CA2233477A1 - A method for selectively aperturing a nonwoven web exhibiting surface energy gradients - Google Patents

A method for selectively aperturing a nonwoven web exhibiting surface energy gradients

Info

Publication number
CA2233477A1
CA2233477A1 CA002233477A CA2233477A CA2233477A1 CA 2233477 A1 CA2233477 A1 CA 2233477A1 CA 002233477 A CA002233477 A CA 002233477A CA 2233477 A CA2233477 A CA 2233477A CA 2233477 A1 CA2233477 A1 CA 2233477A1
Authority
CA
Canada
Prior art keywords
nonwoven web
surface energy
fluid
weakened
melt
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
CA002233477A
Other languages
French (fr)
Other versions
CA2233477C (en
Inventor
John Joseph Curro
Douglas Herrin Benson
James William Cree
Luis Eduardo Ferraz Do Amaral Ravaglia
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
Application filed by Individual filed Critical Individual
Publication of CA2233477A1 publication Critical patent/CA2233477A1/en
Application granted granted Critical
Publication of CA2233477C publication Critical patent/CA2233477C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
    • A61F13/15731—Treating webs, e.g. for giving them a fibrelike appearance, e.g. by embossing
    • 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
    • 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
    • A61F13/00987—Apparatus or processes for manufacturing non-adhesive dressings or bandages
    • A61F13/00991—Apparatus or processes for manufacturing non-adhesive dressings or bandages for treating webs, e.g. for moisturising, coating, impregnating or applying powder
    • 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.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture

Abstract

The present invention pertains, in a preferred embodiment, to a method for selectively aperturing a nonwoven web (22) exhibiting a plurality of surface energy gradients. The method includes the steps of: providing a nonwoven web (22) of fibers exhibiting a surface energy, the nonwoven web (22) having a first surface (61), a second surface (62) and a plurality of fluid passageways placing the first (61) and second (62) surfaces in fluid communication with one another; applying a surface treatment to the first surface (61) of the nonwoven web (22), the surface treatment having a surface energy less than the surface energy of the fibers of the nonwoven web (22) creating a plurality of surface energy gradients defined by discontinuous spaced regions which are adapted to exert a force on a fluid contacting the first surface (61), such that the fluid will be directed toward the fluid passageways for transportation away from the first surface (61) and in the direction of the second surface (62); weakening the nonwoven web (22) at a plurality of locations creating a plurality of weakened, melt-stabilized locations; and applying a tensioning force to the nonwoven web (22) to cause the nonwoven web (22) to rupture at the plurality of weakened, melt-stabilized locations creating a plurality of apertures in the nonwoven web (22) coincident with the plurality of weakened, melt-stabilized locations. The web (22) is particularly well suited for use as a topsheet on a disposable absorbent article.
CA002233477A 1995-09-29 1996-09-12 A method for selectively aperturing a nonwoven web exhibiting surface energy gradients Expired - Lifetime CA2233477C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/536,227 1995-09-29
US08/536,227 US5658639A (en) 1995-09-29 1995-09-29 Method for selectively aperturing a nonwoven web exhibiting surface energy gradients
PCT/US1996/014641 WO1997011661A1 (en) 1995-09-29 1996-09-12 A method for selectively aperturing a nonwoven web exhibiting surface energy gradients

Publications (2)

Publication Number Publication Date
CA2233477A1 true CA2233477A1 (en) 1997-04-03
CA2233477C CA2233477C (en) 2002-01-29

Family

ID=24137675

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002233477A Expired - Lifetime CA2233477C (en) 1995-09-29 1996-09-12 A method for selectively aperturing a nonwoven web exhibiting surface energy gradients

Country Status (7)

Country Link
US (1) US5658639A (en)
EP (1) EP0854697A1 (en)
JP (1) JP3272730B2 (en)
KR (1) KR100257439B1 (en)
AU (1) AU7158396A (en)
CA (1) CA2233477C (en)
WO (1) WO1997011661A1 (en)

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US5658639A (en) 1997-08-19
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WO1997011661A1 (en) 1997-04-03

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