In recent years, bioplastic has become one of the most discussed materials in conversations about sustainable development. From food packaging and shopping bags to agricultural products, bioplastic is often presented as a “green” alternative to conventional plastic. However, in practice, many people – including those working within the plastics industry – still do not fully understand what bioplastic is made from, how it differs from traditional plastic, and why materials under the same “bioplastic” label can have very different properties and performance.
In this article, we start from the fundamentals: what bioplastic is, the raw materials used to produce it, and the most common types of bioplastic currently available, providing a structured and practical perspective for both industry professionals and general readers.
1. What Is Bioplastic?
1.1. Definition of Bioplastic
Bioplastic refers to plastic materials that are derived partially or entirely from renewable biological sources, rather than exclusively from petroleum-based feedstocks like conventional plastics. These renewable sources can include starch, sugar, cellulose, vegetable oils, or even polymers synthesized by microorganisms.
One clarification we often need to make when consulting customers is that bioplastic does not automatically mean biodegradable plastic. These two concepts are related but not identical. A material can be classified as bioplastic simply because of its biological origin, even if it does not degrade easily in natural environments.
In industrial practice, some bioplastics have polymer structures very similar to traditional plastics. The key difference lies in the source of carbon used to produce the monomers. This approach allows manufacturers to reduce reliance on fossil resources while maintaining familiar mechanical and processing characteristics.
1.2. How is bioplastic different from normal plastic?
First, we need to differentiate between bioplastic and ordinary plastic. Bioplastics are usually made from renewable resources like plant sugars. For example, corn is the primary source of this sugar in the United States. Cane sugar, sugar beets, wheat, and potatoes are used in other countries. Otherwise traditional plastics, on the other hand, are produced from non-renewable materials like cellulose, coal, natural gas, salt, and crude oil.
Related: What are some of the advantages and disadvantages of bioplastics
Bioplastics are used for various applications, including non-disposable carpets, plastic plumbing, phone cases, vehicle heat insulation, 3D printing, and surgical devices. Meanwhile, plastic containers, refillable water bottles, medical items, outdoor furniture, toys, suitcases, and automobile parts are some of the many everyday things that are produced using PP plastic (a type of traditional plastics).
Compared to normal plastics, bioplastics are renewable and better for the environment. There is a potential solution to the environmental and health problems caused by plastic trash. A recent study by americanoceans.org states that over nine billion tons of plastic have been manufactured, consumed, and discarded worldwide since the 1960s. As news of the plastic pollution of our oceans spreads, new alternatives to petroleum-based products have appeared. Bioplastic's many advocates point to its environmental benefits, including lower carbon emissions and a shorter decomposition time. Traditional plastics typically contain the hormone disruptor bisphenol A (BPA), whereas bioplastic does not.
How is bioplastic different from normal plastic?
2. What are bioplastics made from?
To properly understand bioplastic, we must address the fundamental question: what raw materials are used to produce it? In reality, bioplastic can be manufactured from a range of biological resources, and the degree of “bio-based” content may vary significantly depending on the formulation.
2.1. Plant-Based Raw Materials
The most common raw materials for bioplastic production are starch and sugar, which are abundantly available in crops such as corn, sugarcane, potatoes, and cassava. These agricultural resources provide fermentable carbohydrates that serve as carbon sources for polymer synthesis.
In large-scale production, starch or sugar is processed into intermediate compounds, which are then converted into polymers such as polylactic acid (PLA). One of the main advantages of these feedstocks is supply stability, particularly in regions with strong agricultural industries.
Another important source is cellulose, the primary structural component of plant cell walls. Cellulose can be extracted from wood or agricultural by-products such as straw and bagasse. Utilizing such residues supports resource efficiency and aligns with circular economy principles.
Potato starch bioplastic is one of the most famous bioplastics
2.2. Other Biological Sources
Beyond plant-derived carbohydrates, certain bioplastics are produced through microbial synthesis. Under controlled fermentation conditions, specific bacteria can accumulate polymer granules inside their cells as a form of energy storage. These polymers are later extracted and purified for industrial use.
In addition, vegetable oils such as soybean oil, palm oil, or rapeseed oil can be chemically modified to create bio-based polymers suitable for various applications. The selection of feedstock typically depends on geographic availability, cost considerations, and targeted material performance.
In practice, there is no single universal formula for producing bioplastic. The choice of raw material is closely tied to regional supply chains and intended product characteristics.
2.3. Does Bioplastic Completely Avoid Petroleum?
A common question we frequently receive is: Does bioplastic completely eliminate the use of petroleum? The answer is: not always.
Currently, there are two main categories on the market. The first consists of 100% bio-based bioplastics, where all carbon atoms in the polymer originate from renewable biological sources. The second category includes partially bio-based plastics, which combine renewable feedstocks with fossil-derived components.
This blending approach often addresses practical limitations. Pure bio-based polymers may face challenges in mechanical strength, thermal resistance, or processability. Incorporating a portion of conventional material can enhance performance and broaden the range of industrial applications.
From a technical standpoint, such hybrid solutions should not be viewed as setbacks, but rather as transitional strategies in the gradual shift toward more sustainable material systems.
3. Common Types of Bioplastic Today
After understanding what bioplastic is made from, the next step is to examine the major types currently used in the market. Each type has distinct characteristics and performance profiles.
3.1. PLA (Polylactic Acid)
PLA is currently the most widely used bioplastic. It is typically produced from corn starch or sugarcane through a fermentation process that generates lactic acid, followed by polymerization.
In practical applications, PLA offers good transparency and relatively straightforward processing using standard techniques such as injection molding and film extrusion. This versatility explains its broad use in food packaging, disposable products, and 3D printing.
However, based on real-world usage experience, PLA may not be suitable for applications requiring high heat resistance or strong impact performance. Careful evaluation of service conditions is therefore essential before selecting this material.
3.2. PHA (Polyhydroxyalkanoates)
Unlike PLA, PHA is synthesized directly by microorganisms. Different bacterial strains can produce various types of PHA with adjustable properties. PHA is recognized for its specialized applications, but production costs remain a significant barrier to large-scale adoption. As research advances and manufacturing efficiency improves, PHA may become more competitive in the future.
3.3. Starch-Based Bioplastics
In addition to PLA and PHA, starch-based bioplastics represent another important category, especially in short-life-cycle applications. Technically, starch itself is not plastic. However, when modified and blended with plasticizers, it can be transformed into materials that behave similarly to thermoplastics.
In practical manufacturing, starch-based bioplastics are commonly used for products with short service durations, such as shopping bags, simple packaging materials, and seasonal agricultural products. One of their primary advantages lies in the abundance and relatively low cost of raw materials, particularly in regions with strong agricultural output.
From a technical standpoint, however, starch-based materials have limitations. Their mechanical strength and moisture resistance are typically lower than those of more advanced bioplastics. As a result, starch is often incorporated as a component in composite systems or used in bio fillers rather than serving as the sole structural material.
4. Applications of Bioplastic in Practice
The decision to adopt bioplastic in production is rarely based on environmental considerations alone. In reality, material selection depends heavily on functional requirements, cost structure, and product positioning. Bioplastic has gained the strongest foothold in sectors where technical demands are moderate, but environmental expectations and brand image carry substantial weight.
4.1. Packaging
Packaging is currently the most prominent application of bioplastic. Products such as food containers, disposable cutlery, cups, and film packaging increasingly incorporate bio-based materials to align with sustainability goals. Bioplastic is particularly suitable for products with short usage cycles. In such cases, renewable sourcing provides marketing advantages and supports compliance with tightening environmental regulations in many markets.
However, proper material selection remains essential. Not all packaging formats are compatible with all types of bioplastic, especially when high-temperature filling or long shelf-life is required.
Disposable packaging, containers, straws, bags, and bottles are made from bioplastics.
4.2. Agriculture
In agriculture, bioplastic is primarily applied in mulch films, plant ties, and seasonal cultivation products. One practical benefit is the potential to reduce long-term plastic residue accumulation in farmland.
Many modern agricultural models are gradually integrating bio-based materials as part of broader sustainability strategies. That said, environmental conditions such as humidity, soil composition, and climate must be carefully evaluated before implementation. Selecting an unsuitable grade can compromise product performance during critical growing periods.
4.3. Consumer and Light Industrial Products
Beyond packaging and agriculture, bioplastic is gradually entering selected consumer and light industrial applications. These are typically products that do not demand high heat resistance or heavy structural load capacity but prioritize renewable sourcing and environmental positioning.
In real-world consulting scenarios, we often advise manufacturers to conduct side-by-side evaluations between bioplastic and conventional plastic before making decisions. Choosing bioplastic solely based on trend or perception may increase costs without delivering proportional functional benefits.
5. Advantages and Limitations of Bioplastic
5.1. Advantages
The most evident advantage of bioplastic lies in its renewable raw material base. By utilizing plant-derived or biological carbon sources, bioplastic contributes to diversifying feedstock supply and reducing reliance on fossil resources. In addition, bioplastic can enhance corporate sustainability strategies. For many brands, material selection is no longer purely a technical matter, but also a reflection of long-term environmental commitments and market positioning.
5.2. Limitations
Despite its potential, bioplastic presents certain limitations. Production costs are often higher than those of conventional plastics, particularly for high-performance grades. Furthermore, not all bioplastics are fully compatible with existing processing equipment. In practice, manufacturers may need to adjust processing parameters or modify formulations to achieve stable production performance.
For these reasons, bioplastic should not be viewed as a universal replacement, but rather as a strategic material option suitable for specific applications where renewable sourcing adds measurable value.
6. The Future of Bioplastic
As environmental pressures and regulatory frameworks continue to evolve, bioplastic is expected to grow both technologically and commercially. Ongoing research focuses on improving mechanical properties, optimizing production efficiency, and expanding application ranges.
From an industry standpoint, the key lies not only in producing bioplastic, but in developing application-driven solutions tailored to market requirements. Combining bio-based polymers with additives and advanced processing technologies will be essential for unlocking the full potential of these materials.
Combining bio-based polymers with additives and advanced processing technologies will be essential.
7. Conclusion
Bioplastic is far more nuanced than it may appear in simplified discussions. Understanding what bioplastic is made from, how it is formulated, and where it performs best is essential for making informed decisions. When carefully selected and properly applied, bioplastic can play a meaningful role in sustainable material strategies—serving not as a short-term trend, but as part of a long-term transition in the plastics industry.
8. FAQ – Frequently Asked Questions About Bioplastic
What is the most common raw material used to produce bioplastic?
=> Starch and sugar derived from crops such as corn and sugarcane are among the most common feedstocks, particularly for producing PLA.
Can bioplastic completely replace conventional plastic?
=> At present, bioplastic cannot fully replace conventional plastic across all applications. Its suitability depends on specific technical and economic requirements.
What should companies consider before switching to bioplastic?
=> Manufacturers should evaluate mechanical requirements, processing compatibility, cost structure, and long-term performance before transitioning to bio-based materials.
9. About EuroPlas' Bioplastic Products
Proud to be one of the largest manufacturers of filler masterbatch in the world, EuroPlas products are being trusted in more than 95 countries. With the increasing trend of using bioplastics, EuP has launched the BiOMates plastic filler label, based on bioplastic bioplastics, to meet the needs of this growing market. Our products include:
Contact us for more details, or send your inquiries to [email protected]. We are pleased to answer any questions from you!