Three-Side Sealing Packaging Process

Three-Side Sealing Packaging Process

Three-Side Sealing Packaging – A cost-effective flexible packaging solution suitable for products in multiple industries such as food, daily chemicals, pharmaceuticals, and electronic components. The structure is simple, with good sealing performance and flexible customization options.

What is three-side sealing packaging?

Three-side sealing packagingAlso known as Three Side Seal Pouch / 3 Side Seal BagIt is a flat flexible packaging bag composed of three heat-sealed edges. The bag body usually retains one opening for filling, which is then sealed after filling to form a complete sealed package.

Compared to stand-up pouches and octagonal sealed bags,Three-side sealed bagSleek structure, flat bag body, compact size, suitable for single-use, small-sized products, vacuum packaging, powder and granular items, tablet foods, and various sample packaging.

 Three-Side Sealing Bag    Process Advantages

Simple structure, more cost-effective

Three-Side Sealing Bag: The bag-making structure is mature, with high material utilization and fast production efficiency, making it suitable for large-scale custom packaging.

Good sealing performance, stable protective properties

Triple heat-sealed edges are secure and can be customized with composite materials such as high barrier, puncture-resistant, moisture-proof, and anti-oxidation options based on the contents.

Smooth bag body, clear display

Printable on both sides, suitable for displaying brand logo, product information, ingredient details, usage instructions, and barcode information.

Wide range of applications

Applicable for food packaging, vacuum packaging, mask packaging, seasoning packaging, pet snack packaging, medical supplies packaging, and electronic component packaging.

Supports various customization processes

Customizable dimensions, materials, thickness, printed graphics, transparent windows, tear notches, hanging holes, rounded corners, matte finish, glossy finish, and partial UV finishing.

Parameter Introduction

The following are the common technical parameter ranges for three-side sealing bags. Specific parameters can be customized and adjusted according to product size, weight, and packaging method.

Parameter Dimensions Specification Range / Options Description
Dimensions Specifications
Bag Width (Front Width) 50 – 300 mm Customizable based on product capacity, display area, and filling method
Bag Height (Front Height) 70 – 450 mm Suitable for different package sizes such as small, medium, and large bags
Edge Width 5 – 12 mm Standard heat-sealed edges are clear and secure, and can be adjusted according to the weight of the contents.
Bag Structure Three-side sealing, four-side sealing, vacuum three-side sealing, and hole-equipped three-side sealing Suitable for packaging food, vacuum, masks, condiments, and small accessories
Material Combinations
Economic Type PET/PE、BOPP/CPP Suitable for packaging of ordinary food, snacks, candies, daily necessities, etc.
Standard Barrier Type PET/PE、PET/CPP、BOPP/CPP Basic moisture-proof, sealing, and printed display effects
High barrier type PET/AL/PE、PET/VMPET/PE Moisture-proof and aroma-preserving packaging suitable for spice powders, coffee powders, tea powders, freeze-dried foods, etc.
Vacuum puncture-resistant type PA/PE、PET/PA/PE、PET/NY/PE Suitable for vacuum packaging of meat, ready-to-eat foods, seafood, frozen foods, etc.
Transparent Display Type PET/PE、PA/PE Clear vacuum bags or food packaging bags suitable for displaying contents
Printing and Post-Processing
Printing Process Offset Printing, Digital Printing Offset printing is suitable for large orders, while digital printing is ideal for small quantity samples and test orders.
Print Color Count 1 – 10 Colors Support for brand logos, product information, barcodes, and instructional text printing
Surface Treatment Matte, Gloss, Partial UV, Foil Stamping Choose based on different product positioning such as food, cosmetics, and daily chemicals.
Bag Corner Treatment Right Angle, Rounded Edge Rounded corners are more suitable for face masks, medical supplies, and portable small packages.
Function Options
Easy-tear notch Optional (U-shape / V-shape / Straight) Easy to open for consumers, suitable for single-use food bags and mask bags
Mounting hole Optional (Round hole / Airplane hole) Suitable for display on supermarket shelves and retail hanging packaging
Clear Window Optional (Circular / Elliptical / Irregular Shape) Used to display the contents and enhance product visualization
Vacuum packaging Optional Suitable for packaging meat, ready-to-eat foods, seafood, chilled foods, and frozen foods
Vent hole Optional Suitable for special product packaging that requires ventilation or gas release
Business Parameters
Minimum Order Quantity (MOQ) Offset: 5,000 – 10,000 pieces; Digital: 500 – 1,000 pieces Minimum order quantity is determined based on size, material, printing process, and order quantity.
Sample lead time Digital proof: 3 – 5 days; Print proof: 5 – 7 days It is recommended to confirm the size, material, color, and sealing effect through a sample before placing the first order.
Production Cycle First order: 15 – 25 days; reorder: 10 – 15 days Delivery time will be determined based on the order quantity, complexity of the process, and factory production schedule.

Common applications of three-side sealing technology

Food Snack Packaging

Suitable for products such as cookies, candies, nuts, dried fruits, seasonings, and small snacks. The bag is lightweight and features a sealable, moisture-proof design, ideal for e-commerce and retail packaging.

Vacuum Food Packaging

Suitable for vacuum packaging of meat, ready-to-eat foods, seafood, chicken breast, fish slices, frozen foods, and can be paired with PA/PE or PET/PA/PE materials to enhance puncture resistance and preservation performance.

Face Mask and Beauty Packaging

Three-side sealed bags are commonly used for single-plate masks, eye masks, sample packs, and small pouches for essences. The bag surface is flat, offering good print display effects.

Seasoning Packaging

Suitable for small packaging of condiments, seasonings, chili powder, coffee powder, tea powder, etc. High barrier composite film can be selected to enhance moisture resistance and aroma preservation.

Medical and Personal Care Product Packaging

Suitable for packaging of wet wipes, alcohol swabs, personal care products, disposable items, etc., supports easy-tear opening and custom individual small packaging.

Electronic Accessories Packaging

Suitable for packaging small hardware parts, screws, connectors, data cables, and other small accessories. Custom transparent bags or printed bags are available.

Three-Side Sealing Packaging Case