Walk through supermarkets and specialty snack shops, and you’ll find more and more packaging bags that can “stand up” on the shelves: coffee beans, tea, nuts, and freeze-dried snacks are all switching to gusset bags. Although they are all flexible packaging, gusset bags create a three-dimensional volume through gussets on the sides or bottom, allowing them to be filled to capacity and displayed neatly. Compared to flat three-sided sealed bags, they appear more premium. This article doesn’t get bogged down in concepts; it clearly explains the differences between gusset bags and side gusset bags, what products each is suitable for, and what parameters to confirm before placing a custom order. If you want to understand the basic differences in bag types, you can refer to our previous article.Three-Side Sealing Bag ExplanationLet’s take a look.
What is a gusset bag? First understand its structure.
The core feature of a gusset bag is the inclusion of an inward-folded “accordion pleat” structure on the side or bottom of the bag. When empty, the accordion pleats fold together like an accordion, making the bag almost flat and compact for storage and transportation. Once filled with contents, the pleats naturally expand, transforming the bag from a flat sheet into a stable, standing three-dimensional container. This characteristic of being collapsible when empty and expandable when in use makes gusset bags exceptionally practical compared to other bag types.
From a structural perspective, a pleated pouch is mainly composed of three parts: the front, the back, and the pleated section. The width of the pleated section directly determines the actual capacity of the pouch: with the same pouch width and height, the wider the pleat, the more contents it can hold. During pouch formation, the pleated section is shaped by a dedicated folding mechanism, which requires high precision from the equipment. This is one of the reasons why pleated pouches are generally more expensive than three-sided sealed pouches. For brand owners, the additional cost is offset by the “three-dimensional presence” on the shelf and an improved user experience.
What is the difference between a gusset bag and a side gusset bag?
The so-called accordion bags commonly found on the market actually come in two types: bottom-accordion bags and side-accordion bags. Bottom-accordion bags feature an accordion pleat at the bottom, allowing the bag to stand upright after opening, with the bottom expanding into an M-shape. This type of bag is similar to a stand-up pouch but with a more square-sided profile, commonly used for packaging coffee beans, tea, and grains. Side-accordion bags have pleats on both sides of the bag body. When the bag is flat, the sides are folded inward, and when filled, they expand outward, offering greater capacity expansion. This type is often used for products like bread, baked goods, and bulk snacks that require “horizontal expansion.”
When choosing between the two, it mainly depends on the product and display method. For products that need to be displayed upright and emphasize the brand’s front side, the bottom gusset bag is the better choice. For products that require a large capacity and are often placed horizontally or hung for sale, the side gusset bag is more suitable. Compared to standard flat bags, both types of gusset bags offer higher space utilization, which is why they are referred to as the “most space-efficient bag type.”
Accordion bags are suitable for packaging a variety of products. Here are five typical applications:
Combined with the factory’s many years of sample-making and production experience, the gusset bag performs exceptionally well in the following five product categories: first, coffee beans and coffee powder. The gusset bag, paired with a one-wayVentilation valve, can be displayed upright and continuously release carbon dioxide, extending the tasting period; second, tea, including green tea, black tea, and pu’er tea, which have high requirements for barrier properties. The gusset bag can be combined with an aluminum foil layer to provide light blocking and moisture protection; third, nuts, fried snacks, and freeze-dried snacks. The bag has sufficient capacity and secure sealing, and after opening, it can be resealed with a zipper; fourth, bread and bakery products. The side gusset bag can neatly pack items such as toast and bagels; fifth, pet food and cat litter, which are heavy products. The gusset bag has more stable load-bearing performance compared to ordinary flat bags. It should be noted that the bag shape is only half of the packaging. The material combination is equally important. You can refer to the following.Stand-Alone Bag Material Selection GuideThe logic of the barrier layer.
To customize a pouch bag, which parameters need to be confirmed?
When customizing a accordion pouch for the first time, please carefully confirm the following parameters one by one: first, the accordion pleat width, which determines the capacity; it is essential to verify this with a physical sample. Second, the pouch structure—whether it is a bottom accordion or side accordion—must match the filling equipment and sealing method. Third, the material structure: whether it requires aluminum foil high barrier, whether it needs light blocking, and whether it can withstand freezing and low temperatures—these details should be clearly specified in advance. Fourth, the auxiliary functions: options such as vent valve, zipper, tear notch, and hanging hole will directly affect mold design and unit price. Clearly state the intended use, filling method, storage environment, and shelf life so that the factory can provide reliable material and structural recommendations.
Summary and Recommendations
The accordion bag uses a “expandable and collapsible” structure that integrates space utilization, display effect, and user experience. It is a bag type worth prioritizing when upgrading packaging for products such as tea, coffee, snacks, and baked goods. Before customization, determine the structure first, then the material, and finally confirm the accessories, which can save a lot of trouble. If you are looking for an accordion bag for your product, welcome to consult us.Contact Huashu PackagingPlease send us the product information and packaging requirements, and our engineering team will recommend suitable structural and material solutions for you.
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