates that undernourishment causes the deaths of 2.6 million children under five years old per year. This means that hunger is still one of the biggest scourges of humanity. 
Yet no one should have to go hungry. Every year some 1.3 billion tonnes of food worldwide ends up in the bin – a conclusion of the current report “Food Wastage Footprint: Impacts on Natural Resources” of the Food and Agriculture Organisation of the United Nations (FAO). If food losses were reduced by using food more prudently, famines could be curbed. 
54 per cent of wasted food, says the report, is lost during production, post-harvest treatment and storage. Particularly badly affected are the poorer countries of Africa and Asia where shortcomings during harvesting and logistics destroy 6 to 11 kg of food per capita each year. Exposed to heat, fruit and milk spoil, and meat is rendered inedible by contamination with dangerous germs. On the other hand, wastage during processing, transport and consumption is more a problem of the industrialised nations. In Europe and North America, some 100 kg of food is thrown away per person and year although it is still fit for consumption. Demands for a change of attitude are therefore coming from the highest authorities. At his general audience during World Environment Day last June, Pope Francis called for an end to consumerism and the wastage of food. 

 

 


Central theme of interpack 2014 
Industry has already got the message. According to a current study by the Royal Melbourne Institute of Technology in Australia, suitable packages are capable of reducing food loss considerably. Developers are therefore working hard on new concepts for packaging machines, the related process technology and “smart” packages. A total of 100 companies from the entire food value chain, from production, retailing and packaging through to logistics, are now participating in the SAVE FOOD Initiative, a joint project of the FAO, the United Nations Environment Programme (UNEP) and Messe Düsseldorf GmbH. Its goal is to foster dialogue between industry, research, the political sphere and civil society on the subject of food loss. Reducing spoilage will also be the central theme at the Innovationparc Packaging at interpack 2014 in Düsseldorf. Exhibitors at this special show will be presenting their ideas on how food can be protected better from 7 to 14 May 2014. Furthermore, during the SAVE FOOD Conference at Messe Düsseldorf’s Congress Center South on 7 and 8 May, experts from politics, industry and society will be exchanging views on food loss and wastage. 
The sector has a lot of work ahead of it. Farmers in Africa first have to be convinced that it is better to package their produce at source than to send it off unprotected. It is not high tech that is called for here, but education locally. Representatives of companies like Bosch, for example, therefore toured emerging and developing countries with mobile packaging machines some years back in order to demonstrate to farmers the advantages of packaged foods. 
The throwaway mentality of the Western world, on the other hand, is even more difficult to combat. According to a survey by Berndt + Partner management consultants, 20 to 25 per cent of food in Europe is binned even though it is still fit for consumption. One contributory factor is the “best before date” that has to be printed on all food packages. Once it is reached, food is often thrown away. However, “best before” does not mean that food is no longer edible after this date, but merely that its colour and consistency may change. The currently still widespread big packs exacerbate the problem. The best before date is often reached before the package contents have been consumed. 
Smaller, customised packages should help to solve the problem. “In our view, portioned packages for one-person households, for example, can help to stem food wastage,” says Christian Traumann, Managing Director of Bavaria packaging specialist MULTIVAC Sepp Haggenmüller. 
Creative package solutions 

 

 


Reporting continuously on a product’s state of freshness, time/temperature indicators are another approach in the battle against spoilage and waste. The useful thing about them is that they render visible any breaks in the cooling chain, for instance. BASF and the Swiss Freshpoint company are already producing labels containing a special pigment which are printed straight onto the package. The colour changes when the contents spoil. 
Research is also being conducted on active packages that interact with their contents. PET bottles are treated with oxygen absorbers like iron so that oxygen sensitive beverages such as beer and fruit juice keep for longer. Then there are films enriched with preservatives like sorbic acid that combat germ proliferation on foods. Critics claim that the additional chemicals on active packages impair the products’ natural quality. In their search for a remedy, scientists of the Fraunhofer Institute for Process Engineering and Packaging (IVV) in Freising, Bavaria, are developing antimicrobial materials based on plant extracts, e.g. from rosemary. “This way, food manufacturers can go further towards meeting the consumer’s wish for natural, health-promoting products,” says IVV materials developer Sven S?ngerlaub. 
The downside of many food-saving packages, however, is that they are relatively expensive to produce. If, for example, a “stronger” package calls for more material, it uses up more resources. The sector is therefore trying to offset the expenditure on “smarter” packages by economising elsewhere along the food value chain. The manufacturers of packaging machines therefore endeavour to boost the efficiency of their lines by increasing the degree of automation and optimising their processes. 
MULTIVAC, for example, offers its customers innovative technologies that ensure among other things that as little film waste is generated during production as possible, Marketing Manager Valeska Haux explains. This is achieved with the aid of advanced machine tools, she continues, citing cutting tools as examples. The integration of handling modules in the packaging line as well ensures package-by-package quality control for maximum consumer protection, says Haux. 
“We boost the efficiency and hygiene of our production lines and prevent waste arising during production,” explains Mathias Dülfer, Managing Director of Weber Maschinenbau. This company specialising in high-performance cutting machines is constantly refining its range of lines. In the latest machines, innovative blade technologies, intuitive operating concepts and an open design ensure ease of operation, good accessibility and inspectability, and simple cleaning. “All this helps to make production even more efficient, more reliable and hence more sustainable,” says Dülfer. 
Packaging foods more securely and with higher throughput – this is also the aim of Spanish machine manufacturer ULMA Packaging. The company covers all packaging technologies from tubular bag packages to deep-drawing machines. At interpack 2014, the Spanish company will be showing new deep-drawing systems for skin packages, among other things. The main function of this kind of packaging is to extend shelf life while also preventing liquid loss due to evaporation. This retards germ growth. 
ULMA has also developed a new control for all machine models with user-friendly software. The newly developed control promises “a huge boost to productivity on all systems”, the company claims. The innovations from the manufacturers demonstrate that a whole battery of packaging strategies for preventing food loss is already available. And that they can be realised on the industrial scale at acceptable cost thanks to on-going improvements in the efficiency of the production technology. At interpack from 8 to 14 May, food manufacturers will have the chance to see them for themselves. 

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