CN112248677A

CN112248677A - Additive for wood grain transfer printing aluminum plate, transfer printing method and product thereof

Info

Publication number: CN112248677A
Application number: CN202011166065.5A
Authority: CN
Inventors: 陈晨; 朱旭雯; 朱美玉; 陈剑峰
Original assignee: Shanghai Xindayu Fluorine Carbon Spraying Material Co ltd
Current assignee: Shanghai Xindayu Fluorine Carbon Spraying Material Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-01-22
Anticipated expiration: 2040-10-27
Also published as: CN112248677B

Abstract

The invention relates to the technical field of wood grain transfer printing, and particularly provides an additive for a wood grain transfer printing aluminum plate, a transfer printing method of the additive and a product. The invention provides an additive for a wood grain transfer aluminum plate, which comprises a base powder additive and a sizing material additive, wherein the base powder additive comprises polyester resin and cellulose, and the mass ratio of the polyester resin to the cellulose is 100: (1.2-3); the sizing material additive comprises 16-19 parts by weight of butylated polyformaldehyde urea, 5-10 parts by weight of tackifier and 8-15 parts by weight of stabilizer.

Description

Additive for wood grain transfer printing aluminum plate, transfer printing method and product thereof

Technical Field

The invention relates to the technical field of wood grain transfer printing, and particularly provides an additive for a wood grain transfer printing aluminum plate, a transfer printing method of the additive and a product.

Background

Due to the rapid development of global economy, the unregulated exploitation and felling of earth resources cause large area of original forest resources to disappear, global climate to become warm, natural disasters such as land desertification, earthquakes, tsunamis, drought and the like are caused, and the living conditions and space of human beings are seriously threatened. After the pain is relieved, people have qualitative improvement on environmental awareness, and can meet the good pursuit of people on the quality of life while ensuring the existing resources. In this case, the wood grain is generally transferred to the surface of the workpiece by thermal transfer by electrostatically spraying powder on the metal product. The color is not easy to fade, the wood grain is vivid, and the product grade is higher. The high-temperature-resistant metal material is widely applicable to high-temperature-resistant metal materials such as aluminum alloy doors and windows, anti-theft doors, fireproof doors, steel-wood furniture, file cabinets, computer shells, household appliances and metal ornaments, and can meet the unique love of different consumption levels on wood materials.

With the continuous improvement of aesthetic requirements, people have higher and higher requirements on the appearance leveling property of transfer printing products, and not only pay attention to the fact that transfer printing tear paper is not adhered to paper and has no residual oil marks, but also have more significance on the wood grain definition, the depth degree, the warping of the transfer printing process wood grain paper and the surface glossiness of the transfer printing patterns. In addition, under different application environments, new requirements on the hardness and the salt spray resistance of the surface of the wood grain transfer aluminum plate are also provided.

Disclosure of Invention

In order to solve the technical problem, the first aspect of the invention provides a wood grain transfer aluminum plate, which comprises a base powder additive and a sizing material additive, wherein the base powder additive comprises polyester resin and cellulose, and the mass ratio of the polyester resin to the cellulose is 100: (1.2-3); the sizing material additive comprises 16-19 parts by weight of butylated polyformaldehyde urea, 5-10 parts by weight of tackifier and 8-15 parts by weight of stabilizer.

As a preferable technical scheme of the invention, the acid value of the polyester resin is 18-60 mgKOH/g, and the melt viscosity at 200 ℃ is 4000-5500 mPa.s.

The second aspect of the invention provides a wood grain transfer aluminum plate prepared by the additive for the wood grain transfer aluminum plate.

As a preferred technical scheme of the invention, the aluminum plate, the coating, the adhesive layer and the wood grain layer are arranged from top to bottom.

As a preferable technical scheme of the invention, the thickness of the coating is 70-80 μm. .

The third aspect of the invention provides a preparation method of the wood grain transfer printing aluminum plate, which at least comprises the following steps:

(1) cleaning an aluminum plate, and drying after pretreatment;

(2) spraying base powder containing transfer printing powder and base powder additive on the surface of the pretreated aluminum plate in a high-voltage electrostatic manner, and then drying to obtain a cured coating;

(3) mixing the sizing material additive, the sizing material and water to obtain a mixed sizing material, coating the mixed sizing material on the coating to obtain an adhesive layer, pasting the wood grain paper, airing for 0.5-1 h at room temperature, drying, and tearing off the wood grain paper to obtain the wood grain paper.

As a preferable technical scheme of the invention, the drying in the step (2) is that the aluminum plate is placed on production equipment with the conveying speed of 2-3 m/min, conveyed for 7-8 min in a drying tunnel with the temperature of 30 ℃ rising to 200 ℃, conveyed for 9-10 min in the drying tunnel with the temperature of 200 ℃, and conveyed for 7-8 min in a drying tunnel with the temperature of 200 ℃ falling by 70 ℃.

As a preferred technical scheme of the invention, the viscosity of the mixed sizing material in the step (3) is up to 18s flowing under a No. 4 measuring cup.

As a preferable technical scheme of the invention, the drying in the step (3) is that the aluminum plate is placed on production equipment with the conveying speed of 4-4.5 m/min, conveyed for 3-4 min in a drying tunnel with the temperature of 40 ℃ rising to 180 ℃, conveyed for 5-8 min in the drying tunnel with the temperature of 180 ℃, and conveyed for 3-4 min in a drying tunnel with the temperature of 180 ℃ falling by 40 ℃.

As a preferable technical scheme of the invention, the gluing amount of the mixed glue stock in the step (3) is 1 kg/15-20 m²。

Has the advantages that: the invention provides an additive for a wood grain transfer printing aluminum plate, a transfer printing method and a product thereof, wherein the additive is prepared by selecting a specific base powder additive and a sizing material additive, controlling the content of the specific base powder additive and the sizing material additive, and further adjusting the viscosity of the sizing material and the baking temperature and time, so that the wood grain paper is easy to tear and has no residual oil marks, the transfer printing effect is improved, the problems of different depths, unclear wood grains, wrinkles, flow marks, bubbling or warping of the wood grain paper in the transfer printing process are avoided, the glossiness of the surface of a transfer printing pattern is improved, and the hardness and the salt spray resistance of the surface of the wood grain transfer printing aluminum plate are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a transfer-printed aluminum wood grain plate prepared in example 3 of the present invention;

FIG. 2 is a transfer-printed aluminum wood grain plate prepared in example 14 of the present invention;

FIG. 3 is a transfer-printed aluminum wood grain plate prepared in example 15 of the present invention;

FIG. 4 is a transfer-printed aluminum wood grain plate prepared in example 18 of the present invention;

FIG. 5 shows a transfer-printed wood grain aluminum sheet prepared in example 19 of the present invention.

Detailed Description

The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. 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. In case of conflict, the present specification, including definitions, will control.

The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.

In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the number clearly indicates the singular.

In order to solve the technical problems, the first aspect of the invention provides an additive for a wood grain transfer aluminum plate, which comprises a base powder additive and a sizing material additive, wherein the base powder additive comprises polyester resin and cellulose, and the mass ratio of the polyester resin to the cellulose is 100: (1.2-3); the sizing material additive comprises 16-19 parts by weight of butylated polyformaldehyde urea, 5-10 parts by weight of tackifier and 8-15 parts by weight of stabilizer.

In a preferred embodiment, the base powder additive comprises polyester resin and cellulose, and the mass ratio of the polyester resin to the cellulose is 100: 2.1; the sizing additive comprises 18 parts of butylated polyformaldehyde urea, 8 parts of tackifier and 12 parts of stabilizer in parts by weight.

Base powder additive

Polyester resin

In one embodiment, the polyester resin has an acid value of 18 to 60mgKOH/g, and a melt viscosity of 4000 to 5500mPa.s at 200 ℃; preferably, the polyester resin has an acid value of 20 to 55mgKOH/g and a melt viscosity of 4200 to 5400mPa.s at 200 ℃.

In a more preferred embodiment, the polyester resin comprises a polyester resin A having an acid value of 18 to 30mgKOH/g and a melt viscosity of 4200 to 5400mPa.s at 200 ℃ and a polyester resin B having an acid value of 40 to 55mgKOH/g and a melt viscosity of 4200 to 5400mPa.s at 200 ℃.

In a more preferred embodiment, the mass ratio of the polyester resin a to the polyester resin B is 1: (1-1.3); more preferably, the mass ratio of the polyester resin A to the polyester resin B is 1: 1.2.

in a more preferred embodiment, the polyester resin A is purchased from NH-9508, Ongkyo materials science and technology, Inc; the polyester resin B was purchased from NH-9001 of Onghamus Onggi materials science and technology, Inc.

The method for testing the acid value and the melt viscosity is not particularly limited, and the method can be obtained by the methods of GB/T6743-2008 and GB/T9751.1-2008.

The applicant finds that the polyester resin A with the acid value of 18-30 mgKOH/g and the melt viscosity of 4200-5400 mPa.s at 200 ℃ and the polyester resin B with the acid value of 40-55 mgKOH/g are added into the system at the same time, the melt viscosity of 4200-5400 mPa.s at 200 ℃ is beneficial to improving the transfer effect, and the problems of different depths, unclear wood grains or warping of the wood grain paper in the transfer process are solved, especially the mass ratio of the polyester resin A to the polyester resin B is controlled to be 1: (1-1.3), when the polyester resin B is added too much, the reaction activity is too high at the moment although the polyester resin B is beneficial to tearing off the wood grain paper, and the crosslinking density is reduced due to fast curing, so that the final transfer effect is influenced; when the polyester resin B is added too little or not added, the problem that the wood grain paper is not easy to tear and transfer printing oil marks are remained can be caused due to the reduction of the whole reaction activity. In addition, when the difference between the acid values of the polyester resin A and the polyester resin B is too large, the difference between the gelling times of different parts of the system is large, the wood-grain paper is difficult to tear, and the wood-grain paper is easy to warp.

Cellulose, process for producing the same, and process for producing the same

In one embodiment, the cellulose is selected from one or more of carboxymethyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose and methyl cellulose.

In a preferred embodiment, the cellulose is hydroxypropyl methylcellulose.

In a more preferred embodiment, the hydroxypropyl methylcellulose has a methoxyl content of 27 to 32%; more preferably, the content of methoxyl in the hydroxypropyl methyl cellulose is 28-31%.

In a more preferred embodiment, the hydroxypropyl methylcellulose is purchased from HG-E of Hebei Xingtai cellulose, Inc.

In the experimental process, the applicant finds that when hydroxypropyl methyl cellulose with the methoxyl content of 27-32% is added into base powder, the mass ratio of polyester resin to cellulose is controlled to be 100: (1.2-3), the problems of different depths, unclear wood grains or warping of the wood grain paper in the transfer printing process can be solved, the glossiness of the surface of the transfer printing pattern is improved, and the salt spray resistance is improved. The reason is probably that under the high-voltage electrostatic spraying, the addition of the hydroxypropyl methyl cellulose and other components, particularly polyester resin, on one hand, the base powder can be tightly attached to the surface of the aluminum plate, and on the other hand, the base powder has stronger adsorbability with wood grain paper at high temperature, so that the adhesive force of the coating is improved, and the coating can resist the long-time erosion of salt mist; in addition, the hydroxypropyl methyl cellulose with specific content can act with the printing ink on the wood grain paper, so that the pattern transfer printing is clearer, the surface is soft, smooth and bright, the texture level is rich and fine, and the gloss is uniform.

Sizing additive

Tackifier

In one embodiment, the tackifier is selected from one or more of hydroxymethyl ethylene urea resin, oxidized paraffin, carboxymethyl cellulose and rosin resin.

In a preferred embodiment, the viscosity increasing agent is carboxymethyl cellulose.

In a more preferred embodiment, the viscosity of the 12% aqueous solution of carboxymethyl cellulose at 25 ℃ is 700 to 1300mPa.s, and the degree of substitution is 0.7 to 1; more preferably, the viscosity of the 12% aqueous solution of carboxymethyl cellulose at 25 ℃ is 800 to 1200mPa.s, and the degree of substitution is 0.8.

In a more preferred embodiment, the carboxymethyl cellulose is purchased from IM8, yohimu, xingle chemical company, inc.

The applicant finds that the addition of the carboxymethyl cellulose with 12% of water solution, the viscosity of which is 700-1300 mPa.s at 25 ℃ and the substitution degree of which is 0.7-1 is beneficial to improving the overall uniformity and stability of the mixed sizing material probably because the molecular chain length is moderate, and on the other hand, the carboxymethyl cellulose can better interact with a coating, so that the pattern transfer printing is clearer, and the salt spray resistance is improved.

Stabilizer

In one embodiment, the stabilizer is selected from one or more of phosphite ester, aromatic heterocyclic nitrogen compound and silane coupling agent.

Examples of phosphites include, but are not limited to, triethyl phosphite, tripropyl phosphite, tributyl phosphite.

Examples of the heteroaromatic nitrogen compound include, but are not limited to, pyridine, 2-methylpyridine, and 2-vinylpyridine.

Examples of silane coupling agents include, but are not limited to, vinyltriethoxysilane, vinyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane.

In a preferred embodiment, the stabilizer is gamma-glycidoxypropyltrimethoxysilane.

In a more preferred embodiment, the gamma-glycidoxypropyltrimethoxysilane is purchased from Dow Corning Z-6040, Kjen chemical Co., Ltd.

In the system, the ethyl gamma-glycidyl ether propyl trimethoxy silane is selected as the stabilizer, so that the system has good crosslinking effect, higher bonding strength and can further improve the hardness and the salt spray resistance of the surface of the wood grain transfer printing aluminum plate.

In one embodiment, the sizing additive is prepared by: adding the butylated polyformaldehyde urea, the tackifier and the stabilizer into a high-speed mixer according to the parts by weight, and stirring for 10-20 min to obtain the adhesive.

In the experimental process, the applicant finds that the addition of the sizing additive can effectively avoid the problems that sizing materials volatilize too fast at a higher temperature (such as summer) and a film is formed on the surface of the sizing materials, so that the wood grain textures of the transfer paper cannot be transferred onto an aluminum plate, and in addition, the wood grain paper is easy to warp and wrinkles, flow marks and bubbles are easy to occur, so that the wood grains are unclear, the color is inconsistent and the like; the volatilization is too slow under the condition of low temperature (such as 10-15 ℃ in winter), which affects the productivity and delays the supply period.

In one embodiment, the wood grain transfer aluminum plate comprises an aluminum plate, a coating, an adhesive layer and a wood grain layer from top to bottom.

In one embodiment, the coating thickness is 70 to 80 μm; preferably, the coating thickness is 75 μm.

The third aspect of the invention provides a preparation method of the wood grain transfer printing aluminum plate, which comprises the following steps:

(1) cleaning an aluminum plate, and drying after pretreatment;

Step (1)

The pretreatment in step (1) of the present invention refers to oil removal, water washing, and removal of oil stains and dust on the surface of the aluminum plate, and the specific embodiment of the pretreatment is not particularly limited, and is a technical means commonly used by those skilled in the art.

Step (2)

The drying in the step (2) is that the aluminum plate is placed on production equipment with the conveying speed of 2-3 m/min, conveyed for 7-8 min in a drying tunnel with the temperature rising to 200 ℃ at 30 ℃, conveyed for 9-10 min in the drying tunnel with the temperature rising to 200 ℃, and conveyed for 7-8 min in a drying tunnel with the temperature falling to 70 ℃ at 200 ℃; preferably, the drying in the step (2) is that the aluminum plate is placed on a production device with a conveying speed of 2.3m/min, conveyed for 7min in a drying tunnel with the temperature of 30 ℃ rising to 200 ℃, conveyed for 10min in a drying tunnel with the temperature of 200 ℃, and conveyed for 7min in a drying tunnel with the temperature of 200 ℃ falling by 70 ℃.

In one embodiment, the base powder additive accounts for 65-75% of the total weight of the base powder; preferably, the base powder additive accounts for 70% of the total weight of the base powder.

The transfer powder and the wood grain paper can be purchased from markets, including but not limited to, the Shanxi color plastic hardware company.

The high-voltage electrostatic spraying utilizes the principle of high-voltage electrostatic corona electric field. The metal diversion cup on the spray gun head is connected with high-voltage negative electricity, and a coated workpiece is grounded to form a positive electrode. A strong electrostatic field is formed between the spray gun and the workpiece. When the powder coating is delivered to the diversion cup of the spray gun from the powder supply barrel through the powder delivery pipe by the carrier gas (compressed air), the periphery of the powder coating generates dense charges, the powder is charged with negative charges, the powder is uniformly adsorbed on a workpiece under the action of electrostatic force and compressed air, and the powder is heated, melted and solidified (or plasticized) to form a uniform, continuous, flat and smooth coating film.

Step (3)

The mass ratio of the sizing material additive to the sizing material in the mixed sizing material is (0.5-0.9): 1; preferably, the mass ratio of the sizing additive to the sizing is 0.7: 1.

in one embodiment, the viscosity of the mixed size reaches 18 seconds of run-out under a No. 4 measuring cup.

The amount of water added is not particularly limited, and the mixed size can reach a viscosity of 18s flowing out under a No. 4 measuring cup.

If the viscosity of the mixed sizing material is too high, the dried wood-grain paper is not easy to tear, and when the viscosity of the mixed sizing material is controlled to reach the viscosity of finishing flowing 18s below a No. 4 measuring cup, the dried wood-grain paper is easy to tear and has no residual ink.

In one embodiment, the drying in step (3) is that the aluminum plate is placed on a production device with a conveying speed of 4-4.5 m/min, conveyed in a drying tunnel with the temperature of 40 ℃ rising to 180 ℃ for 3-4 min, conveyed in a drying tunnel with the temperature of 180 ℃ rising for 5-8 min, and conveyed in a drying tunnel with the temperature of 180 ℃ falling for 3-4 min; preferably, the drying in the step (3) is that the aluminum plate is placed on a production device with a conveying speed of 4.5m/min, conveyed for 3min in a drying tunnel with the temperature of 40 ℃ rising to 180 ℃, conveyed for 5min in the drying tunnel with the temperature of 180 ℃, and conveyed for 3min in a drying tunnel with the temperature of 180 ℃ falling by 40 ℃.

The drying time after the wood grain paper is attached is neither longer nor shorter, and if the drying time is longer, the wood grain color on the surface of the obtained plate is lighter; if the drying time is shorter, the wood grain color on the surface of the obtained plate is darker; the drying temperature is not too high or too low, and is determined according to the depth of the wood grain color, the light color is slow in chain speed, and the temperature is higher; the dark color chains are fast and the temperature is lower.

In one embodiment, the glue coating amount of the mixed glue stock is 1 kg/15-20 m²。

The sizing may be obtained from commercially available sources including, but not limited to, Zhongguan adhesive materials, Inc. available in Dongguan.

A third aspect of the invention provides a wood grain transfer aluminum sheet prepared according to the method.

Examples

In order to better understand the above technical solutions, the following detailed descriptions will be provided with reference to specific embodiments. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention. In addition, the starting materials used are all commercially available, unless otherwise specified.

Example 1

Embodiment 1 of the present invention provides a wood grain transfer aluminum sheet; the additive for the wood grain transfer aluminum plate comprises a base powder additive and a sizing material additive, wherein the base powder additive comprises polyester resin and cellulose, and the mass ratio of the polyester resin to the cellulose is 100: 2.1; the sizing additive comprises 18 parts of butylated polyformaldehyde urea (CAS: 68002-19-7), 8 parts of tackifier and 12 parts of stabilizer in parts by weight.

The polyester resin comprises a polyester resin A which is purchased from NH-9508 of the Optimus Almus Material science and technology Limited company of Guangzhou and a polyester resin B which is purchased from NH-9001 of the Optimus Almus Material science and technology Limited company of Guangzhou; the mass ratio of the polyester resin A to the polyester resin B is 1: 1.2.

the cellulose is hydroxypropyl methyl cellulose; the hydroxypropyl methylcellulose was purchased from HG-E, Hebei Xingtai cellulose, Inc.

The tackifier is carboxymethyl cellulose, available as IM8 from Xingle chemical Co., Ltd, Ningpo City.

The stabilizer is gamma-glycidyl ether propyl trimethoxy silane which is purchased from Dow Corning Z-6040 of Kay chemical company of Shanghai.

The preparation method of the sizing material additive comprises the following steps: adding the butylated polyformaldehyde urea, the tackifier and the stabilizer into a high-speed mixer according to the parts by weight, and stirring for 15min to obtain the adhesive.

The preparation method of the wood grain transfer printing aluminum plate comprises the following steps:

(1) cleaning an aluminum plate, and drying after pretreatment;

(2) spraying base powder containing transfer printing powder and base powder additive on the surface of the pretreated aluminum plate in a high-voltage electrostatic manner, and then drying to obtain a cured coating; the thickness of the coating is 75 μm; the base powder additive accounts for 70% of the total weight of the base powder; the drying is that the aluminum plate is placed on production equipment with the conveying speed of 2.3m/min, and is conveyed for 7min in a drying tunnel with the temperature rising to 200 ℃ at 30 ℃, is conveyed for 10min in a drying tunnel with the temperature rising to 200 ℃, and is conveyed for 7min in a drying tunnel with the temperature falling to 70 ℃ at 200 ℃.

(3) Mixing the sizing material additive, the sizing material and water to obtain a mixed sizing material, coating the mixed sizing material on a coating after the viscosity reaches 18s below a No. 4 measuring cup, pasting the wood grain paper, airing for 0.5h at room temperature, drying, and tearing off the wood grain paper to obtain the wood grain paper; the drying is that the aluminum plate is placed on production equipment with the conveying speed of 4.5m/min, and is conveyed for 3min in a drying tunnel with the temperature rising to 180 ℃ at 40 ℃, is conveyed for 5min in a drying tunnel with the temperature rising to 180 ℃, and is conveyed for 3min in a drying tunnel with the temperature falling to 40 ℃ at 180 ℃; the mass ratio of the sizing material additive to the sizing material is 0.7: 1; the glue coating amount of the mixed glue stock is 1kg/18m²。

The transfer printing powder and the wood grain paper are purchased from Shande district Shang color plastics hardware Limited company in Foshan city.

The compound was purchased from Zhongtian adhesive materials, Inc. of Dongguan.

Example 2

Embodiment 2 of the present invention provides a wood grain transfer aluminum sheet; the additive for the wood grain transfer aluminum plate comprises a base powder additive and a sizing material additive, wherein the base powder additive comprises polyester resin and cellulose, and the mass ratio of the polyester resin to the cellulose is 100: 1.2; the sizing additive comprises 16 parts of butylated polyformaldehyde urea, 5 parts of tackifier and 8 parts of stabilizer in parts by weight.

The polyester resin comprises a polyester resin A which is purchased from NH-9508 of the Optimus Almus Material science and technology Limited company of Guangzhou and a polyester resin B which is purchased from NH-9001 of the Optimus Almus Material science and technology Limited company of Guangzhou; the mass ratio of the polyester resin A to the polyester resin B is 1: 1.

The procedure for preparing the wood grain transfer aluminum plate was the same as in example 1.

The compound was purchased from Zhongtian adhesive materials, Inc. of Dongguan.

Example 3

Embodiment 3 of the present invention provides a wood grain transfer aluminum sheet; the additive for the wood grain transfer aluminum plate comprises a base powder additive and a sizing material additive, wherein the base powder additive comprises polyester resin and cellulose, and the mass ratio of the polyester resin to the cellulose is 100: 3; the sizing additive comprises 19 parts by weight of butylated polyformaldehyde urea, 10 parts by weight of tackifier and 15 parts by weight of stabilizer.

The polyester resin comprises a polyester resin A which is purchased from NH-9508 of the Optimus Almus Material science and technology Limited company of Guangzhou and a polyester resin B which is purchased from NH-9001 of the Optimus Almus Material science and technology Limited company of Guangzhou; the mass ratio of the polyester resin A to the polyester resin B is 1: 1.3.

The compound was purchased from Zhongtian adhesive materials, Inc. of Dongguan.

Example 4

Embodiment 4 of the present invention provides a wood grain transfer aluminum plate, which is the same as embodiment 1 in the specific implementation manner, except that the mass ratio of the polyester resin a to the polyester resin B is 1: 3.

example 5

Embodiment 5 of the present invention provides a wood grain transfer aluminum plate, which is implemented in the same manner as embodiment 1 except that the polyester resin a is NH-8505 available from santa materials science and technology ltd, guangzhou.

Example 6

Embodiment 6 of the present invention provides a wood grain transfer aluminum plate, which is implemented in the same manner as in embodiment 1, except that the polyester resin B is NH-8081, which is available from santa guangzhou technologies ltd.

Example 7

Example 7 of the present invention provides a wood grain transfer aluminum sheet, which is the same as example 1 except that no polyester resin B is provided.

Example 8

Example 8 of the present invention provides a wood grain transfer aluminum sheet, which is the same as example 1 except that no polyester resin a is provided.

Example 9

Example 9 of the present invention provides a wood grain transfer aluminum sheet, which is embodied in the same manner as example 1, except that the hydroxypropylmethylcellulose is purchased from HG-K of Hebei Xingtai cellulose Co.

Example 10

Example 10 of the present invention provides a wood grain transfer aluminum sheet, which is the same as example 1 in the following specific embodiment, except that the mass ratio of the polyester resin to the cellulose is 100: 9.

example 11

Example 11 of the present invention provides a wood grain transfer aluminum sheet, which is the same as example 1 except that the base powder additive does not contain cellulose.

Example 12

Example 12 of the present invention provides a wood grain transfer aluminum sheet, which is the same as example 1 except that carboxymethyl cellulose is purchased from IM6 of xingle chemical company, ltd.

Example 13

Example 13 of the present invention provides a wood grain transfer aluminum panel in a manner similar to example 1, except that the size additive is free of stabilizers.

Example 14

Example 14 of the present invention provides a wood grain transfer aluminum sheet, which is similar to example 1, except that no primer additive is added.

Example 15

Example 15 of the present invention provides a wood grain transfer aluminum sheet, which is similar to example 1, except that no sizing agent additive is added.

Example 16

Example 16 of the present invention provides a wood grain transfer aluminum sheet, which is the same as example 1 in the specific embodiment, except that in the preparation step (3), the sizing additive, the sizing and water are mixed to obtain a mixed sizing, and the mixed sizing is coated on the coating after reaching a viscosity of 30 seconds of flowing under a No. 4 measuring cup.

Example 17

Example 17 of the present invention provides a wood grain transfer aluminum sheet, which is the same as example 1 in the specific embodiment except that in the preparation step (3), the sizing additive, the sizing and water are mixed to obtain a mixed sizing, and the mixed sizing is coated on the coating after reaching a viscosity of 5 seconds of flowing under a No. 4 measuring cup.

Example 18

Embodiment 18 of the present invention provides a wood grain transfer aluminum plate, which is the same as embodiment 1 in the specific implementation manner, except that the drying in the step (3) is performed by placing the aluminum plate on a production device with a conveying speed of 5.5m/min, conveying the aluminum plate in a drying tunnel with a temperature rise of 40 ℃ to 180 ℃ for 2.5min, conveying the aluminum plate in a drying tunnel with a temperature rise of 180 ℃ for 4min, and conveying the aluminum plate in a drying tunnel with a temperature drop of 40 ℃ for 2.5min at 180 ℃.

Example 19

Embodiment 19 of the present invention provides a wood grain transfer aluminum sheet, which is the same as embodiment 1 in the specific implementation manner, except that the drying in step (3) is performed by placing the aluminum sheet on a production facility with a conveying speed of 3.5m/min, conveying the aluminum sheet in a drying tunnel with a temperature rise of 40 ℃ to 180 ℃ for 3.8min, conveying the aluminum sheet in a drying tunnel with a temperature rise of 180 ℃ for 6.5min, and conveying the aluminum sheet in a drying tunnel with a temperature drop of 40 ℃ for 3.8 min.

Performance testing

1. Transfer effect test

And observing whether the surface of the wood grain transfer printing aluminum plate prepared in the embodiment has the phenomena of different depths, unclear wood grains, wrinkles, flow marks, bubbling or cocked wood grain paper in the transfer printing process, wherein the phenomena are marked as unqualified, and the phenomena are marked as qualified otherwise.

2. Test for difficulty in tearing and residual oil mark

Observing whether the wood grain transfer printing aluminum plate prepared in the embodiment is easy to tear off the wood grain paper after transfer printing and whether the surface of the aluminum plate has residual oil marks or not, wherein the easy-to-tear paper and the plate surface have no residual oil marks A; easily torn paper, residual oil marks on the board surface or difficult paper tearing, and residual oil marks on the board surface are marked as B; the paper is not easy to tear, and the residual oil marks on the surface of the board are marked as C.

3. Salt spray resistance test

And (3) carrying out a salt spray resistance test on the wood grain transfer aluminum plate prepared in the embodiment according to GB/T1771-91, wherein the salt spray resistance time is recorded as A when being more than or equal to 1000h, the salt spray resistance time is recorded as B when being 500-1000 h, and the salt spray resistance time is recorded as C when being less than or equal to 500 h.

4. Gloss measurement

Using an LS192 gloss meter to perform a gloss test on the surface of the wood grain transfer printing aluminum plate, wherein A is recorded when the gloss is more than or equal to 94; marking as B when the glossiness is 90-94; the gloss is less than or equal to 90 and is marked as C.

5. Hardness test

Carrying out pencil hardness test on the wood grain transfer aluminum plate prepared in the embodiment according to GB/T23443-2009-7.7 and GB/T6739-2006, wherein the wood grain transfer aluminum plate with the hardness value of not less than 1H is marked as qualified; otherwise, the test is recorded as unqualified.

TABLE 1

TABLE 2

	Transfer effect	Difficult and easy to tear and residual oil marks	Resistance to salt fog
				Example 4	Fail to be qualified	A	B
Example 5	Fail to be qualified	B	B
				Example 6	Fail to be qualified	B	B
Example 7	Fail to be qualified	C	C
				Example 8	Fail to be qualified	A	C

TABLE 3

	Transfer effect	Resistance to salt fog	Degree of gloss
				Example 9	Fail to be qualified	B	B
Example 10	Fail to be qualified	B	B
				Example 11	Fail to be qualified	C	C

TABLE 4

TABLE 5

	Transfer effect	Difficult and easy to tear and residual oil marks
			Example 16	Fail to be qualified	C
Example 17	Fail to be qualified	C
			Example 18	Fail to be qualified	B
Example 19	Fail to be qualified	B

As can be seen from tables 1-5 and FIGS. 1-5, in the preparation of the wood grain transfer printing aluminum plate, the wood grain paper is easy to tear away, no residual oil marks are left, the transfer printing effect is improved, the problems of different depths, unclear wood grains, wrinkles, flow marks, bubbling or warping of the wood grain paper in the transfer printing process are solved, the glossiness of the surface of the transfer printing pattern is improved, and the hardness and the salt spray resistance of the surface of the wood grain transfer printing aluminum plate are improved.

In addition, the wood grain transfer aluminum plate prepared in example 3 was subjected to an adhesion test according to the cross-cut method with reference to GB/T23443-2009-7.6.2, GB/T9286-1998(2004), and was rated 0 under dry, wet, and boiled water conditions; the surface was unchanged for 24h in hydrochloric acid tolerant test in 2% HC1(V/V) with reference to GB/T23443-2009-7.8.1.1; carrying out a nitric acid resistance test with reference to GB/T23443-2009-7.8.1.2, wherein the nitric acid resistance test is free from changes such as bubbles; solvent resistance test is carried out according to GB/T23443-2009-7.8.3.1, and no bottom leakage phenomenon occurs; the impact resistance test is carried out by referring to GB/T23443-2009-7.11 and GB/T1732-1993(2004), the front and back aluminum materials have no cracks, and the coating has no shedding and cracking phenomena, and has excellent performance, thereby being worthy of popularization and use.

The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.

Claims

1. The additive for the wood grain transfer aluminum plate is characterized by comprising a base powder additive and a sizing material additive, wherein the base powder additive comprises polyester resin and cellulose, and the mass ratio of the polyester resin to the cellulose is 100: (1.2-3); the sizing material additive comprises 16-19 parts by weight of butylated polyformaldehyde urea, 5-10 parts by weight of tackifier and 8-15 parts by weight of stabilizer.

2. The additive for a wood grain transfer aluminum plate as claimed in claim 1, wherein the polyester resin has an acid value of 18 to 60mgKOH/g and a melt viscosity of 4000 to 5500mPa.s at 200 ℃.

3. The wood grain transfer printing aluminum plate prepared by the additive for the wood grain transfer printing aluminum plate according to any one of claims 1-2.

4. The wood grain transfer aluminum plate according to claim 3, wherein the aluminum plate, the coating layer, the adhesive layer and the wood grain layer are arranged from top to bottom.

5. The wood grain transfer aluminum plate according to claim 4, wherein the coating thickness is 70-80 μm.

6. The method for preparing a wood grain transfer printing aluminum plate according to any one of claims 3 to 5, characterized by at least comprising the following steps:

(1) cleaning an aluminum plate, and drying after pretreatment;

7. The method for preparing a wood grain transfer printing aluminum plate according to claim 6, wherein the drying in the step (2) is that the aluminum plate is placed on a production device with a conveying speed of 2-3 m/min, and is conveyed for 7-8 min in a drying tunnel with the temperature of 30 ℃ rising to 200 ℃, 9-10 min in the drying tunnel with the temperature of 200 ℃ and 7-8 min in a drying tunnel with the temperature of 200 ℃ falling by 70 ℃.

8. The method for preparing a wood grain transfer aluminum plate according to the claim 6, wherein the viscosity of the mixed sizing material in the step (3) is up to 18s flowing under a No. 4 measuring cup.

9. The method for preparing a wood grain transfer printing aluminum plate according to claim 6, wherein the drying in the step (3) is that the aluminum plate is placed on a production device with a conveying speed of 4-4.5 m/min, and is conveyed for 3-4 min in a drying tunnel with the temperature of 40 ℃ rising to 180 ℃, 5-8 min in a drying tunnel with the temperature of 180 ℃ falling for 3-4 min in the drying tunnel with the temperature of 180 ℃ falling.

10. The method for preparing the wood grain transfer printing aluminum plate as claimed in claim 6, wherein the glue coating amount of the mixed glue stock in the step (3) is 1 kg/15-20 m²。