CN111650674B - Near-infrared and visible light dual-waveband dark-color light-transmitting diaphragm, preparation method thereof and light-transmitting module - Google Patents
Near-infrared and visible light dual-waveband dark-color light-transmitting diaphragm, preparation method thereof and light-transmitting module Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J2483/10—Block- or graft-copolymers containing polysiloxane sequences
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
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Abstract
The invention discloses a dark-color light-transmitting membrane, which comprises a body layer and a non-glossy surface arranged on one side of the body layer, wherein the side, far away from the non-glossy surface, of the body layer is a glossy surface, the surface roughness of the glossy surface is smaller than that of the non-glossy surface, and the surface roughness of the non-glossy surface is 30-1000 times that of the glossy surface; the raw materials for preparing the dark-color light-transmitting film comprise a polymer base material and a light control agent, the mass ratio of the polymer base material to the light control agent is 8-60: 1, the light control agent comprises an infrared regulating and controlling agent and a full-light regulating and controlling agent, the mass ratio of the infrared regulating and controlling agent to the full-light regulating and controlling agent is 0.01-100: 1, and the full-light regulating and controlling agent is dark-color substance powder. According to the dark color light-transmitting film, the non-glossy surface and the glossy surface are arranged on the film, and the light control agent formed by the infrared ray regulating agent and the full light regulating agent is adopted, so that the dark color light-transmitting film can simultaneously transmit visible light and infrared light, and the transmittance in a controllable range is obtained.
Description
Technical Field
The invention particularly relates to a dark color light-transmitting diaphragm capable of transmitting near infrared light and visible light simultaneously, a preparation method of the dark color light-transmitting diaphragm and a light-transmitting module comprising the dark color light-transmitting diaphragm.
Background
With the development of science and technology, the update iteration rate of electronic products is continuously accelerated, the application fields and the functional requirements are more and more diversified, and the products are promoted to be continuously innovated. Such as: the application of the light-transmitting film in the optical industry in the field of intelligent household appliance 5G products still needs to invest in a large amount of scientific research work and continuously improves the market demand. At present, the market has single use requirement on the transmittance of a light-transmitting film, the requirement on the transmittance of visible light or near infrared light is only limited to one of the two, the two bands of the film cannot be effectively integrated, and the problem of overhigh input cost is caused by the non-integration. Therefore, there is a need for a light-transmitting film that can simultaneously transmit visible light and near-infrared light and has respective controllable transmittance ranges, and finally can achieve the purposes of miniaturization, integration, cost reduction, etc., so as to achieve wider application: such as the new 5G industry, requires consideration of both visible and near infrared light reception.
Disclosure of Invention
In view of the above, to solve the problems of the prior art and achieve the above object, the present invention provides a dark color light-transmitting film that can transmit visible light and near infrared light simultaneously.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dark-color light-transmitting film comprises a body layer and a non-glossy surface arranged on one side of the body layer, wherein the side, far away from the non-glossy surface, of the body layer is a glossy surface, the surface roughness Ra of the glossy surface is smaller than that of the non-glossy surface, and the surface roughness of the non-glossy surface is 30-1000 times that of the glossy surface; the raw materials for preparing the dark-color light-transmitting film comprise a high-molecular base material and a light control agent, the mass ratio of the high-molecular base material to the light control agent is 8-60: 1, the light control agent comprises a near-infrared regulating and controlling agent and a visible light regulating and controlling agent, the mass ratio of the near-infrared regulating and controlling agent to the visible light regulating and controlling agent is 0.01-100: 1, and the visible light regulating and controlling agent is dark-color substance powder. Preferably, the surface roughness of the non-glossy surface is 40-60 times of that of the glossy surface; the mass ratio of the polymer base material to the light control agent is 12-50: 1, and the mass ratio of the near-infrared regulating and controlling agent to the visible light regulating and controlling agent is 1-8: 1. The dark substance powder is a substance powder having a certain dark color such as carbon black. Ra is the arithmetic mean roughness, Rz is the mean peak-to-valley depth, and the non-glossy surface Rz is 20 to 120 times, preferably 20 to 40 times, the glossy surface Rz in the present invention.
The near-infrared regulating agent and the visible light regulating agent, namely dark substance powder such as carbon black and the like, are added into the raw materials for preparing the dark light-transmitting film, the adding proportion is controlled, and the structural design of the dark light-transmitting film is combined, so that the regulation of visible light and near-infrared light can be realized, the transmission requirements of the visible light and the near-infrared light can be met, and the visible light and near-infrared light transmission ranges of the dark light-transmitting film can be controlled respectively.
According to some preferred embodiments of the present invention, the non-glossy surface includes an optical structure disposed on the body layer, the optical structure includes a plurality of structural units in a dot shape, a sphere shape, a V-groove shape, and a regular or irregular distribution of concave and convex structural units, such as a saw-tooth shape, a pyramid shape, a triangular strip shape, a spherical crown shape, a continuously disposed arc shape, or a V shape; the structural units are regularly or irregularly distributed on one side of the body layer to form the non-glossy surface.
Preferably, each of the structural units has a width of 0.7 μm or more. 550nm is the middle left and right wavelength of visible light wavelength, 960nm is the middle left and right wavelength of near infrared light, the width of the structural unit is set to be 2 times of the target light wavelength or more, visible light and near infrared light can be well transmitted, and the light path is effectively changed.
According to some preferred embodiments of the present invention, the polymer substrate includes polycarbonate and polycarbonate-methyl siloxane copolymer, and the mass ratio of the polycarbonate to the polycarbonate-methyl siloxane copolymer is 2-3: 1.
According to some preferred implementation aspects of the invention, the dark substance powder accounts for 0.1-6% of the total mass of the raw materials of the dark light-transmitting film, and the dark substance powder is carbon black. In some embodiments of the present invention, carbon black having a particle size of 12 to 24nm is used. For example, carbon black of the cabot M1000 or R660 type may be used. The dark color light-transmitting film is controlled by the adding amount of the carbon black, and the transmittance of the dark color light-transmitting film is controlled, so that the black color light-transmitting film is prepared.
According to some preferable implementation aspects of the invention, the raw materials of the dark-color light-transmitting film further comprise color paste, and the color paste accounts for 0.01-0.5% of the total mass of the raw materials of the dark-color light-transmitting film. The addition of the color paste can play a certain selective shading role on one hand, and can better transmit near infrared light and visible light and shield and absorb ultraviolet light under the combined action of the near infrared regulating agent and the visible light regulating agent; on the other hand, the color of the product can be diversified, and the influence of the dark substance powder on the color of the film can be covered. The color of the color paste is kept to be the same as or close to that of the dark substance powder, the particle size of the pigment in the color paste is kept to be the same as or close to that of the dark substance powder, and the solid content and the viscosity of the color paste are selected conventionally.
According to some preferred implementation aspects of the invention, the raw materials of the dark-color light-transmitting film comprise the following components in percentage by mass:
according to some preferred embodiments of the invention, the antioxidant is a phosphonite antioxidant; the lubricant is pentaerythritol ester compound. The polycarbonate-methylsiloxane copolymer and the near-infrared controlling agent may be conventionally selected in the related art. For example, the polycarbonate-methyl siloxane copolymer is PC TARFLON NEO RC1700, and the copolymerization rate of the organic silicon is 3-9%; the near-infrared regulating agent is a perylene series compound with a perylene imide parent structure.
According to some preferred embodiments of the present invention, the glossy surface has a surface roughness Ra of 0.003 to 5 μm, and the non-glossy surface has a surface roughness Ra of 5 to 30 μm; the thickness of the dark color light-transmitting membrane is 0.5-5 mm, the thickness of the body layer of the membrane is about 0.5mm, and the thickness of the optical structure on the body layer is about 0.1-4.5 mm. The dark color light-transmitting films have different thicknesses and different transmittances. By controlling the surface roughness of the glossy surface and the non-glossy surface, the dark color light-transmitting film can better transmit visible light and near infrared light and respectively obtain the transmittance with controllable range. Preferably, the surface roughness Ra of the glossy surface is 0.01-1 μm, and the surface roughness Ra of the non-glossy surface is 5-20 μm; the thickness of the dark color light-transmitting film is 0.5-3 mm. The surface Rz of the glossy film is 0.05 to 10 μm, the surface Rz of the non-glossy film is 10 to 120 μm, preferably the surface Rz of the glossy film is 0.2 to 1 μm, and the surface Rz of the non-glossy film is 20 to 100 μm.
According to some preferred embodiments of the invention, the dark-colored light-transmitting film has a visible light transmittance of 3% to 50%; the transmittance of near infrared light of the dark color light-transmitting film is 15-60%. In the invention, the visible light transmittance and the near infrared transmittance are respectively tested.
According to some preferred embodiments of the invention, the body layer and the non-glossy surface are integrally formed. In some embodiments of the present invention, the membrane is prepared by a conventional mold injection molding process, such that the body layer and the non-glossy surface are integrally formed.
The invention also provides a preparation method of the dark-color light-transmitting film, which comprises the following steps:
1) preparing master batch: the raw materials for preparing the dark light-transmitting film comprise the following components in percentage by mass:
putting the materials into an extruder for extrusion granulation to obtain master batches;
2) preparing a mould: the mold is provided with a cavity for forming the dark-color light-transmitting film, the cavity is provided with a first surface for forming a glossy surface and a second surface for forming the non-glossy surface, the surface roughness Ra of the first surface is 0.003-5 mu m, and the surface roughness Ra of the second surface is 5-30 mu m;
the first surface for forming the glossy surface is formed in a polishing mode, and polishing equipment adopted in polishing comprises abrasive paper, polishing equipment common in the related field of a polishing wheel and the like; the second surface for forming the non-glossy surface is formed by polishing, and the abrasive used in polishing is common in the prior art, such as diamond sand, quartz sand and the like.
3) Preparing a membrane: heating the master batch in the step 1), injecting the heated master batch into a cavity in the mold, and cooling to obtain the dark transparent film, wherein the first surface is correspondingly prepared with a glossy surface, and the second surface is correspondingly prepared with a non-glossy surface.
Some parameters concerning the above-mentioned production process, such as those during sandblasting and injection molding, are routine choices for the person skilled in the art.
According to some preferred embodiments of the present invention, during extrusion, the temperature of each heating section of the extruder is 265-280 ℃, the rotation speed of the screw of the extruder main machine is 250-330 r/min, and the rotation speed of the hopper feeding screw is 24-35 r/min. Specifically, in some embodiments of the present invention, the extruder is provided with 4 heating zones, a first heating zone 265 ℃, a second heating zone 280 ℃, a third heating zone 280 ℃, and a fourth heating zone 275 ℃.
The invention also provides a light-transmitting module comprising the dark-color light-transmitting film, and other settings or parts which can be selected by a person skilled in the art according to common knowledge, wherein the non-glossy surface of the dark-color light-transmitting film is preferably oriented towards incident light.
Compared with the prior art, the invention has the advantages that: according to the dark color light-transmitting membrane, the non-glossy surface and the glossy surface are arranged on the membrane, and the light control agent formed by the near-infrared regulating and controlling agent and the visible light regulating and controlling agent is adopted, so that the dark color light-transmitting membrane can simultaneously transmit visible light and near-infrared light, and the light transmittance is regulated and controlled by controlling the surface roughness of the non-glossy surface and the proportion in the light regulating and controlling agent, and the dark color light-transmitting membrane is particularly suitable for preparing black light-transmitting membranes; and the light transmittance of the front side and the back side of the dark color light-transmitting film is basically kept consistent, so that the dark color light-transmitting film is wider in application range and is particularly suitable for intelligent household appliance products.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings may be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a dark colored light transmitting film in a preferred embodiment of the present invention;
FIG. 2 is a physical diagram of a black light-transmitting film according to a preferred embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a dark colored light transmitting film in another preferred embodiment of the present invention;
wherein: a body layer-1, a non-glossy surface-2 and a glossy surface-3.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not a whole embodiment. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of the present invention.
Example 1 light-transmitting Module and Black light-transmitting film
The light-transmitting module of the present embodiment includes a black light-transmitting film and other components or parts that can be selected by a person skilled in the art according to common knowledge.
Referring to fig. 1 and 2, the black light-transmitting film in this embodiment includes a body layer 1 and a non-glossy surface 2 disposed on one side of the body layer 1, and a glossy surface 3 is disposed on a side of the body layer 1 away from the non-glossy surface 2. During the actual use of the black light-transmitting film, incident light enters from one side of the black light-transmitting film and exits from the other side of the black light-transmitting film, and can be received by a sensor arranged behind the black light-transmitting film.
In this embodiment, the surface roughness Ra of the glossy surface 3 is 0.05 μm, the surface roughness Ra of the non-glossy surface 2 is 5 μm, and the thickness of the black light-transmitting film is 1mm, wherein the thickness of the body layer is 0.5mm, and the thickness of the non-glossy surface is 0.5 mm. In other embodiments, the glossy surface 3 has a surface roughness Ra of 0.003-5 μm, the non-glossy surface 2 has a surface roughness Ra of 5-30 μm, and the black transparent film has a thickness of 0.5-5 mm. The thickness of the black light-transmitting film changes, and the transmittance of the black light-transmitting film changes accordingly. As shown in fig. 1, the non-glossy surface 2 in this embodiment has a continuous irregular wave shape in cross section.
The black light-transmitting film in the embodiment comprises the following raw materials in percentage by mass:
in the components, the polycarbonate-methyl siloxane copolymer is PC TARFLON NEO RC1700, and the copolymerization rate of the organic silicon is 6 percent; the near-infrared regulating agent selects perylene series organic pigment with perylene imide parent structure, and perylene red with the grain diameter of 1100nm is selected in the embodiment; the antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite (168); the lubricant is pentaerythritol stearate. The carbon black is of a Kabet M1000 type, and the particle diameter is 12 nm. The color paste is black color paste with the particle size of 12 nm.
In other preferred embodiments of the invention, the antioxidant may be selected from the group consisting of phosphonites, such as: 3, 9-bis (2, 4-dicumylphenoxy) -2,4,8, 10-tetraoxa-3, 9-diphosphaspiro [5.5] undecane (S9228), tris (2, 4-di-t-butylphenyl) phosphite (168), etc.; the lubricant is pentaerythritol ester compounds, such as pentaerythritol oleate, pentaerythritol stearate and the like; the near-infrared regulating agent selects perylene compounds such as perylene red, perylene blue, perylene black, perylene violet and the like with the particle size of 900-1100 nm.
By arranging the non-glossy surface layer 2 and the glossy surface 3 on the black light-transmitting film, controlling the surface roughness of the glossy surface 3 and the non-glossy surface 2, and adopting the light control agent formed by the near-infrared regulating agent and the visible light regulating agent, the black light-transmitting film in the embodiment can simultaneously transmit near-infrared light and visible light, and the transmittance ranges of the visible light and the near-infrared light can be respectively regulated.
Through the structural design of the film and the formula design of the raw materials, the visible light transmittance of the black light-transmitting film of the embodiment is 4.6-4.7%; the near infrared light transmittance of the black light-transmitting film is 19.3-19.5%.
In the embodiment, the black light-transmitting film is prepared by a conventional mold injection molding process, so that the body layer 1 and the non-glossy surface 2 are integrally molded.
In this embodiment, the non-glossy surface has an irregular optical structure, and the surface roughness of the non-glossy surface is controlled as shown in fig. 1.
In order to achieve better light transmission and control of the near infrared and visible light, in other embodiments, the optical structure is arranged in a regular pattern: the optical structure comprises a plurality of structural units, wherein the structural units are in a dot shape, a spherical shape, a V-groove shape and regular or irregular distribution of concave and convex shapes; the structural units are regularly distributed on one side of the body layer to form a non-glossy surface. Wherein the width L of each structural unit is 0.7 μm or more, preferably 1.5 μm in the present embodiment. 550nm is the middle left and right wavelength of visible light wavelength, 960nm is the middle left and right wavelength of near infrared light, the width of the structural unit is set to be 2 times of the target light wavelength and more, visible light and near infrared light can be well transmitted, and the light path is effectively changed, as shown in fig. 3. And other parameters in the structural unit such as angle, radian and the like are designed conventionally.
Example 2
The light-transmitting module and the black light-transmitting film in this embodiment are substantially the same as those in embodiment 1, and the difference is that the black light-transmitting film in this embodiment comprises the following components in percentage by mass:
in the above components, specifically, the polycarbonate-methyl siloxane copolymer is PC TARFLON NEO RC1700, and the copolymerization rate of the organosilicon is 9%; the near-infrared regulating agent is perylene black with the particle size of 1050 nm; the ultraviolet blocking agent is 2- (2H-benzotriazole-2-yl) -4- (1,1,3, 3-tetramethyl butyl) phenol; the antioxidant is 3, 9-di (2, 4-dicumylphenoxy) -2,4,8, 10-tetraoxa-3, 9-diphosphaspiro [5.5] undecane (S9228); the lubricant is pentaerythritol oleate. The carbon black is in Kabet M1000 type, and has particle size of 12 nm. The color paste is black color paste with the particle size of 12 nm.
The visible light transmittance of the black light-transmitting film in the embodiment is 4.7-4.8%; the near infrared light transmittance of the black light-transmitting film is 19.6-19.7%.
Example 3
The light-transmitting module and the black light-transmitting film in this embodiment are basically the same as those in embodiment 1, and the difference is that the raw materials of the black light-transmitting film in this embodiment include the following components by mass percent:
in the above components, specifically, the polycarbonate-methyl siloxane copolymer is PC TARFLON NEO RC1700, and the copolymerization rate of the organosilicon is 3%; the near-infrared regulating agent is perylene black with the particle size of 900 nm; the ultraviolet blocking agent is 2, 2' - (1, 4-phenylene) bis (4H-3, 1-benzoxazine-4-ketone); the antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite (168); the lubricant is pentaerythritol stearate. The carbon black adopts Kabot R660 type number, and the particle size is 24 nm. The color paste is black color paste with the particle size of 24 nm.
The visible light transmittance of the black light-transmitting film in the embodiment is 4.6-4.7%; the near infrared light transmittance of the black light-transmitting film is 19.4-19.5%.
Example 4
The light-transmitting module and the black light-transmitting film in this embodiment are substantially the same as those in embodiment 1, and the difference is that the black light-transmitting film in this embodiment comprises the following components in percentage by mass:
in the above components, specifically, the polycarbonate-methyl siloxane copolymer is PC TARFLON NEO RC1700, and the copolymerization rate of the organosilicon is 3%; the near-infrared regulating agent is perylene black with the particle size of 900 nm; the ultraviolet blocking agent is 2, 2' - (1, 4-phenylene) bis (4H-3, 1-benzoxazine-4-ketone); the antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite (168); the lubricant is pentaerythritol stearate. The carbon black adopts Kabot R660 type number, and the particle size is 24 nm. The color paste is black color paste with the particle size of 24 nm.
The visible light transmittance of the black light-transmitting film in the embodiment is 4.0-4.1%; the near infrared light transmittance of the black light-transmitting film is 16.7-17.4%.
Example 5
The light-transmitting module and the black light-transmitting film in this embodiment are basically the same as those in embodiment 1, and the difference is that the raw materials of the black light-transmitting film in this embodiment include the following components by mass percent:
in the above components, specifically, the polycarbonate-methyl siloxane copolymer is PC TARFLON NEO RC1700, and the copolymerization rate of the organosilicon is 3%; the near-infrared regulating agent is perylene black with the particle size of 900 nm; the ultraviolet blocking agent is 2, 2' - (1, 4-phenylene) bis (4H-3, 1-benzoxazine-4-ketone); the antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite (168); the lubricant is pentaerythritol stearate. The carbon black adopts Kabot R660 type number, and the particle size is 24 nm. The color paste is black color paste with the particle size of 24 nm.
The visible light transmittance of the black light-transmitting film in the embodiment is 3.4-4.7%; the near infrared light transmittance of the black light-transmitting film is 15.6-16.1%.
EXAMPLE 6 preparation of Black light-transmitting film
The following takes the black light-transmitting film in example 1 as an example to introduce a preparation method of the film, and specifically comprises the following steps:
1) preparation of Master batch
The raw materials for preparing the black light-transmitting film are put into an extruder according to the proportion in the example 1 for extrusion granulation, and master batches are obtained.
The extruder is provided with 4 heating sections during extrusion, wherein the first heating section is 265 ℃, the second heating section is 280 ℃, the third heating section is 280 ℃, the fourth heating section is 275 ℃, the rotating speed of a screw of a main machine of the extruder is 280r/min, and the rotating speed of a feeding screw of a hopper is 30 r/min.
2) Preparing a mold
In this embodiment, the black light-transmitting film is prepared by a conventional mold injection molding process. The mold is provided with a cavity for forming the dark color light-transmitting membrane, the cavity comprises a first surface and a second surface, the first surface corresponds to a glossy surface, the second surface corresponds to a non-glossy surface, and the surface of the first surface is polished by 400# -1000 # polishing equipment, so that the surface roughness Ra of the glossy surface of the prepared black light-transmitting membrane is about 0.05-0.2 mu m; the surface of the second surface was treated with abrasive No. 8 so that the surface roughness Ra of the non-glossy surface of the black light-transmitting film obtained was about 5 μm.
Wherein, the grinding material is common in the prior art, such as carborundum, quartz sand and the like; polishing equipment such as sand paper, polishing equipment commonly used in the related field of grinding wheels, and the like. The polishing and blasting methods for the mold are by conventional means in the art. In other embodiments, different abrasive materials and polishing equipment may be used to achieve different surface roughness.
3) Preparation of the film
Heating the master batch in the step 1), injecting the heated master batch into a cavity in a mold, and preparing the black light-transmitting membrane by a mold injection molding process. The first surface correspondingly forms a glossy surface of the membrane, and the second surface correspondingly forms a non-glossy surface of the membrane. Some parameters in the preparation process, such as those in injection molding, are routinely selected by those skilled in the art.
For convenience of description, the preparation method is divided into three steps, but the order is not limited, and the mold can be prepared at the same time of preparing the master batch.
The steps are the process of preparing the light-transmitting film with the irregular non-glossy surface. When the light-transmitting film with the regular optical structure is prepared, the mold is replaced by the mold with the corresponding regular grains.
Example 7
The black light-transmitting films of examples 1 to 5 were subjected to a test of transmittance of visible light and near infrared light. For the test, 3pcs were used, i.e., the following test data are the average of 3 samples.
TABLE 1 test results of transmittance of visible light and near infrared light and color comparison
Note: the transmittance of visible light was measured as the transmittance at a wavelength of 550nm, and the transmittance of near infrared light was measured as the transmittance at a wavelength of 940 nm.
As can be seen from Table 1, in the black light-transmitting film in examples 1 to 5 of the present invention, when light enters from the non-glossy surface and exits from the glossy surface, the visible light transmittance is 4.6 to 4.8%, and the near-infrared light transmittance is 19.4 to 19.7%; when light enters from the glossy surface and exits from the non-glossy surface, the visible light transmittance is 4.6-4.7%, and the near infrared light transmittance is 19.0-19.5%. And the greater the surface roughness of the non-glossy surface, the lower the light transmittance. Namely, no matter light is emitted from the non-glossy surface or the glossy surface of the black light-transmitting film, the transmittance of visible light and near infrared light basically keeps consistent, so that the product has wide application range, for example, under the condition that intelligent household appliances need to sense natural light. Examples 4 and 5 show a decrease in light transmittance with an increase in the thickness of the product.
The starting materials not specifically mentioned in the above examples were all obtained commercially. The operation without particular reference to temperature is carried out at room temperature. The methods and conditions not specifically described may be those well known or conventional in the art.
In other embodiments, the amount of carbon black added may be changed or dark solid powder with a function similar to that of carbon black may be used to prepare other dark light-transmitting films, and the light transmittance may be controlled in a range.
According to the deep color light-transmitting membrane, the near infrared regulating agent and the carbon black visible light regulating agent are added into the prepared raw materials, the regulation of visible light and near infrared light can be realized, the transmission requirements of the visible light and the infrared light are met, and the visible light and the near infrared light of the deep color light-transmitting membrane respectively reach the transmission rates in controllable ranges through the structural design of the deep color light-transmitting membrane.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For numerical ranges, combinations of values between the endpoints of each range, between the endpoints of each range and the individual values, and between the individual values can result in one or more new numerical ranges, and such numerical ranges should be considered as being specifically disclosed herein.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (7)
1. The near-infrared visible light dual-band dark color light-transmitting membrane is characterized by comprising a body layer and a non-glossy surface arranged on one side of the body layer, wherein the side, far away from the non-glossy surface, of the body layer is a glossy surface, the surface roughness of the glossy surface is smaller than that of the non-glossy surface, and the surface roughness of the non-glossy surface is 30-1000 times that of the glossy surface; the non-glossy surface comprises an optical structure arranged on the body layer, the optical structure comprises a plurality of structural units, the width of each structural unit is more than 0.7 mu m, the surface roughness Ra of the glossy surface is 0.003-5 mu m, and the surface roughness Ra of the non-glossy surface is 5-30 mu m; the thickness of the dark-color light-transmitting membrane is 0.5-5 mm;
the raw materials for preparing the dark-color light-transmitting film comprise a high-molecular base material and a light control agent, the mass ratio of the high-molecular base material to the light control agent is 8-60: 1, the light control agent comprises a near-infrared regulating and controlling agent and a visible light regulating and controlling agent, the mass ratio of the near-infrared regulating and controlling agent to the visible light regulating and controlling agent is 1-8: 1, and the visible light regulating and controlling agent is dark-color substance powder;
the dark substance powder accounts for 0.1-6% of the total mass of the raw materials of the dark light-transmitting film; the raw materials of the dark color light-transmitting film also comprise color paste, wherein the color paste accounts for 0.01-0.5% of the total mass of the raw materials of the dark color light-transmitting film;
the near-infrared regulating agent is a perylene compound with a perylene imide parent structure, and the dark substance powder is carbon black; the near-infrared regulating agent and the deep color substance powder respectively account for 0.1-10% and 0.1-6% of the raw material of the deep color light-transmitting film in percentage by mass;
the visible light transmittance of the dark light-transmitting film is 3.4% -4.8%; the transmittance of near infrared light of the dark color light-transmitting film is 15-60 percent; the change of the transmittance range of visible light or near infrared light obtained by the light entering from the non-glossy surface or the glossy surface is maintained within 5 percent, and the visible light transmittance of the dark color light-transmitting film is less than the near infrared light transmittance thereof.
2. The dark-colored transparent film of claim 1, wherein the structural elements are in the shape of dots, spheres, V-grooves; the structural unit is distributed on one side of the body layer regularly or irregularly to form the non-glossy surface.
3. The dark light-transmitting film according to claim 1, wherein the polymer substrate comprises polycarbonate and a polycarbonate-methyl siloxane copolymer, and the mass ratio of the polycarbonate to the polycarbonate-methyl siloxane copolymer is 2-3: 1.
4. The dark color light-transmitting film according to any one of claims 1 to 3, wherein the raw material of the dark color light-transmitting film comprises the following components in percentage by mass:
5. the dark colored transparent film of claim 4, wherein said antioxidant is a phosphonite antioxidant; the lubricant is pentaerythritol ester compound.
6. A method for preparing a dark-colored light-transmitting film according to any one of claims 1 to 5, comprising the steps of:
1) preparing master batches: the raw materials for preparing the dark light-transmitting film comprise the following components in percentage by mass:
extruding and granulating the raw materials to obtain master batches;
2) preparing a mould: the mold is provided with a cavity for forming the dark-color light-transmitting film, the cavity is provided with a first surface for forming a glossy surface and a second surface for forming the non-glossy surface, the surface roughness Ra of the first surface is 0.003-5 mu m, and the surface roughness Ra of the second surface is 5-30 mu m;
3) preparing a membrane: heating the master batch in the step 1), injecting the heated master batch into a cavity in the mold, and cooling to obtain the dark transparent film, wherein the first surface is correspondingly prepared with a glossy surface, and the second surface is correspondingly prepared with a non-glossy surface.
7. A light transmissive module comprising the dark colored light transmissive film of any one of claims 1-5.
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