PLA, or Polylactic Acid, is a biodegradable polyester derived from lactic acid and renewable resources. We see and use it without realizing how smoothly it blends into our lives. Do you know why PLA is produced in abundance?
Because polylactic acid is eco-friendly, it has a minimal carbon footprint and is cost-efficient for manufacturers. It has multiple implications across various industries and does not harm its surroundings. Let’s understand the meaning and properties of PLA in detail!
Types of PLA
Based on composition and molecular structure, polylactic acid has three major types. Their fermentation process impacts the type of PLA obtained. Here are the three major types of PLA
1. PLLA
With a dominant composition of L-lactic acid, PLLA provides a strong yet flexible nature to the products. It is implemented in medical applications and implants. It cannot withstand more than 80 degrees Celsius of heat and crumbles if put under high pressure.
2. PDLA
Its composition has a high amount of D-lactic acid, and it is blended with PLLA to make stiff and stronger products. PDLA is commonly used to make 3D printing models, and it can withstand up to 180 degrees Celsius of melting temperature.
3. PDLLA
PDLLA is a non-crystalline polymer that consists of D-lactic and L-lactic acids. It cannot withstand more than 60 degrees Celsius of heat. Its structure is meshy, applicable across multiple industries to create medical equipment, flower pots, and flexible prototypes. Out of these three polylactic acids, PDLLA is the quickest to biodegrade.
Advantages of PLA (Polylactic Acid)
Products developed using polylactic acid can be found in many industries. Despite having distinguished types, PLA has multiple advantages throughout its use cases:
1. Environment Friendly
Unlike plastic, PLA is an environment-friendly substance derived from renewable resources. After its use, PLA products leave a minimal carbon footprint that eventually contributes to nature.
2. 3D-Printable
PLA has the ideal molecular structure to support 3D printing. Its substitutes, PETG and ABS, adversely affect nature because they are either petroleum-based or non-recyclable. At the same time, PLA is a sustainable option for getting efficient quality prototypes with vibrant colors.
3. Safe for Use in Food Containers
PLA products consist of biodegradable properties, which keep your food safe for consumption. The packaging industry leverages this advantage and develops disposable food packaging materials on a large scale.
4. Weldable
Like metals, PLA is weldable and can be used to fuse your products and fix cracks. The methods involved here are solvent, friction, and heal welding. It ensures that two or more PLA components can be merged using industry-standard practices.
5. Recyclable and Compostable
Under industry-level composting, PLA-based products can be recycled and composted, too. Such products end up in commercial composting facilities where they are put to good use.
6. Available in a number of colors and composite options
Due to being naturally transparent, manufacturers mix PLA with filaments so that the product can adapt to multiple bold colors. Herein, added pigments ensure that the end product has a visually appealing aesthetic.
7. Odorless Processing
PLA does not emit any foul smell like other plastics. Instead, it emits a sweeter odor during the melting stage. Alternatives of PLA, such as ABS, are known to release acidic odor during the processing stage and may expose you to respiratory issues.
Applications of PLA Polylactic Acid
PLA is a sustainable alternative for your everyday needs. Here are some of the most popular applications of PLA across industries:
1. Healthcare
Apart from the packaging of medicines and healthcare equipment, PLA is utilized in several areas of healthcare. This includes implants, stitching, bone grafts, and tissue regeneration. PLA is non-toxic and environmentally friendly; hence, its basic structure causes no harm to your body.
2. Textiles and Fabrics
PLA-based clothing is a popular alternative to synthetic fibers. It is a cheaper option for manufacturers and is UV-resistant. Thus, the clothing industry has a new spiking section for customers who are shopping for PLA-based clothing.
3. Packaging Industry
Packaging materials such as shopping bags, cups, bottles, and boxes are manufactured using PLA. This use case is popular in the food and beverage industry as well because PLA is non-toxic and resists microbacteria.
4. Disposable Items
Do you know why traditional plastic is eradicated from almost every industry? This is due to its non-biodegradable nature. Its environment-friendly substitute: PLA-based disposable items are used as paper cups, cans, and disposable bags.
5. Automotive Industry
To eliminate the usage of petroleum-based plastics, PLA-based sustainable car parts are being introduced in this domain. PLA is lightweight and UV-resistant compared to its substitutes. Hence, it is gaining popularity in the automotive industry.
6. Toys and Stationery Items
Using the method of 3D printing, multiple layers can be melted and piled in an organized manner. This helps to mold toys, pens, and caps in various shapes. PLA is one of the most preferred substances to make toys because it does not harm children’s skin, regardless of how often they come in contact with it.
Frequently Asked Questions
Is PLA 100% biodegradable?
While most PLA products are biodegradable, the process is slow. The success rate depends on the product’s molecular main chain and methyl groups.
What is the raw material of PLA?
Fermented sugar is the main raw material of polylactic acid. It can be obtained from multiple sources, such as sugarcane, corn, and cassava. As these are obtained from nature, they slash down the toxicity factor and become a sustainable solution.
Is PLA better than plastic?
Yes, PLA is made from renewable resources, unlike plastic, wherein the main component is crude oil. Polylactic acid-based products are competitively priced and reduce carbon emissions by a huge margin.
Is PLA waterproof?
PLA products are not waterproof. They tend to swell or degrade when introduced to excessive water. It is advisable to keep certain PLA products, such as prints, masks, and pots, away from water.
Does PLA release toxins?
Being a bioplastic, PLA does not release toxins, making it the most suitable material for eco-conscious manufacturing. Additionally, it releases minimum volatile organic compounds (VOCs) during the heating processes.
