Fin Seal Pouch | Custom Printed Tea & Milk Powder Packaging Bags
1. Custom Printed Fin Seal Pouch for Milk Tea & Food Powder | Bulk OEM Supplier -OK Packaging
With 20 years of dedicated experience in flexible packaging, Dongguan OK Packaging Manufacturing Co., Ltd. supplies high-quality fin seal pouches to food brands, distributors, importers and FMCG manufacturers worldwide. Backed by three production facilities in Dongguan, Bangkok and Ho Chi Minh City, we deliver consistent, scalable custom packaging solutions built for fine dry powder products.
As a classic back seal pillow pouch format, the fin seal structure is the global industry standard for milk tea mix, instant beverage powder and dry food applications. Our production lines support orders of all scales — from mid-volume brand launches to full-container wholesale contracts — with no upper volume limit for enterprise clients.
We control the entire production process ( one-stop factory: from raw film to fin seal pouches )
Our core strengths lie in stable bulk supply, on-time delivery, a professional customization team, and extensive global export experience—all tailored to meet the high standards of large wholesalers, manufacturers, and brand owners in the fish food industry.
We offer one-stop service for large orders, covering the entire procurement cycle. In the pre-sales stage, our professional team will provide customized solutions based on your specific needs, including fish feed type, packaging volume, and export destination requirements. During production, we utilize advanced gravure and digital printing equipment to ensure consistently high quality, even in large-scale production. For after-sales service, we provide comprehensive support: real-time logistics tracking, 24-hour quality feedback response, and targeted solutions for transportation or packaging-related issues, ensuring a smooth collaborative experience.
We have three production bases: Dongguan, China; Bangkok, Thailand; and Ho Chi Minh City, Vietnam, ensuring superior quality, competitive prices, a superior global service chain, and seamless integration from your concept to the final packaged product.
2.What Is a Fin Seal Pouch?
A fin seal pouch is a type of back seal pouch, defined by a single continuous longitudinal heat seal running down the center of the rear panel. The two film edges are folded outward to form a raised, double-layer “fin” seam, which gives the structure its name. Once filled, the pouch takes on a rounded, pillow-like profile, hence the interchangeable term back seal pillow pouch.
Unlike side-gusset or flat-bottom pouches, the standard fin seal format has no folded side panels. Its simple, streamlined structure delivers reliable sealing performance at a competitive unit cost, making it a staple for high-volume powder packaging.
Fin Seal vs. Lap Seal: Selection Guide for Powder Products
Fin seal and lap seal are the two most common back seal constructions, and they perform very differently for fine powder applications:
Fin seal: Film edges are folded outward to form a double-layer sealed seam, delivering peel strength of ≥ 12 N/15 mm and exceptional burst resistance. Under standard high-speed filling conditions, burst rates typically stay below 0.1%. This double-layer structure maintains integrity under internal pressure during transit and production, making it the preferred choice for milk tea powder, fine seasonings and other particulate products.
Lap seal: One film edge overlaps the other to create a flat, single-layer seal. It uses slightly less material but offers lower seal strength, and is better suited for lightweight, non-fine solid goods such as whole snacks and confectionery.
For milk tea powder and sensitive dry food applications, we standardize on fin seal construction to guarantee leak-proof performance and reliable production efficiency.
Common Industry Terms Clarified
Global packaging markets use several overlapping terms for this format, which can cause specification confusion during procurement. We clearly define all structures on every order to avoid production errors:
Back seal pouch / back seam pouch: The umbrella term for any pouch with a vertical rear seal, covering both fin and lap seal constructions.
Center seal pouch: The most widely used term in Southeast Asian markets, referring to the same rear-center seal structure.
Pillow pouch: Describes the filled shape of a non-gusseted fin seal bag, rather than the sealing structure itself.
3.Key Benefits for Powder Packaging
Milk tea and beverage powders face three core packaging challenges: fine particle leakage during filling, moisture-induced caking during storage, and flavor degradation over shelf life. The fin seal structure addresses all three, which is why it has become the global default for this product category.
The double-layer fin seam creates a robust barrier against powder leakage, even on high-speed rotary filling lines. Unlike lap seal structures, there is minimal risk of fine particles working their way through the seal joint during filling or transit.
Multi-layer high-barrier lamination blocks moisture and oxygen ingress, preventing caking and preserving the fresh aroma of tea and dairy ingredients.
The seamless front panel provides unbroken branding space — a critical advantage for milk tea brands competing for shelf attention in retail and convenience channels.
Proven Leak Resistance for Fine Powders
We manufacture all fin seal pouches with precise seal width control and uniform heat sealing parameters, delivering consistent double-layer seam strength across every batch. This drastically reduces leakage risks for fine milk tea powder and seasoning products, cutting product waste and retail-end quality complaints.
Uninterrupted Surface for Brand Presentation
The entire front panel of a fin seal pouch is free of seams, providing a full, flat canvas for brand artwork, product information and regulatory labeling. This clean, seamless surface delivers a premium shelf appearance and gives brands maximum design flexibility to stand out in crowded retail environments.
High-Barrier Lamination for Longer Shelf Life
We engineer multi-layer lamination structures tailored to milk tea powder’s sensitivity to moisture, oxygen and light. Our high-barrier configurations achieve oxygen transmission rates (OTR) as low as 0.1 cc/m²·day, effectively preventing flavor degradation and spoilage throughout distribution and storage. This extends product shelf life and reduces quality-related losses across your supply chain.
Cost-Effective Structure for Bulk Production
The simple, efficient structure of fin seal pouches enables high converting speed and minimal material waste in production. For bulk wholesale and brand orders, this translates into lower unit cost without compromising performance or print quality — making it the most cost-effective format for high-volume FMCG powder products.
4.Customization Options & Technical Specifications
Tailored Lamination Structures
We formulate material structures based on your product’s barrier requirements, shelf life target and filling process:
Standard barrier: BOPP / VMPET / PE — for general dry powder products with moderate shelf life needs
Medium barrier: PET / VMPET / PE — enhanced oxygen and moisture barrier for regional distribution
High barrier: PET / AL / PE, — premium barrier performance for long shelf life and export markets
All film materials are food-contact safe and sourced from qualified global suppliers.
10-Color Rotogravure Printing
Up to 10-color rotogravure printing for photorealistic reproduction and precise Pantone matching
Supports CMYK plus spot colors, white ink backing and reverse printing
Finishes available: glossy, matte, soft-touch and partial UV coating
Strict batch-to-batch color consistency control for repeat large-volume orders
Optional Functional Features
V-cut or straight easy-tear notches
Laser score lines for controlled, clean opening
Euro slot hang holes for retail peg display
Custom seal width and tear initiation points
Side gusset or bottom gusset upgrades available on request
Global Food Safety Compliance
All production facilities operate under BRC Grade A certification, and all fin seal pouch materials comply with FDA 21 CFR and EU 1935/2004 food contact material regulations. We provide full batch test reports and compliance documentation with every order, supporting smooth customs clearance for markets across North America, Europe, Southeast Asia and Oceania.
Technical Data Sheet Reference
| Parameter | Standard Range | Notes |
|---|---|---|
| Pouch width | 50 mm – 300 mm | Custom sizes available |
| Pouch length | 80 mm – 450 mm | Sized to filling equipment specs |
| Film thickness | 60 μm – 180 μm | Tuned by structure and product weight |
| Seal type | Fin seal (standard) / Lap seal | Fin seal recommended for powder |
| Seal peel strength | ≥ 12 N/15 mm | Standard for fin seal construction |
| Printing | Up to 10-color rotogravure | CMYK + spot colors, Pantone matched |
| OTR (high-barrier grade) | Down to 0.1 cc/m²·day | Aluminum foil lamination structure |
| Compliance | BRCGrade A, FDA 21 CFR, EU 1935/2004 | Full documentation provided per shipment |
5.Ideal Applications
Core: Milk Tea & Instant Beverage Powders
Fin seal pouches are the global standard format for:
3-in-1 instant milk tea mix
Matcha and green tea powder
Instant coffee and coffee mix
Fruit flavor drink powder
Chocolate and malt beverage powder
Additional Suitable Products
Spice and seasoning powder
Nutritional supplement and protein powder
Snack foods and confectionery
Pet food and treat products
Personal care and household powder products
6. Why Partner With Dongguan OK Packaging?
20+ Years of Flexible Packaging Manufacturing Experience
GDOK Packaging, officially named Dongguan OK Packaging Manufacturing Co., Ltd., is a professional flexible packaging factory with more than 20 years of production experience. We focus on R&D, production and sales of various resealable pouches and plastic packaging bags, serving thousands of global brands, wholesalers and trade companies.
Professional R&D & Quality Control Team
We own a complete R&D department and rigorous quality control system. Every batch of 3 side seal zipper bags will go through multiple rounds of inspection before delivery, to ensure all finished products meet client requirements and international industry standards.
Tri-Regional Capacity for Large Bulk Orders
We operate three modern production facilities across Dongguan (China), Bangkok (Thailand) and Ho Chi Minh City (Vietnam), equipped with multiple 10-color high-speed rotogravure printing lines and automated converting equipment. This distributed footprint lets us handle very large-volume wholesale and brand orders with stable, predictable lead times, while supporting regional supply chain strategies and tariff optimization for global clients.
Dedicated End-to-End Account Support
For every bulk OEM project, we assign a dedicated account manager and technical support engineer as your single point of contact — from initial quotation through to final delivery. We support design review, material sampling, performance testing, production progress updates and logistics coordination, ensuring clear communication, on-time delivery and smooth execution for every order.
7.Our Bulk OEM Process
Pre-Production: Design, Sampling & Validation
Free structural design consultation and material recommendation
DFM (Design for Manufacturing) review to optimize production efficiency
Custom pre-production samples for seal strength testing and line trial runs
Mass Production: Scalable & Consistent Output
Flexible MOQs with no upper volume limit for wholesale and enterprise orders
Real-time production progress reporting and scheduled quality checkpoints
Strict color and performance consistency across multi-batch repeat orders
Global Logistics & Customs Support
Flexible trade terms: EXW, FOB, CIF, DDP and more
Coordinated sea freight, air freight and express shipping options
Full export documentation and compliance certificates for smooth customs clearance
7.B2B Service & Order Solutions for Wholesalers & Brands
OEM & ODM One-Stop Packaging Service
We provide full OEM and ODM one-stop service for 3 side seal zipper bags, covering design, sample making, mass production and after-sales support. We tailor exclusive packaging solutions according to your brand positioning and market demands.
Bulk Order Support for Large Distributors & Brand Owners
We specialize in undertaking large bulk orders from global wholesalers, trading companies and brand manufacturers. Flexible MOQ, stable output and long-term supply capability are our core advantages for all B2B partners.
Our product certifications by RGS SEXDE FDA, EU 10/2011, and BPI—ensuring safety for food contact and compliance with global eco-standards.
FAQ about Fin Seal Pouch
Q1: Are these pouches compatible with automatic filling machines?
Yes. Our fin seal pouches are manufactured with strict dimensional tolerance, compatible with all mainstream rotary automatic pouch filling and sealing machines. We can adjust specifications to match your existing equipment setup.
Q2: What barrier level do you recommend for milk tea powder?
For domestic and regional distribution with a 6–12 month shelf life target, VMPET-based structures offer excellent value. For export markets or 12+ month shelf life requirements, we recommend aluminum foil high-barrier structures with OTR as low as 0.1 cc/m²·day.
Q3: What is the minimum order quantity for custom printed fin seal pouches?
MOQ varies by material structure and pouch size. For standard custom printed fin seal pouches, our minimum order starts at 10,000 pieces. Tiered volume pricing applies for orders of 500,000 pieces and above. Contact our sales team with your exact requirements for a precise quotation.
Share your pouch dimensions, material preference, estimated order volume and target delivery schedule. Our packaging engineering and sales team will respond within 24 hours with a detailed technical proposal and competitive pricing for your bulk fin seal pouch project
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