3 things to know about PLA biodegradable plastic

Currently, there are quite a few self-destructing products. Surely you have also heard the phrase "biodegradable PLA plastic" but it is still vague because this term is still strange in the market today and do not really understand them well. Join Hunufa to learn more about PLA biodegradable plastic in this article.

1. PLA biodegradable plastic concept

Bioplastics are plastic materials made from renewable raw materials and depending on the type, they can be biodegradable or not. Currently, bioplastics include polylactic acid (PLA) and polyhydroxyalkanoate (PHA).

sản phẩm tự huỷ

Self-destructing products | HUNUFA

Nhựa phân hủy sinh học PLA là một loại nhựa sinh học nhiệt dẻo có nguồn gốc từ thực vật như bột ngô, củ sắn, mía, tinh bột khoai tây,.. Vì thế chúng có khả năng tự phân hủy và được sử dụng để sản xuất các đồ dùng hàng ngày như bao bì đựng thực phẩm, khay đựng, cốc, chén, màng thực phẩm gói rau, dụng cụ y tế,…

PLA biodegradable plastic is a thermoplastic bioplastic derived from plants such as cornstarch, tapioca, sugarcane, potato starch, etc. Therefore, they are self-degradable and used to production of everyday items such as food packaging, trays, cups, food film, vegetable wrapping, medical instruments, etc.

2. PLAbiodegradable plastic production process

PLA biodegradable plastic is produced by lactic acid polymerization. Manufacturers will ferment sugar taken from renewable sources such as corn starch, tapioca starch, sugar cane, potato starch... and collect lactic acid.

According to Professor Bert Sels of the Center for Catalysis and Surface Chemistry, lactic acid is introduced into a reactor and condensed into "lactide" under vacuum and high temperature conditions.

Then, this lactide under the action of catalyst and temperature decomposed into chains and linked together to form PLA. In the production of PLA plastic, a metal catalyst is still used to generate waste in intermediate steps (the step to generate lactide).

Today, to increase economic efficiency, scientists have come up with the idea of ​​using zeolite (a porous mineral made from aluminum, oxygen, silicon) as a catalyst in the reactor to guide the process. conversion of lactic acid to lactide. Metals that generate waste in intermediate steps are removed.

According to postdoctoral fellow Michiel Dusselier, “By selecting a specific form of zeolite based on its pore shape, we were able to convert lactic acid into the building blocks for PLA without creating byproducts. larger than the hole of the zeolite”.

Recycling

3. Pros and cons of PLA biodegradable plastic

2.1 Advantages of biodegradable plastic PLA

Self-destructing straws

Self-destructing straws | HUNUFA

-Natural materials: PLA is produced from ingredients derived from renewable materials such as corn starch, cassava roots, sugarcane, potato starch... so it is environmentally friendly, safe for users, suitable for the production of daily necessities and medical instruments.

This is a renewable raw material, after use they are decomposed by microorganisms into biomass at waste treatment plants and used as microbial fertilizer on crops.

- Biodegradable: PLA converts into biofertilizer after being treated for industrial biodegradation. PLA plastic surface is well permeable, making it easy for organisms to penetrate to promote natural decomposition. Under the right conditions, under the action of microorganisms, PLA plastic can decompose into carbon dioxide, water, and biohumus, which is good for plants and does not pollute the environment.

- Non-toxic: PLA does not produce toxic volatiles when burned like traditional plastics, so it does not pollute the environment.

- Short decomposition time: only a few months or years. While the decomposition time of traditional plastic can be up to hundreds, thousands of years. Therefore, PLA creates positive effects on the environment, unlike traditional plastics.

3.2 Disadvantages of PLA biodegradable plastic

- Impact on food sources: The raw materials for the production of PLA are mainly starch from corn or cassava, which can affect the food source and cause controversy regarding the use of food sources for production. plastic export.

- PLA plastic can only be decomposed in industrial processing conditions: Most products using PLA have this feature, they will decompose under conditions of temperature, microorganisms, etc. to meet certain standards. .

- If PLA plastic is not handled properly, it can affect the quality of recycled plastic: PLA plastic, if mixed with recycled materials, will affect the quality of the product after being recycled.

- High cost production: PLA production process requires expensive raw materials and requires a lot of investment in complex production technologies, so the production cost of products from PLA can be higher than that of products. from petroleum-based plastics.

- There are not many PLA manufacturers on an industrial scale yet, and PLA production is currently in a state of supply and demand. The production of PLA plastic on an industrial scale requires high technology and high cost, so the cost is higher than that of ordinary plastics.

4. Application of PLA biodegradable plastic in life

4.1. Application in tissue engineering

Tissue implantation connects living cells to the scaffold system through biological materials. As a result, living cells can multiply and multiply in different directions to help regenerate living tissues.

Biomaterials help replace living tissues and benefit organ transplants. Biopolymer, especially PLA plastic is the optimal choice in this case.

PLA plastic has been approved by the US Food and Drug Administration for clinical use in humans. It has been successfully tested in tissue regeneration in organs such as bones, cartilage, bladder, liver, mechanical heart valves.

4.2. Application as carrier material, drug delivery

PLA plastic has high biocompatibility, biodegradation, heat treatment and high mechanical strength, solubility in organic solvents, so it is widely used in drug delivery materials.

PLA is used as a conduit for tetanus, as a conduction aid for oral insulin sprays for type 2 diabetes, as a conduit for the anticancer drug paclitaxel, as a conduit for 5 FU and paclitaxel. Traditional for the treatment of cancer…

In addition, denatured PLA is also found in implantable products or used in materials for manufacturing medical devices such as absorbable threads, profiles, pins, plates, disposable infusion devices, delivery packaging. drugs, ... or applied in skin treatments such as scar treatment on the face, fat atrophy, etc.

4.3. Applications in the field of packaging

Modified PLA is also found in materials used to make trays, food containers, thin film production for food packaging, supermarket bags, plates, cups, spoons, etc.

Self-destruct bag

Self-destruct bag | HUNUFA

Especially modified PLA is reinforced with bentonite, coated with microcrystalline cellusose, silicate is resistant to UV rays and visible light (the cause of product denaturation), so it is also used as food preservation packaging. . In addition, this type of packaging also has antibacterial properties, suitable for preserving raw foods such as vegetables, meat, fish, etc.

And also applied in many other fields such as agriculture, electronics, automobile transport, ..

Some PLA biodegradable products are available at Hunufa Company such as: biodegradable straws, biodegradable bags.
You can see product details here.

Or download App Hunufa on your phone to order quickly.

Download link here:  https://invite.cnvloyalty.com/hunufa

Above is some basic information about PLA biodegradable plastic. Hope to be able to meet the information you need. Follow Hunufa to update more information regularly.

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