VIDEPAK Sewn Open Mouth Bags: A Practical Guide to Stronger, Smarter Industrial Packaging
Industrial packaging looks simple until the bag reaches a real production line. A bag must open correctly, accept the product quickly, survive filling impact, close securely, move over conveyors, stack without constant correction, protect the contents through storage and transport, and still arrive looking professional. For dry bulk products, these demands explain the long-lasting value of VIDEPAK sewn open mouth bags: a straightforward bag format supported by carefully engineered polypropylene woven fabric, flexible closure choices, optional barrier layers, and highly customizable dimensions.
Often known as SOM PP Woven Bags, the format combines three ideas that industrial buyers understand immediately: a strong woven body, a wide filling opening, and a closure that can be sewn after filling. The concept is simple. The engineering behind it is not. Fabric weight, tape strength, weave density, coating, liner, gusset geometry, seam design, surface friction and printing must work together instead of being specified as separate features. VIDEPAK therefore approaches every SOM project as a complete packaging system rather than treating the bag as an interchangeable commodity.
VIDEPAK PRODUCT PRINCIPLE: The best sewn open mouth bags are not automatically the heaviest bags or the most complicated bags. They are the bags whose woven structure, opening, closure, barrier, graphics and logistics performance match the packed product. Strong where strength is needed. Simple where simplicity works. Protected where the supply chain demands protection.
VIDEPAK was founded in 2008 and today reports more than 500 employees, exports to more than 70 countries, and company-wide production capability of up to approximately 800 million industrial bags per year. Its PP woven product range is made with virgin polypropylene, while size, capacity, surface construction, opening, bottom, liner and printing can be customized around different products and filling conditions. For global buyers evaluating a long-term manufacturer, this combination of production scale and specification flexibility matters because repeatability is just as important as the first approved sample.
What Are Sewn Open Mouth Bags and Why Does the SOM Format Work?
At the structural level, sewn open mouth bags are pre-made sacks with a fully open mouth that gives the filling equipment broad access to the inside of the package. In a typical PP woven construction, the bag body is prepared before delivery, including the required bottom construction, while the upper sewn open mouth remains available for filling. Once the target weight is reached, the upper edge can be prepared and sewn according to the selected closing system. This gives the customer a familiar sequence: open, fill, settle, close, inspect and palletize.
That sequence is the reason the abbreviation SOM matters. SOM stands for “sewn open mouth,” but in purchasing language it describes much more than the final stitches. It describes how the entire package interacts with the filling operation. A wide opening can handle materials with very different flow characteristics, while sewing provides a closure method that can be adapted to manual, semi-automatic and suitably configured higher-output operations. For plants that do not need a valve-filling format, SOM PP Woven Bags provide a direct and flexible route from empty sack to closed package.
What SOM Means on a Real Filling Line
The practical strength of SOM is freedom at the point of filling. Granules can fall through the full opening without being forced through a small valve. Coarse materials can enter quickly. Products with irregular particle shapes can be handled without requiring a complex filling interface. The operator or filling system has a clear opening to work with, while the woven body can be designed to remain flexible enough for filling but stable enough for handling.
This does not mean that every product should use the same sewn open mouth construction. A free-flowing grain may benefit from a relatively breathable woven structure. A fine powder may require a tighter weave, coating, improved seam design or PE liner to control sifting. A moisture-sensitive fertilizer may require additional barrier protection. A retail-oriented feed product may require laminated graphics and anti-slip treatment as well as mechanical strength. One opening style can therefore support many different packaging strategies.
Buyer Alert: Do not specify sewn open mouth bags only by “25 kg,” “50 kg,” or another fill weight. Two products with the same net weight can require very different bags because bulk density, particle shape, dust level, moisture sensitivity, filling speed, pallet pattern, transport distance and storage climate all influence the correct structure.
The Anatomy of VIDEPAK SOM PP Woven Bags
The main body of VIDEPAK SOM PP Woven Bags is produced from polypropylene tapes woven in two directions. This woven grid is fundamentally different from a simple unsupported film. The warp and weft tapes share mechanical loads across the surface of the bag, helping the package resist the pulling, dragging and repeated movement common in industrial logistics. At the same time, designers can adjust fabric mass, tape characteristics and weave density to balance strength, stiffness, air release and cost.
Polypropylene also gives the manufacturer useful design freedom. The woven shell can remain uncoated where breathability is important, receive a coating when greater surface protection and leakage control are needed, accept a PE liner when moisture or fine-powder containment becomes more important, or be laminated with a printed film when stronger graphics and additional surface protection are required. In other words, the woven body is the skeleton; coatings, liners and laminations are tools selected around the job.
A particularly important distinction concerns water protection. Plain woven polypropylene has useful resistance to everyday moisture exposure, but the small spaces between woven tapes mean that an untreated woven sack should not automatically be described as a complete moisture barrier. When stronger protection is required, VIDEPAK can change the package system through coating, lamination or a separate PE inner liner. The decision should be based on the packed product and route, not on a generic claim that every PP woven bag is “waterproof.”
Engineering VIDEPAK SOM PP Woven Bags Around the Product
A professional manufacturer should be able to explain why each specification exists. More GSM may increase material reserve and stiffness, but simply adding weight is not always the best answer. A tighter weave can help control fine particles, yet it may change air release. A liner can improve moisture and dust protection, yet the liner must be sized and positioned correctly for the filling process. A laminated surface can deliver clearer branding and extra protection, yet pallet friction and handling must still be considered. Packaging design is a chain: changing one link can affect several others.
Typical Parameters for Sewn Open Mouth Bags
VIDEPAK publishes broad commercial PP woven bag ranges together with more focused engineering references for SOM PP Woven Bags. These figures are useful starting windows rather than fixed promises for every application. VIDEPAK’s broader PP woven range includes common load capacities from approximately 5 kg to 50 kg and customizable dimensions extending from about 40 × 60 cm to 120 × 180 cm. More focused SOM references place many transport-sack constructions around 55–85 GSM, while the wider PP woven portfolio can extend to heavier options up to approximately 150 GSM.
The table should therefore be read as a design map, not a menu to copy line by line. A 5 kg branded specialty product should not automatically use the construction chosen for a 50 kg mineral. A light but abrasive granular product may create a different risk from a dense, smooth product. Likewise, a bag shipped directly from factory to a nearby warehouse faces a different route from one that will spend weeks in a container and then enter humid storage. VIDEPAK develops sewn open mouth bags by connecting the parameter to the risk.
SPECIFICATION RULE: “Stronger” should never be the complete purchasing instruction. Define what the SOM PP Woven Bags must resist: filling impact, powder leakage, abrasion, humidity, sunlight, pallet movement, repeated lifting, print rubbing, or a combination of these conditions. Measurable risk produces a better specification than a vague adjective.
From the Sewn Open Mouth Edge to the Final Closure
The opening and closure deserve special attention because an excellent woven body can still become a weak package when the closing method is poorly matched to the product. VIDEPAK’s PP woven range can support plain sewing, fold-over stitching, fold-over stitching with tape and heat-assisted taped configurations, depending on the bag structure and application. Reinforcing or covering the seam can also be useful where the buyer is trying to control fine-particle sifting or improve the appearance and stability of the closure.
For this reason, the word sewn open mouth should lead to a conversation rather than end one. What thread and seam configuration will the customer’s equipment use? Will the mouth be folded before sewing? Is a tape required? How much headspace is needed above the product? Does the package need an easy-open function at the destination? How sensitive is the product to small leakage paths? A capable manufacturer studies these questions before production because the top closure participates in both containment and customer experience.
Wide Filling Mouth
Simple product entry and flexible compatibility with many dry-bulk filling operations.
Woven Strength
Interlaced PP tapes create a strong, lightweight load-bearing structure.
Flexible Protection
Coating, lamination and liners can be added when the product demands more protection.
How a Professional Manufacturer Builds Consistency Into SOM PP Woven Bags
The performance of SOM PP Woven Bags starts long before the finished sack reaches the sewing area. Polypropylene resin must first be converted into a controlled sheet and then slit into tapes. Those tapes are drawn to orient the polymer structure and create the mechanical characteristics needed for weaving. Balanced tapes are then interlaced into woven fabric under controlled loom conditions. When upstream variation is controlled, downstream bag-making becomes more stable; when upstream variation is ignored, extra material cannot always repair the problem.
After weaving, the fabric follows the finish selected for the project. A basic industrial bag may use direct printing. Other sewn open mouth bags may receive a coating for improved surface characteristics, a laminated printed film for stronger visual presentation, a liner for enhanced containment, or a combination designed around a specific product. The fabric is then converted to the required dimensions, gussets or other features are formed when specified, and the bottom construction is completed before finished-bag inspection.
VIDEPAK SOM PRODUCTION FLOW
Resin Check
Material consistency
→
Extrusion
Sheet and tape forming
→
Drawing
Tape orientation
→
Weaving
Stable fabric
→
Finishing
Coat, print, line and cut
→
Conversion & QC
Bag-making and validation
This connected process is important because quality cannot be inspected into a bag only at the final stage. Resin consistency affects tape consistency. Tape consistency affects weaving. Weaving affects the behavior of coatings and laminations. Converting controls finished dimensions. Seam construction affects containment. Printing affects identification and market presentation. A professional manufacturer therefore controls the chain rather than focusing on a single laboratory value.
VIDEPAK states that virgin material is used for its main PP woven product range and describes batch inspection covering raw material and finished product performance. Its published quality-control information references an ISO 9001-based quality-management approach and testing according to relevant ASTM, EN and JIS methods, including tests such as impact, tensile and UV-weathering evaluations as required by the specification. ISO describes ISO 9001 as a framework for a quality management system focused on consistent processes, customer requirements and continual improvement; for industrial buyers, that process thinking is especially relevant when the same bag specification must be reproduced over repeated orders.
Why consistency matters: A bag does not create value simply because the first sample passes inspection. Real value appears when the tenth order behaves like the first: similar dimensions, similar fabric behavior, stable printing, predictable filling and a closure that continues to work with the customer’s process.
Where Sewn Open Mouth Bags Create Value and How to Choose the Right Manufacturer
The value of sewn open mouth bags becomes easiest to understand when the package is viewed by application. In agriculture, rice, grain, seed and similar dry products need reliable carrying strength, easy filling and bag structures matched to ventilation or moisture requirements. In fertilizer packaging, the challenge changes: moisture sensitivity, heavy handling and pallet stability can become more important. For fine powdered products, the main question may be sifting. For branded animal nutrition, the outer graphics may matter almost as much as the mechanical performance. The opening stays familiar; the engineering changes around the product.
Animal feed and pet nutrition demonstrate the dual role of SOM PP Woven Bags. The bag has to survive industrial handling, yet many finished packs also enter distribution channels where appearance affects the brand. Gussets can support a cleaner filled shape. Anti-slip surfaces can support more controlled pallet stacking. Printed lamination can improve visual clarity and reduce direct rubbing of protected graphics. A liner can be considered when moisture, odor or fine-particle control requires an independent inner barrier. The result is not “industrial versus attractive.” Properly specified SOM PP Woven Bags can be both.
Construction materials, mineral products and chemical dry goods bring another set of demands. Abrasion may be higher. Dust control may be more important. Packages may face stronger drop, drag and stacking forces. Here, buyers should examine the whole structure: tape and fabric strength, surface treatment, bottom construction, top closure, liner requirements and pallet behavior. For chemical applications, the material compatibility and applicable regulatory or safety requirements must also be confirmed for the specific packed substance rather than assumed from the general name of the bag.
Food-related dry goods require the same application-specific discipline. Virgin PP can be part of an appropriate food-contact packaging structure, but the final suitability of a bag depends on the resin grade, additives, inks, coatings, liners, intended food, contact conditions and destination-market requirements. Applicable documentation should therefore be confirmed during specification and approval. Regulatory systems such as U.S. food-contact rules contain specific conditions for polypropylene and other olefin polymers; “PP” by itself is not a substitute for verifying the complete finished packaging construction.
Choosing the right manufacturer therefore begins with information rather than price. Before quotation, the buyer should describe the product, including expected fill weight, bulk density, particle size, flow behavior, dust level and moisture sensitivity. Next comes the operation: filling equipment, filling speed, handling method, sewing arrangement and conveyor conditions. Then comes the journey: pallet pattern, stacking height, warehouse conditions, container shipping, outdoor exposure and destination climate. Finally comes the proof: dimensional tolerances, drop expectations, tensile requirements, leakage criteria, print requirements and any needed documentation.
BETTER RFQ = BETTER BAG: “Please quote 50 kg sewn open mouth bags” gives a manufacturer very little information. “Please design 50 kg SOM PP Woven Bags for a hygroscopic granular product, filled semi-automatically, container-shipped in a humid climate, stacked five layers high and requiring clean four-color branding” gives the engineering team a real starting point.
VIDEPAK’s role as a manufacturer is therefore not simply to convert polypropylene into sacks. The commercial goal is to connect the customer’s product with the correct woven structure, and then connect that structure with filling, closing, handling, transport and market presentation. This is why customization is central to modern sewn open mouth bags. Size can change. GSM can change. The bag can be flat or gusseted. The surface can remain woven or receive coating or lamination. A PE liner can be introduced. Anti-slip treatment or a transparent window can be considered. Printing can move from basic identification toward a stronger retail presentation.
Yet good customization is not the same as adding every available feature. More layers mean little when the product does not need them. Extra fabric provides little value when a better seam or better pallet geometry would solve the real problem. Premium graphics cannot compensate for poor filling behavior, and low unit price cannot compensate for leaking product, unstable pallets or frequent line stoppages. The most effective SOM package is often the one that uses the minimum complexity required to deliver reliable performance.
THE VIDEPAK VALUE EQUATION:
Sewn Open Mouth filling flexibility + engineered woven strength + appropriate closure + required barrier + stable pallet behavior + clear printing + controlled production = SOM PP Woven Bags designed for the complete journey, not only for the moment of filling.
This systems view explains why sewn open mouth bags remain relevant even as industrial filling and logistics continue to develop. They begin with a familiar format, but they do not have to remain basic. The same SOM platform can serve straightforward commodity packaging or evolve into a highly specified package with gussets, liners, protected graphics, moisture control and pallet-stability features. It can prioritize economy. It can prioritize protection. It can prioritize presentation. Most importantly, it can balance all three.
For buyers, that balance is the real advantage of VIDEPAK SOM PP Woven Bags. The open mouth keeps filling practical. The PP woven body provides an efficient strength platform. The closure can be matched to the operation. Optional layers can address real protection needs. Custom graphics can turn an industrial sack into a visible brand asset. Behind those features, the manufacturer must keep dimensions, materials, weaving, conversion and inspection repeatable from one production run to the next.
VIDEPAK sewn open mouth bags are therefore best understood not as “just woven sacks,” but as configurable industrial packaging tools. Share the product. Define the filling line. Describe the logistics route. Identify the risks. Then build the package around those facts. That approach produces something more useful than unnecessary thickness and more durable than a low-price specification: a sewn open mouth solution designed to fill smoothly, close reliably, travel securely and represent the product professionally from the production line to the final customer.