AR Metallizing use the brand name RotoFLEX® for our wet-strength paper line. In addition to different basis weights (grammages) there are other differences in our RotoFLEX® papers that usually are related to specific requirements of the end users. Usually the end users are breweries or wineries, but we also support a variety of different beverage producers (sparkling water brands, for example).
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The term 'wet-strength' itself indicates that the base paper before metallizing has been manufactured with a chemical that improves the bonding strength of the wood fibers when they have become completely wet in water. The wet strength chemical has little effect on properties of the paper when it is dry, but when wet the paper is stronger and resists breaking, tearing, and damage from rubbing. The most common way to measure the wet strength of paper is to test the tensile strength on an Instron-type machine, measuring strips when dry and also after soaking in water for five minutes.
How is barrier performance evaluated? In today’s #TechTipTuesday, we look at #OTR and #MVTR for #barrier #packaging. Packaging designed for food packaging applications need to restrict the flow of oil, water, oxygen, grease and moisture to #protect #contents and #prevent #food #spoilage. Packaging solutions that meet these requirements are known as barrier food packaging. But how do we evaluate the barrier performance of a packaging product? The industry currently uses two main measurements: Oxygen Transmission Rate, or OTR is a measurement of the amount of oxygen gas that passes through a substance over a given amount of time. To evaluate a packaging solution’s overall barrier performance, caps, heat seals and other closures need to be taken into account alongside the barrier material itself. Then there is Moisture Vapor Transmission Rate (MVTR), also known as Water Vapor Transmission Rate (WVTR), which evaluates the amount of water vapor that permeates a substance over a given time, acting as a measurement for the permeability of vapor barriers. Nissha Metallizing Solutions’ METIVO VB paper, which is designed for food contact, is particularly suited to flexible packaging applications, such as beverage powders, cereals and coffee. This paper offers MVTR barriers that maintain the product's performance even when folded. To find out more, get in touch with our team: https://lnkd.in/eeFX5Mcm
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