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TheCardboardBoxes offers 3 Side Seal Pouches that provide a clean, professional look for retail and food packaging. Our pouches are sealed on three sides for tight, secure closure. Print your logo, product info, and brand designs with vibrant full-color inks. Available in clear, matte, gloss, and Kraft finishes with tear notches and resealable zippers. Perfect for snacks, samples, and small retail items. Order 3 Side Seal Pouches from TheCardboardBoxes with low minimums.
Not every product needs a gusseted base or a complex closure system. Sometimes you want a simple, flat pouch with a clean seal on three sides and an open top for filling. That's exactly what a 3 side seal pouch delivers, and it's one of the most versatile formats in flexible packaging.
Also called a three-side seal bag or flat pouch, this format is widely used in food, pharmaceutical, cosmetic, and supplement packaging. It's clean, printable, cost-effective, and available in a wide range of materials.
The name describes the construction exactly. Three sides of the pouch are sealed during manufacture: both long sides and the bottom. The open top is where the product goes in, and it's then sealed by the packer using heat or a zip lock closure after filling.
This gives you a flat, rectangular pouch with no gusset. The result is a slim profile that's easy to stack, display on a peg hook, or tuck into a box. It's one of the most common formats in blister-alternative pharmaceutical packaging, single-serve food items, and sample sachets.
Three-side seal pouches are made from a range of laminate film structures depending on the barrier properties required:
- PET/PE: light, flexible, good for low-barrier applications
- PET/Foil/PE: full aluminium barrier for food, pharmaceutical, or moisture-sensitive products
- OPP/PE: cost-effective for snacks and dry goods
- Kraft/PE or Kraft/Foil/PE: for an eco-influenced natural aesthetic
- Transparent or clear film options for product visibility
Food-grade inner layers are standard for any food contact application.
Sachets are the classic application for three-side seal pouches. Instant coffee, sugar, salt, condiment sachets, shampoo samples, and pharmaceutical powder sachets all use this format. The slim profile means they can be packed into gift boxes, placed inside larger retail packages as inserts, or hung on retail display strips.
In the snack food industry, flat pouches are used for nuts, seeds, dried fruit, and energy chews where a stand-up format isn't needed. For supplement brands, single-serve protein or vitamin sachets in this format are extremely popular.
Medical device companies use three-side seal pouches for sterile product packaging. They're also standard in the automotive and electronics sectors for component protection.
The flat surface of a three-side seal pouch is ideal for printing. The front and back panels offer clean, uninterrupted print areas without the distortion you sometimes get on gusseted bags at the corners. This makes high-detail printing, fine text, and complex colour work easier to execute.
Full-colour digital printing is available for short to medium runs. Flexographic printing suits larger volumes. The choice of film material affects print quality: PET outer layers typically give the best colour reproduction.
Finishes include gloss, matte, soft-touch, and clear. Spot varnish can highlight specific design elements. Metallic inks work well on these flat surfaces.
For single-use products, the top is heat-sealed after filling. For resealable applications, you can add:
- A zip lock strip below the tear notch
- A pressure-sensitive adhesive reclosure
- A tamper-evident seal band
Tear notches on one or both sides help consumers open the pouch cleanly without needing scissors.
Three-side seal pouches are made in almost any size from tiny 3x4 cm sachets up to large bags for bulk products. Common retail sizes range from 8x12 cm for single-serve sachets to 20x30 cm for larger portions.
Custom sizes are standard. You specify the dimensions, film structure, print, and closure requirements, and the manufacturer produces to your spec. Minimum order quantities for custom-printed pouches vary by supplier but are often in the 1,000 to 2,000 unit range.
Compared to a stand-up pouch, a three-side seal bag is simpler to produce and often cheaper per unit. It doesn't need a gusseted base, which reduces material and machine time.
Compared to rigid packaging like jars or tins, it's dramatically lighter, takes less storage space when empty, and is easier to ship. This matters for brands watching freight costs.
For products that are designed to be used all at once (a single-serve sauce, a sachet of medicine, a sample cosmetic product), there's no need for a resealable closure. A clean heat-sealed three-side pouch is perfectly adequate and keeps costs low.
Laminate film pouches have historically been difficult to recycle because the different layers can't be easily separated. The picture is changing. Mono-material PE or PP pouches are now available that offer reasonable barrier properties while being recyclable in appropriate streams.
If sustainability is a priority for your brand, talk to your supplier about mono-material three-side seal options or options made with recyclable film structures. TheCardBoardBoxes can advise on the right trade-off between barrier performance and recyclability based on your product requirements.
For UK businesses, sourcing three-side seal pouches from a UK-based supplier means faster lead times, no import delays, easier communication, and simpler quality management. It also means your packaging is made to EU food contact and safety standards, which matters for retail and foodservice buyers.
At TheCardBoardBoxes, three-side seal pouches are available in custom sizes, full-colour print, and multiple material structures. Lead times are competitive and the artwork process is straightforward.
| Box Style | Any Style |
| Dimension | Custom sizes and shapes |
| Quantity | 250 - 500,000 boxes |
| Paper Stock | (12pt to 24pt) Cardstock, Kraft, E-Flute Corrugated, Cardboard, Bux-Board, Rigid |
| Printing | CMYK, PMS |
| Coating | Matte, Gloss |
| Finishing | Embossing, Debossing, Foil Stamping, Spot UV |
| Included Options | Die Cutting, Scoring, Gluing, Fold & Perforation |
| Proof | Electronic Proof (flat, 3D mock-up), Hardcopy Proofing (upon request) |
| Turnaround | 5 - 7 Business Days |
| Delivery | FLAT via Courier |
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A quick-drying, water-based layer that shields paper from smudges and grime while being eco-friendly.
This liquid finish cures under UV lights, giving your paper a vibrant, glossy shine.
This glossy treatment applies only to select areas, making images or text dramatically stand out.
This unique finish creates a velvety or suede-like texture under your fingertips.
A transparent ink that safeguards the page or provides subtle gloss, though it may yellow with age.
A thin plastic film bonded to paper for durability, available in shiny or non-glare finishes.
A rugged plastic barrier that stops scratches and wear from frequent handling.
This layer delivers a luxurious smooth feel and exceptional tear resistance.
Offset printing is a high-volume printing technique using metal plates and rubber blankets.
Digital printing is a method of printing directly from digital files to media.
UV printing uses UV light to instantly cure ink onto a wide variety of materials.
It is a process that transfers ink through a stenciled mesh screen onto a surface.
Flexography is a high-speed printing process using flexible plates and low-viscosity inks.
Gravure printing is a high-quality, high-speed intaglio printing method using engraved cylinders.
This method applies heat to bond glittering metallic hues like gold or silver onto paper, creating designs that truly shimmer.
This approach raises the paper from below to form a tactile image you can feel with your fingertips.
This technique indents your design into the paper, producing a striking recessed effect that brings dimension to your work.
This unique foil shifts through a vibrant spectrum of colors like a dazzling rainbow when light strikes it at specific angles.
This glossy clear varnish targets select areas of the page to highlight particular elements with eye-catching shine.
This sleek coating delivers a non-reflective, velvety texture that feels luxurious and enhances readability.
This highly reflective layer bounces back light, amplifying colors to make your print vibrant and dynamic.
Hot foil stamping is a printing method using heat to transfer foils for decoration.
Premium solid bleached sulfate, C1S coated for vibrant prints and superior food safety.
Solid bleached sulfate, double-coated for flawless printing and premium packaging appeal.
Pure uncoated unbleached kraft ensures raw, sustainable strength for authentic eco-packaging needs.
Clay-coated newsboard delivers affordable strength with smooth surface for bold branding.
Bold black kraft exudes premium elegance and robust protection for standout packaging.
100% recycled clay-coated newsboard offers eco-friendly durability and cost-effective packaging solutions.
Rustic natural brown kraft provides authentic, biodegradable strength for sustainable food packaging.
Clean white kraft combines natural strength with bright, recyclable appeal for branding.
Rugged natural kraft corrugated board delivers eco-friendly strength for reliable food transport.
Elegant oyster white corrugated board offers subtle sophistication and sturdy packaging protection.
Smooth kemi white corrugated ensures crisp prints and robust durability for premium shipping.
Bright bleached white corrugated provides pristine appearance with superior strength for branding.
Tall A-flute excels in superior cushioning and shock absorption for fragile foods.
Fine B-flute offers smooth printing surface and efficient collapse resistance for boxes.
Versatile C-flute balances strength, printability, and space efficiency for standard packaging.
Micro E-flute creates sleek, flat profiles with excellent print quality for retail.
Single face flute adds lightweight protection and flexibility for delicate food wrapping needs.
Single wall corrugated flute balances cost and cushioning for everyday food shipping demands.
Double wall flute delivers enhanced stacking strength for heavier food packaging loads.
Triple wall flute provides maximum crush resistance for industrial food transport durability.
It is a type of paperboard with a white clay-coated top side, ideal for luxury packaging.
Grey Chipboard Cardboard is a thick, sturdy material made from recycled content, ideal for luxury packaging.
This material is slim yet robust enough to maintain its form effectively for petite, lightweight boxes and resilient cards.
An excellent balanced option that offers a firm feel and reliable safeguarding for typical gift box varieties.
This dense board has a substantial heft in your grasp and ranks as the top pick for superior, long-lasting luxury packaging.
This exceptionally sturdy and inflexible material suits bigger items requiring additional reinforcement for security.
The densest and most resilient choice on offer, giving it a near-wooden sensation for the ultimate premium goods.
Everything you need to know about this product packaging.
It's a flat pouch sealed on three sides, with one side left open for filling. Once filled, the open side gets heat sealed to fully close the bag.
They're commonly used for snacks, coffee samples, supplements, cosmetics, wipes, and small retail products. They work well for single-serve or sample packaging.
Most are made from layered films like PET, aluminum foil, nylon, and PE. The mix depends on what you're packing and how much barrier protection you need.
If they include a foil layer, yes. The foil blocks odors, moisture, and light, making them good for products that need full barrier protection.
Yes, you can get them with custom printing, sizes, finishes (matte, gloss, or soft touch), and add-ons like tear notches or hang holes. MOQs usually start around 1,000 to 5,000 units.
3 side seal pouches lay flat and don't stand on their own. Stand-up pouches have a gusseted bottom that lets them sit upright on a shelf.
Use an impulse heat sealer or a band sealer for clean, airtight results. Press the open edge for 2 to 4 seconds depending on the film thickness.
Yes, if the material is rated for liquids and the seals are strong. They're often used for sauces, shampoo samples, and drink mixes.
It depends on the material. Single-material pouches (like all PE) are easier to recycle, while multi-layer foil pouches usually aren't curbside recyclable.
You can order from Alibaba, Uline, ePac, or custom packaging suppliers. Bulk orders bring the unit cost down, especially for printed designs.
