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A single source provider of flexible packaging and rigid tray packaging solutions, ProMach serves a variety of industries and applications. With numerous machinery installations worldwide and a vast portfolio of rugged and proven solutions, ProMach offers extensive experience handling a wide range of products in diverse conditions. ProMach consults with customers to identify the ideal package type to fit their unique application for each project, giving customers both choice and flexibility. Many of the world’s most successful brands use ProMach solutions to package their products into bags, pouches, sachets, stickpacks, trays, and more.
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ProMach is your partner from start to finish. Our product brands are grouped into distinct business lines that make the most sense to our customers, covering every function of the production line: Filling, Bottling & Capping, Decorative Labeling, Flexibles & Trays, Pharma, Handling & Sterilizing, Labeling & Coding, Robotics & End of Line, and Systems & Integration.
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3-Side Seal Pouch
The 3-side seal pouch is a flat, streamlined packaging format formed from a single web of film that is folded along one edge and sealed on the remaining three sides. The fold becomes the bottom or side edge of the finished pouch, while the three sealed edges provide containment on all other sides. After filling, the open end is sealed to close the package.
This construction gives the 3-side seal a naturally flat profile with a clean, uninterrupted surface on the fold side — making it well suited for applications where display transparency or a printed window panel is important. The fold side can be produced in a clear film layer, giving consumers a direct view of the product inside.HMC Products Pouchmaster systems support high-speed, consistent 3-side seal pouch production across a wide range of sizes and film structures. The format accommodates powders, granules, liquids, gels, and small flat solids, and is compatible with high-barrier laminates including foil, Mylar, and Tyvek combinations for demanding containment and sterility requirements.
Producers commonly choose the 3-side seal when compact sizing, high throughput, portion control, or sterile barrier performance are the top priorities.
Common Applications
Food & Beverage
- Coffee and tea sachets
- Single-serve condiments, sauces, and dressings
- Portion-controlled powdered mixes, drink additives, and seasonings
- Sugar, sweetener, and creamer packets
- Confectionery and candy in flat retail or foodservice formats
Pharmaceutical & Medical
- Sterile barrier packaging for medical devices and surgical instruments — a primary application for peel-open 3-side seal formats
- Bandages, gauze, wound care dressings, and disposable procedure accessories
- Unit-dose powder and granule sachets
- Examination and procedure kit components
- Sterile packaging for diagnostic test strips and lab consumables
Personal Care & Beauty
- Sheet masks and individual skincare treatments — the fold side provides a transparent display window
- Wet wipes, facial wipes, and disposable hygiene products
- Sample-size personal care products for retail kits and travel formats
Industrial & Specialty Products
- Electronic components requiring ESD-protective pouching
- Flat precision hardware and small parts
- Laboratory consumables and sterile diagnostic supplies
- Specialty chemicals in portion-controlled flat sachets
Key Advantages of the 3-Side Seal Format
- Formed from a single film web — efficient material use and simplified production geometry
- Clean fold edge on one side enables transparent display windows without additional film layers
- Flat, slim profile supports efficient case packing, kit assembly, and multipack integration
- Compatible with Tyvek, foil, and other high-barrier or sterile-barrier laminates
- Straightforward sealing geometry supports fast cycle times and consistent seal integrity at high speeds
- Ideal for peel-open configurations used in medical and cleanroom environments
Optional Features
- Tear notches for easy, controlled opening
- Peel-seal closures for sterile and medical applications
- Laser-scored or perforated openings
- Rounded corners for a refined retail appearance
- Euro slot or hang holes for peg display
- Printed or transparent window panels on the fold side
HMC Products Pouchmaster systems are engineered to support flexible 3-side seal pouch production across a wide range of sizes, film structures, and output requirements. As part of ProMach's Flexible Packaging Group, HMC Products delivers high-performance horizontal form-fill-seal equipment backed by expert service and long-term support. Contact HMC Products today to discuss your 3-side seal pouch application.