CN113031135A - Black and white reflecting film and preparation method thereof - Google Patents
Black and white reflecting film and preparation method thereof Download PDFInfo
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- CN113031135A CN113031135A CN202110379546.2A CN202110379546A CN113031135A CN 113031135 A CN113031135 A CN 113031135A CN 202110379546 A CN202110379546 A CN 202110379546A CN 113031135 A CN113031135 A CN 113031135A
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- 238000002360 preparation method Methods 0.000 title description 9
- 239000010410 layer Substances 0.000 claims abstract description 93
- 239000011241 protective layer Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000007639 printing Methods 0.000 claims description 55
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- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 5
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- 230000003666 anti-fingerprint Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 17
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- 238000012360 testing method Methods 0.000 description 16
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
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Abstract
The invention discloses a black and white reflective film, comprising: the ink comprises a matte protective layer, a first black ink layer, a second black ink layer and a white reflecting layer which are sequentially stacked; the thickness of the matte protective layer is 4-6 μm; the thickness of the first black ink layer is 2-5 μm; the thickness of the second black ink layer is 2-5 μm; the thickness of the white reflecting layer is 0.017mm-5.05 mm. The black-white reflecting film is printed by adopting a coating, so that the black-white reflecting film is uniform and firm in adhesion, reflection, refraction and better in optical performance, can resist alcohol and alkali corrosion by additionally adopting a matte protective layer, is better in stability, and can greatly improve the production efficiency by additionally adopting the anti-fingerprint characteristic, namely one cleaning process is omitted for production.
Description
Technical Field
The invention belongs to the field of optical materials, and particularly relates to a black-white reflecting film and a preparation method thereof.
Background
At present, the key light-emitting field of China gradually advances to high-end mature brands, and keyboards, keys and switches of various brands have no products with good light source technology; the key products of some key products with light source technology are repeatedly wiped to rework due to fingerprints, oil stains and dirt during the production of semi-finished products; there is uneven light emission; light leaks at the bottom and the periphery; the local part is bright and is easy to heat; safety concerns exist, and the quality of the product and the high end of the product are seriously affected.
At present, most key backlight products adopt LEDs arranged at the bottom, in the middle, around and the like to wait for light sources to emit light, because the bottom and the periphery are not provided with good reflecting films, the black and white reflecting films in the market at present almost completely transmit light, or one side of the black and white reflecting films is filled with glue, or two sides of the black and white reflecting films are filled with glue, the glue influences the normal light emission of the light sources, the light sources penetrate through the common reflecting films, the total refraction effect is not achieved, and the products become uneven in light emission; when the light source is assembled, fingerprints, dirt and oil stains are easily left on the reverse surface of the reflecting film, and when alcohol is needed to clean the surface of a product during assembly, the color of the product is changed, the color is faded, the production capacity and the delivery speed are seriously affected, the quality of the product cannot be improved, and the product is always a low-end quality product.
Therefore, it is necessary to invent a new black and white reflective film.
Accordingly, it is necessary to invent a new preparation method of black and white reflective film.
Disclosure of Invention
The invention provides a black-and-white reflecting film and a preparation method thereof, which solve the technical problem that the existing black-and-white reflecting film cannot achieve all refraction effects.
In order to solve the technical problem, an aspect of the present invention provides a black-and-white reflective film, including:
the ink comprises a matte protective layer, a first black ink layer, a second black ink layer and a white reflecting layer which are sequentially stacked;
the thickness of the matte protective layer is 4-6 μm;
the thickness of the first black ink layer is 2-5 μm;
the thickness of the second black ink layer is 2-5 μm;
the thickness of the white reflecting layer is 0.017mm-5.05 mm.
Preferably, the white reflecting layer is a standard white reflecting layer, and the thickness of the standard white reflecting layer is 0.015-5 mm.
Preferably, the white reflecting layer consists of a transparent plastic layer and a white ink layer, the thickness of the transparent plastic layer is 0.015-5mm, the white ink layer is attached to the front side and the back side of the transparent plastic layer, and the thickness of the white ink layer is 2-5 μm.
Preferably, the light transmittance of the transparent plastic layer is not less than 86%;
the transparent plastic layer is made of any one of optical PET, PS, PC, PMMA and acryl.
The invention also provides a preparation method of the black-white reflecting film, which comprises the following steps:
printing a second black ink layer on one side of the white reflecting layer;
printing a first black ink layer on the second black ink layer;
and printing a matte protective layer on the first black ink layer.
Preferably, the standard white reflection in the white reflecting layer is prepared by processing white, matte white, milky white, bright white and pearl white PET into a horizontal axis shrinkage of zero.
Preferably, the white ink and the transparent plastic layer in the white reflecting layer are prepared by the following steps:
and printing white ink on the front side and the back side of the PET layer.
Preferably, the printing temperature of the white ink is 80 ℃, the leveling speed is 65-75m/min, and the aperture of the filter ink screen is 250-300 meshes.
Preferably, the printing temperature of the black ink is 80 ℃, the leveling speed is 70-80m/min, and the aperture of the filter ink screen is 200-250 meshes.
Preferably, the printing temperature of the matte protective layer is 80 ℃, the leveling speed is 50-60m/min, the aperture of the matte filtering essential oil screen is 180-200 meshes, and the drying time is 8-10 seconds.
The black-white reflecting film does not adopt glue water but adopts a coating printing mode, so that the black-white reflecting film is uniform and firm in adhesion, better in optical performance, resistant to alcohol and alkali corrosion by additionally adopting the matte protective layer, better in stability, and additionally, the matte protective layer also has an anti-fingerprint characteristic, can greatly improve the production efficiency, and equivalently one cleaning procedure is omitted for production.
The preparation method of the black-white reflecting film adopts a printing mode, so that the process is mature, stable and controllable, and the yield of products is high. And the efficiency and quality are improved by improving the process and reducing the steps. Finally, the effects of high delivery efficiency, good product performance and high yield are achieved.
Drawings
Fig. 1 is a diagram of an embodiment of a black-white reflective film according to the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that all the directional indications (such as up, down, left, right, front, rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.
It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In order to solve the technical problem, an aspect of the embodiments of the present invention provides a black-and-white reflective film, including:
the ink comprises a matte protective layer, a first black ink layer, a second black ink layer, a white reflecting layer and a third black ink layer which are sequentially stacked;
the ink comprises a matte protective layer, a first black ink layer, a second black ink layer, a white reflecting layer and a third black ink layer which are sequentially stacked;
the thickness of the matte protective layer is 4-6 μm;
the thickness of the first black ink layer is 2-5 μm;
the thickness of the second black ink layer is 2-5 μm;
the thickness of the white reflecting layer is 0.017mm-5.05 mm.
In a preferred embodiment, the white reflecting layer is a standard white reflecting layer, and the thickness of the standard white reflecting layer is 0.015-5 mm. The process can be further simplified by choosing a standard white reflection.
In a preferred embodiment, the white reflecting layer is composed of a transparent plastic layer and a white ink layer, the thickness of the transparent plastic layer is 0.015-5mm, the white ink layer is attached to the front side and the back side of the transparent plastic layer, and the thickness of the white ink layer is 2-5 μm. The composite white reflecting layer has better performance, the optical performance can be further improved by regulating and controlling white ink, and the defect is that the process is more complicated, and the production cost can be improved.
In a preferred embodiment, the light transmittance of the transparent plastic layer is not less than 86%;
the transparent plastic layer is made of any one of optical PET, PS, PC, PMMA and acryl. The choice of materials in this range is a matter of choice after a compromise between cost and performance. Can meet the requirements and has no high cost.
In another aspect, the embodiment of the present invention provides a method for preparing a black-and-white reflective film, including the following steps:
s01: printing a second black ink layer on one surface of the white reflecting layer respectively;
s02: printing a first black ink layer on the second black ink layer;
s03: and printing a matte protective layer on the first black ink layer.
Specifically, in a preferred embodiment, the standard white reflection in the white reflective layer is prepared by treating white, matte white, milky white, bright white, pearl white PET to have zero percent shrinkage on the horizontal axis. The process has the advantages of convenience and rapidness, can greatly improve the production efficiency without post-treatment, and has the defect that the optical performance cannot be further regulated and improved.
Specifically, in a preferred embodiment, the preparation method of the white ink and transparent plastic layer in the white reflective layer, which is in accordance with the white reflective layer, comprises the following steps:
and printing white ink on the front side and the back side of the PET layer.
The optical performance of the attached white ink is definitely better than that of single PET standard white reflection, and the white ink is suitable for products with higher requirements and high added values.
In a further preferred embodiment, the printing temperature of the white ink is 80 ℃, the leveling speed is 65-75m/min, and the aperture of the filter ink screen is 250-300 meshes.
Specifically, in the steps S01-S03, the printing temperature of the black ink is 80 ℃, the leveling speed is 70-80m/min, and the aperture of the filter ink screen is 200-250 meshes.
Specifically, in step S03, the printing temperature of the matte protective layer is 80 ℃, the leveling speed is 50-60m/min, the mesh diameter of the matte oil filter is 180-200 meshes, and the drying time is 8-10 seconds. The printing process condition is to obtain the most suitable process range through step-by-step experimental debugging in actual production.
The black-white reflecting film firstly improves the adhesion performance of the PET material through pretreatment, then achieves uniform and stable optical effect through printing thin ink for multiple times and optimizing process conditions, and in addition, the optical performance is greatly improved without a gluing environment. In addition, due to the fact that the matte protective layer is arranged, the film can be resistant to alkali and alcohol corrosion and cannot be polluted by fingerprints, and therefore the film is more stable and durable.
The preparation method of the black-white reflecting film adopts a printing mode, so that the process is mature, stable and controllable, and the yield of products is high. The matte protective layer is arranged, so that the steps of cleaning and the like are omitted, and a printing process is adopted, so that a gluing process is not needed, the production efficiency is greatly improved, two processes are omitted, the yield can be improved, the optical performance can be influenced by gluing, and the defect is directly avoided by the process. Finally, the effects of high delivery efficiency, good product performance and high yield are achieved.
The invention will be further illustrated with reference to specific examples:
example 1
A: 0.015-0.25mm optical PET, PS, PC, PMMA and acryl with the transmittance of more than 90 percent. The temperature 185 and the flow rate of 190 ℃ for 10 minutes/100M are pre-contracted to reach the longitudinal and transverse expansion of 0 ℃. Double-sided corona;
b: printing white ink with thickness of 2-4UM, baking at 80-90 deg.C for 10 min at 500M flow rate, making white surface 100% non-light absorption and reflectivity 95-100%, and performing a hundred-grid test after printing;
c: after the white ink is cooled, the thickness of the black ink is printed to be 2-4UM, the baking temperature is 80-90 ℃, and the flow rate is 500M in 10 minutes. Carrying out a hundred-grid test after printing;
d: after the black ink is cooled, the thickness of the black ink is printed to be 2-4UM, the baking temperature is 80-90 ℃, and the flow rate is 500M in 10 minutes. Carrying out a hundred-grid test after printing;
e: printing transparent matt varnish, an alcohol-resistant coating, an abrasion-resistant alkali-resistant anti-fingerprint coating, and a thickness of 4-5UM, baking at 90-100 ℃ and a flow of 700M for 10 minutes. And carrying out a hundred-grid test after printing, wherein the effective part of the integral film material is tested to be free of pinholes, and 100% of the film material is free of light transmission, and obvious finger marks and fingerprints are not generated when the film material is touched by a hand with sweat. The total thickness T of the whole membrane material is 0.03-0.3 mm. The white printing ink can be printed and coated with 95% of non-light absorption and 95% to 100% of reflectivity according to the requirements of a light source, such as white, matte white, milky white, bright white, pearl white and the like.
Example 2
A: 0.3-5mm optical PET, PS, PC, PMMA and acrylic with the transmittance of more than 86%. The temperature is 185-190 ℃ for 30 minutes, the water shrinkage is pre-reduced to 0, and double-sided corona is carried out;
b: printing white ink with thickness of 3-5UM, and baking at 80-90 deg.C for 30 min. 98-100% of white surface does not absorb light, the reflectivity is 95-98%, and a hundred-grid test is carried out after printing;
c: after printing white, printing black ink with the thickness of 3-5UM, and baking at 80-90 ℃ for 30 minutes. Carrying out a hundred-grid test after printing;
d: after the black ink is cooled, the thickness of the black ink is printed to be 3-5UM, the baking temperature is 80-90 ℃, and the baking time is 30 minutes. Carrying out a hundred-grid test after printing;
e: printing transparent matt varnish, alcohol-resistant coating, wear-resistant alkali-resistant anti-fingerprint coating, thickness of 5-6UM, baking temperature of 90-100 ℃ for 30 minutes. And carrying out a hundred-grid test after printing, wherein the effective part of the integral film material is tested to be free of pinholes, and 100% of the film material is free of light transmission, and obvious finger marks and fingerprints are not generated when the film material is touched by a hand with sweat. The total thickness T of the whole film material is 0.35-5.2 mm.
Example 3
A: the thickness of the standard uncoated white reflecting film or the coated white reflecting film is 0.015-0.25 mm;
b: pre-shrinking to the longitudinal and transverse shrinkage ratio of 0;
c: printing black ink with thickness of 2-4UM, baking at 80-90 deg.C, and flow rate of 500M for 10 min. Carrying out a hundred-grid test after printing;
d: after the black ink is cooled, the thickness of the black ink is printed to be 2-4UM, the baking temperature is 80-90 ℃, and the flow rate is 500M in 10 minutes. Carrying out a hundred-grid test after printing;
e: printing transparent matt varnish, an alcohol-resistant coating, an abrasion-resistant alkali-resistant anti-fingerprint coating, and a thickness of 4-5UM, baking at 90-100 ℃ and a flow of 700M for 10 minutes. And carrying out a hundred-grid test after printing, wherein the effective part of the integral film material is tested to be free of pinholes, and 100% of the film material is free of light transmission, and obvious finger marks and fingerprints are not generated when the film material is touched by a hand with sweat. The total thickness T of the whole membrane material is 0.03-0.3 mm.
Example 4
A: the thickness of the standard uncoated white reflecting plate or the coated white reflecting plate is 0.3-5 mm;
b: printing white ink with thickness of 3-5UM, and baking at 80-90 deg.C for 30 min. 98-100% of white surface does not absorb light, the reflectivity is 95-98%, and a hundred-grid test is carried out after printing;
c: after printing white, printing black ink with the thickness of 3-5UM, and baking at 80-90 ℃ for 30 minutes. Carrying out a hundred-grid test after printing;
d: after the black ink is cooled, the thickness of the black ink is printed to be 3-5UM, the baking temperature is 80-90 ℃, and the baking time is 30 minutes. Carrying out a hundred-grid test after printing;
e: printing transparent matt varnish, alcohol-resistant coating, wear-resistant alkali-resistant anti-fingerprint coating, thickness of 5-6UM, baking temperature of 90-100 ℃ for 30 minutes. And carrying out a hundred-grid test after printing, and testing the whole film, the effective part of the plate material, no pinhole, no light transmission of 100 percent, and no obvious finger print or fingerprint when the film is touched by a hand with sweat. The total thickness T of the whole plate material is 0.32-5.2mm of the optical reflection finished plate.
It should be noted that, for the sake of simplicity, all the aforementioned embodiments are expressed as one.
Series of acts may be combined, it will be appreciated by those skilled in the art that the present invention is not limited by the order of acts described, as some steps may occur in other orders or concurrently with other steps in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or communication connection may be an indirect coupling or communication connection between devices or units through some interfaces, and may be in a telecommunication or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above examples are only used to illustrate the technical solutions of the present invention, and do not limit the scope of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from these embodiments without making any inventive step, fall within the scope of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art may still make various combinations, additions, deletions or other modifications of the features of the embodiments of the present invention according to the situation without conflict, so as to obtain different technical solutions without substantially departing from the spirit of the present invention, and these technical solutions also fall within the protection scope of the present invention.
Claims (10)
1. A black and white reflective film, comprising:
the ink comprises a matte protective layer, a first black ink layer, a second black ink layer and a white reflecting layer which are sequentially stacked;
the thickness of the matte protective layer is 4-6 μm;
the thickness of the first black ink layer is 2-5 μm;
the thickness of the second black ink layer is 2-5 μm;
the thickness of the white reflecting layer is 0.017mm-5.05 mm.
2. The black-and-white reflective film according to claim 1, wherein the white reflective layer is a standard white reflective layer having a thickness of 0.015 to 5 mm.
3. The black-and-white reflective film according to claim 1, wherein the white reflective layer comprises a transparent plastic layer and a white ink layer, the thickness of the transparent plastic layer is 0.015 to 5mm, the white ink layer is attached to both the front and back surfaces of the transparent plastic layer, and the thickness of the white ink layer is 2 to 5 μm.
4. The black-and-white reflective film according to claim 3, wherein the light transmittance of the transparent plastic layer is not less than 86%;
the transparent plastic layer is made of any one of optical PET, PS, PC, PMMA and acryl.
5. The method for producing a black-and-white reflective film according to any one of claims 1 to 4, comprising the steps of:
printing a second black ink layer on one side of the white reflecting layer;
printing a first black ink layer on the second black ink layer;
and printing a matte protective layer on the first black ink layer.
6. The method of manufacturing a black-and-white reflective film according to claim 5, wherein the standard white reflection in the white reflective layer is manufactured by treating white, matte white, milky white, brilliant white, and pearl white PET to have zero shrinkage on the horizontal axis.
7. The method for preparing a black-and-white reflective film according to claim 5, wherein the white ink and the transparent plastic layer in the white reflective layer are prepared by the following steps:
and printing white ink on the front side and the back side of the transparent plastic layer.
8. The method for preparing a black-and-white reflective film as claimed in claim 7, wherein the printing temperature of the white ink is 80 ℃, the leveling speed is 65-75m/min, and the aperture of the filter screen of the filter ink is 250-300 meshes.
9. The method for preparing a black-and-white reflective film as claimed in claim 5, wherein the printing temperature of the black ink is 80 ℃, the leveling speed is 70-80m/min, and the aperture of the filter screen of the filter ink is 200-250 meshes.
10. The method for preparing a black-and-white reflective film as claimed in claim 5, wherein the printing temperature of the matte protective layer is 80 ℃, the leveling speed is 50-60m/min, the mesh diameter of the matte oil filter is 180-200 meshes, and the drying time is 8-10 seconds.
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| CN105459655A (en) * | 2015-11-30 | 2016-04-06 | 广东星弛光电科技有限公司 | Printing method for cover bottom of mobile phone panel |
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2021
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| JP2002052653A (en) * | 2000-08-11 | 2002-02-19 | Dainippon Printing Co Ltd | Shading packing material |
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| CN204509180U (en) * | 2014-11-25 | 2015-07-29 | 苏州赛伍应用技术有限公司 | A kind of two-sided shading rubber belt |
| CN204440355U (en) * | 2015-03-09 | 2015-07-01 | 山东华芯富创电子科技有限公司 | White OGS touch screen ink structure |
| CN105459655A (en) * | 2015-11-30 | 2016-04-06 | 广东星弛光电科技有限公司 | Printing method for cover bottom of mobile phone panel |
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Application publication date: 20210625 |