Custom Metallized BIB Liners | 1–20L Butterfly Valve Pouches for Liquid Packaging

As the flexible inner liner of a bag-in-box system, this pouch is made from metallized laminate and is designed to sit inside a corrugated carton or other rigid outer case. Its metallized barrier limits light and oxygen exposure, which helps liquids such as juice retain their original taste. The bag uses four-side seals for a flat, durable shape. A butterfly valve is fitted as the standard outlet; spout fitments or alternative valves can be specified instead. Each valve is welded tightly to the bag, allowing smooth pouring or extraction. Valve placement, connector dimensions and bag format can all be matched to your filling equipment and outer box, making transport and storage easier.

Common laminate builds include PET/AL/PE and PET/VMPET/PE, and the metallized layer together with the inner heat-seal film can be tailored to the liquid being filled, so barrier strength and flex crack resistance stay in balance. Artwork is reproduced through 1–8 colour gravure printing, giving detailed image layers and dependable registration for brand graphics and product information. Available capacities span 1L to 20L. If you prefer to make bags on your own machine or fill in-line, matching roll film made from the same material can be supplied.

Typical applications cover juice, coffee concentrate, syrup, mineral water, edible oil and neutral liquid seasonings. These pouches suit beverage plants, restaurant chains and e-commerce brands. For customization, send a physical sample or artwork; once received, we confirm the material structure, valve model and print-ready file before producing a sample. Manufacturing takes place at our Dongguan, Guangdong factory, which includes a Class 10000 clean workshop. The MOQ for BIB bag-in-box pouches is 10,000 pcs, and production is scheduled according to order queue.