Large Plastic Postage Bags

The large plastic postage bags are made of opaque grey 60Mu film and are attached to the envelope lip with a strong self-adhesive closure. With this great closure, your items won't be affected, keeping out moisture, dirt and even air. These plastic postage bags are suitable for any courier or for the purpose of hermetically storing items, whether for personal or commercial use. Made of 100% virgin polyethylene, the large plastic postage bags are extremely durable and sturdy on the outside and has a sturdy black protective lining on the inside. Each shipping envelope comes with a self-seal, allowing you to easily remove it without any static, ensuring it doesn't stick to your hands or shipping and mailing bags. It is easy to stick even when stored and unused for up to 1 year.

Secure Packaging for Product Transport
Waterproof, Dustproof, and Contamination-Resistant Protection
Anti-Theft and Tamper-Evident Design
Vehicle for Brand Promotion and Marketing
Replaces Traditional Cardboard Boxes to Save Space

1. Material: LDPE virgin or recycled materials are used to ensure the recyclability of materials and reduce the consumption of natural resources. The emission of harmful substances is reduced during the production process, which meets international environmental standards and reduces environmental pollution. Recyclable materials not only protect the environment, but also help companies achieve sustainable development goals and enhance their brand image.

2. High durability: The co-extrusion film technology is used to give the bag extremely high tear and puncture resistance, ensuring that it is intact in harsh transportation environments. The thickened design provides stronger protection and is suitable for mailing heavy and fragile items. Through multiple quality tests, including tensile strength tests and puncture resistance tests, it is ensured that each mailing bag can withstand the pressure and impact during transportation.

3. Waterproof and moisture-proof: High-quality materials and sealing design give the bag superior waterproof performance, effectively preventing rain and moisture from entering the bag and protecting the internal items from drying. It is especially suitable for moisture-sensitive items such as electronic products, books and documents to ensure that they are not damaged by moisture during transportation. Good sealing can prevent external dust and impurities from entering the bag, keeping the internal items clean and safe.

4. Lightweight and easy to use: The material is lightweight, easy to carry and use, and reduces transportation costs.
Suitable for various mailing needs, including express delivery, retail and personal use, with high flexibility.
Simple operation and easy use, no complex tools or equipment are required to quickly complete the packaging work.

5. Self-sealing design:
Equipped with a strong self-adhesive strip to ensure that the bag mouth is tightly closed to prevent reuse after opening, and has an anti-tampering function. The centrifugal membrane design makes the bag more convenient to use, and it can be sealed with a simple press, without the need for additional tape or sealer. The design of the self-adhesive strip not only improves safety, but also reduces the user's operation time and improves work efficiency.

Large plastic mailing bags are widely used in:
E-commerce platforms (such as cross-border e-commerce and independent store sellers)
Courier and logistics industries
Clothing and textile packaging
Shipping of electronic products and accessories
Mailing of documents and lightweight goods

Size (Width × Length)	Thickness (Microns)	Recommended Use
400 × 500 mm	50–70 μm	Clothing, light goods
450 × 600 mm	60–80 μm	Bulk apparel, textiles
500 × 700 mm	70–90 μm	Large parcels
600 × 800 mm	80–100 μm	Heavy-duty shipping
Custom Sizes	40–120 μm	OEM requirements

Production Workflow:

Raw Material Selection (LDPE / Recycled Materials / Biodegradable Materials)
Film Blowing (Single-layer or Co-extrusion Process)
Printing (Flexographic or Gravure)
Cutting and Heat Sealing
Adhesive Strip Application (Tamper-evident Seal)
Quality Inspection and Packaging

Structural Types:

Single-layer PE Film
Multi-layer Co-extruded Film (Higher Strength)
Optional Bubble Lining (Enhanced Cushioning Protection)

Q1: Are the mailing bags waterproof?
Yes, the products feature excellent water-resistant and moisture-proof properties.

Q2: Can I customize the logo and printing?
Yes, we offer OEM/ODM services, including customization of logos, colors, and patterns.

Q3: What is the Minimum Order Quantity (MOQ)?
Depending on the size and customization requirements, the standard MOQ is 10,000 units.

Q4: Do you offer eco-friendly materials?
Yes, we offer options for recyclable and biodegradable materials.

Q5: Are the bags durable?
They are made from high-strength materials and possess excellent tear and puncture resistance.

Standard Export Cartons (500–1,000 units per carton)
Custom Packaging (Retail packaging, branded outer cartons)
Roll or Flat Packaging
Palletized Loading (Suitable for large-volume shipments)

Self-Sealing Courier Bags
Dual-Adhesive Return Bags
Bubble-Lined Mailers
Thickened Co-Extruded Heavy-Duty Bags
Mailing Bags with Handle Holes
Colored or Frosted-Finish Mailing Bags

Custom Dimensions & Thickness
Multi-Color Printing (Logos, Patterns)
Material Selection (LDPE, Recycled Materials, Biodegradable)
Surface Finish (Matte / Glossy)
Custom Packaging Options

As a Professional Manufacturer and Exporter of Plastic Packaging Bags:
Over 20 Years of Industry Experience
Advanced Equipment and Strict Quality Control
Robust OEM/ODM Capabilities
Rapid Delivery and Global Logistics Support
Serving Clients in International Markets, Including Europe and the Americas

 

 

Service Content：	The company provides OEM and ODM services to meet the diverse needs of different customers
Production using recycled materials	Many of our products contain at least 30% recycled content, avoiding the additional cost pressures of increased taxes on imported plastic packaging.
Certificate	ISO14001, ISO9001, SGS-REACH, SGS-LDPE polyethylene bag (30% recycled material), USB TEXT5873-GRS-2022-01
Packaging method	Boxed, bagged, custom packaging
Delivery time	Usually about 35 days after receiving advance payment and confirming all details
Sample/supply quantity	3-7 days. Some of our samples are free, and some are chargeable. Can supply more than 50 containers per month
Minimum order quantity	According to specifications, between 100kgs-1000kgs
Price	Depends on size, thickness, packaging and printing

 

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