Knowledge

The difference between 3D printer consumables



Polylactic acid (PLA) is a new type of biodegradable material made from starch raw materials proposed by renewable plant resources such as corn. Good mechanical and physical properties. Polylactic acid is suitable for various processing methods such as blow molding and thermoplastic molding. It is easy to process and widely used. Good compatibility and degradability. Polylactic acid is also widely used in the field of medicine, such as disposable infusion sets, disposable surgical sutures, etc., low molecular weight polylactic acid as a drug sustained release packaging agent.


In addition to the basic properties of biodegradable plastics, polylactic acid (PLA) has its own unique characteristics. Traditional biodegradable plastics are not as strong as ordinary plastics in terms of strength, transparency, and resistance to climate change. The basic physical properties of polylactic acid (PLA) and petrochemical synthetic plastics are similar, that is, it can be widely used in the manufacture of various applications. Polylactic acid also has good gloss and transparency, comparable to films made from polystyrene, and is not available in other biodegradable products. Polylactic acid (PLA) has the best tensile strength and ductility. Polylactic acid can also be produced in various common processing methods, such as: melt extrusion, injection molding, blown film forming, foam molding and vacuum forming. The widely used polymers have similar forming conditions, and in addition, they have the same printing properties as conventional films.


ABS resin is currently the largest and most widely used polymer. It combines the properties of PS, SAN and BS organically, and has excellent mechanical properties of toughness, hardness and rigid phase balance. ABS is a terpolymer of acrylonitrile, butadiene and styrene, A represents acrylonitrile, B represents butadiene, and S represents styrene.


ABS plastic is generally opaque, its appearance is light ivory, non-toxic, odorless, with tough, hard, and rigid characteristics. It burns slowly, the flame is yellow, and there is black smoke. After burning, the plastic softens and burns, giving a special Cinnamon smell, but no melt dripping.


ABS plastic has excellent comprehensive performance, excellent impact strength, dimensional stability, electrical properties, wear resistance, chemical resistance, dyeability, molding processing and mechanical processing. ABS resins are resistant to water, inorganic salts, alkalis and acids, are insoluble in most alcohols and hydrocarbon solvents, and are readily soluble in aldehydes, ketones, esters and certain chlorinated hydrocarbons.


Printing ABS material is different from printing PLA polylactic acid:

The smell of cotton is scented when printing PLA, unlike the bad smell of puncturing nose like ABS.

The PLA can print large part models without a heated bed without corners.

The processing temperature of PLA is 200 ° C, and the ABS is above 220 ° C.

PLA has a low shrinkage and performs well even when printing larger sized models.

PLA has a lower melt strength, the print model is easier to shape, the surface gloss is excellent, and the color is gorgeous.

PLA is a crystal and ABS is an amorphous. When you heat the ABS, the gel liquid is slowly converted without a change in state. PLA, like frozen water, goes directly from solid to liquid. Because there is no phase change, ABS does not absorb the thermal energy of the nozzle. Part of the PLA, the risk of nozzle clogging is greater.