WO2022044418A1 - フィルム製品リールの放射線透過検査装置およびこれを用いたフィルム製品リールの製造方法、ならびにフィルム製品リールの放射線透過方法 - Google Patents

フィルム製品リールの放射線透過検査装置およびこれを用いたフィルム製品リールの製造方法、ならびにフィルム製品リールの放射線透過方法 Download PDF

Info

Publication number
WO2022044418A1
WO2022044418A1 PCT/JP2021/015162 JP2021015162W WO2022044418A1 WO 2022044418 A1 WO2022044418 A1 WO 2022044418A1 JP 2021015162 W JP2021015162 W JP 2021015162W WO 2022044418 A1 WO2022044418 A1 WO 2022044418A1
Authority
WO
WIPO (PCT)
Prior art keywords
film product
film
product reel
foreign matter
radiation
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2021/015162
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
渡辺充
飯塚尊則
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
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 Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP2021520438A priority Critical patent/JP7647551B2/ja
Publication of WO2022044418A1 publication Critical patent/WO2022044418A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
    • G01N23/18—Investigating the presence of flaws defects or foreign matter

Definitions

  • the present invention relates to a radiation transmission inspection device for inspecting foreign matter mixed in a film product reel from which a film is wound, a method for manufacturing a film product reel using the device, and a radiation transmission method for a film product reel.
  • Films such as various polymer films are generally supplied to manufacturers who use this film in a rolled state as a raw film.
  • the film is unwound from the wide original roll, slitted to obtain a desired film width, and the slitted film is wound around the core.
  • a slit-processed film unwind the film from the film product reel and use it.
  • the film is unwound from the raw material of the untreated film to perform surface treatment, and the treated film is wound to obtain a film product reel.
  • the surface-treated film is wound around the core, then the film is unwound from the film product reel, slit-processed, and then wound around the core again. Is common.
  • an object of the present invention is an inspection device capable of detecting minute foreign matter contained in a film product reel wound from a film conveyed at high speed, including whether or not it is a metallic foreign matter, for example. It is an object of the present invention to provide a method for manufacturing a film product reel using the above method, and a method for transmitting radiation from the film product reel.
  • the radiation transmission inspection device for the film product reel inspects foreign matter contained in the film product reel in which a long film is wound around the outer peripheral surface of the core.
  • a radiation transmission inspection device a mounting table on which the film product reel is placed, a pair of radiation sources and detectors that transmit and receive radiation in the radial direction with respect to the circumferential surface of the film product reel, and the detection. It comprises an image processing unit that generates a foreign matter detection image from the radiation detection result obtained by the device.
  • radiation refers to electromagnetic waves including X-rays, ⁇ -rays, ⁇ -rays, infrared rays and the like.
  • an area camera in which the image pickup elements are arranged in two dimensions, a line camera in which the image pickup elements are arranged in one dimension, or a TDI (Time Delivery Integration) camera in which a plurality of line cameras are provided perpendicular to the arrangement direction, etc. are used.
  • a line camera or a TDI camera it is preferable to arrange the image pickup elements so that they are parallel to the reel rotation axis.
  • the radiation transmission inspection device for a film product reel According to the radiation transmission inspection device for a film product reel according to the present invention, radiation is transmitted in the radial direction with respect to the circumferential surface of the film product reel, so that foreign matter can be detected with high sensitivity even if the reel width increases. It is possible to do.
  • the focus of the radiation is arranged in the inner cavity of the core and the detector is arranged on the outer side in the radial direction of the core.
  • the radiation transmission inspection device for the film product reel it is preferable to have a function of rotating the film product reel in the circumferential direction. Further, the pair of the radiation source and the detector may be swiveled in the circumferential direction of the film product reel.
  • the radiation transmission inspection device for the film product reel it is preferable to have a function of moving the film product reel in the width direction. Further, the pair of the radiation source and the detector may be moved in the width direction of the film product reel. With such a configuration, it is possible to inspect the full width of a film product reel having a width equal to or larger than one imaging field of view. Further, by setting the amount of one movement when moving in the width direction to less than half of the minimum field of view width (the imaging field of view width at the position closest to the radiation source of the film product reel), the same foreign matter can be seen in two or more fields of view. It can be imaged. In this case, since the foreign matter mixing depth can be estimated based on the foreign matter detection images before and after moving in the width direction, it is possible to determine whether or not the foreign matter is contained in the film portion of the film product reel. ..
  • the foreign matter is the film product reel based on the foreign matter detection image previously obtained for the core before the image processing unit winds the film. It is preferable to determine whether or not it is contained in the film portion of. In this way, by comparing the foreign matter detection image of the film product reel with the foreign matter detection image obtained in advance for the core before winding the film, the foreign matter contained in the core that does not directly affect the performance of the film product is subtracted. If only the foreign matter contained in the film portion is detected, the film product reel in which the foreign matter is contained only in the core is not erroneously determined as a defective product, so that the deterioration of the yield in the radiation transmission inspection can be avoided.
  • the method for manufacturing a film product reel according to the present invention includes a step of winding a long film around a core to obtain a film product reel, and the above-mentioned radiation transmission inspection apparatus. It comprises a method including a foreign matter inspection step for inspecting foreign matter contained in a film product reel. According to the method for manufacturing a film product reel according to the present invention, it is possible to efficiently manufacture a film product reel with less contamination of foreign matter.
  • the film product reel is often used as a battery separator film inserted between the positive electrode and the negative electrode of a lithium ion secondary battery, and is as small as several tens of ⁇ m. Since it is required to detect metallic foreign matter, it is effective to include the foreign matter inspection step using the above-mentioned radiation transmission inspection device in the manufacturing process of the film product reel.
  • the radiation transmission inspection method for a film product reel according to the present invention is applied to the circumferential surface of a film product reel in which a long film is wound around the outer peripheral surface of the core. It consists of a method of generating a foreign matter detection image from a radiation detection result obtained by transmitting radiation in the radial direction. According to the radiation transmission inspection method for a film product reel according to the present invention, radiation is transmitted in the radial direction with respect to the circumferential surface of the film product reel, so that foreign matter can be detected with high sensitivity even if the reel width increases. It is possible to do.
  • the present invention it is possible to perform a radiation transmission inspection of a film product reel capable of detecting foreign matter with high sensitivity even if the reel width is increased.
  • FIG. 1 It is a schematic diagram for demonstrating the radiation transmission inspection method of the film product reel which concerns on one Embodiment of this invention.
  • C) is a perspective view of the reel. It is a schematic diagram for demonstrating the radiation transmission inspection method of the film product reel which concerns on other embodiment of this invention, (A) is the perspective view of the reel when the detector of the type different from FIG. 1 is used. (B) is a schematic diagram showing that a difference in projection magnification occurs between the central portion and the end portion of the detector. It is a schematic diagram for demonstrating the method of detecting a foreign substance by the radiation transmission inspection method of FIG. The case where the rotation center axis and the X-ray focal position are deviated from each other is shown.
  • FIG. 1 It is a schematic diagram for demonstrating the method of estimating the foreign matter mixing depth by the radiation transmission inspection method of FIG.
  • the radiation transmission inspection apparatus which concerns on one Embodiment of this invention is shown, (A) front view, (B) is the left side view. It is a schematic diagram for demonstrating the radiation transmission inspection method of the film product reel which concerns on other embodiment of this invention.
  • FIG. 1A and 1B are schematic views for explaining a radiation transmission inspection method for a film product reel according to an embodiment of the present invention, where FIG. 1A is a front view of a reel end portion and FIG. 1B is a reel peripheral surface.
  • the front view and (C) are perspective views of the reel.
  • the X-ray source 4 is arranged on the rotation center axis of the cylindrical core 2.
  • Irradiated X-rays 5 pass through the film 3 and are received by a detector 6 composed of a TDI camera provided outside the core 2.
  • a detector 6 composed of a TDI camera provided outside the core 2.
  • foreign matter is generated by detecting the difference in the brightness of the received X-rays and performing image processing. Detected.
  • FIG. 1B is a front view of the reel peripheral surface
  • FIG. 1C is a perspective view of the reel.
  • d is the actual size of the foreign substance
  • D is the size on the detector that projects the foreign substance
  • FID Fluorescence Deformation
  • FOD Fluorescence Deformation
  • FIG. 3 is a schematic diagram for explaining a method of detecting a foreign substance by the radiation transmission inspection method of FIG.
  • the irradiation X-ray 5 is performed while rotating the product reel 1 which is a curved surface shape inspection sample in the reel circumferential direction. Is received by the detector 6, the brightness of the TDI camera can be integrated normally.
  • FIG. 3B since the rotation center axis of the core 2 and the X-ray focal point 16 are arranged so as to be offset from each other, the foreign matter B is not projected normally, and the brightness in the TDI camera is normally integrated. I can't.
  • the position of the X-ray focal point 16 may be changed.
  • the projection magnification for foreign matter existing on the inner surface of the core is FID / FOD (inside).
  • FIG. 4 is a schematic diagram for explaining a method of estimating the foreign matter mixing depth by the radiation transmission inspection method of FIG.
  • irradiation X-rays 5 are emitted while moving the product reel 1 (or a pair of the detector 6 and the X-ray source 4) in the reel width direction.
  • the detector 6 When the light is received by the detector 6, one foreign matter moves on the foreign matter detection image and draws a trajectory as shown in FIG.
  • Foreign matter is mixed in using FID and FOD by reading the relationship between the displacement of the product reel ( ⁇ x) and the displacement of foreign matter on the foreign matter detection image (x 1 ⁇ x 2 ) and performing a geometric calculation using Equation 1.
  • the depth (z) can be calculated.
  • FIG. 5 shows a radiation transmission inspection device according to an embodiment of the present invention, (A) is a front view, and (B) is a left side view.
  • the radiation transmission inspection device 11 is provided with a mounting table 13 for mounting the product reel 1 in which the film 3 is wound around the core 2 via the core receiver 12.
  • the mounting table 13 is moved in the width direction of the product reel 1 by using the width direction moving mechanism 14, so that the radiation source fixing frame 15 for fixing the X-ray source 4 is inside the core 2. Insert it into the cavity.
  • the destination can be moved to a predetermined inspection start position, but it can be moved to the end (edge) of the film 3 detected by the irradiation X-ray 5 and the detector 6, or another separately installed.
  • the inspection may be started after moving to the end of the film 3 detected by the sensor. Further, instead of moving the mounting table 13, the pair of the X-ray source 4 and the detector 6 may be moved in the width direction with respect to the fixed mounting table 13.
  • the product reel 1 is rotated by rotating the core receiver 12 in a state of irradiating X-rays so that the X-ray focus 16 of the irradiated X-rays 5 is arranged on the rotation center axis of the core 2, and the detector is detected.
  • the data continuously detected by 6 is image-processed to generate a foreign matter detection image.
  • the core receiving material preferably has a large friction with the core, and examples thereof include rubber. Further, as a measure other than the material, the core receiver and the core surface may be subjected to uneven processing and then rotated by engaging with each other.
  • the rotation position marker 17 is provided on the core 2, it is possible to obtain a foreign matter detection image for one round by using the rotation position marker 17 detected by the rotation position sensor 18 for each rotation as a clue. Further, image noise can be suppressed by averaging the foreign matter detection images for a plurality of laps.
  • a line camera or a TDI camera is used as the detector 6, it is preferable to match the scan speed of the camera with the rotation speed of the core receiver 12 in order to obtain a distortion-free image.
  • the rotation speed of the core receiver 12 or the core 2 may be measured by a speedometer such as an encoder and synchronized with the scan speed of the camera in case the rotation speed fluctuates.
  • the irradiation width of the irradiation X-ray 5 may be wider than that of the detector.
  • the mounting table 13 is moved in the width direction by a predetermined movement amount using the width direction movement mechanism 14, and then the foreign matter detection image is generated again. By repeating this over the entire width of the product reel 1, a foreign matter detection image of the entire product reel 1 can be obtained. It should be noted that it is determined whether or not the foreign matter is contained in the film 3 portion of the product reel 1 based on the foreign matter detection images before and after moving the product reel 1 or the pair of the X-ray source 4 and the detector 6 in the width direction, so-called. When performing an inspection by stereo imaging, it is preferable that the amount of movement of the mounting table 13 at one time is less than half of the foreign matter detection image width for one round. Further, when the mounting table 13 is moved, the rotation of the product reel 1 may be stopped, or the mounting table 13 may be moved while the product reel 1 is being rotated.
  • an area camera is used as the detector 6, and the others are the same. Unlike the TDI camera and the line camera, the area camera does not need to measure or control the rotation speed of the product reel 1 because it captures images in a stationary state, and as a flow for inspecting the entire circumference at a specific width position of the product reel 1.
  • the product reel 1 is rotated by ⁇ ⁇ stationary ⁇ imaging ⁇ the product reel 1 is rotated by ⁇ ⁇ ...
  • ⁇ is the rotation angle of the product reel 1 at the time of imaging the next field of view.
  • it is preferable that the position of the X-ray focal point 16 is displaced from the rotation center axis of the core 2. As a result, when the same foreign matter is detected in a plurality of visual fields during the all-around inspection, the foreign matter mixing position can be estimated. This principle will be described with reference to FIG.
  • FIG. 6 shows a schematic diagram when the same foreign matter is detected in two fields of view before and after rotating the product reel 1 in the circumferential direction around the origin O.
  • the equation 2 is established because the three points of the X-ray focus, the foreign matter, and the foreign matter projection position on the detector are on the same line.
  • FID 1 and FID 2 are the lengths of the line segments s 1 and s 2 , respectively.
  • ⁇ is appropriately set so that the same foreign matter is detected in a plurality of visual fields in the circumferential direction and the inspection time is not lengthened. If ⁇ is large, it may be possible to detect only one field of view, and if ⁇ is small, inspection time will be required. However, ⁇ does not have to be constant over the entire circumference. Normally, ⁇ is set to minimize the overlap with the next visual field, and only when foreign matter is detected, ⁇ is temporarily reduced to detect in multiple visual fields. You may let me. Further, although the case of detection in two visual fields has been described above, it can be obtained in the same manner even if it is detected in three or more visual fields, and the error can be further suppressed by averaging the calculated values and the like.
  • the manufacturing process to which the inspection method of the present invention is applied is not limited to the polyolefin battery separator film, but is not limited to a coating separator, a non-woven battery separator, a capacitor film, an MLCC mold release film, and a polyolefin microporous film used for high-precision filtration. It is also suitable for manufacturing processes such as.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
PCT/JP2021/015162 2020-08-26 2021-04-12 フィルム製品リールの放射線透過検査装置およびこれを用いたフィルム製品リールの製造方法、ならびにフィルム製品リールの放射線透過方法 Ceased WO2022044418A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021520438A JP7647551B2 (ja) 2020-08-26 2021-04-12 フィルム製品リールの放射線透過検査装置およびこれを用いたフィルム製品リールの製造方法、ならびにフィルム製品リールの放射線透過方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020142728 2020-08-26
JP2020-142728 2020-08-26

Publications (1)

Publication Number Publication Date
WO2022044418A1 true WO2022044418A1 (ja) 2022-03-03

Family

ID=80354918

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/015162 Ceased WO2022044418A1 (ja) 2020-08-26 2021-04-12 フィルム製品リールの放射線透過検査装置およびこれを用いたフィルム製品リールの製造方法、ならびにフィルム製品リールの放射線透過方法

Country Status (2)

Country Link
JP (1) JP7647551B2 (https=)
WO (1) WO2022044418A1 (https=)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006308316A (ja) * 2005-04-26 2006-11-09 Bridgestone Corp タイヤ内部構造観察方法、及びタイヤ内部構造観察装置
JP2006308456A (ja) * 2005-04-28 2006-11-09 Yokohama Rubber Co Ltd:The タイヤの非破壊検査装置
JP2019049544A (ja) * 2017-09-08 2019-03-28 住友化学株式会社 検査装置および検査方法
WO2019069686A1 (ja) * 2017-10-05 2019-04-11 東レ株式会社 構造物の検査装置
WO2019176903A1 (ja) * 2018-03-15 2019-09-19 東レ株式会社 異物の検査方法、検査装置、フィルムロール及びフィルムロールの製造方法
WO2020004435A1 (ja) * 2018-06-27 2020-01-02 東レ株式会社 放射線透過検査方法及び装置、並びに微多孔膜の製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006308316A (ja) * 2005-04-26 2006-11-09 Bridgestone Corp タイヤ内部構造観察方法、及びタイヤ内部構造観察装置
JP2006308456A (ja) * 2005-04-28 2006-11-09 Yokohama Rubber Co Ltd:The タイヤの非破壊検査装置
JP2019049544A (ja) * 2017-09-08 2019-03-28 住友化学株式会社 検査装置および検査方法
WO2019069686A1 (ja) * 2017-10-05 2019-04-11 東レ株式会社 構造物の検査装置
WO2019176903A1 (ja) * 2018-03-15 2019-09-19 東レ株式会社 異物の検査方法、検査装置、フィルムロール及びフィルムロールの製造方法
WO2020004435A1 (ja) * 2018-06-27 2020-01-02 東レ株式会社 放射線透過検査方法及び装置、並びに微多孔膜の製造方法

Also Published As

Publication number Publication date
JP7647551B2 (ja) 2025-03-18
JPWO2022044418A1 (https=) 2022-03-03

Similar Documents

Publication Publication Date Title
CN111684269B (zh) 异物的检查方法、检查装置、薄膜辊以及薄膜辊的制造方法
JP6266574B2 (ja) Ｘ線検査方法及びｘ線検査装置
US20210181125A1 (en) Radiation transmission inspection method and device, and method of manufacturing microporous film
KR102257982B1 (ko) 배터리 검사 방법
JPWO2019176903A5 (https=)
JP6865646B2 (ja) 欠陥検査装置、欠陥検査方法、及びセパレータ捲回体の製造方法
CN108132262A (zh) 缺陷检查装置、缺陷检查方法及隔膜卷绕体的制造方法
JP6933513B2 (ja) 欠陥検査装置、欠陥検査方法、セパレータ捲回体の製造方法、及びセパレータ捲回体
TW202040092A (zh) 檢查裝置、檢查方法及膜的製造方法
WO2003085391A1 (en) Method and device for x-ray inspection of tire
JP7647551B2 (ja) フィルム製品リールの放射線透過検査装置およびこれを用いたフィルム製品リールの製造方法、ならびにフィルム製品リールの放射線透過方法
CN108120725A (zh) 缺陷检查装置、缺陷检查方法、隔膜卷绕体的制造方法及隔膜卷绕体
JP5674581B2 (ja) 検査装置及び検査方法
JP2004156975A (ja) リード位置検出方法及び装置
JP2838248B2 (ja) 電力ケーブルのｘ線検査方法
JP3290927B2 (ja) 巻きずれ検査装置
CN212432076U (zh) 一种基于x射线的珍珠层厚度测量装置
JP3202311B2 (ja) 軸受部品の欠陥検査方法
JP7051847B2 (ja) Ｘ線インライン検査方法および装置
JP2022024920A (ja) 検査装置、その制御装置、制御方法および制御プログラム
JP2008249605A (ja) 結晶粒の極点図測定方法およびその装置
JP2004347542A (ja) シートの厚み測定方法及びシートの厚み測定装置
JP5094065B2 (ja) テラヘルツ波を用いる検査装置を備える画像形成装置
JPWO2022044418A5 (https=)
JP2022069392A (ja) 巻回体の内層シワ検査装置、巻回体の内層シワ検査方法及びウェブ巻回体の製造方法

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2021520438

Country of ref document: JP

Kind code of ref document: A

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21860850

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21860850

Country of ref document: EP

Kind code of ref document: A1