JP6271426B2 - 使い捨て着用物品およびその製造方法 - Google Patents
使い捨て着用物品およびその製造方法 Download PDFInfo
- Publication number
- JP6271426B2 JP6271426B2 JP2014528103A JP2014528103A JP6271426B2 JP 6271426 B2 JP6271426 B2 JP 6271426B2 JP 2014528103 A JP2014528103 A JP 2014528103A JP 2014528103 A JP2014528103 A JP 2014528103A JP 6271426 B2 JP6271426 B2 JP 6271426B2
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- JP
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- Prior art keywords
- web
- granular material
- liquid
- nonwoven fabrics
- granular
- 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.)
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/531—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad
- A61F13/532—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
- A61F13/5323—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad having absorbent material located in discrete regions, e.g. pockets
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- A61F13/00—Bandages or dressings; Absorbent pads
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- A61F13/00—Bandages or dressings; Absorbent pads
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- A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
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- A61F13/00—Bandages or dressings; Absorbent pads
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- A61F13/00—Bandages or dressings; Absorbent pads
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- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
- A61F13/15723—Partitioning batts; Cutting
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- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
- B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
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- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—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
- B29C65/7841—Holding or clamping means for handling purposes
- B29C65/7847—Holding or clamping means for handling purposes using vacuum to hold at least one of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
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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
- B29C66/71—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 composition of the plastics material of the parts to be joined
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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
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
-
- 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
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/849—Packaging machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/48—Wearing apparel
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- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/04—Punching, slitting or perforating
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-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2310/00—Treatment by energy or chemical effects
- B32B2310/028—Treatment by energy or chemical effects using vibration, e.g. sonic or ultrasonic
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/144—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers using layers with different mechanical or chemical conditions or properties, e.g. layers with different thermal shrinkage, layers under tension during bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
Description
また、膨潤により接合部分が分離するため、粒状体の配置パターンの初期の形状が型崩れして、2枚の基材シートの間で粒状体が片寄るだろう。
所定のパターンで互いに区画された複数の配置エリアごとに体液を吸液して膨潤する複数の粒状体が、前記パターンに従って互いに接合部において接合された2枚の透液性の不織布の間に配置された吸収性本体と、
前記吸収性本体の非肌面に配置された不透液性のバックシートとを備え、ここにおいて、
前記2枚の不織布のうちの肌面側の不織布の全面を覆う透液性のシートが配置され、
前記2枚の不織布のうちの少なくとも一方の不織布における前記複数の配置エリアの少なくとも1以上の配置エリアには、前記粒状体が体液を吸収して膨潤した際に生じる力で破断する易破断部が形成されている。
この破断後、一部の粒状体は破断した易破断部を通って2枚の吸収性本体の配置エリアから押し出される。しかし、吸収性本体の非肌面側はバックシートで覆われているうえ、吸収性本体の肌面側は前記吸収性本体の不織布とは別の透液性シートで覆われている。したがって、体液を吸収した粒状体や体液が着用物品から漏れ出るおそれはない。
本発明において、「易破断部」とは、2枚の不織布の間に配置された粒状体が膨潤していない状態では粒状体が実質的に溢れ出る開口とはならず、かつ、同粒状体が吸液して膨潤するとその際に配置エリア内に生じる圧力で破断して粒状体が溢れ出る部分を意味する。
なお、本発明において「肌面」とは着用物品の着用時に着用者の肌に直接的または間接的に接する内側の面であり、「非肌面」とは前記肌面の反対側の面を意味する。
かかるミシン目状の易破断部は、吸収性本体内の膨潤した粒状体の圧力で易破断部を有する不織布が破断した際に、易破断部が連なって大きな開口となる。そのため、易破断部を通って粒状体が吸収性本体から出易い。その一方で、超音波溶着された前記不織布同士は分離せず、粒状体の配置パターンの初期の形状が型崩れし難いだろう。
「切り込み」とは、不織布にトリミング片が生じることなく生成された、繊維の連続を遮断するラインをいう。
又、前記易破断部は不織布を熱によって硬化させて脆弱化させることで、強度を劣化(低下)させたものであってもよい。
更に、不織布自体が幅方向に引っ張られた際に裂け易い材料で構成されていることで、易破断部が形成されていてもよい。
前記搬送中のキャリアウエブの前記第1面とは反対の第2面上に前記粒状体を供給する工程と、
前記キャリアウエブの前記第2面上の前記各配置エリアごとに前記供給された複数の粒状体の一部を保持して前記所定のパターンで配置する工程と、
前記2枚の不織布のうちの他の1枚を形成するカバーウエブに前記易破断部が形成される工程と、
前記粒状体を前記所定のパターンで配置する工程の後に、前記キャリアウエブの前記第2面および前記粒状体を前記易破断部を有するカバーウエブで覆ってサンドイッチ構造体を生成する工程と、
前記所定のパターンで配置された前記各配置エリアの前記粒状体が前記複数の配置エリアのうちの1つの配置エリアから別の配置エリアへ移動するのを抑制ないし防止するために、前記接合部となる部位において前記キャリアウエブと前記カバーウエブとを接合する工程とを備える。
図1Aに示すように、本実施例の着用物品100は、吸収性本体(オムツ本体)200、前胴回り部301および後胴回り部302を備えている。前記吸収性本体200は、着用者の前胴を覆うフロント部201、着用者の後胴を覆うバック部202、ならびに、前記フロント部201とバック部202との間の股間を覆う股部203を有している。
また、吸収性本体200には、着用者の脚部に沿って括れた脚回り部を形成してもよい。
図3Bの第1ウエブ21と第2ウエブ22とは図3Aのように例えば縦横に延びる例えば格子状の溶着ラインL、Lに沿って互いに溶着されて、その間にコア23を挟んだサンドイッチ構造を形成する。すなわち、図3Bに示すように、コア23は前記溶着ラインL,Lに沿って互いに溶着された第1ウエブ21および第2ウエブ22に囲まれている。
なお、各図において溶着された接合部Wはxxで示される。
なお、不織布としては、ポリプロピレン,ポリエチレン,ポリエステル等の熱可塑性樹脂製不織布が挙げられ、また、綿やレーヨン等の熱可塑性を示さない繊維等を前記熱可塑性樹脂製繊維に混紡した不織布であってもよい。
なお、各図において粒状体3は多数の微細なドットで示される。また、図1Aおよび図5A〜図5Cについては、易破断部10を分りやすくするために粒状体3は図示していない。
また、各溶着ラインLは完全に連なっている必要はなく、各集合グループ30の粒状体3が他の集合グループ30に移動しにくい程度に溶着部位が断続的に形成されていてもよい。
図1A〜図2に示すように、第1ウエブ21の各配置エリアDには、例えば、断続的に形成された「切り込み」を含むミシン目状の易破断部10が形成されている。
なお、トップシート6と第1ウエブ21との間には、体液をコア23の面方向に(面に沿って)拡散させる拡散層や体液を一時的に保持する液保持層が設けられてもよい。
図4に示すように、第1導入ローラ71により第2ウエブ22(図2)となるキャリアウエブ1が搬送ドラム4に導入され、キャリアウエブ1の第1面11を搬送ドラム4の搬送面41で吸着保持しながら、前記キャリアウエブ1が所定の搬送経路つまり前記搬送ドラム4の搬送面41に沿って搬送される。
前記搬送ドラム4に形成された吸引孔(図示せず)に向かってエアが吸引されることで前記供給された粒状体3は前記キャリアウエブ1上の前記第2面12の前記配置エリアDにおいて集合グループ30ごとに吸着保持される。
なお、前記エアの少なくとも一部にキャリアウエブ1の前記第2面12に沿う方向の流れの成分を付与する気流偏向体がキャリアウエブ1の第2面12に対向して設けられてもよい。(PCT/JP2012/52371)
粒状体3の層の厚さは搬送ドラム4の軸方向において中央が両端よりも厚くてもよい。また、粒状体3の層の厚さは、1つの吸収性本体200(図1)の周縁において薄く、かつ、中央やその近傍において厚くてもよい。
図1Aの前記易破断部10を有する第1ウエブ21および該第1ウエブ21を覆うトップシート6を有する吸収性本体200に体液が吸収されると、体液により図1Bの粒状体3が膨潤し、第1ウエブ21(不織布)と第2ウエブ22(不織布)との間が膨らむ。この粒状体3の膨らみにより、前記第1ウエブ21に加わる負荷が大きくなりすぎると、図1Aの前記易破断部10において第1ウエブ21が裂け、前記第1ウエブ21の易破断部10の切り込み同士が連なって、配置エリアD内において、第1ウエブ21の一部が破断する。
一方、接合部Wにおいて互いに超音波溶着されている第1ウエブ21と第2ウエブ22は粒状体3の膨潤によっても互いに分離しない。
たとえば、搬送装置としてドラムではなくコンベヤを採用してもよい。
また、キャリアウエブ1とカバーウエブ2との接合方法として、超音波溶着の他に、たとえばヒートシールなどの熱溶着による接合方法や接着剤を用いた接着による接合方法を用いてもよい。
また、本発明において、各配置エリアDには粒状体の集合体のみが配置されている場合の他に、複数の粒状体に他の粒状の材料やパルプ等の繊維材料が混合されていてもよい。
したがって、そのような変更および修正は、請求の範囲から定まる本発明の範囲内のものと解釈される。
2:カバーウエブ(不織布)、20:サンドイッチ構造体、21:第1ウエブ 、22:第2ウエブ、23:コア、24:バックシート
3:粒状体、30:集合グループ、D:配置エリア
4:搬送ドラム、41:搬送面
5:供給装置
6:トップシート
71:第1導入ローラ、72:第2導入ローラ
81:超音波ホーン
100:着用物品、200:吸収性本体(オムツ本体)、201:フロント部、202:バック部、203:股部、301:前胴回り部、302:後胴回り部
L:溶着ライン
X:胴回り方向、Y:縦方向
W:接合部
W1:接合部
Claims (1)
- 使い捨て着用物品であって、
所定のパターンで互いに区画された複数の配置エリアの各配置エリアごとに吸液性の複数の粒状体が、前記パターンに従って互いに接合部において接合された2枚の透液性の不織布の間に配置された吸収性本体と、
前記吸収性本体の非肌面に配置された不透液性のバックシートとを備え、ここにおいて、
前記各配置エリアは、それぞれ、前記接合部によって周囲が囲まれ、かつ、前記接合部を含まない1つのエリアであり、
前記接合部は前記2枚の不織布に超音波エネルギーを付与することで形成された超音波接合部であり、前記粒状体が体液を吸収して膨潤した際に生じる力で前記接合部において前記不織布同士が互いに分離しない接合強度を有し、
前記2枚の不織布のうちの肌面側の不織布の全面を覆う透液性のシートが配置され、
前記2枚の不織布のうちの少なくとも一方の不織布における前記複数の配置エリアの少なくとも1以上の各配置エリアには、前記粒状体が体液を吸収して膨潤した際に生じる力で破断する易破断部が線状に、かつ、断続的に形成されており、
前記易破断部は、前記1以上の配置エリアの各配置エリアごとに前記不織布に断続的に形成された複数の孔、スリットおよび/または切り込みを含むことにより前記線状に形成されている、使い捨て着用物品。
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JP (1) | JP6271426B2 (ja) |
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WO (1) | WO2014021188A1 (ja) |
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JP6366565B2 (ja) * | 2015-12-09 | 2018-08-01 | 大王製紙株式会社 | 吸収性物品 |
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US5411497A (en) | 1993-10-29 | 1995-05-02 | Kimberly-Clark Corporation | Absorbent article which includes superabsorbent material located in discrete pockets having an improved containment structure |
JPH10165432A (ja) * | 1996-12-13 | 1998-06-23 | Hiromi Matsui | 高分子吸収体入り吸水ポケット付き吸水シ−ト |
JP4325994B2 (ja) * | 2003-07-31 | 2009-09-02 | 株式会社リブドゥコーポレーション | シート状体の製造方法および装置並びにシート状体を用いた使い捨て吸収性物品の製造方法 |
EP1974705B1 (en) * | 2007-03-26 | 2014-03-05 | Fameccanica.Data S.p.A. | Absorbing element for sanitary products, having expandable pockets containing superabsorbent material and manufacturing process |
CA2690503C (en) * | 2007-06-12 | 2015-10-27 | Dsg Technology Holdings Ltd. | Absorbent article with a slit absorbent core |
JP5693019B2 (ja) * | 2010-03-01 | 2015-04-01 | ユニ・チャーム株式会社 | 回転加工装置 |
JP5584058B2 (ja) * | 2010-08-31 | 2014-09-03 | 大王製紙株式会社 | 吸収性物品 |
EP2444046A1 (en) * | 2010-10-20 | 2012-04-25 | Vynka Bvba | Environmentally friendly absorbent structure |
JP5986506B2 (ja) | 2011-02-10 | 2016-09-06 | 株式会社瑞光 | 粒状体の配置方法および装置 |
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2013
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- 2013-07-25 CN CN201380039416.8A patent/CN104507432B/zh not_active Expired - Fee Related
- 2013-07-25 US US14/416,770 patent/US9532909B2/en active Active
- 2013-07-25 WO PCT/JP2013/070178 patent/WO2014021188A1/ja active Application Filing
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CN104507432A (zh) | 2015-04-08 |
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US20150173980A1 (en) | 2015-06-25 |
WO2014021188A1 (ja) | 2014-02-06 |
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