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Three-dimensional forming material and preparation method and application thereof

A three-dimensional molding, monohydric alcohol technology, applied in the field of 3D printing, can solve the problems of increasing the printing cost of the target object, damaging the printing head, prone to warping and arching, etc.

Inactive Publication Date: 2020-07-10
ZHUHAI SAILNER 3D TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of 3D inkjet printing, there are high requirements on the photosensitivity, viscosity, shrinkage, interlayer adhesion and mechanical properties of the three-dimensional molding materials. The viscosity of the commonly used three-dimensional molding materials is too high, which often leads to It is difficult to eject smoothly from the nozzle holes of the print head, or even block the nozzle holes of the print head and damage the print head
In order to reduce the viscosity of three-dimensional molding materials, a large amount of low-viscosity light-curing monomers are usually added to three-dimensional molding materials in the prior art. However, under the premise of ensuring the smoothness of printing, the layer formed by inkjet printing is prone to warping , arching and other undesirable phenomena, resulting in the termination of printing and the need to print again, which not only reduces the forming efficiency of the target object, but also increases the printing cost of the target object

Method used

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  • Three-dimensional forming material and preparation method and application thereof
  • Three-dimensional forming material and preparation method and application thereof
  • Three-dimensional forming material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Example 1 Preparation of monofunctional double bond polyurethane acrylate PUA-1

[0081] The preparation method comprises the following steps:

[0082] Take by weighing 104.51g hydroxyethyl acrylate, 0.44g p-hydroxyanisole (polymerization inhibitor), 0.44g antioxidant 1010, 0.150g dibutyltin dilaurate (catalyst) in container, stir until p-hydroxyanisole Dissolve completely for later use to obtain a mixture of hydroxyethyl acrylate.

[0083] Weigh 222.29g of isophorone diisocyanate, add it to the reaction flask, stir, heat up to 30°C-40°C, and use a peristaltic pump to add a constant amount of hydroxyethyl acrylate mixture to the reaction flask. Dropping speed, keep the heating rate at about 1°C / min, and the maximum temperature does not exceed 70°C, about 1.5h to complete the drop, and keep warm at 60°C-70°C.

[0084] After 30 minutes of heat preservation, when the NCO value is not greater than the first expected value of 14.10%, add 108.144g propylene glycol monomethy...

Embodiment 2

[0086] Example 2 Preparation of monofunctional double bond polyurethane acrylate PUM-1

[0087] The preparation method comprises the following steps:

[0088] Weigh 79.30g of ethylene glycol monovinyl ether, 5.06g of absolute ethanol, 0.32g of p-hydroxyanisole, 0.42g of antioxidant 168, and 0.15g of dibutyltin dilaurate in a container, stir until the materials are completely dissolved and set aside , to obtain ethylene glycol monovinyl ether mixture.

[0089] Weigh 222.29g of isophorone diisocyanate, add it to the reaction flask, stir, heat up to 30°C-40°C, and use a peristaltic pump to add the ethylene glycol monovinyl ether mixture to the reaction flask in constant drops. Control the dropping speed, keep the heating rate at about 1.5°C / min, and the maximum temperature does not exceed 70°C, about 1.5h to complete the dropping, keep warm at 65°C; after holding for 30min, when the NCO value is not greater than 13.52%, cool down for standby , as the second composition.

[009...

Embodiment 3

[0092] Example 3 Preparation of monofunctional double bond polyurethane acrylate PUP-1

[0093] The preparation method comprises the following steps:

[0094] Take by weighing 91.92g ethylene glycol monoallyl ether, 0.32g p-hydroxyanisole (polymerization inhibitor), 0.42g antioxidant 1010, 0.16g dibutyltin dilaurate (catalyst) in the container, stir until completely Dissolved for later use, it is a mixture of ethylene glycol monoallyl ether.

[0095]Weigh 174.15g of toluene diisocyanate (TDI), add it to the reaction flask, stir at 20°C-30°C, use a peristaltic pump to add a constant amount of ethylene glycol monoallyl ether mixture to the reaction flask, and control the drop rate during the dropping process , keep the heating rate at about 1°C / min, and the maximum temperature does not exceed 60°C, the dropwise addition is completed in about 1.5 hours, and the temperature is raised to 60°C to keep the temperature.

[0096] After incubating at 60°C for 30 minutes, after measuri...

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PUM

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Abstract

The invention provides a three-dimensional forming material and a preparation method and application thereof. The three-dimensional forming material is prepared from the following components in percentage by mass: 5 to 50 percent of monofunctional polyurethane oligomer, 35 to 85 percent of monofunctional monomer, 0 to 30 percent of polyfunctional compound, 0.5 to 8 percent of photoinitiator and 0.2 to 5 percent of additive, wherein the monofunctional polyurethane oligomer contains a cyclic group, and the density of urethane bonds in the monofunctional polyurethane oligomer is 3.3 mol / Kg or more. The three-dimensional forming material is good in printing smoothness and has the advantages of being low in shrinkage rate, low in warping and not prone to arching, and the purposes of greatly improving the printing forming efficiency and reducing the printing cost can be achieved.

Description

technical field [0001] The invention relates to a material, in particular to a three-dimensional molding material and its preparation method and application, belonging to the technical field of 3D printing. Background technique [0002] 3D prototyping technology is also called rapid prototyping technology, or rapid prototyping technology, or additive manufacturing technology. Its basic principle is to slice the 3D model based on the slicing software, and the data processor converts the slicing data of the model into layer printing data. Taking 3D inkjet printing as an example, the controller controls the print head to eject the three-dimensional molding material according to the layer printing data, controls the curing device to perform radiation curing on the ejected molding material to form a layer, and then controls the Z-axis lifting mechanism to descend a distance of a layer thickness to complete the process. The shaping of the next layer, and layer by layer superpositi...

Claims

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Application Information

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IPC IPC(8): C08F220/58C08F220/18C08F220/36C08F220/34C08F283/00C08F216/14C08F220/40C08F220/28C08F2/48C07C269/02C07C271/24C07C271/28C07C271/34B33Y70/00
CPCB33Y70/00C07C269/02C08F2/48C08F220/58C08F283/008C07C2601/14C08F216/1458C08F220/40C07C271/24C07C271/28C07C271/34
Inventor 何兴帮杨前程余嘉
Owner ZHUHAI SAILNER 3D TECH CO LTD
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