Production method of permanent antistatic base film

Abstract

The invention provides a production method of a permanent antistatic base film, relates to the technical field of antistatic base film processing technologies, and aims to solve the problems that an antistatic agent used in the coating process of an existing antistatic film changes the color of the surface of the film due to the color of the antistatic agent, the light transmittance of the film is reduced, and the service life of the film is prolonged. The surface resistance distribution of the anti-static film obtained after coating is not uniform, the normal use of the product is influenced due to mutual adsorption between films, and a functional coating layer is arranged on one surface of the base film; wherein the functional coating layer is prepared from the following components in parts by weight: 3 parts of water, 2 to 5 parts of isopropanol, 0.8 to 1.5 parts of antistatic agent and 0.008 part of additive, the functional coating layer is prepared from the following components in parts by weight: 3 parts of water, 3 parts of isopropanol, 0.8 part of antistatic agent and 0.008 part of additive, and the antistatic agent is prepared from the following components in percentage by weight: 7 percent of main agent, 0.2 percent of auxiliary agent and 94.2 percent of isopropanol water solution with the volume fraction of 50 percent.

Description

Technical Field

[0001] The present invention relates to the technical field of antistatic base film processing technology, and particularly relates to a production method of a permanent antistatic base film. Background Art

[0002] Antistatic films are mainly used in the field of electronic product protection and can be used as surface protection for electronic screens and optical lenses. Such antistatic films need to use high-performance original films as carriers during production and use. Due to the need to maintain a long-lasting and stable antistatic effect, extremely high quality standards are also required for the original films serving as carriers. Currently, domestic antistatic films mainly face two problems: uneven surface resistance distribution and inability to maintain stability of the antistatic effect after a long time; due to defects in the original film and production process, antistatic films adsorb to each other and cannot be used normally.

[0003] The antistatic agents used in the existing antistatic films during the coating process change the color of the film surface due to the colors they carry themselves, reducing the light transmittance of the film. The surface resistance of the obtained antistatic film after coating is unevenly distributed, and the films will adsorb to each other, which also affects the normal use of the products. Therefore, it is particularly important to design a production method of a permanent antistatic base film to solve the above technical problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art that the antistatic agents used in the existing antistatic films during the coating process change the color of the film surface due to the colors they carry themselves, reducing the light transmittance of the film, the surface resistance of the obtained antistatic film after coating is unevenly distributed, and the films will adsorb to each other, which also affects the normal use of the products, and to propose a production method of a permanent antistatic base film.

[0005] To achieve the above purpose, the present invention adopts the following technical scheme: A permanent antistatic base film includes a base film, and a functional coating layer is provided on one surface of the base film; wherein, the functional coating layer includes 3 parts by weight of water, 2 - 5 parts by weight of isopropanol, 0.8 - 1.5 parts by weight of an antistatic agent, and 0.008 parts by weight of an additive. The functional coating layer includes 3 parts by weight of water, 3 parts by weight of isopropanol, 0.8 parts by weight of an antistatic agent, and 0.008 parts by weight of an additive. The antistatic agent includes 7% of a main agent, 0.2% of an auxiliary agent, and 94.2% of an isopropanol aqueous solution with a volume fraction of 50%.

[0006] Preferably, the functional coating layer includes 3 parts by weight of water, 5 parts by weight of isopropanol, 1.2 parts by weight of an antistatic agent, and 0.008 parts by weight of an additive.

[0007] Preferably, it includes the following steps: Step 1, coating preparation: Mix water and isopropyl alcohol, add an antistatic agent and an additive, stir at 1500 revolutions per minute for 30 minutes, filter through a 400-mesh filter, and use it within 3 hours; Step 2, original film treatment: including corona treatment and dust removal treatment; during the corona treatment, the corona value is greater than 60, and the difference between any two points is ensured not to exceed 4; Step 3, precision coating: the coating traction tension is 260N and the coating tension is 130N; Step 4, drying and curing: the temperatures of the drying ovens in the oven are sequentially set to 90±2°C, 95±2°C, 100±2°C, 110±2°C, 105±2°C, 100±2°C; the total air volume in the oven is 3000m³ / h; Step 5, material receiving and winding: the tension during winding is 240N and the taper is 60%.

[0008] Preferably, the dust removal treatment is carried out by a double-sided dust removal device.

[0009] Preferably, the coating method in Step 3 is reverse coating, and the coating speed is 45m / min.

[0010] Preferably, the cleanliness of the oven in Step 4 is that within each cubic foot, the number of dust particles greater than or equal to 0.5 does not exceed 1000.

[0011] Preferably, the pressure of the laminating roller in Step 5 is M: 0.4MPa / G: 0.4MPa; the pressure of the traction roller is M: 0.2MPa / G: 0.2MPa.

[0012] Compared with the prior art, the advantages and positive effects of the present invention are as follows In the present invention, during use, by using a new type of antistatic agent, the influence on the color of the original film is reduced, thereby maintaining a high light transmittance. The use of the additive enables the antistatic film to maintain a long-term stable antistatic effect. The overall light transmittance is greatly improved, so that the overall antistatic effect of the antistatic film is greatly improved, solving the problems that the antistatic agent used in the existing antistatic film during the coating process changes the color of the film surface due to its own color, reducing the light transmittance of the film, the surface resistance distribution of the obtained antistatic film after coating is uneven, and the films will adsorb each other, which also affects the normal use of the product. Detailed implementation manners

[0013] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0014] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may be practiced in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed in the following specification.

[0015] Example 1 A permanent antistatic base film includes a base film, and a functional coating layer is provided on one surface of the base film. Among them, the functional coating layer includes 3 parts by weight of water, 3 parts by weight of isopropyl alcohol, 0.8 part by weight of an antistatic agent, and 0.008 part by weight of an additive. The base film is selected as LUCKY FP-20, with a coefficient of friction: US 0.282, UD 0.242. The antistatic agent includes 7% of a main agent, 0.2% of an auxiliary agent, and 94.2% of an isopropyl alcohol aqueous solution with a volume fraction of 50%. The main agent is selected as AS-2, and the auxiliary agent is P-795. The production method of the permanent antistatic base film includes the following steps: Step 1, coating preparation: Mix water and isopropyl alcohol, add the antistatic agent and the additive, stir at 1500 revolutions per minute for 30 minutes, filter through a 400-mesh filter, and use within 3 hours; Step 2, original film treatment: including corona treatment and dust removal treatment; during the corona treatment, the corona value is greater than 60, and it is ensured that the difference between any two points does not exceed 4; Step 3, precision coating: The coating traction tension is 260 N, and the coating tension is 130 N; Step 4, drying and curing: The temperatures of the drying ovens in the oven are set in sequence as 90 ± 2 °C, 95 ± 2 °C, 100 ± 2 °C, 110 ± 2 °C, 105 ± 2 °C, 100 ± 2 °C; the total air volume in the oven is 3000 m³ / h; Step 5, receiving and winding: The winding tension is 240 N, and the taper is 60%. The effect achieved by the entire Example 1 is that during use, by using a new antistatic agent, the influence on the color of the original film is reduced, thereby maintaining a high light transmittance. The use of the additive enables the antistatic film to maintain a long-term stable antistatic effect, and the overall light transmittance is greatly improved, making the overall antistatic effect of the antistatic film greatly improved.

[0016] Example 2 A permanent antistatic base film, comprising a base film, on one surface of which a functional coating layer is provided; wherein, the functional coating layer comprises 3 parts by weight of water, 5 parts by weight of isopropyl alcohol, 1.2 parts by weight of an antistatic agent, and 0.008 parts by weight of an additive. The base film is selected as Luckyshore FP-20, with a coefficient of friction: US 0.282, UD 0.242. The antistatic agent comprises 7% of a main agent, 0.2% of an auxiliary agent, and 94.2% of an isopropyl alcohol aqueous solution with a volume fraction of 50%. The main agent is selected as AS-2, and the auxiliary agent is P-795. The production method of the permanent antistatic base film comprises the following steps: Step 1, coating preparation: Mix water and isopropyl alcohol, add the antistatic agent and the additive, stir at 1500 revolutions per minute for 30 minutes, filter through a 400-mesh filter screen, and use within 3 hours; Step 2, original film treatment: including corona treatment and dust removal treatment; when performing corona treatment, the corona value is greater than 60, and the difference between any two points is ensured not to exceed 4; Step 3, precision coating: The coating traction tension is 260 N, and the coating tension is 130 N; Step 4, drying and curing: The temperatures of the drying ovens in the oven are sequentially set as 90±2°C, 95±2°C, 100±2°C, 110±2°C, 105±2°C, 100±2°C; the total air volume in the oven is 3000 m³ / h; Step 5, material receiving and winding: The winding tension is 240 N, and the taper is 60%. The effect achieved by the entire Example 2 is that during use, by using a new antistatic agent, the influence on the color of the original film is reduced, thereby maintaining a high light transmittance. The use of the additive enables the antistatic film to maintain a long-term stable antistatic effect, and the overall light transmittance is greatly improved, making the overall antistatic effect of the antistatic film greatly improved.

[0017] The experimental data of two groups of examples are as follows in the table: Project Ordinary PET anti-static film PET anti-static film of this embodiment Thickness 100um ± 2um 100um ± lum Thickness tolerance 3um 1.6um Transmittance Above 85% Above 92% Haze No requirement Below 3.0 Cleanliness No requirement Diameter Rainbow pattern No requirement Invisible Deformation Slight deformation is acceptable No obvious deformation phenomenon (such as stripe shape, wavy shape or other shapes) is allowed. Folding damage, bumping damage, indentation, wrinkle, stain, unevenness, breakage Not allowed Not allowed Dot-like foreign matters (including transparent and non-transparent) Per square meter: a: D ≤ 0.15, no requirement for b: D > 0.15mm, 5 points are allowed, and the point distance > 40mm Per square meter: a: D ≤ 0.15, 5 points are allowed, and the point distance > 40mm; b: D > 0.15mm, NG. Linear foreign matters, scratches Per square meter: W ≤ 0.05, L ≤ 5mm, the distance between the line and the key needs to be > 40mm, no requirement for W > 0.05mm or L > 5mm, 5 are allowed Per square meter: W ≤ 0.05, L ≤ 5mm, the distance between the line and the key needs to be > 40mm, 5 strips are allowed; W > 0.05mm or L > 5mm, NG. pcs Stains, lint No blocky stains are allowed, and there should be no cutting lint dirt and cutting liquid at the edge. No blocky stains are allowed, and there should be no cutting lint dirt and cutting liquid at the edge. Surface resistance <![CDATA[10² - 10¹ 0 Q]]> 10²Q Surface resistance after repeated wiping with isopropanol <![CDATA[10 9 -10²Q]]> 10°Q Between films There is an adsorption phenomenon Do not adsorb As can be seen from the above table, the antistatic film with an anti-adsorption effect produced in Examples 1-2 has a light transmittance of more than 90%, a haze of less than 3.0, a uniform surface resistance distribution with a resistance value of 107 Q, and can maintain a long-term stable antistatic effect; under a magnifying glass of 100 times, there are no visible particles or foreign matters, the film surface is flat, without longitudinal stripes, water ripples, transverse stripes, and no obvious rainbow stripes; there is no adsorption phenomenon between films.

Claims

1. A permanent antistatic base film, comprising a base film, characterized in that, One surface of the base film is provided with a functional coating layer; wherein, the functional coating layer comprises, by weight, 3 parts of water, 2 - 5 parts of isopropanol, 0.8 - 1.5 parts of antistatic agent, and 0.008 parts of additive. The functional coating layer comprises, by weight, 3 parts of water, 3 parts of isopropanol, 0.8 parts of antistatic agent, and 0.008 parts of additive. The antistatic agent comprises, by weight percentage, 7% of main agent, 0.2% of auxiliary agent, and 94.2% of isopropanol aqueous solution with a volume fraction of 50%.

2. The permanent antistatic base film according to claim 1, characterized in that, The functional coating layer comprises, by weight, 3 parts of water, 5 parts of isopropanol, 1.2 parts of antistatic agent, and 0.008 parts of additive.

3. The production method of a permanent antistatic base film according to claim 1, characterized in that It includes the following steps: Step 1, coating preparation: Mix water and isopropanol, add antistatic agent and additive, stir at 1500 revolutions per minute for 30 minutes, filter through a 400 - mesh filter, and use within 3 hours; Step 2, original film treatment: including corona treatment and dust removal treatment; during the corona treatment, the corona value is greater than 60, and the difference between any two points is ensured not to exceed 4; Step 3, precision coating: the coating traction tension is 260N, and the coating tension is 130N; Step 4, drying and curing: the temperatures of the ovens in the drying oven are set successively as 90±2℃, 95±2℃, 100±2℃, 110±2℃, 105±2℃, 100±2℃; the total air volume in the drying oven is 3000m³ / h; Step 5, material receiving and winding: the winding tension is 240N, and the taper is 60%.

4. The production method of a permanent antistatic base film according to claim 3, characterized in that, The dust removal treatment is carried out by a double - sided dust removal device.

5. The production method of a permanent antistatic base film according to claim 1, characterized in that In Step 3, the coating method is reverse coating, and the coating speed is 45m / min.

6. The production method of a permanent antistatic base film according to claim 1, characterized in that, In Step 4, the cleanliness of the drying oven is that the number of dust particles larger than or equal to 0.5 per cubic foot does not exceed 1000.

7. The production method of a permanent antistatic base film according to claim 1, characterized in that In Step 5, the pressure of the laminating roller is M: 0.4MPa / G: 0.4MPa; the pressure of the traction roller is M: 0.2MPa / G: 0.2MPa.