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Latex means environmentally friendly packaging
December 17, 2002For several years, Caisa Andersoon has been trying to create a better barrier against moisture and oxygen in our food packaging. On December 20, she will submit her doctoral dissertation at Karlstad University in Sweden.
Latex has long been used for various types of surface treatment of paper. In recent years, interest has been focused on the polymer's characteristic of forming a protective coating on the surface of paper.
"Surface treatment is used to create a barrier against moisture in food packaging. I test different coatings of paper with latex and find out which one yields the best results, what characteristics the barrier layer has. The aim has been to understand what underlying factors determine how a good barrier is formed," says Caisa Andersson.
Coating of paper and cardboard with latex has several advantages compared with coatings of polyethylene, which has dominated until now. A latex film renders the packaging simple to recycle or compost. Another advantage is that the package's seams can easily be fused shut without having to glue the edges.
Caisa Andersson is a member of a research team led by Professor Lars J'�rnström. She is one some 20 doctoral candidates involved in a national network for surface treatment research. The network includes, besides Karlstad University, the Lule'å University of Technology and industry-based research institutes.
With her dissertation Interaction between polymers in dispersion coating and surface sizing of paper and board, she will be the first candidate to receive a doctorate at the Department of Chemistry, Karlstad University.
Vetenskapsr�det (The Swedish Research Council)
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Experts discuss applying systematic review to the field of nutrition
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New study indicates smallpox vaccination effective for decades
Although naturally occurring smallpox was eradicated in 1977, there is concern that bioterrorists might obtain smallpox from a laboratory and release it into the population.
Adiponectin is a metabolic link between obesity and bone mineral density
Researchers at the University of Toronto, Faculty of Medicine, Toronto, Canada, have discovered that adiponectin, a protein secreted from adipocytes, is a metabolic link that can explain, in part, the known positive relationship between obesity and both bone mineral density and reduced susceptibility to fractures.
Bittersweet milestones
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Primary care provides patients with better outcomes at lower cost
A white paper, How is a Shortage of Primary Care Physicians Affecting the Quality and Cost of Medical Care?, released today by the American College of Physicians (ACP) documents the value of primary care by reviewing 20 years of research.
Study Investigates Non-Surgical Placement of a Gore-tex Type Device in the Heart to Stop Recurrent Strokes and Mini-Strokes
A study is under way at Rush University Medical Center using a small, soft-patch device made of a Gore-tex-type material - often used to make durable outerwear - to close a common hole found in the heart called a patent foramen ovale (PFO) in order to prevent recurrent strokes and transient ischemic attacks (TIAs) in adults.
Scientists Discover New Planet Orbiting Dangerously Close to Giant Star
A team of astronomers from Penn State and Nicolaus Copernicus University in Poland has discovered a new planet that is closely orbiting a red-giant star, HD 102272, which is much older than our own Sun.
Exercise increases brain growth factor and receptors, prevents stem cell drop in middle age
A new study confirms that exercise can reverse the age-related decline in the production of neural stem cells in the hippocampus of the mouse brain, and suggests that this happens because exercise restores a brain chemical which promotes the production and maturation of new stem cells.
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