SUSPENDED U LINER BAG MACHINE

A Suspended U-Liner Bag Machine is a specialized FIBC liner-making machine used to produce suspended-type U liners — inner liners for Flexible Intermediate Bulk Containers (FIBCs), also called big bags or bulk bags.

Here’s a clear breakdown 👇

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🧩 1. What is a Suspended U-Liner?

A U-liner is a tubular or gusseted polyethylene (PE) liner shaped like the letter “U” that is inserted inside an FIBC bag to provide:

• Moisture protection

• Dust and contamination prevention

• Leak-proof performance for powders, chemicals, food, or pharmaceuticals

A suspended U-liner has its upper edges extended and fixed (suspended) to the FIBC’s body fabric or lifting loops — so the liner stays properly positioned inside the outer bag during filling, discharging, and handling.

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⚙️ 2. Function of a Suspended U-Liner Bag Machine

This machine automatically produces and seals the suspended U-liner from PE film rolls.
Typical operations include:

1. Film feeding – unwinds the PE roll.

2. Cutting – precise length cutting to form the U shape.

3. Folding – folds film into U structure.

4. Heat sealing – seals the edges or bottom.

5. Suspension tab forming – creates or seals hanging tabs/loops for attaching the liner inside the FIBC.

6. Discharge stacking – finished liners are collected for packing or FIBC insertion.

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🏭 3. Applications

Suspended U liners are used in:

• Chemical powder packaging

• Food-grade bulk materials

• Pharmaceutical ingredients

• Fine or hygroscopic materials

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⚡ 4. Advantages of Suspended Type

• Liner stays in position — no collapsing during filling

• Better filling accuracy and discharge efficiency

• Reduces contamination risk

• Easier for automatic FIBC filling systems