CA2575469A1 - Process for producing sandwich structures with particulate material pattern - Google Patents

Process for producing sandwich structures with particulate material pattern Download PDF

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Publication number
CA2575469A1
CA2575469A1 CA002575469A CA2575469A CA2575469A1 CA 2575469 A1 CA2575469 A1 CA 2575469A1 CA 002575469 A CA002575469 A CA 002575469A CA 2575469 A CA2575469 A CA 2575469A CA 2575469 A1 CA2575469 A1 CA 2575469A1
Authority
CA
Canada
Prior art keywords
particulate material
carrier
pattern
model
determining
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.)
Granted
Application number
CA002575469A
Other languages
French (fr)
Other versions
CA2575469C (en
Inventor
Horst Blessing
Hans-Adolf Jackels
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.)
Procter and Gamble Co
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34925956&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2575469(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from EP04017789A external-priority patent/EP1621165B1/en
Application filed by Individual filed Critical Individual
Priority to CA2733849A priority Critical patent/CA2733849C/en
Priority to CA2734074A priority patent/CA2734074A1/en
Publication of CA2575469A1 publication Critical patent/CA2575469A1/en
Application granted granted Critical
Publication of CA2575469C publication Critical patent/CA2575469C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

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    • A61F13/00—Bandages or dressings; Absorbent pads
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    • A61F13/534—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 an inhomogeneous composition through the thickness of the pad
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    • 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
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1025—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina to form undulated to corrugated sheet and securing to base with parts of shaped areas out of contact
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628—Nonplanar uniform thickness material

Abstract

The present invention is concerned with a process for forming a very well defined pattern of particulate material in a composite material comprising a web material and particulate absorbent material. The present invention relates also to a method for determining the equipment design and process parameter for such a process. In a particular application, the present invention provides a process for preparing liquid absorbent structures, such as may be useful for disposable absorbent articles.

Claims (9)

1. A method for continuously producingg a pattern of particulate material in a sandwich structure (300), comprising the steps of providing - a particulate material (310);
- a transfer device (440) for receiving said particulate material (300) in a receiving region (442) and transferring it to an discharging region (448), - said transfer device (440) comprising a first pattern forming means (452), - at least one essentially flat web material as carrier (320) and / or cover (330) material - an essentially endless carrier support means (470) for said carrier material (320) having a support pattern corresponding to the pattern of said first pattern forming means of said transfer device (470);
- a carrier material holding means (472) for temporarily attaching said carrier material (320) to said surface of said carrier support means (470), - a sandwich fixation means (495) for combining the sandwich structure (300), executing the process steps of - transferring said particulate material (310) to said receiving region (442) of said transfer device (440), whereby said first pattern forming means defines a particulate cluster pattern;
- moving said pattern of particulate material to the discharging region (448) of said transfer device (440);
- guiding said carrier material (320) over said carrier support means (470) at a carrier speed corresponding to the carrier support speed, - deforming said carrier material (320) by said carrier material holding means (472), such that an indentation (328) is formed in the unsupported regions, thereby forming a pattern corresponding to said particulate cluster pattern;
- expelling said particulate material (310) from said transfer device towards said carrier material 320), - depositing said expelled particulate material (310) on said deformed carrier material (320);
- applying said cover material (330) to said carrier material (320) and said patterned particulate material (319), thereby forming a sandwich structure (300), - providing fixation means (495) for bonding the outer sandwich layers to each other, at least in parts of the bonding area (360).
2. A method for determining the equipment design and process parameters for a process for selectively positioning particulate material (310) onto a moving surface (325), by 1) providing a set of physical equations forming a physical model, said set of physical equations being connected by interaction boundary conditions, optionally comprising sub-models connected by sub-model connectivity boundary conditions, 2) selecting a set of fixed boundary conditions, comprising the overall equipment set-up, overall process requirements, and a set of initial operating conditions (fixed model input),
3) providing a set of predetermined model targets,
4) selecting a set of variable boundary conditions, which may vary throughout one simulation (variable model input),
5) performing calculus operations on the physical equations by using the initial operating conditions and variable boundary conditions,
6) transforming the calculus results into a model output, which is readable to a human analyst directly or preferably by a means of a computing device;
7) comparing the model output to predetermined model targets and determining the deviation there between,
8) modifying the set of variable boundary conditions, preferably by using computational equations for minimizing the deviation between said model output to predetermined model targets;
9) reiterating steps 4) to 8) until a preset exit criterion is met.

3. A method for determining the equipment design and process parameter for a process for selectively positioning particulate material (310) onto a moving surface (325) according to claim 2, wherein said calculations are performed by employing a computer device.

4. A method for determining the equipment design and process parameter for a process for selectively positioning particulate material (310) onto a moving surface (325) according to claim 2 or 3, wherein said exit criterion is defined by a preset number of iterations.

5. A method for determining the equipment design and process parameter for a process for selectively positioning particulate material (310) onto a moving surface according to claim 2 or 3, wherein said exit criterion is defined by a preset exit deviation criterion between the model output and said predetermined model targets.

6. A system for determining the equipment design and process parameter for a process for selectively positioning particulate material (310) onto a moving surface (325), said system comprising a memory device and a processor, disposed in communication with said memory device, said processor being configured a) to receive virtual simulation programs and overall boundary conditions;
b) simulation targets;
c) and simulation starting parameter so as to calculate a set of pre-defined output parameter and to transmit the output parameter to an output device.

7. A system for determining the equipment design and process parameter for a process for selectively positioning particulate material onto a moving surface according to claim 7, wherein the deviation of the output parameter from the simulation targets determine the exit criteria.
CA2575469A 2004-07-28 2005-07-28 Process for producing sandwich structures with particulate material pattern Expired - Fee Related CA2575469C (en)

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CA2733849A CA2733849C (en) 2004-07-28 2005-07-28 Process for producing sandwich structures with particulate material pattern
CA2734074A CA2734074A1 (en) 2004-07-28 2005-07-28 Process for producing sandwich structures with particulate material pattern

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EP04017789.1 2004-07-28
EP04017789A EP1621165B1 (en) 2004-07-28 2004-07-28 Indirect printing of AGM
PCT/US2005/026834 WO2006015141A2 (en) 2004-07-28 2005-07-28 Process for producing sandwich structures with particulate material pattern

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