| http://www.w3.org/ns/prov#value | - Suitable barrier webs (substantially gas impermeable) are composed of amorphous polyethylene terephthalate (APET) unplasticized polyvinyl chloride (uPVC) and/or a composite material, such as a biaxially oriented polyester/tie/polyvinylidene chloride/tie/polyethylene or any combination thereof.
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