Learn about center seal pillow pouches: continuous longitudinal rear fin seam, horizontal end seals, hydraulic shock resistance, and snack packaging efficiency.

Quick Answer

A center seal pouch (commonly called a pillow bag) is a flexible pouch made by wrapping a single web of barrier film into a tube, creating a longitudinal fin or overlap seal down the center of the back panel, and closing the top and bottom with horizontal cross-seals. It is the packaging industry standard for automated, high-speed vertical form-fill-seal (VFFS) operations.

Essential Key Points

Vertical center fin seam down the rear panel provides high burst strength.
Symmetrical pillow expansion distributes internal hydraulic shock when cartons drop.
Most economical flexible packaging format per unit area of barrier film.
Pactrum stocks 12 standardized SKUs (L070–L081) in S12-12-50 and S12-12-30 barrier structures.

Comparison Overview

Pactrum Dimension	Dimension (mm)	Barrier Structure	Tensile Grade	Common Uses
5 × 7 in	130 × 180 mm	Transparent / Metallised	S12-12-50 / S12-12-30	50g – 100g namkeen, fryums, snacks
6 × 8 in	150 × 200 mm	Transparent / Metallised	S12-12-50 / S12-12-30	100g – 200g chips, extruded snacks
7 × 9 in	180 × 230 mm	Transparent / Metallised	S12-12-50 / S12-12-30	250g pulses, lentils, whole spices
8 × 10 in	200 × 250 mm	Transparent / Metallised	S12-12-50 / S12-12-30	500g bulk snacks, specialty flours

The Global Standard for High-Volume Snacks

Walk down any grocery aisle and you will find center seal pillow pouches containing potato chips, namkeen, roasted lentils, and dry grains. Its balance of low film consumption and high production speed makes it unmatched for commodity goods.

Burst Strength & Impact Distribution

When master cartons are transported across bumpy highways, stacked pouches experience immense mechanical stress. Center seal pouches flex into rounded pillows, evenly dissipating hydraulic shock across the entire surface area without blowing out the corner seams.

CATALOGUE DISCOVERY

Recommended Center Seal Pouches

Standardized specifications relevant to What Is a Center Seal Pouch?.

View all 81 SKUs

L070

Transparent

5 × 7 in Transparent Center Seal Pouch

5 × 7 in

₹2.40/pc

In Stock

L071

Metallised

5 × 7 in Metallised Center Seal Pouch

5 × 7 in

Made to Spec

Custom

Request Quote

L072

Transparent

6 × 8 in Transparent Center Seal Pouch

6 × 8 in

Made to Spec

Custom

Request Quote

Frequently Asked Questions

Can center seal pouches be filled manually?

Yes. Pre-formed center seal bags with an open top can be hand-filled or bench-funnel-filled and sealed using a standard impulse heat sealer.

What is the difference between S12-12-50 and S12-12-30?

These structural designations indicate the film thickness and laminate specification: S12-12-50 features a heavier inner sealant layer (50-micron LLDPE) for heavier products, while S12-12-30 uses a 30-micron sealant for lighter snack products.

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