JP5191272B2 - Acetate tow quality measuring method, crimp level control method and control apparatus thereof - Google Patents

Acetate tow quality measuring method, crimp level control method and control apparatus thereof Download PDF

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JP5191272B2
JP5191272B2 JP2008128170A JP2008128170A JP5191272B2 JP 5191272 B2 JP5191272 B2 JP 5191272B2 JP 2008128170 A JP2008128170 A JP 2008128170A JP 2008128170 A JP2008128170 A JP 2008128170A JP 5191272 B2 JP5191272 B2 JP 5191272B2
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acetate tow
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JP2009275314A (en
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孝雄 三栖
勲 大木
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Toyama Filter Tow Co Ltd
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Description

本発明は、アセテートトウの捲縮レベルを連続的に測定し、規格の捲縮レベルを満たすためのアセテートトウの品質測定方法と、その捲縮レベルの制御方法及び制御装置に関する。   The present invention relates to a method for measuring the quality of acetate tow for continuously measuring the crimp level of acetate tow and satisfying the standard crimp level, and a control method and control device for the crimp level.

一般に、タバコフィルターに使用されるアセテートトウ製品は、フィルターの通気抵抗値が品質上最も重要なファクターとなる。製品に付与する捲縮レベルは様々な要因で変動することから、定期的に抜き取り試験を行い捲縮レベルが規格範囲内にあるかを確認し、規格範囲を超えた場合、捲縮付与設備のクリンプ圧力を調整することで規格範囲に捲縮を合わせる手法が採られる。   In general, for acetate tow products used for tobacco filters, the ventilation resistance value of the filter is the most important factor in quality. Since the crimp level given to products varies depending on various factors, periodic sampling tests are conducted to check whether the crimp level is within the standard range. A method is adopted in which crimp is adjusted to the standard range by adjusting the crimp pressure.

しかし、前記評価方法ではアセテートトウ製造工場の生産量に対して、一部の評価しかできず、製品の大部分の品質を保障することができない。更に測定には抜き取り試験によるサンプリングから作業者による手分析までの工程が必要なことから労力と測定結果が出るまでの時間によるロスが発生する。また、クリンプ設備の圧力調整の操作もオペレータの勘に頼らざるを得ず判断を誤れば更に労力とロスの増加に繋がる。   However, the evaluation method can only evaluate a part of the production amount of the acetate tow manufacturing plant, and cannot guarantee the quality of most products. Furthermore, since the measurement requires a process from sampling by sampling test to manual analysis by the operator, loss due to labor and time until the measurement result is obtained occurs. Further, the operation of adjusting the pressure of the crimp equipment must be relied on the operator's intuition, and if the judgment is wrong, the labor and loss are further increased.

また、例えば特開平５−１３２８５２号公報（特許文献１）に記載された糸条の捲縮特性測定装置によれば、CCD 等のラインセンサーからなる読取部を台紙上に固定した試料糸の長手方向及び糸横断方向に向けて移動させながら、試料糸のパターンデータを読み取る。演算部において、パターンデータの変化分の方向を検出して、山または谷を識別し、その数を計数して捲縮数を演算する。データ間の距離を順次積算することにより、パターン長を演算し、糸条長手方向である副走査方向の所定長さにおけるパターン長から、捲縮率を演算する。
特開平５−１３２８５２号公報 Further, according to the device for measuring the crimp characteristics of a yarn described in, for example, Japanese Patent Laid-Open No. 5-132852 (Patent Document 1), the length of a sample yarn in which a reading unit composed of a line sensor such as a CCD is fixed on a mount. The pattern data of the sample yarn is read while moving in the direction and the crossing direction of the yarn. In the calculation unit, the direction of change in the pattern data is detected, peaks or valleys are identified, the number is counted, and the number of crimps is calculated. The pattern length is calculated by sequentially integrating the distances between the data, and the crimp rate is calculated from the pattern length at a predetermined length in the sub-scanning direction that is the yarn longitudinal direction.
JP-A-5-132852

上述のように、特許文献１に記載された２次元画像のデジタル化による糸条の捲縮評価は、光を照射し捲縮の山谷により発生する明暗の情報から演算しているが、この手法ではアセテートトウのように捲縮の山谷の形状が不安定な合成繊維にとっては正確な評価が困難である可能性が高い。更に、特許文献１による糸条の捲縮評価は、試料糸を台紙上に固定した上で、台紙と読取部とを相対移動させて上述の評価を行うため、全自動化は難しく、特に糸条の製造工程において連続測定することが不可能である。   As described above, the evaluation of the crimp of the yarn by digitizing the two-dimensional image described in Patent Document 1 is calculated from light and dark information generated by light and the valleys of the crimp. Then, it is highly possible that accurate evaluation is difficult for synthetic fibers in which the shape of the crimped valley such as acetate tow is unstable. Furthermore, in the evaluation of the crimp of the yarn according to Patent Document 1, the sample yarn is fixed on the mount and the above-mentioned evaluation is performed by relatively moving the mount and the reading unit. In this manufacturing process, continuous measurement is impossible.

本発明は、かかる従来技術の問題点を解決するものであって、生産中のアセテートトウの密度量をオンラインで測定し、その密度量から、繊維帯の捲縮レベルを連続的に判定評価することを目的の一つとしている。更に、その判定情報をもとに、クリンプ設備の圧力条件を自動的に変更し、結果としてアセテートトウの強力値を規格の範囲内に維持して、安定した品質の製品を得ることを他の目的としている。   The present invention solves such problems of the prior art, and measures the density amount of acetate tow during production online, and continuously determines and evaluates the crimp level of the fiber band from the density amount. This is one of the purposes. Furthermore, based on the judgment information, the pressure condition of the crimping equipment is automatically changed, and as a result, the strength value of acetate tow is maintained within the standard range, and other products can be obtained with stable quality. It is aimed.

かかる目的を達成するため、本発明の第１の基本構成は、近赤外線分光光度計の参照波長を１７７０ｎｍ、測定波長を２２２０ｎｍとし、さらに２３００ｎｍで正規化すること、アセテートトウに近赤外線を照射して、近赤外線分光光度計により前記各波長の吸光度からアセテートトウの近赤外線減衰率を測定し、前記減衰率から密度量を演算すること、及び得られる前記密度量から繊維帯の捲縮レベルを判定することを含んでなるアセテートトウの品質測定方法にある。   In order to achieve this object, the first basic configuration of the present invention is that the near-infrared spectrophotometer has a reference wavelength of 1770 nm, a measurement wavelength of 2220 nm, and is further normalized at 2300 nm. Then, the near-infrared attenuation rate of acetate tow is measured from the absorbance of each wavelength by a near-infrared spectrophotometer, the density amount is calculated from the attenuation rate, and the crimp level of the fiber band is calculated from the obtained density amount. A method for measuring the quality of acetate tow comprising determining.

また、第２の基本構成は、前記品質測定方法により得られる捲縮レベルが規格のレベルから外れたとき、捲縮付与装置の捲縮ローラ圧を調整することを含むアセテートトウの捲縮レベルの制御方法である。また、第３の基本構成は、前記品質測定方法により得られる繊維の強力値が規格の範囲から外れたとき、クリンプ装置の捲縮ローラ圧を調整することを含むアセテートトウの捲縮レベルの制御方法である。第２及び第３の基本構成を備えたアセテートトウの捲縮レベルの制御方法発明における、前記捲縮レベルをオンラインにより連続制御することを含んでいる。   Further, the second basic configuration is that the crimping level of acetate tow includes adjusting the crimping roller pressure of the crimping device when the crimping level obtained by the quality measuring method deviates from the standard level. It is a control method. The third basic configuration is the control of the crimp level of acetate tow, including adjusting the crimp roller pressure of the crimping device when the fiber strength value obtained by the quality measuring method is out of the standard range. Is the method. In the invention of a method for controlling a crimped level of acetate tow having the second and third basic configurations, the crimp level is continuously controlled online.

更に本発明の第４の基本構成は、前述の制御方法を実施するための装置であって、捲縮付与装置及び乾燥機を経て連続移動するアセテートトウの密度量を演算する密度量演算手段と、当該密度量演算手段による演算結果に基づき前記繊維の強力値を演算する強力値演算手段と、当該強力値演算手段による演算結果を表示する表示手段とを備え、前記密度量演算手段は近赤外線分光光度計を含んでなり、当該近赤外線分光光度計は、近赤外線光源、光源照射部、特定波長を透過するフィルターを有する分光部、測光部、信号処理部、及びアセテートトウの近赤外線減衰率演算部を含むデータ処理部を有し、前記特定波長が、１７７０ｎｍの参照波長、２２２０ｎｍの測定波長、及び２３００ｎｍで正規化された波長であり、前記密度量演算手段は前記近赤外線減衰率演算部にて演算された近赤外線減衰率からアセテートトウの密度量を演算し、前記強力値演算手段は、アセテートの密度量と強力値との相関から予め作成した相関回帰式に基づき、前記強力値を前記密度量演算部により演算された密度量から演算し、その演算結果を出力部から強力値として上記表示手段に出力して表示する。   Further, a fourth basic configuration of the present invention is an apparatus for carrying out the above-described control method, and a density amount calculating means for calculating the density amount of acetate tow that continuously moves through the crimping device and the dryer. , A strong value calculating means for calculating the strong value of the fiber based on the calculation result by the density amount calculating means, and a display means for displaying the calculation result by the strong value calculating means. The near-infrared spectrophotometer includes a near-infrared light source, a light source irradiation unit, a spectroscopic unit having a filter that transmits a specific wavelength, a photometry unit, a signal processing unit, and the near-infrared attenuation rate of acetate tow A data processing unit including a calculation unit, wherein the specific wavelength is a reference wavelength of 1770 nm, a measurement wavelength of 2220 nm, and a wavelength normalized by 2300 nm, and the density amount calculation unit The density amount of acetate tow is calculated from the near-infrared attenuation rate calculated by the near-infrared attenuation rate calculation unit, and the strong value calculation means is a correlation regression formula created in advance from the correlation between the density amount of acetate and the strong value Based on the above, the strong value is calculated from the density amount calculated by the density amount calculation unit, and the calculation result is output as a strong value from the output unit to the display means for display.

近赤外線領域のうち、参照波長、測定波長及び正規化波長の３波長を、１７７０ｎｍ、２２２０ｎｍ及び２３００ｎｍの３つの特定領域に選択することにより、外乱の影響を受けにくくしている。また、近赤外線は物体内部に侵入し減衰した拡散反射光を測定するため、形状に関係なく高精度の測定が可能となる。更に本発明にあっては、アセテートトウの密度量と繊維の強力値との間の相関回帰式を予め設定しておき、その相関回帰式を利用して上記測定密度量から前記強力値を演算し、その値を表示し、或いはその値と規格レベルとを比較して、強力値、すなわちアセテートトウの捲縮レベルを規格レベル内に納まるように、クリンプ装置の捲縮付与圧力をアセテートトウの製造工程において連続調整し、一定の捲縮レベルを維持する高品質のアセテートトウを連続して製造する。   By selecting three reference wavelengths of 1770 nm, 2220 nm, and 2300 nm among the reference wavelength, measurement wavelength, and normalized wavelength in the near infrared region, the influence of disturbance is reduced. In addition, near-infrared rays measure diffusely reflected light that has entered and attenuated inside the object, so that high-precision measurement is possible regardless of the shape. Furthermore, in the present invention, a correlation regression equation between the density amount of acetate tow and the fiber strength value is set in advance, and the strength value is calculated from the measured density amount using the correlation regression equation. The crimping pressure of the crimping device is adjusted to that of acetate tow so that the strength value, that is, the crimp level of acetate tow is within the standard level, is displayed or compared with the standard level. A high quality acetate tow is continuously produced which is continuously adjusted in the production process and maintains a constant crimp level.

図１は本発明の捲縮付与工程及び密度量測定工程の一例を示す工程説明図である。
本実施形態によれば、捲縮付与装置２を経て捲縮が付与された連続走行するアセテートトウ１を乾燥機３により乾燥したのち、その密度を密度量測定装置４にて測定し、得られた密度量をもとに捲縮レベルを判定する。 FIG. 1 is a process explanatory view showing an example of a crimping process and a density measuring process of the present invention.
According to this embodiment, after the acetate tow 1 continuously running with crimps applied through the crimping device 2 is dried by the dryer 3, the density is measured by the density measuring device 4 and obtained. The crimp level is determined based on the density.

密度量の測定装置４としては、走行中のアセテートトウ１に非接触で測定が可能な装置であることが好ましく、測定精度の点から近赤外線分光光度計を採用することが望ましい。近赤外線分光光度計による測定には、一般的に透過法、拡散反射法又は透過反射法の３種類の測定法の何れかが採用されている。図１に示す実施形態では拡散反射法を採用しているが、他の測定法を採用することもできる。   The density amount measuring device 4 is preferably a device that can measure the acetate tow 1 while traveling without contact, and it is desirable to employ a near-infrared spectrophotometer from the viewpoint of measurement accuracy. For the measurement by the near-infrared spectrophotometer, generally, any one of the three types of measurement methods of the transmission method, the diffuse reflection method, and the transmission reflection method is employed. In the embodiment shown in FIG. 1, the diffuse reflection method is adopted, but other measurement methods can also be adopted.

図示実施形態にて採用する密度量測定装置４としての近赤外線分光光度計を、図２に基づいて簡単に説明すると、近赤外線分光光度計は、近赤外線光源部４１、同光源部４１からの光路上に配され、所望の波長域の近赤外線を選択的に透過させる分光部４２、同分光部４２を通って透過する近赤外線を被測定対象に照射する照射部４３、照射光の反射光の光量を測定する測光部４４、測光部４４で検出された光信号を電気信号へと変換して出力する信号処理部４５、信号処理部４５から出力される電気信号を必要な演算を行い各種のデータ処理を行うデータ処理部４６、及びこのデータ処理部４６にて処理された各種情報を出力表示する表示部５に出力する出力部４７を備えている。   The near-infrared spectrophotometer as the density measuring device 4 employed in the illustrated embodiment will be briefly described with reference to FIG. 2. The near-infrared spectrophotometer is obtained from the near-infrared light source unit 41 and the light source unit 41. A spectroscopic unit 42 that is arranged on the optical path and selectively transmits near-infrared rays in a desired wavelength range, an irradiation unit 43 that irradiates the measurement target with near-infrared rays that pass through the spectroscopic unit 42, and reflected light of the irradiation light Metering unit 44 for measuring the amount of light, a signal processing unit 45 for converting the optical signal detected by the metering unit 44 into an electrical signal, and outputting the electrical signal from the signal processing unit 45 to perform various calculations. And a data processing unit 46 that performs the data processing, and an output unit 47 that outputs various information processed by the data processing unit 46 to the display unit 5 that outputs and displays the information.

本実施形態では、図１に示すように、前記照射部４３には捲縮付与装置２を経てクリンプ処理された被測定対象であるアセテートトウ１を連続的に走行させる。アセテートトウ自身が広い範囲で放射する反射光強度Ｉとアセテートトウの表面などで反射する反射光強度Ｉrとの比を反射率Ｒとして表す。近赤外光はアセテートトウの所要深さまで侵入し、その過程で透過、屈折、反射、散乱を繰り返して拡散する。その拡散光の一部は再びトウ表面から放射され、測光部４４にて捕捉される。反射率Ｒの逆数の対数が拡散反射吸光度Ａとなり、これが本発明における減衰率に相当する。
ここで、R ＝Ｉ／Ｉr （Ｉはアセテートトウから拡散反射する反射光強度、Ｉrはアセテートトウからの反射光強度）、Ａ＝log(1/R)＝log(Ｉr/ I ) である。 In the present embodiment, as shown in FIG. 1, acetate tow 1, which is a measurement target crimped through the crimping device 2, is continuously run through the irradiation unit 43. The ratio of the reflected light intensity I emitted by the acetate tow itself over a wide range to the reflected light intensity Ir reflected by the surface of the acetate tow is expressed as a reflectance R. Near-infrared light penetrates to the required depth of acetate tow and diffuses through repeated transmission, refraction, reflection and scattering in the process. A part of the diffused light is emitted again from the toe surface and is captured by the photometry unit 44. The logarithm of the reciprocal of reflectance R is diffuse reflection absorbance A, which corresponds to the attenuation factor in the present invention.
Where R = I / Ir (I is the intensity of reflected light diffusely reflected from acetate tow, Ir is the intensity of reflected light from acetate tow), A = log (1 / R) = log (Ir / I).

前記測定装置４は、アセテートトウの製造工程においては、捲縮付与工程に続く乾燥工程から梱包工程までの間であれば、任意の位置に設置してよい。
なお本発明では、測定装置４で測定して得られた測定値に基づき、捲縮付与装置２の圧力条件を制御することが必要であるが、空気圧を使用する捲縮付与装置２を用い、該捲縮付与装置２に供給される空気の供給圧力を制御することが好ましい。 In the manufacturing process of acetate tow, the measuring device 4 may be installed at any position as long as it is from the drying process to the packing process following the crimping process.
In the present invention, it is necessary to control the pressure condition of the crimp applying device 2 based on the measurement value obtained by measuring with the measuring device 4, but the crimp applying device 2 using air pressure is used. It is preferable to control the supply pressure of the air supplied to the crimp imparting device 2.

さらに本発明のアセテートトウの捲縮制御方法では、アセテートトウを乾燥工程から梱包工程まで連続して搬送する際に、走行するアセテートトウの強力値を測定し、得られた強力値をもとに、捲縮付与工程における圧力条件を変更することが必要である。   Furthermore, in the crimp control method for acetate tow according to the present invention, when the acetate tow is continuously conveyed from the drying process to the packing process, the strength value of the running acetate tow is measured, and the obtained strength value is used as a basis. It is necessary to change the pressure conditions in the crimping step.

本発明では、走行するアセテートトウの強力値をオンラインで測定した強力値をもとに、捲縮付与工程における圧力条件を変更するため、強力値の変動に対し迅速に対応が可能であり、安定した強力値の制御が可能となる。
また、走行するアセテートトウ１の強力値の測定は、近赤外線分光光度計を用いて非接触で行うことが、トウの走行安定性、品質保持の点から好ましい。 In the present invention, since the pressure condition in the crimping process is changed based on the strength value obtained by measuring the strength value of the running acetate tow on-line, it is possible to respond quickly to fluctuations in the strength value, and it is stable. It is possible to control the strong value.
In addition, the measurement of the strength value of the running acetate tow 1 is preferably performed in a non-contact manner using a near infrared spectrophotometer from the viewpoint of running stability and quality maintenance of the tow.

一般に近赤外線と呼ばれる波長は１１００ｎｍ〜２５００ｎｍの波長領域であり、この近赤外線領域にある全ての光をトウに照射し、アセテートトウの密度に相当する吸光度情報をコンピューターで処理することによって強力値を求める方法であっても良いが、この方法は幅広い波長領域の情報を処理するにふさわしいコンピューターを使用する必要があることから、一般に装置が複雑且つ非常に高価となる。   Generally, the wavelength called near infrared ray is a wavelength region of 1100 nm to 2500 nm. Tow is irradiated with all the light in this near infrared region, and the absorbance value corresponding to the density of acetate tow is processed by a computer to obtain a strong value. This method may be a desired method, but since this method requires the use of a computer suitable for processing information in a wide wavelength range, the apparatus is generally complicated and very expensive.

このため、近赤外線をアセテートトウに照射するヘッド部に任意の波長のみを選択して透過する光学フィルターを設置し、所定の波長の近赤外線のみを透過させて、走行するアセテートに向けて照射することにより、吸光度を処理、演算するコンピュータの構成を単純化することが望ましい。この際、波長の選択には外乱が少ない波長域を選択することが望ましい。   For this reason, an optical filter that selects and transmits only an arbitrary wavelength is installed in the head portion that irradiates the acetate tow with near infrared rays, and transmits only near infrared rays of a predetermined wavelength to irradiate the traveling acetate. Therefore, it is desirable to simplify the configuration of the computer that processes and calculates the absorbance. At this time, it is desirable to select a wavelength region with less disturbance for wavelength selection.

アセテートトウの密度変化は１５００ｎｍ〜２５００ｎｍでほぼ類似の変化傾向が見られることから、この間の波長であればいずれの波長でも選定は可能である。しかし、１９４０ｎｍ近辺は対水分感度が高く、２３００ｎｍより長波長側は基本吸収の影響が出始めることから、このような外乱を受けない波長を選択することが望ましい。そのため、外乱の影響を受けにくい適正域を検討した結果、本発明では選択する波長領域を、１７７０ｎｍ、２２２０ｎｍ、２３００ｎｍの３つの波長とし、測定波長を２２２０ｎｍ、それに対して、リファレンス（参照）波長を１７７０ｎｍ、更に正規化波長を２３００ｎｍの波長に設定した。   Since the density change of acetate tow shows a substantially similar change tendency at 1500 nm to 2500 nm, any wavelength within this range can be selected. However, the sensitivity to moisture is high in the vicinity of 1940 nm, and the influence of fundamental absorption begins to appear on the longer wavelength side than 2300 nm. Therefore, it is desirable to select a wavelength that is not subject to such disturbance. Therefore, as a result of examining an appropriate range that is not easily affected by disturbances, in the present invention, the wavelength range to be selected is three wavelengths of 1770 nm, 2220 nm, and 2300 nm, the measurement wavelength is 2220 nm, and the reference (reference) wavelength is The wavelength was set to 1770 nm and the normalized wavelength was 2300 nm.

本発明にあっては、測定波長（２２２０ｎｍ）、参照波長（１７７０ｎｍ）及び正規化波長（２３００ｎｍ）ごとの反射光強度ｖ１、ｖ０、ｖ２を測定し、データ処理部４６にて参照波長の反射光強度ｖ０に対する測定波長及び正規化波長の反射光強度ｖ１及びｖ２の各比ｖ１／ｖ０、ｖ２／ｖ０を求め、更にその逆数の対数である吸光度ｌｎ（ｖ０／ｖ１）及び吸光度ｌｎ（ｖ０／ｖ２）を演算して、測定波長の吸光度を補正している。   In the present invention, the reflected light intensities v1, v0, v2 are measured for each of the measurement wavelength (2220 nm), the reference wavelength (1770 nm), and the normalized wavelength (2300 nm), and the data processor 46 reflects the reflected light of the reference wavelength. The ratios v1 / v0 and v2 / v0 of the reflected light intensities v1 and v2 of the measured wavelength and the normalized wavelength with respect to the intensity v0 are obtained, and the absorbance ln (v0 / v1) and the absorbance ln (v0 / v2) are logarithms of the reciprocals thereof. ) Is calculated to correct the absorbance at the measurement wavelength.

すなわち、測定波長の吸光度を、参照波長及び正規化波長の測定時の各吸光度を使って次式（１）をもって補正する。
Ｘ＝ｌｎ（ｖ０／ｖ１）/ ｌｎ（ｖ０／ｖ２）・・・（１）
ここで、Ｘは補正吸光度であり、ｖ０は参照波長の反射光強度、ｖ１は測定波長の反射光強度、ｖ２は正規化波長の反射光強度を示す。
式（１）から得られる補正吸光度Ｘから測定波長の吸光度減衰率を算出する。この減衰率とアセテートトウの密度との間には所定の相関のあることが知られている。更に、アセテートトウの密度と捲縮付与レベルとの間にも相関のあることが知られている。なお、本実施形態にあって、上記近赤外線分光光度計には、本発明の制御部としてマイクロコンピュータ４９が内蔵されており、上記信号処理部４５、データ処理部４６及び出力部４７は同コンピュータ４９に設けられている。アセテートトウ１の前記吸光度減衰率及び密度量は前記データ処理部４６の減衰率演算部４６ａ及び密度量演算部４６ｂにてそれぞれ演算され、捲縮付与レベルを評価することができる。 That is, the absorbance at the measurement wavelength is corrected by the following equation (1) using each absorbance at the time of measuring the reference wavelength and the normalized wavelength.
X = ln (v0 / v1) / ln (v0 / v2) (1)
Here, X is the corrected absorbance, v0 is the reflected light intensity at the reference wavelength, v1 is the reflected light intensity at the measurement wavelength, and v2 is the reflected light intensity at the normalized wavelength.
The absorbance decay rate at the measurement wavelength is calculated from the corrected absorbance X obtained from Equation (1). It is known that there is a predetermined correlation between the attenuation rate and the density of acetate tow. Further, it is known that there is a correlation between the density of acetate tow and the level of crimping. In the present embodiment, the near-infrared spectrophotometer incorporates a microcomputer 49 as a control unit of the present invention, and the signal processing unit 45, the data processing unit 46, and the output unit 47 are included in the computer. 49. The absorbance decay rate and density amount of the acetate tow 1 are respectively calculated by the attenuation rate calculation unit 46a and the density amount calculation unit 46b of the data processing unit 46, and the crimp application level can be evaluated.

この際、捲縮レベルは一般の指標が破断強度である強力値で評価されることから、例えば前記コンピュータの記憶部４６ｃに密度と強力値との相関回帰式（Ｙ＝ａＸ＋ｂ、Ｙ＝ａＸ2＋ｂＸ＋ｃ等）を予め設定して記憶させておき、この相関回帰式を使ってデータ処理部４６の強力値演算部４６ｄにて強力値を求め、捲縮付与レベルを評価する。ここで、Ｙは強力値、Ｘは補正吸光度比を示す。なお、繊維の強力値を演算する際は近赤外線分光光度計の測光部４４をモニタリングする前記コンピュータ４９の上記記憶部４６ｃに前記相関回帰式を予め記憶させておき、その相関回帰式に基づき演算することが望ましい。この相関回帰式に基づき演算された値を強力値として表示部５に出力し、例えばぺーパ上に記録し、或いはディスプレイ上に表示する。 At this time, the crimp level is evaluated by a strong value whose general index is a breaking strength. For example, a correlation regression equation (Y = aX + b, Y = aX 2 ) between the density and the strong value is stored in the storage unit 46c of the computer. + BX + c and the like) are set in advance and stored, and a strong value is obtained by the strong value calculation unit 46d of the data processing unit 46 using this correlation regression equation, and the crimping imparting level is evaluated. Here, Y represents a strong value, and X represents a corrected absorbance ratio. When calculating the fiber strength value, the correlation regression equation is stored in advance in the storage unit 46c of the computer 49 that monitors the photometry unit 44 of the near-infrared spectrophotometer, and the calculation is performed based on the correlation regression equation. It is desirable to do. A value calculated based on this correlation regression equation is output as a strong value to the display unit 5 and recorded on a paper, for example, or displayed on a display.

また、こうして表示部５に演算して得られた強力値を単に表示するだけでもよいが、本発明にあっては、捲縮付与装置２を経て走行するアセテートトウ１に上述のような所定の波長域にある近赤外線を連続して分光照射するとともに、走行するアセテートトウ１の密度、すなわち強力値をデータ処理部４６の前記強力値演算部４６ｄにて演算する。その演算して得られる強力値を、前記記憶部４６ｃに予め記憶されている強力値の規格範囲と比較して、演算して得られた強力値が規格範囲から外れたとき、捲縮付与装置２に捲縮量を変更する制御信号が出力され、例えば空気圧を利用する捲縮付与装置２の空気供給圧を連続して制御する。   Further, the strength value obtained by the calculation on the display unit 5 may be simply displayed. However, in the present invention, the acetate tow 1 traveling through the crimp imparting device 2 has the predetermined value as described above. The near-infrared ray in the wavelength range is continuously spectrally irradiated, and the density, that is, the intensity value of the running acetate tow 1 is calculated by the intensity value calculation unit 46d of the data processing unit 46. When the strong value obtained by the calculation is compared with the standard range of the strong value stored in advance in the storage unit 46c and the strong value obtained by the calculation is out of the standard range, the crimp imparting device 2, a control signal for changing the amount of crimp is output, and for example, the air supply pressure of the crimp applying device 2 using air pressure is continuously controlled.

以下、本発明の代表的な実施例に基づいて本発明を更に具体的に説明する。
（実施例１）
１フィラメントあたりの繊度：１．９デシテックス、トウ繊度：４４０００デシテックス、目標強力値：２００Ｎのアセテートトウを捲縮付与装置２の圧力条件を変更することで強力値１８０〜３８０Ｎ程度のトウを作成した。このトウをサンプリングし、オフラインの状態で密度量測定装置４を用いて吸光度の測定を行った。次に、そのサンプルを破断強力試験し、相関性を求めた結果を表１に示す。密度量測定装置４である近赤外線分光光度計（ＮＩＲＳ）にはジェイティエンジニアリング社製のＪＥ−７０Ｎ型を使用した。任意の光学フィルターにより１７７０ｎｍと２２２０ｎｍと２３００ｎｍの３波長の吸光度を選択的に測定し、参照波長１７７０ｎｍの吸光度に対する測定波長である２２２０ｎｍの吸光度の比率を求め、更に２３００ｎｍで正規化した吸光度と破断強力試験の値の相関性を調査した。この結果、相関係数０．９９となった。 Hereinafter, the present invention will be described more specifically based on representative examples of the present invention.
Example 1
Fineness per filament: 1.9 dtex, tow fineness: 44000 dtex, target strength value: 200 N acetate tow A tow having a strength value of about 180 to 380 N was prepared by changing the pressure condition of the crimping device 2. . The tow was sampled and the absorbance was measured using the density measuring device 4 in an off-line state. Next, Table 1 shows the results of the fracture strength test of the sample and the correlation obtained. The near-infrared spectrophotometer (NIRS) that is the density measuring device 4 was a JE-70N type manufactured by JTE Engineering. Absorbance at three wavelengths of 1770 nm, 2220 nm, and 2300 nm is selectively measured with an optional optical filter, the ratio of the absorbance at 2220 nm, which is the measurement wavelength, to the absorbance at the reference wavelength of 1770 nm is obtained, and the absorbance normalized at 2300 nm and the breaking strength The correlation of test values was investigated. As a result, the correlation coefficient was 0.99.

Figure 0005191272
Figure 0005191272

（実施例２）
図１に示す装置を用い、１フィラメントあたりの繊度：３．３デシテックス、トウ繊度：３８９００デシテックス、目標強力値：１６０ｎのアセテートトウ製造ラインの乾燥工程の下流側に密度量測定装置４を設置し、オンラインで吸光度の測定を行った。この際、捲縮付与装置２の圧力条件を９回変更し、９段階の強力値の異なるトウを作成した。各条件あたり３０秒間の吸光度値をコンピュータ内の演算部でモニタリングし平均値を求めた。また、その間のアセテートトウをサンプリングし破断強力試験を行った。この両試験で求めた強力値の結果を表２に示す。オンライン走行の測定となることから密度測定装置４と破断強力試験での測定点が合致していないにも関わらず、相関係数でｒ＝０．９を超える好結果が得られた。 (Example 2)
Using the apparatus shown in FIG. 1, the density measuring device 4 is installed on the downstream side of the drying process of the acetate tow production line with a fineness per filament: 3.3 dtex, a tow fineness: 38900 dtex, and a target strength value: 160 n. The absorbance was measured online. At this time, the pressure conditions of the crimp imparting device 2 were changed nine times to create tows having nine different strength values. Absorbance values for 30 seconds per each condition were monitored by a calculation unit in the computer, and an average value was obtained. In addition, the acetate tow was sampled and a breaking strength test was conducted. Table 2 shows the results of the strength values obtained in both tests. Since it was an online running measurement, a good result exceeding r = 0.9 was obtained in correlation coefficient although the measurement point in the density measuring device 4 and the breaking strength test did not match.

Figure 0005191272
Figure 0005191272

以上の説明は、本発明の実施形態の典型的な実施例について述べたものであるが、本発明における密度量測定装置４として、ユニット化された近赤外線分光光度計を採用し、その測定法を拡散反射法による測定を説明したが、既述したとおり、例えば透過法や透過反射法によって測定することもできる。   Although the above description has described a typical example of the embodiment of the present invention, a unitized near-infrared spectrophotometer is adopted as the density measuring device 4 in the present invention, and its measurement method is used. However, as described above, for example, the measurement can be performed by the transmission method or the transmission reflection method.

本発明のアセテートトウの捲縮付与工程、乾燥工程及び密度量測定装置の代表的配置例を示す工程説明図である。It is process explanatory drawing which shows the typical arrangement | positioning example of the crimp provision process of the acetate tow of this invention, a drying process, and a density amount measuring apparatus. 密度量測定装置の典型例である近赤外線分光光度計の内部の構成の一部を示すブロック図である。It is a block diagram which shows a part of internal structure of the near-infrared spectrophotometer which is a typical example of a density measuring device. 同近赤外線分光光度計のデータ処理部の構成の一部を示すブロック図である。It is a block diagram which shows a part of structure of the data processing part of the same near-infrared spectrophotometer.

符号の説明Explanation of symbols

１ アセテートトウ
２ 捲縮付与装置
３ 乾燥機
４ 密度量測定装置（近赤外線分光光度計）
５ 表示部
４１ 近赤外線光源部
４２ 分光部
４３ 照射部
４４ 測光部
４５ 信号処理部
４６ データ処理部
４６ａ 減衰率演算部
４６ｂ 密度量演算部
４６ｃ 記憶部
４６ｄ 強力値演算部
４７ 出力部
４９ コンピュータ 1 Acetate tow 2 Crimp imparting device 3 Dryer 4 Density measuring device (near infrared spectrophotometer)
5 Display unit 41 Near infrared light source unit 42 Spectroscopic unit 43 Irradiation unit 44 Photometry unit 45 Signal processing unit 46 Data processing unit 46a Attenuation rate calculation unit 46b Density amount calculation unit 46c Storage unit 46d Strong value calculation unit 47 Output unit 49 Computer

Claims (7)

アセテートトウに照射する近赤外線の参照波長を１７７０nm、測定波長を２２２０nmとし、さらに２３００nmで正規化すること、
アセテートトウに前記特定波長の近赤外線を照射して、前記各波長の吸光度からアセテートトウの近赤外線減衰率を測定すること、
前記減衰率からアセテートトウの密度量を演算すること、及び
得られる前記密度量から繊維帯の捲縮レベルを判定すること、
を含んでなるアセテートトウの品質測定方法。 The near-infrared reference wavelength irradiated to acetate tow is 1770 nm, the measurement wavelength is 2220 nm, and further normalized at 2300 nm.
Irradiating acetate tow with near infrared light of the specific wavelength, and measuring the near infrared attenuation rate of acetate tow from the absorbance of each wavelength;
Calculating the density amount of acetate tow from the attenuation rate, and determining the crimp level of the fiber band from the obtained density amount,
A method for measuring the quality of acetate tow comprising: 請求項１に記載された密度量の演算結果から、アセテートトウの密度量と引っ張り破断強度試験による繊維の強力値との相関から予め作成した相関回帰式に基づき強力値を演算して表示することを含んでなる、アセテートトウの品質測定方法。   Calculate and display the strength value based on the correlation regression equation created in advance from the correlation between the density amount of acetate tow and the strength value of the fiber by the tensile breaking strength test from the calculation result of the density amount described in claim 1. A method for measuring the quality of acetate tow, comprising: 請求項１に記載された品質測定方法により得られる捲縮レベルが規格のレベルから外れたとき、空気圧を利用するクリンプ装置の空気供給圧を制御することを含んでなる、アセテートトウの捲縮レベルの制御方法。   A crimp level of acetate tow comprising controlling an air supply pressure of a crimping device using air pressure when the crimp level obtained by the quality measuring method according to claim 1 deviates from a standard level. Control method. 請求項２に記載された品質測定方法により得られる繊維の強力値が規格の範囲から外れたとき、空気圧を利用するクリンプ装置の空気供給圧を制御することを含んでなる、アセテートトウの捲縮レベルの制御方法。   A crimp of acetate tow comprising controlling the air supply pressure of a crimping device that uses air pressure when the fiber strength value obtained by the quality measuring method according to claim 2 deviates from the standard range. Level control method. 請求項３又は４に記載されたアセテートトウの捲縮レベルの制御をアセテートトウの製造工程上で連続して行うことを含んでなるアセテートトウの捲縮レベルの制御方法。   A method for controlling the crimp level of acetate tow, comprising continuously controlling the crimp level of acetate tow according to claim 3 or 4 in the production process of acetate tow. 請求項５に記載された制御方法をオンラインにて連続して実施するための装置にあって、
捲縮付与装置及び乾燥機を経て連続走行するアセテートトウの密度量を演算する密度量演算手段と、当該密度量演算手段による演算結果に基づき前記繊維の強力値を演算する強力値演算手段と、当該強力値演算手段による演算結果を表示する表示手段とを備え、
前記密度量演算手段は近赤外線分光光度計を含んでなり、
当該近赤外線分光光度計は、近赤外線光源、光源照射部、特定波長を透過するフィルターを有する分光部、測光部、信号処理部、及び近赤外線減衰率演算部を含むデータ処理部を有し、
前記特定波長が、１７７０nmの参照波長、２２２０nmの測定波長、及び２３００nmで正規化された波長であり、
前記強力値演算手段は、アセテートの密度量と繊維の強力値との相関から予め作成した相関回帰式に基づき、前記密度量演算手段により演算された密度量から前記強力値を演算し、その演算結果を上記表示手段に出力する出力部を有してなる、
アセテートトウの捲縮レベルの制御装置。 An apparatus for continuously carrying out the control method according to claim 5 online,
A density amount calculating means for calculating the density amount of acetate tow continuously running through the crimping device and the dryer, and a strong value calculating means for calculating the strength value of the fiber based on the calculation result by the density amount calculating means; Display means for displaying the calculation result by the strong value calculation means,
The density amount calculating means comprises a near infrared spectrophotometer,
The near-infrared spectrophotometer has a data processing unit including a near-infrared light source, a light source irradiation unit, a spectroscopic unit having a filter that transmits a specific wavelength, a photometry unit, a signal processing unit, and a near-infrared attenuation rate calculation unit,
The specific wavelength is a reference wavelength of 1770 nm, a measurement wavelength of 2220 nm, and a wavelength normalized at 2300 nm;
The strength value calculating means calculates the strength value from the density amount calculated by the density amount calculating means based on a correlation regression equation prepared in advance from the correlation between the density amount of acetate and the strength value of the fiber, and the calculation An output unit for outputting the result to the display means;
A control device for the crimp level of acetate tow. 前記強力値の前記演算結果に基づき、空気圧を利用する前記捲縮付与装置の空気供給圧を制御する制御部を有してなる請求項６記載のアセテートトウの捲縮レベルの制御装置。   7. The apparatus for controlling a crimp level of acetate tow according to claim 6, further comprising a control unit that controls an air supply pressure of the crimp applying apparatus that uses air pressure based on the calculation result of the strong value.
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