Biodegradable PLA Resin Suppliers
Source polylactic acid (PLA) resin from verified B2B suppliers on Towobo. PLA is a bio-based, industrially compostable thermoplastic derived from fermented plant sugars — primarily corn starch or sugarcane. It is the leading commercially available biodegradable resin for injection-moulded cutlery, food service containers, packaging films, and 3D printing filament. This guide covers PLA grades, processing requirements, compostability certifications, and how to evaluate PLA resin suppliers.
PLA grades and their applications
PLA is available in several grades differentiated by D-isomer content, which governs crystallinity, heat resistance, and mechanical properties. Standard PLLA (high L-isomer, low D-content, below 2% D): semi-crystalline, higher heat resistance than amorphous PLA, suitable for thermoformed trays, injection-moulded rigid packaging, and technical applications. Amorphous PLA (higher D-content, above 8% D): transparent, lower heat resistance, faster crystallisation with nucleating agents — used for clear cold cups, film, and window film for packaging. Heat-resistant PLA (typically PLLA with crystallisation-enhancing nucleating agent and fill): suitable for hot-fill containers and food service applications up to approximately 80–85°C. Standard PLA without heat treatment has a heat deflection temperature (HDT) of only 50–60°C — not suitable for hot beverages or hot-fill applications without modification. For injection-moulded disposable cutlery, standard extrusion-grade PLA (MFI 5–20 g/10 min at 190°C/2.16kg) is the primary specification. For blown film, a lower MFI grade (2–5 g/10 min) with adequate melt strength is required. NatureWorks (US) and Total Corbion (Netherlands) are the dominant producers; Chinese producers including Haizheng Biomaterials are growing in volume.