JP6382081B2 - シート融着体の製造装置及び製造方法 - Google Patents
シート融着体の製造装置及び製造方法 Download PDFInfo
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8324—Joining or pressing tools pivoting around one axis
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- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1629—Laser beams characterised by the way of heating the interface
- B29C65/1648—Laser beams characterised by the way of heating the interface radiating the edges of the parts to be joined
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- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1629—Laser beams characterised by the way of heating the interface
- B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
- B29C65/1661—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning repeatedly, e.g. quasi-simultaneous laser welding
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- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
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- B29C65/1664—Laser beams characterised by the way of heating the interface making use of several radiators
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- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
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- B29C65/7473—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using other than mechanical means using radiation, e.g. laser, for simultaneously welding and severing
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- B29C65/7879—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined said parts to be joined moving in a closed path, e.g. a rectangular path
- B29C65/7882—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined said parts to be joined moving in a closed path, e.g. a rectangular path said parts to be joined moving in a circular path
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
- B29C66/024—Thermal pre-treatments
- B29C66/0246—Cutting or perforating, e.g. burning away by using a laser or using hot air
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/431—Joining the articles to themselves
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
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- B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/729—Textile or other fibrous material made from plastics
- B29C66/7294—Non woven mats, e.g. felt
- B29C66/72941—Non woven mats, e.g. felt coated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/81463—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/822—Transmission mechanisms
- B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
- B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
- B29C66/83411—Roller, cylinder or drum types
- B29C66/83415—Roller, cylinder or drum types the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
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- B29C65/16—Laser beams
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- B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
- B29C65/1619—Mid infrared radiation [MIR], e.g. by CO or CO2 lasers
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Description
好ましくは、外装体3を構成する外層シート31及び内層シート32は、それぞれが、加圧される部位の厚みが小さくなる不織布である。
以下、本発明のシート融着体の一例であるパンツ型使い捨ておむつの製造方法の一実施態様を、後述するレーザー式接合装置20を用いて説明する。
複数枚のシートの縁部が重なった状態で融着したシール縁部を有するシート融着体の製造方法であって、
前記複数枚のシートの少なくとも一部のシートは樹脂材を含み、
第1面及びそれと反対側に位置する第2面を有する支持部材における該第1面上に、前記複数枚のシートが重ねられた構成を有する帯状のシート積層体をその長手方向にわたって支持させ、該支持部材の該第1面上に支持された該シート積層体を加圧部材を用いて加圧しながら搬送する加圧搬送工程と、
前記支持部材における前記第2面側に配置され、かつレーザー光を集光するレンズを有する照射ヘッドから、該支持部材の該第1面上に加圧支持された前記シート積層体に対して、該支持部材に設けられた、前記シート積層体の幅方向に長いスリット状の支持部材側開口部に沿って、該シート積層体の構成部材の一部を残す程度のレーザー光を照射して、該構成部材の一部で繋がっていると共に切断された複数枚のシートどうしが融着した仮シール縁部を形成するレーザー光照射工程と、
前記支持部材の前記第1面上に加圧支持された前記シート積層体に対して、該シート積層体の前記仮シール縁部における一部切り残した前記構成部材を切断し、前記シール縁部を形成する切断工程と、
切断された前記シート積層体を、前記支持部材の該第1面上にて前記加圧状態を維持したまま保持し前記シール縁部を固化させる後保持工程とを備えているシート融着体の製造方法。
前記切断工程は、前記支持部材における前記第2面側に配置され、かつレーザー光を集光するレンズを有する照射ヘッドから、前記シート積層体に対して、前記スリット状の支持部材側開口部に沿ってレーザー光を照射して行う前記<1>に記載のシート融着体の製造方法。
<3>
前記レーザー光照射工程に用いる照射ヘッドから照射するレーザー光のスポット径と、前記切断工程に用いる照射ヘッドから照射するレーザー光のスポット径とは、同じである前記<1>又は<2>に記載のシート融着体の製造方法。
<4>
前記切断工程は、前記レーザー光照射工程に用いた照射ヘッドを用いて行う前記<1>〜<3>の何れか1に記載のシート融着体の製造方法。
<5>
前記切断工程は、前記レーザー光照射工程に用いた照射ヘッドとは別の照射ヘッドを前記支持部材における前記第2面側に配置して、該別の照射ヘッドを用いて行う前記<1>〜<3>の何れか1に記載のシート融着体の製造方法。
<6>
前記切断工程は、刃物を用いて行う前記<1>に記載のシート融着体の製造方法。
<7>
前記刃物は、熱刃である前記<6>に記載のシート融着体の製造方法。
<8>
前記シート積層体は、前記複数枚のシートと弾性部材とを構成部材として有し、
前記仮シール縁部における一部切り残した前記構成部材は、前記弾性部材である前記<1>〜<7>の何れか1に記載のシート融着体の製造方法。
<9>
前記シート積層体は、前記複数枚のシートを構成部材として有し、
前記仮シール縁部における一部切り残した前記構成部材は、前記複数枚のシートの内の一部のシートである前記<1>〜<7>の何れか1に記載のシート融着体の製造方法。
<10>
前記切断工程に用いるレーザー光の照射エネルギーは、前記レーザー光照射工程に用いるレーザー光の照射エネルギーより小さい前記<8>又は<9>に記載のシート融着体の製造方法。
<11>
前記切断工程は、前記仮シール縁部の大きさを保ったまま、前記シール縁部を形成する前記<10>に記載のシート融着体の製造方法。
前記<1>〜<11>の何れか1に記載の製造方法により前記シート融着体を製造する工程を含む、吸収性物品の製造方法。
前記吸収性物品は、吸収性本体と、該吸収性本体の非肌当接面側に配されて該吸収性本体を固定している外装体とを備え、腹側部における該外装体の両側縁部と背側部における該外装体の両側縁部とが接合されて一対のサイドシール部が形成されているパンツ型使い捨ておむつであり、
帯状の前記外装体をその幅方向に折り畳み、折り畳まれた該外装体を、前記加圧搬送工程にて加圧状態で搬送しながら、前記レーザー光照射工程にて、該外装体の構成部材の一部で繋がっていると共に切断された該外装体の構成部材である複数枚のシートどうしが融着した仮サイドシール部を形成し、その後、前記切断工程にて、該仮サイドシール部における残りの前記構成部材の一部を切断し、前記シール縁部を加圧保持したまま固化し、前記サイドシール部を形成して前記シート融着体とする、前記<12>に記載の吸収性物品の製造方法。
<14>
前記外装体を構成するシートは、加圧される部位の厚みが小さくなる不織布である前記<13>に記載の吸収性物品の製造方法。
<15>
前記外装体は、外層シート、内層シート及び弾性部材を構成部材として有している前記<13>又は<14>に記載の吸収性物品の製造方法。
<16>
連続的に供給される帯状の前記外層シートと、連続的に供給される帯状の前記内層シートの間に、前記弾性部材を伸長状態で複数本配する前記<15>に記載の吸収性物品の製造方法。
<17>
一対のニップロールの間に、複数本の前記弾性部材を伸長状態で挟み込んだ帯状の前記外層シート及び帯状の前記内層シートを送り込んで加圧することにより、該帯状シートの外層シートと該帯状の前記内層シートとの間に複数本の該弾性部材が伸長状態で配された帯状の前記外装体を形成する前記<15>又は<16>に記載の吸収性物品の製造方法。
<18>
連続的に供給される帯状の前記外層シートと、連続的に供給される帯状の前記内層シートの間に、ウエストギャザーを形成するウエスト部弾性部材、胴回りギャザーを形成する胴回り部弾性部材及びレッグギャザーを形成するレッグ部弾性部材を、所定の伸長率に伸長させた伸長状態で各々複数本配する前記<15>〜<17>の何れか1に記載の吸収性物品の製造方法。
<19>
前記ウエスト部弾性部材及び前記胴回り部弾性部材には、前記外層シートと前記内層シートとの間に配される前に、接着剤塗工機によりホットメルト型接着剤が間欠的に塗工されている前記<18>に記載の吸収性物品の製造方法。
1A 腹側部
1B 背側部
F 前身頃
R 後身頃
2 吸収性本体
3 外装体
31 外層シート
32 内層シート
33 シート
4 サイドシール部
4t 仮サイドシール部
40 融着部
41 シール縁部
41t 仮シール縁部
5,6,7 弾性部材
10 おむつ連続体(帯状の外装体)
20 レーザー式接合装置
21 支持部材
23 円筒ロール
24 支持部
25 第2円筒ロール
26 加圧部材
26A 本体部
26B 加圧部
261 加圧部材側開口部
262a 先端部
262b 後端部
263 接続部材
264 本体中空部
265 局所加圧部材
265A 加圧面
266 カッター刃
267 シリンダ
27 支持部材側開口部(光通過部)
30 レーザー光
35 照射ヘッド
Claims (10)
- 複数枚のシートの縁部が重なった状態で融着したシール縁部を有するシート融着体の製造方法であって、
前記複数枚のシートの少なくとも一部のシートは樹脂材を含み、
第1面及びそれと反対側に位置する第2面を有する支持部材における該第1面上に、前記複数枚のシートが重ねられた構成を有する帯状のシート積層体をその長手方向にわたって支持させ、該支持部材の該第1面上に支持された該シート積層体を加圧部材を用いて加圧しながら搬送する加圧搬送工程と、
前記支持部材における前記第2面側に配置され、かつレーザー光を集光するレンズを有する照射ヘッドから、該支持部材の該第1面上に加圧支持された前記シート積層体に対して、該支持部材に設けられた、前記シート積層体の幅方向に長いスリット状の支持部材側開口部に沿って、該シート積層体の構成部材の一部を残す程度のレーザー光を照射して、該構成部材の一部で繋がっていると共に切断された複数枚のシートどうしが融着した仮シール縁部を形成するレーザー光照射工程と、
前記支持部材の前記第1面上に加圧支持された前記シート積層体に対して、該シート積層体の前記仮シール縁部における一部切り残した前記構成部材を切断し、前記シール縁部を形成する切断工程と、
切断された前記シート積層体を、前記支持部材の該第1面上にて前記加圧状態を維持したまま保持し前記シール縁部を固化させる後保持工程とを備えているシート融着体の製造方法。 - 前記切断工程は、前記支持部材における前記第2面側に配置され、かつレーザー光を集光するレンズを有する照射ヘッドから、前記シート積層体に対して、前記スリット状の支持部材側開口部に沿ってレーザー光を照射して行う請求項1に記載のシート融着体の製造方法。
- 前記レーザー光照射工程に用いる照射ヘッドから照射するレーザー光のスポット径と、前記切断工程に用いる照射ヘッドから照射するレーザー光のスポット径とは、同じである請求項1又は2に記載のシート融着体の製造方法。
- 前記切断工程は、前記レーザー光照射工程に用いた照射ヘッドを用いて行う請求項1〜3の何れか1項に記載のシート融着体の製造方法。
- 前記切断工程は、前記レーザー光照射工程に用いた照射ヘッドとは別の照射ヘッドを前記支持部材における前記第2面側に配置して、該別の照射ヘッドを用いて行う請求項1〜3の何れか1項に記載のシート融着体の製造方法。
- 前記切断工程は、刃物を用いて行う請求項1に記載のシート融着体の製造方法。
- 前記シート積層体は、前記複数枚のシートと弾性部材とを構成部材として有し、
前記仮シール縁部における一部切り残した前記構成部材は、前記弾性部材である請求項1〜6の何れか1項に記載のシート融着体の製造方法。 - 前記シート積層体は、前記複数枚のシートを構成部材として有し、
前記仮シール縁部における一部切り残した前記構成部材は、前記複数枚のシートの内の一部のシートである請求項1〜6の何れか1項に記載のシート融着体の製造方法。 - 請求項1〜7の何れか1項に記載の製造方法により前記シート融着体を製造する工程を含む、吸収性物品の製造方法。
- 前記吸収性物品は、吸収性本体と、該吸収性本体の非肌当接面側に配されて該吸収性本体を固定している外装体とを備え、腹側部における該外装体の両側縁部と背側部における該外装体の両側縁部とが接合されて一対のサイドシール部が形成されているパンツ型使い捨ておむつであり、
帯状の前記外装体をその幅方向に折り畳み、折り畳まれた該外装体を、前記加圧搬送工程にて加圧状態で搬送しながら、前記レーザー光照射工程にて、該外装体の構成部材の一部で繋がっていると共に切断された該外装体の構成部材である複数枚のシートどうしが融着した仮サイドシール部を形成し、その後、前記切断工程にて、該仮サイドシール部における残りの前記構成部材の一部を切断し、前記シール縁部を加圧保持したまま固化し、前記サイドシール部を形成して前記シート融着体とする、請求項9記載の吸収性物品の製造方法。
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