Ph.D. Chemist Explains 3D Printer Resin
What is photopolymer 3D printing?
Photopolymerization is the curing process that’s characterized by the use of ultraviolet (UV) light. In 3D printing, it’s used to cure the deposited material. When exposed to UV light, the deposited material cures.
What type of plastic is photopolymer resin?
A photopolymer is a type of polymer that changes its physical properties when exposed to light. In the case of 3D printing, these are typically liquid plastic resins that harden when introduced to a light source, such as a laser, a lamp, a projector or light-emitting diodes (LEDs).
What is photopolymer material?
A photopolymer or light-activated resin is a polymer that changes its properties when exposed to light, often in the ultraviolet or visible region of the electromagnetic spectrum.
Who invented photopolymer?
The first synthetic photopolymer for imaging applications was patented (US Patent 2,610,120) by Louis Minsk et al of Eastman Kodak in 1952. The invention was entitled “Photosensitization of Polymeric Cinnamic Acid Esters”. The photopolymer was essentially a photoresist based on polyvinyl cinnamate.
What plastic is UV resin?
A large number of UV-curable resins are commercially available including polyesters, epoxies, urethanes, silicones and polyethers. The majority of these resins are free-radical curing acrylic-functionalized oligomers which usually cure in a matter of seconds but only in the presence of radiation.
What is photopolymer liquid?
Photopolymers come in the form of a liquid that solidifies (polymerises) within seconds when exposed to UV light of a specific wavelength. The hardness of the cured polymer depends on the chemistry and can range from soft rubber-like to hard plastic.
What is a photopolymer plate?
Simply put, a photopolymer plate is a sheet of polymer with one side that is light sensitive. The digitally created design is transferred to a photo negative that is placed on top of the sheet of polymer. It is then exposed to light in a controlled exposing unit.
Is photopolymer a thermoset?
Photopolymers are thermoset materials, or polymers, that change properties when exposed to ultraviolet light. These materials can be clear or opaque, flexible and rigid, and can be specially formulated to accommodate unique application needs.
How is UV curing resin made?
UV curable resin is composed of monomers, oligomers, photopolymerization initiators, and other additives. When exposed to ultraviolet light (UV light), the photoinitiator undergoes a chemical reaction that allows it to bond independent oligomers and monomers into a more complex chain. These chains are called polymers.
Which printer uses photopolymer liquid to construct models?
The Polyjet print head uses liquid photopolymers to create your models. It is similar to a regular inkjet printer.
Which rapid prototyping technology that uses photopolymer?
Stereolithography, which was one of the first rapid prototyping technologies, is a method that uses photopolymer in a vat. A laser generates an ultraviolet beam that solidifies focused surface areas of the photopolymer.
What is vat vat polymerization?
Vat Photopolymerization is a type of additive manufacturing technology that produces 3D objects by selectively curing photopolymer liquid resin using light-activated polymerization.
Are SLA fumes toxic?
Resins also naturally give off fumes, and unless you work in a well-ventilated area, molecules from the fumes will get into your lungs and cause irritation there, too. Harmful when exposed to eyes or ingested: Never let resin near or into your eyes or mouth unless they’re specifically marked as non-toxic.
Are Resin prints stronger than FDM?
When it comes down to strength, FDM printed parts tend to be stronger than resin printed objects. This is both true in terms of resistance to impact and tensile strength. Almost all popular filaments like ABS, PLA, PETG, Nylon, and Polycarbonate outperform regular resin prints.
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