PLA raw material PLA is one of the most important raw materials for the production of bioplastics. Poly Lactic Acid (PLA) is widely used form of thermoplastic polymer material.
PLA Raw Material
Product Details
Advantages
(1) PLA is a new type of biodegradable material, which has good biodegradability and can be completely degraded by microorganisms in nature after use, eventually generating carbon dioxide and water, without polluting the environment, which is very beneficial to the protection of the environment and is a recognized environmentally friendly material.
(2) Good mechanical properties and physical properties. PLA is suitable for various processing methods such as blow molding, thermoplastic, etc. It is easy to process and very widely used.
(3) Good compatibility and degradability. PLA is also widely used in the field of medicine, such as disposable infusion appliances, non-disposable surgical sutures, etc., and low molecular PLA is used as drug slow release packaging agent, etc.
(4) In addition to the basic properties of biodegradable plastics, PLA also has its own unique characteristics. The strength, transparency and resistance to climate change of conventional biodegradable plastics are not as good as those of ordinary plastics.
(5) PLA has similar basic properties to petrochemical synthetic plastics, which means that it can be used in a wide range of applications. PLA also has good gloss and transparency, comparable to films made from polystyrene, that other biodegradable products cannot provide.
(6) PLA has the best tensile strength and ductility, and PLA can be produced in a variety of common processes.
(7) PLA film has good permeability, oxygen permeability and dioxygen permeability, and it also has the property of isolating odor.
(8) When incinerating PLA, its calorific value of combustion is the same as that of incinerating paper, which is half that of incinerating conventional plastics (such as polyethylene), and incinerating PLA definitely does not release toxic gases such as nitrogen compounds and sulfides. The human body also contains lactic acid in monomer form, which indicates the safety of this decomposable product.
Disadvantages
(1) PLA has a large number of ester bonds and is poorly hydrophilic, which reduces its biocompatibility with other substances;
(2) The relative molecular weight distribution of the polymerization product is too wide, PLA itself is a linear polymer, which makes the strength of PLA material often does not meet the requirements, high brittleness, low heat deflection temperature (54 ℃ under 0146MPa load), poor impact resistance;
(3) Degradation cycle is difficult to control;
(4) The price of lactic acid and the polymerization process determine the high cost of PLA.
Application areas
1, Packaging
Mainly used in packaging bags, packaging film, medical film, foam, tableware and so on.
PLA has been used in rigid packaging for fruits and vegetables, eggs, cooked food and baked goods.
Most agricultural films are currently made of PE, but replacing them with biodegradable polymers such as PLA would reduce both environmental concerns and plastic film waste.
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