Why SLA photosensitive resin material is preferred for 3D printing model

- Jul 25, 2018-

Which material is most commonly used for 3D printing, it is estimated that the first material that is familiar to people in the 3D printing industry is the SLA photosensitive resin. Photosensitive resins have been popularly introduced due to their characteristics and cost performance. Photosensitive resin is a kind of 3D printed plastic material. It is similar to ABS material. It has smooth surface, high precision, surface paintable and hardness. Photosensitive resin is very suitable for printing hand model, such as the model of the design, but also has special requirements in addition to the appearance, such as high temperature resistance or high toughness.

Photosensitive resin is formed by SLA/DLP technology. SLA is also called photocuring. It uses ultraviolet light or other light beams to cure liquid photosensitive resin. Photosensitive resin, literally speaking, is a light-sensitive resin material that cures quickly after light irradiation.

In a deeper sense, the photosensitive resin is a mixture of a photoinitiator, a monomeric polymer and a prepolymer, which is cured by focusing at a specific wavelength of ultraviolet light. Compared to SLA, DLP printed items have a smooth surface and high molding quality, so many DLP models are positioned as jewelry. Like the e-key printing, there is a German DLP medical grade photosensitive resin. The e-key printed medical photosensitive resin has passed the EU EU and the US FDA certification, which is absolutely trustworthy, so the price of 3D printing is relatively more expensive. The characteristics and applications of the photosensitive resin are described in detail below.

Characteristics of photosensitive resin

The photosensitive resin is generally in a liquefied state, and the printed object using the material generally has the characteristics of high strength, high temperature resistance, and waterproofness. However, the photosensitive resin material does not easily cause hardening for a long period of time, and the material has a certain toxicity, and it needs to be closed and stored in a state where it is not used.

In addition, the price of the photosensitive material is relatively expensive compared to the desktop-grade PLA, and at the same time, it is easy to cause waste because it needs to be poured into the container during use.