Permanent Mailing Bag Closure Tape

Zhejiang Zhuolv New Materials Co., Ltd. is one of the leading manufacturers and suppliers of permanent mailing bag closure tape in China, also supports customized service. If you're going to buy bulk durable permanent mailing bag closure tape, welcome to get pricelist and free sample from our factory. Quality products and reasonable price are available.

Permanent Courier Bag Closure Tape is a pressure-sensitive sealing tape for courier, mailing and shipping bags made from HDPE and compatible PE films. It consists of a film carrier, adhesive layer and release liner. Tape width, adhesive width, liner extension, roll length and adhesive position can be specified according to the bag structure and application process.

Product Construction
Film Carrier
The film carrier provides dimensional support through coating, slitting, winding and application. Reference film thickness is 20–60 μm according to the required tape construction.
Pressure-Sensitive Adhesive
The adhesive forms the bonding layer between the tape and polyethylene film. Selection is based on film type, surface condition, closure design and application conditions.
Release Liner
The release liner protects the adhesive before use. Its extension provides a defined area for removal during bag production and final sealing.

Key Product Features

Permanent Closure
The adhesive is intended for closures that remain bonded after application. This construction suits courier and mailing bags with a fixed adhesive closure area.
Defined Adhesive Track
Adhesive width can be specified separately from total tape width. A 3–8 mm adhesive track allows the bonding area to follow the required flap design.
Controlled Roll Format
Tape width, roll length and core diameter are defined production dimensions. The selected format can be matched to the converting process and material consumption.

Technical Specifications

Application Compatibility
Courier Bags
Applied to polyethylene courier bags where the adhesive strip is positioned on the flap for package closure.
Mailing Bags
Suitable for mailing bags requiring a defined adhesive area and removable liner before sealing.
Shipping Bags
Tape dimensions can be matched to bag width, flap dimensions and polyethylene film construction.

Security Packaging
The permanent closure construction can be used where opening the sealed flap is intended to leave visible evidence on the package.

Selection Guide
Bag Film
Confirm the actual HDPE or PE film before tape selection. Film thickness, surface treatment, printing and additives can affect adhesive contact.
Tape Width
Select overall tape width according to the available flap area and closure geometry.
Adhesive Width
Define the adhesive track according to the required bonding area. The reference range is 3–8 mm.
Roll Format
Select roll length and core diameter according to the application process, material consumption and handling requirements.

Manufacturing Control
Adhesive Coating
Adhesive is applied according to the specified coating width and tape construction. The coating process controls the defined bonding track along the roll.
Slitting
Master rolls are slit to the required finished width. Tape width, adhesive position and edge condition are checked during conversion.
Winding
Roll winding is controlled for consistent roll formation and stable unwinding during application.
Finished-Roll Inspection
Finished rolls are checked for tape width, adhesive position, liner condition, roll length, winding condition and appearance against the approved specification.

Custom Configuration
Tape Dimensions
Tape width, adhesive width, film thickness and liner extension can be specified according to the bag design.
Adhesive Position
Left-side, right-side or defined adhesive positioning can be configured for different flap layouts and sealing directions.
Roll Specifications
Roll length, core diameter, winding direction and packing quantity can be established according to the intended production process.

Application Qualification
Film Testing
Testing on the actual HDPE or PE film provides a direct basis for confirming adhesive compatibility with the production bag.
Process Testing
Application testing checks liner removal, tape positioning, feeding and closure behavior under the intended production conditions.
Sample Approval
A bag sample, existing tape sample or dimensional drawing can be used to confirm tape construction and dimensions before regular production.

Procurement Information
Material Data
Provide film type, film thickness, surface condition, printing status and bag structure.
Tape Data
Specify tape width, adhesive width, liner extension, adhesive position, roll length and core diameter.
Process Data
Include application method, bag dimensions, feeding direction, operating conditions and expected tape consumption when available.
Reference Sample
A physical bag, existing tape sample or dimensional drawing helps establish the required construction and production specification.

Quality & Specification Control
Dimensional Checks
Tape width, adhesive width, liner position and roll length are checked against the approved production specification.
Roll Inspection
Roll formation, edge condition, winding consistency and surface appearance are reviewed during finished-roll inspection.
Application Verification
Adhesive contact and liner handling can be evaluated using the specified bag film before production approval.

FAQ
What films are suitable for Permanent Courier Bag Closure Tape?
The tape is intended for HDPE and compatible PE films. Final adhesive selection should be confirmed using the actual production film.
What tape widths are available?
The reference tape width is 9–17 mm, with an adhesive width of 3–8 mm.
Can the adhesive position be customized?
Yes. Left-side, right-side and defined adhesive positions can be specified according to the bag flap configuration.
Can roll length and core diameter be customized?
Yes. Reference roll lengths are 500–1,540 m and core diameters are 76–120 mm. Final dimensions are confirmed according to the application process.
What information is required for product selection?
Key information includes film type, film thickness, bag structure, tape width, adhesive width, liner extension, adhesive position, roll length, core diameter and application method.
How should the tape be qualified before production?
Testing should use the actual bag film and intended application process. This allows tape dimensions, liner handling and adhesive contact to be confirmed before regular production.