Aluminum-plastic composite valve pouch

Currently, valve bags are commonly used to package powdered materials weighing between 20 kg and 50 kg. Traditionally, these valve bags were made exclusively from paper; however, with the continuous emergence of new materials, increasingly stringent requirements have been placed on packaging valve bags. Conventional paper valve bags suffer from limited strength, single‑purpose performance, short shelf life, and an unattractive appearance, making them inadequate for meeting the moisture‑proofing and sealing demands of modern materials. To address the shortcomings of existing paper valve bags, a new type of valve bag for powdered materials has been developed. This valve bag offers excellent sealing, high mechanical strength, broad applicability, and an extended shelf life, making it suitable for packaging a wide range of powdered substances. It comprises…

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Valve bag

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　　Currently, valve bags are widely used for packaging powdered materials in quantities ranging from 20 kg to 50 kg. Traditionally, these valve bags were made exclusively from paper; however, with the emergence of new materials, increasingly stringent requirements have been imposed on valve bags used for containment. Conventional paper valve bags, limited in strength, offering only single‑purpose performance, having a short shelf life, and lacking aesthetic appeal, can no longer adequately meet the moisture‑proofing and sealing demands of modern materials.

　　Valve bags for powder materials address the shortcomings of conventional paper valve bags, offering a solution that delivers excellent sealing, high strength, broad applicability, and an extended shelf life, making it suitable for packaging a wide range of powdered substances. The bag comprises a body and a valve opening; its robust body is constructed from high‑strength composite materials, such as a multilayer co‑extruded PE film or an aluminum‑plastic composite film. A one‑way vent valve is integrated on the valve‑side of the bag. Key features include superior sealing performance, versatile compatibility, and suitability for various powder materials.

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PE valve bag

Aluminum-plastic composite valve pouch

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