阅读说明：本技术 水性哑光涂层的制备方法 (Preparation method of water-based matte coating ) 是由 张建林 张黎明 于 2021-08-23 设计创作，主要内容包括：为了解决铝塑复合膜在涂布哑光层的时候观感上有种发灰的感觉且涂布不均匀的问题,本发明提出水性哑光涂层的制备方法,通过将水、丙烯酸、二氧化硅的混合液涂布在铝塑复合膜需要哑光处理的表层,使铝塑膜达到了哑光的效果,本发明操作简单,便于制造,铝塑膜涂布牢固,封装安全可靠,给人以高雅之感。(In order to solve the problems that the aluminum-plastic composite film has a grayed appearance and is unevenly coated when the matte layer is coated, the invention provides the preparation method of the water-based matte coating.)

1. The preparation method of the water-based matte coating is characterized by comprising the following steps: the method comprises the following implementation steps:

(1) mixing water and acrylic acid, and stirring for 4-6 min;

(2) adding silicon dioxide into the mixture of the stirred water and the acrylic acid, and continuously stirring for 8-12min to uniformly mix the water, the acrylic acid and the silicon dioxide;

(3) coating a mixed solution of water, acrylic acid and silicon dioxide on the surface layer of the aluminum-plastic composite film needing matte treatment;

(4) and curing the coated aluminum-plastic composite film in a curing chamber.

2. The method of preparing the aqueous matte coating of claim 1, wherein: the temperature for mixing and stirring the water, the acrylic acid and the silicon dioxide in the step (1) and the step (2) is 20-30 ℃.

3. The method of preparing the aqueous matte coating of claim 1, wherein: the coating roller used for coating in the step (3) is a 200-mesh plate roller, and the coating times are 2-3.

4. The method of preparing the aqueous matte coating of claim 1, wherein: and (3) curing the coated aluminum-plastic composite film in the step (4) in a curing chamber at the temperature of 50-60 ℃ for 70-75H.

5. The method of preparing the aqueous matte coating of claim 1, wherein: the judgment standard of the coated aluminum-plastic composite film in the step (4) is as follows:

a. the surface tension is more than or equal to 38, the longitudinal direction is more than or equal to 38, and the transverse slight shrinkage is qualified;

b. wiping the matte treatment surface of the aluminum-plastic composite film by using ethyl acetate, and determining that the coating is qualified if the coating does not fall off;

c. wiping the matte treatment surface of the aluminum-plastic composite film by alcohol, and determining that the coating is qualified if the coating does not fall off or is not corroded;

and d.38# dyne pen draws a straight line with the length of 10cm in the transverse direction and the longitudinal direction of the aluminum plastic film nylon layer, and the drawn line is not shrunk and does not generate liquid within 5 seconds by visual observation, so that the drawn line is qualified.

6. An aqueous matte coating prepared by the method of any of claims 1-5.

7. The aqueous matte coating of claim 6, wherein: the main components of the water-based matte coating comprise 25-40% of water, 8-15% of acrylic acid and 50-60% of silicon dioxide.

8. The aqueous matte coating of claim 6, wherein: the qualified matte degree of the water-based matte coating is matte degree L ═ 23; a ═ 0.05; b ═ 0.15.

9. The aqueous matte coating of claim 6, wherein: the thickness of the water-based matte coating is 0.5-5.0 mu m.

Technical Field

The invention relates to the field of lithium battery packaging materials, in particular to a preparation method of a water-based matte coating.

Background

At present, the technology of the lithium ion battery is mature day by day, and the lithium ion battery is widely applied to the fields of 3C electronic products, power batteries, energy storage and the like, so that the lithium ion battery packaging material has greater requirements. In the field of lithium battery packaging, there are currently three main packaging methods: cylinder, square and soft pack. The cylindrical and square packages are mainly made of aluminum shells and steel shells, and the soft packages are mainly made of aluminum-plastic films. Among the three ways, the aluminum plastic film soft bag has an increasingly larger market share due to the advantages of light weight, safety and the like. The aluminum plastic film used by the lithium battery is divided into a dry method and a thermal method at present, the structure of the dry method is mostly PA/adhesive/AL/adhesive/CPP, and the structure of the thermal method is mostly PA/adhesive/AL/MPP/CPP. The aluminum-plastic film with the structure is mostly a silver aluminum-plastic film presented by aluminum foil. In 3C products such as mobile phones, the black color of the aluminum plastic film is highly desirable because it gives a luxury feeling.

At present, in the actual use process, one common method is to coat a layer of black matte ink on the outer layer of a polyamide film, but the black matte aluminum-plastic composite film prepared by the method has a grayish feeling in appearance and influences the black appearance; the other method is to coat a layer of black ink on the outer layer of the polyamide film and then coat a layer of matte ink, wherein the matte ink is difficult and uneven to coat.

Disclosure of Invention

In view of the above, in order to solve the problems that the aluminum-plastic composite film has a grayed appearance and is not uniformly coated when the matte layer is coated, the invention provides a preparation method of a water-based matte coating.

The preparation method of the water-based matte coating comprises an aluminum-plastic composite film and the water-based matte coating, wherein the water-based matte coating comprises the main components of 25-40% of water, 8-15% of acrylic acid and 50-60% of silicon dioxide.

Further, the method comprises the following implementation steps:

(1) mixing and stirring water and acrylic acid for 4-6 min;

(2) adding silicon dioxide into the mixture of the stirred water and the acrylic acid, and continuously stirring for 8-12min to uniformly mix the water, the acrylic acid and the silicon dioxide;

(3) coating a mixed solution of water, acrylic acid and silicon dioxide on the surface layer of the aluminum-plastic composite film needing matte treatment;

(4) and curing the coated aluminum-plastic composite film in a curing chamber.

Further, the temperature for mixing and stirring the water, the acrylic acid and the silicon dioxide in the step (1) and the step (2) is 20-30 ℃.

Further, the coating roller used for coating in the step (3) is a 200-mesh plate roller, and the coating times are 2-3.

Further, the curing treatment conditions of the coated aluminum-plastic composite film in the step (4) in a curing chamber are that the temperature is 50-60 ℃, and the curing time is 70-75H.

Further, the coated aluminum-plastic composite film in the step (4) has the following judgment standards:

a. the surface tension is more than or equal to 38, the longitudinal direction is more than or equal to 38, and the transverse slight shrinkage is qualified;

b. wiping the matte treatment surface of the aluminum-plastic composite film by using ethyl acetate, and determining that the coating is qualified if the coating does not fall off;

c. wiping the matte treatment surface of the aluminum-plastic composite film by alcohol, and determining that the coating is qualified if the coating does not fall off or is not corroded;

and d.38# dyne pen draws a straight line with the length of 10cm in the transverse direction and the longitudinal direction of the aluminum plastic film nylon layer, and the drawn line is not shrunk and does not generate liquid within 5 seconds by visual observation, so that the drawn line is qualified.

Further, the qualified matte degree of the water-based matte coating is matte degree L ═ 23; a ═ 0.05; b ═ 0.15.

Further, the thickness of the water-based matte coating is 0.5-5.0 mu m

The invention has the beneficial effects that: the invention provides a preparation method of a water-based matte coating, which is characterized in that a mixed solution of water, acrylic acid and silicon dioxide is coated on the surface layer of an aluminum-plastic composite film needing matte treatment, so that the aluminum-plastic film achieves the matte effect.

Detailed Description

Example 1

The preparation method of the water-based matte coating comprises an aluminum-plastic composite film and the water-based matte coating, wherein the water-based matte coating comprises the main components of 35% of water, 12% of acrylic acid and 53% of silicon dioxide.

Further, the method comprises the following implementation steps:

(5) mixing and stirring water and acrylic acid for 4 min;

(6) adding silicon dioxide into the mixture of the stirred water and the acrylic acid, and continuously stirring for 8 min to uniformly mix the water, the acrylic acid and the silicon dioxide;

(7) coating a mixed solution of water, acrylic acid and silicon dioxide on the surface layer of the aluminum-plastic composite film needing matte treatment;

(8) and curing the coated aluminum-plastic composite film in a curing chamber.

Further, the temperature for mixing and stirring the water, the acrylic acid and the silicon dioxide in the step (1) and the step (2) is 20 ℃.

Further, the coating roll used for the coating in the step (3) is a 200-mesh plate roll, and the number of coating times is 2.

Further, the curing treatment conditions of the coated aluminum-plastic composite film in the step (4) in a curing chamber are that the temperature is 50 ℃ and the curing time is 70H.

Further, the coated aluminum-plastic composite film in the step (4) has the following judgment standards:

a. the surface tension is more than or equal to 38, the longitudinal direction is more than or equal to 38, and the transverse slight shrinkage is qualified;

b. wiping the matte treatment surface of the aluminum-plastic composite film by using ethyl acetate, and determining that the coating is qualified if the coating does not fall off;

c. wiping the matte treatment surface of the aluminum-plastic composite film by alcohol, and determining that the coating is qualified if the coating does not fall off or is not corroded;

and d.38# dyne pen draws a straight line with the length of 10cm in the transverse direction and the longitudinal direction of the aluminum plastic film nylon layer, and the drawn line is not shrunk and does not generate liquid within 5 seconds by visual observation, so that the drawn line is qualified.

Further, the qualified matte degree of the water-based matte coating is matte degree L ═ 23; a ═ 0.05; b ═ 0.15.

Further, the thickness of the water-based matte coating is 0.5-5.0 mu m

Example 2

The preparation method of the water-based matte coating comprises an aluminum-plastic composite film and the water-based matte coating, wherein the water-based matte coating comprises the main components of water, acrylic acid and silicon dioxide, the content proportion of the water is 33%, the content proportion of the acrylic acid is 11%, and the content proportion of the silicon dioxide is 55%.

Further, the method comprises the following implementation steps:

(9) mixing water and acrylic acid, and stirring for 5 min;

(10) adding silicon dioxide into the mixture of the stirred water and the acrylic acid, and continuously stirring for 10min to uniformly mix the water, the acrylic acid and the silicon dioxide;

(11) coating a mixed solution of water, acrylic acid and silicon dioxide on the surface layer of the aluminum-plastic composite film needing matte treatment;

(12) and curing the coated aluminum-plastic composite film in a curing chamber.

Further, the temperature for mixing and stirring the water, the acrylic acid and the silicon dioxide in the step (1) and the step (2) is 25 ℃.

Further, the coating roll used for the coating in the step (3) is a 200-mesh plate roll, and the number of coating times is 2.

Further, the curing treatment conditions of the coated aluminum-plastic composite film in the step (4) in a curing chamber are that the temperature is 55 ℃ and the curing time is 72H.

Further, the coated aluminum-plastic composite film in the step (4) has the following judgment standards:

a. the surface tension is more than or equal to 38, the longitudinal direction is more than or equal to 38, and the transverse slight shrinkage is qualified;

b. wiping the matte treatment surface of the aluminum-plastic composite film by using ethyl acetate, and determining that the coating is qualified if the coating does not fall off;

c. wiping the matte treatment surface of the aluminum-plastic composite film by alcohol, and determining that the coating is qualified if the coating does not fall off or is not corroded;

and d.38# dyne pen draws a straight line with the length of 10cm in the transverse direction and the longitudinal direction of the aluminum plastic film nylon layer, and the drawn line is not shrunk and does not generate liquid within 5 seconds by visual observation, so that the drawn line is qualified.

Further, the qualified matte degree of the water-based matte coating is matte degree L ═ 23; a ═ 0.05; b ═ 0.15.

Further, the thickness of the water-based matte coating is 0.5-5.0 mu m

Example 3

The preparation method of the water-based matte coating comprises an aluminum-plastic composite film and the water-based matte coating, wherein the water-based matte coating comprises the main components of 38% of water, 12% of acrylic acid and 50% of silicon dioxide.

Further, the method comprises the following implementation steps:

(13) mixing water and acrylic acid, and stirring for 6 min;

(14) adding silicon dioxide into the mixture of the stirred water and the acrylic acid, and continuously stirring for 12min to uniformly mix the water, the acrylic acid and the silicon dioxide;

(15) coating a mixed solution of water, acrylic acid and silicon dioxide on the surface layer of the aluminum-plastic composite film needing matte treatment;

(16) and curing the coated aluminum-plastic composite film in a curing chamber.

Further, the temperature for mixing and stirring the water, the acrylic acid and the silicon dioxide in the step (1) and the step (2) is 30 ℃.

Further, the coating roll used for the coating in the step (3) is a 200-mesh plate roll, and the number of coating times is 3.

Further, the curing treatment conditions of the coated aluminum-plastic composite film in the step (4) in a curing chamber are that the temperature is 60 ℃ and the curing time is 75H.

Further, the coated aluminum-plastic composite film in the step (4) has the following judgment standards:

a. the surface tension is more than or equal to 38, the longitudinal direction is more than or equal to 38, and the transverse slight shrinkage is qualified;

b. wiping the matte treatment surface of the aluminum-plastic composite film by using ethyl acetate, and determining that the coating is qualified if the coating does not fall off;

c. wiping the matte treatment surface of the aluminum-plastic composite film by alcohol, and determining that the coating is qualified if the coating does not fall off or is not corroded;

and d.38# dyne pen draws a straight line with the length of 10cm in the transverse direction and the longitudinal direction of the aluminum plastic film nylon layer, and the drawn line is not shrunk and does not generate liquid within 5 seconds by visual observation, so that the drawn line is qualified.

Further, the qualified matte degree of the water-based matte coating is matte degree L ═ 23; a ═ 0.05; b ═ 0.15.

Further, the thickness of the water-based matte coating is 0.5-5.0 mu m

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.