Complete Guide to Custom Compostable Bags

Material Selection: Balancing Puncture Resistance, Tear Resistance, and Environmental Performance

The material of a trash bag directly determines its strength, durability, and degradation performance. Guanzhong’s biodegradable trash bags are mainly made of PLA+PBAT biobased composite materials, offering the following advantages:

• Biodegradable and Eco-Friendly
  Made from biobased raw materials, non-toxic and odorless, capable of degrading in industrial composting or soil environments, meeting ASTM D6400 and EN13432 international standards. Under standard industrial composting conditions, PLA+PBAT bags typically degrade completely within 90–180 days without leaving plastic residues.
• Tear Resistance and Strength
  PBAT enhances film flexibility, preventing tearing under moisture and sharp objects, while PLA ensures shape stability. With dual-layer co-extrusion and uniform thickness control, high tensile and tear resistance are achieved, suitable for both household and industrial scenarios.
• Wide Range of Applications
  Lightweight bags are suitable for offices and bedrooms, medium bags for kitchens, and heavy-duty industrial bags for construction or garden waste. Material selection and thickness design ensure optimal biodegradability and strength for different needs.

Structural Design: Optimization for Load Capacity, Seal, and Ease of Use

The structure of a trash bag directly affects usability, leak resistance, and durability. Guanzhong offers various structural designs for different scenarios:

• Flat-Bottom Trash Bags – Maximum Load Capacity
  Flat-bottom bags evenly distribute weight across the bottom, preventing stress concentration and leakage. Suitable for industrial bins and construction sites. A 56-gallon (90×110 cm) flat-bottom bag can hold approximately 40 lbs of waste, about 20% stronger than star-seal bags. Dual-layer co-extrusion ensures uniform thickness and balanced stress distribution.
• Star-Seal Trash Bags – Enhanced Leak Resistance
  Multi-layer heat-sealed bottom (120° folded corners) prevents liquid leakage effectively, ideal for kitchens, bathrooms, and food-related areas. A 13-gallon star-seal bag (55×65 cm) improves resistance to oil and liquid leaks by about 40% compared to flat-bottom bags, ensuring safe waste handling.
• Drawstring Trash Bags – Convenience Focus
  Drawstring bags are designed for single-hand operation with high-strength polyester cords (pull strength over 15 lbs). Mainly used in households and offices, a 30-gallon (70×90 cm) drawstring bag can increase waste handling efficiency by roughly 50%. The drawstring has been durability-tested to withstand 1,000 opening cycles without breaking.

Through engineering-based structural design, Guanzhong maximizes trash bag load capacity, leak protection, and operational convenience, providing high-performance solutions for customers.

Matching Trash Bag Size and Capacity: Refined Selection Based on Application Scenarios

The thickness, capacity, and strength of custom trash bags must match their intended use. Guanzhong provides detailed guidelines to optimize performance in different scenarios:

Thickness (Specification) Guide

• Lightweight (1.0–1.5 mil, approx. 25–38 μm)
  Suitable for light waste in bedrooms or offices, such as paper or plastic bottles. Economical but limited puncture resistance, with a recommended load under 10–12 lbs.
• Medium (1.6–2.0 mil, approx. 40–50 μm)
  Suitable for household kitchens and commercial use, can withstand wet waste, peels, and minor sharp objects. Load capacity typically 18–22 lbs.
• Heavy (2.0 mil+, over 50 μm)
  Suitable for property management, construction sites, and industrial waste, capable of high puncture resistance (>50 psi), ideal for heavy-duty waste disposal.

Capacity and Size Selection

• Small (8–10 gallons, 45×50 cm)
  Suitable for bedrooms, cars, or small offices, holding approximately 10 lbs of waste.
• Medium (13 gallons, 55×65 cm)
  Standard kitchen size, suitable for households, restaurants, or light industrial waste, holding approximately 20 lbs.
• Large (56 gallons, 90×110 cm)
  Designed for industrial bins or construction sites, holding approximately 40 lbs of waste.

By matching thickness, capacity, and material, trash bags can balance cost-effectiveness and safety while maintaining biodegradability and high load-bearing performance.

Compliance and Environmental Standards: Ensuring Quality and Market Access

For exports and bidding projects, environmental certification and material compliance are essential. Guanzhong products fully meet domestic and international standards:

• Environmental and Degradation Certifications
  • EU EN13432 Industrial Composting Standard
  • US ASTM D6400 Compostable Certification
  • OK Compost (EU)
  • RoHS and REACH for non-toxic, eco-friendly compliance
• Factory and Quality System Certifications
  • ISO9001 Quality Management System
  • Environmental traceability system
  • Material batch retention and testing system

Guanzhong’s in-house laboratory conducts rigorous testing of tensile strength, elongation at break, heavy metal migration, and biodegradation performance to ensure all products meet market entry standards, providing reliable assurance for export and high-end projects.

Customization Process: Systematic Management from Requirements to Mass Production

Guanzhong implements a systematic process to ensure efficient production and quality control for custom trash bags:

• Requirement Confirmation: Define bag usage, capacity, thickness, load requirements, and functionalities (leak-proof or drawstring).
• Design and 3D Modeling: Develop 3D models for bag type, printing plan, and logo layout, simulating usage to verify feasibility.
• Mold and Sample Production: Mold fabrication takes approximately 7 days. Samples are produced for testing, including tensile, tear, and heat-seal performance.
• Mass Production and Quality Control: Bulk production occurs in 100,000 m² standardized workshops, strictly following ISO9001 and environmental traceability systems. Thickness, tensile strength, printing quality, and biodegradability are rigorously tested.
• Packaging and Delivery: Finished products are packaged, labeled, and shipped per client requirements, with after-sales follow-up to ensure smooth implementation.

Why Choose Guanzhong: Professional Capability and Reliable Production

Selecting an experienced manufacturer improves customization efficiency and product quality. Guanzhong offers industry-leading production capacity and extensive customization experience:

• Factory Strength
  Located in Yongchun, Quanzhou, Fujian, Guanzhong covers nearly 200,000 m² with production workshops exceeding 100,000 m². Facilities include R&D buildings, pelletizing, film blowing, injection molding, and thermoforming workshops.
• Production Capacity
  • Injection molding: 50 fully automated lines, 2,000 tons/month
  • Film blowing: 50 lines; bag-making: 25 lines, 1,500 tons/month
  • Biobased composite extrusion: 3 lines; masterbatch: 5 lines, 2,000 tons/month
• Customization Capabilities
  Offers custom printed biodegradable plastic bags and custom compostable bags in various specifications, thicknesses, colors, and patterns. OEM/ODM services with 7-day mold production and 15-day manufacturing, minimum order 1 ton of raw material.
• Project Coverage
  Products are suitable for household waste bags, pet waste bags, kitchen bags, and industrial waste, meeting domestic and international market demands.

Guanzhong is committed to being a leading manufacturer of biodegradable trash bags, providing high-quality custom printed biodegradable plastic bags and custom compostable bags through professional experience, advanced production systems, and strict environmental standards. By combining scientific material selection, engineering structural design, precise size matching, comprehensive certifications, and systematic customization processes, customers receive safe, durable, and environmentally friendly trash bags. Whether for households, restaurants, or industrial applications, Guanzhong delivers reliable, efficient, and sustainable solutions.