Bag-in-box containers are commonly used for the delivery of liquid products. It contains a bladder or a plastic bag composed of low-density polyethylene (LDPE) that sits inside the fiberboards. Bag-in-box is made from a variety of materials, including low-density polyethylene, ethylene vinyl acetate, and ethylene vinyl alcohol. This container is used for liquid foods, food and beverages, home items, and alcoholic and non-alcoholic beverages. Bag-in-box packaging is extremely dependable since it lowers packaging waste, provides chemical resistance, and acts as an oxygen and moisture barrier.
Bag-in-box container has many common commercial applications. Among the most common ones are to supply syrup to soft drink fountains and to dispense bulk supplied condiments such as ketchup or mustard in the foodservice industry (especially in fast food outlets). BiB technology is still used for its original application of dispensing sulfuric acid for filling lead-acid batteries in garages and dealerships. As explained further below, BiBs have also been implemented for consumer applications like boxed wine.
The consumer opens one end of the box (sometimes through a pre-scored opening) and connects a suitable connector to a built-in port on the bag to pump out the contents of a commercial syrup bag. The port itself features a one-way valve that opens only when pressure is provided from the connected connector, preventing the syrup in the bag from becoming contaminated. For consumer applications such as boxed wine, a tap already exists on the bag and protrudes through a pre-cut hole on the box, so the user just needs to identify the tap on the outside of the box.
Because of its inexpensive cost, BiB packaging is popular among manufacturers. BiB also assists the environment by allowing sizes ranging from 1.5 to 1000 litres, needing less packing and labelling. It is made of a lighter material than other plastic alternatives, which results in a lesser carbon footprint.
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