China Custom Printed Biodegradable Plastic Bags Factory

Guanzhong: A Chinese Factory Focused on Custom Biodegradable Plastic Bag Production

Guanzhong is a Chinese manufacturing factory with a core business in custom biodegradable plastic bag production. The company is located on Dongping Light Industry Avenue, Yongchun County, Quanzhou City, Fujian Province, and relies on its large-scale industrial park and complete manufacturing system to provide stable, compliant, and environmentally friendly packaging solutions for domestic and international customers.

• Clear factory positioning: Unlike companies transitioning from traditional plastics, Guanzhong has focused on bio-based and biodegradable materials since its establishment, specializing in the research, development, and large-scale production of biodegradable plastic bags rather than operating multiple unrelated product lines. This clear focus allows a more systematic and mature approach to material selection and process design.
• Large-scale self-owned production base: The company owns an industrial park of nearly 200,000 square meters, with a total production and R&D area exceeding 100,000 square meters. The park includes standardized workshops and R&D facilities, providing a hardware foundation for continuous production and quality stability of biodegradable plastic bags.
• Stable production capacity and workforce: Guanzhong has approximately 180 production personnel and has established a complete process for biodegradable plastic bags, from material modification and film extrusion to bag making and printing. The annual total capacity is about 90,000 tons, capable of meeting long-term supply requirements for retail, e-commerce, and public environmental projects.
• R&D and testing-supported manufacturing model: .The company has an independent R&D center and testing system for material performance optimization, process parameter adjustment, and custom project verification. This “R&D + manufacturing” parallel model enables Guanzhong to provide more targeted solutions for different market and application needs.

Through focused products, solid manufacturing foundations, and continuous technical investment, Guanzhong has gradually developed into a Chinese factory with stable delivery capacity and professional recognition in the field of biodegradable plastic bags.

Advantages and Applications of PLA+PBAT Modified Materials

In the field of biodegradable plastic bags, the choice of material system directly determines product usability and compliance. Guanzhong currently uses a core solution based on PLA (polylactic acid) + PBAT bio-based biodegradable composite materials.

PLA is derived from corn, grains, and other renewable resources, offering good bio-based properties and rigidity but tends to be brittle when used alone. PBAT is a fully biodegradable flexible material with excellent elongation and tear resistance. Through scientific blending and modification processes, combining them can significantly improve material performance while maintaining degradability.

In practice, this PLA+PBAT modified material has several obvious advantages:

• Balanced mechanical properties: the bag is not easy to crack, with stable load-bearing performance.
• Strong processing adaptability: suitable for film extrusion, heat sealing, and high-speed bag making.
• Clear degradation path: can be decomposed by microorganisms into CO₂, water, and biomass under industrial composting conditions.

Based on these characteristics, this material has been widely applied to:

• Biodegradable shopping bags
• Biodegradable garbage bags and roll bags
• Biodegradable pet waste bags
• Eco-friendly packaging bags for retail and e-commerce

This is why Guanzhong adopts PLA+PBAT modified materials as the core direction for custom printed biodegradable plastic bags.

Guanzhong’s Core Manufacturing Capabilities as a Biodegradable Bag Factory

As a biodegradable bag factory with manufacturing depth as its core competitive advantage, Guanzhong has established a systematic production system for biodegradable plastic bags from material to finished product. Its strengths are reflected not only in production scale but also in stable control over key manufacturing steps.

• Self-sufficient bio-based material modification: Guanzhong uses bio-based and biodegradable composite materials, focusing on the PLA+PBAT modification system. Through in-house production lines for bio-based modified masterbatches, the company adjusts material toughness, tensile strength, and processing stability. This material-level control ensures consistent performance for biodegradable plastic bags.
• Complete film extrusion and printing system: The company operates 50 bio-degradable film extrusion and printing lines, enabling stable control of film thickness, surface quality, and print compatibility, ensuring heat-sealing strength and consistent appearance in bag production.
• Diverse bag making capabilities and production scale: Guanzhong has 25 bag-making lines supporting T-shirt bags, flat bags, roll bags, and other structures. With the current configuration, monthly production capacity for films and bags can reach approximately 1,500 tons, suitable for long-term batch supply.
• Standardized management for stable delivery: Through standardized workshops and mature processes, Guanzhong can maintain consistent quality while achieving large-scale continuous production of biodegradable plastic bags. This stable delivery capability is critical for retail, e-commerce, and public environmental projects.

Through continuous investment in materials, equipment, and processes, Guanzhong elevates biodegradable plastic bag production from “possible” to “consistently reliable,” forming the core value of its position as a biodegradable bag factory.

Practical Guide to Custom Printed Biodegradable Plastic Bags

For brands, retailers, and cross-border clients, customizing a compliant, stable, and brand-recognizable biodegradable plastic bag is not just “printing a logo.” It involves material selection, structural design, printing technology, and quality control. Guanzhong has developed an efficient, replicable process for custom printed biodegradable plastic bags.

1. Requirement communication and application confirmation
At project initiation, Guanzhong communicates with clients to clarify the bag’s use scenarios and functional needs:

• Application type: retail shopping bag, e-commerce courier bag, food packaging, fresh produce/trash bag
• Load and usage frequency: single-use or multi-use
• Target market regulations: EU, North America, Japan, etc.
• Brand positioning: eco-friendly emphasis, high-end visual design

This stage avoids over-specification or insufficient performance.

2. Material plan selection: PLA+PBAT modification
Based on application, Guanzhong adjusts PLA+PBAT ratios for performance-cost balance:

• PLA: rigidity and bio-based attributes
• PBAT: flexibility, tear resistance, low-temperature performance
• Modifiers: improve processing and film-forming stability

Key customizable parameters: bag thickness (μm), tensile strength, elongation, hand feel, compatibility with high-speed packaging equipment.

3. Bag type and structural design
After materials are selected, engineering designs bag types:

• Flat/ T-shirt bags, gusset bags, self-seal courier bags, roll bags
• Optimizes material utilization, production cost, and automation compatibility

4. Printing design and eco-friendly ink selection
Printing is key to brand differentiation:

• Flexographic printing (1–8 colors)
• Water-based, low VOC, food-contact compliant inks
• Layout and size adaptation for bag type
• Proofing and color matching before mass production

5. Sample proofing and performance testing
Before production, samples are provided for:

• Physical bag confirmation (size, thickness, print)
• Load and tensile testing
• Seal strength and tear resistance
• Degradability verification

Mass production begins only after customer approval.

6. Scaled production and quality control
During production, Guanzhong ensures:

• Raw material batch control for PLA+PBAT consistency
• Inline inspection for extrusion, printing, and bag-making
• Sampling checks for size, weight, and print clarity

This ensures all custom printed biodegradable plastic bags meet performance and visual standards for export and branding.

7. Packaging, delivery, and after-sales support

• Neutral or branded packaging
• Export-standard packing for shipping
• Technical and compliance documentation
• Continuous support for upgrades or new designs

Guanzhong’s Customization Capabilities and Real Application Cases

Guanzhong offers not just standard products, but a full customization system covering materials, structure, and printing.

Customization Capabilities

1. Material and performance customization

• PLA+PBAT modification with adjustable ratios
• Bag thickness tailored for load and cost balance
• Tear resistance, tensile performance, and flexibility optimization
• Suitable for shopping, courier, and fresh produce bags

2. Bag type and size customization

• T-shirt bags, flat bags, gusset bags, courier bags, roll bags
• Non-standard sizes for various product specs and packaging equipment
• Adjustable handle length, bag opening, sealing method

3. Printing and branding customization

• 1–8 color eco-friendly printing compatible with biodegradable films
• Custom logos, brand info, and graphics layout
• Water-based eco ink, high print clarity, low odor
• Full coverage or selective printing to balance cost and visual effect

Real Application Cases

Case 1: European retail brand eco shopping bag project
A European retail chain upgraded packaging from conventional plastic to biodegradable shopping bags. Guanzhong customized PLA+PBAT T-shirt bags, ensuring load capacity, flexible hand feel, and multi-color eco-friendly printing for brand recognition. Bags were successfully deployed in stores for long-term use.

Case 2: Brand environmental promotion bags
Some brands use biodegradable plastic bags to showcase environmental commitment. Guanzhong provides precise printing and bag design, making bags functional while serving as a medium to convey brand values and eco-friendly messaging.

From material selection to large-scale manufacturing, from customization processes to real-world applications, Guanzhong has accumulated solid and practical experience in biodegradable plastic bags. For brands seeking a stable partner, choosing a Chinese factory with manufacturing depth offers more long-term value than simply seeking the lowest price.

With the global trend of sustainable packaging development, Guanzhong will continue to focus on manufacturing, providing reliable custom printed biodegradable plastic bags solutions to more clients worldwide.