Pretreated dual-curing 3D printing resin and pretreatment method thereof

Abstract

The invention discloses pretreated dual-curing 3D printing resin and a pretreatment method thereof. The resin comprises the following raw material components in percentage by weight: 19%-78% of oligomer, 1%-9% of radical initiator, 0.5%-5% of cationic initiator, 0.5%-5% of hybrid curing photoinitiator, 0.2%-4% of aid, 10%-35% of reactive diluent, 13%-62% of cationic monomer and 5%-20% of hybrid monomer, wherein the sum of the weight percentages of the components is 100%. The printing effect comparable with that of a high-energy SLA sunken 3D printer is obtained, the shrinkage rate is low, the curing performance is good, the mechanical property is excellent, color changing is convenient, and the problems that a sunken printer trough is huge, the needed resin amount is large, and the humidity control requirement is high are solved.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a pretreatment dual-curing 3D printing resin and a pretreatment method thereof. Background technique [0002] With the popularization of 3D printing technology, DLP / SLA 3D printing technology is being used more and more, and more and more requirements are put forward for the physical properties of 3D printing products. Photocuring 3D printing technology is a new type of material that has emerged in recent years. The processing and forming method is based on the three-dimensional model, and the method of directly printing the solid model by adding materials layer by layer. This technology can print out personalized parts with diverse shapes and appearances without making molds, which greatly simplifies the production process of products. [0003] China CN201310498194.8 discloses a kind of light-curing 3D printing hybrid system photosensitive resin, including the following mas...

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Problems solved by technology

[0003] China CN201310498194.8 discloses a kind of light-curing 3D printing hybrid system photosensitive resin, including the following mass ratio of raw material components: oligomer A, oligomer B and acrylates in a mass percentage of 50:15:35 The mixture accounts for 70%-90% of the total mass of active components; the reactive diluent accounts for 10%-30% of the total mass of active components; oligomer A, oligomer B and acrylates are 50:15 by mass: The total mass of the mixture of 35 and active diluent is 100%; additives: cationic initiators account for 1-10% of the total mass of active components, free radical initiators account for 1%-6% of the total mass of active components, accelerators account for 1%-8% of the total mass of active components, the leveling agent accounts for 0.05%-1.0% of the total mass of active components, and the defoamer accounts for 0.05%-1.0% of the total mass of active components; the invention can print high Accuracy, objects of any shape, and then still can not reach energy and high energy (20000-35000mw / cm 2 ) SLA sunken 3D printers have a printing effect comparable to that of some products currently printed, with high shrinkage, poor curing performance, poor mechanical properties, and inconvenient color changes. The amount of resin required for printing is large, and the humidity control requirements high