CN113502036A - Functional film and preparation method and application thereof - Google Patents
Functional film and preparation method and application thereof Download PDFInfo
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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
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- C08J5/18—Manufacture of films or sheets
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C08K2201/00—Specific properties of additives
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/32—Compounds containing nitrogen bound to oxygen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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Abstract
The invention discloses a functional film and a preparation method and application thereof. The functional film comprises the following components in percentage by weight: 75-90% of polyester carrier, 2-20% of inorganic toner, 0-5% of organic toner, 0.2-1% of dispersant and 0.5-5% of functional assistant. The functional film disclosed by the invention has few crystal point flaws on the surface of the film, can achieve a relatively excellent shading effect under the condition of relatively thin thickness, does not need a printing process, is environment-friendly, has the appearances and performances of precise color, high brightness, opacity, high shading, high impact resistance and the like required by customers, has the functions of ultraviolet resistance and antibiosis and has a good application prospect.
Description
Technical Field
The invention relates to the technical field of functional membranes, and relates to a functional membrane and a preparation method and application thereof.
Background
The color film for helmets in the market at present mostly adopts a structure of printing a colored coating on a transparent film, the helmet color film with a printing-free structure is not reported in documents, and few manufacturers are developing the helmet color film. The color film of the traditional printing process has the defects of large pollution in the production process, influence on the air quality of a workshop, threat on the health of workers, unstable coloring and easy falling off in the later plastic suction molding process.
With the improvement of living standard, the attention degree of people to the health is promoted year by year, the national environmental protection regulations are gradually tightened, and the development requirement of the printing-free color film for the helmet is promoted. Although the printing-free structural color film is environment-friendly, the surface crystal point defects are more in the trial-run process, and the requirements of less defects, high color brightness and high shading degree are difficult to simultaneously meet particularly when the thickness is thinner. In addition, other functions of the helmet film other than the requirements of flaw, color and opacity are not reported.
CN101845202B discloses a white semi-transparent polyester film with low content of inorganic fine particles and a production method thereof, the polyester film can maintain practically sufficient reflection performance in the visible light region, has visible light transmittance of not more than 40%, and is stable against dimensional change caused by heat emitted from a light source. The composition for preparing the white semi-transparent polyester film comprises 93-98 wt% of polyester base material, 2-7 wt% of inorganic particles and auxiliary agent, wherein the content of the auxiliary agent is 0.002-0.2 wt% of the total weight. The polyester film has uniform color and luster and light transmittance, aging resistance and wear resistance, can be sprayed on the front side and the back side of the film, and has good definition and stereoscopic effect of sprayed advertisements.
CN107118505A discloses an antibacterial ABS color master batch, which is composed of the following components in parts by weight: 100 portions and 120 portions of PE carrier; 2-20 parts of toner; 5-10 parts of a surface treating agent; 3-8 parts of a dispersing agent; 0.5-3 parts of a heat stabilizer; 0.1-10 parts of plastic antibacterial agent. The invention has the advantages of good antibacterial effect, simple manufacturing process, easy operation, low production cost, less environmental pollution and wider application prospect, and solves the problems of unstable color, difficult color difference control and the like caused by poor thermal stability of the existing color master batch.
However, the polyester film prepared from the color master batch has to be improved in color, brightness, light transmittance and light shielding effect when the thickness is relatively thin. In the case of a relatively thin film, a large amount of toner is required to achieve a good light shielding effect, which increases the production cost, and at the same time, the mechanical properties of the film are affected by the excessive addition of toner.
Therefore, it is necessary to provide a color master batch which has the advantages of accurate color, high brightness, opacity, good shading performance, good impact resistance, ultraviolet resistance and antibacterial function, less crystal points and salient point flaws on the surface of the film, and capability of achieving excellent shading effect under the condition of thinner thickness.
Disclosure of Invention
The functional film has the advantages that crystal points and salient point flaws on the surface of the film are few, a small amount of toner is added under the condition of thinner thickness, the excellent shading effect can be achieved, a printing process is not needed, the functional film is environment-friendly, the appearance and the performance of accurate color, high brightness, opacity, high shading, high impact resistance and the like required by customers are achieved, and meanwhile, the functional film has the functions of ultraviolet resistance and antibiosis and has good application prospect.
One of the purposes of the invention is to provide a functional film, and the invention adopts the following technical scheme for achieving the purpose:
a functional film comprises the following components in percentage by weight:
the functional film has the advantages of ultraviolet resistance, antibacterial performance, accurate color, high brightness, opacity, good shading, good impact resistance and few surface crystal point flaws. The functional film has excellent uvioresistant performance and antibacterial performance due to the addition of the functional additive, and the problems of crystal points and salient points of the functional film are avoided; the dispersing agent is added, so that the dispersing performance of the inorganic toner in the functional film is better, the number of crystal points and salient points on the surface of the functional film is reduced, and the appearance quality is improved. The functional film prepared from the toner and the functional auxiliary agent, especially the color film for the helmet can still meet the color requirements of customers under the condition of very thin thickness of 0.01-1 mm, and meanwhile, the shading degree is effectively controlled, the brightness of the color film for the helmet is improved, and the visual effect of the color film for the helmet is better.
Specifically, the functional film comprises the following components in percentage by weight:
the polyester carrier is 75 to 90% by weight, for example, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90% or the like.
The inorganic toner is 2 to 20% by weight, for example, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20, etc. The dosage of the inorganic toner is lower than 2 percent, and the light-shielding performance of the functional film is poor and cannot meet the requirements of customers; above 20%, the shading performance is excessive, the cost is increased, the impact performance of the cantilever beam is deteriorated, and the cost performance is low.
The organic toner is 0 to 5% by weight, for example, 1%, 2%, 3%, 4%, 5%, etc.
The dispersant is 0.2 to 1% by weight, for example, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, etc.
The weight percentage of the functional auxiliary agent is 0.5-5%, for example, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 2%, 3%, 4%, 5%, etc. The dosage of the functional auxiliary agent is less than 0.5 percent, and the antibacterial, uvioresistant and aldehyde-removing effects of the functional film are poor; higher than 5%, excessive performance, high cost and low cost performance.
In the invention, the polyester carrier is Polycarbonate (PC) and/or polyethylene terephthalate-1, 4-cyclohexane dimethanol ester (PETG).
In the invention, the inorganic toner is any one or a mixture of at least two of white carbon black, calcium carbonate, carbon black, titanium dioxide and Ag powder.
In the invention, the organic toner is any one or a mixture of at least two of aniline black, azo yellow, anthraquinone blue and phthalocyanine blue.
In the invention, the dispersant is a mixture of at least two of stearic acid amide, palmitamide and ethylene bis-12-hydroxystearic acid amide. The composite dispersant is particularly suitable for dispersing, sticking prevention and agglomeration prevention of pigments, dyes and carbon black in matrix resin, and has better dispersing effect and higher dispersing efficiency than a single dispersant; especially, the dispersion of the nanometer functional auxiliary agent can be well achieved, the nanometer material is prevented from agglomerating, the grain size and the number of crystal points on the surface of the finished functional film are reduced, and the quality of the functional film is improved.
In the invention, the functional additive is a nano functional additive; preferably, the nano functional assistant is a mixture of at least two of nano titanium dioxide, nano silicon dioxide and nano zinc oxide. The nanometer functional additive adopting the combination can enable the material to have the uvioresistant performance, the antibacterial performance and the aldehyde removing function, and meanwhile, the nanometer additive does not generate crystal point influence on the appearance of the functional film, thereby being beneficial to improving the appearance quality of the functional film.
The functional assistant adopts nano titanium dioxide and adopts the ultraviolet catalysis principle that the nano titanium dioxide is a photocatalyst at the same time, can generate free radicals under the irradiation of ultraviolet light to participate in reaction, decompose harmful gases such as formaldehyde, acetaldehyde, acrolein and the like, kill bacteria, and form the photocatalyst again after the reaction, so that the quality is kept unchanged.
When the thickness of the functional film is 0.01-1 mm, the light transmittance of the functional film is 0-10%;
when the thickness of the functional film is 0.01-0.05 mm, the light transmittance of the functional film is less than 2.5%;
when the thickness of the functional film is 0.06-0.45 mm, the light transmittance of the functional film is less than 1.5%;
when the thickness of the functional film is 0.5-1 mm, the light transmittance of the functional film is less than 1%.
The second purpose of the invention is to provide a preparation method of the functional film, which is free from printing during preparation and avoids the problem of environmental pollution in the printing process; the method comprises the following steps: and (2) stirring and mixing the polyester carrier, the inorganic toner, the organic toner, the dispersing agent and the functional auxiliary agent according to the proportion, and extruding and rolling the particles to obtain the functional film after extruding and granulating.
The inorganic toner is subjected to special dispersion treatment, and the dispersion treatment has the effects of avoiding agglomeration in the mixing process of the inorganic toner and polyester carrier particles, ensuring the dispersion of the inorganic toner in the functional film in the polyester carrier and obviously improving the mixing uniformity of the polyester carrier and the inorganic toner, so that the uniform dispersion of the inorganic toner in the polyester carrier is ensured in the later extrusion calendering film-forming process, and the grain size and the number of crystal points in the film are obviously reduced.
Preferably, the specific dispersion treatment process is as follows: the polyester carrier and the inorganic toner are mixed with the dispersant, and the mixture is ground while stirring and dispersing, and the mixed material is ground to 300-350 meshes, for example, the ground meshes are 300 meshes, 325 meshes, 350 meshes and the like. The grinding fineness of the blend is the best in the mesh interval, and the surface crystal points of the prepared functional film are smaller and the number of the crystal points is less; the particle size of the auxiliary agent is larger than 300 meshes, and the crystal points on the surface of the prepared functional film are increased and the number of the crystal points is increased; above 350 meshes, the particle size of the auxiliary agent is smaller, the dispersibility is poor, the auxiliary agent is easy to agglomerate, large crystal point defects are formed on the surface of the functional film, and various performances such as antibiosis, ultraviolet resistance, aldehyde removal, impact resistance and the like are poor.
Preferably, the stirring and dispersing time is 0.1-1 h, such as 0.1h, 0.2h, 0.3h, 0.4h, 0.5h, 0.6h, 0.7h, 0.8h, 0.9h or 1 h.
The invention also aims to provide the application of the functional film, and the functional film is applied to the preparation of motorcycle helmets, electric vehicle helmets, bicycle helmets and children helmets.
Compared with the prior art, the invention has the beneficial effects that:
(1) the functional film provided by the invention has the advantages that the inorganic toner, the organic toner and the functional auxiliary agent are dispersed more uniformly, the crystal points and the convex point defects on the surface of the functional film can be obviously reduced, the appearance and the performance such as accurate color, high brightness, opacity and high impact resistance are realized, the long-term ultraviolet resistance, antibacterial property and aldehyde removal function are realized, and particularly, the manufactured color film for the helmet can effectively control the shading degree, improve the brightness of the color film for the helmet and enable the visual effect of the color film for the helmet to be better while the color requirement of a client can be met by the thin thickness (0.01-1 mm).
(2) The preparation method of the functional film disclosed by the invention is free from printing during preparation, and avoids the problem of environmental pollution in the printing process.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments.
Unless otherwise specified, various starting materials of the present invention are commercially available or prepared according to conventional methods in the art.
Example 1
The functional film of the embodiment comprises the following components in percentage by weight:
the polyester carrier is Mitsubishi chemical S-1000, the inorganic toner is titanium dioxide, the organic toner is azo yellow, the dispersant is a mixture of 0.3 mass percent of stearic acid amide (manufacturer is Jiangxi Dongyuan technology, the trademark is DY2016) and 0.7 mass percent of palmitamide (manufacturer is Jiangxi Dongyuan technology, the trademark is DY1698), and the functional additive is a mixture of 3 mass percent of nano titanium dioxide and 1 mass percent of nano zinc dioxide.
The preparation method of the color master batch of the embodiment comprises the following steps: and stirring and mixing the polyester carrier, the inorganic toner, the organic toner, the dispersing agent and the functional auxiliary agent according to the proportion, extruding and granulating, and then extruding and rolling the particles to obtain the functional film, wherein the thickness of the functional film is 0.25 mm.
Wherein, the toner is dispersed, the specific process is that the polyester carrier and the inorganic toner are mixed with the dispersant, the mixture is stirred and dispersed while being ground, and the mixed material is ground to 350 meshes; the stirring and dispersing time is 1 h.
Example 2
The functional film of the embodiment comprises the following components in percentage by weight:
the polyester carrier is Mitsubishi chemical S-1000, the inorganic toner is titanium dioxide, the organic toner is azo yellow, the dispersant is a mixture of 0.3 mass percent of stearic acid amide (manufacturer is Jiangxi Dongyuan technology, the trademark is DY2016) and 0.7 mass percent of palmitamide (manufacturer is Jiangxi Dongyuan technology, the trademark is DY1698), and the functional additive is a mixture of 3 mass percent of nano titanium dioxide and 1 mass percent of nano zinc dioxide.
The preparation method of the color master batch of the embodiment comprises the following steps: and stirring and mixing the polyester carrier, the inorganic toner, the organic toner, the dispersing agent and the functional auxiliary agent according to the proportion, extruding and granulating, and then extruding and rolling the particles to obtain the functional film, wherein the thickness of the functional film is 0.25 mm.
Wherein, the toner is dispersed, the specific process is that the polyester carrier and the inorganic toner are mixed with the dispersant, the mixture is stirred and dispersed while being ground, and the mixed material is ground to 350 meshes; the stirring and dispersing time is 1 h.
Example 3
The functional film of the embodiment comprises the following components in percentage by weight:
the polyester carrier is Mitsubishi chemical S-1000, the inorganic toner is titanium dioxide, the organic toner is azo yellow, the dispersant is a mixture of 0.3 mass percent of stearic acid amide (manufacturer is Jiangxi Dongyuan technology, the trademark is DY2016) and 0.7 mass percent of palmitamide (manufacturer is Jiangxi Dongyuan technology, the trademark is DY1698), and the functional additive is a mixture of 3 mass percent of nano titanium dioxide and 1 mass percent of nano zinc dioxide.
The preparation method of the color master batch of the embodiment comprises the following steps: and stirring and mixing the polyester carrier, the inorganic toner, the organic toner, the dispersing agent and the functional auxiliary agent according to the proportion, extruding and granulating, and then extruding and rolling the particles to obtain the functional film, wherein the thickness of the functional film is 0.25 mm.
Wherein, the toner is dispersed, the specific process is that the polyester carrier and the inorganic toner are mixed with the dispersant, the mixture is stirred and dispersed while being ground, and the mixed material is ground to 350 meshes; the stirring and dispersing time is 1 h.
Example 4
The functional film of the embodiment comprises the following components in percentage by weight:
the polyester carrier is Mitsubishi chemical S-1000, the inorganic toner is titanium dioxide, the organic toner is azo yellow, the dispersant is a mixture of 0.3 mass percent of stearic acid amide (manufacturer is Jiangxi Dongyuan technology, the trademark is DY2016) and 0.7 mass percent of palmitamide (manufacturer is Jiangxi Dongyuan technology, the trademark is DY1698), and the functional additive is a mixture of 3 mass percent of nano titanium dioxide and 1 mass percent of nano zinc dioxide.
The preparation method of the color master batch of the embodiment comprises the following steps: and stirring and mixing the polyester carrier, the inorganic toner, the organic toner, the dispersing agent and the functional auxiliary agent according to the proportion, extruding and granulating, and then extruding and rolling the particles to obtain the functional film, wherein the thickness of the functional film is 0.25 mm.
Wherein, the toner is dispersed, the specific process is that the polyester carrier and the inorganic toner are mixed with the dispersant, the mixture is stirred and dispersed while being ground, and the mixed material is ground to 350 meshes; the stirring and dispersing time is 1 h.
Example 5
The functional film of the embodiment comprises the following components in percentage by weight:
the polyester carrier is Mitsubishi chemical S-1000, the inorganic toner is titanium dioxide, the organic toner is azo yellow, the dispersant is a mixture of 0.3 mass percent of stearic acid amide (manufacturer is Jiangxi Dongyuan technology, the trademark is DY2016) and 0.7 mass percent of palmitamide (manufacturer is Jiangxi Dongyuan technology, the trademark is DY1698), and the functional additive is a mixture of 3 mass percent of nano titanium dioxide and 1 mass percent of nano zinc dioxide.
The preparation method of the color master batch of the embodiment comprises the following steps: and stirring and mixing the polyester carrier, the inorganic toner, the organic toner, the dispersing agent and the functional auxiliary agent according to the proportion, extruding and granulating, and then extruding and rolling the particles to obtain the functional film, wherein the thickness of the functional film is 0.25 mm.
Wherein, the toner is dispersed, the specific process is that the polyester carrier and the inorganic toner are mixed with the dispersant, the mixture is stirred and dispersed while being ground, and the mixed material is ground to 350 meshes; the stirring and dispersing time is 1 h.
Example 6
This example is different from example 1 in that the dispersant was replaced with a mixture of 0.3% by mass of ethylenebis 12-hydroxystearamide (designation: DY2016) and 0.7% by mass of palmitamide (designation: DY1698), and the others were the same as those of example 1.
Example 7
This example is different from example 1 in that the inorganic toner is replaced with a mixture of 10 mass% white carbon and 7 mass% calcium carbonate, and the rest is the same as example 1.
Example 8
The difference between this example and example 1 is that the functional assistant is replaced by a mixture of 3% by mass of nano titanium dioxide and 1% by mass of nano silicon dioxide, and the rest is the same as example 1.
Example 9
This example is different from example 1 in that the number of meshes after polishing in the dispersion treatment was 270 meshes, and the other examples are the same as example 1.
Example 10
This example is different from example 1 in that the number of meshes after polishing in the dispersion treatment was 400 meshes, and the other examples are the same as example 1.
Comparative example 1
The film of this comparative example is a conventional printed film, and the specific composition and preparation method are as follows:
the functional film of the comparative example comprises the following components in percentage by weight:
polycarbonate film (PC) 400 μm
Printing layer 50 μm
The particles used by the polycarbonate film are S-1000 of Mitsubishi chemistry, and the printing layer is a coating formed by solvent type ink thermal curing or UV curing.
The preparation method of the printed film of this comparative example was: firstly, printing a layer of solvent type ink (the color is yellow, blue, white or pink) on a transparent PC film, then entering a long drying tunnel for drying so as to ensure that an organic solvent is completely volatilized, and then promoting a printing layer to carry out curing and crosslinking reaction through UV irradiation to obtain a color film, wherein the thickness of the printing film is 0.45 mm.
Comparative example 2
This comparative example differs from example 1 in that, without the dispersant addition, the reduced amount of dispersant was added on average to the other components to ensure the total amount was unchanged, all otherwise identical to example 1.
Comparative example 3
This comparative example differs from example 1 in that the dispersant was used in an amount of 0.15%, and the rest was the same as in example 1.
Comparative example 4
This comparative example differs from example 1 in that the dispersant was used in an amount of 5%, and the rest was the same as in example 1.
Comparative example 5
This comparative example is different from example 1 in that the amount of the functional aid used was 0.4%, and the rest was the same as example 1.
Comparative example 6
This comparative example is different from example 1 in that the amount of the inorganic toner used was 25%, and the rest was the same as example 1. The performance of the functional films prepared in examples 1 to 10 and comparative examples 1 to 6 was tested, and the test results are shown in tables 1 and 2.
The testing standard of the cantilever beam notch impact performance is carried out according to ISO180, the testing standard of the light transmittance is carried out according to GB/T2410-2008, the testing standard of the crystal point defect is carried out according to GB6595-1986, the testing standard of the ultraviolet light transmittance is carried out according to a UV1901 series ultraviolet-visible light spectrophotometer with an operation instruction, the testing standard of the antibacterial performance is carried out according to GB31402, and the testing standard of the aldehyde content is carried out according to Guangdong Honda 0094Z-T0A-0000.
TABLE 1
TABLE 2
As can be seen from tables 1 and 2, in examples 1 to 5, the total amount of each component is 100% as long as the content of the polyester is changed and the amounts of the other components are unchanged by changing the content of the inorganic toner. Along with the reduction of the use amount of the inorganic toner, the visible light transmittance of the functional film is gradually increased, the number of crystal points is obviously reduced, the impact strength of a notch is gradually improved, and other properties are not greatly changed.
Example 6 the dispersant is replaced by a mixture of ethylene bis 12-hydroxystearamide and palmitamide, the inorganic toner and the nano functional additive are dispersed in the polyester matrix more uniformly, the crystal points on the surface of the functional film are smaller and smaller, and the appearance is better.
In example 7, the inorganic toner is replaced by a mixture of white carbon black and calcium carbonate, and due to mutual synergistic effect, the visible light transmittance of the functional film is lower, and the shading effect is better.
In example 8, the functional assistant is replaced by a mixture of nano titanium dioxide and nano silicon dioxide, and due to the similar structure of the nano silicon dioxide and the zinc dioxide, the ultraviolet transmittance, the antibacterial performance and the aldehyde removal effect of the functional film are equivalent.
Example 9 the number of meshes after polishing in the dispersion treatment was 270, and when the number of meshes was less than 300, the surface of the functional film
And
the crystal points of the film become more and more, and the appearance of the functional film is seriously influenced.
Example 10 the number of meshes after polishing in the dispersion treatment was 400 mesh, and when the number of meshes was more than 350 mesh, the surface of the functional film
The crystal points of the film become more and more, and the appearance of the functional film is seriously influenced. The main reason is that the powder is fine to a certain extent, and then is easy to agglomerate and difficult to disperse, resulting in the generation of large crystal points.
The film prepared by the conventional printing process in the comparative example 1 has no antibacterial property in the workshop environment of the processing process, weak UV resistance, serious standard exceeding of aldehyde content and 13.65 mu g/m of formaldehyde content3Acetaldehyde content 8.45. mu.g/m3Acrolein content 5.87 mu g/m3At a very thin film thickness, the light transmittance was 15.32%.
Comparative example 2 without the dispersant, the inorganic toner, the organic toner and the functional additive have poor dispersion effect in the polyester matrix, generate more large crystal points on the surface of the functional film, have poor shading effect and poor cantilever beam impact strength.
Comparative example 3 too little dispersant dosage, can make inorganic toner, organic toner and functional additive disperse the effect in the polyester matrix not good, produce more bigger crystalline point on the functional film surface, the shading effect is poor, the cantilever beam impact strength is worsened.
Comparative example 4 too much dispersant, can't let inorganic toner, organic toner and functional additive disperse the effect better in the polyester matrix, the crystal point size and quantity, visible light transmittance, antibacterial property, uvioresistant performance, cantilever beam impact strength, except that aldehyde performance of the surface of functional film are all equivalent to example 1, but the cost rises, the price/performance ratio is on the low side.
Comparative example 5 the amount of the functional assistant was 0.4%, and the antibacterial property, ultraviolet resistance and aldehyde removing property were inferior to those of example 1.
Comparative example 6 the amount of the inorganic toner was 25%, too much, the light-shielding property became good, but the dispersion effect of the toner in the matrix became poor, resulting in more crystal points on the surface of the functional film; meanwhile, the use amount of the inorganic toner is too much, so that the impact strength of the cantilever beam is reduced, the toughness of the functional film is reduced, the cost is higher, and the cost performance is lower.
The present invention is illustrated by the above-mentioned examples, but the present invention is not limited to the above-mentioned detailed process equipment and process flow, i.e. it is not meant to imply that the present invention must rely on the above-mentioned detailed process equipment and process flow to be practiced. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
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.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
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 (10)
1. The functional film is characterized by comprising the following components in percentage by weight:
2. the functional film according to claim 1, wherein the polyester support is polycarbonate and/or polyethylene terephthalate-1, 4-cyclohexanedimethanol ester.
3. The functional film according to claim 1 or 2, wherein the inorganic toner is any one or a mixture of at least two of white carbon black, calcium carbonate, carbon black, titanium dioxide and Ag powder.
4. The functional film according to claim 1, wherein the organic toner is any one of aniline black, azo yellow, anthraquinone blue, and phthalocyanine blue or a mixture of at least two of them.
5. The functional film according to claim 1, wherein the dispersant is a mixture of at least two of stearic acid amide, palmitic acid amide, and ethylene bis-12-hydroxystearic acid amide.
6. The functional film according to claim 1, wherein the functional agent is a nano functional agent;
the nano functional auxiliary agent is a mixture of at least two of nano titanium dioxide, nano silicon dioxide and nano zinc oxide.
7. The functional film according to claim 1, wherein when the thickness of the functional film is 0.01-1 mm, the light transmittance of the functional film is 0-10%;
when the thickness of the functional film is 0.01-0.05 mm, the light transmittance of the functional film is less than 2.5%;
when the thickness of the functional film is 0.06-0.45 mm, the light transmittance of the functional film is less than 1.5%;
when the thickness of the functional film is 0.5-1 mm, the light transmittance of the functional film is less than 1%.
8. A method for producing a functional film according to any one of claims 1 to 7, comprising the steps of: and (3) stirring and mixing the polyester carrier, the inorganic toner, the organic toner, the dispersing agent and the functional auxiliary agent according to the proportion, extruding and granulating, and rolling to obtain the functional film.
9. The production method according to claim 8, wherein the inorganic toner is subjected to a special dispersion treatment;
the specific process of the special dispersion treatment comprises the following steps: blending a polyester carrier and an inorganic toner with a dispersing agent, stirring and dispersing while grinding, and grinding the blended material to 300-350 meshes;
the stirring and dispersing time is 0.1-1 h.
10. Use of a functional film according to any of claims 1 to 7, wherein the functional film is applied in the manufacture of a motorcycle helmet, an electric vehicle helmet, a bicycle helmet, a children's helmet product.
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