Center Seal Bags
Product Description
Center Seal Bags are tubular-style pouches formed from laminated PE/PO film with the seam running down the center of the back panel. The central seam is welded under high-temperature heat sealing to a controlled strength of at least 12N per 15 mm, which keeps the pouch intact under normal filling, vacuum or gas conditions, and shelf handling while leaving the front panel clean and unbroken. The film keeps good stiffness and a high light transmission of 93%, so the pouch stands and presents the product clearly on the shelf without fogging or haze. Silk-screen printing is applied for a durable, uniform print layer. Sizes span 10x15 cm to 30x40 cm at a thickness of 0.06 to 0.12 mm, suited to medium-format food, powder, and liquid-portion packaging where a clean front face is important. With no seam crossing the front, the whole panel can carry a continuous graphic without being split around a back seam.
The manufacturing value for this bag is dependable sealing strength at scale. The center seam is high-temperature heat-sealed to a verified minimum of 12N/15mm, and the film holds 93% transparency, which means buyers get a consistently strong seam and a clear presentable face on every pouch rather than occasional weak seams or cloudy film. Because the same line turns out up to 500,000 pieces a day, a large or repeat order does not force split sourcing or long lead gaps; the line can run double shifts to hold the committed delivery on big volumes. For a brand buying in millions, that combination of a controlled seam and a high daily output turns into stable delivery and fewer sealing complaints across the whole production run.
Specifications
|
Parameter |
Specification |
|
Material |
Laminated PE/PO film |
|
Structure |
Center-sealed (back mid-seam) pouch |
|
Seal strength |
>=12N/15mm |
|
Light transmission |
93% |
|
Size |
10x15 cm to 30x40 cm |
|
Thickness |
0.06-0.12 mm |
|
Printing |
Silk screen |
|
Standard |
GB/T 21665-2009, food-grade optional |
|
Recycled option |
Up to 60% recycled material |
Applications
Food & beverage portions.
The clean, clear 93%-transparent front panel shows the product well on shelf, and the strong center seam handles normal filling and handling without leakage.
Powder & granular fills.
The >=12N/15mm center seam resists burst under the weight of powder fills, reducing off-line seal rejects.
Wholesale retail packs.
The high daily output suits large repeat wholesale volumes where consistent pricing, delivery, and appearance matter across thousands of cartons.
Customization
The pouch size, film gauge, and laminate structure are adjustable, and the center-seal parameters can be tuned to the fill type. Silk-screen artwork, logo placement, and food-grade material options are supported, along with OEM/ODM production from customer drawings or samples.
Packaging & Transportation
Bags are packed in export carton boxes for shipment. Trade terms can be negotiated to suit the buyer, and goods damaged in transit are replaced under the after-sales policy.
FAQ
Q1. How fast is delivery for a large order?
A. Standard items ship in about 7 days, customized orders in about 15 days, and large orders can be run on double shifts to protect the committed lead time.
Q2. Can I mix sizes or colors in one order?
A. Yes, different colors and models can be combined within the same minimum order quantity of 50,000 pieces.
Q3. What is the quality warranty?
A. Products carry a 6-month warranty, and third-party inspection is accepted before shipment.
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