Ssuper Sack Liner

An inner liner in an FIBC Ssuper Sack provides a protective barrier that reinforces the bag and prevents moisture, contamination, and leakage. This added layer is essential for maintaining product quality, especially for fine powders, moisture-sensitive materials, or products that must remain clean. Meeting strict standards, including antistatic and food-grade regulations, these liners prevent leaks and sifting, ensuring the contents stay safe and intact during storage and transport.

  • High tensile strength

  • Anti static performance

  • Chemical resistance

  • Superior moisture barrier

  • Effective oxygen barrier

  • Food safe & hygienic

LINER MATERIALS

Low Density Polyethylene (LDPE)

FLEXIBILITY:  Highly flexible and stretchable.

BARRIER PROPERTIES:  Effective moisture barrier; moderate oxygen and aroma protection.

STRENGTH:  Lower tensile strength with  tear resistance.

APPLICATION:  Ideal for fine powders, food products, and flexible chemical packaging.

High Density Polyethylene (HDPE)

FLEXIBILITY:  Stiffer and less flexible than LDPE.

BARRIER PROPERTIES:  Excellent moisture barrier; moderate oxygen barrier.

STRENGTH:  Higher tensile and puncture strength.

APPLICATION:  Perfect for granules and sharp products needing moisture protection.

Ethylene Vinyl Alcohol (EVOH)

FLEXIBILITY:  Flexible when co-extruded with polyethylenes.

BARRIER PROPERTIES:  Excellent gas and oxygen barrier; moisture resistance adapts with PE

STRENGTH:  Robust; boosts multilayer structures.

APPLICATION:  Ideal for preserving freshness in oxygen-sensitive products like coffee and food powders.

Aluminum Foil

FLEXIBILITY:  Rigid. Paired with plastics for better handling.

BARRIER PROPERTIES:  Complete protection against light, oxygen, moisture, and gases.

STRENGTH:  Easily punctured; often reinforced with plastics.

APPLICATION:  Perfect for sensitive items like pharmaceuticals and moisture or light sensitive foods.

LINERS CONSTRUCTION

Inner liners are essential for packaging sensitive products, such as food-grade materials, pharmaceuticals, and fine powders, that require elevated hygiene standards and robust protection against environmental contaminants.

Tubular Liner

STRUCTURE:  Cylindrical in shape and fits loosely inside the FIBC bag.

USAGE:  Seamless along the sides, with only the top and bottom sealed or tied off.

PROHIBITED USE:  Not for hazardous goods or liquids.

 

3. Baffle Liner
Structure:
  • A baffle liner incorporates internal baffles—pieces of film welded or sewn at the corners of the liner.
  • These baffles allow the liner to maintain a square or rectangular shape even when filled, preventing bulging.
  • The liner can be tubular or gusseted, but the key feature is the addition of the baffles.
Common Uses:
  • Used when FIBC bags need to retain a cubic shape for stacking efficiency and space optimization.
  • Ideal for fine powders, chemicals, and food ingredients that need to be transported or stored in a more compact, stable format.
  • Common in industries where palletization and container space are critical.
Advantages:
  • Maintains bag shape, preventing bulging and deformation.
  • Improves stacking and storage efficiency.
  • Reduces transportation costs by allowing more bags to fit in a given space.
Summary Table
Tubular Seamless, cylindrical tube Powders, chemicals, food, pharma Simple, cost-effective, leak-proof
Gusseted Flat tube with side pleats Grains, powders, granules Better fit, maximizes space
Baffle Liner with internal baffles Fine powders, compact stacking needs Maintains shape, optimizes stacking
How These Formats Meet Packaging Needs
  • Tubular liners are chosen for simplicity and basic protection.
  • Gusseted liners suit applications where a better fit inside the FIBC is needed, reducing wasted space and improving product stability.
  • Baffle liners are preferred for high-value or space-sensitive applications where maintaining the FIBC’s cubic shape is essential for logistics and storage.
Selecting the right inner bag format ensures optimal product protection, efficient logistics, and compatibility with specific industrial requirements for FIBC bags.

Gusseted Liner

STRUCTURE:  A flat tube with side pleats that allow it to expand when filled.

USAGE:  more form-fitting liner suitable for grains, powders, or granules.

ADVANTAGES:  Reduce liner movement and maximise space utilisation within the FIBC Ssuper Sack.

 

3. Baffle Liner
Structure:
  • A baffle liner incorporates internal baffles—pieces of film welded or sewn at the corners of the liner.
  • These baffles allow the liner to maintain a square or rectangular shape even when filled, preventing bulging.
  • The liner can be tubular or gusseted, but the key feature is the addition of the baffles.
Common Uses:
  • Used when FIBC bags need to retain a cubic shape for stacking efficiency and space optimization.
  • Ideal for fine powders, chemicals, and food ingredients that need to be transported or stored in a more compact, stable format.
  • Common in industries where palletization and container space are critical.
Advantages:
  • Maintains bag shape, preventing bulging and deformation.
  • Improves stacking and storage efficiency.
  • Reduces transportation costs by allowing more bags to fit in a given space.
Summary Table
Tubular Seamless, cylindrical tube Powders, chemicals, food, pharma Simple, cost-effective, leak-proof
Gusseted Flat tube with side pleats Grains, powders, granules Better fit, maximizes space
Baffle Liner with internal baffles Fine powders, compact stacking needs Maintains shape, optimizes stacking
How These Formats Meet Packaging Needs
  • Tubular liners are chosen for simplicity and basic protection.
  • Gusseted liners suit applications where a better fit inside the FIBC is needed, reducing wasted space and improving product stability.
  • Baffle liners are preferred for high-value or space-sensitive applications where maintaining the FIBC’s cubic shape is essential for logistics and storage.
Selecting the right inner bag format ensures optimal product protection, efficient logistics, and compatibility with specific industrial requirements for FIBC bags.

WHAT IS LDPE AND HDPE?

LDPE and HDPE are both members of the polyethylene family of plastics, but they differ significantly in their molecular structure and density, which affects their properties and applications.

LOW-DENSITY POLYETHYLENE (LDPE)

- Characterized by a highly branched molecular structure
- Lower density compared to HDPE, making it more flexible and pliable
- Commonly used for plastic wraps, grocery bags, and squeezable bottles

HIGH-DENSITY POLYETHYLENE (HDPE)

- Possesses a more tightly packed, mostly linear molecular structure with greater crystallinity
- Higher density than LDPE plastic, resulting in greater strength and rigidity
- Commonly used for items such as milk jugs, detergent bottles, and trash bags

BENEFITS OF LDPE AND HDPE PLASTIC BAGS

Both LDPE and HDPE plastic bags offer several advantages, making them widely used in the packaging industry:

LIGHTWEIGHT YET DURABLE

Plastic bags are much lighter than alternatives like paper or cloth, yet they provide impressive strength and tear resistance.

WATER RESISTANCE AND VERSATILITY

The hydrophobic nature of polyethylene plastics makes LDPE and HDPE bags resistant to water, making them suitable for packaging a wide variety of wet and dry products.

COST-EFFECTIVENESS

Plastic bags provide an economical packaging solution, especially when compared to more expensive alternatives.

RECYCLABILITY

LDPE and HDPE are recyclable plastics, making them a more environmentally friendly choice when disposed of properly.

CHOOSING THE RIGHT PLASTIC BAG FOR YOUR NEEDS

BAG THICKNESS & STRENGTH

Select the appropriate plastic bag thickness (gauge) based on the weight and characteristics of your contents to ensure adequate strength and durability.

BAG SIZE & DIMENSIONS

Choose the correct bag size and dimensions to properly accommodate your products and prevent overfilling or wasted space.

CLOSURE METHODS

Determine the most suitable closure method, such as adhesive, heat sealing, or zippers, to provide the desired level of security and ease of access.

PRINTING & BRANDING

Consider the type of plastic (LDPE or HDPE) and its effect on the quality and durability of custom printing if you require branded bags.