Center seal bags

Center-seal and pillow bags for flow-wrap packing

Center-seal bags are practical for high-volume packing where the back seal, repeat length and machine route drive the design.

01Center-seal and pillow-pack uses

Snack pillow packs

Flow-wrap style packs for chips, biscuits, candy and small food portions.

Frozen and chilled packs

Center-seal formats where low-temperature handling and seal strength need checking.

High-volume packing

Roll-fed production where machine speed and repeat length control the packaging route.

02Material, structure and finish options to confirm

Seal and roll direction

The film must match the machine, product, sealing jaw and required barrier. Back seal width and artwork repeat should be checked early.

Artwork follows the roll

Barcode, date code and front panel need to align with repeat length and cut position, not just the flat artwork preview.

Back-seal planning

Confirm product thickness, back-seal position, end-seal area, barcode or date-code zone and packing route before approving artwork.

03Print, lamination and bag-making route

Product brief

Confirm product type, size, fill weight or dimensions, storage condition and packing route.

Format choice

Compare the selected bag with adjacent formats before locking structure.

Material and finish

Discuss clear, metallized, matte, gloss, paper-look or other routes only after product use is known.

Print and converting

Check dieline, print colors, barcode, zipper, window, hang hole, seal area and gusset details.

Sample review

Review filled shape, seal margin, print alignment and carton packing before bulk production.

04Choose the practical route before production planning

Product runs as pillow pack or flow wrap

Discuss center-seal bag or roll-film route around equipment and repeat layout.

Send: Product size, machine route, repeat length, seal position and artwork.

Retail display needs a clean front panel

Keep back seal and code area away from key front artwork.

Send: Front/back artwork hierarchy, barcode position and date-code zone.

Product is fragile or uneven

Review headspace, seal pressure and carton packing before bulk production.

Send: Product photo, filled sample target, carton fit and quantity.

05Send these details for quote review

Product size and thickness

Back-seal and end-seal position

Machine or hand-packing route

Barcode, date-code and artwork placement

Target size, quantity range and delivery country or region

Material or structure preference if already known

Print colors, surface finish and print file readiness

Dieline, sample photo, current package photo or size sketch

06Compare related packaging formats

Applications

Center-seal and pillow-pack uses

Center-seal bags suit pillow-pack and flow-wrap style projects where the back seal, crimp seal and repeat layout need to match product handling.

Use case

Snack pillow packs

Flow-wrap style packs for chips, biscuits, candy and small food portions.

Use case

Frozen and chilled packs

Center-seal formats where low-temperature handling and seal strength need checking.

Use case

High-volume packing

Roll-fed production where machine speed and repeat length control the packaging route.

Bag and material fit

Material, structure and finish options to confirm

These options are planning routes, not fixed specifications. Final material and construction should be confirmed against product use, artwork and sample requirements.

Material route

Seal and roll direction

The film must match the machine, product, sealing jaw and required barrier. Back seal width and artwork repeat should be checked early.

Production handoff

Artwork follows the roll

Barcode, date code and front panel need to align with repeat length and cut position, not just the flat artwork preview.

Back-seal planning

Back-seal planning

Confirm product thickness, back-seal position, end-seal area, barcode or date-code zone and packing route before approving artwork.

Material and print route

Print, lamination and bag-making route

The packaging route connects artwork, material, print, lamination, bag making, QC focus and sample review using confirmed project details.

  1. 01

    Product brief

    Confirm product type, size, fill weight or dimensions, storage condition and packing route.

  2. 02

    Format choice

    Compare the selected bag with adjacent formats before locking structure.

  3. 03

    Material and finish

    Discuss clear, metallized, matte, gloss, paper-look or other routes only after product use is known.

  4. 04

    Print and converting

    Check dieline, print colors, barcode, zipper, window, hang hole, seal area and gusset details.

  5. 05

    Sample review

    Review filled shape, seal margin, print alignment and carton packing before bulk production.

Production check

Machine details are required

A center-seal project cannot be quoted well without film width, repeat length, seal direction and packing machine information.

Buying checks

Choose the practical route before production planning

1

When this applies

Product runs as pillow pack or flow wrap

Packaging advice

Discuss center-seal bag or roll-film route around equipment and repeat layout.

Send first

Product size, machine route, repeat length, seal position and artwork.

2

When this applies

Retail display needs a clean front panel

Packaging advice

Keep back seal and code area away from key front artwork.

Send first

Front/back artwork hierarchy, barcode position and date-code zone.

3

When this applies

Product is fragile or uneven

Packaging advice

Review headspace, seal pressure and carton packing before bulk production.

Send first

Product photo, filled sample target, carton fit and quantity.

RFQ details

Send these details for quote review

A useful RFQ connects product behavior, format choice, print file readiness, quantity and delivery country or region so the factory can check the right route.

  • Product size and thickness
  • Back-seal and end-seal position
  • Machine or hand-packing route
  • Barcode, date-code and artwork placement
  • Target size, quantity range and delivery country or region
  • Material or structure preference if already known
  • Print colors, surface finish and print file readiness
  • Dieline, sample photo, current package photo or size sketch

Quote request

Send center-seal bag details

Share bag size, roll width, cut length, eye mark, winding direction, artwork file and quantity range.

WhatsApp: +86 159 1896 4229 Phone: 15918964229 / 13798182413 Email: sales@yufengpackco.com Address: Jinping District, Shantou, Guangdong, China
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