OEM Compostable Bag Factory Manufacturer

Guanzhong: Focused OEM Manufacturer of Compostable and Biodegradable Bags

Guanzhong is an OEM manufacturer specializing in compostable bags and biodegradable bags, with long-term focus on PLA+PBAT bio-based compostable materials. The company has established a complete manufacturing system for bags, from raw material processing to film production and finished bag delivery, aiming to provide brand and channel clients with a stable and sustainable compostable bag factory cooperation model.

• Self-owned industrial park, full in-factory production for bags: Guanzhong is located in Yongchun County, Quanzhou, Fujian Province, with a self-owned industrial park covering nearly 200,000 m², of which over 100,000 m² is dedicated to bag production and supporting workshops. The production of compostable bags—including film blowing, printing, bag-making, and inspection—is all completed in-house, ensuring consistent quality and stable delivery schedules.
• Production line structure tailored for bags: The company is equipped with 50 biodegradable film blowing and printing production lines and 25 professional bag-making lines, capable of producing mainstream bag types such as flat bags, vest bags, and roll bags, with a monthly combined capacity of about 1,500 tons, suitable for large-scale OEM production of custom compostable bags.
• 90,000-ton annual capacity for long-term stable supply: Guanzhong’s total annual capacity reaches 90,000 tons, with bags accounting for a significant portion, reflecting the supply capability of a mid-to-large-scale OEM factory, capable of meeting brand and channel clients’ requirements for continuous delivery and scalable production.
• Experienced frontline manufacturing team, specialized in compostable materials: The company has approximately 180 frontline production staff, long-term engaged in biodegradable bag manufacturing, with hands-on experience in PLA+PBAT film blowing, stretching, and heat sealing processes.
• Clear product focus, minimizing non-core distractions: Guanzhong positions bag products as a core business segment, and production resources and equipment are allocated around compostable bags, avoiding interference from multi-category production and ensuring product consistency and delivery stability.
• Manufacturing logic suitable for OEM cooperation rather than one-off orders: From capacity configuration to personnel structure, Guanzhong is better suited for long-term OEM cooperation, adjusting production schedules according to client orders rather than only handling short-term or scattered projects.

Guanzhong Compostable Bags Material Advantages: Why Stick to PLA + PBAT Modified System

In compostable bag manufacturing, material selection directly determines whether the product is genuinely usable, not just “visually eco-friendly.” Guanzhong has long adhered to a PLA + PBAT modified system for bag products, based on practical production stability, functional performance, and compliance requirements, rather than pursuing concept or cost alone.

• Balancing compostability with practical strength: PLA, derived from renewable plant resources, has excellent bio-based and compostable properties but lacks toughness when used alone. By blending with PBAT, the film’s elongation and tear resistance are significantly improved, making finished bags closer to the experience of traditional plastic bags in carrying, stretching, and daily use, suitable for retail, waste sorting, and household scenarios.
• Helps control bag thickness and material usage: PLA + PBAT modified materials can achieve reasonable thickness while ensuring strength, supporting material-saving designs. This helps brand clients balance environmental compliance and cost control.
• Easier to meet mainstream composting and compliance requirements: PLA + PBAT systems are widely used in industrial compostable bag products, with mature material pathways that can more easily pass mainstream composting and bio-based standards. For OEM clients entering overseas markets, this reduces compliance risk and shortens product introduction cycles.
• Adaptable to various bag types and scenarios: By adjusting the formulation ratio, PLA + PBAT systems can be flexibly applied to flat bags, vest bags, roll bags, and more, suitable for shopping, waste sorting, and household storage. This material adaptability allows Guanzhong to support diverse custom compostable bags requirements within the same material system.

Guanzhong OEM Compostable Bags Product Features and Application Areas

Guanzhong focuses on OEM manufacturing of compostable and biodegradable bags, relying on PLA + PBAT modified materials to provide products that combine eco-friendliness and practicality. Flexible customization allows products to meet brand and channel client requirements in size, thickness, printing, and bag type.

Product Features

• High toughness and tear resistance: Through PLA and PBAT blending, Guanzhong compostable bags maintain degradability while improving tensile and tear resistance, suitable for carrying and daily use.
• Multiple sizes and thickness customization: Bags can be customized in size and thickness according to client needs, meeting lightweight packaging and heavier-duty requirements such as kitchen waste or shopping.
• Brand printing and personalized customization: Supports logos, patterns, colors, and special printing, suitable for retail, e-commerce, catering, and other brand promotion scenarios while ensuring eco-friendly properties.
• Full-process controllable production: From raw material modification, film blowing, to bag-making and inspection, Guanzhong fully controls production, ensuring stable quality suitable for long-term OEM cooperation.
• OEM customization capability: Guanzhong provides full-process OEM services, from product design, mold making, sample verification to mass production. Whether vest bags, flat bags, or special function bags, dimensions, thickness, color, and printing can be flexibly customized, achieving brand-exclusive custom compostable bags.

Application Areas

• Retail and e-commerce shopping bags: Vest and flat bags widely used in supermarkets, convenience stores, e-commerce packaging, and gift bags, combining load-bearing and eco-friendly degradation properties.
• Household and public waste sorting: Roll bags and sorting bags suitable for household collection and public disposal, tear-resistant, biodegradable, and capable of printing environmental messages or brand logos.
• Pet industry bags: Biodegradable pet waste bags suitable for pet stores, online sales, and brand promotion, safe, tough, and degradable, combining functionality and eco-consciousness.
• Kitchen waste collection: Special compostable kitchen waste bags meet food contact standards, with adjustable thickness and strength to ensure safe household or catering use, and can display brand or eco-labels.
• Multi-purpose specialty bagsIncludes partitioned bags, roll bags, and other special-purpose bags suitable for different scenarios and functional needs, facilitating centralized procurement for brand clients while maintaining high compostable standards.

Guanzhong Compostable Bags Production Process and Capacity Configuration

Guanzhong has a complete production chain for compostable bags, controlling the full process from raw material to finished product, ensuring stable quality, functionality, and delivery while providing sustainable supply for OEM clients.

Production Process of Compostable Bags

• Raw material modification and composite production: Guanzhong uses PLA + PBAT modified systems, with in-house bio-based modified sheet extrusion lines and modified masterbatch production lines, ensuring controllable material performance. Materials undergo strict inspection before film blowing and bag-making to meet toughness, tensile strength, and compostability standards.
• Film blowing and printing: Equipped with 50 biodegradable film blowing and printing lines, the company produces compostable films of different thicknesses, widths, and printed patterns. Strict control of blowing and printing ensures uniform thickness and clear printing, providing a high-quality foundation for OEM custom compostable bags.
• Bag-making: Guanzhong operates 25 professional bag-making lines, supporting vest bags, flat bags, roll bags, and more. Heat sealing, cutting, and rolling are consistently controlled, ensuring toughness and size accuracy, while supporting logo printing and personalized packaging customization.
• Injection molding and special processing: For bags requiring added functions (e.g., handles or partitions), 50 fully automatic injection molding lines process these features, ensuring product functionality and durability for various applications.

Guanzhong Compostable Bags Capacity Configuration

Overall capacity
Guanzhong’s total annual capacity reaches 90,000 tons, with bags accounting for a significant portion. The complete production chain and self-owned factory structure can stably support large-scale OEM orders for custom compostable bags, ensuring long-term supply.

Professional production team
Approximately 180 long-term production staff are familiar with PLA + PBAT materials and bag-making processes. Their experience ensures each batch meets thickness, toughness, and printing standards, achieving high stability in delivery.

Production line configuration

• 50 biodegradable film blowing and printing lines, monthly capacity ~1,500 tons
• 25 professional bag-making lines, monthly capacity covering various bag types
• 3 biodegradable sheet extrusion lines and 5 modified masterbatch lines, monthly capacity ~2,000 tons
• 50 injection molding lines and 8 thermoforming lines for special functional products

This configuration ensures standard product supply while flexibly accommodating different brand client requirements in size, thickness, and printing, achieving true OEM custom compostable bags production.

Guanzhong Compostable Bags Testing Standards and International Certification

Guanzhong strictly follows domestic and international standards and certifications in compostable bag R&D and production, ensuring high safety, environmental, and compostability standards for OEM clients.

• Domestic testing standards: Guanzhong’s compostable bags pass multiple Chinese standards, including GB/T 20197, GB/T 19277.1, and GB/T 4806.7. These tests cover degradation performance, food contact safety, and material stability, ensuring safety for household and commercial use and compliance with national environmental requirements.
• International testing standards: The company’s products also pass ASTM D6866, ASTM D6400, and DIN EN 13432 standards, evaluating bio-based carbon content, bio-based ash, and industrial composting degradation performance, providing reliable evidence for export and international markets.
• Food contact safety: Guanzhong compostable bags pass US FDA food contact material tests, ensuring non-toxic, safe materials suitable for food packaging, critical for catering, e-commerce, and retail brands, balancing eco-friendliness and safety.
• International certification basis: The company has obtained multiple international certifications, including industrial composting certification, DIN industrial composting certification, DIN bio-based product certification, and US BPI degradation certification. Products are also applying for EU EN13432, US ASTM D6400, and Australia AS4736 certifications, supporting brand clients entering various international markets.
• Quality control and continuous improvement: Beyond certifications, Guanzhong has a strict quality control system. Each batch of raw materials and finished products undergoes tensile testing, thickness measurement, and degradation performance inspection, ensuring every batch of custom compostable bags meets domestic and international standards and OEM customization requirements.

With global consensus on sustainable packaging, compostable bags have evolved from “eco-concept products” to professional products requiring high standards in materials, processes, and certification. Choosing an OEM factory genuinely focused on bag manufacturing with scalable production and compliance capabilities is key for brands to establish a long-term supply chain.

Guanzhong, through long-term focus on biodegradable bags, has formed clear and stable manufacturing advantages in material systems, production capacity, and testing infrastructure. For clients aiming to steadily develop in sustainable packaging, this bag-centric OEM compostable bag factory offers long-term cooperation value.