CN115819901A - High-temperature non-grain non-shiny matte film and preparation method thereof - Google Patents
High-temperature non-grain non-shiny matte film and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000011347 resin Substances 0.000 claims abstract description 62
- 229920005989 resin Polymers 0.000 claims abstract description 62
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- 239000003381 stabilizer Substances 0.000 claims abstract description 38
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 36
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- 239000004605 External Lubricant Substances 0.000 claims abstract description 31
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 29
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims description 58
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- 239000012752 auxiliary agent Substances 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 14
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 13
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- NIXOWILDQLNWCW-UHFFFAOYSA-M acrylate group Chemical group C(C=C)(=O)[O-] NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 6
- SHLNMHIRQGRGOL-UHFFFAOYSA-N barium zinc Chemical compound [Zn].[Ba] SHLNMHIRQGRGOL-UHFFFAOYSA-N 0.000 claims description 6
- OEIWPNWSDYFMIL-UHFFFAOYSA-N dioctyl benzene-1,4-dicarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C=C1 OEIWPNWSDYFMIL-UHFFFAOYSA-N 0.000 claims description 6
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- HNMCSUXJLGGQFO-UHFFFAOYSA-N hexaaluminum;hexasodium;tetrathietane;hexasilicate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].S1SSS1.S1SSS1.[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] HNMCSUXJLGGQFO-UHFFFAOYSA-N 0.000 description 1
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Images
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Abstract
The invention discloses a high-temperature non-grain non-shiny matte film and a preparation method thereof, and relates to the technical field of matte films. The raw materials of the matte film which does not have scattered lines and does not shine at high temperature comprise, by mass, 100 parts of matting resin, 18-27 parts of plasticizer, 5-7 parts of stabilizer, 0.5-2 parts of external lubricant, 1-3 parts of silicon dioxide and 1-3 parts of assistant; the mass fraction of the gel in the extinction resin is 40-60%. The matte film disclosed by the invention can keep the original texture after high-temperature lamination in the later period, solves the problem that the existing matte film is easy to have scattered texture after high-temperature lamination in the later period, and can improve the problem that the surface luminosity of the matte film becomes bright when the matte film is processed at 190-210 ℃.
Description
Technical Field
The invention relates to the technical field of matte films, in particular to a matte film which is not scattered and bright at a high temperature and a preparation method thereof.
Background
The PVC (polyvinyl chloride) matte film has excellent matte property, is widely applied to products such as home furnishing, decoration, household appliances, furniture, automotive interior and the like, and is mainly attached to the surface of the product to reduce the haze of the product and improve the visual effect.
The PVC matte film generally comprises a PVC substrate and a matte film positioned on the surface of the PVC substrate, and when the PVC matte film is prepared, the matte film is generally required to be prepared firstly, and then the matte film is attached to the surface of the PVC substrate to form the PVC matte film. The matte film has a matte effect, the surface of the matte film generally has textures, so that the visual effect of the matte film is further improved, the textures on the surface of the matte film are generally formed in an embossing mode under a high-temperature condition, the surface of the matte film or the matte film is in a molten state under the high-temperature condition, embossing is carried out under the state, and then rapid cooling is carried out, so that a high molecular substance in the molten state is frozen and shaped to form embossing, and the matte film is obtained.
When laminating matte film and PVC substrate, the method that present trade was commonly used adopts two running rollers to exert pressure and laminate under the uniform temperature (about 180 ~ 200 ℃), and when the laminating, because the temperature of laminating is higher, and the heat resistance of present conventional matte film is relatively poor, can lead to being frozen the molecular chain of the macromolecular substance of stereotyping in the matte film freely move again, make the texture on matte film surface can shallowly or disappear (the scattered line problem appears promptly), this can lead to the luminosity improvement of PVC matte film, give other people the sensation of shining, make the matte effect of PVC matte film reduce. Moreover, if the prepared PVC matte film is used for being pasted on the surface of a steel plate, the later stage needs to be pasted with the steel plate at a high temperature, and at the moment, the PVC matte film is subjected to secondary high-temperature treatment, so that the matte effect of the matte film can be further reduced, and the overall visual effect is poor. In order to solve the scattered line and the luminosity promotion problem that matte film appears when the high temperature laminating, some enterprises can press the dull polish line in the surface of matte film when the laminating of matte film and PVC substrate, handle through the impressed watermark once more to improve the matte effect of matte film. But because the high temperature performance of current matte membrane is relatively poor, even through pressing dull polish line processing when the laminating, also can not make the surface of matte membrane resume original matte degree completely, still have the problem that matte degree is lower, be difficult to satisfy customer and market demand.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a matte film which is not scattered in high temperature and does not shine, so that the original texture of the matte film can be kept after the matte film is attached at a high temperature in a later period, the problem that scattered lines are easy to appear after the existing matte film is attached at a high temperature in the later period is solved, and the problem that the surface luminosity of the matte film becomes bright when the matte film is processed at 190-210 ℃ can be improved.
Another object of the present invention is to provide a method for producing a matte film which does not have uneven grain at high temperature and does not shine.
In order to achieve the purpose, the invention adopts the following technical scheme:
the matte film without grain scattering and brightness at high temperature comprises, by mass, 100 parts of matting resin, 18-27 parts of plasticizer, 5-7 parts of stabilizer, 0.5-2 parts of external lubricant, 1-3 parts of silicon dioxide and 1-3 parts of assistant;
the mass fraction of the gel in the extinction resin is 40-60%.
Preferably, the particle size of the silica is 50 to 100nm.
Preferably, the plasticizer is any one or a combination of two of dioctyl terephthalate and diisononyl phthalate.
Preferably, the stabilizer is any one of or a combination of two of a barium zinc stabilizer and a calcium zinc stabilizer.
Preferably, the auxiliary agent is acrylate.
Preferably, the raw material of the matte film further comprises 0.1-1 part of pigment according to the mass part.
A preparation method of a matte film without high-temperature grain scattering and brightness is used for preparing the matte film without high-temperature grain scattering and brightness, and comprises the following steps:
step (1): mixing 100 parts of extinction resin, 5-7 parts of stabilizer, 1-3 parts of assistant, 0.5-2 parts of external lubricant, 1-3 parts of silicon dioxide and 18-27 parts of plasticizer, and uniformly stirring at 110-125 ℃;
step (2): mixing the mixture obtained in the step (1) in an internal mixer to obtain a melt composition, wherein the mixing temperature is 145-155 ℃;
and (3): refining the melt composition in an open mill at 105-115 ℃;
and (4): filtering the melt composition refined in the step (3), wherein the filtering temperature is 155-165 ℃;
and (5): and (4) calendering and molding the melt composition filtered in the step (4), and cooling to obtain the matte film.
Preferably, in the step (5), the temperature for calender molding is 185 to 200 ℃.
Preferably, in the step (5), the method of cooling the film formed by rolling is as follows: and conveying the film subjected to calendaring molding to a cooling wheel, wherein ice water with the temperature of 16-20 ℃ is introduced into the 1 st to 8 th cooling wheels, normal-temperature water is introduced into the 9 th to 20 th cooling wheels, and water with the temperature of 30-34 ℃ is introduced into the 21 st to 22 th cooling wheels.
The technical scheme has the following beneficial effects: according to the technical scheme, the extinction resin with the gel amount of 40-60% is used in a formula system, 1-3 parts of silicon dioxide are added in the formula, the extinction resin and the silicon dioxide act together, and the preparation process is improved, so that the high temperature resistance of the matte film at 190-210 ℃ can be improved, the original texture of the matte film can be kept during high-temperature lamination in the later period, and scattered grains are avoided; meanwhile, the problem that the surface brightness of the matte film becomes bright when the matte film is processed at 190-210 ℃ can be improved.
Drawings
FIG. 1 is a graph showing the results of photometric tests performed on a matte film prepared in example 4 of the present invention before high temperature treatment:
FIG. 2 is a graph showing the results of the photometric test performed on the matte film obtained in example 4 of the present invention after the high temperature treatment;
FIG. 3 is a graph showing the effects of the matte film obtained in example 1 before and after the high temperature resistance test;
FIG. 4 is a graph showing the effects of the matte film obtained in comparative example 2 before and after a high temperature resistance test;
FIG. 5 is a graph showing the effects of the frosted PVC film of comparative example 3 before and after the high temperature resistance test;
FIG. 6 is a graph showing the effects of the conventional matting film of comparative example 4 before and after the high-temperature resistance test.
Detailed Description
The technical scheme of the invention is further explained by combining the attached figures 1-2 and the specific implementation mode.
The matte film without grain scattering and brightening at high temperature comprises, by mass, 100 parts of matting resin, 18-27 parts of plasticizer, 5-7 parts of stabilizer, 0.5-2 parts of external lubricant, 1-3 parts of silicon dioxide and 1-3 parts of assistant;
the mass fraction of the gel in the extinction resin is 40-60%.
It is worth to explain that, due to the insufficient high temperature resistance of the existing matte film, the problems of scattered grains (the grains become shallow or disappear) and increased glossiness of the matte film during the later high-temperature lamination (the lamination of the matte film and a PVC base material under the condition of 180-200 ℃ and the treatment of laminating a steel plate at the high temperature of 190-210 ℃) can be caused, so that the matte film has poor light-eliminating effect and is difficult to achieve the expected visual effect. According to the technical scheme, the extinction resin with the gel amount of 40-60% is used in a formula system, and 1-3 parts of silicon dioxide are added in the formula to jointly act, so that the high temperature resistance of the matte film at 190-210 ℃ can be improved, the original texture of the matte film can be kept during high-temperature lamination at the later stage, and scattered texture is avoided; meanwhile, the problem that the surface brightness of the matte film becomes bright when the matte film is processed at 190-210 ℃ can be improved. The specific principle is as follows:
the gel amount of the extinction resin in the technical scheme is 40% -60%, the gel amount reflects the crosslinking degree from the side surface, the extinction resin with the gel amount of 40% -60% is selected, so that the crosslinking degree of the extinction resin is higher, the thermal stability of the extinction resin is good, PVC molecular chains of the extinction resin are mutually wound, the movement range is narrowed, the movement capacity of the molecular chains is poorer, and the PVC molecular chains are difficult to move freely during later high-temperature processing, so that the optical film can keep the original matt texture, and the defect of scattered stripes is prevented. Meanwhile, the thermal stability of silicon dioxide in the formula system is good, the thermal stability of the system can be further improved, and the silicon dioxide is a porous substance and has a good extinction effect, so that the surface luminosity of the matte film is further reduced, the extinction effect of the matte film is further improved, and the surface luminosity of the matte film is prevented from brightening during high-temperature processing in the later period. If the mass fraction of the middle gel of the extinction resin is less than 40%, the molecular chains in the extinction resin are less mutually wound, and are easy to freely move, so that the problem of scattered lines is easy to occur at high temperature; if the mass fraction of the middle gel of the extinction resin is more than 60%, the crosslinking degree of the extinction resin is too high, the processing difficulty is greatly increased, and the extinction resin is difficult to plasticize and form in the embossing forming process.
Further, the content of the matt resin in the formula system of the technical scheme is high, the mass part is 100 parts, and the main material of the matt resin is the matt resin, so that the matt degree of the product is ensured, and the embossing can still keep stable at high temperature. The main material of the formula system of the technical scheme is the extinction resin which is partially crosslinked, so that the processing difficulty is high, the processing treatment needs high temperature in the processing process, and the problems of material burning and difficult roll release are easily caused due to high processing temperature.
Preferably, the external lubricant in the technical scheme is an aromatic ester external lubricant.
It is worth pointing out that the extinction resin in the technical scheme is partially cross-linked polyvinyl chloride (PVC), a second component monomer with a diene or polyene structure is added as a cross-linking agent during polyvinyl chloride polymerization, vinyl chloride monomer in a suspension polymer is copolymerized with the cross-linking agent to generate a polymer, microgel is generated during polymerization, the resin microstructure has different viscoelasticity, and the extinction effect is achieved after processing.
Specifically, the matting resin in the scheme can be purchased directly on the market, and Tianyu matting powder TYXG-43 of Tianwei chemical industry Co.
Further, the particle size of the silica is 50 to 100nm.
Because the particle diameter of the silica among this technical scheme is little, be porous material, better extinction effect has, consequently add the extinction effect that silica can further improve the matte membrane in the matte membrane raw materials, silica's melting point is higher in addition, has the good advantage of thermal stability, it can further improve the thermal stability of matte membrane to add silica in the matte membrane raw materials for the matte membrane is when the high temperature laminating, be difficult to the scattered line (the line disappears).
Illustratively, the plasticizer is any one or a combination of dioctyl terephthalate and diisononyl phthalate.
It is worth to be noted that, in the technical scheme, the plasticizer is selected from dioctyl terephthalate and/or diisononyl phthalate, and the two plasticizers can better increase the plasticity of the matting resin in the preparation process and have good compatibility with the matting resin. Moreover, the mass part of the plasticizer in the raw material of the matte film in the technical scheme is 18-27 parts, and if the mass part of the plasticizer exceeds 27 parts, the prepared matte film has high luminosity, and the product cannot achieve the matte effect.
In a further description, the stabilizer is any one of or a combination of a barium zinc stabilizer and a calcium zinc stabilizer.
Further stated, the auxiliary agent is an acrylate.
Further, the raw material of the matte film further comprises 0.1-1 part of pigment according to the parts by weight.
In one embodiment of the invention, 0.1-1 part of pigment can be added into the formula of the matte film, so that the matte film has a certain color to meet the requirements of users, and the pigment can be ultramarine blue, ultramarine violet and the like.
A preparation method of a matte film without high-temperature grain scattering and brightness is used for preparing the matte film without high-temperature grain scattering and brightness, and comprises the following steps:
step (1): mixing 100 parts of extinction resin, 5-7 parts of stabilizer, 1-3 parts of assistant, 0.5-2 parts of external lubricant, 1-3 parts of silicon dioxide and 18-27 parts of plasticizer, and then uniformly stirring at 110-125 ℃;
step (2): mixing the mixture obtained in the step (1) in an internal mixer to obtain a melt composition, wherein the mixing temperature is 145-155 ℃;
and (3): refining the melt composition in an open mill at 105-115 ℃;
and (4): filtering the melt composition refined in the step (3), wherein the filtering temperature is 155-165 ℃;
and (5): and (4) calendering and molding the melt composition filtered in the step (4), and cooling to obtain the matte film.
The main material that this technical scheme adopted is the extinction resin of partial cross-linking, and the processing degree of difficulty of extinction resin is big, glues roller and fever material easily, consequently, the preparation method that adopts this technical scheme can let extinction resin mix more abundant and even with other materials, and simultaneously, the high temperature resistant stability of the matte membrane that makes is good, and the line that does not scatter behind the high temperature treatment does not shine, and in addition, even the laminating of later stage process high temperature treatment, the problem that the line that also does not appear scatters and shines.
Specifically, in the preparation method of the technical scheme, in the step (1), the matting resin and other materials can be mixed more fully and uniformly by stirring at 110-125 ℃, and if the stirring temperature is lower than 110 ℃, the matting resin and other materials are not easy to be mixed fully and uniformly. In the step (2), the mixture obtained in the step (1) is internally mixed into a melt under the condition of 145-155 ℃, and because the processing temperature of the extinction resin is high, the internal mixing temperature is increased to enable all raw materials to be in a melt, and no raw powder exists. In the step (3), when the melt composition is refined in an open mill, the temperature is reduced to 105-115 ℃, because the extinction resin cannot be processed at high temperature for a long time, otherwise, the extinction resin is easy to burn, but because the extinction resin is partially crosslinked, the plasticizing difficulty is high, and therefore, a long refining time is needed to plasticize the melt well. Therefore, compared with the traditional process (refining at about 150 ℃), the technical scheme greatly reduces the refining temperature, can avoid the problem of burning materials, prolongs the refining time of the open mill, continuously turns over materials, can increase the internal shearing of the mixed melt, and makes the melt more plasticized. In the step (4), when the milled melt composition is filtered, the filtering temperature is also low, 155 to 165 ℃ (preferably 155 to 160 ℃) because the filter also has larger shearing force, so as to reduce the risk of rapid aging and degradation of the melt. In the step (5), the filtered melt composition is subjected to calendering molding on a five-roll calender, wherein the processing temperature is increased (185-200 ℃), the melt is finally plasticized, and the calendering molding at a high temperature is required.
In the step (5), the temperature for the calender molding is 185 to 200 ℃.
In the step (5), the method of cooling the film formed by rolling is as follows: and conveying the film subjected to calendaring molding to a cooling wheel, wherein ice water with the temperature of 16-20 ℃ is introduced into the 1 st to 8 th cooling wheels, normal-temperature water is introduced into the 9 th to 20 th cooling wheels, and water with the temperature of 30-34 ℃ is introduced into the 21 st to 22 th cooling wheels.
Particularly, this technical scheme is at first with various raw and other materials input mixer, abundant misce bene, then in proper order through banbury mixer, mill, filter, five rolls calender, draw and get wheel, embossing roller, cooling zone, coiling machine preparation and obtain the matte membrane. The above-mentioned devices are commercially available.
Specifically, the operation method of the step (1) is as follows: the raw materials are put into a stirrer in the order of extinction resin, stabilizer, auxiliary agent, external lubricant, silicon dioxide and plasticizer, the temperature is 110-125 ℃, the raw materials are firstly rotated at low speed for 50-70S and then rotated at high speed for 350-450S, so that various materials are well dispersed and fully and uniformly mixed.
The operation method of the step (2) is as follows: enabling the mixture mixed in the step (1) to flow into an internal mixer, adding a pigment, and mixing to form a melt composition at the temperature of 145-155 ℃;
the operation method of the step (3) is as follows: enabling the mixed polyvinyl chloride melt composition to flow into an open mill, and uniformly turning, wherein the turning temperature is 105-115 ℃;
the operation method of the step (4) is as follows: enabling the melt composition refined in the step (3) to flow into an extrusion filter, and filtering out impurities at the temperature of 155-165 ℃;
the operation method of the step (5) is as follows: and (3) allowing the polyvinyl chloride colloidal block composition filtered in the step (4) to flow into a five-roller calender to be rolled into a film at the temperature of 185-200 ℃ to obtain a polyvinyl chloride film, and conveying the polyvinyl chloride film to a cooling wheel for cooling, wherein ice water at the temperature of 16-20 ℃ is introduced into the 1 st to 8 th cooling wheels, normal-temperature water is introduced into the 9 th to 20 th cooling wheels, water at the temperature of 30-34 ℃ is introduced into the 21 st to 22 th cooling wheels, and the matte film is obtained after full cooling and shaping.
Specifically, the five-roll calender is a calender with 5 calendering rollers, in the step (5), the filtered melt enters the calender with 5 calendering rollers to be calendered into the required polyvinyl chloride film thickness, then the polyvinyl chloride film is peeled off from the calendering rollers and enters the take-off wheel, and the melted film can be smoothly peeled off through the take-off wheel to realize continuous production. Embossing is carried out in a molten state after drawing, embossing is the embossing, the embossing can also be called embossing, and cooling is carried out in a cooling section after embossing. Wherein, the temperature and the speed of 5 calendering rollers in the five-roller calender are different, and the temperature range is 185-200 ℃.
The technical scheme of the invention is further illustrated by the following specific examples.
Example 1
The matte film with the non-scattered lines and the non-shiny appearance comprises the following raw materials in parts by mass: 100 parts of extinction resin, 18 parts of plasticizer, 7 parts of stabilizer, 2 parts of external lubricant, 2 parts of silicon dioxide and 2 parts of auxiliary agent; wherein the mass fraction of gel in the extinction resin is 50%, the particle size of silicon dioxide is 70nm, the plasticizer is dioctyl terephthalate, the stabilizer is a barium-zinc stabilizer, the external lubricant is an aromatic ester external lubricant, and the auxiliary agent is acrylic ester.
The method for preparing the matte film without grain scattering and brightness at high temperature in the embodiment is as follows:
step (1): sequentially loading the raw materials into a stirrer according to the sequence of the extinction resin, the stabilizer, the auxiliary agent, the external lubricant, the silicon dioxide and the plasticizer, stirring at the stirring temperature of 120 ℃, firstly rotating at a low speed for 50 seconds and then rotating at a high speed for 450 seconds to well disperse and fully and uniformly mix various materials;
step (2): feeding the mixture mixed in the step (1) into an internal mixer, and mixing the mixture into a melt composition at the temperature of 155 ℃;
and (3): enabling the mixed melt composition to flow into an open mill, and uniformly turning at the turning temperature of 110 ℃;
and (4): filtering the melt composition refined in the step (3) to filter out impurities, wherein the temperature is 165 ℃;
and (5): and (3) allowing the melt composition filtered in the step (4) to flow into a five-roller calender for calendering to form a film, wherein the temperature of the five-roller calender is 185-200 ℃ to obtain a polyvinyl chloride film, and conveying the polyvinyl chloride film to a cooling wheel for cooling, wherein ice water with the temperature of 16 ℃ is introduced into the 1 st to 8 th cooling wheels, normal-temperature water is introduced into the 9 th to 20 th cooling wheels, water with the temperature of 30 ℃ is introduced into the 21 st to 22 th cooling wheels, and the matte film is obtained after full cooling and shaping.
Example 2
The matte film with the non-scattered lines and the non-shiny appearance comprises the following raw materials in parts by mass: 100 parts of extinction resin, 20 parts of plasticizer, 6 parts of stabilizer, 1 part of external lubricant, 1 part of silicon dioxide and 1 part of auxiliary agent; wherein the mass fraction of gel in the extinction resin is 40%, the particle size of the silicon dioxide is 100nm, the plasticizer is diisononyl phthalate, the stabilizer is a calcium-zinc stabilizer, the external lubricant is an aromatic ester external lubricant, and the auxiliary agent is acrylate.
The method for preparing the matte film without grain scattering and brightness at high temperature in the embodiment is as follows:
step (1): sequentially loading the raw materials into a stirrer according to the sequence of the extinction resin, the stabilizer, the auxiliary agent, the external lubricant, the silicon dioxide and the plasticizer, stirring at the stirring temperature of 120 ℃, firstly rotating at a low speed for 60 seconds, and then rotating at a high speed for 450 seconds to well disperse and fully and uniformly mix various materials;
step (2): feeding the mixture mixed in the step (1) into an internal mixer, and mixing the mixture into a melt composition at 145 ℃;
and (3): enabling the mixed melt composition to flow into an open mill, and uniformly turning at 105 ℃;
and (4): filtering the melt composition refined in the step (3) to filter out impurities, wherein the temperature is 160 ℃;
and (5): and (3) allowing the melt composition filtered in the step (4) to flow into a five-roller calender for calendering to form a film, wherein the temperature of the five-roller calender is 185-200 ℃ to obtain a polyvinyl chloride film, and conveying the polyvinyl chloride film to a cooling wheel for cooling, wherein ice water with the temperature of 16 ℃ is introduced into the 1 st to 8 th cooling wheels, normal-temperature water is introduced into the 9 th to 20 th cooling wheels, water with the temperature of 34 ℃ is introduced into the 21 st to 22 th cooling wheels, and the matte film is obtained after full cooling and shaping.
Example 3
The matte film with the non-scattered lines and the non-shiny appearance comprises the following raw materials in parts by mass: 100 parts of extinction resin, 25 parts of plasticizer, 6 parts of stabilizer, 0.5 part of external lubricant, 2 parts of silicon dioxide, 3 parts of assistant and 1 part of pigment; wherein the mass fraction of gel in the extinction resin is 50%, the particle size of silicon dioxide is 80nm, the plasticizer is diisononyl phthalate, the stabilizer is a barium-zinc stabilizer, the external lubricant is an aromatic ester external lubricant, and the auxiliary agent is acrylate.
The method for preparing the matte film without grain scattering and brightness at high temperature in the embodiment is as follows:
step (1): sequentially loading the raw materials into a stirrer according to the sequence of the extinction resin, the stabilizer, the auxiliary agent, the external lubricant, the silicon dioxide and the plasticizer, stirring at the stirring temperature of 110 ℃, firstly rotating at a low speed for 70 seconds and then rotating at a high speed for 350 seconds to well disperse and fully and uniformly mix various materials;
step (2): the mixture mixed in the step (1) flows into an internal mixer and is mixed into a melt composition at the temperature of 150 ℃;
and (3): enabling the mixed melt composition to flow into an open mill, and uniformly turning at the turning temperature of 110 ℃;
and (4): filtering the melt composition refined in the step (3) to filter out impurities, wherein the temperature is 155 ℃;
and (5): and (3) allowing the melt composition filtered in the step (4) to flow into a five-roller calender for calendering to form a film, wherein the temperature of the five-roller calender is 185-200 ℃ to obtain a polyvinyl chloride film, and conveying the polyvinyl chloride film to a cooling wheel for cooling, wherein ice water with the temperature of 20 ℃ is introduced into the 1 st to 8 th cooling wheels, normal-temperature water is introduced into the 9 th to 20 th cooling wheels, water with the temperature of 30 ℃ is introduced into the 21 st to 22 th cooling wheels, and the matte film is obtained after full cooling and shaping.
Example 4
The matte film with the non-scattered lines and the non-shiny appearance comprises the following raw materials in parts by mass: 100 parts of extinction resin, 27 parts of plasticizer, 5 parts of stabilizer, 2 parts of external lubricant, 3 parts of silicon dioxide, 1 part of assistant and 1 part of pigment; wherein the mass fraction of gel in the extinction resin is 50%, the particle size of silicon dioxide is 80nm, the plasticizer is dioctyl terephthalate, the stabilizer is a barium-zinc stabilizer, the external lubricant is an aromatic ester external lubricant, and the auxiliary agent is acrylic ester.
The method for preparing the matte film without grain scattering and brightness at high temperature in the embodiment is as follows:
step (1): sequentially loading the raw materials into a stirrer according to the sequence of the extinction resin, the stabilizer, the auxiliary agent, the external lubricant, the silicon dioxide and the plasticizer, stirring at 125 ℃, firstly rotating at a low speed for 50 seconds and then rotating at a high speed for 400 seconds to ensure that various materials are well dispersed and fully and uniformly mixed;
step (2): the mixture mixed in the step (1) flows into an internal mixer and is mixed into a melt composition at the temperature of 150 ℃;
and (3): enabling the mixed melt composition to flow into an open mill, and uniformly turning at the turning temperature of 115 ℃;
and (4): filtering the melt composition refined in the step (3) to filter out impurities, wherein the temperature is 165 ℃;
and (5): and (3) flowing the melt composition filtered in the step (4) into a five-roller calender for calendering to form a film, wherein the temperature of the five-roller calender is 185-200 ℃ to obtain a polyvinyl chloride film, and conveying the polyvinyl chloride film to a cooling wheel for cooling, wherein 18 ℃ ice water is introduced into 1-8 cooling wheels, normal temperature water is introduced into 9-20 cooling wheels, 32 ℃ water is introduced into 21-22 cooling wheels, and the matte film is obtained after full cooling and shaping.
Example 5
The matte film with the non-scattered lines and the non-shiny appearance comprises the following raw materials in parts by mass: 100 parts of extinction resin, 23 parts of plasticizer, 6 parts of stabilizer, 1.5 parts of external lubricant, 1.5 parts of silicon dioxide, 3 parts of assistant and 0.5 part of pigment; wherein the mass fraction of gel in the extinction resin is 60%, the particle size of the silicon dioxide is 50nm, the plasticizer is diisononyl phthalate, the stabilizer is a calcium-zinc stabilizer, the external lubricant is an aromatic ester external lubricant, the auxiliary agent is acrylate, and the pigment is group violet.
The method for preparing the matte film without grain scattering and brightness at high temperature in the embodiment is as follows:
step (1): sequentially loading the raw materials into a stirrer according to the sequence of the extinction resin, the stabilizer, the auxiliary agent, the external lubricant, the silicon dioxide and the plasticizer, stirring at the stirring temperature of 120 ℃, firstly rotating at a low speed for 60 seconds and then rotating at a high speed for 430 seconds to well disperse and fully and uniformly mix various materials;
step (2): the mixture mixed in the step (1) flows into an internal mixer and is mixed into a melt composition at the temperature of 150 ℃;
and (3): enabling the mixed melt composition to flow into an open mill, and uniformly turning at 111 ℃;
and (4): filtering the melt composition refined in the step (3) to filter out impurities, wherein the temperature is 158 ℃;
and (5): and (3) flowing the melt composition filtered in the step (4) into a five-roller calendar for calendering to form a film, wherein the temperature of the five-roller calendar is 185-200 ℃ to obtain a polyvinyl chloride film, and conveying the polyvinyl chloride film to a cooling wheel for cooling, wherein ice water with the temperature of 16 ℃ is introduced into the 1 st to 8 th cooling wheels, normal-temperature water is introduced into the 9 th to 20 th cooling wheels, water with the temperature of 30 ℃ is introduced into the 21 st to 22 th cooling wheels, and the matte film is obtained after full cooling and shaping.
Incidentally, the surface luminance of the matte films obtained in examples 1 to 5 was measured by a luminance measuring instrument (gloss meter available from cushima electric instruments ltd, model No. WGG 60-Y4), and the luminance at this time was recorded as the luminance before the high-temperature treatment; then the matte films prepared in the embodiments 1 to 5 are respectively attached to five PVC base materials, two rollers are used for applying pressure to attach the matte films and the PVC base materials, the attaching temperature is 180 ℃, meanwhile, sand grains are pressed and ground on the surfaces of the matte films during attaching, the matte films and the PVC base materials are attached to form the PVC matte films, then the PVC matte films are attached to steel plates at the temperature of 200 ℃, five samples are respectively obtained, the luminosity of the five samples is detected by a luminosity detection instrument and recorded, and the luminosity at the moment is recorded as the luminosity after high-temperature treatment. The test results are shown in table 1 below:
TABLE 1 test results of examples 1 to 5
| Examples | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Luminosity before high temperature treatment | 7.8 degree | 8.4 degree | 8.1 degree | 8.0 degree | 7.2 degree |
| Luminosity after high temperature treatment | 3.3 degree | 3.9 degree | 3.8 degree | 3.7 degree | 2.5 degree |
As can be seen from table 1, the matte films prepared in this example have a low luminosity, and the luminosity of the surface of the matte films after high-temperature treatment is further reduced, and the luminosity range is within 2 to 4 degrees, and the matte effect is good, which is mainly because the matte films prepared in examples 1 to 5 have good high-temperature resistance and do not have the problem of scattered lines during high-temperature lamination, so the luminosity of the matte films prepared in examples 1 to 5 is not substantially reduced during high-temperature lamination, and simultaneously, the matte effect is superimposed because the matte films are subjected to primary pressure grinding sand lines during lamination, so that the glossiness of the matte films prepared in examples 1 to 5 is lower after high-temperature treatment. Therefore, the matte films prepared in examples 1 to 5 do not have the problem of surface brightness improvement after high-temperature treatment, and still have a good matte effect, and the reason that the matte films have the problem of brightness after high-temperature treatment is that the texture of the matte films becomes thin or disappears after high-temperature treatment, so that the experimental result shows that the matte films prepared in examples 1 to 5 are not easy to have the problem of scattered texture after high-temperature treatment. Therefore, the matte films of the embodiments 1 to 5 have the advantages of good high-temperature resistance and stability, can keep lines after high-temperature treatment, and do not have the defect of bright surface.
Comparative example 1
The preparation method of the matte film in the comparative example is basically the same as that of example 1, except that the matte film in the comparative example comprises the following raw materials in parts by mass: 100 parts of extinction resin, 30 parts of plasticizer, 7 parts of stabilizer, 2 parts of external lubricant, 2 parts of silicon dioxide and 2 parts of auxiliary agent. A matte film was produced by the production method of example 1.
Comparative example 2
The raw material composition and the production method of the matte film in this comparative example were substantially the same as those of example 1 except that the mass fraction of the gel in the matte resin of this comparative example was 30%.
Comparative example 3
This comparative example is a conventional frosted PVC film on the market.
Comparative example 4
This comparative example is a conventional matting film commercially available.
In the method, the luminosity of the surfaces of the films of comparative examples 1 to 4 is detected by a luminosity detection instrument and recorded, and the luminosity at the moment is the luminosity before high-temperature treatment; and the luminosity after the high-temperature treatment is detected according to the method ， And recorded, the test results are shown in table 2 below:
TABLE 2 examination results of comparative examples 1 to 4
| Comparative example | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 |
| Luminosity before |
9 degree | 10 degree | 10 degree | 10 degree |
| Luminosity after high temperature treatment | 5.5 degree | 11 degree | 21 degree | 15 degrees |
Specifically, as can be seen from the test results of comparative example 1, when the plasticizer is 30 parts in the formulation system of the matte film, the gloss of the prepared matte film is increased, especially after high-temperature treatment, the gloss is 4.5 degrees, and since some consumers require the gloss after high-temperature application not to be higher than 4 degrees, the gloss of comparative example 1 after high-temperature treatment is 5.5 degrees, which makes it difficult to satisfy the consumer demand for the matte effect. From the test results of comparative example 2, it can be seen that the matte film prepared from the matte resin with a low gel content has slightly improved glossiness after high-temperature treatment, and the matte effect does not reach the matte effects of the matte films prepared in examples 1 to 5, so that the matte film prepared in comparative example 2 has a problem of reduced texture during high-temperature lamination. From the test results of comparative example 3 and comparative example 4, it can be seen that the gloss of the conventional matte PVC film and the conventional matte film before high-temperature treatment is higher than that of the matte films prepared in examples 1 to 5, and the gloss of the conventional matte PVC film and the conventional matte film after high-temperature treatment is increased, and the original matte degree cannot be completely restored even by pressing the matte patterns during lamination, resulting in a decrease in matte effect.
Specifically, the matte film obtained in example 1, the matte film obtained in comparative example 2, the frosted PVC film of comparative example 3, and the conventional matte film of comparative example 4 were each subjected to a high temperature resistance test (left for 10 minutes in an environment of 200 ℃), and the effect patterns before and after the high temperature resistance test were compared, as shown in fig. 3 to 6. Fig. 3 is an effect diagram of the matte film prepared in example 1 before and after a high temperature resistance test, and as can be seen from fig. 3, the matte film prepared in the technical scheme basically has no problem of scattered grains after the high temperature resistance test, and can keep the original matte effect after the high temperature test, although slight wrinkles appear in the high temperature resistance test, when in actual production, certain pulling force is applied to two sides of the matte film for fixing, and such slight wrinkles do not appear when the matte film of this embodiment is attached in a later stage. FIG. 4 is a graph showing the effects of the matte film obtained in comparative example 2 before and after the high temperature resistance test, and it can be seen from FIG. 4 that the matte film obtained in comparative example 2 has a slightly raised luminosity due to the low gel content of the matting resin used therein, and the product after the high temperature resistance test has a slight moire at a part of the positions. Fig. 5 is an effect diagram before and after the frosted PVC film of comparative example 3 is subjected to a high temperature resistance test, because the frosted PVC film of comparative example 3 relies on frosted lines to achieve a matte effect, but the heat resistance of the product is poor, after the high temperature resistance test, the lines are basically scattered completely, and the frosted matte effect basically disappears. Fig. 6 is an effect diagram of the conventional matting film of comparative example 4 before and after the high temperature resistance test, and it can be seen from fig. 6 that the conventional matting film product purchased on the market has a more obvious problem of scattering lines after high temperature, a part of the frosting effect disappears, and the luminosity is improved obviously.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (9)
1. The matte film without grain scattering and brightening at high temperature is characterized in that the raw materials of the matte film comprise, by mass, 100 parts of matting resin, 18-27 parts of plasticizer, 5-7 parts of stabilizer, 0.5-2 parts of external lubricant, 1-3 parts of silicon dioxide and 1-3 parts of auxiliary agent;
the mass fraction of the gel in the extinction resin is 40-60%.
2. The high temperature non-graining non-glossy matte film according to claim 1 wherein the silica has a particle size of 50 to 100nm.
3. The high temperature non-graining, non-glossy matte film according to claim 1 wherein the plasticizer is either one or a combination of dioctyl terephthalate and diisononyl phthalate.
4. The high temperature non-graining non-shiny matte film of claim 1 wherein the stabilizer is either one or a combination of barium zinc stabilizer and calcium zinc stabilizer.
5. The high temperature non-graining non-glossy matte film according to claim 1 wherein said adjuvant is an acrylate.
6. The high temperature non-moire and non-shiny matte film as defined in claim 1 wherein the starting material for the matte film further comprises 0.1 to 1 parts by weight of a pigment.
7. A method for producing a high temperature non-graining non-shiny matte film, comprising the steps of:
step (1): mixing 100 parts of extinction resin, 5-7 parts of stabilizer, 1-3 parts of assistant, 0.5-2 parts of external lubricant, 1-3 parts of silicon dioxide and 18-27 parts of plasticizer, and then uniformly stirring at 110-125 ℃;
step (2): mixing the mixture obtained in the step (1) in an internal mixer to obtain a melt composition, wherein the mixing temperature is 145-155 ℃;
and (3): refining the melt composition in an open mill at 105-115 ℃;
and (4): filtering the melt composition refined in the step (3), wherein the filtering temperature is 155-165 ℃;
and (5): and (4) calendering and molding the melt composition filtered in the step (4), and cooling to obtain the matte film.
8. The method of producing a high temperature non-graining non-glossy matte film according to claim 7, wherein in said step (5), the temperature of calender molding is 185 to 200 ℃.
9. The method of producing a high temperature non-graining non-glossy matte film according to claim 8, wherein in said step (5), the method of cooling the calender-molded film is as follows: and conveying the film subjected to calendaring molding to a cooling wheel, wherein ice water with the temperature of 16-20 ℃ is introduced into the 1 st to 8 th cooling wheels, normal-temperature water is introduced into the 9 th to 20 th cooling wheels, and water with the temperature of 30-34 ℃ is introduced into the 21 st to 22 th cooling wheels.
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