• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method for producing a film or a film (1), comprising the following steps a) applying at least one material (2) for producing the film or the film (1) to a moving belt (3), b) at least partial curing and / or partial drying of the infused material (2), wherein during step b) properties of the material and / or thermal state variables of a defined environment around the strip (3) are detected by means of at least one non-invasive spectroscopic method.
    公开号:AT514344A1
    申请号:T50326/2013
    申请日:2013-05-15
    公开日:2014-12-15
    发明作者:
    申请人:Berndorf Band Gmbh；
    IPC主号:
    专利说明:

    1
    The invention relates to a method for producing a film or a film, comprising the following steps a) applying at least one material for producing the film or film to a moving belt, b) at least partially curing and / or partially drying the material.
    Furthermore, the invention relates to a device for producing a film or a film, wherein the device has a band with a closed surface, in particular a circulating between at least one tail pulley and a drive drum endless belt.
    Methods and devices of the type mentioned in the production of films or films, such as polyvinyl alcohol films (PVOH films), such as those used in the pharmaceutical industry, or triacetate (TAC films), which, for example, for the production of LCD screens are used. In this case, an endless belt serving as a process belt for the application and transport of the film runs between a drive roller and a deflection roller, between which the belt is clamped. In the known solutions, a starting material in liquid form is poured onto the strip. The material can then form a homogeneous film on the belt surface, which can then be subjected to further process steps, such as drying, stretching, trimming, etc. In the following, for reasons of easier readability, the term "film" will also be used for films and in general for any type of sheet-like, in particular plate-like, single-layer or multi-layered structures of solid substances which are extensible or inextensibly elastic or inelastic may be used.
    In order to achieve a high production speed, the films are usually removed in a still wet state from the tape. The term "wet" in the case of solvent-based films refers to the solvent fraction still present in the film. For example, for a fully dried film, the solvent level would be zero. In the known solutions, however, it is not possible to determine the solvent content prior to the removal of the film from the tape. However, this is a major drawback since the solvent content of solvent-based films is a parameter important to the quality of the film being stripped. Also, with the known solutions, it is not possible to measure a change in the process parameters during the production process without interrupting the same.
    It is therefore an object of the invention to overcome the above-mentioned disadvantages.
    This object is achieved with a method of the aforementioned type according to the invention that during step b) properties of the material and / or thermal state variables of a defined environment are detected around the tape by means of at least one non-invasive spectroscopic method.
    The solution according to the invention makes it possible in a simple way during the entire production process by spectrographic analysis of the material of the film properties of the material, such as its degree of cure and / or degree of drying and / or its thickness and / or its solvent content and other process parameters such as temperature and pressure, etc. to capture exactly without interfering with the measurement in the manufacturing process or adversely affect this.
    It has proven to be particularly advantageous if, in step b), an infrared absorption method is used as the spectroscopic method. The infrared spectroscopy has proven particularly useful in the context of the invention, although other spectroscopic methods, such as, for example, Raman spectroscopy, can also be used.
    According to a variant of the invention, it can be provided that at least one actual value for at least one parameter of the material and / or the state variable of the defined environment around the band is determined from a spectrum detected by means of the spectroscopic method and compared with at least one desired value.
    According to a further development of the invention, an actuator for changing at least one of the state variables of the defined environment or a conveying speed of the belt can be actuated depending on a deviation of the actual value from the desired value.
    A preferred variant of the invention provides that the film or the film is a solvent-based film or a solvent-based film, wherein evaporation of the solvent results in drying and / or curing of the material and in step b) at at least one predefined measuring point current solvent content of the material is recorded.
    An advantageous embodiment of the invention provides that the material is poured onto the strip at a first location and the at least partially cured and / or dried material is removed from the strip at a second location and a section located between the first and second locations is cut into sections subdivided the same or different size and in each of the sections at predetermined time intervals parameters of the material and / or state variables of the defined environment are detected around the band. This variant of the invention allows a complete monitoring of the film-forming process as well as an exact localization of any disturbances that may occur.
    According to a preferred variant of the invention, intensity values of individual wavelengths or wavelength ranges in a spectrum can be values for 4/20 N2013 / 09100 4
    Parameters of the material and / or the state variables of the defined environment to be assigned to the band.
    Advantageously, the at least one parameter of the material is the thickness of the material and / or a solvent content of the material.
    The at least one determined state variable of the defined environment around the band may be an atmospheric pressure and / or a temperature in the defined environment.
    The above object can also be achieved with a device of the type mentioned in the present invention by comprising at least one spectrometer, preferably an optical spectrometer, which is connected to a controller of the device.
    For a better understanding of the invention, this will be explained in more detail with reference to the following figures.
    Each shows in a highly schematically simplified representation:
    1 shows a device according to the invention;
    Fig. 2 is an infrared spectrum;
    3 shows a first table with material parameters and values of state variables which are assigned to different intensity values of a wavelength;
    4 shows a second table with material parameters and values of state variables which are assigned to different intensity values of a wavelength.
    By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, the disclosures contained in the entire description are mutatis mutandis to identical parts with the same reference numerals 5/20 N2013 / 09100 5 or same component names transmitted can. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and are to be transferred to the new situation mutatis mutandis when a change in position. Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.
    According to FIG. 1, a device 1 according to the invention can have a band 4 which circulates between a reversing drum 2 and a drive drum 3 and is designed as an endless belt. However, the invention is not limited to the use of an endless belt, it could, inter alia, for example, a non-connected at its ends band 4 are used, which is unwound from a roll and wound up at one end again.
    The device 1 comprises one or more spectrometers 5, preferably optical spectrometers, which are connected to a controller 6 of the device 5. At this point it should be mentioned that within the scope of the invention only one spectrometer 5 can be used. If, in the following, spectrometers are referred to in the plural, the technical teaching relating to the measurement and evaluation of the recorded spectra, however, also applies mutatis mutandis to the use of only one spectrometer 5. The controller 6 can be connected to an actuator 9, via which process parameters, how about the temperature in a certain range over the belt 4 or the running speed of the belt 4, etc. can be adjusted. For example, the actuator 9 may be a brake that acts on the drive drum or a heater, etc.
    The device 1 is used to produce a film 7. This film may be a solvent-based film such as TAC films, PVOH films, etc. As the solvent, for example, in the case of TAC films, dichloromethane (methylene chloride) or, in the case of PVOH films, water may be used. 6/20 N2013 / 09100 6
    According to the method of the invention, a material 8 in liquid form is applied to the moving belt 4 to produce the film 7. The application of the material 8 can be done by pouring, for example by curtain coating, extrusion, spraying, etc. The cast-on material 8 forms a film-shaped layer on the belt 4 and passes through a process on the belt 4 which leads to at least partial drying and / or curing of the material 8.
    By means of a non-invasive spectroscopic method, which uses the spectrometer 5, properties of the material 8 and / or thermal state variables of a defined environment around the band 4 can be detected. The defined environment of the band 4 can be defined, for example, by a distance of the respective spectrometer 5 from the surface of the band 4.
    The spectroscopic method is preferably an infrared absorption method. In the context of the present invention, a Fourier transform infrared spectroscopic method in the near infrared range has proven particularly advantageous. Such methods are referred to for brevity as FTNIR spectroscopic methods. In this case, the spectrometer 5 used is a Fourier transform infrared spectrometer (FTIR spectrometer).
    The material 8 is illuminated with light wavelengths from the near infrared range and by means of the spectrometer 5 corresponding absorption spectra are measured at different locations of the device 1 in a conventional manner. If the measurement takes place above the band 4, an exciting light source can be arranged above the band 4 or, depending on the design, also be integrated into the respective spectrometer 5. The emitted light passes through the material 8 and a transmitted part is reflected on the surface of the belt 4, which may preferably be formed as a metal belt with a closed surface. Part of the light is absorbed by the material 8. The directions of the incident and reflected light are indicated in Fig. 1 with arrows. From the incident on the respective spectrometer 5 light, which is reflected from the surface of the belt 4 and passes through the material 8 in the direction of the corresponding spectrometer 5, then the 7/20 N2013 / 09100 7 shown in FIG
    Spectrum 11 is obtained in the form of an NIR absorption spectrum. If the measurement does not take place above the (reflecting) strip surface but in a region in which the material 8 already exists as a drawn-off film 7, then a light source 10 must be arranged opposite to the spectrometer 5. The film 7 in this case runs between the light source 10 and the spectrometer 5.
    In Fig. 2, the intensity is plotted against wavenumbers k. In the spectrum 11, there are characteristic wavenumbers ki, k2, which allow a statement about a certain material parameter, such as the solvent content of the material. The characteristic wavenumbers ki, k2 lie in regions in which, for example, a solvent used has a high absorption.
    As can be seen from the tables in FIGS. 3 and 4, different intensity values h, li, l, h, l, l, l, l, l of individual characteristic wavelengths or wavelength ranges in the spectrum 11 may have values for parameters of the material and / or the state variables assigned to the defined environment around the band 4.
    The assignment of individual parameters of the material or, for example, the process temperature Ti, Tn.Ti ^ Tü.T ^ T ^ .T ^ Ta at a certain point of the process can be by a direct assignment of the measured values of intensity for a certain wave number k -ι, k12, k-π, k2, k22, k2i to perform a concrete value of the parameter or the temperature. For example, the actual solvent content L-1, Lu, L12j L-π, L2, L2i, L &, L2 of the material 8 can be measured, for example, by weighing the film and at the same time the intensities h, In, l12, hi, l2, l21, l22, l2i the wavenumbers ki and k2 or the maximum intensities h, In, l12, hi, l2, l21 > l22, l2i be determined in a range of predeterminable size about these wavenumbers. At the same time, the process temperature in a fixed environment around the belt 4 can be measured. These measurements can be carried out for different solvent contents, so that an assignment of the intensity values h. In, I12, In, b, I21,122, bi to solvent contents or temperatures Ti, Tn, Ti2, Ti ,, Τ ^ Τ ^, ^ ^, T2i be carried out as in the tables shown in FIG. 3 and FIG. 4. At this point it should also be mentioned that a solvent content and the process temperature are very strongly correlated with each other, so that from the solvent content can also be closed to the appropriate temperature. In principle, other parameters can also be assigned to the intensity values - , In, I12, hi, b, I21, 122, 121. For example, in the above-mentioned manner, an assignment of the intensity values to material thicknesses, which are likewise strongly correlated with the solvent content, or a pressure in the vicinity of the belt 4 and other process parameters.
    The above-mentioned type of information extraction from the spectrum 11 represents a simple method to obtain directly from the spectrum 11 the values of corresponding process parameters. Of course, conclusions can also be drawn from spectrum 11 using quantitative methods of signal processing for the corresponding values of the process parameters.
    An actual value for a parameter of the material 8 and / or the state variable of the defined environment about the band 4 can thus be determined from the spectrum 11 and compared with a desired value. The evaluation of the spectrum 11 and the comparison with the desired values can be carried out by the controller 6, for example a suitably programmed micro or signal processor. The setpoint values can be stored in a memory (not shown here) connected to the controller 6. Depending on a deviation of the actual value from the desired value, the controller 6 can actuate the actuator 9 to change at least one of the state variables of the defined environment or a conveying speed of the belt 4. For example, the controller 6 may change the temperature at a particular point in the process via the actuator 9 or adjust the speed of the belt 4 to increase or decrease the residence time of the material 8 in the process.
    If the film 7 is a solvent-based film, evaporation of the solvent during the process results in drying and / or curing of the material 8. In this case, the current value Li, Lu, L12, L-η, L2, L21, L22, L2 of the material 8 can be recorded as the actual value at a measuring point and compared with a setpoint value.
    Through the use of a plurality of spectrometers 5, the distance between the application of the material 8 and the removal of the film 7 can be subdivided into sections, whereby each section can be assigned a spectrometer 5. Each spectrometer 5 can hereby be assigned a separate set of desired values. In this way, a possibly occurring deviation of actual values and nominal values can be spatially assigned precisely, whereby the process can be specifically intervened.
    For the sake of order, it should be pointed out that, for better understanding of the structure of the device according to the invention, these or their components have been shown partially unevenly and / or enlarged and / or reduced in size.
    The embodiment shows a possible embodiment of the method according to the invention, it being noted at this point that the invention is not limited to the specifically illustrated embodiment variant thereof. There are all embodiments that fall within the literal meaning of the independent claims covered by the scope. 10/20 N2013 / 09100
    REFERENCE SIGNS LIST 1 device 2 deflection roller 3 drive roller 4 belt 5 spectroscope 6 control 7 film 8 material 9 actuator 10 light source 11 spectrum ll, In, 112, hi, intensity values b, I21,122, bi intensity values k-ι, ki2, kiji wavenumbers k2, k22, k2i wavenumber Li, Lu, L12, Lii solvent content L2, L21, L22, L21 solvent content Ti, Ti ^ T12, Tii temperature T2, T21, T22, T21 temperature 11/20 N2013 / 09100
    权利要求:
    Claims (10)
    [1]
    1. A method for producing a film or a film (7), comprising the successive steps a) applying at least one material (8) for producing the film or the film (7) to a moving belt (4), b) at least partial curing and / or partial drying of the material (8), characterized in that during step b) by means of at least one non-invasive spectroscopic method properties of the material (8) and / or thermal state variables of a defined environment around the band (4) be recorded.
    [2]
    2. The method according to claim 1, characterized in that in step b) an infrared absorption method is used as the spectroscopic method.
    [3]
    3. Method according to claim 1, characterized in that at least one actual value for at least one parameter of the material (8) and / or the state variable of the defined environment around the band (11) is determined from a spectrum (11) detected by the spectroscopic method (11). 4) is determined and compared with at least one setpoint.
    [4]
    4. The method according to claim 3, characterized in that in response to a deviation of the actual value of the setpoint, an actuator (6) 12/20 N2013 / 09100 2 for changing at least one of the state variables of the defined environment or a conveyor speed of the band ( 4) is actuated.
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that the film or the film (7) is a solvent-based film or a solvent-based film, wherein evaporation of a solvent drying and / or curing of the material (8) result and in step b) the actual solvent content (L 1, L 2, L 2, L 2, L 2, L 2, L 2) of the material (8) is detected at at least one predefined measuring point.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that the material (8) at a first location on the tape (4) and the at least partially cured and / or dried material (8) at a second location of the Band (4) is deducted and divided between the first and the second location in sections of equal or different size and in each of the sections at predetermined time intervals parameters of the material (8) and / or state variables of the defined environment around the band (4 ).
    [7]
    7. Method according to one of claims 1 to 6, characterized in that intensity values (h, In, h2, l-π, l2, l2i, l22, l2i) of individual wavelengths or wavelength ranges in a spectrum are values for parameters of the material and / or the state variables of the defined environment around the band (4) are assigned.
    [8]
    8. The method according to any one of claims 3 to 7, characterized in that the at least one parameter of the material (8) is a thickness of the material.
    [9]
    9. The method according to any one of claims 1 to 8, characterized in that the at least one state variable of the defined environment around the 13/20 N2013 / 09100 3 band (4) an atmospheric pressure and / or temperature (T1, Tn, Ti2, T -π, T2, T21 T2i) in the defined environment.
    [10]
    10. Device (1) for carrying out the method according to one of claims to 1 to 9 for the production of a film or a film, wherein the device (1) has a band (4) with a closed surface, in particular between at least one tail pulley ( 2) and a drive drum (3) revolving endless belt, characterized in that the device (1) comprises at least one spectrometer (5), preferably an optical spectrometer, which is connected to a controller (6) of the device (5). 14/20 N2013 / 09100
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    法律状态:
    2022-01-15| MM01| Lapse because of not paying annual fees|Effective date: 20210515 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50326/2013A|AT514344B1|2013-05-15|2013-05-15|Process for producing a film or a film|ATA50326/2013A| AT514344B1|2013-05-15|2013-05-15|Process for producing a film or a film|
    CN201480027334.6A| CN105612036B|2013-05-15|2014-05-14|Method for manufacturing film or diaphragm|
    KR1020157035541A| KR102235658B1|2013-05-15|2014-05-14|Method for producing a foil or a film|
    JP2016513174A| JP6483663B2|2013-05-15|2014-05-14|Method for producing foil or film|
    PCT/AT2014/050117| WO2014183145A1|2013-05-15|2014-05-14|Method for producing a foil or a film|
    US14/782,480| US10183422B2|2013-05-15|2014-05-14|Method for producing a foil or a film|
    EP14738714.6A| EP2996854B1|2013-05-15|2014-05-14|Process for manufacturing a sheet or a film|
    TW103117212A| TWI615270B|2013-05-15|2014-05-15|Verfahren zur herstellung einer folie oder eines filmes|
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