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This is generally of monofilm or paper of different weight with analine adhesives that have the property of cold welding, simply with the pressure, giving the opening a peel-off effect. You use these film/cards where it is not provided or is not allowed to have a heat sealing of packaging. Using adhesives already widely used in the areas biomedical/pharmaceutical and food and are also available with adhesives Latex-Free, i.e. with total absence of natural latex.