阅读说明：本技术 一种纸板的表面处理工艺 (Surface treatment process of paperboard ) 是由 邓敬贤 于 2021-08-10 设计创作，主要内容包括：本发明公开了一种纸板的表面处理工艺,属于纸板加工技术领域,包括如下步骤：(1)质子辐照处理；(2)喷覆处理；(3)声-磁耦合处理；(4)低温真空干燥处理；(5)紫外固化处理。本发明提供了一种纸板的表面处理工艺,有效地提高了纸板的表面印刷特性,扩宽了纸板的应用范围,并赋予纸板持久防霉抗菌性,对大肠杆菌的杀菌率高达99.55%,金黄色葡萄球菌的杀菌率高达100%,于25～30℃,湿度为65～75%的环境中放置26周都未见出现发霉现象,抗菌效果显著,很大程度上提升了纸板的品质,延长了纸板的使用寿命。(The invention discloses a surface treatment process of a paperboard, belonging to the technical field of paperboard processing, and comprising the following steps: (1) proton irradiation treatment; (2) spraying and covering; (3) acoustic-magnetic coupling processing; (4) carrying out low-temperature vacuum drying treatment; (5) and (5) ultraviolet curing treatment. The surface treatment process of the paperboard effectively improves the surface printing characteristic of the paperboard, widens the application range of the paperboard, endows the paperboard with lasting mildew-proof and antibacterial properties, has the sterilization rate of 99.55 percent on escherichia coli and 100 percent on staphylococcus aureus, does not have the mildew phenomenon after being placed in an environment with the temperature of 25-30 ℃ and the humidity of 65-75 percent for 26 weeks, has obvious antibacterial effect, greatly improves the quality of the paperboard, and prolongs the service life of the paperboard.)

1. The surface treatment process of the paperboard is characterized by comprising the following steps:

(1) proton irradiation treatment:

irradiating the surface of the paperboard to be processed by using low-energy protons, and taking out the paperboard for later use after completion;

(2) spraying treatment:

uniformly spraying a treating agent on the surface of the paperboard subjected to the proton irradiation treatment in the step (1) for later use;

(3) acoustic-magnetic coupling processing:

placing the paper board subjected to the spray coating treatment in the step (2) in an acoustic-magnetic coupling environment for acoustic-magnetic coupling treatment, and taking out the paper board for later use after the acoustic-magnetic coupling treatment is completed;

(4) low-temperature vacuum drying treatment:

placing the paperboard subjected to the acoustic-magnetic coupling treatment in the step (3) into a vacuum drying oven for low-temperature vacuum drying treatment, and taking out for later use after the low-temperature vacuum drying treatment is completed;

(5) ultraviolet curing treatment:

and (4) placing the low-temperature vacuum drying treatment in the step (4) under an ultraviolet lamp for ultraviolet curing treatment.

2. The surface treatment process of the paperboard according to claim 1, wherein the technical parameters of the low-energy proton irradiation treatment in the step (1) are as follows: the irradiation energy is 2-3 MeV, the beam current is 0.3-0.5 nA, and the irradiation dose is 4-5 multiplied by 10¹⁰H⁺/cm²The treatment time is 6-10 min.

3. The surface treatment process of the paperboard according to claim 1, wherein the preparation of the treating agent in the step (2) comprises the following steps:

1) uniformly mixing nano zinc oxide and sepiolite powder according to the weight ratio of 1: 20-24, and then placing the mixture into a superfine crusher for crushing treatment to obtain mixed powder A for later use;

2) carrying out flame treatment on the mixed powder A obtained in the step 1) by using flame outer flame, carrying out ultrasonic treatment while carrying out flame treatment, and obtaining a mixture B for later use after finishing the flame treatment;

3) soaking the mixed powder B obtained in the step 2) into a treatment solution, filtering and drying after soaking treatment to obtain mixed powder C for later use;

4) and (3) placing the mixed powder C obtained in the step 3), the soybean lecithin and the 75% ethanol together in a homogenizer according to the weight ratio of 1: 2-3: 8-10 for homogenization.

4. The surface treatment process of the paperboard according to claim 3, characterized in that the horizontal distance between the mixed powder A and the outer flame in the flame outer flame treatment in the step 2) is 4-8 mm, the treatment time is 7-9 min, and the ultrasonic frequency is controlled to be 20-40 kHz in the ultrasonic treatment.

5. A surface treatment process for a paperboard according to claim 3, characterized in that the treatment liquid in step 3) comprises the following components in percentage by weight: 0.8-0.9% of germacrene, 1.1-1.5% of dimethyl dicarbonate, 0.6-0.9% of 2, 4-dichlorophenoxyacetic acid, 0.2-0.24% of 4-hexylresorcinol, 1.3-1.7% of alpha-bisabolol, 0.8-1.4% of artemisinin, 2.1-2.5% of menthol and the balance of absolute ethyl alcohol.

6. A surface treatment process for a paperboard according to claim 1, wherein the sound wave frequency is controlled to be 40 to 60kHz, the magnetic field strength is controlled to be 1000 to 1600mT, and the sound-magnetic coupling treatment time is controlled to be 20 to 30min in the sound-magnetic coupling treatment in the step (3).

7. The surface treatment process of the paperboard according to claim 1, characterized in that the low-temperature vacuum drying treatment in the step (4) is carried out at a temperature of 25-31 ℃ and a vacuum degree of 1.66-2.22 Pa until the surface moisture content is 0.6-0.9%.

8. The surface treatment process of the paperboard according to claim 1, wherein the ultraviolet wavelength is controlled to be 200-400 nm during the ultraviolet curing treatment in the step (5), and the treatment time is 23-27 min.

Technical Field

The invention relates to the technical field of paperboard processing, in particular to a surface treatment process of a paperboard.

Background

The reform is opened, the support of national industrial policy and the mass entrance of foreign resources, and the paper making industry of China is rapidly developed. According to the data reported in 2013 years by the Chinese paper making Association, about 3400 families of China's common paper and paperboard production enterprises in 2013 years, the annual paper and paperboard yield is 10110 ten thousand tons, the paper and paperboard consumption is 9782 ten thousand tons, and the per capita paper and paperboard consumption is 72 kilograms. In the last decade, the annual increase of the paper and paperboard output in China is 8.26%, and the annual increase of the paper and paperboard consumption is 6.74%, which becomes the biggest world paper product production and consumption country. Meanwhile, the paper products in China are rapidly developed to the foreign trade, only 106.36 ten thousand tons of paper products are exported in 1995, 358.55 ten thousand tons of paper products are imported, the paper products in China are already 866.35 thousand tons and 297.07 thousand tons of paper products are imported in 2013, China is changed from the net-entry country of the paper products to the net-exit country, and the paper products play an important role in the international paper product market. ,

as the export of paper products is rapidly increasing, the requirements for the product characteristics of the paper products, such as mildew resistance and antibacterial property, and the printing aesthetic property, are becoming higher and higher. Although there is more and more research in this regard today, the following problems still exist:

(1) the current technical means for enhancing the mildew-proof and antibacterial properties is to spray a mildew-proof antibacterial agent on the surface of a paperboard, and the method only has short-term mildew-proof and antibacterial properties and has no durability;

(2) the surface of the paperboard is coated with the protective film layer, and the method can reduce the surface printing and dyeing characteristics of the paperboard due to the existence of the film layer, thereby limiting the popularization and application of the paperboard to a great extent.

Therefore, it is highly desirable to provide a surface treatment process for paperboard, which can enhance the printing and dyeing properties of the paperboard while maintaining the durable antibacterial properties of the paperboard.

Disclosure of Invention

Aiming at the defects in the prior art, the first purpose of the invention is to provide a surface treatment process of a paperboard, which has the characteristics of good printing and dyeing characteristics and good mildew and bacteria resistance.

In order to achieve the purpose, the invention provides the following technical scheme:

a surface treatment process of a paperboard comprises the following steps:

(1) proton irradiation treatment:

irradiating the surface of the paperboard to be processed by using low-energy protons, and taking out the paperboard for later use after completion;

(2) spraying treatment:

uniformly spraying a treating agent on the surface of the paperboard subjected to the proton irradiation treatment in the step (1) for later use;

(3) acoustic-magnetic coupling processing:

placing the paper board subjected to the spray coating treatment in the step (2) in an acoustic-magnetic coupling environment for acoustic-magnetic coupling treatment, and taking out for standby after the acoustic-magnetic coupling treatment is completed;

(4) low-temperature vacuum drying treatment:

placing the paperboard subjected to the acoustic-magnetic coupling treatment in the step (3) into a vacuum drying oven for low-temperature vacuum drying treatment, and taking out for later use after the low-temperature vacuum drying treatment is completed;

(5) ultraviolet curing treatment:

and (4) placing the low-temperature vacuum drying treatment in the step (4) under an ultraviolet lamp for ultraviolet curing treatment.

Further, the technical parameters of the low-energy proton irradiation treatment in the step (1) are as follows: the irradiation energy is 2-3 MeV, the beam current is 0.3-0.5 nA, and the irradiation dose is 4-5 multiplied by 10¹⁰H⁺/cm²The treatment time is 6-10 min.

By adopting the technical scheme, the proton irradiation treatment is carried out on the paperboard to be treated by utilizing the characteristic of low-energy proton irradiation, the technical parameters of the treatment are strictly controlled, the surface of the paperboard is slightly roughened, the specific surface area of the paperboard is improved, and the foundation is laid for the subsequent operation.

Further, the preparation of the treating agent in the step (2) comprises the following steps:

1) uniformly mixing nano zinc oxide and sepiolite powder according to the weight ratio of 1: 20-24, and then placing the mixture into a superfine crusher for crushing treatment to obtain mixed powder A for later use;

2) carrying out flame treatment on the mixed powder A obtained in the step 1) by using flame outer flame, carrying out ultrasonic treatment while carrying out flame treatment, and obtaining a mixture B for later use after finishing the flame treatment;

3) soaking the mixed powder B obtained in the step 2) into a treatment solution, filtering and drying after soaking treatment to obtain mixed powder C for later use;

4) and (3) placing the mixed powder C obtained in the step 3), the soybean lecithin and the 75% ethanol together in a homogenizer according to the weight ratio of 1: 2-3: 8-10 for homogenization.

Further, the horizontal distance between the mixed powder A and the outer flame during the outer flame treatment in the step 2) is 4-8 mm, the treatment time is 7-9 min, and the frequency of ultrasonic waves is controlled to be 20-40 kHz during the ultrasonic treatment.

Further, the treating fluid in the step 3) comprises the following components in percentage by weight: 0.8-0.9% of germacrene, 1.1-1.5% of dimethyl dicarbonate, 0.6-0.9% of 2, 4-dichlorophenoxyacetic acid, 0.2-0.24% of 4-hexylresorcinol, 1.3-1.7% of alpha-bisabolol, 0.8-1.4% of artemisinin, 2.1-2.5% of menthol and the balance of absolute ethyl alcohol.

In summary, compared with the prior art, the invention has the following beneficial effects:

(1) the invention utilizes the characteristic of low-energy proton irradiation to perform proton irradiation treatment on the paperboard to be treated, strictly controls the technical parameters of the treatment, slightly roughens the surface of the paperboard, improves the specific surface area of the paperboard and lays a foundation for subsequent operation;

(2) the invention evenly sprays a special treating agent on the surface of a paper board treated by proton irradiation, the special treating agent is fast and tightly adhered on the surface of the paper board, the paper board has good printing characteristic and has durable antibacterial property, the function is realized mainly by the action of the treating agent, in the preparation of the treating agent, firstly, nano zinc oxide and sepiolite are jointly placed in an ultramicro crusher according to a proper proportion for ultramicro crushing treatment to obtain refined and sterile mixed powder, the mixed powder is subjected to flame treatment, the molecular movement speed is accelerated by ultrasonic waves, meanwhile, the activity of the mixed powder can be deeply improved by combining the flame treatment, at the moment, the mixed powder is immersed in the treating fluid, the mixed powder is quickly infiltrated by the treating fluid, the mixed powder adsorbs effective components in the treating fluid, and the mildew-proof and antibacterial properties of the mixed powder are endowed, the components, soybean lecithin and 75% ethanol are subjected to homogenization treatment according to a proper weight ratio to obtain a homogenized and refined treatment agent, the treatment agent can effectively improve the surface wettability of the paperboard and improve the marking and printing characteristics of the paperboard, and the mildewproof and bactericidal components can be slowly released in the use of the paperboard, so that the paperboard has lasting mildewproof and antibacterial properties;

(3) the sprayed paperboard is placed in an acoustic-magnetic coupling environment for acoustic-magnetic coupling treatment, and the effects of acoustic flow effect, cavitation effect, thermal effect and the like of ultrasonic waves and a magnetic field act on the paperboard in a synergistic manner, so that on one hand, the surface activity of the paperboard is improved, on the other hand, the homogenization and refinement of a paperboard surface treating agent are promoted, the surface compactness is improved, the mildew resistance and the antibacterial property of the paperboard are further improved, and the surface properties of the paperboard, such as the surface flatness, the glossiness and the like, can be improved;

(4) the invention carries out low-temperature drying treatment under vacuum condition, the temperature of the paperboard is slowly increased from outside to inside to generate certain steam pressure, and the permeability of the paperboard is improved under the action of the steam pressure, thereby realizing the effect of low-temperature quick drying and strengthening the action effect of the treating agent. And carrying out ultraviolet curing treatment to remove the possible roughened structures on the surface of the paperboard and further refine the surface of the paperboard.

(5) The surface treatment process of the paperboard effectively improves the surface printing characteristic of the paperboard, widens the application range of the paperboard, endows the paperboard with lasting mildew-proof and antibacterial properties, has the sterilization rate of 99.55 percent on escherichia coli and 100 percent on staphylococcus aureus, does not have the mildew phenomenon after being placed in an environment with the temperature of 25-30 ℃ and the humidity of 65-75 percent for 26 weeks, has obvious antibacterial effect, greatly improves the quality of the paperboard, and prolongs the service life of the paperboard.

Detailed Description

The present invention will be described in detail with reference to examples.

Example 1:

a surface treatment process of a paperboard comprises the following steps:

(1) proton irradiation treatment:

irradiating the surface of the paperboard to be treated by using low-energy protons, wherein the irradiation energy is 2MeV, the beam current is 0.3nA, and the irradiation dose is 4 multiplied by 10¹⁰H⁺/cm²Taking out for later use after 6min of treatment;

(2) spraying treatment:

uniformly spraying a treating agent on the surface of the paperboard subjected to the proton irradiation treatment in the step (1) for later use;

(3) acoustic-magnetic coupling processing:

placing the paper board subjected to the spray coating treatment in the step (2) in an acoustic-magnetic coupling environment for acoustic-magnetic coupling treatment, controlling the acoustic frequency to be 40kHz and the magnetic field intensity to be 1000mT, and taking out for later use after 20min of treatment;

(4) low-temperature vacuum drying treatment:

placing the paperboard subjected to the acoustic-magnetic coupling treatment in the step (3) into a vacuum drying oven for low-temperature vacuum drying treatment, controlling the temperature to be 25 ℃ and the vacuum degree to be 1.66Pa, drying until the surface water content is 0.6%, and taking out for later use;

(5) ultraviolet curing treatment:

and (4) placing the low-temperature vacuum drying treatment in the step (4) under an ultraviolet lamp for ultraviolet curing treatment, wherein the wavelength of ultraviolet is controlled to be 200nm during the ultraviolet curing treatment, and the treatment time is 23 min.

The preparation of the treating agent in the step (2) comprises the following steps:

1) uniformly mixing nano zinc oxide and sepiolite powder according to the weight ratio of 1:20, and then placing the mixture into a superfine crusher for crushing treatment to obtain mixed powder A for later use;

2) carrying out flame treatment on the mixed powder A obtained in the step 1) by using flame outer flames, wherein the horizontal distance between the mixed powder A and the outer flames is 4mm during the flame treatment, the treatment time is 7min, carrying out ultrasonic treatment while carrying out the flame treatment, and controlling the frequency of ultrasonic waves to be 20kHz to obtain a mixture B for later use;

3) soaking the mixed powder B obtained in the step 2) into a treatment solution, filtering and drying after soaking treatment to obtain mixed powder C for later use, wherein the treatment solution comprises the following components in percentage by weight: germacrene 0.8%, dimethyl dicarbonate 1.1%, 2, 4-dichlorophenoxyacetic acid 0.6%, 4-hexylresorcinol 0.2%, alpha-bisabolol 1.3%, artemisinin 0.8%, menthol 2.1%, and the balance of absolute ethanol;

4) placing the mixed powder C obtained in the step 3), the soybean lecithin and the 75% ethanol together in a homogenizing machine according to the weight ratio of 1:2:8 for homogenizing.

Example 2:

a surface treatment process of a paperboard comprises the following steps:

(1) proton irradiation treatment:

irradiating the surface of the paperboard to be treated by using low-energy protons, wherein the irradiation energy is 2.5MeV, the beam current is 0.4nA, and the irradiation dose is 4.5 multiplied by 10¹⁰H⁺/cm²Treating for 8min, and taking out;

(2) spraying treatment:

uniformly spraying a treating agent on the surface of the paperboard subjected to the proton irradiation treatment in the step (1) for later use;

(3) acoustic-magnetic coupling processing:

placing the paper board subjected to the spray coating treatment in the step (2) in an acoustic-magnetic coupling environment for acoustic-magnetic coupling treatment, controlling the acoustic frequency to be 50kHz and the magnetic field intensity to be 1300mT, and taking out for later use after 25min of treatment;

(4) low-temperature vacuum drying treatment:

placing the paperboard subjected to the acoustic-magnetic coupling treatment in the step (3) into a vacuum drying oven for low-temperature vacuum drying treatment, controlling the temperature to be 28 ℃ and the vacuum degree to be 1.94Pa, drying until the surface water content is 0.75%, and taking out for later use;

(5) ultraviolet curing treatment:

and (4) placing the low-temperature vacuum drying treatment in the step (4) under an ultraviolet lamp for ultraviolet curing treatment, wherein the wavelength of ultraviolet is controlled to be 300nm during the ultraviolet curing treatment, and the treatment time is 25 min.

The preparation of the treating agent in the step (2) comprises the following steps:

1) uniformly mixing nano zinc oxide and sepiolite powder according to the weight ratio of 1:22, and then placing the mixture into a superfine crusher for crushing treatment to obtain mixed powder A for later use;

2) carrying out flame treatment on the mixed powder A obtained in the step 1) by using flame outer flames, wherein the horizontal distance between the mixed powder A and the outer flames is 6mm during the flame treatment, the treatment time is 8min, carrying out ultrasonic treatment while carrying out the flame treatment, and controlling the frequency of ultrasonic waves to be 30kHz to obtain a mixture B for later use;

3) soaking the mixed powder B obtained in the step 2) into a treatment solution, filtering and drying after soaking treatment to obtain mixed powder C for later use, wherein the treatment solution comprises the following components in percentage by weight: germacrene 0.85%, dimethyl dicarbonate 1.3%, 2, 4-dichlorophenoxyacetic acid 0.75%, 4-hexylresorcinol 0.22%, alpha-bisabolol 1.5%, artemisinin 1.1%, menthol 2.3%, and the balance of absolute ethanol;

4) and (3) placing the mixed powder C obtained in the step 3), the soybean lecithin and the 75% ethanol together in a homogenizer according to the weight ratio of 1:2.5:9 for homogenization.

Example 3:

a surface treatment process of a paperboard comprises the following steps:

(1) proton irradiation treatment:

irradiating the surface of the paperboard to be processed by using low-energy protons, wherein the irradiation energy is 3MeV, the beam current is 0.5nA, and the irradiation dose is 5 multiplied by 10¹⁰H⁺/cm²Taking out for later use after 10min of treatment;

(2) spraying treatment:

uniformly spraying a treating agent on the surface of the paperboard subjected to the proton irradiation treatment in the step (1) for later use;

(3) acoustic-magnetic coupling processing:

placing the paper board subjected to the spray coating treatment in the step (2) in an acoustic-magnetic coupling environment for acoustic-magnetic coupling treatment, controlling the acoustic frequency to be 60kHz and the magnetic field intensity to be 1600mT, and taking out for later use after 30min of treatment;

(4) low-temperature vacuum drying treatment:

placing the paperboard subjected to the acoustic-magnetic coupling treatment in the step (3) into a vacuum drying oven for low-temperature vacuum drying treatment, controlling the temperature to be 31 ℃ and the vacuum degree to be 2.22Pa, drying until the surface water content is 0.9%, and taking out for later use;

(5) ultraviolet curing treatment:

and (4) placing the low-temperature vacuum drying treatment in the step (4) under an ultraviolet lamp for ultraviolet curing treatment, wherein the wavelength of ultraviolet is controlled to be 400nm during the ultraviolet curing treatment, and the treatment time is 27 min.

The preparation of the treating agent in the step (2) comprises the following steps:

1) uniformly mixing nano zinc oxide and sepiolite powder according to the weight ratio of 1:24, and then placing the mixture into a superfine crusher for crushing treatment to obtain mixed powder A for later use;

2) carrying out flame treatment on the mixed powder A obtained in the step 1) by using flame outer flames, wherein the horizontal distance between the mixed powder A and the outer flames is 8mm during the flame treatment, the treatment time is 9min, carrying out ultrasonic treatment while carrying out the flame treatment, and controlling the frequency of ultrasonic waves to be 40kHz to obtain a mixture B for later use;

3) soaking the mixed powder B obtained in the step 2) into a treatment solution, filtering and drying after soaking treatment to obtain mixed powder C for later use, wherein the treatment solution comprises the following components in percentage by weight: germacrene 0.9%, dimethyl dicarbonate 1.5%, 2, 4-dichlorophenoxyacetic acid 0.9%, 4-hexylresorcinol 0.24%, alpha-bisabolol 1.7%, artemisinin 1.4%, menthol 2.5%, and the balance of absolute ethanol;

4) placing the mixed powder C obtained in the step 3), the soybean lecithin and the 75% ethanol together in a homogenizing machine according to the weight ratio of 1:3:10 for homogenizing.

Comparative example 1:

a surface treatment process of a paperboard comprises the following steps:

(1) spraying treatment:

uniformly spraying a treating agent on the surface of the paperboard to be treated for later use;

(2) acoustic-magnetic coupling processing:

placing the paper board subjected to the spray coating treatment in the step (1) in an acoustic-magnetic coupling environment for acoustic-magnetic coupling treatment, controlling the acoustic frequency to be 50kHz and the magnetic field intensity to be 1300mT, and taking out for later use after 25min of treatment;

(3) low-temperature vacuum drying treatment:

placing the paperboard subjected to the acoustic-magnetic coupling treatment in the step (2) into a vacuum drying oven for low-temperature vacuum drying treatment, controlling the temperature to be 28 ℃ and the vacuum degree to be 1.94Pa, drying until the surface water content is 0.75%, and taking out for later use;

(4) ultraviolet curing treatment:

and (4) placing the low-temperature vacuum drying treatment in the step (3) under an ultraviolet lamp for ultraviolet curing treatment, wherein the wavelength of ultraviolet is controlled to be 300nm during the ultraviolet curing treatment, and the treatment time is 25 min.

The preparation of the treating agent in the step (1) comprises the following steps:

1) uniformly mixing nano zinc oxide and sepiolite powder according to the weight ratio of 1:22, and then placing the mixture into a superfine crusher for crushing treatment to obtain mixed powder A for later use;

2) carrying out flame treatment on the mixed powder A obtained in the step 1) by using flame outer flames, wherein the horizontal distance between the mixed powder A and the outer flames is 6mm during the flame treatment, the treatment time is 8min, carrying out ultrasonic treatment while carrying out the flame treatment, and controlling the frequency of ultrasonic waves to be 30kHz to obtain a mixture B for later use;

3) soaking the mixed powder B obtained in the step 2) into a treatment solution, filtering and drying after soaking treatment to obtain mixed powder C for later use, wherein the treatment solution comprises the following components in percentage by weight: germacrene 0.85%, dimethyl dicarbonate 1.3%, 2, 4-dichlorophenoxyacetic acid 0.75%, 4-hexylresorcinol 0.22%, alpha-bisabolol 1.5%, artemisinin 1.1%, menthol 2.3%, and the balance of absolute ethanol;

4) and (3) placing the mixed powder C obtained in the step 3), the soybean lecithin and the 75% ethanol together in a homogenizer according to the weight ratio of 1:2.5:9 for homogenization.

Comparative example 2:

a surface treatment process of a paperboard comprises the following steps:

(1) proton irradiation treatment:

irradiating the surface of the paperboard to be treated by using low-energy protons, wherein the irradiation energy is 2.5MeV, the beam current is 0.4nA, and the irradiation dose is 4.5 multiplied by 10¹⁰H⁺/cm²Treating for 8min, and taking out;

(2) acoustic-magnetic coupling processing:

placing the paper board subjected to proton irradiation treatment in the step (1) in an acoustic-magnetic coupling environment for acoustic-magnetic coupling treatment, controlling the acoustic frequency to be 50kHz and the magnetic field intensity to be 1300mT, and taking out for later use after 25min of treatment;

(3) low-temperature vacuum drying treatment:

placing the paperboard subjected to the acoustic-magnetic coupling treatment in the step (2) into a vacuum drying oven for low-temperature vacuum drying treatment, controlling the temperature to be 28 ℃ and the vacuum degree to be 1.94Pa, drying until the surface water content is 0.75%, and taking out for later use;

(4) ultraviolet curing treatment:

and (4) placing the low-temperature vacuum drying treatment in the step (3) under an ultraviolet lamp for ultraviolet curing treatment, wherein the wavelength of ultraviolet is controlled to be 300nm during the ultraviolet curing treatment, and the treatment time is 25 min.

Comparative example 3:

a surface treatment process of a paperboard comprises the following steps:

(1) proton irradiation treatment:

irradiating the surface of the paperboard to be treated by using low-energy protons, wherein the irradiation energy is 2.5MeV, the beam current is 0.4nA, and the irradiation dose is 4.5 multiplied by 10¹⁰H⁺/cm²Treating for 8min, and taking out;

(2) spraying treatment:

uniformly spraying a treating agent on the surface of the paperboard subjected to the proton irradiation treatment in the step (1) for later use;

(3) low-temperature vacuum drying treatment:

placing the paperboard subjected to spray coating treatment in the step (2) into a vacuum drying oven for low-temperature vacuum drying treatment, controlling the temperature at 28 ℃ and the vacuum degree at 1.94Pa, and drying until the surface moisture content is 0.75% and taking out for later use;

(4) ultraviolet curing treatment:

and (4) placing the low-temperature vacuum drying treatment in the step (3) under an ultraviolet lamp for ultraviolet curing treatment, wherein the wavelength of ultraviolet is controlled to be 300nm during the ultraviolet curing treatment, and the treatment time is 25 min.

The preparation of the treating agent in the step (2) comprises the following steps:

1) uniformly mixing nano zinc oxide and sepiolite powder according to the weight ratio of 1:22, and then placing the mixture into a superfine crusher for crushing treatment to obtain mixed powder A for later use;

2) carrying out flame treatment on the mixed powder A obtained in the step 1) by using flame outer flames, wherein the horizontal distance between the mixed powder A and the outer flames is 6mm during the flame treatment, the treatment time is 8min, carrying out ultrasonic treatment while carrying out the flame treatment, and controlling the frequency of ultrasonic waves to be 30kHz to obtain a mixture B for later use;

3) soaking the mixed powder B obtained in the step 2) into a treatment solution, filtering and drying after soaking treatment to obtain mixed powder C for later use, wherein the treatment solution comprises the following components in percentage by weight: germacrene 0.85%, dimethyl dicarbonate 1.3%, 2, 4-dichlorophenoxyacetic acid 0.75%, 4-hexylresorcinol 0.22%, alpha-bisabolol 1.5%, artemisinin 1.1%, menthol 2.3%, and the balance of absolute ethanol;

4) and (3) placing the mixed powder C obtained in the step 3), the soybean lecithin and the 75% ethanol together in a homogenizer according to the weight ratio of 1:2.5:9 for homogenization.

Comparative example 4:

a surface treatment process of a paperboard comprises the following steps:

(1) proton irradiation treatment:

irradiating the surface of the paperboard to be treated by using low-energy protons, wherein the irradiation energy is 2.5MeV, the beam current is 0.4nA, and the irradiation dose is 4.5 multiplied by 10¹⁰H⁺/cm²Treating for 8min, and taking out;

(2) spraying treatment:

uniformly spraying a treating agent on the surface of the paperboard subjected to the proton irradiation treatment in the step (1) for later use;

(3) acoustic-magnetic coupling processing:

placing the paper board subjected to the spray coating treatment in the step (2) in an acoustic-magnetic coupling environment for acoustic-magnetic coupling treatment, controlling the acoustic frequency to be 50kHz and the magnetic field intensity to be 1300mT, and taking out for later use after 25min of treatment;

(4) low-temperature vacuum drying treatment:

and (4) placing the paperboard subjected to the acoustic-magnetic coupling treatment in the step (3) into a vacuum drying oven for low-temperature vacuum drying treatment, controlling the temperature to be 28 ℃ and the vacuum degree to be 1.94Pa, and drying until the surface water content is 0.75%.

The preparation of the treating agent in the step (2) comprises the following steps:

1) uniformly mixing nano zinc oxide and sepiolite powder according to the weight ratio of 1:22, and then placing the mixture into a superfine crusher for crushing treatment to obtain mixed powder A for later use;

2) carrying out flame treatment on the mixed powder A obtained in the step 1) by using flame outer flames, wherein the horizontal distance between the mixed powder A and the outer flames is 6mm during the flame treatment, the treatment time is 8min, carrying out ultrasonic treatment while carrying out the flame treatment, and controlling the frequency of ultrasonic waves to be 30kHz to obtain a mixture B for later use;

3) soaking the mixed powder B obtained in the step 2) into a treatment solution, filtering and drying after soaking treatment to obtain mixed powder C for later use, wherein the treatment solution comprises the following components in percentage by weight: germacrene 0.85%, dimethyl dicarbonate 1.3%, 2, 4-dichlorophenoxyacetic acid 0.75%, 4-hexylresorcinol 0.22%, alpha-bisabolol 1.5%, artemisinin 1.1%, menthol 2.3%, and the balance of absolute ethanol;

4) and (3) placing the mixed powder C obtained in the step 3), the soybean lecithin and the 75% ethanol together in a homogenizer according to the weight ratio of 1:2.5:9 for homogenization.

Blank control group

Untreated paperboard.

In order to compare the technical effects of the application, the same batch of paperboards with the same specification and model are selected as test objects, the selected paperboards are randomly divided into 6 groups with equal quality and quantity, wherein 1 group is a blank control group, 5 groups are test groups, then the paperboards of all groups are correspondingly treated by the methods of the embodiment 2 and the comparative embodiments 1-4, the paperboards treated by the methods of all groups and the paperboards of the blank control group are subjected to mildew-proof and antibacterial property tests and surface printing property tests, 6 parallel tests are simultaneously carried out on each group of tests, and the average value is taken as the final test result. The method specifically comprises the following steps:

(1) and (3) testing the mildew-proof antibacterial performance:

the antibacterial property of each group of plastic particles is determined by referring to the method of QB/T2591-2003, and the specific test comparison data are shown in the following table 1; and then placing the paper boards in an environment with the temperature of 25-30 ℃ and the humidity of 65-75%, starting to visually observe the bacterial infection area and the growth condition of the mould after 6 weeks, observing once every 4 weeks later, recording, and grading damage values according to a table 2 so as to evaluate the mould-proof and antibacterial effects, wherein the specific test comparison data are shown in a table 3 below.

TABLE 1 Sterilization results for large plant citrus and Staphylococcus aureus for each group of paperboard

As can be seen from table 1 above, by comparing the example 2 with the blank control group and comparing the comparative examples 1 to 4 with the example 2, the antibacterial property of the paperboard can be remarkably improved, the antibacterial rate of escherichia coli is as high as 99.55%, and the antibacterial rate of staphylococcus aureus is as high as 100%.

TABLE 2 damage value rating

Rating of damage value	Area of plastic molding
		0	Area of surface mildew<5% of surface without hypha
1	Surface mildew area 5-25%
		2	Surface mildew area 25-50%
3	Surface mildew area 50-75%
		4	Area of surface mildew>75％

TABLE 3 persistent mildew and mildew resistance of each group of boardsBacterial results

	6 weeks	For 10 weeks	14 weeks	For 18 weeks	22 weeks	For 26 weeks
							Blank control group	0	1	1	2	4	4
Example 2	0	0	0	0	0	0
							Comparative example 1	0	0	0	0	1	1
Comparative example 2	0	0	1	3	4	4
							Comparative example 3	0	0	0	0	1	2
Comparative example 4	0	0	0	1	2	3

As can be seen from the table 3, the paperboard treated by the method has excellent antibacterial property, and the mildew-proof antibacterial property has good durability, so that the quality of the paperboard is improved to a great extent, and the service life of the paperboard is prolonged.

(2) Testing of printing characteristics:

the same printing method is adopted to print various groups of paperboards (including a blank control group of paperboards), and the 60-degree gloss, the tinting strength and the rubbing fastness at 180-degree are tested after printing. Specific experimental comparison data are shown in table 4:

TABLE 4 gloss at 60 deg., tinting strength and crockfastness results at 180 deg. for each group of boards

As can be seen from table 4 above, the present application provides a surface treatment process for a paperboard, which effectively improves the surface printing characteristics of the paperboard and widens the application range of the paperboard.

The embodiments of the present invention are the preferred embodiments of the present invention, and the scope of the present invention is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention should be covered within the protection scope of the invention.