CN110358356B

CN110358356B - Colored crystal ink for 3D acrylic panel and preparation method and use method thereof

Info

Publication number: CN110358356B
Application number: CN201910689352.5A
Authority: CN
Inventors: 石树庭; 刘鸣强; 罗小丰
Original assignee: Foshan City Greend Chemical Co ltd
Current assignee: Foshan City Greend Chemical Co ltd
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2022-02-15
Anticipated expiration: 2039-07-29
Also published as: CN110358356A

Abstract

The invention discloses a colored crystal ink for a 3D acrylic panel, and a preparation method and a use method thereof, wherein the colored crystal ink is a double-component ink and consists of a component A and a component B, and the mass ratio of the component A to the component B is (8-15): 1; the component A comprises the following components in parts by mass: 80-90 parts of semi-finished gloss oil, 5-15 parts of pigment, 0.5-1.5 parts of dispersant and 0.5-1.2 parts of defoaming agent; the component B is an isocyanate curing agent; the semi-finished gloss oil comprises the following components in parts by weight: 50-70 parts of slow drying solvent, 25-35 parts of acrylic resin and 5-15 parts of ternary vinyl chloride-vinyl acetate copolymer. The color crystal printing ink is suitable for surface decoration of a 3D acrylic panel, and has the advantages of good appearance effect, high hardness, high adhesive force, good tensile property and high yield after surface decoration; in addition, the preparation process is simple, easy to operate and suitable for large-scale production.

Description

Colored crystal ink for 3D acrylic panel and preparation method and use method thereof

Technical Field

The invention relates to the technical field of printing ink, in particular to colored crystal ink for a 3D acrylic panel, and a preparation method and a use method thereof.

Background

With the explosion development of the real estate market in recent years, the industries of household appliances such as electric water heaters, air conditioners, refrigerators, washing machines and the like, which belong to the subordinate industries of the real estate, are rapidly developed, a plurality of domestic well-known brands are promoted, a plurality of international alliances of large brands are also introduced, the quality of the household appliance industry is promoted to be continuously improved, and meanwhile, the competition among the brands is intensified. In the time of competitive strength, all big producers pay great attention to in the aspect of quality, service, and new products are frequent, for example, the appearance of the arc air conditioner further promotes the competitiveness for the producer at present, and simultaneously, the arc air conditioner puts forward new aesthetic requirements for the panel on which the arc air conditioner is buckled.

The acrylic sheet is one of the commonly used plastic sheets in the market at present, and can be made into products with unique decorative effects through various processing technologies. The 3D acrylic panel that acrylic sheet material obtained after processing through the hot bending can be softer, the shape is abundanter various, and no seam, the physique is slick and sly, elegant appearance after the hot bending processing, and other metalworks have good linking, as an indispensable material, its decoration application receives the attention of high-end household electrical appliances market more and more.

At present, a processing method of a 3D acrylic panel includes the following steps: printing color crystal ink on the surface of an acrylic plate to be processed; and carrying out hot bending molding on the acrylic plate to be processed. The whole hot bending forming process is to place the acrylic plate to be processed with the carved appearance and the carved hole in a graphite mold, then place the mold in a hot bending machine, and form the acrylic plate to be processed into the 3D acrylic panel in the mold through heating, pressing and cooling.

However, in the process of implementing the embodiments of the present application, the inventors of the present application found that the above-mentioned technology has at least the following technical problems: (1) the existing color crystal ink has low hardness after being heated, is easy to stick a die, and has low yield of hot-bent finished products and poor production efficiency; (2) the existing color crystal ink has insufficient tensile property, and the ink can crack after hot bending forming, so that the product appearance is influenced.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention provides the colored crystal ink for the 3D acrylic panel and a preparation method and a use method thereof.

The technical problem to be solved by the invention is realized by the following technical scheme:

the color crystal ink for the 3D acrylic panel is a double-component ink and consists of a component A and a component B, wherein the mass ratio of the component A to the component B is (8-15): 1;

the component A comprises the following components in parts by mass: 80-90 parts of semi-finished gloss oil, 5-15 parts of pigment, 0.5-1.5 parts of dispersant and 0.5-1.2 parts of defoaming agent; the component B is an isocyanate curing agent;

the semi-finished gloss oil comprises the following components in parts by weight: 50-70 parts of slow drying solvent, 25-35 parts of acrylic resin and 5-15 parts of ternary vinyl chloride-vinyl acetate copolymer.

Further, the mass ratio of the component A to the component B is 10: 1; the component A comprises the following components in parts by mass: 88.2 parts of semi-finished gloss oil, 10 parts of pigment, 1 part of dispersant and 0.8 part of defoaming agent; the component B is an isocyanate curing agent;

the semi-finished gloss oil comprises the following components in parts by weight: 60 parts of slow-drying solvent, 30 parts of acrylic resin and 10 parts of ternary vinyl chloride-vinyl acetate copolymer.

Further, the slow-drying solvent is isophorone and DBE, and the mass ratio of isophorone to DBE is 1: 1.

Further, the pigment comprises at least one of pearl powder, light variable powder and laser powder.

Further, the preparation method of the semi-finished gloss oil comprises the following steps: and mixing the slow-drying solvent, the acrylic resin and the ternary vinyl chloride-vinyl acetate copolymer according to the formula, and then carrying out high-speed dispersion for 100-130 minutes to obtain the semi-finished gloss oil.

Further, the isocyanate curing agent is an HDI curing agent.

The invention also provides a preparation method of the colored crystal ink for the 3D acrylic panel, which comprises the following steps:

mixing a slow-drying solvent, acrylic resin and ternary vinyl chloride-vinyl acetate copolymer according to a formula, and then carrying out high-speed dispersion for 100-130 minutes to obtain a semi-finished product gloss oil for later use;

mixing the semi-finished gloss oil, the pigment, the dispersing agent and the defoaming agent according to a formula, uniformly dispersing, and then grinding to the fineness of less than 10 microns to obtain a component A;

the A component and the B component are mixed before ink printing is carried out.

The invention also provides a using method of the colored crystal ink for the 3D acrylic panel, which comprises the following steps of (8-15) mixing the component A and the component B in a mass ratio: 1, uniformly mixing, using screen printing on a clean acrylic plate, baking, curing and forming, and then carrying out hot bending treatment on the acrylic plate after forming.

Further, the baking temperature is 75-85 ℃, and the baking time is 25-40 minutes.

The invention has the following beneficial effects:

in the color crystal ink, the acrylic resin and the ternary vinyl chloride-vinyl acetate copolymer have good synergistic effect, so that the tensile property of the color crystal ink can be improved, and the acrylic plate printed with the color crystal ink is prevented from cracking in a hot bending process.

According to the invention, the color crystal ink is a double-component ink, the hardness of the color crystal ink is increased through the crosslinking reaction between the component A and the component B, and the problems of low hardness of the color crystal ink after heating and low hot bending yield of acrylic plates are effectively solved.

The color crystal printing ink is suitable for surface decoration of a 3D acrylic panel, and has the advantages of good appearance effect, high hardness, high adhesive force, good tensile property and high yield after surface decoration; in addition, the preparation process is simple, easy to operate and suitable for large-scale production.

Detailed Description

In a first aspect, the invention provides a colored crystal ink for a 3D acrylic panel, wherein the colored crystal ink is a two-component ink and consists of a component A and a component B.

The mass ratio of the component A to the component B is (8-15): 1 may be, for example, 8:1, 9:1, 10:1, 11:1, 12:1, 13:1, 14:1, 15:1, or a range defined by these values.

Wherein, the acrylic is also called as specially treated organic glass, and is a replacement product of the organic glass. In addition, the acrylic plate can be perfectly combined with aluminum-plastic plate profiles, high-grade screen printing and the like. The acrylic plate can provide various appearance patterns, meets the requirement of appearance differentiation, and is more and more widely used.

"ACRYLIC" is a transliteration word, and English is ACRYLIC. It is a chemical material. The chemical name is PMMA which belongs to polyacrylate, commonly called organic glass after special treatment, and the acrylic raw materials in the application industry generally appear in the forms of particles, plates, pipes and the like.

The color crystal ink is suitable for surface decoration of a 3D acrylic panel, is printed on the acrylic panel and is subjected to hot bending forming, the yield and the yield are improved, the visual sense is high-end and elegant, a good visual effect is achieved, and the stereoscopic impression is strong; the manufactured panel and the household appliance body have good integrity and coordination consistency, are attractive and attract consumers.

Specifically, the 3D acrylic panel is formed by screen printing the color crystal ink on the acrylic panel and then processing the color crystal ink through a hot bending process.

The component A comprises the following components in parts by mass: 80-90 parts of semi-finished gloss oil, 5-15 parts of pigment, 0.5-1.5 parts of dispersant and 0.5-1.2 parts of defoaming agent.

The semi-finished gloss oil comprises the following components in parts by weight: 50-70 parts of slow-drying solvent, 25-35 parts of acrylic resin and 5-15 parts of ternary vinyl chloride-vinyl acetate copolymer;

more preferably, the mass ratio of the component A to the component B is 10: 1; the component A comprises the following components in parts by mass: 88.2 parts of semi-finished gloss oil, 10 parts of pigment, 1 part of dispersant and 0.8 part of defoaming agent; the component B is an isocyanate curing agent;

The preparation method of the semi-finished gloss oil comprises the following steps: and mixing the slow-drying solvent, the acrylic resin and the ternary vinyl chloride-vinyl acetate copolymer according to the formula, and then carrying out high-speed dispersion for 100-130 minutes to obtain the semi-finished gloss oil.

In the present invention, it is preferable to uniformly mix the components by stirring and dispersing them for 100-130 minutes by using a high-speed dispersing machine.

In the invention, the acrylic resin and the ternary vinyl chloride-vinyl acetate copolymer are directly dissolved in the slow-drying solvent, and the slow-drying solvent has a slow volatilization speed, so that the solvent is prevented from being volatilized too fast to block a screen printing plate for screen printing.

The slow-drying solvent comprises one or more of DBE, isophorone, diethylene glycol monobutyl ether, diacetone alcohol, DMSO, propylene glycol and dipropylene glycol methyl ether acetate. More preferably, the slow-drying solvent is isophorone and DBE, and the mass ratio of isophorone to DBE is 1: 1. By adopting the special slow-drying solvent, the acrylic resin and the ternary vinyl chloride-vinyl acetate copolymer can be better dissolved to obtain transparent viscous liquid.

According to the invention, the ternary vinyl chloride-vinyl acetate copolymer emulsion can endow the printing ink with excellent alcohol solvent resistance, has better water resistance, oil resistance, acid resistance, alkali resistance and salt resistance, has very excellent adhesive force to an acrylic plate, has good flexibility, can have good arrangement effect on part of pigments, and improves the dispersibility of the pigments in a system.

According to the invention, the thermoplastic acrylic resin has good flexibility, is beneficial to the dispersion of the pigment, and can improve the gloss of the colorful crystal ink.

In the prior art, thermosetting resins (such as epoxy resins and polyester resins) are generally used for the color crystal ink. Through a large number of experiments, the inventor creatively selects the thermoplastic acrylic resin and the ternary vinyl chloride-vinyl acetate copolymer resin as the combined resin in the color crystal ink, and the acrylic resin and the ternary vinyl chloride-vinyl acetate copolymer resin have good synergistic effect, so that the tensile property of the color crystal ink can be improved, and the acrylic plate printed with the color crystal ink is prevented from cracking in a hot bending process.

According to the invention, the color crystal ink is a double-component ink, the ternary vinyl chloride-vinyl acetate copolymer in the component A and the HDI in the component B are subjected to a crosslinking reaction, so that the hardness of the color crystal ink is increased, and the problems of low hardness of the color crystal ink after heating and low yield of thermal bending of acrylic plates are effectively solved.

The pigment comprises at least one of pearl powder, optically variable powder and laser powder, so that the visual effect of the product is enhanced, the three-dimensional patterns with different lines are formed on the 3D acrylic panel, and the three-dimensional patterns are concave-convex layered, so that the product has a dynamic and vivid decorative effect.

In the invention, the pigment also comprises a common pigment, wherein the common pigment is one or more of titanium dioxide, carbon black and iron oxide pigment; titanium pigment, carbon black and iron oxide pigment are widely used inorganic pigments, and have the advantages of low price and no pollution. Titanium dioxide is the most widely used white pigment, carbon black is the most widely used black pigment, iron oxide pigments comprise iron oxide yellow, iron oxide blue, iron oxide green, brown iron oxide and the like, the color is rich, and different pigments can be selected according to design requirements to be mixed and proportioned to prepare the pigments with various colors and bright colors.

The dispersant is a common assistant in the ink, the type of the dispersant is not particularly limited in the invention, and the dispersant can be selected conventionally by a person skilled in the art, and by way of example, the dispersant can be selected from one or more of unsaturated polybasic acid polymer, acrylic block copolymer and amide and imide based on long-chain polyester; products with the Digao brands TEGO700, TEGO710 and TEGO760 can be selected, products with the Loborun brands SOLSPERSE24000, SOLSPERSE32500, SOLSPERSE37500 and SOLSPERSE76500 and products with the Huaxia auxiliary brands HX 4010, HX 4013, HX 4015 HX 4022 and HX 4800.

The defoaming agent is a common auxiliary agent in the ink, the type of the defoaming agent is not particularly limited in the invention, and the defoaming agent can be selected conventionally by a person skilled in the art, and by way of example, the defoaming agent is one or more of polysiloxane, polydimethylsiloxane, tributyl phosphate and polyether modified silicon.

The component B is an isocyanate curing agent, and more preferably, the component B is an HDI curing agent.

The 3D acrylic panel product prepared by the color crystal ink has good aesthetic property, practicability and machinability, and can be widely used as shells of various household electrical appliances.

In a second aspect, the invention further provides a preparation method of the colored crystal ink for the 3D acrylic panel, which includes the following steps:

In the invention, a three-roller machine can be used for grinding, and the grinding fineness is required to be less than or equal to 10 mu m.

High speed dispersion is a routine operation in ink preparation, and its structure and principle are known to the skilled person in the technical handbook or by routine experimentation.

In a third aspect, the invention further provides a using method of the colored crystal ink for the 3D acrylic panel, wherein the component a and the component B are mixed according to a mass ratio of (8-15): 1, uniformly mixing, using screen printing on a clean acrylic plate, baking, curing and forming, and then carrying out hot bending treatment on the acrylic plate after forming.

Wherein the baking temperature is 75-85 ℃, and the baking time is 25-40 minutes.

In the silk screen printing, the silk screen is 300-350 meshes.

The present invention will be described in detail with reference to examples, which are only preferred embodiments of the present invention and are not intended to limit the present invention.

Example 1

The color crystal ink for the 3D acrylic panel is a two-component ink and consists of a component A and a component B, wherein the component B is an HDI curing agent; the preparation method comprises the following steps:

mixing 60 parts of slow-drying solvent, 30 parts of acrylic resin and 10 parts of ternary vinyl chloride-vinyl acetate copolymer, and dispersing at a high speed for 120 minutes to obtain semi-finished gloss oil for later use; the slow-drying solvent comprises isophorone and DBE, and the mass ratio of isophorone to DBE is 1: 1;

mixing 88.2 parts of semi-finished gloss oil, 10 parts of pigment, 1 part of dispersing agent and 0.8 part of defoaming agent, uniformly dispersing on a dispersion machine, and then grinding on a three-roller machine until the fineness is below 10 mu m to obtain a component A;

before ink printing, the mass ratio of the component A to the component B is 10:1, mixing uniformly.

Example 2

The color crystal ink is a double-component ink and consists of a component A and a component B, wherein the component B is an HDI curing agent; the preparation method comprises the following steps:

mixing 50 parts of slow-drying solvent, 25 parts of acrylic resin and 15 parts of ternary vinyl chloride-vinyl acetate copolymer, and dispersing at a high speed for 100 minutes to obtain semi-finished gloss oil for later use; the slow-drying solvent comprises isophorone and DBE, and the mass ratio of isophorone to DBE is 1: 1;

mixing 80 parts of semi-finished gloss oil, 5 parts of pigment, 1.5 parts of dispersing agent and 0.5 part of defoaming agent, uniformly dispersing on a dispersion machine, and then grinding on a three-roller machine until the fineness is below 10 mu m to obtain a component A;

before ink printing, the mass ratio of the component A to the component B is 8:1, mixing uniformly.

Example 3

mixing 70 parts of slow-drying solvent, 35 parts of acrylic resin and 5 parts of ternary vinyl chloride-vinyl acetate copolymer, and dispersing at a high speed for 130 minutes to obtain semi-finished gloss oil for later use; the slow-drying solvent comprises isophorone and DBE, and the mass ratio of isophorone to DBE is 1: 1;

mixing 90 parts of semi-finished gloss oil, 15 parts of pigment, 0.5 part of dispersing agent and 1.2 parts of defoaming agent, uniformly dispersing on a dispersion machine, and then grinding on a three-roller machine until the fineness is below 10 mu m to obtain a component A;

before ink printing, the mass ratio of the component A to the component B is 15:1, uniformly mixing; .

Example 4

The use method of the colored crystal ink for the 3D acrylic panel comprises the following steps of mixing the component A and the component B in the examples 1-3 in a mass ratio of (8-15): 1, screen printing on a clean acrylic plate, baking for 25-40 minutes at 75-85 ℃, curing and forming, forming an ink layer on the acrylic plate, and then carrying out hot bending treatment on the acrylic plate.

Comparative example 1

Based on example 1, the difference is that in comparative example 1, 60 parts of slow-drying solvent and 40 parts of acrylic resin are mixed and then dispersed at high speed for 120 minutes to obtain semi-finished gloss oil; the slow-drying solvent comprises isophorone and DBE, and the mass ratio of the isophorone to the DBE is 1: 1.

Comparative example 2

Based on example 1, the difference is that in comparative example 2, 60 parts of slow-drying solvent and 40 parts of ternary vinyl chloride-vinyl acetate copolymer are mixed and then dispersed at high speed for 120 minutes to obtain semi-finished gloss oil; the slow-drying solvent comprises isophorone and DBE, and the mass ratio of the isophorone to the DBE is 1: 1.

Comparative example 3

Based on example 1, the difference is that in comparative example 3, 60 parts of slow-drying solvent, 30 parts of epoxy resin and 10 parts of ternary vinyl chloride-vinyl acetate copolymer are mixed and then dispersed at high speed for 120 minutes to obtain semi-finished gloss oil; the slow-drying solvent comprises isophorone and DBE, and the mass ratio of the isophorone to the DBE is 1: 1.

Comparative example 4

Based on example 1, except that in comparative example 1, component B was not included.

Test examples

The products obtained in examples 1 to 3 and comparative examples 1 to 4 were subjected to a performance test according to the national standard: the pencil hardness test standard refers to GB/T6739-2006, and the adhesive force test standard refers to GB/T6739-2006; the boiling test standard refers to GB/T1733 (method B); and (3) testing tensile property: and (3) scraping the printing ink by using a film scraper (the thickness of the film is 15-60 mu m), drying and curing, and testing the tensile length of the printing ink.

Through the test: the pencil hardness in examples 1 to 3 was 4H, respectively, and the pencil hardness in comparative examples 1 to 4 was 2H, 3H, respectively.

The adhesion in examples 1-3 all reached 5B, while the adhesion in comparative examples 1-4 was 3B.

The hardness after boiling was 3H in examples 1-3, while it was only 1H in comparative examples 1-4.

The colored crystal ink prepared by the method of examples 1-3 has good tensile property, the tensile rate can reach up to 228%, and the tensile rates of comparative examples 1-4 are respectively 105%, 96%, 100% and 116%.

According to test results, the color crystal ink prepared by the method has the advantages of good adhesive force, high hardness and good tensile property.

The above-mentioned embodiments only express the embodiments of the present invention, and the description is more specific and detailed, but not understood as the limitation of the patent scope of the present invention, but all the technical solutions obtained by using the equivalent substitution or the equivalent transformation should fall within the protection scope of the present invention.

Claims

1. The color crystal ink for the 3D acrylic panel is characterized by being a double-component ink and consisting of a component A and a component B, wherein the mass ratio of the component A to the component B is (8-15): 1;

the use method of the colored crystal ink for the 3D acrylic panel comprises the following steps of (8-15) mixing the component A and the component B in a mass ratio: 1, uniformly mixing, using screen printing on a clean acrylic plate, baking, curing and forming, and then carrying out hot bending treatment on the acrylic plate after forming;

the slow-drying solvent is isophorone and DBE, and the mass ratio of isophorone to DBE is 1: 1;

the isocyanate curing agent is an HDI curing agent.

2. The colored crystal ink for a 3D acrylic panel according to claim 1, wherein the mass ratio of the component A to the component B is 10: 1; the component A comprises the following components in parts by mass: 88.2 parts of semi-finished gloss oil, 10 parts of pigment, 1 part of dispersant and 0.8 part of defoaming agent; the component B is an isocyanate curing agent;

3. The color-crystal ink for a 3D acrylic panel as claimed in claim 1, wherein the pigment comprises at least one of pearl powder, light variable powder and laser powder.

4. The colored crystal ink for the 3D acrylic panel as claimed in claim 1, wherein the semi-finished gloss oil is prepared by the following steps: and mixing the slow-drying solvent, the acrylic resin and the ternary vinyl chloride-vinyl acetate copolymer according to the formula, and then carrying out high-speed dispersion for 100-130 minutes to obtain the semi-finished gloss oil.

5. The colored crystal ink for a 3D acrylic panel according to claim 1, wherein the baking temperature is 75-85 ℃ and the baking time is 25-40 minutes.

6. The method for preparing the colored crystal ink for the 3D acrylic panel as claimed in any one of claims 1 to 5, comprising the steps of: