A Sewn Open Mouth (“SOM”) multi-wall paper bag is a common industrial packaging style designed for a wide variety of dry flowable products. The SOM bag is an open mouth bag that is closed using sewing thread.
Open mouth bags are packed on equipment that deposits material into the bag via hopper or vertical filling spout. The bottom of the bag is pre-closed by the bag manufacturer. Once the bag is filled, the flush cut open end of the bag is sewn closed by the user. Sewn open mouth bags can be equipped with an easy-open pull tape feature to quickly open the bag and discharge its contents.
SOM bags, a cost-effective and durable solution for various applications, are one of the oldest multi-wall bag constructions on the market. They are compatible with both manual and fully automated packing equipment.
When packaging a wide range of free-flowing products, such as animal feed, rice, seed, and fertilizer, a gross weight open mouth bagger operating under a control hopper is often the ideal solution. This type of bagger is specifically designed to handle dry, granular materials that flow easily and consistently.
An operator places an empty bag on a conveyor that transitions to the filling mechanism. The bag's mouth is presented manually or automatically on the fill spout and filled until it achieves the desired weight. The filled unclosed bag then transfers to a sewing head where it can be manually or automatically fed through the sewing head. Once the bag is closed it will transition to the pallet for shipping.
Used with larger size material that won’t leak out between stitches. Options include 1 thread (generally with portables) or 2 threads (fixed heads, high speed applications).
Reduces major leaking.
Allows quick opening of sewn bags.
Traditional Kraft Paper | High Performance Extensible Paper |
---|---|
Manufactured from short wood fiber | Manufactured from long wood fiber |
Heavy, coarse sheet | Smooth sheet |
Strength through high basis weight | Strength through superior stretch and flexibility |
Limited stretch | 6-7% stretch |
Low levels of porosity | High levels of porosity |
Limited energy absorption | Superior energy absorption |
Ideal for 3-4 ply bag construction | Ideal for 2 ply bag construction |
Need a custom size, style, and print? We offer fully customized open mouth bag options for your business. Our range of bag styles include:
Minimum order quantities and artwork charges may apply. Lead times vary between 4 and 16 weeks depending on bag style.
For customers needing bags immediately, we maintain a substantial inventory of off-the-shelf printed and plain bags.
SOM bags are designed to package a wide variety of dry, flowable industrial and agricultural products, such as animal feed, rice, seed, and fertilizer. They are a durable and economical option for many applications.
SOM bags are filled through a hopper or vertical filling spout. Once filled, the open end of the bag is sewn closed manually or automatically using sewing thread. An optional EZ-open pull tape can be added for easy access to the contents.
SOM bags offer several closure options, including plain sew, plain sew with bag top fold-over, and tape sew with an EZ pull tape. These options cater to different product types and leakage prevention needs.
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