compostable bioplastics

As businesses and consumers across India pivot away from single-use plastics, terms like bioplastics, biodegradable, and compostable plastics are frequently used. However, not all eco-friendly plastics are created equal.

Understanding the differences between bioplastics and certified compostable plastics is essential for choosing packaging solutions that align with government regulations like Central Pollution Control Board (CPCB) standards and environmental sustainability goals.

What are Bioplastics?

Bioplastics are plastic materials produced from renewable biomass sources such as corn starch, sugarcane, tapioca root, or vegetable fats rather than traditional petroleum or fossil fuels.

Common Types of Bioplastics

  1. Bio-based (Non-biodegradable): Made from plant sources like sugarcane, but chemically structured like traditional PET or HDPE. They do not break down naturally in the environment.
  2. Biodegradable Bioplastics: Polymers like PLA (Polylactic Acid) and PHA (Polyhydroxyalkanoates) that naturally break down over time through biological processes into water, carbon dioxide, and biomass.

Key Takeaway: Just because a material is a “bioplastic” does not automatically mean it will break down in your home compost pile.

What Are Compostable Plastics?

Compostable plastics are a specialized sub-category of biodegradable plastics designed to break down under specific microbial conditions, leaving behind non-toxic, organic matter, carbon dioxide, and water without generating harmful microplastics.

To be legally sold in India as compostable packaging, materials must comply with IS/ISO 17088 standards and receive certification from the Central Pollution Control Board (CPCB).

How Fast Do Compostable Plastics Break Down?

  • Commercial / Industrial Composting: Breaks down within 90 to 180 days at elevated temperatures (50°C–60°C).
  • Home Composting: Specially formulated plant-starch products break down naturally in ambient soil within a few months without industrial heating.

Bioplastics vs. Compostable Plastics: Key Differences

Understanding these key distinctions ensures compliance with Indian plastic waste management rules and prevents greenwashing: 

Feature

Bioplastics

Compostable Plastics

Primary Material

Bio-based plants or partially fossil-fuel-derived

Renewable plant starches (Cornstarch, Cassava, PLA blends)

Breakdown Process

May require decades or specific microbial activity

Breaks down in under 180 days

Environmental Residue

May leave chemical or microplastic residues

Leaves zero toxic microplastics or harmful chemical traces

Indian Regulation Standard

Varies by polymer type

Must meet IS/ISO 17088 & CPCB Compliance

Major Benefits of Compostable Plastics for Businesses

Switching from conventional polybags to certified compostable solutions offers critical business and regulatory advantages: 

1. Full Regulatory Compliance

Under India’s Plastic Waste Management Rules, traditional thin single-use plastic carry bags are banned. CPCB-certified compostable bags provide a fully legal, government-approved alternative for retailers and manufacturers.

2. Elimination of Toxic Microplastics

Unlike conventional plastics that fragment into microscopic toxic particles that contaminate soil and marine ecosystems, certified compostable materials organic compound degradation returns nutrients back to the earth.  

3. Lower Carbon Footprint

Manufacturing plant-starch resins requires significantly less fossil-fuel energy than producing virgin petroleum plastics, noticeably reducing corporate Scope 3 carbon emissions.

4. Boosted Brand Reputation & Customer Loyalty

Consumer preference for sustainable packaging continues to grow. Utilizing eco-friendly carry bags, e-commerce mailers, and trash liners demonstrates clear environmental responsibility.

Common Applications of Compostable Packaging

Compostable plastics are versatile alternatives for high-volume retail and industrial packaging:

  • Retail & Grocery Carry Bags: Durable, tear-resistant shopping bags that replace traditional polybags.
  • Garbage Liners & Waste Bags: Ideal for organic kitchen waste, degrading along with food scraps in municipal composting facilities.
  • E-Commerce Courier Mailers: Water-resistant shipping bags tailored for eco-conscious online brands.
  • Agricultural Nursery Bags: Plantable grow bags that naturally dissolve into the soil as plants mature.

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