What is the difference between PLA and PLLA

PLLA is Poly(L-Lactic Acid) and PLA is polylactic acid, which is a mixture of left – and right-handed. PLLA has a certain crystallizability, can be degraded and absorbed by the human body, PLA is basically amorphous, PLA is a real bioplastic non-toxic, non-irritating with good biocompatibility, biodegradable absorption, high strength does not pollute the environment, good plasticity and easy processing and molding. In summary, PLLA and PLA are both a kind of lactic acid, but there are differences in structure, properties and efficacy, and the following are the differences between PLA and PLLA.

What is PLLA?

Poly(L-Lactic Acid)  (PLLA) is a product made of poly-L-lactide, which has good biocompatibility. After degradation in vivo, the product is metabolized and eliminated in vitro, without harm or side effects to the human body. It is widely used in the medical field, such as disposable infusion equipment and no-disassembly surgical sutures. Drug controlled release, slow release packaging agent; Tissue engineering scaffolds, cardiovascular scaffolds, bone fixation and bone repair materials (such as absorbable screws, absorbable bone plates), microcapsules for injection, microspheres, implants and animal organ support elastomers and other materials.

Poly(L-Lactic Acid) PLLA has the characteristics of non-toxic, non-irritating, biodegradable absorption, high strength, good plasticity, and easy to process and form. The degradation period lasts for 2 to 12 months. The degradation cycle can also be changed according to the addition of different modifiers. Poly(L-Lactic Acid) PLLA is decomposed by enzymes in organisms and eventually forms carbon dioxide and water, which has good biological compatibility.

The molecular formula of PLLA (C6H8O4)n, the average molecular weight of viscosity: 0.6-1 million; Characteristic viscosity: 0.3-11dL/g; We can modulate products with different molecular weight and viscosity according to customer requirements.

What is PLA?

Polylactic acid, referred to as PLA, also known as polylactide, is a polyester polymer obtained by polymerization of lactic acid as the main raw material. It is based on renewable plant resources such as corn, cassava and other starch extraction as raw materials, through saccharification to obtain glucose, and then by glucose and lactic acid bacteria fermentation into high purity lactic acid, and finally through chemical synthesis method to synthesize a certain molecular weight of polylactic acid.

Polylactic acid has good biodegradability, and can be completely degraded by microorganisms in nature under specific conditions after use, and finally produce carbon dioxide and water. Therefore, polylactic acid is an ideal green polymer material, does not pollute the environment, is very beneficial to the protection of the environment.

PLA is made from starch containing biomass such as corn or straw cellulose, which has strong anti-mite effect and natural antibacterial properties, and the antibacterial rate against Candida albicans, Escherichia coli and Staphylococcus aureus is more than 95%. Flame retardant, low smoke, no black smoke and toxic gases; Moisture-proof, moisture-proof, quick-drying, good air permeability, especially suitable for medical care field.

After decades of development of polylactic acid production technology, its industrial production technology has become increasingly mature. Due to its reliable biosafety, biodegradability, environmental friendliness, good mechanical properties and easy processing and forming, polylactic acid has broad application prospects in biomedical polymers, 3D printing, textile industry, agricultural film and packaging industries. At present, the products developed are used in clothing (underwear, outerwear), security, electronic packaging, home appliance industry, daily necessities, sporting goods, toys, information and communication, as well as industrial (construction, agriculture, forestry, papermaking) and medical and health fields.

We are a professional supplier of degradable materials, the company has been the research and development of starch bio-based new technology as the core, is the industry’s comprehensive strength of new environmental protection materials integrated solution supplier, for customers, society and ecological environment to provide fully biodegradable materials products and services, committed to solving the earth’s increasingly severe “white pollution” problem, Reshape the green ecology of sustainable development of human and nature. Unilong Group adheres to the business philosophy of “continuously creating green value for customers, society and ecological environment”, and continues to serve the modern new material industry, create value for customers, promote social development and protect green ecology. Unilong looks forward to working with you to protect tomorrow together!

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