CN114644892A - Anti-blue-light anti-ultraviolet pressure-sensitive adhesive, coating, protective film applying coating and preparation method - Google Patents

Abstract

The invention discloses a blue-light-proof ultraviolet-resistant pressure-sensitive adhesive, a coating, a protective film applying the same and a preparation method, wherein the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive comprises the following components in percentage by mass: 20-60% of butyl acrylate, 10-30% of acrylic acid-2-ethyl hexyl ester, 10-20% of vinyl acetate, 1-3% of glyceryl methacrylate, 1-10% of acrylic acid, 0.1-2% of benzoyl peroxide, 0.5-10% of ultraviolet screening agent, 0.1-2% of blue light absorbent, 7-40% of toluene, 7-40% of ethyl acetate, 1-5% of tackifier and 0.1-5% of blue nano color paste. The anti-blue-light anti-ultraviolet pressure-sensitive adhesive is made into an anti-blue-light anti-ultraviolet light pale green optical adhesive coating, a pale blue coating and a pale gray blue coating, and the coating is matched with other film layers to prepare the screen protective film of an electronic product.

Description

Anti-blue-light anti-ultraviolet pressure-sensitive adhesive, coating, protective film applying coating and preparation method

Technical Field

The invention belongs to the technical field of screen protective films, and particularly relates to a blue light-proof and ultraviolet-proof pressure-sensitive adhesive, an optical adhesive coating prepared from the pressure-sensitive adhesive, a protective film prepared from the optical adhesive coating, and a preparation method of the protective film.

Background

With the popularization of electronic products such as mobile phones and computers, the time for which the eyes of teenagers and children contact the screen is longer and longer, and high-energy blue light emitted from a screen display causes retinal pigment epithelial cell decay, so that the eyesight is damaged. Therefore, it would be beneficial to protect the eyes of teenagers and children if some of the uv and blue light emitted from the screens of these products were filtered.

At present, two blue light prevention protective films are provided, one is a blue light prevention optical base film formed by melt extrusion or calendaring, although the ultraviolet absorptivity of the blue light prevention protective film can reach more than 99%, the process is complex, the cost is high, the transparency is low, the appearance color is yellow, and the color saturation of a display screen is seriously influenced; the other blue light prevention protective film is made by coating a blue light prevention and ultraviolet ray prevention coating on a base film, and although the process is simple, the appearance of the blue light prevention protective film is yellow, which seriously affects the vision of a user.

Disclosure of Invention

In view of the above, the main objective of the present invention is to provide a pressure-sensitive adhesive with blue light-shielding and ultraviolet-resisting effects, which solves the problem of poor blue light-shielding and ultraviolet-resisting effects of the protective film in the prior art.

The invention also aims to provide an optical adhesive coating applying the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive;

the third purpose of the invention is to provide a blue-light-proof ultraviolet-resistant protective film, which can be light green, light blue and light gray blue in appearance;

the fourth purpose of the invention is to provide a preparation method of the blue-light-proof and ultraviolet-resistant protective film.

In order to achieve the purpose, the technical scheme of the invention is realized as follows: the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive comprises the following components in percentage by mass:

20-60% of butyl acrylate, 10-30% of acrylic acid-2-ethyl hexyl ester, 10-20% of vinyl acetate, 1-3% of glyceryl methacrylate, 1-10% of acrylic acid, 0.1-2% of benzoyl peroxide, 0.5-10% of ultraviolet screening agent, 0.1-2% of blue light absorbent, 7-40% of toluene, 7-40% of ethyl acetate, 1-5% of tackifier and 0.1-5% of blue nano color paste.

Preferably, in order to prepare a light green protective film by using the pressure-sensitive adhesive, the pressure-sensitive adhesive further comprises the following components in percentage by mass: 0.01-0.8% of yellow nano color paste.

Preferably, in order to prepare a light blue protective film by using the pressure-sensitive adhesive, the pressure-sensitive adhesive further comprises the following components in percentage by mass: 0.05 to 0.5 percent of orange nano color paste and 0.01 to 0.8 percent of red nano color paste.

Preferably, in order to prepare a grayish blue protective film by using the pressure-sensitive adhesive, the pressure-sensitive adhesive further comprises the following components in percentage by mass: 0.01 to 0.8 percent of black nano color paste.

Preferably, the ultraviolet screening agent is at least one of phenyl salicylate, ultraviolet absorbent UV-0, ultraviolet absorbent UV-P, ultraviolet absorbent UV-9, ultraviolet absorbent UV-321, ultraviolet absorbent UV-531 and ultraviolet absorbent RMB.

Preferably, the blue light absorber is at least one of yellow color concentrate, yellow fluorescent powder, nano zinc oxide, nano cerium oxide and nano microcrystal consisting of SiO2, CdS and PbS; yellow tints and CdS compositions are preferred.

Preferably, the blue nanometer color paste, the yellow nanometer color paste, the orange nanometer color paste, the red nanometer color paste and the black nanometer color paste are all inorganic nanometer dyes.

The second technical scheme of the invention is realized as follows: the blue-light-proof and ultraviolet-resistant optical adhesive coating is used for a blue-light-proof and ultraviolet-resistant protective film and is made of the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive.

The third technical scheme of the invention is realized as follows: a blue-light-proof ultraviolet-resistant protective film comprises a substrate layer, a silicon release film layer, the blue-light-proof ultraviolet-resistant optical adhesive coating, a silica gel coating and the release film layer; silicon is from type rete, prevents blue light ultraviolet resistance optical coating from outer to interior pile up in proper order and set up on the surface of substrate layer, the silica gel coating with set up on another surface of substrate layer from type rete, just the silica gel coating is located the substrate layer and is from type between the rete.

Preferably, the thickness of the substrate layer is 36-150 μm, the thickness of the blue-light-proof ultraviolet-resistant optical adhesive coating is 25-200 μm, and the thickness of the silica gel coating is 20-50 μm; the thickness of the silicon release film layer is 30-70 mu m; the thickness of the release film layer is 30-70 mu m; the thickness of the using layer of the blue-light-proof and ultraviolet-resistant protective film is 120-180 mu m.

Preferably, the silicone gel coating is made of silicone pressure sensitive adhesive; the release film layer is a PET base film.

Preferably, the substrate layer is made of one of a PET film, a PC film, a TPU film, a TPH film or a PMMA film.

The fourth technical scheme of the invention is realized as follows: a preparation method of the blue-light-proof and ultraviolet-resistant protective film comprises the following steps:

s1, selecting a substrate layer with the thickness of 36-150 mu m for later use;

s2, coating the prepared organic silicon pressure-sensitive adhesive on one surface of the substrate layer in a slit coating mode, heating, drying and curing to form a silica gel coating, and obtaining a first mixed substrate;

s3, attaching a release film to the surface of the silica gel coating of the first mixed base material obtained in the step S2 to form a release film layer, and obtaining a second mixed base material;

s4, coating the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive on the other surface of the substrate layer in a slit coating mode, heating, drying and curing to form a blue-light-proof ultraviolet-resistant optical adhesive coating, and obtaining a third mixed substrate;

s5, attaching a silicon release film layer on the surface of the blue-light-proof ultraviolet-resistant optical adhesive coating far away from the base material layer to obtain the blue-light-proof ultraviolet-resistant protective film.

Compared with the prior art, the blue-light-proof and ultraviolet-resistant optical adhesive coating is prepared by adopting the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive provided by the invention, and the screen protective film of an electronic product is prepared by adopting the coating and other film layers to be matched, so that when the protective film is used, the blue light from a display screen can be filtered, the blue-light-proof rate and the ultraviolet-resistant effect are improved, and the influence of the color of a blue light absorbent on the color saturation of the screen can be effectively avoided; in addition, the protective film disclosed by the invention not only has multiple colors of light green, light blue and light gray blue, but also integrates the double functions of blue light prevention and ultraviolet resistance, so that the performance and the quality of the protective film are effectively improved.

In addition, the protective film prepared by the preparation method has the advantages of low cost, high transmittance and good effects of blue light prevention and ultraviolet resistance, and the appearance color is light green, light blue and light grey blue, so that the color saturation of the display screen is not influenced, the screen light is soft, the eye fatigue is prevented, and the problems that the color saturation of the display screen and the visual aesthetic feeling of a user are seriously influenced due to the yellow appearance phenomenon of a blue light absorbent added in the existing blue light prevention protective film process are effectively solved.

In addition, the blue-light-proof ultraviolet-resistant protective film provided by the invention is low in cost, strong in product competitiveness and good in practicability, and is worthy of being widely popularized and used.

Drawings

Fig. 1 is a schematic view of the layered structure of the blue-light-blocking and uv-blocking protective films obtained in examples 1 to 6 of the present invention.

In the figure, 1 is a substrate layer, 2 is a silicon release film layer, 3 is a blue-light-proof ultraviolet-resistant optical adhesive coating layer, 4 is a silica gel coating layer, and 5 is a release film layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not mean that the device or member to which the present invention is directed must have a specific orientation or position, and thus, cannot be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The blue-light-proof ultraviolet-resistant protective film provided by the embodiment of the invention is shown in fig. 1 and comprises a substrate layer 1, a silicon release film layer 2, a blue-light-proof ultraviolet-resistant optical adhesive coating layer 3, a silica gel coating layer 4 and a release film layer 5; silicon is from type rete 2, prevents that blue light anti ultraviolet optical cement coating 3 from stacking up in proper order from outer to interior and sets up on a surface of substrate layer 1, silica gel coating 4 with set up on another surface of substrate layer 1 from type rete 5, just silica gel coating 4 is located substrate layer 1 and from type between the rete 5.

Wherein the thickness of the substrate layer 1 is 36-150 μm, preferably 50 μm; the thickness of the blue-light-proof ultraviolet-resistant optical adhesive coating 3 is 25-200 mu m, and preferably 42 mu m; the thickness of the silicon release film layer 2 is 30-70 μm, preferably 50 μm; the thickness of the silica gel coating 4 is 20-50 μm, preferably 28 μm; the thickness of the release film layer 5 is 30-70 μm, preferably 50 μm; the thickness of the blue-light-proof and ultraviolet-proof protective film is 120-180 mu m, preferably 120 mu m.

Further, the silica gel coating 4 is made of organic silicon pressure-sensitive adhesive, and the release film layer 5 is a PET base film; the substrate layer 1 is made of one of a PET film, a PC film, a TPU film, a TPH film or a PMMA film.

The embodiment of the invention also provides a preparation method of the blue-light-proof ultraviolet-resistant protective film, which is realized by the following steps:

s1, selecting a substrate layer with the thickness of 36-150 mu m for later use;

s2, coating the prepared organic silicon pressure-sensitive adhesive on one surface of the substrate layer 1 in a slit coating mode, heating, drying and curing to form a silica gel coating 4, and obtaining a first mixed substrate;

s3, attaching a release film to the surface of the silica gel coating of the first mixed base material obtained in the step S2 to form a release film layer 5, and obtaining a second mixed base material;

s4, coating the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive on the other surface of the substrate layer 1 in a slit coating mode, heating, drying and curing to form a blue-light-proof ultraviolet-resistant optical adhesive coating 3, and obtaining a third mixed substrate;

s5, attaching a silicon release film layer 2 to the surface, far away from the substrate layer 1, of the blue-light-proof and ultraviolet-resistant optical adhesive coating layer 3 to obtain the blue-light-proof and ultraviolet-resistant protective film.

The substrate layer 1 in the S1 is made of one of a PET film, a PC film, a TPU film, a TPH film, or a PMMA film;

in the above S2, the silicone pressure sensitive adhesive includes a silicone resin, an MQ resin regulator, a tackifier, a crosslinking agent, a platinum catalyst, an inhibitor, and a leveling agent; the organic silicon pressure-sensitive adhesive comprises the following components in percentage by mass:

the organic silicon resin is polydimethylsiloxane, accounting for 30 percent; MQ silicone resin accounting for 30 percent; 2% of tackifier; 0.2% of cross-linking agent; platinum catalyst, accounting for 1.5%; inhibitor, accounting for 0.1%; 0.5% of leveling agent; toluene, 15.7%; ethyl acetate, accounting for 20%;

the specific method of S2 is as follows: the organic silicon pressure-sensitive adhesive liquid is conveyed by a gear pump, and the organic silicon pressure-sensitive adhesive is coated on the substrate layer 1 in a slit coating mode.

In addition, the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive in the S4 comprises the following components in percentage by mass:

20-60% of butyl acrylate, 10-30% of acrylic acid-2-ethyl hexyl ester, 10-20% of vinyl acetate, 1-3% of glyceryl methacrylate, 1-10% of acrylic acid, 0.1-2% of benzoyl peroxide, 0.5-10% of ultraviolet screening agent, 0.1-2% of blue light absorbent, 7-40% of toluene, 7-40% of ethyl acetate, 1-5% of tackifier and 0.1-5% of blue nano color paste. In the step, a gear pump is adopted to convey the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive liquid.

The ultraviolet screening agent is at least one of phenyl salicylate, ultraviolet absorbent UV-0, ultraviolet absorbent UV-P, ultraviolet absorbent UV-9, ultraviolet absorbent UV-321, ultraviolet absorbent UV-531 and ultraviolet absorbent RMB; the blue light absorber is at least one of yellow color concentrate, yellow fluorescent powder, nano zinc oxide, nano cerium oxide and nano microcrystal consisting of SiO2, CdS and PbS; the blue nanometer color paste, the yellow nanometer color paste, the red nanometer color paste and the black nanometer color paste are all inorganic nanometer dyes.

The blue nanometer color paste, the yellow nanometer color paste, the red nanometer color paste, the black nanometer color paste and the orange nanometer color paste are used for color mixing of nanometer dyes, and the aim is to cover yellow brought by a blue light absorbent, lighten and lighten the color, reduce the influence of the yellow on vision and improve the visual saturation. Generally, the combination of more than two kinds of colored color pastes is adopted, for example, the light green pressure sensitive adhesive of the invention adopts the combination of blue nanometer color paste and yellow nanometer color paste; the light blue pressure-sensitive adhesive adopts the combination of blue nanometer color paste, orange nanometer color paste and red nanometer color paste; the light gray blue pressure-sensitive adhesive adopts the combination of blue nanometer color paste, orange nanometer color paste, red nanometer color paste and black nanometer color paste.

By adopting the preparation method of the protective film, the protective film has the functions of low cost, high transmittance and good blue light and ultraviolet resistance effects, and the appearance color is light green, light blue or light gray blue, so that the color saturation of the display screen is not influenced, the screen light is soft, and the eye fatigue is prevented.

The blue-light-proof ultraviolet-resistant optical adhesive coating 3 can be prepared by adopting the thermosetting pressure-sensitive adhesive and can also be prepared by adopting the photo-curing pressure-sensitive adhesive.

The following are specific examples:

example 1

The light green blue-light-proof ultraviolet-resistant protective film provided by the embodiment 1 of the invention is prepared by the following method:

s1, selecting a PET film with the thickness of 50 mu m as a base material layer 1 for later use;

s2, coating the prepared organic silicon pressure-sensitive adhesive on one surface of the substrate layer 1 in a slit coating mode, heating, drying and curing to form a silica gel coating 4, and obtaining a first mixed substrate;

the organic silicon pressure-sensitive adhesive comprises the following components in percentage by mass:

the organic silicon resin is polydimethylsiloxane, accounting for 30 percent; MQ silicone resin accounting for 30%; 2% of tackifier; 0.2% of cross-linking agent; platinum catalyst, accounting for 1.5%; inhibitor, accounting for 0.1%; 0.5% of leveling agent; toluene, 15.7%; ethyl acetate, accounting for 20%;

after the organic silicon pressure-sensitive adhesive is blended, vacuum defoaming is carried out for 45 minutes, in the step, the gear pump rotating speed is 15 revolutions per minute, the feeding speed is 18 meters per minute, after coating is finished, the organic silicon pressure-sensitive adhesive enters an oven to be heated and cured, the oven is divided into seven sections, the temperature of each section is 80 ℃, 100 ℃, 120 ℃, 140 ℃, 150 ℃, 130 ℃, and 4 meters, the length of each section of the oven is 4 meters, and a silica gel coating with the thickness of 28 micrometers is formed on the substrate layer 1 after the organic silicon pressure-sensitive adhesive is taken out of the oven;

s3, attaching a release film to the surface of the silica gel coating of the first mixed base material obtained in the step S2 to form a release film layer 5 with the thickness of 50 microns, and obtaining a second mixed base material;

s4, coating the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive on the other surface of the substrate layer 1 in a slit coating mode, heating, drying and curing to form a blue-light-proof ultraviolet-resistant optical adhesive coating 3, and obtaining a third mixed substrate;

the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive comprises the following components in percentage by mass:

35 percent of butyl acrylate, 15 percent of acrylic acid-2-ethyl hexyl ester, 10 percent of vinyl acetate, 3 percent of methacrylic acid glyceride, 5 percent of acrylic acid, 1 percent of benzoyl peroxide, 2 percent of ultraviolet screening agent, 1 percent of blue light absorbent, 16.25 percent of toluene, 10 percent of ethyl acetate, 1 percent of tackifier, 0.5 percent of blue nano color paste and 0.25 percent of yellow nano color paste;

after the blue-light-resistant and ultraviolet-resistant pressure-sensitive adhesive is blended, vacuum defoaming is carried out for 45 minutes, in the step, the gear pump rotating speed is 18 revolutions per minute, the feeding speed is 18 meters per minute, after coating is finished, the blue-light-resistant and ultraviolet-resistant pressure-sensitive adhesive enters an oven to be heated, dried and cured, the oven is divided into seven sections, the temperature of each section is 80 ℃, 100 ℃, 120 ℃, 140 ℃, 130 ℃, 120 ℃, 100 ℃, and the length of each section of the oven is 4 meters, and after the blue-light-resistant and ultraviolet-resistant pressure-sensitive adhesive is taken out of the oven, a blue-light-resistant and ultraviolet-resistant optical adhesive coating with the thickness of 42 micrometers is formed on the substrate layer 1;

s5, attaching a silicon release film layer 2 with the thickness of 50 microns to the surface, far away from the substrate layer 1, of the blue-light-proof ultraviolet-resistant optical adhesive coating layer 3 to obtain a blue-light-proof ultraviolet-resistant protective film with the thickness of 120 microns. The use layer refers to the remaining parts of the blue-light-proof and ultraviolet-resistant protective film after the silicon release film layer 2 and the release film layer 5 are peeled off, and the thickness of the use layer refers to the total thickness of the substrate layer 1, the silica gel coating layer 4 and the blue-light-proof and ultraviolet-resistant optical adhesive coating layer 3.

Example 2

The light green blue-light-proof ultraviolet-resistant protective film provided by the embodiment 2 of the invention is prepared by the following method:

s1, selecting a PET film with the thickness of 50 mu m as a base material layer 1 for later use;

s2, coating the prepared organic silicon pressure-sensitive adhesive on one surface of the substrate layer 1 in a slit coating mode, heating, drying and curing to form a silica gel coating 4, and obtaining a first mixed substrate;

the organic silicon pressure-sensitive adhesive comprises the following components in percentage by mass:

the organic silicon resin is polydimethylsiloxane, accounting for 30 percent; MQ silicone resin accounting for 30%; 2% of tackifier; 0.2% of cross-linking agent; platinum catalyst, accounting for 1.5%; inhibitor, accounting for 0.1%; 0.5% of leveling agent; toluene, 15.7%; ethyl acetate, accounting for 20%;

after the organic silicon pressure-sensitive adhesive is blended, vacuum defoaming is carried out for 45 minutes, in the step, the gear pump rotating speed is 15 revolutions per minute, the feeding speed is 18 meters per minute, after coating is finished, the organic silicon pressure-sensitive adhesive enters an oven to be heated, dried and cured, the oven is divided into seven sections, the temperature of each section is 80 ℃, 100 ℃, 120 ℃, 140 ℃, 150 ℃, 130 ℃, and 4 meters, and after the organic silicon pressure-sensitive adhesive is taken out of the oven, a silica gel coating with the thickness of 28 micrometers is formed on the substrate layer 1;

s3, attaching a release film to the surface of the silica gel coating of the first mixed base material obtained in the step S2 to form a release film layer 5 with the thickness of 50 microns, and obtaining a second mixed base material;

s4, coating the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive on the other surface of the substrate layer 1 in a slit coating mode, heating, drying and curing to form a blue-light-proof and ultraviolet-resistant optical adhesive coating 3 with the thickness of 102 mu m, and obtaining a third mixed substrate;

the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive comprises the following components in percentage by mass:

35 percent of butyl acrylate, 15 percent of acrylic acid-2-ethyl hexyl ester, 10 percent of vinyl acetate, 3 percent of methacrylic acid glyceride, 5 percent of acrylic acid, 1 percent of benzoyl peroxide, 2 percent of ultraviolet screening agent, 1 percent of blue light absorbent, 16.25 percent of toluene, 10 percent of ethyl acetate, 1 percent of tackifier, 0.5 percent of blue nano color paste and 0.25 percent of yellow nano color paste;

after the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive is prepared, vacuum defoaming is carried out for 45 minutes, in the step, the gear pump rotating speed is 18 revolutions per minute, the feeding speed is 18 meters per minute, after coating is finished, the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive enters an oven to be heated, dried and cured, the oven is divided into seven sections, the temperature of each section is 80 ℃, 100 ℃, 120 ℃, 140 ℃, 130 ℃, 120 ℃, 100 ℃, and the length of each section of the oven is 4 meters, and after the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive is taken out of the oven, a blue-light-proof and ultraviolet-resistant optical adhesive coating with the thickness of 102 micrometers is formed on the substrate layer 1;

s5, attaching a silicon release film layer 2 with the thickness of 50 micrometers to the surface, far away from the substrate layer 1, of the blue-light-proof and ultraviolet-resistant optical adhesive coating 3 to obtain a blue-light-proof and ultraviolet-resistant protective film with the thickness of 180 micrometers.

Example 3

The light blue anti-ultraviolet protective film provided by the embodiment 3 of the invention is prepared by the following method:

s1, selecting a PET film with the thickness of 50 mu m as a base material layer 1 for later use;

s2, coating the prepared organic silicon pressure-sensitive adhesive on one surface of the substrate layer 1 in a slit coating mode, heating, drying and curing to form a silica gel coating 4, and obtaining a first mixed substrate;

the organic silicon pressure-sensitive adhesive comprises the following components in percentage by mass:

the organic silicon resin is polydimethylsiloxane, accounting for 30 percent; MQ silicone resin accounting for 30%; 2% of tackifier; 0.2% of cross-linking agent; platinum catalyst, accounting for 1.5%; inhibitor, accounting for 0.1%; 0.5% of leveling agent; toluene, 15.7%; ethyl acetate, accounting for 20%;

after the organic silicon pressure-sensitive adhesive is blended, vacuum defoaming is carried out for 45 minutes, in the step, the gear pump rotating speed is 15 revolutions per minute, the feeding speed is 18 meters per minute, after coating is finished, the organic silicon pressure-sensitive adhesive enters an oven to be heated, dried and cured, the oven is divided into seven sections, the temperature of each section is 80 ℃, 100 ℃, 120 ℃, 140 ℃, 150 ℃, 130 ℃, and 4 meters, and after the organic silicon pressure-sensitive adhesive is taken out of the oven, a silica gel coating with the thickness of 28 micrometers is formed on the substrate layer 1;

s3, attaching a release film to the surface of the silica gel coating of the first mixed base material obtained in the step S2 to form a release film layer 5 with the thickness of 50 microns, and obtaining a second mixed base material;

s4, coating the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive on the other surface of the substrate layer 1 in a slit coating mode, heating, drying and curing to form a blue-light-proof and ultraviolet-resistant optical adhesive coating 3 with the thickness of 42 mu m, and obtaining a third mixed substrate;

the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive comprises the following components in percentage by mass:

35 percent of butyl acrylate, 15 percent of acrylic acid-2-ethyl hexyl ester, 10 percent of vinyl acetate, 3 percent of methacrylic glyceride, 5 percent of acrylic acid, 1 percent of benzoyl peroxide, 2 percent of ultraviolet screening agent, 1 percent of blue light absorber, 16.35 percent of toluene, 10 percent of ethyl acetate, 1 percent of tackifier, 0.5 percent of blue nanometer color paste, 0.05 percent of red nanometer color paste and 0.1 percent of orange nanometer color paste;

after the blue-light-resistant and ultraviolet-resistant pressure-sensitive adhesive is blended, vacuum defoaming is carried out for 45 minutes, in the step, the gear pump rotating speed is 18 revolutions per minute, the feeding speed is 18 meters per minute, after coating is finished, the blue-light-resistant and ultraviolet-resistant pressure-sensitive adhesive enters an oven to be heated, dried and cured, the oven is divided into seven sections, the temperature of each section is 80 ℃, 100 ℃, 120 ℃, 140 ℃, 130 ℃, 120 ℃, 100 ℃, and the length of each section of the oven is 4 meters, and after the blue-light-resistant and ultraviolet-resistant pressure-sensitive adhesive is taken out of the oven, a blue-light-resistant and ultraviolet-resistant optical adhesive coating with the thickness of 42 micrometers is formed on the substrate layer 1;

s5, attaching a silicon release film layer 2 with the thickness of 50 microns to the surface, far away from the substrate layer 1, of the blue-light-proof ultraviolet-resistant optical adhesive coating layer 3 to obtain a blue-light-proof ultraviolet-resistant protective film with the thickness of 120 microns.

Example 4

The light blue anti-ultraviolet protective film provided by the embodiment 4 of the invention is prepared by the following method:

s1, selecting a PET film with the thickness of 50 mu m as a base material layer 1 for later use;

s2, coating the prepared organic silicon pressure-sensitive adhesive on one surface of the base material layer 1 in a slit coating mode, heating, drying and curing to form a silica gel coating 4, and obtaining a first mixed base material;

the organic silicon pressure-sensitive adhesive comprises the following components in percentage by mass:

the organic silicon resin is polydimethylsiloxane, accounting for 30 percent; MQ silicone resin accounting for 30%; 2% of tackifier; 0.2% of cross-linking agent; platinum catalyst, accounting for 1.5%; inhibitor, accounting for 0.1%; 0.5% of leveling agent; toluene, 15.7%; ethyl acetate, accounting for 20%;

after the organic silicon pressure-sensitive adhesive is blended, vacuum defoaming is carried out for 45 minutes, in the step, the gear pump rotating speed is 15 revolutions per minute, the feeding speed is 18 meters per minute, after coating is finished, the organic silicon pressure-sensitive adhesive enters an oven to be heated, dried and cured, the oven is divided into seven sections, the temperature of each section is 80 ℃, 100 ℃, 120 ℃, 140 ℃, 150 ℃, 130 ℃, and 4 meters, and after the organic silicon pressure-sensitive adhesive is taken out of the oven, a silica gel coating with the thickness of 28 micrometers is formed on the substrate layer 1;

s3, attaching a release film to the surface of the silica gel coating of the first mixed base material obtained in the step S2 to form a release film layer 5 with the thickness of 50 microns, and obtaining a second mixed base material;

s4, coating the other surface of the substrate layer 1 with a blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive in a slit coating manner, heating, drying and curing to form a blue-light-proof and ultraviolet-resistant optical adhesive coating 3 with the thickness of 102 mu m, and obtaining a third mixed substrate;

the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive comprises the following components in percentage by mass:

35 percent of butyl acrylate, 15 percent of acrylic acid-2-ethyl hexyl ester, 10 percent of vinyl acetate, 3 percent of methacrylic glyceride, 5 percent of acrylic acid, 1 percent of benzoyl peroxide, 2 percent of ultraviolet screening agent, 1 percent of blue light absorber, 16.35 percent of toluene, 10 percent of ethyl acetate, 1 percent of tackifier, 0.5 percent of blue nanometer color paste, 0.05 percent of red nanometer color paste and 0.1 percent of orange nanometer color paste;

after the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive is prepared, vacuum defoaming is carried out for 45 minutes, in the step, the gear pump rotating speed is 18 revolutions per minute, the feeding speed is 18 meters per minute, after coating is finished, the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive enters an oven to be heated, dried and cured, the oven is divided into seven sections, the temperature of each section is 80 ℃, 100 ℃, 120 ℃, 140 ℃, 130 ℃, 120 ℃, 100 ℃, and the length of each section of the oven is 4 meters, and after the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive is taken out of the oven, a blue-light-proof and ultraviolet-resistant optical adhesive coating with the thickness of 102 micrometers is formed on the substrate layer 1;

s5, attaching a silicon release film layer 2 with the thickness of 50 microns to the surface, far away from the substrate layer 1, of the blue-light-proof ultraviolet-resistant optical adhesive coating layer 3 to obtain a blue-light-proof ultraviolet-resistant protective film with the thickness of 180 microns.

Example 5

The light grey blue anti-ultraviolet protection film provided by the embodiment 5 of the invention is prepared by the following method:

s1, selecting a PET film with the thickness of 50 mu m as a base material layer 1 for later use;

s2, coating the prepared organic silicon pressure-sensitive adhesive on one surface of the substrate layer 1 in a slit coating mode, heating, drying and curing to form a silica gel coating 4, and obtaining a first mixed substrate;

the organic silicon pressure-sensitive adhesive comprises the following components in percentage by mass:

the organic silicon resin is polydimethylsiloxane, accounting for 30 percent; MQ silicone resin accounting for 30%; 2% of tackifier; 0.2% of cross-linking agent; platinum catalyst, accounting for 1.5%; inhibitor, accounting for 0.1%; 0.5% of leveling agent; 15.7 percent of toluene; ethyl acetate, accounting for 20%;

after the organic silicon pressure-sensitive adhesive is blended, vacuum defoaming is carried out for 45 minutes, in the step, the gear pump rotating speed is 15 revolutions per minute, the feeding speed is 18 meters per minute, after coating is finished, the organic silicon pressure-sensitive adhesive enters an oven to be heated, dried and cured, the oven is divided into seven sections, the temperature of each section is 80 ℃, 100 ℃, 120 ℃, 140 ℃, 150 ℃, 130 ℃, and 4 meters, and after the organic silicon pressure-sensitive adhesive is taken out of the oven, a silica gel coating with the thickness of 28 micrometers is formed on the substrate layer 1;

s3, attaching a release film to the surface of the silica gel coating of the first mixed base material obtained in the step S2 to form a release film layer 5 with the thickness of 50 microns, and obtaining a second mixed base material;

s4, coating the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive on the other surface of the substrate layer 1 in a slit coating mode, heating, drying and curing to form a blue-light-proof and ultraviolet-resistant optical adhesive coating 3 with the thickness of 42 mu m, and obtaining a third mixed substrate;

the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive comprises the following components in percentage by mass:

35 percent of butyl acrylate, 15 percent of acrylic acid-2-ethyl hexyl ester, 10 percent of vinyl acetate, 3 percent of methacrylic acid glyceride, 5 percent of acrylic acid, 1 percent of benzoyl peroxide, 2 percent of ultraviolet screening agent, 1 percent of blue light absorber, 16.2 percent of toluene, 10 percent of ethyl acetate, 1 percent of tackifier, 0.5 percent of blue nano color paste, 0.05 percent of red nano color paste, 0.1 percent of orange nano color paste and 0.05 percent of black nano color paste;

after the blue-light-resistant and ultraviolet-resistant pressure-sensitive adhesive is blended, vacuum defoaming is carried out for 45 minutes, in the step, the gear pump rotating speed is 18 revolutions per minute, the feeding speed is 18 meters per minute, after coating is finished, the blue-light-resistant and ultraviolet-resistant pressure-sensitive adhesive enters an oven to be heated, dried and cured, the oven is divided into seven sections, the temperature of each section is 80 ℃, 100 ℃, 120 ℃, 140 ℃, 130 ℃, 120 ℃, 100 ℃, and the length of each section of the oven is 4 meters, and after the blue-light-resistant and ultraviolet-resistant pressure-sensitive adhesive is taken out of the oven, a blue-light-resistant and ultraviolet-resistant optical adhesive coating with the thickness of 42 micrometers is formed on the substrate layer 1;

s5, attaching a silicon release film layer 2 with the thickness of 50 microns to the surface, far away from the substrate layer 1, of the blue-light-proof ultraviolet-resistant optical adhesive coating layer 3 to obtain a blue-light-proof ultraviolet-resistant protective film with the thickness of 120 microns.

Example 6

The grayish light blue anti-blue ultraviolet-resistant protective film provided by the embodiment 6 of the invention is prepared by the following method:

s1, selecting a PET film with the thickness of 50 mu m as a base material layer 1 for later use;

s2, coating the prepared organic silicon pressure-sensitive adhesive on one surface of the substrate layer 1 in a slit coating mode, heating, drying and curing to form a silica gel coating 4, and obtaining a first mixed substrate;

the organic silicon pressure-sensitive adhesive comprises the following components in percentage by mass:

the organic silicon resin is polydimethylsiloxane, accounting for 30 percent; MQ silicone resin accounting for 30%; 2% of tackifier; 0.2% of cross-linking agent; platinum catalyst, accounting for 1.5%; inhibitor, accounting for 0.1%; 0.5% of leveling agent; toluene, 15.7%; ethyl acetate, accounting for 20%;

after the organic silicon pressure-sensitive adhesive is blended, vacuum defoaming is carried out for 45 minutes, in the step, the gear pump rotating speed is 15 revolutions per minute, the feeding speed is 18 meters per minute, after coating is finished, the organic silicon pressure-sensitive adhesive enters an oven to be heated, dried and cured, the oven is divided into seven sections, the temperature of each section is 80 ℃, 100 ℃, 120 ℃, 140 ℃, 150 ℃, 130 ℃, and 4 meters, and after the organic silicon pressure-sensitive adhesive is taken out of the oven, a silica gel coating with the thickness of 28 micrometers is formed on the substrate layer 1;

s3, attaching a release film to the surface of the silica gel coating of the first mixed base material obtained in the step S2 to form a release film layer 5 with the thickness of 50 microns, and obtaining a second mixed base material;

s4, coating the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive on the other surface of the substrate layer 1 in a slit coating mode, heating, drying and curing to form a blue-light-proof and ultraviolet-resistant optical adhesive coating 3 with the thickness of 102 mu m, and obtaining a third mixed substrate;

the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive comprises the following components in percentage by mass:

35 percent of butyl acrylate, 15 percent of acrylic acid-2-ethyl hexyl ester, 10 percent of vinyl acetate, 3 percent of methacrylic acid glyceride, 5 percent of acrylic acid, 1 percent of benzoyl peroxide, 2 percent of ultraviolet screening agent, 1 percent of blue light absorber, 16.2 percent of toluene, 10 percent of ethyl acetate, 1 percent of tackifier, 0.5 percent of blue nano color paste, 0.05 percent of red nano color paste, 0.1 percent of orange nano color paste and 0.05 percent of black nano color paste;

after the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive is prepared, vacuum defoaming is carried out for 45 minutes, in the step, the gear pump rotating speed is 18 revolutions per minute, the feeding speed is 18 meters per minute, after coating is finished, the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive enters an oven to be heated, dried and cured, the oven is divided into seven sections, the temperature of each section is 80 ℃, 100 ℃, 120 ℃, 140 ℃, 130 ℃, 120 ℃, 100 ℃, and the length of each section of the oven is 4 meters, and after the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive is taken out of the oven, a blue-light-proof and ultraviolet-resistant optical adhesive coating with the thickness of 102 micrometers is formed on the substrate layer 1;

s5, attaching a silicon release film layer 2 with the thickness of 50 microns to the surface, far away from the substrate layer 1, of the blue-light-proof ultraviolet-resistant optical adhesive coating layer 3 to obtain a blue-light-proof ultraviolet-resistant protective film with the thickness of 180 microns.

Comparative example 1

The blue-light-proof ultraviolet-resistant protective film provided by the comparative example 1 is prepared by the following method:

s1', adding a blue light absorber (selected components and content are the same as those in the embodiment 1) and an ultraviolet screening agent (selected components and content are the same as those in the embodiment 1) into a PET master batch, and carrying out melt extrusion and biaxial tension molding to prepare a first blue-light-proof ultraviolet-resistant substrate layer with the thickness of 50 micrometers;

s2', coating an organic silicon pressure-sensitive adhesive (selected components and the content of each component are the same as those in embodiment 1) on one surface of a first blue-light-proof ultraviolet-resistant substrate layer in a slit coating mode, heating, drying and curing to form a silica gel coating with the thickness of 28 microns, and then attaching a release film layer with the thickness of 50 microns to prepare a first mixed film layer;

s3', coating a light-cured pressure-sensitive adhesive on the other surface of the first blue-light-proof ultraviolet-resistant base material layer in a roller coating mode, and carrying out low-pressure UV curing to form an optical adhesive layer with the thickness of 42 mu m to obtain a second mixed film layer;

the photo-curing pressure-sensitive adhesive comprises the following components in percentage by mass:

35% of butyl acrylate, 15% of acrylic acid-2-ethyl hexyl ester, 10% of vinyl acetate, 3% of glycerol methacrylate, 5% of acrylic acid, 1% of benzoyl peroxide, 2% of ultraviolet screening agent, 1% of blue light absorber, 17% of toluene, 10% of ethyl acetate and 1% of tackifier;

s4', attaching a silicon release film layer with the thickness of 50 microns to the surface, far away from the blue light-proof ultraviolet-resistant substrate layer, of the optical adhesive layer to obtain the blue light-proof ultraviolet-resistant protective film with the thickness of 120 microns.

Comparative example 2

The blue-light-proof ultraviolet-resistant protective film provided by the comparative example 2 is prepared by the following method:

the thickness of the optical adhesive layer in comparative example 1 was changed to 102 μm, and other steps and conditions were exactly the same as in comparative example 1, to obtain a blue light-blocking uv-resistant protective film using a thickness of 180 μm.

The blue-light-proof and ultraviolet-resistant protective films obtained in examples 1 to 6 and comparative examples 1 to 2 were respectively die-cut into the shape of an Apple iPhone 12 mobile phone, and were laminated to prepare a tempered film, which was subjected to the following tests.

The NS12 high-precision optical transmittance tester is used for testing the ultraviolet transmittance and the blue light blocking rate of the blue-light-proof ultraviolet-resistant protective film, and the WGT-S light transmittance and haze tester is used for testing the light transmittance and haze value of the toughened film.

For the color saturation test, three primary colors exist on a display screen of the mobile phone: red, green, blue, paste the tempering membrane that will prepare respectively on the cell-phone screen, show red alone, green, blue, three kinds of colours, the more bright-colored of picture that the cell-phone display screen shows, more penetrating, then the performance is better, vice versa, concrete testing result is as shown in following table 1:

table 1 results of measuring physical properties of blue light-blocking uv-blocking protective films obtained in examples 1 to 6 and comparative examples 1 to 2

As can be seen from the data in table 1, the blue-light-proof and ultraviolet-resistant protective films obtained in examples 1 to 6 of the present invention have a smaller influence on the three primary colors of the display screen of the mobile phone, while the blue-light-proof and ultraviolet-resistant protective films obtained in comparative examples 1 to 2 have a larger influence on the green and blue colors of the three primary colors of the display screen of the mobile phone; therefore, the comparison shows that the blue light blocking rate and the light transmittance of the blue light-proof ultraviolet-resistant protective film are obviously improved, so that the influence on the color saturation of a display screen of a mobile phone is small, and the blue light-proof ultraviolet-resistant protective film is obviously superior to that of a comparative example.

In conclusion, the blue-light-proof and ultraviolet-resistant optical adhesive coating is prepared by adopting the blue-light-proof and ultraviolet-resistant pressure-sensitive adhesive provided by the invention, and the screen protective film of an electronic product is prepared by adopting the coating and other film layers to be matched, so that when the protective film is used, the blue light from a display screen can be filtered, the blue-light-proof rate and the ultraviolet-resistant effect are improved, and the influence of the color of a blue light absorbent on the color saturation of the screen can be effectively avoided; in addition, the protective film disclosed by the invention not only has multiple colors of light green, light blue and light gray blue, but also integrates the double functions of blue light prevention and ultraviolet resistance, so that the performance and the quality of the protective film are effectively improved.

In addition, the protective film prepared by the preparation method has the advantages of low cost, high transmittance and good effects of blue light prevention and ultraviolet resistance, and the appearance color is light green, light blue and light grey blue, so that the color saturation of the display screen is not influenced, the screen light is soft, the eye fatigue is prevented, and the problems that the color saturation of the display screen and the visual aesthetic feeling of a user are seriously influenced due to the yellow appearance phenomenon of a blue light absorbent added in the existing blue light prevention protective film process are effectively solved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (13)

1. The blue-light-proof ultraviolet-resistant pressure-sensitive adhesive is characterized by comprising the following components in percentage by mass:

20-60% of butyl acrylate, 10-30% of acrylic acid-2-ethyl hexyl ester, 10-20% of vinyl acetate, 1-3% of glyceryl methacrylate, 1-10% of acrylic acid, 0.1-2% of benzoyl peroxide, 0.5-10% of ultraviolet screening agent, 0.1-2% of blue light absorbent, 7-40% of toluene, 7-40% of ethyl acetate, 1-5% of tackifier and 0.1-5% of blue nano color paste.

2. The blue-light-proof ultraviolet-resistant pressure-sensitive adhesive as claimed in claim 1, further comprising the following components in percentage by mass: 0.01-0.8% of yellow nano color paste.

3. The blue-light-proof ultraviolet-resistant pressure-sensitive adhesive as claimed in claim 1, further comprising the following components in percentage by mass: 0.05 to 0.5 percent of orange nano color paste and 0.01 to 0.8 percent of red nano color paste.

4. The blue-light-proof ultraviolet-resistant pressure-sensitive adhesive as claimed in claim 3, further comprising the following components in percentage by mass: 0.01 to 0.8 percent of black nano color paste.

5. The blue-light preventing and ultraviolet-resisting pressure sensitive adhesive as claimed in claim 4, wherein the ultraviolet screening agent is at least one of phenyl salicylate, ultraviolet absorbent UV-0, ultraviolet absorbent UV-P, ultraviolet absorbent UV-9, ultraviolet absorbent UV-321, ultraviolet absorbent UV-531 and ultraviolet absorbent RMB.

6. The blue-light-proof ultraviolet-resistant pressure-sensitive adhesive as claimed in claim 5, wherein the blue-light absorber is at least one of yellow color concentrate, yellow phosphor, nano zinc oxide, nano cerium oxide and nano microcrystal comprising SiO2, CdS and PbS.

7. The blue-light-proof ultraviolet-resistant pressure-sensitive adhesive as claimed in claim 6, wherein the blue nanometer color paste, the orange nanometer color paste, the red nanometer color paste and the black nanometer color paste are all inorganic nanometer dyes.

8. A blue-light-proof ultraviolet-resistant optical adhesive coating used for a blue-light-proof ultraviolet-resistant protective film is characterized in that the blue-light-proof ultraviolet-resistant optical adhesive coating is made of the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive of any one of claims 1 to 7.

9. The blue-light-proof ultraviolet-resistant protective film is characterized by comprising a substrate layer (1), a silicon release film layer (2), the blue-light-proof ultraviolet-resistant optical adhesive coating (3) of claim 8, a silica gel coating (4) and a release film layer (5); silicon is from type rete (2), prevents blue light anti ultraviolet optical cement coating (3) from outer to interior pile up in proper order and set up on a surface of substrate layer (1), silica gel coating (4) and set up on another surface of substrate layer (1) from type rete (5), just silica gel coating (4) are located substrate layer (1) and are from type between rete (5).

10. The protection film according to claim 9, wherein the thickness of the substrate layer (1) is 36-150 μm, the thickness of the blue light-proof anti-ultraviolet optical adhesive coating (3) is 25-200 μm, and the thickness of the silica gel coating (4) is 20-50 μm; the thickness of the silicon release film layer (2) is 30-70 mu m; the thickness of the release film layer (5) is 30-70 mu m; the thickness of the using layer of the blue-light-proof ultraviolet-resistant protective film is 120-180 mu m.

11. The protective film according to claim 10, wherein the silicone coating layer (4) is made of silicone pressure sensitive adhesive, and the release film layer (5) is a PET-based film.

12. The protective film according to claim 11, wherein the substrate layer (1) is made of one of a PET film, a PC film, a TPU film, a TPH film or a PMMA film.

13. A method for preparing a blue-light-shielding uv-blocking protective film according to any one of claims 9 to 12, comprising the steps of:

s1, selecting a substrate layer with the thickness of 36-150 mu m for later use;

s2, coating the prepared organic silicon pressure-sensitive adhesive on one surface of the substrate layer in a slit coating mode, heating, drying and curing to form a silica gel coating, and obtaining a first mixed substrate;

s3, attaching a release film to the surface of the silica gel coating of the first mixed base material obtained in the step S2 to form a release film layer, and obtaining a second mixed base material;

s4, coating the blue-light-proof ultraviolet-resistant pressure-sensitive adhesive on the other surface of the substrate layer in a slit coating mode, heating, drying and curing to form a blue-light-proof ultraviolet-resistant optical adhesive coating, and obtaining a third mixed substrate;

s5, attaching a silicon release film layer on the surface, far away from the base material layer, of the blue-light-proof and ultraviolet-resistant optical adhesive coating to obtain the blue-light-proof and ultraviolet-resistant protective film.

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