CN111890766B - Peep-proof PE protective film for electronic screen and preparation method thereof - Google Patents
Peep-proof PE protective film for electronic screen and preparation method thereof Download PDFInfo
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- CN111890766B CN111890766B CN202010705077.4A CN202010705077A CN111890766B CN 111890766 B CN111890766 B CN 111890766B CN 202010705077 A CN202010705077 A CN 202010705077A CN 111890766 B CN111890766 B CN 111890766B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
Abstract
The invention provides a peep-proof PE protective film for an electronic screen and a preparation method thereof, wherein the peep-proof PE protective film for the electronic screen is respectively an upper protective layer, a peep-proof layer and a lower protective layer from outside to inside; the peep-proof layer contains a black micro-shutter structure, and the raw material components comprise, by weight, 80-100 parts of metallocene polyethylene (mPE), 20-40 parts of High Density Polyethylene (HDPE), and 0.5-2.5 parts of laser marking pigment; the section of the black micro-louver structure is in a parallel double-arc convex shape. The peep-proof PE protective film for the electronic screen has the advantages of simple structure and high light transmittance.
Description
Technical Field
The invention relates to the technical field of optics, in particular to a peep-proof PE protective film for an electronic screen and a preparation method thereof.
Background
With the development of electronic technology and mobile internet technology, personal electronic consumer products such as notebook computers, smart phones and tablet computers are more and more portable, and people can use display equipment to perform social contact, entertainment, office work and the like anytime and anywhere. In public places, however, the display device often carries the risk of being peeped by a person and the privacy of the person being revealed. In order to avoid the situation, people invent various peep-proof films attached to the screen, most of the peep-proof films are based on a micro-louver structure, so that information display light rays on the front side of the screen can be transmitted to eyes of users, and side light rays can be blocked by the opaque micro-louver structure, so that the content cannot be seen clearly by bystanders, and the personal privacy is protected. However, the structure inevitably causes the defects of screen light shielding and visual brightness reduction, and is easy to generate fatigue and influence the eyesight after long-time watching.
Application number is CN201711453776.9 discloses a peep-proof membrane, and peep-proof membrane includes supporting layer, peep-proof layer and lower supporting layer in proper order, and the peep-proof layer includes diffusion unit and printing opacity unit, and the printing opacity unit is filled between the diffusion unit, and the diffusion unit includes the light diffusion particle. By adding the light diffusion particles into the micro-louver structure, the problem that the light transmittance of the existing peep-proof film is low is solved. However, the manufacturing method is complex, the diffusion unit and the light transmission unit need to be filled twice, the distance between the micro-louver structures is small, incomplete filling is easy to occur, and the defects of air bubbles exist.
Application number is CN201410063204.X and has published a peep-proof membrane, and through digging out lightproof little shutter structure top part, the secondary is filled with transparent resin, reduces little shutter to the separation of the visible light of face, and then increases the transmissivity of light in the visible region, and this kind of structure is very complicated, and the actual processing degree of difficulty is very big however.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the peep-proof PE protective film for the electronic screen and the preparation method thereof, wherein the peep-proof PE protective film has the advantages of simple structure, high light transmittance and easiness in production process.
In order to achieve the purpose, the invention adopts the technical scheme that:
the first purpose of the invention is to provide a peep-proof PE protective film for an electronic screen, which is an upper protective layer, a peep-proof layer and a lower protective layer from outside to inside,
the upper protective layer and the lower protective layer are made of the same raw material components and comprise 80-100 parts by weight of metallocene polyethylene (mPE), 10-20 parts by weight of High Density Polyethylene (HDPE), 0.3-0.6 part by weight of an opening agent and 0.1-0.2 part by weight of an antistatic agent;
the peep-proof layer contains a black micro-shutter structure, and the raw material components comprise, by weight, 80-100 parts of metallocene polyethylene (mPE), 20-40 parts of High Density Polyethylene (HDPE), and 0.5-2.5 parts of laser marking pigment;
the section of the black micro-louver structure is in a parallel double-arc convex shape.
The metallocene polyethylene (mPE) has the advantages of high transparency, high toughness and high cleanliness, the high-density polyethylene (HDP E) has good heat resistance and cold resistance, higher rigidity and toughness and good mechanical strength, and a film product with both mechanical property and light transmission property can be obtained by blending the metallocene polyethylene (mPE) and the high-density polyethylene (HDP E). The laser marking pigment has no color, the light transmittance of the film is not influenced after the laser marking pigment is added, and laser energy can be absorbed when the laser marking pigment is irradiated by laser, so that the peripheral resin is carbonized to form a black opaque area, and a black micro-blind window structure with a required cross section shape can be manufactured inside the film by controlling the angle focus and the power of the laser and utilizing the 3D printing principle.
The black micro-louver structure is a parallel double-arc convex structure unit, and because the volumes of the upper end and the lower end are smaller, compared with a common rectangular or trapezoidal louver structure, screen light in a front visual area is shielded less, the light transmittance is high, and meanwhile, the screen light can be well separated in a peeping-proof area without affecting the peeping-proof effect.
Preferably, the raw material components of the upper protective layer and the lower protective layer comprise 100 parts by weight of metallocene polyethylene (mPE), 15 parts by weight of High Density Polyethylene (HDPE), 0.5 part by weight of an opening agent and 0.15 part by weight of an antistatic agent;
the peep-proof layer contains a black micro-blind window structure, and the raw material components comprise 100 parts by weight of metallocene polyethylene (mPE), 20 parts by weight of High Density Polyethylene (HDPE) and 0.8 part by weight of laser marking pigment.
Preferably, the laser marking pigment is one of merck Iriotec 8800/8805/8825, germany, DSM MICABS a206, and more preferably Iriotec 8805.
Preferably, the thickness of the upper protective layer is 10-50 μm, and more preferably 20-40 μm.
Preferably, the thickness of the peep-proof layer is 40-400 μm, and more preferably 100-300 μm;
the black micro-louver structure is a parallel double-arc convex structure unit, the height of the double-arc convex structure unit is equal to the thickness of the peep-proof layer, the maximum width of the double-arc convex structure unit is 20-40 mu m, and the distance between every two adjacent double-arc convex structure units is 40-60 mu m.
Preferably, the thickness of the lower protective layer is 10-50 μm, and more preferably 20-40 μm.
The second purpose of the invention is to provide a method for preparing a peep-proof PE protective film for an upper electronic screen, which comprises the following steps:
and 4, carrying out laser radiation blackening on the composite film to ensure that the laser marking pigment is blackened after absorbing radiation energy to form a black micro-shutter structure, thus preparing the peep-proof PE protective film for the electronic screen.
Preferably, in step 4, the laser radiation is gradually blackened from the bottom to the upper part of the peep-proof layer by adjusting the power and the angle, so that the cross section of the black micro-louver structure is in a double-arc convex surface shape, the thickness of the blackened layer is 5-15 μm each time, and the laser power is 15-20W.
Compared with the prior art, the invention has the following gain effects:
(1) the peep-proof PE protective film for the electronic screen, which is prepared by the invention, has a simple structure and high light transmittance. The peep-proof PE protective film is of a simple three-layer structure, the section of a black micro louver structure used for peep-proof in the middle is in a double-arc convex shape, the volumes of the upper end and the lower end of the black micro louver structure are small, compared with a louver structure with a rectangular or trapezoidal section in the prior art, the shielding areas of the upper part and the bottom part are small, and the light transmittance in a visible area on the front side is higher; the middle part of the section of the double-arc convex surface shape has larger thickness, so that the light rays emitted to the peeping-proof area can be well blocked, and the peeping-proof effect is ensured.
(2) The preparation method of the peep-proof PE protective film for the electronic screen, provided by the invention, is simple in process and can be produced in batch. The preparation method is based on a film extrusion process and a laser radiation marking process which are easy to produce quickly, avoids complex micro-carving, filling and secondary curing processes, and has the advantages of high production speed, low cost and mass production.
Drawings
Fig. 1 is a schematic front view of a peep-proof PE protective film for an electronic screen according to the present invention, fig. 2 is a schematic structural view of a peep-proof PE protective film for an electronic screen according to the present invention, fig. 3 is a schematic front view of a peep-proof protective film with a rectangular cross section of a black micro louver structure, fig. 4 is a schematic front view of a peep-proof protective film with a trapezoidal cross section of a black micro louver structure, and fig. 5 is a schematic light transmission view of a peep-proof PE protective film for an electronic screen according to the present invention;
wherein, 1-upper protective layer, 2-peep-proof layer, 3-lower protective layer, 4-black micro-shutter structure.
Detailed Description
The present invention is described in further detail below with reference to specific embodiments, which are merely exemplary and not exhaustive for the technical effects of the invention.
Example 1
A peep-proof PE protective film for an electronic screen is shown in figures 1 and 2 and comprises an upper protective layer 1, a peep-proof layer 2 and a lower protective layer 3 from outside to inside respectively, wherein the upper protective layer 1 and the lower protective layer 3 are made of the same raw material components and comprise 100 parts by weight of metallocene polyethylene (mPE), 15 parts by weight of High Density Polyethylene (HDPE), 0.5 part by weight of an opening agent and 0.15 part by weight of an antistatic agent; the thicknesses of the upper protective layer 1 and the lower protective layer 3 are both 20 micrometers;
the peep-proof layer 2 comprises a black micro-blind window structure 4, and comprises 100 parts by weight of metallocene polyethylene (mPE), 20 parts by weight of High Density Polyethylene (HDPE) and 0.8 part by weight of laser marking pigment; the black micro-louver 4 is composed of parallel double-arc convex surface structural units; the thickness of the peep-proof layer 2 is 200 micrometers, the height of the double-arc convex structure unit of the black micro-louver 4 is 200 micrometers, the maximum width of the double-arc convex structure unit is 40 micrometers, and the distance between every two adjacent double-arc convex structure units is 60 micrometers.
The preparation method comprises the following steps:
and 4, carrying out laser radiation blackening on the composite film to ensure that the laser marking pigment is blackened after absorbing radiation energy, and carrying out successive radiation blackening from the bottom to the upper part of the peep-proof layer for many times by adjusting power and angle to ensure that the cross section of the black micro-louver structure is a double-arc convex surface, the thickness of the blackening layer is 10 mu m by radiation each time, and the laser power is 18W, thus preparing the peep-proof PE protective film for the electronic screen.
Example 2
The peep-proof PE protective film for the electronic screen, which is provided by the embodiment 1, is characterized in that the laser marking pigment in the peep-proof layer 2 is 0.5 part.
The preparation method is the same as example 1.
Example 3
The peep-proof PE protective film for electronic screens provided in example 1, wherein the laser marking pigment in the peep-proof layer 2 is 1.8 parts, the thickness of the peep-proof layer 2 is 100 μm, the height of the double-arc convex structure unit of the black micro-louver 4 is 100 μm, the maximum width is 20 μm, and the distance between the adjacent double-arc convex structure units is 40 μm.
The preparation method is the same as example 1.
Example 4
The peep-proof PE protective film for the electronic screen provided by the embodiment 1, wherein the thickness of the peep-proof layer 2 is 400 μm.
The preparation method is the same as example 1.
Example 5
The peep-proof PE protective film for the electronic screen, provided by the embodiment 1, comprises 2.5 parts of laser marking pigment in the peep-proof layer 2.
The preparation process was as in example 1, except that the laser power in step 4 was 15W.
Example 6
The peep-proof PE protective film for the electronic screen, which is provided by the embodiment 1, is characterized in that the laser marking pigment in the peep-proof layer 2 is 0.5 part.
The preparation process was as in example 1, except that the laser power in step 4 was 20W.
Comparative example 1
The peep-proof PE protection film for electronic screen as provided in embodiment 1, the black micro louver 4 has a rectangular structural cross section.
The preparation method is the same as example 1.
Comparative example 2
The peep-proof PE protective film for electronic screens as provided in embodiment 1, wherein the black micro louver 4 has a trapezoidal structural cross section.
The preparation method is the same as example 1.
Comparative example 3
The peep-proof PE protective film for the electronic screen, which is provided by the embodiment 1, comprises 3 parts of laser marking pigment in the peep-proof layer 2.
The preparation method is the same as example 1.
Comparative example 4
The peep-proof PE protective film for the electronic screen, which is provided by the embodiment 1, is characterized in that the thickness of the peep-proof layer 2 is 600 μm.
The preparation method is the same as example 1.
Comparative example 5
The peep-proof PE protective film for the electronic screen is provided in the embodiment 1.
The preparation process was as in example 1, except that the laser power in step 4 was 25W.
The peep-proof PE protective films for electronic screens prepared in examples 1 to 6 and comparative examples 1 to 5 were used for light transmittance and viewing angle tests. Wherein, the light transmittance is measured according to the method specified in GB/T2410-2008 determination of light transmittance and haze of transparent plastic, the visual angle is determined by referring to GB/T18910.62-2002 liquid crystal display device part 6-2 testing method of liquid crystal display module, when the brightness observed at the visual angle is reduced to 1/2 of the brightness of the normal line of the protective film, the included angle formed between the visual angle and the normal line is taken as the visual angle, and the testing result is shown in Table 1:
TABLE 1 test data for examples 1-6 and comparative examples 1-5
| Light transmittance | Visual angle | |
| Example 1 | 85.2％ | 31.2° |
| Example 2 | 87.3％ | 38.7° |
| Example 3 | 83.6％ | 42.5° |
| Example 4 | 81.4％ | 22.4° |
| Example 5 | 82.1％ | 29.6° |
| Example 6 | 83.8％ | 33.4° |
| Comparative example 1 | 63.5％ | 26.4° |
| Comparative example 2 | 67.7％ | 28.5° |
| Comparative example 3 | 63.2％ | 27.4° |
| Comparative example 4 | 60.7％ | 18.6° |
| Comparative example 5 | 51.9％ | 25.9° |
As can be seen from the test results of the examples 1 to 6 and the comparative examples 1 to 5, the peep-proof PE protective film for the electronic screens of the examples 1 to 6 prepared by the invention has good light transmittance and visual angle, the light transmittance is more than 80 percent and is far larger than 63.5 percent of the comparative example 1 with the rectangular cross section of the black micro-louver structure and 67.7 percent of the comparative example 2 with the trapezoidal cross section of the black micro-louver structure; the visual angle is 22.4-42.5 degrees, which is similar to comparative example 1 and comparative example 2.
As can be seen from the comparison of the data of example 2, example 1, example 5 and comparative example 3, the light transmittance of the privacy film decreases and the viewing angle gradually decreases as the amount of the laser marking pigment is increased, so that privacy protective films having different light transmittances and viewing angles can be manufactured by adjusting the amount of the laser marking pigment, but when the amount of the laser marking pigment is excessively large, the absorption capability of the privacy layer for laser energy increases greatly, the edge portion of the double-arc convex structure of the black micro-louver 4 is also blackened when irradiated by laser, the light transmittance decreases drastically, and therefore the amount of the laser marking pigment is preferably not more than 2.5 parts.
As can be seen from the comparison of the data of example 1, example 4 and comparative example 4, the height of the black micro-louver 4 is increased simultaneously with the increase of the thickness of the privacy film, so that the viewing angle of the privacy film can be further reduced while the light transmittance is decreased, and the thickness of the privacy film is preferably not more than 400 μm in order to ensure good light transmittance.
As can be seen from comparison of the data of example 2, example 6 and comparative example 5, by increasing the laser power in the laser irradiation step, the opacity of the black micro-louver 4 is increased, and the visible angle is reduced while the light transmittance is decreased, but too much laser power also causes the edge portion of the double-arc convex structure of the black micro-louver 4 to be blackened, and thus the laser power is preferably not more than 20W.
Therefore, by adjusting the using amount of the laser marking pigment, the laser power in the laser radiation step and the thickness of the peep-proof layer, the light transmittance and the visual angle of the peep-proof PE protective film for the screen can be designed and adjusted to meet different use requirements.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (9)
1. The utility model provides an electronic screen is with peep-proof PE protection film which characterized in that: the peep-proof PE protective film for the electronic screen is an upper protective layer, a peep-proof layer and a lower protective layer from outside to inside; the upper protective layer and the lower protective layer are made of the same raw material components and comprise 80-100 parts by weight of metallocene polyethylene (mPE), 10-20 parts by weight of High Density Polyethylene (HDPE), 0.3-0.6 part by weight of an opening agent and 0.1-0.2 part by weight of an antistatic agent; the peep-proof layer contains a black micro-shutter structure, and the raw material components comprise, by weight, 80-100 parts of metallocene polyethylene (mPE), 20-40 parts of High Density Polyethylene (HDPE), and 0.5-2.5 parts of laser marking pigment; the section of the black micro-louver structure is in a parallel double-arc convex shape; the thickness of the upper protective layer is 10-50 mu m; the thickness of the peep-proof layer is 40-400 mu m; the black micro-louver structure is a parallel double-arc convex structure unit, the height of the double-arc convex structure unit is the thickness of the peep-proof layer, the maximum width of the double-arc convex structure unit is 20-40 mu m, and the distance between every two adjacent double-arc convex structure units is 40-60 mu m; the thickness of the lower protective layer is 10-50 mu m.
2. The peep-proof PE protection film for an electronic screen according to claim 1, characterized in that:
the components of the upper protective layer and the lower protective layer are the same, and the components comprise 100 parts of metallocene polyethylene (mPE), 15 parts of High Density Polyethylene (HDPE), 0.5 part of an opening agent and 0.15 part of an antistatic agent by weight; the peep-proof layer contains a black micro-blind window structure, and the raw material components comprise 100 parts by weight of metallocene polyethylene (mPE), 20 parts by weight of High Density Polyethylene (HDPE) and 0.8 part by weight of laser marking pigment.
3. The peep-proof PE protection film for an electronic screen according to any one of claims 1-2, characterized in that: the laser marking pigment is one of Merck Iriotec 8800/8805/8825, Germany, DSM MICABS A206, the Netherlands.
4. The peep-proof PE protective film for an electronic screen according to claim 3, characterized in that: the laser marking pigment is Iriotec 8805.
5. The peep-proof PE protection film for an electronic screen according to any one of claims 1-2, characterized in that: the thickness of the upper protective layer is 20-40 mu m.
6. The peep-proof PE protection film for an electronic screen according to any one of claims 1-2, characterized in that: the thickness of the peep-proof layer is 100-300 mu m.
7. The peep-proof PE protection film for an electronic screen according to any one of claims 1-2, characterized in that: the thickness of the lower protective layer is 20-40 mu m.
8. A method for preparing the peep-proof PE protective film for electronic screens according to any one of claims 1 to 7, characterized in that: step 1, preparing an upper protective layer film forming material and a lower protective layer film forming material: adding metallocene polyethylene (mPE), High Density Polyethylene (HDPE), a opening agent and an antistatic agent in the formula dosage into a mixer for mixing, then placing the mixture into a double-screw extruder for extrusion, and then placing the mixture into a pressurized internal mixer for internal mixing to obtain an upper protective layer film forming material and a lower protective layer film forming material; step 2, preparing a peep-proof layer film forming material: adding metallocene polyethylene (mPE), High Density Polyethylene (HDPE) and laser marking pigment in the formula dosage into a mixer for mixing, then placing the mixture into a double-screw extruder for extrusion, and then placing the mixture into a pressurized internal mixer for internal mixing to obtain a peep-proof layer film forming material; step 3, adding the upper protective layer film forming material, the peep-proof layer film forming material and the lower protective layer film forming material obtained in the steps 1 and 2 into a three-layer co-extrusion casting machine for co-extrusion casting stretching, and cooling and shaping to obtain a composite film; and 4, carrying out laser radiation blackening on the composite film to ensure that the laser marking pigment is blackened after absorbing radiation energy to form a black micro-shutter structure, thus preparing the peep-proof PE protective film for the electronic screen.
9. The method of claim 8, wherein: the laser radiation is gradually radiated and blackened from the bottom to the upper part of the peep-proof layer for multiple times by adjusting the power and the angle, so that the section of the black micro-louver structure is in a double-arc convex surface shape, the thickness of the blackened layer is 5-15 mu m each time, and the laser power is 15-20W.
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| JP4924941B2 (en) * | 2006-10-13 | 2012-04-25 | Ｎｌｔテクノロジー株式会社 | Optical elements, illumination optical devices, display devices, and electronic devices. |
| JP2009034905A (en) * | 2007-08-01 | 2009-02-19 | Nitto Denko Corp | Laser marking label |
| CN102985263B (en) * | 2010-07-15 | 2014-09-03 | 东洋制罐株式会社 | Laser marking film |
| CN202895839U (en) * | 2012-11-08 | 2013-04-24 | 江阴通利光电科技有限公司 | Three-dimensional (3D) optical stereoscopic sticking film |
| CN205291799U (en) * | 2015-10-26 | 2016-06-08 | 开平东豪材料科技有限公司 | TV set screen shipment protection is with two -sided anti electrostatic protection membrane |
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2020
- 2020-07-21 CN CN202010705077.4A patent/CN111890766B/en active Active
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