{
  "opening": "PolyLite PLA's heat-deflection temperature is 60 °C (140 °F) under a 0.45 MPa load and 58 °C (136 °F) under a 1.8 MPa load. That is a bending test, not compost. NatureWorks says Ingeo resin composts in municipal and industrial facilities that control heat, moisture, and air, after testing to ASTM D6400 and EN 13432. The same page gives no lifespan for a part on a shelf, in a landfill, or in a backyard pile.",
  "question": "Does PLA biodegrade, or does it just break down over time?",
  "slug": "pla_degrade",
  "useCase": "pla",
  "useCaseLabel": "PLA",
  "updated": "2026-10-27",
  "shortAnswer": "PolyLite PLA's heat-deflection temperature is 60 °C (140 °F) under a 0.45 MPa load and 58 °C (136 °F) under a 1.8 MPa load. That is a bending test, not compost. NatureWorks says Ingeo resin composts in municipal and industrial facilities that control heat, moisture, and air, after testing to ASTM D6400 and EN 13432. The same page gives no lifespan for a part on a shelf, in a landfill, or in a backyard pile.",
  "recommendedMaterials": [
    "pla"
  ],
  "printerConsiderations": [
    "Industrial compost is a managed pile that holds heat, moisture, and air on purpose. A backyard bin, a landfill, and a shelf are different places. NatureWorks describes the managed facility, not those three.",
    "NatureWorks says the BPI and Seedling logos apply to listed Ingeo grades as supplied from the factory. Colorants or additives added later have to pass the tests again. A customer cannot put the logo on a finished product without certifying that product.",
    "Softening in a hot car is [PLA outdoors](/answers/pla_outdoor) and [creep](/answers/pla_creep). Wet filament that snaps is [old filament](/answers/old_filament). Scrap handling is [recycling](/answers/recycling)."
  ],
  "pros": [
    "The compost claim is quoted from NatureWorks, with the two standards that page names.",
    "Heat deflection stays labeled as a bending test, so it is not mistaken for a compost temperature."
  ],
  "cons": [
    "No year count for a printed part indoors, outdoors, or in a landfill is on the NatureWorks page read for this answer.",
    "The three PLA rows are print settings. None of them is listed on NatureWorks' resin certificate."
  ],
  "community": "One comment says PLA is only compostable in an industrial setting, at a specific pressure and temperature, and that a compost mark would send people to a home composter. Another says there are effectively no filaments available that are recyclable or biodegradable. The pressure and temperature in the first comment are not given as numbers.",
  "related": [
    "old_filament",
    "pla_outdoor",
    "recycling",
    "pla_creep"
  ],
  "faq": [
    {
      "q": "Does PLA biodegrade, or does it just break down over time?",
      "a": "PolyLite PLA's heat-deflection temperature is 60 °C (140 °F) under a 0.45 MPa load and 58 °C (136 °F) under a 1.8 MPa load. That is a bending test, not compost. NatureWorks says Ingeo resin composts in municipal and industrial facilities that control heat, moisture, and air, after testing to ASTM D6400 and EN 13432. The same page gives no lifespan for a part on a shelf, in a landfill, or in a backyard pile."
    },
    {
      "q": "Will a PLA print compost in the garden?",
      "a": "NatureWorks describes municipal and industrial facilities that regulate temperature, moisture, and aeration, and it names ASTM D6400 and EN 13432 for the listed Ingeo resin grades as supplied. A garden pile is not that facility. [Outdoors](/answers/pla_outdoor), [creep](/answers/pla_creep), [old filament](/answers/old_filament), and [recycling](/answers/recycling) are the other ways PLA changes or gets discarded."
    },
    {
      "q": "Does the heat-deflection number mean the part falls apart at that temperature?",
      "a": "It means a test bar bends under a stated load. For PolyLite PLA that is 60 °C (140 °F) at 0.45 MPa and 58 °C (136 °F) at 1.8 MPa, ISO 75, checked 21 October 2026. Glass transition on that sheet is 61 °C (142 °F). Those are heat figures. They are not a compost clock."
    }
  ],
  "sources": [
    {
      "title": "NatureWorks regulatory affairs, industrial composting",
      "url": "https://natureworksllc.com/resources/regulatory-affairs",
      "kind": "manufacturer"
    },
    {
      "title": "PolyLite PLA technical data sheet V5.4",
      "url": "https://cdn.shopify.com/s/files/1/0548/7299/7945/files/PolyLite_PLA_TDS_EN_V5.4.pdf",
      "kind": "datasheet"
    },
    {
      "title": "Bambu PLA Basic technical data sheet",
      "url": "https://cdn.shopify.com/s/files/1/0584/7236/6216/files/Bambu_PLA_Basic_Technical_Data_Sheet_bf3411ce-be39-4db7-9669-1b4671d2196b.pdf",
      "kind": "datasheet"
    },
    {
      "title": "Anycubic PLA technical data sheet V3.0",
      "url": "https://cdn.shopify.com/s/files/1/0698/1235/5357/files/ANYCUBIC_TDS_PLA_V3.0.pdf",
      "kind": "datasheet"
    },
    {
      "title": "Community source, r/3Dprinting 10uymj3",
      "url": "https://www.reddit.com/r/3Dprinting/comments/10uymj3/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/3Dprinting 1afowey",
      "url": "https://www.reddit.com/r/3Dprinting/comments/1afowey/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/3Dprinting 11unx71",
      "url": "https://www.reddit.com/r/3Dprinting/comments/11unx71/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/3Dprinting 189sbhv",
      "url": "https://www.reddit.com/r/3Dprinting/comments/189sbhv/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/3Dprinting sabx15",
      "url": "https://www.reddit.com/r/3Dprinting/comments/sabx15/",
      "kind": "reddit"
    }
  ],
  "recommendations": [
    {
      "rank": 1,
      "note": "Catalog nozzle 190–230 °C (374–446 °F) and bed 25–60 °C (77–140 °F). Heat dataset checked 21 October 2026 lists heat deflection 60 °C (140 °F) at 0.45 MPa and 58 °C (136 °F) at 1.8 MPa, ISO 75, Vicat 63 °C (145 °F) under ISO 306, and glass transition 61 °C (142 °F). Drying on the technical data sheet is 55 °C (131 °F) for 6 h, checked 18 October 2026. No compost certification is stored on the row.",
      "brand": "Polymaker",
      "product": "Polylite PLA",
      "material": "PLA",
      "url": "/brand/polymaker/polylite-pla",
      "nozzle": "190–230 °C (374–446 °F)",
      "bed": "25–60 °C (77–140 °F)",
      "pricePerKg": null,
      "datasheetUrl": "https://cdn.shopify.com/s/files/1/0548/7299/7945/files/PolyLite_PLA_TDS_EN_V5.4.pdf",
      "affiliateUrl": null
    },
    {
      "rank": 2,
      "note": "Technical data sheet nozzle 190–230 °C (374–446 °F) and bed 35–45 °C (95–113 °F). Drying stored from that sheet is 50 °C (122 °F) for 8 h. The row does not store a compost standard. Print temperatures are not a biodegradation claim.",
      "brand": "Bambu Lab",
      "product": "PLA Basic",
      "material": "PLA",
      "url": "/brand/bambu-lab/pla-basic",
      "nozzle": "190–230 °C (374–446 °F)",
      "bed": "35–45 °C (95–113 °F)",
      "pricePerKg": null,
      "datasheetUrl": "https://cdn.shopify.com/s/files/1/0584/7236/6216/files/Bambu_PLA_Basic_Technical_Data_Sheet_bf3411ce-be39-4db7-9669-1b4671d2196b.pdf?v=1734060943",
      "affiliateUrl": null
    },
    {
      "rank": 3,
      "note": "Catalog nozzle 190–230 °C (374–446 °F) and bed 55–65 °C (131–149 °F), Open Filament Database, verified 13 October 2026. Drying maximum stored on the row is 50 °C (122 °F). No compost certification is stored. NatureWorks' resin list is not a certificate for this spool.",
      "brand": "Anycubic",
      "product": "PLA Basic",
      "material": "PLA",
      "url": "/brand/anycubic/pla-basic",
      "nozzle": "190–230 °C (374–446 °F)",
      "bed": "55–65 °C (131–149 °F)",
      "pricePerKg": null,
      "datasheetUrl": "https://cdn.shopify.com/s/files/1/0698/1235/5357/files/ANYCUBIC_TDS_PLA_V3.0.pdf?v=1757585748",
      "affiliateUrl": null
    }
  ]
}