阅读说明：本技术 3d喷墨打印用粘结剂 (Binder for 3D ink-jet printing ) 是由 邢金龙 张宏凯 韩文 何龙 于 2020-05-29 设计创作，主要内容包括：本发明涉及3D喷墨打印用粘结剂,所述3D喷墨打印用粘结剂由结剂体系、表面活性剂体系及蒸馏水制备而成,所述3D喷墨打印用粘结剂的pH值为7.5～8.5。本发明3D喷墨打印用粘结剂有效地克服了现有技术存在的问题,所述3D喷墨打印用粘结剂具有如下特性：25℃粘度为8.0～13.0mpa.s,粘度低,流动性优异；20℃表面张力为28～32mN/m,表面张力低,流动性好,对粉末材料的渗透和润湿性能好；抗弯强度≥10MPa,粘结强度高,且本发明产品生产成本低、在生产和使用过程中,无有毒有害气体产生,更加绿色环保。(The invention relates to a binder for 3D ink-jet printing, which is prepared from a binder system, a surfactant system and distilled water, wherein the pH value of the binder for 3D ink-jet printing is 7.5-8.5. The binder for 3D ink-jet printing effectively overcomes the problems in the prior art, and has the following characteristics: the viscosity at 25 ℃ is 8.0-13.0 mpa.s, the viscosity is low, and the fluidity is excellent; the surface tension at 20 ℃ is 28-32 mN/m, the surface tension is low, the fluidity is good, and the permeability and the wettability to powder materials are good; the bending strength is more than or equal to 10MPa, the bonding strength is high, the product has low production cost, no toxic and harmful gas is generated in the production and use processes, and the product is more environment-friendly.)

1. The binder for 3D ink-jet printing is characterized by comprising the following components in parts by mass: 22.5 to 32.5 percent of binder system, 0.3 to 0.7 percent of surfactant and 67 to 77 percent of distilled water.

2. The binder for 3D inkjet printing according to claim 1, wherein the pH of the binder for 3D inkjet printing is 7.5 to 8.5.

3. The binder for 3D inkjet printing according to claim 1, wherein the binder system is composed of water-soluble starch, water-soluble dextrin and polyvinyl alcohol, and the composition ratio of the water-soluble starch, the water-soluble dextrin and the polyvinyl alcohol is arbitrarily adjustable.

4. The binder for 3D inkjet printing according to claim 1, wherein the surfactant is at least one of dioctyl sodium sulfosuccinate, glycol ether, and potassium lauryl ether phosphate.

5. A method for preparing a binder for 3D inkjet printing according to any one of claims 1 to 4, characterized by comprising the steps of:

pumping distilled water into a reaction kettle, starting stirring and heating to 95-105 ℃;

pumping the binder system into a reaction kettle, and stirring at the temperature of 95-105 ℃;

and thirdly, cooling to below 35 ℃, adding a surfactant, and stirring.

6. The method for preparing the binder for 3D inkjet printing according to claim 5, wherein the time for heat preservation and stirring in the step (II) is 60-90 min.

7. The method for preparing the binder for 3D inkjet printing according to claim 5, wherein the stirring time in the step (c) is 30-60 min.

Technical Field

The invention relates to the technical field of 3D printing, in particular to a binder for 3D ink-jet printing.

Background

The 3D printing technology together with the robot and the internet is known as a main sign of the third industrial revolution. At present, 3D printing technology has been widely applied to various industries such as casting, medical treatment, and handicraft production, and has been rapidly developed in recent years as an indispensable binder material for 3D inkjet printing technology, and functions and types thereof are increasing.

The invention overcomes the defects of the prior art by relying on the development of a 3D printing technology in the field of artware manufacturing and combining requirements, develops the binder for 3D ink-jet printing through technical innovation, has excellent binding performance on powder materials of any material and has wide application range. The binder material has no generation of toxic and harmful gases and no discharge of solid wastes in the production and use processes, and is green and environment-friendly.

Disclosure of Invention

The invention overcomes the defects in the prior art and successfully develops the binder for 3D ink-jet printing. The aqueous low-carbon binder has the technical advantages of low viscosity, low surface tension, high binding strength, no generation of toxic and harmful gases in the production and use processes, environmental protection and the like.

In order to solve the defects, the invention adopts the technical scheme that:

a binder for 3D ink-jet printing comprises the following components in parts by mass: 22.5 to 32.5 percent of binder system, 0.3 to 0.7 percent of surfactant and 67 to 77 percent of distilled water.

Further, the binder for 3D ink-jet printing is a weakly alkaline colorless to light yellow transparent uniform liquid, and the pH value is 7.5-8.5.

Furthermore, the binder system is composed of water-soluble starch, water-soluble dextrin and polyvinyl alcohol, and the composition proportion of the water-soluble starch, the water-soluble dextrin and the polyvinyl alcohol can be adjusted at will.

Further, the surfactant is at least one of dioctyl sodium sulfosuccinate, glycol ether and potassium lauryl ether phosphate.

A method for preparing the binder for 3D inkjet printing as described above, comprising the steps of:

pumping distilled water into a reaction kettle, starting stirring and heating to 95-105 ℃;

pumping the binder system into a reaction kettle, and stirring at the temperature of 95-105 ℃;

and thirdly, cooling to below 35 ℃, adding a surfactant, and stirring.

Further, the time for heat preservation and stirring in the second step is 60-90 min.

Further, the stirring time in the third step is 30-60 min.

The binder for 3D ink-jet printing effectively overcomes the problems in the prior art, and is prepared from a binder system, a surfactant and distilled water. Because the solvent of the invention is distilled water and the molecular carbon content of the binder system is low, the product of the invention has the characteristic of aqueous low carbon. The binder for 3D inkjet printing has the following characteristics: the viscosity at 25 ℃ is 8.0-13.0 mpa.s, the viscosity is low, and the fluidity is excellent; the surface tension at 20 ℃ is 28-32 mN/m, the surface tension is low, the fluidity is good, and the permeability and the wettability to powder materials are good; the bending strength is more than or equal to 10MPa, the bonding strength is high, the product has low production cost, no toxic and harmful gas is generated in the production and use processes, and the product is more environment-friendly.

Detailed Description

In order that the invention may be more fully understood, reference will now be made to the accompanying illustrative embodiments. The preferred embodiments of the present invention are given in the examples of the specification. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to solve the defects, the invention adopts the technical scheme that:

a binder for 3D ink-jet printing comprises the following components in parts by mass: 22.5 to 32.5 percent of binder system, 0.3 to 0.7 percent of surfactant and 67 to 77 percent of distilled water. The binder for 3D ink-jet printing is a weakly alkaline colorless to light yellow transparent uniform liquid, and the pH value is 7.5-8.5; the binder system consists of water-soluble starch, water-soluble dextrin and polyvinyl alcohol, and the composition proportion of the water-soluble starch, the water-soluble dextrin and the polyvinyl alcohol is randomly adjustable; the surfactant is one or the combination of two or more of dioctyl sodium sulfosuccinate, glycol ether and potassium lauryl ether phosphate.

A method for preparing the binder for 3D inkjet printing as described above, comprising the steps of:

pumping distilled water into an enamel reaction kettle by using a vacuum pump, starting stirring, opening steam for heating, and heating to 95-105 ℃ for heat preservation;

pumping the water-soluble starch, the water-based dextrin and the polyvinyl alcohol into an enamel reaction kettle by using a vacuum pump, and stirring for 60-90 min at the temperature of 95-105 ℃;

thirdly, cooling to below 35 ℃, adding the surfactant, and stirring for 30-60 min;

and fourthly, detecting and packaging to obtain the 3D ink-jet printing binder.