WO2024062065A1 - Procédé de mesure de dérivés de polypropylène glycol dans un filtre en papier - Google Patents

Procédé de mesure de dérivés de polypropylène glycol dans un filtre en papier Download PDF

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Publication number
WO2024062065A1
WO2024062065A1 PCT/EP2023/076138 EP2023076138W WO2024062065A1 WO 2024062065 A1 WO2024062065 A1 WO 2024062065A1 EP 2023076138 W EP2023076138 W EP 2023076138W WO 2024062065 A1 WO2024062065 A1 WO 2024062065A1
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WO
WIPO (PCT)
Prior art keywords
ppg
resonance
determined
microwave
filter
Prior art date
Application number
PCT/EP2023/076138
Other languages
German (de)
English (en)
Inventor
Udo Schlemm
Hendrik Richter
Original Assignee
TEWS Elektronik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TEWS Elektronik GmbH filed Critical TEWS Elektronik GmbH
Publication of WO2024062065A1 publication Critical patent/WO2024062065A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
    • G01N22/04—Investigating moisture content
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
    • A24C5/34—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes
    • A24C5/3412—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes by means of light, radiation or electrostatic fields

Definitions

  • the present invention relates to a method for measuring polypropylene glycol derivatives (PPG) in a paper filter.
  • PPG polypropylene glycol derivatives
  • a method for determining the proportion of at least one additive in a tobacco-containing substance has become known.
  • information is obtained from the electrical interaction with the tobacco-containing substance using at least a first alternating electromagnetic field with a first measurement frequency and a second alternating electromagnetic field with a second measurement frequency that is different from the first measurement frequency.
  • two independent measured variables are evaluated at each of the two measuring frequencies and obtained from the four measured variables to determine the material moisture, the tobacco content and the proportion of at least one additive.
  • the disadvantage of the known method is that with the total of four measured values, in addition to determining the additive and the moisture, the tobacco content is also necessarily determined.
  • the tobacco paper also contains additives such as glycerin and possibly other aerosol-forming additives, water, binders, flavorings and tobacco, no information was provided on the water and glycerin content. Overall, the four measurement variables are treated equally in order to determine three or four variables for the tobacco-containing substance to be measured. This leads to inaccurate values.
  • Paper filters can be used as a replacement for filters made of cellulose acetate, and their environmental impact is significantly better because they are biodegradable more quickly and are also cheaper to produce than acetate filters.
  • paper filters have retention properties that do not correspond to those of acetate filters; in particular, the filter behavior for substances such as tar and water or water vapor is different compared to acetate filters. These changed filter properties also change the taste of cigarette smoke in an undesirable way.
  • PPG polypropylene derivatives
  • PPG polypropylene glycol glyceryl ether
  • the invention is based on the object of providing a method for measuring polypropylene glycol derivatives (PPG) in a paper filter, which determines a percentage content (g) of PPG in the paper filter using the simplest possible means.
  • PPG polypropylene glycol derivatives
  • the task is solved by a method with the features of claim 1.
  • the subjects of the subclaims form an advantageous embodiment.
  • the method according to the invention is intended and intended for measuring polypropylene glycol derivatives (PPG) in a paper filter.
  • PPG polypropylene glycol derivatives
  • at least one microwave resonator is used, which is designed to measure two microwave quantities with two resonance modes. There are therefore a total of four measured microwave quantities, two of which are one in each case Resonance mode belongs.
  • the method is characterized in that a density-independent parameter of the corresponding resonance mode is determined for each resonance mode from the respective microwave quantities of the resonance mode. These density-independent parameters are used to determine the percentage content g of PPG in the paper filter.
  • the evaluation takes place within the respective resonance mode in a first step. Only after this evaluation are two parameters of the modes evaluated together for a percentage content of PPG. This significantly improves the measurement accuracy.
  • the humidity is also determined from the density-independent parameter.
  • the resonance mode with the higher resonance frequency is used because PPG has a significantly lower relaxation frequency than water. Therefore, the resonance mode with the higher resonance frequency is particularly suitable for determining the humidity from the density-independent parameter.
  • the total mass of the paper filter is determined from the two microwave sizes of the resonance mode with the higher resonance frequency.
  • the total mass determined in this way can be used to determine the mass of PPG per unit length in the paper filter.
  • the total mass and the percentage content (g) of PPG are taken into account.
  • the lower frequency is less than 1.5 GHz, preferably less than 1 GHz.
  • the clear distances between lower and higher resonance frequencies take into account that PPG has a significantly lower relaxation frequency than water
  • a cylindrical cavity resonator is provided as the microwave resonator.
  • the paper filter to be measured is moved as a filter rod along the longitudinal axis of the cylinder through the cavity resonator.
  • the resonance chamber of the resonator is designed such that the field expansion in the transport device for both modes is significantly smaller than the total length of the filter.
  • the small field expansion in the transport direction also allows a profile of the filter to be recorded in the longitudinal direction.
  • Figure 1 is a schematic view of a cylindrical cavity resonator with a filter rod
  • Figure 2 A-D shows the Eoio, E020, E030 and E040 modes for the field distribution and field strength perpendicular to the cylinder axis
  • Figure 3 exemplary values for the density-independent parameters at high and low moisture content
  • Figure 4 shows the results of the PPG content in the measurement according to the invention compared to reference values.
  • Figure 1 shows a schematically very simplified view of a cylindrical cavity resonator 1, which has a central opening 4.
  • a filter rod 2 is moved in direction 3 through the cavity resonator.
  • the measurement is carried out in the cylindrical cavity resonator 1, which has two modes for the suitable frequency ranges.
  • the resonator has the following properties: the spatial resolution of the resonator must be as large as possible, ie the extent of the measuring field is as small as possible compared to the position of the filter rod,
  • the measuring field should be as homogeneous as possible across the cross section of the filter rod.
  • a cylindrical cavity resonator is used for the measurement, the measuring field of which has as small an extent as possible in the direction of the cylinder axis of the filter rod and which can be operated in two Eoxo modes, one of which is in the frequency range from 0.5 GHz to 1.5 GHz and the other in a frequency range of 5 GHz to 6.5 GHz.
  • Figure 2a shows the course of the electric field strength perpendicular to the longitudinal axis of the cylinder. It can be clearly seen that there is a central field strength maximum that is circularly symmetrical with respect to the cylinder axis.
  • the mode E020 is shown in Figure 2b, here there is a secondary maximum in the radial direction, which extends circularly symmetrically over the cylindrical resonator cavity.
  • Figure 2c shows the resonance mode E030, which has two secondary maxima.
  • Figure 2d shows the E040 mode, with three secondary maxima.
  • the advantage of using these modes is that there is a field strength maximum localized in the center of the cavity resonator, which provides a relatively homogeneous measuring range.
  • Figure 3a shows the course of the parameter ⁇ t> at the lower resonance frequency of 0.9 GHz with the light triangles and the solid circles. The measured values are plotted against the percentage content g of PPG.
  • Fig. 3a shows that the density-independent parameter is strongly dependent on the moisture, but is only weakly dependent on the PPG content in the range from 0 to approx. 30%. This is due to two effects with opposite effects: On the one hand, adding PPG as an oily liquid lowers the percentage moisture content, and on the other hand, at this frequency the PPG molecules are polarized.
  • Figure 3b shows the parameters at low and high humidity values for a resonance frequency of 6 GHz. This shows a relatively significant decrease in the parameter as the PPG content increases. This behavior indicates the dielectric properties of PPG. With freshly applied PPG, the measured parameter decreases in the higher frequency range of the microwaves as the PPG content increases. PPG has oily properties and does not contain water. On behalf of PPG, the total mass is therefore increased and at the same time the total moisture is reduced. This behavior is shown in Figure 3b. In this high frequency range there is no polarization of the PPG molecules.
  • the measured values for the percentage PPG content plotted in Figure 4 result from the parameters in Figures 3a and 3b, the measured values being plotted against reference values.
  • the linear relationship shows the accuracy with which the actual PPG content can be measured in percent.
  • the measurement uses a cavity resonator that has two resonance modes for the appropriate resonance frequencies.
  • some 100 MHz and 5-6 GHz are well suited resonance frequencies for measuring PPG and water.
  • the spatial resolution of the resonator should be chosen to be as large as possible so that the measurement of a profile of PPG and water in the filter rod is possible.
  • the spatial resolution for the Eoxo modes described above is independent of the field distribution.
  • the resonance frequencies are almost exclusively determined by the diameter of the cylindrical resonator.
  • the spatial resolution is determined by the structural height of the resonance chamber.
  • the quantities A denotes the value by which the resonance frequency of the respective mode changes in the presence of the paper filter to be measured.
  • the second quantity B determined by the microwave measurement refers to the attenuation of the microwave resonance in the resonator, for example the change in the half-width of the resonance curve.
  • the density-independent parameter QL is determined from the variables AL and BL. For this purpose, for example, the quotient of the resonance frequency shift AL and the broadening BL of the resonance curve is selected. It is also possible, for example, to use the arc tangent of the quotient in order to determine a density-independent parameter.
  • the PPG content (g) is determined without an additional determination of the material moisture u.
  • the material moisture u can be determined using the density-independent parameter H for the larger resonance frequency.
  • the moisture u is calculated as follows: where ai, a2 are calibration coefficients.
  • the measurement of moisture u and PPG content g are carried out independently of the mass of the paper filter.
  • the mass per unit length of PPG and the measurement of the total PPG mass can also be done accordingly. Since the percentage of PPG in g is known, the total PPG mass mppG is calculated using the following relationship:
  • the measurement to determine PPG should be carried out promptly after the filter rods have been manufactured. PPG does not react with the paper filter, however the PPG content can change over time due to evaporation. The measurement should therefore, if possible, be carried out within the first 15 minutes after the filter rods have been manufactured.

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  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

L'invention concerne un procédé de mesure de dérivés de polypropylène glycol (PPG) dans un filtre en papier, à l'aide d'au moins un résonateur à micro-ondes qui est conçu pour mesurer deux variables de micro-ondes (AH, AL, BH, BL) à l'aide de deux modes de résonance (H, L) respectifs. L'invention est caractérisée en ce que pour chaque mode de résonance, une caractéristique indépendante de la densité (ΦL, ΦH) du mode de résonance correspondant est déterminée à partir des variables de micro-ondes (AH, AL, BH, BL) des modes de résonance, et une teneur en pourcentage (g) de PPG est déterminée à partir des deux variables de mesure indépendantes de la densité (ΦL, ΦH).
PCT/EP2023/076138 2022-09-23 2023-09-21 Procédé de mesure de dérivés de polypropylène glycol dans un filtre en papier WO2024062065A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022124459.8A DE102022124459B4 (de) 2022-09-23 2022-09-23 Verfahren zur Messung von Polypropylenglykolderivaten in einem Papierfilter
DE102022124459.8 2022-09-23

Publications (1)

Publication Number Publication Date
WO2024062065A1 true WO2024062065A1 (fr) 2024-03-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/076138 WO2024062065A1 (fr) 2022-09-23 2023-09-21 Procédé de mesure de dérivés de polypropylène glycol dans un filtre en papier

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DE (1) DE102022124459B4 (fr)
WO (1) WO2024062065A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011006414A1 (de) * 2011-03-30 2012-10-04 Hauni Maschinenbau Ag Verfahren und Vorrichtung zur Ermittlung von Gewichtsanteilen in einem Filtermaterial
US20150012228A1 (en) * 2011-10-26 2015-01-08 Tews Elektronik Gmbh & Co. Kg Method for online measurement of a plasticizer in an endless filter rod and a device for producing an endless filter rod of the tobacco processing industry
DE102015119453A1 (de) 2015-11-11 2017-05-11 Hauni Maschinenbau Gmbh Vorrichtung und Verfahren zur Bestimmung des Anteils mindestens eines Zusatzstoffs in einem tabakhaltigen Stoff, und Maschine der Tabak verarbeitenden Industrie

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006041191C5 (de) 2006-08-30 2016-08-04 Tews Elektronik Dipl.-Ing. Manfred Tews Filtermeßstabstation sowie Verfahren zur Messung der Masse eines Weichmachers in einem Filterstab
DE102021110760A1 (de) 2021-04-27 2022-10-27 Tews Elektronik Gmbh & Co. Kg Verfahren zur Messung eines Zusatzstoffgehalts in einem Tabakpapier für elektrische Zigaretten

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011006414A1 (de) * 2011-03-30 2012-10-04 Hauni Maschinenbau Ag Verfahren und Vorrichtung zur Ermittlung von Gewichtsanteilen in einem Filtermaterial
US20150012228A1 (en) * 2011-10-26 2015-01-08 Tews Elektronik Gmbh & Co. Kg Method for online measurement of a plasticizer in an endless filter rod and a device for producing an endless filter rod of the tobacco processing industry
DE102015119453A1 (de) 2015-11-11 2017-05-11 Hauni Maschinenbau Gmbh Vorrichtung und Verfahren zur Bestimmung des Anteils mindestens eines Zusatzstoffs in einem tabakhaltigen Stoff, und Maschine der Tabak verarbeitenden Industrie

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DE102022124459B4 (de) 2024-10-10
DE102022124459A1 (de) 2024-03-28

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