Top Eco-friendly Plastic Bag Wholesaler and Compostable Plastic Bag Manufacturer

Guanzhong, as a leading compostable plastic bags manufacturer in China, is gradually becoming a long-term partner for an increasing number of international brands, e-commerce platforms, wholesalers, and distributors. We not only provide products, but also a mature, implementable, and replicable eco-friendly packaging solution, making procurement truly worry-free, controllable, and sustainable.

Guanzhong Factory Strength and Large-Scale Manufacturing Advantages

In the field of environmentally friendly packaging, true competitiveness is never just about “environmentally friendly materials,” but rather the comprehensive strength of large-scale manufacturing capabilities, a stable delivery system, and sustainable quality control. Guanzhong has built its mature factory system around these three elements.

Currently, Guanzhong boasts a 100,000-square-meter modern production plant, encompassing raw material storage areas, compounding areas, blown film workshops, bag-making workshops, printing workshops, testing laboratories, and finished product storage areas, forming a complete closed-loop manufacturing process. The factory is equipped with multiple automated blown film lines, bag-making lines, and flexographic printing lines, supporting high-frequency, multi-specification, and multi-batch production scheduling.

In terms of production capacity, Guanzhong’s annual comprehensive production capacity is approximately 90,000 tons of environmentally friendly plastic products. Simultaneously, the factory employs approximately 180 experienced frontline production staff and technicians, a significant portion of whom possess years of experience in processing biodegradable materials, enabling them to precisely control key process nodes such as material melting, stretching, cooling, and molding.

More importantly, Guanzhong has a long-standing and mature OEM/ODM service system. It not only manufactures according to customer drawings, specifications, and brand standards, but also provides professional advice on product structure, material formulation, thickness matching, packaging, and end-application adaptation.

Regarding quality and compliance, Guanzhong’s production processes strictly adhere to international standards, supporting compostable material systems that meet requirements such as ASTM D6400 (US composting standard) and EN 13432 (EU composting standard). It can also assist customers in connecting with third-party testing organizations (such as SGS, Intertek, and TÜV) to complete material and finished product testing and verification.

Guanzhong’s manufacturing system for compostable and environmentally friendly plastic bags

Raw Material System: Controlling Environmental Performance from the Source

Guanzhong primarily uses internationally compostable bio-based and biodegradable resin systems, including PLA (polylactic acid), PBAT (aliphatic-aromatic copolyester), and plant-based starch composites. These materials are widely used in food packaging, garbage bags, shopping bags, e-commerce express bags, and other applications, and can be converted into water, carbon dioxide, and biomass residue under industrial composting conditions, leaving no persistent microplastics.

Before raw materials enter production, the factory conducts basic performance tests, including melt index, tensile strength, ductility, odor stability, and batch consistency assessment, ensuring predictability of different batches of materials in actual processing.

Process Control: Enabling Biodegradable Materials to Possibly Possess Strength

Compared to traditional PE/HDPE plastics, biodegradable materials are more sensitive to temperature control, shear force, cooling rate, and elongation ratio.

Guanzhong’s engineering team has established a mature database of processing parameters for different material systems, precisely controlling the melt temperature range, screw speed, and traction ratio during film blowing to ensure that the film maintains good mechanical properties while also considering flexibility and user experience. During the bag-making process, an automatic tension control system and heat-sealing parameter adjustment ensure that the bag opening strength and sealing performance meet actual transportation and load-bearing requirements.

Quality Inspection: From Process Monitoring to Finished Product Verification

During production, Guanzhong has an online quality inspection system that conducts real-time spot checks on film thickness uniformity, appearance flatness, edge sealing strength, and printing adhesion. In the finished product stage, tensile tests, drop tests, load-bearing tests, and compostability verification samples are retained to ensure that product performance meets customer standards and regulatory requirements.

Regarding compostability, Guanzhong refers to the testing framework of ASTM D6400 and EN 13432, including the material’s disintegration rate, mineralization rate, and heavy metal residue assessment under composting conditions.

One-stop Customization Service: From Logo to MOQ

Many consumers and businesses tend to think that biodegradable bags are expensive and unsuitable for daily large-scale use. Especially in the early market stage, this impression was widespread. However, with the maturation of material technology and the expansion of production scale, this view no longer reflects reality.

• Raw Material Cost Gap is Narrowing: PLA and PBAT were expensive initially, but with improved global supply chains and increased production scale, costs have dropped significantly. Under bulk production conditions, compostable bags are now only 1.3–1.8 times the cost of traditional LDPE bags, fully manageable for businesses.
• Usage Value Far Exceeds Price Difference: Companies should assess the overall value of bags, not just the price. Compostable bags help businesses achieve ESG goals, enhance public image, and reduce secondary pollution in food waste disposal. Some European cities using compostable bags have seen an average 8–15% reduction in food waste management costs, demonstrating their potential economic benefits.
• Bulk Orders Can Further Reduce Costs: Small-scale orders may seem costly, but by optimizing bag type, thickness, mold design, and choosing mature factories for production, costs can be reduced by an additional 10–20%. For example, reducing thickness from 22μm to 18μm or switching to roll bags saves material while improving production efficiency.
• Regulatory Pressure Drives Optimal Cost Choice: Many countries restrict single-use PE plastic bags. Businesses must choose between biodegradable, reusable, or paper bags. PLA+PBAT compostable bags often offer the best balance of cost, performance, waterproofing, and toughness, especially in food waste scenarios.

One-stop customization service: from logo to MOQ

Logo & Graphic Customization: Balancing Brand Expression and Environmental Standards

Guanzhong supports various environmentally friendly flexographic printing processes, employing water-based or low-VOC ink systems. This ensures color clarity and durability while also meeting food contact safety and environmental regulatory requirements. Clients can provide brand files in AI, PDF, PSD, and other formats. The engineering team will conduct layout adaptation and printing feasibility assessments, adjusting color differences and line details during the proofing stage to ensure mass production results are consistent with brand visual standards.

Color Customization: Matching the Brand Visual System

Color is not only an aesthetic issue but also a crucial element of brand identity. Guanzhong supports Pantone color matching and custom color mixing, providing physical color swatches for confirmation during the proofing stage to reduce the risk of color differences during mass production. For brands emphasizing a natural and environmentally friendly aesthetic, low-saturation, semi-transparent, or primary color textures are also available to highlight sustainable packaging attributes.

Customized Size and Thickness: Adaptable to Different Usage Scenarios

Guanzhong can customize bag structures and sizes for various applications, including but not limited to:

• Supermarket and retail shopping bags
• Fresh produce and food packaging bags
• Restaurant takeout bags and garbage bags
• E-commerce express delivery bags and clothing packaging bags

Regarding thickness, reasonable thickness ranges and material ratios can be designed based on load-bearing requirements, usage frequency, and cost targets, ensuring performance while avoiding excessive packaging and material waste.

MOQ: Minimum Order Quantity of 1 Ton of Raw Materials, Balancing Flexibility and Manufacturing Efficiency

Guanzhong’s customized MOQ is set at 1 ton of raw materials. This threshold is within a reasonable range in the industry, balancing flexibility and economies of scale:

For small and medium-sized brands and new projects, it avoids excessive inventory pressure due to a high MOQ;

For the manufacturing side, a minimum order quantity of 1 ton ensures material blending stability and production efficiency, which is beneficial for controlling quality fluctuations and cost structure.

Guanzhong has become a trusted eco-friendly plastic bag wholesaler for a growing number of international clients primarily because:

• We possess a verifiable and tangible manufacturing scale and production capacity;
• We understand the processing challenges of biodegradable materials and have established a mature and stable process system;
• We offer full-process customization support, from logo, pattern, color, size, thickness to MOQ;
• We are committed to serving our clients with transparency, professionalism, and long-term partnerships, rather than short-term transaction-oriented approaches.

If you are looking for a manufacturing company that not only provides eco-friendly plastic bags but also offers long-term partnerships in material compliance, manufacturing stability, brand customization, and supply chain reliability, Guanzhong is a choice worth serious consideration.