As the most mature and widely used bio-based biodegradable material, The are rapidly replacing traditional petroleum-based plastics (such as PS, PP, and PET) in food packaging applications. They are particularly suitable for single-use tableware, cold drink cups, cling films, food trays, and yogurt containers, aligning perfectly with global "plastic ban" policies and sustainable consumption trends.
Derived from renewable plant starches including corn, sugarcane, and cassava through fermentation and polymerization processes, Food Grade PLA Granules absorb CO₂ during production, resulting in a 60–70% lower carbon footprint compared to PET throughout their lifecycle. Under industrial composting conditions (58–70°C, high humidity, active microorganisms), they completely degrade into CO₂, H₂O, and organic matter within 90 days, though degradation occurs more slowly in natural environments, emphasizing the importance of proper disposal.
The core characteristics of Food Grade PLA Granules in food packaging include
|
Performance Category |
Characteristics |
Significance for Food Packaging |
|
Safety |
Approved for food contact by FDA, EU 10/2011, GB 4806.6-2016 |
Direct contact with dry/wet foods, non-toxic and odorless |
|
Transparency |
Light transmittance >90%, comparable to PS/PET |
Premium appearance, ideal for product display |
|
Gloss |
Glass-like surface smoothness |
Enhances product premium perception (e.g., high-end salad boxes) |
|
Rigidity |
High modulus, excellent hardness |
Suitable for rigid containers (cups, boxes, trays) |
|
Processability |
Compatible with blow molding, injection molding, thermoforming, cast film production |
Works with existing PET/PS packaging production lines |
|
Odor |
Odorless, with slight sweet fragrance |
Doesn't affect food flavor |
Despite PLA's significant advantages, its inherent limitations are being overcome through material modification and structural design, enabling large-scale applications in cold drink cups, salad boxes, and yogurt containers. As one of the most viable alternatives to petroleum-based plastics, the full environmental value of Food Grade PLA Granules depends on the development of backend composting infrastructure and proper consumer disposal practices, creating a truly circular solution for sustainable food packaging.
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