Open-Top Compostable Mailer Bags Manufacturer
No Adhesive · Heat & Tape Sealing · B2B Bulk Supply
ORIZON is a China-based open-top compostable mailer bags manufacturer, supplying no-adhesive compostable mailer bags for professional packaging, fulfillment, and logistics systems.
These open-ended compostable mailers can be developed for downstream sealing methods such as heat sealing or tape sealing. Compatibility with the intended sealing equipment, temperature range and production line should be confirmed against the final film and bag specification before bulk production.
Retail and consumer sales are not supported.
What Are Open-Top Compostable Mailer Bags?
Open-top compostable mailer bags—also referred to as open-ended or no-adhesive compostable mailers—are shipping bags supplied without pre-applied adhesive strips or integrated closures.
Unlike self-adhesive mailers, these bags are designed to be sealed downstream using:
- Heat sealing equipment
- Tape sealing systems
- Custom closure or automated packing lines
They are widely specified in B2B packaging and fulfillment environments where sealing method, timing, or equipment varies by project.
Why Choose Open-Top Mailer Bags for B2B Packaging Systems?
Open-top compostable mailer bags are selected when:
- Packaging workflows require custom or delayed sealing
- Heat sealers or tape sealers are already integrated into packing lines
- One bag format must support multiple sealing methods
- Packaging distributors supply bags to different downstream users
Compared with self-adhesive compostable mailer bags, open-top formats offer greater flexibility and process control in industrial and fulfillment-center operations.
Certification & Documentation for Open-Top Compostable Mailers
Compostability certification should be reviewed against the actual finished mailer specification rather than inferred from the raw material or certification of another product category.
Relevant technical standards may include EN 13432, ASTM D6400, AS 4736 and AS 5810, depending on the intended market and composting environment.
Third-party certification programs and conformity marks may include those administered by BPI, TÜV AUSTRIA, ABA and DIN CERTCO.
ORIZON’s current OK compost INDUSTRIAL and OK compost HOME certificates by TÜV AUSTRIA state the Product Types “Bags for collection of biodegradable refuse” and “Shopping bags (check-out bags)”. These certificate scopes should not automatically be extended to open-top mailer bags.
For U.S. projects, ORIZON’s current BPI Online Product Catalog includes specific Courier Bags, Resealable Bags and Self-Adhesive Bags. However, an open-top, no-adhesive mailer should not automatically be treated as covered by those listings unless the proposed finished product matches an applicable current BPI-listed product or SKU.
Certification applicability for an open-top mailer may depend on:
- material formulation
- bag dimensions
- film thickness
- colour
- printing and ink
- additives
- sealing structure
- final finished-product configuration
Certification or conformity marks should only be used where the finished product falls within the applicable certified scope and all authorization and mark-use requirements have been satisfied.
Sealing Compatibility & Technical Considerations (B2B)
In professional procurement, open-top compostable mailer bags are specified based on sealing compatibility, not consumer convenience.
Buyers typically evaluate:
- Intended sealing method (heat seal or tape seal)
- Film thickness and sealability window
- Seal width and edge structure
- Compatibility with impulse or continuous band sealers
- Seal strength requirements for transport
- Storage stability under standard warehouse conditions
Sealing parameters should be reviewed during specification development and sample testing according to the intended sealing equipment, film formulation, bag thickness and required seal performance.
Typical Sizes & Bag Formats
Open-top compostable mailer bags are supplied in standardized and custom dimensions
for professional packaging systems.
Common configurations include:
- Flat open-top compostable mailer bags
- Gusseted open-ended mailer formats
- Custom width × length combinations
- Thickness ranges adjusted for sealing method
These products are designed for bulk handling and automated workflows,
not for retail mailer sales.
B2B Procurement & Distribution Scenarios
These open-top compostable mailer bags are supplied for professional procurement and distribution programs, including:
- Packaging distributors and wholesale supply chains
- OEM and private label programs for logistics and packaging brands
- Fulfillment centers using heat-seal or tape-seal packing lines
- Importers serving institutional and commercial packaging buyers
Products in this category are intended for commercial shipping systems
and are not designed for consumer retail packaging.
Bulk Supply, Packaging & Custom Options
Open-top compostable mailer bags are supplied in bulk, distributor-ready formats.
Customization options may include:
- Custom bag dimensions and film thickness
- Open-edge and seal-area construction for the intended sealing method
- Custom printing, including logos, branding and certification or conformity marks where applicable and authorized
- Inner packing format, carton configuration, and palletization
MOQ, lead time, and pricing depend on size, material specification, and customization scope.
Information Commonly Required for Quotation
To provide fast and accurate quotations, buyers typically specify:
- Destination market / country
- Bag size (width × length)
- Film thickness range
- Intended sealing method (heat seal or tape seal)
- Printing requirements
- Inner packing and carton format
- Estimated monthly volume
- Target delivery terms (FOB / CIF / DDP)
Why Work With ORIZON for Open-Top Compostable Mailers?
- Manufacturing compostable bags since 2009
- Approx. 20,000 m² total manufacturing site
- 16 production lines
- Approx. 500 metric tons/month production capacity
- OEM and private-label manufacturing
- Custom dimensions, thickness, printing and packing
- Product-specific certification and documentation review
- Bulk and repeat-order B2B supply
Product Categories
FAQ
No. Open-top mailer bags are supplied without adhesive and are designed for heat sealing or tape sealing.
Yes. Open-top formats are commonly used with impulse sealers, continuous band sealers, and tape-based automated systems.
Yes. OEM sizing, printing, and packaging formats are available for qualified B2B orders.
Standard customized production typically starts from approximately 500 kg per specification or design.
The equivalent number of mailers or cartons varies according to bag dimensions, thickness, film colour, printing, sealing structure and packing requirements. Product-specific trial quantities may differ.
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