Core Keywords: Fully Degradable Packaging Bags
Auxiliary Keywords: Fully‑degradable Plant‑fiber Bags, Compostable Packaging Bags, Eco‑friendly Paper Packaging Bags
Source Note：This guide references EU PPWR (EU 2025/40), UK HMRC Plastic Packaging Tax guidance, EN 13432, ASTM D6400, BPI documents, GB/T 19277.1‑2025 and peer‑reviewed papers. All data can be verified via official channels.
Introduction
Global plastic‑control regulations are tightening. Many buyers confuse bio‑based, photodegradable and true compostable packaging. This article clarifies definitions, materials, certifications and export compliance for cross‑border packaging procurement.
1. Definition & Technical Boundaries
Fully degradable packaging bags break down into CO₂, water and biomass within 180 days under industrial composting conditions (58±2 °C, 50‑60 % humidity, aerobic environment), without harming plant growth.
Photodegradable: Only breaks into microplastics, not fully biodegraded, restricted in many regions.
Bio‑based: Raw materials come from renewable resources, but does not guarantee compostability. Bio‑based PE is non‑degradable.
Fully degradable / Compostable: Requires third‑party certification such as EN 13432 or ASTM D6400.
Compostable performance cannot rely on manufacturer self‑declaration; valid certification is mandatory per BPI standards.
2. Four Mainstream Materials
PLA is made from corn starch or cassava. It offers high transparency, food‑contact safety and good tensile strength. Degradation only occurs under industrial composting. Suitable for food bags and transparent packaging.
PBAT is fossil‑based yet biodegradable. It features high flexibility and tear resistance, and is mostly blended with PLA for shopping bags, garbage bags and agricultural mulch films.
Plant‑fibre materials derive from bamboo pulp, wood pulp, bagasse and straw. They are recyclable and compostable with good breathability, ideal for inner bags, food bags and dust‑proof bags.
Starch‑based materials use corn or potato starch. They are cost‑effective compostable options with moderate strength and need modification for disposable bags and agricultural use.
Common blends: PLA+PBAT for balanced strength and flexibility; PLA+starch for lower costs; plant fibre with PLA lamination for water‑resistant compostable paper packaging.
Academic studies show PBAT/PLA/CaCO₃ blends deliver better environmental performance. PLA/PPC blends feature lower global warming potential.
3. Key Application Scenarios
Food & Catering: Disposable take‑away, snack and bakery packaging. Food‑contact certificates (EU 10/2011, FDA) are required. PLA fits transparent food display; plant‑fibre works for breathable bakery packaging.
Agriculture: Seedling bags, mulch films and fruit sleeves. Products can be tilled into soil after use. Plant‑fibre seedling bags can be planted directly together with crops.
Fertilizer & Chemical: Heavy‑duty sacks for 25‑50 kg goods. Use only PLA/PBAT degradable lamination for moisture resistance to keep full compostability.
E‑commerce Logistics: Compostable courier bags qualify for Amazon plastic‑free preferential programmes. 50‑60 μm PLA/PBAT bags support 5‑8 kg loading. Raw‑material costs are 50‑100 % higher than PE bags.
Export‑oriented Brands: EU PPWR requires recyclable packaging from 2030. UK Plastic Packaging Tax stands at £228.82/tonne (Apr 2026) for packaging with less than 30 % recycled plastic. Paper‑based compostable packaging with low plastic content qualifies for tax exemption.
4. Core Certification Standards
EN 13432 (EU Industrial Compost)
EU harmonised standard. Four requirements: chemical heavy‑metal limits; ≥90 % biodegradation within 180 days; ≥90 % disintegration after 12 weeks; passing OECD 208 plant toxicity test. Certificates are issued by TÜV Austria, DIN CERTCO etc.
ASTM D6400 (US Industrial Compost)
BPI certification is built on ASTM D6400 for plastics and ASTM D6868 for coated paper. Certified products must achieve full disintegration, biodegradation and zero ecotoxicity. Updated revisions took effect in 2026.
GB/T 19277.1‑2025 (China Test Standard)
Chinese test method standard aligned with ISO 14855. It is not a product certification mark. Export goods still need EN 13432 or ASTM D6400/BPI.
5. Export Compliance Document Checklist
- Valid compostable certification (EN 13432 / ASTM D6400‑BPI)
- Third‑party test reports: biodegradation, disintegration, heavy‑metal and ecotoxicity
- Material composition list
- MSDS for sea shipment
- REACH/SVHC declaration for EU
- Food‑contact test report (if applicable)
- Standard compostable marks for target markets
- Certificate of Origin (CO / FORM A)
6. Key Notes & Common Mistakes
1. Bio‑based does not equal compostable; always check formal certification.
2. “Degradable” marketing claims without certification are regarded as false advertising by EU and US FTC.
3. EN 13432 and ASTM D6400 apply to industrial compost only. Home‑compost needs separate certifications such as OK Compost Home.
4. Paper bags with ordinary PE lamination lose compostability; only PLA/PBAT lamination is acceptable.
5. Certificates must match actual shipped products in material and thickness; formula changes require re‑certification.
6. UK Plastic Packaging Tax rules shall be followed for UK shipments.
7. Complete small‑batch trial production before mass orders to verify performance and printing quality.
7. Summary
Compostable packaging is a major compliance solution under global plastic‑ban policies. Compostable performance must be verified by EN 13432, ASTM D6400/BPI or equivalent standards. PLA, PBAT, plant‑fibre and starch‑based materials serve different industries. Prepare full compliance documents for export and avoid common misoperations mentioned above.
Nearly 20‑year manufacturer of fully‑degradable plant‑fibre bags and eco‑friendly paper packaging. We supply plant‑fibre bags, PLA/PBAT laminated paper sacks and starch‑based bags. We provide GB/T 19277 test reports and assist customers with EN 13432, BPI, food‑contact and REACH documentation. Confirm target‑market requirements and complete sample validation before mass production.
FAQ
Q1: Difference between fully degradable bags and ordinary degradable bags?
A: Fully degradable bags pass EN 13432 / ASTM D6400 with over 90 % biodegradation in 180‑day industrial compost. Ordinary degradable products may only fragment into microplastics.
Q2: PLA or PBAT for shopping bags?
A: Pure PBAT is soft but lacks stiffness. PLA+PBAT blends (70:30 ~ 60:40) deliver balanced strength and flexibility, which is the mainstream solution.
Q3: Certifications for EU export?
A: EN 13432 industrial compost certification is essential. Prepare REACH/SVHC declaration, food‑contact report, material list and MSDS as supporting files.
Q4: Cost gap versus PE bags?
A: Raw‑material costs of compostable bags are 1.5‑2 times higher than PE bags, subject to formula and order volume.
Q5: Can GB/T 19277 report be used directly for export?
A: No. It is only a domestic test report. EU requires EN 13432; US requires ASTM D6400/BPI.