+

WO2008018920A2 - Procédé totalement intégré pour la fabrication de produits absorbants - Google Patents

Procédé totalement intégré pour la fabrication de produits absorbants Download PDF

Info

Publication number
WO2008018920A2
WO2008018920A2 PCT/US2007/006861 US2007006861W WO2008018920A2 WO 2008018920 A2 WO2008018920 A2 WO 2008018920A2 US 2007006861 W US2007006861 W US 2007006861W WO 2008018920 A2 WO2008018920 A2 WO 2008018920A2
Authority
WO
WIPO (PCT)
Prior art keywords
absorbent
absorbent garment
waste
garment
compatible
Prior art date
Application number
PCT/US2007/006861
Other languages
English (en)
Other versions
WO2008018920A3 (fr
Inventor
John D. Litvay
Original Assignee
Litvay John D
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 Litvay John D filed Critical Litvay John D
Publication of WO2008018920A2 publication Critical patent/WO2008018920A2/fr
Publication of WO2008018920A3 publication Critical patent/WO2008018920A3/fr

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
    • 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
    • A61F13/534—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
    • A61F13/537—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • 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
    • A61F13/15203—Properties of the article, e.g. stiffness or absorbency
    • 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
    • A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
    • 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
    • A61F13/15804—Plant, e.g. involving several steps
    • 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
    • A61F13/534—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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4274—Rags; Fabric scraps
    • 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
    • A61F2013/530131—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 being made in fibre but being not pulp
    • A61F2013/530226—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 being made in fibre but being not pulp with polymeric fibres
    • A61F2013/530233—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 being made in fibre but being not pulp with polymeric fibres being thermoplastic fibres

Definitions

  • absorbent products in the emerging market countries face an enormous challenge in trying to find ways to produce lower cost products.
  • the cost of raw materials comprise up to seventy to eighty percent of the cost to manufacture such products.
  • a minimum amount of conventional materials need to be employed in order to produce a functional absorbent product . If a manufacturer reduces the amount of material used beyond this minimum, the functionality of the product is greatly diminished.
  • Absorbent products such as baby diapers, feminine hygiene pads and adult incontinent products are typically constructed of several different types of materials. These products typically consist of a permeable non-woven top sheet, an impermeable back sheet and an absorbent core sandwiched there between.
  • the absorbent core typically consists of wood fluff and a water- absorbing polymer, which is prepared from monomers of acrylic acid.
  • the present invention provides an absorbent product, such as disposable diapers, incontinent pads, sanitary napkins that has an absorbent core that comprises recycled synthetic material.
  • the core is produced from the waste created in the manufacturing process of previously produced absorbent products.
  • the present invention comprises a method of producing absorbent products, including the steps of capturing the waste consisting of "compatible” components, shredding the waste, pelletising the waste and melting and extruding the "compatible” waste into synthetic core fiber for use in new absorbent products.
  • the present invention comprises a method of producing absorbent products, including the steps of capturing the waste consisting of "compatible" and
  • incompatible components shredding the waste, separating the waste into compatible and incompatible components, turning the compatible waste into pellets and melting and extruding the "compatible" waste into synthetic core fiber for use in new absorbent products.
  • Figure 1 illustrates a top view of a conventional diaper showing the absorbent synthetic core and leg cut outs that consist of compatible material.
  • Figure 2 illustrates the manufacturing steps for the manufacture of an absorbent garment with an absorbent core with recycled synthetic fibers.
  • the invention relates to the recycling of absorbent garment manufacture waste materials into continuous synthetic core fibers which are used to produce new absorbent cores.
  • the types of absorbent products that can be produced include disposable diapers, incontinent pads, sanitary napkins wherein the absorbent core comprises recycled synthetic materials.
  • FIGURE 1 is a plan view of a conventional diaper Ln its uncontracted state with the center oval area showing the absorbent core 10 and diaper chassis 20 leg cut out 30 which consists of compatible material.
  • Typical diaper construction consists of a liquid pervious top sheet, a liquid impermeable back sheet and an absorbent core sandwiched there between. It is understood that a variety of absorbent garment constructions know in the art could incorporate the absorbent core of the present invention.
  • FIGURE 2 shows the manufacturing steps involved in collecting, sorting (for waste that contains both compatible and incompatible material), shredding, forming pellets, melting and extruding to produce recycled continuous synthetic fiber. Said fiber can then be used in manufacturing new absorbent cores.
  • top sheet of the present invention can be any permeable polymeric plastic non-woven sheet known in the state of the art.
  • a suitable top sheet may be made from apertured plastic films, polyolefin fibers (e.g. polyethylene or polypropylene fibers) or combinations thereof. It is understood that additional layers may be present between the absorbent core and the top sheet. In additional it is understood that such back sheet needs to be a "compatible" material.
  • the "absorbent core” can be any synthetic material known in the state of the art that can be made into tow and recycled. Such materials include synthetic materials such as polyolefins. Polyolefins include polypropylene and polyethylene. Polypropylene is preferred because it has been shown that polypropylene undergoes no significant change in mass and alterations to the polymer chains after repeated extrusion. The application properties of the material are almost unaffected nor degraded.
  • the absorbent core of the present invention may also include a "wrap" that encases the synthetic fiber core and super absorbent particulate. Preferably the wrap should be a polypropylene non-woven material for purposes of recycling.
  • the absorbent core of the present invention may include a transfer or acquisition layer interposed between the absorbent core (or wrap if used) and the top sheet. It is preferred that the transfer layer be made of polypropylene as well for purposes of recycling.
  • the super absorbent particulate of the present invention can be any conventional water- swellable material such as synthetic hydrogel polymer. These include polyacrylic acids.
  • the "back sheet” of the present invention can be any impermeable polymeric plastic and/or non-woven sheet known in the state of the art.
  • a suitable back sheet may be made from films polyethylene and polypropylene and blends of these materials. It is understood that additional layers may be present between the absorbent core and the back sheet. In additional it is understood that such back sheet needs to a "compatible' material.
  • “waste” refers to all material that contains some level of “compatible” material as defined herein.
  • “Compatible” material refers to all material that can be recycled into new continuous synthetic fibers (tow) that can then be used to produce a matrix for absorbent cores.
  • Compatible material includes non- woven leg cut out material, bag trim, left over material from stub rolls and shrink wrap. The expectation is that this compatible material will have a melt point lower than virgin resin.
  • “Virgin resin” meaning start source material that has not be made into any product.
  • “Incompatible” material includes all material that cannot be recycled into new continuous synthetic fibers. Such material includes super absorbent particulate, box corrugate and other cellulose material.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Epidemiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Manufacturing & Machinery (AREA)
  • Textile Engineering (AREA)
  • Botany (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

La présente invention concerne un produit absorbant, tel que des couches jetables, des couches pour incontinence et des serviettes hygiéniques possédant un noyau absorbant qui comprend une matière synthétique recyclée. Le noyau est obtenu à partir des déchets produits dans le procédé de fabrication de produits absorbants préalablement fabriqués.
PCT/US2007/006861 2006-08-04 2007-03-20 Procédé totalement intégré pour la fabrication de produits absorbants WO2008018920A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US83545206P 2006-08-04 2006-08-04
US60/835,452 2006-08-04

Publications (2)

Publication Number Publication Date
WO2008018920A2 true WO2008018920A2 (fr) 2008-02-14
WO2008018920A3 WO2008018920A3 (fr) 2008-03-27

Family

ID=39033440

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/006861 WO2008018920A2 (fr) 2006-08-04 2007-03-20 Procédé totalement intégré pour la fabrication de produits absorbants

Country Status (1)

Country Link
WO (1) WO2008018920A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9718949B2 (en) 2010-08-20 2017-08-01 Becton, Dickinson And Company Recycled resin compositions and disposable medical devices made therefrom
US11324861B2 (en) 2011-11-04 2022-05-10 Becton, Dickinson And Company Recycled resin compositions and disposable medical devices made therefrom

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703347A (en) * 1970-08-27 1972-11-21 Eastman Kodak Co Waste recovery of thermoplastic continuous filamentary material
US20040158212A1 (en) * 2003-02-10 2004-08-12 The Procter & Gamble Company Disposable absorbent article comprising a durable hydrophilic core wrap
US7998384B2 (en) * 2001-08-02 2011-08-16 Fiberweb Simpsonville, Inc. Spunbond nonwoven fabrics from reclaimed polymer and the manufacture thereof
US6802353B2 (en) * 2001-10-10 2004-10-12 The Procter & Gamble Company Apparatus for recycling waste from an absorbent article processing line
US20050215962A1 (en) * 2002-01-16 2005-09-29 John Litvay Tow-based absorbent articles with a single casing sheet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9718949B2 (en) 2010-08-20 2017-08-01 Becton, Dickinson And Company Recycled resin compositions and disposable medical devices made therefrom
US11324861B2 (en) 2011-11-04 2022-05-10 Becton, Dickinson And Company Recycled resin compositions and disposable medical devices made therefrom

Also Published As

Publication number Publication date
WO2008018920A3 (fr) 2008-03-27

Similar Documents

Publication Publication Date Title
WO2008018921A1 (fr) Produit absorbant ayant un noyau à gradient unifié
CN1547631B (zh) 高度伸长的有孔无纺织网及其制造方法
US7767598B2 (en) Diaper providing pressure insensitive liquid handling
EP1504740B1 (fr) Couche de collecte liée par une colle de latex avec des caractéristiques de manipulation de liquides insensible à la température
EP3063323B1 (fr) Matériau de bande non tissée comprenant des fibres constituées de polyester recyclé, et procédés de production
EP1257703B1 (fr) Bandes non tissees thermoplastiques biodegradables destinees a la gestion des fluides
US20150123304A1 (en) Nonwoven web material including fibers formed of rcecycled polyester, and methods for producing
JPH11508789A (ja) 水分解性の多成分ファイバ及び不織布
WO2005016206A1 (fr) Couche d'acquisition collee au latex presentant des propritetes de traitement de liquide insensibles a la temperature
CN1202100A (zh) 对无纺织物网进行选择性开孔的方法
JPH09510262A (ja) 生分解性フィブリルを製造するための▲攪▼拌方法、生分解性フィブリルからなる不織布、及び不織布からなる物品
JP2008532649A (ja) 平坦状に成形された吸収性コア構造体
JP2006247396A (ja) 吸収性コア構造体を製造する方法
HUT69532A (en) Process for the production of an absorbent thread material
KR20070097449A (ko) 집합체 클러스터를 갖는 흡수성 구조체
WO2008018920A2 (fr) Procédé totalement intégré pour la fabrication de produits absorbants
JPH09276331A (ja) 吸収性物品
WO2001048291A1 (fr) Bandes non tissees biodegradables pour gestion de fluides
KR910005921B1 (ko) 흡수성 물품
WO2007111872A2 (fr) Produit absorbant contenant de la poudre sap
US7326747B2 (en) Internal wetting agent for use in manufacture of polymeric films and fabrics for disposable absorbent articles
EP3127674B1 (fr) Procédé et installation pour l'obtention des particules de polymères superabsorbants à sec (sap) de produits hygiéniques utilisés
CN119031896A (zh) 容易再循环的吸收性物品、以及再生原料、纤维和纤维制品的制造方法

Legal Events

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

Ref document number: 07753486

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: RU

122 Ep: pct application non-entry in european phase

Ref document number: 07753486

Country of ref document: EP

Kind code of ref document: A2

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载