WO1997011834A1 - Procede de traitement par effet de couronne de materiau hydrophobe en feuille - Google Patents

Procede de traitement par effet de couronne de materiau hydrophobe en feuille Download PDF

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Publication number
WO1997011834A1
WO1997011834A1 PCT/US1996/013227 US9613227W WO9711834A1 WO 1997011834 A1 WO1997011834 A1 WO 1997011834A1 US 9613227 W US9613227 W US 9613227W WO 9711834 A1 WO9711834 A1 WO 9711834A1
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WO
WIPO (PCT)
Prior art keywords
sheet material
corona discharge
treated
nonwoven web
layers
Prior art date
Application number
PCT/US1996/013227
Other languages
English (en)
Inventor
David Lewis Myers
Original Assignee
Kimberly-Clark Worldwide, Inc.
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
Priority claimed from US08/645,435 external-priority patent/US5688465A/en
Application filed by Kimberly-Clark Worldwide, Inc. filed Critical Kimberly-Clark Worldwide, Inc.
Priority to AU67251/96A priority Critical patent/AU6725196A/en
Publication of WO1997011834A1 publication Critical patent/WO1997011834A1/fr
Priority to MXPA/A/1998/001521A priority patent/MXPA98001521A/xx

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
    • D06M10/025—Corona discharge or low temperature plasma
    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/10—Surface shaping of articles, e.g. embossing; Apparatus therefor by electric discharge treatment
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material

Definitions

  • the present invention relates to a sheet matenal. such as a porous sheet matenal
  • Polymers are used extensively to make a vanety of products which include blown and cast films, extruded sheets, injection molded articles foams blow molded articles, extruded pipe, monofilaments and fibrous materials such as nonwoven webs
  • Some of the polymers such as polyolefins have no functionality (t e reactive groups) and are naturally hydrophobic and for many uses these properties are either a positive attribute or at least not a disadvantage
  • polystyrene foams There are a number of uses for polymers however where their hydro- phobic/nonfunctional nature either limits their usefulness or requires some effort to modify the surface characteristics of the shaped articles made therefrom
  • polyolefins such as polyethylene and polypropylene are used to manufacture polymeric fabrics which are employed in the construction of such disposable absorbent articles as diapers feminine care products incontinence products training pants wipes and the like
  • polymeric fabrics often are nonwoven webs prepared by for example such processes as meltblowmg coforming and spunbonding Frequently such polymenc fabrics need to be wettable by water Wettability can be obtained by spraying or otherwise coating (i e surface treating or topically treating) the fabric with a surfactant solution during or after its formation and then drying the web
  • topically applied surfactants are nonionic surfactants such as polyethoxylated octylphenols and condensation products of propylene oxide with propylene glycol, by way of illustration only These surfactants are effective in rende ⁇ ng normally hydrophobic polymenc fabrics wettable However the surfactant is readily removed from the fabric, often after only a single exposure to an aqueous liquid
  • Hydrophobic polymers also have been rendered wettable by passing the porous hydrophobic sheet material through a corona discharge field
  • a corona discharge field also has been used to improve ink adhesion on a surface of a film; to improve the adhesion of one film to another or to introduce functional or ionic groups on the surfaces of the fibers of filter media, films, and the like.
  • a film has been rendered porous or more porous by exposing the film to a corona discharge field. Because arcing is an intrinsic phenomenon associated with a corona discharge field, localized arcing is a frequent and common occurrence. However, localized arcing results in the formation of pinholes in the material being treated. This result often is either desired or not a disadvantage. Localized arcing is a problem, though, when porous materials are utilized and it is desired that the porosity of the material not be altered by the corona discharge treatment.
  • the present invention addresses some of the difficulties and problems discussed above by providing a method of preventing localized arcing to ground during treatment of a sheet material in a corona discharge field generated by a corona discharge apparatus having at least two electrodes, which method involves passing the sheet material to be treated through the corona discharge field, in which the sheet material to be treated is electrically isolated from the electrodes.
  • the sheet material to be treated is passed through the corona discharge field as a layer of a multilayered composite having at least three layers, in which at least one of the layers is a nonconductive sheet material situated between the sheet material to be treated and the bare metal electrode.
  • the method may be employed to treat a hydrophobic sheet material having a porosity, in which case the hydrophobic sheet material is passed through a corona discharge field generated by a corona discharge apparatus having a bare metal electrode and a dielectric covered electrode under conditions adapted to render the porous sheet wettable.
  • the hydrophobic sheet material is a layer of a multilayered composite having at least three layers, in which at least one layer is a nonconductive sheet material situated between the sheet material to be treated and the bare metal electrode and one of the at least three layers is a nonconductive, nonporous sheet material.
  • the at least one layer which is a nonconductive sheet material situated between the sheet material to be treated and the bare metal electrode also may be nonporous.
  • the sheet material may be any sheet material capable of being treated in a corona discharge field.
  • the sheet material may be nonporous or porous.
  • the sheet material may be a film.
  • the sheet material may be a fibrous web.
  • the fibrous web may be woven or nonwoven. Examples of nonwoven fibrous webs include meltblown, coformed, and spunbonded nonwoven webs.
  • the sheet material may be made of any desired material which is capable of being treated in a corona discharge field.
  • the sheet material may be made from a synthetic polymer, such as a polyolefin. Particularly desired polyolefins include polypropylene and polyethylene.
  • corona discharge field is employed with its usual meaning. Such field may be generated by any means known to those having ordinary skill in the art.
  • nonconductive with reference to a sheet material is used herein to mean that the sheet material will not conduct electricity.
  • wettable means wettable by water, e.g.. the spontaneous absorption of water by a porous material such as a nonwoven web.
  • the present invention provides a method of preventing localized arcing to ground during treatment of a sheet material in a corona discharge field generated by a corona discharge apparatus having at least two electrodes.
  • the method involves passing the sheet material to be treated through the corona discharge field, in which the sheet material to be treated is electrically isolated from the electrodes.
  • the sheet material may be any sheet material capable of being treated in a corona discharge field.
  • the sheet material may be nonporous or porous.
  • the sheet material may be a film.
  • the sheet material may be a fibrous web.
  • the fibrous web may be woven or nonwoven. Examples of nonwoven fibrous webs include, by way of illustration only, meltblown. coformed. spunbonded.
  • meltblowing references include, by way of example, U.S. Patent Nos.
  • (c) spunbonding references include, among others.
  • the sheet material may be made of any desired material which is capable of being treated in a corona discharge field.
  • the sheet material typically may be made from a synthetic polymer, which may be a thermosetting or thermoplas ⁇ tic polymer.
  • thermosetting polymers include, by way of illustration only, alkyd resins, such as phthalic anhydride-glycerol resins, maleic acid-glycerol resins, adipic acid-glycerol resins, and phthalic anhydride-pentaerythritol resins: allylic resins, in which such monomers as diallyl phthalate. diallyl isophthalate diallyl maleate. and diallyl chlorendate serve as nonvolatile cross-linking agents in polyester compounds; amino resins, such as aniline-formaldehyde resins, ethylene urea-formaldehyde resins, dicyan- diamide-formaldehyde resins.
  • alkyd resins such as phthalic anhydride-glycerol resins, maleic acid-glycerol resins, adipic acid-glycerol resins, and phthalic anhydride-pentaerythritol resins: allylic resins, in
  • thermoplastic polymers include, by way of illustration only, end- capped polyacetals, such as poly(oxymethylene) or polyformaldehyde. poly(trichloroacetaldehyde), poly(n-valeraldehyde), poly (acetaldehyde).
  • acrylic polymers such as polyacrylamide, poly (acrylic acid), poly (methacrylic acid), poly (ethyl acrylate), poly (methyl methacrylate), polyacrylonitrile.
  • fluorocarbon polymers such as poly(tetrafluoroethylene), perfluorinated ethylene-propylene copolymers, ethylene- tetrafluoroethylene copolymers, poly (chlorotrifluoroethylene), ethylene- chlorotrifluoroethylene copolymers, polyfvinylidene fluoride), polyfvinyl fluoride), and the like; polyamides, such as poly(6-aminocaproic acid) or poly(e-caprolactam), poly- (hexamethylene adipamide). poly(hexamethylene sebacamide), poly( l 1 -amino- undecanoic acid), and the like; polyaramides.
  • fluorocarbon polymers such as poly(tetrafluoroethylene), perfluorinated ethylene-propylene copolymers, ethylene- tetrafluoroethylene copolymers, poly (chlorotrifluoroethylene), ethylene- chlorotrifluoroethylene copolymers, poly
  • parylenes such as poly-p-xylylene, poly(chloro-p_-xylylene), and the like: polyaryl ethers, such as poly(oxy-2.6-dimethyl-l ,4-phenylene) or poly(p_-phenylene oxide), and the like: polyaryl sulfones, such as poly (oxy- l ,4-phenylenesulfonyl-l ,4-phenyleneoxy-1.4-phenylene- isopropylidene- 1 ,4-phenylene) , poly (sulfonyl- 1 ,4-phenyleneoxy- 1 ,4-phenylenesulfonyl- 4,4'-biphenylene), and the like: polycarbonates, such as poly (bisphenol A) or poly(carbonyldioxy-
  • polystyrenes copolymers of the foregoing, such as acrylonitrile-butadiene-styrene (ABS) copolymers, and the like; and the like.
  • the sheet material may be made of a synthetic hydrophobic polymer.
  • Hydrophobic polymers in general give contact angles with water of at least about 60° and typically have surface free energies of less than about 45 dynes cm- 1 (mjoule rrv 2 ).
  • Examples of such polymers include, by way of illustration only, aromatic polyesters, polyolefins, polytetrafluoroethylene, poly (methyl methacry ⁇ late), poly(vinyl ⁇ dene fluoride), polyamides, and polystyrenes.
  • Aromatic polyesters include, by way of example only, poly(ethylene terephthalate), polyftetramethylene terephthalate), poly (cyclohexane- 1 ,4-dimethylene terephthalate), and thermotropic liquid crystalline such as the copolymers of hydroxybenzoic acid and hydroxynaphthoic acid.
  • polyolefins examples include, again by way of illustration only, polyethylene. polypropylene, poly( l-butene), poly(2-butene). poly( l-pentene), poly(2-pentene), poly(3-methyl-l -pentene), poly(4-methyl-l -pentene). and the like In addition, such term is meant to include blends of two or more polyolefins and random and block copolymers prepared from two or more different unsaturated monomers. Because of their commercial importance the most preferred polyolefins are polyethylene and polypropylene
  • Polyamides include, by way of example only. poly(6-am ⁇ nocapro ⁇ c acid) (nylon 6), poly(hexamethylene sebacamide) (nylon 6 10) and polyfoctamethylene suberamide) (nylon 8,8)
  • both electrodes may be covered with a dielectnc sleeve.
  • one electrode may be covered with a dielectric sleeve and one electrode may be covered with a nonconductive film which may be renewable.
  • the sheet material to be treated may be passed through the corona discharge field as a layer of a multilayered composite having at least three layers, in which at least one of the layers is a nonconductive sheet matenal situated between the sheet material to be treated and the bare metal electrode.
  • the nonconductive sheet material situated between the sheet material to be treated and the bare metal electrode also may be nonporous.
  • the method may be employed to treat a hydrophobic sheet matenal having a porosity, in which case the hydrophobic sheet material is passed through a corona discharge field generated by a corona discharge apparatus having a bare metal electrode and a dielectric covered electrode under conditions adapted to render the porous sheet wettable.
  • the hydrophobic sheet material is a layer of a multilayered composite having at least three layers, in which at least one layer is a nonconductive sheet material situated between the sheet material to be treated and the bare metal electrode and one of the at least three layers is a nonconductive, nonporous sheet material.
  • the at least one layer which is a nonconductive sheet material situated between the sheet material to be treated and the bare metal electrode also may be nonporous.
  • Polypropylene film 2-mil (about 0.05-mm) thickness (Type XP715S/P. Lot #46805, Edison Plastics Co., Newport News. Virginia).
  • Polyethylene Film 1-mil (about 0.025-mm) thickness (standard linear low density polyethylene film).
  • Polytetrafluoroethylene film 2-mil (about 0.05-mm) thickness (Fisher Scientific, Atlanta, Georgia).
  • Celgard® 2500 Microporous polypropylene film Hoechst Celanese. Charlotte, North Carolina.
  • Manila Paperboard 1 1-mil (about 0.3-mm) thickness (No. 2-152C Smead Inc., Hastings, Minnesota). The paperboard is believed to be porous, although no tests were run to verify or define such porosity.
  • Aluminum Foil 1-mil (about 0.025-mm) thickness (Reynolds Metals Company, Richmond, Virginia).
  • a corona discharge field was generated by means ot a Corotec Laboratory Corona Treating Station (Corotec Corporation, Collinsville. Connecticut) equipped with a CXC-5 power supply.
  • the Corotec Laboratory Corona Treating Station generated a high voltage alternating current corona discharge.
  • the voltage of the discharge peak to peak
  • the frequency ranged from 19 kHz to 20 kHz.
  • the treater utilized two horizontally positioned, counter-rotating aluminum rolls as the electrodes.
  • the bottom roll was grounded and its surface was covered by a 2-mm thick dielectric sleeve.
  • the top roll was bare aluminum metal. The nip point formed by the two rolls provided a minimum gap of 2 mm.
  • the actual gap between the electrodes du ng Ihe treatment of a material was the sum of the thicknesses of Ihe materials being passed through the gap and the 2-mm thick dielectric cover on the Iower electrode
  • the line speed was fixed at 12 fl/min (about 6 cm/sec)
  • the power dissipated in the gap during corona discharge was indicated by an integral power meter
  • the corona energy density was a quantitative measure of power dissipated across the width of the electrodes per unit area of material being treated This is simply expressed by dividing the output power of the power supply by the width of the anode (fl) and the line speed (ft/s) Energy density was assumed to be a cumulative function of the number of passes through the discharge Typically materials were passed through the discharge from 1 to 10 times Table 1 lists energy density per pass for typical output power used in the examples
  • a critical surface tension of wetting was determined for each sample treated using a Wetting Tension Test kit Model STT 1 1 - 1 (Pillar Technologies Inc . Hartland. Wisconsin Michigan?) The critical surface tension of wetting was taken as the surface tension of the Pillar test kit fluid which was spontaneously absorbed into a porous substrates
  • the Wetting Tension Kit conforms to ASTM Standard D2578-67 Surface Analysis
  • the surfaces of treated samples were analyzed by electron spectroscopy for chemical analysis (ESCA) All analyses were carried out with a Surface Science Instruments M-Probe ESCA Spectrometer Spectral collections were performed with monochromatic aluminum x-ray excitation of an 800 square micrometer area of each sample. Differential charging of samples was compensated for by using a low energy (1 eV) flux of electrons from an electron flood gun.
  • ESCA electron spectroscopy for chemical analysis
  • Samples of 0.5 ounce per square yard or osy (about 17 grams per square meter or gsm) polypropylene meltblown nonwoven webs were corona discharge treated at corona energy densities per pass ranging from 500 to 2500 watt sec ft 2 (about 5.38 to 26.9 kjoule rrr 2 ).
  • Each meltblown sample was mounted as a multilayered structure in which 1 to 5 layers of material were overlayed or stacked to form a composite sample for corona treatment. No adhesive was applied between layers of the laminates: thus. after corona discharge treatment, the layers were easily separable.
  • the multilayered composites are referred to or described layer by layer. beginning with the layer closest to the top or bare metal electrode of the Treating Station and ending with the layer closest to the bottom electrode of the treater. i.e., the electrode covered with the dielectric sleeve. While in the examples a maximum of five layers were used, this number of layers should not be construed as limiting in any way either the spirit or the scope of the invention.
  • the multilayered composite were corona discharge treated by feeding the materials through the nip formed between the upper and Iower electrodes of the Treating Station.
  • the severity of treatment was varied by increasing the corona output power and by increasing the number of passes through the discharge field at a fixed corona energy density.
  • Table 2 The numerous composite configurations examined are summarized in Table 2. Included in Table 2 are data indicating the observance of pinholes in the corona treated material and the critical surface tension for wetting (CSTW) of the treated meltblown nonwoven web for each configuration examined.
  • the CSTW was evaluated on both the top and bottom sides of each fabric. In no case was the CSTW of the top side (the side closest to the bare metal electrode of the Treating Station) found to be different from that observed on the bottom side (the side closest to the dielectric- covered electrode of the Treating Station). All samples were passed through the corona discharge field a total of ten times at a fixed corona energy density of 1500 watt sec ft- 2 (about 16.2 kjoule i ⁇ v 2 ). The following abbreviations are employed in all tables:
  • MB Polypropylene meltblown nonwoven web
  • MPB Manila paperboard
  • the effect of output power of the corona treater on the CSTW and the surface composition of the meltblown nonwoven web was evaluated using the MPB/MB/PPF configuration described above.
  • the surface composition was determined by ESCA analysis of the nonwoven web after treatment and is herein expressed as the ratio of the atomic percent of oxygen to that of carbon (O/C ratio). In all cases the samples were passed through the corona discharge field a total of five limes. The results are summarized in Table 4.
  • both the surface O/C ratio and the CSTW increased with increasing corona power. Except for the O/C ratio at 400 watts or joule sec 1 , the increases in both the O/C ratio and CSTW appear to be roughly linear at output power rating increases above 100 watts or joule sec 1 .
  • Effect of Corona Treatment Severity The effect of corona treatment severity (time) was evaluated by increasing the number of passes through a corona discharge field at fixed power. In this case the corona power was set at 300 watts or joule sec ', corresponding to a corona energy density of 1500 watt sec fl 2 (about 16.2 kjoule m 2 ) per pass. The results are summarized in Table 5.
  • the CSTW increased with the number of passes through the corona field, although fewer than about five passes had little apparent effect on the CSTW value.
  • the surface O/C ratio appeared to reach a maximum after about 5 passes.
  • the corona treatment of the polypropylene meltblown nonwoven web was examined as a function of the electrical conductivity of the film layer used in the preparation of the multilayered composite.
  • a 1-mil (about 0.025-mm) thick aluminum foil was used as a conductive film and several polymer films were evaluated as dielectric film layers.
  • the corona treatment conditions were 1500 watt sec ft- 2 (about 16.2 (kjoule r ⁇ v 2 ) per pass and 10 passes.
  • Conductive Film Three samples of the meltblown nonwoven web were treated in multilayered composites which included an aluminum foil conductive film layer. In the first, a section of the meltblown web was mounted on manila paperboard with poly ⁇ propylene film covering one half and aluminum foil the other.
  • the sample was constructed such that, as the sample passed through the corona field, half of the electrode pair would "see” the polypropylene film and the other half would "see” the aluminum foil.
  • the juncture between the two types of film was parallel to the direction of motion of the composite through the corona discharge apparatus.
  • both sides of the meltblown nonwoven web had a CSTW value of 60 dynes cm- 1 (mjoule r ⁇ 2 ). while only the aluminum foil side had pinholes.
  • a third sample was prepared wherein a second polypropylene film layer was added between the manila paperboard and the nonwoven web. In this case, no pin holes were observed in either the aluminum foil covered or polypropylene film covered sides, and the CSTW value was the same on each side.
  • nonconductive films used as layers in multilayered composites included polytetrafluoroethylene (PTFE), polyethylene (PE). and Celgard® 2500 microporous polypropylene.
  • PTFE polytetrafluoroethylene
  • PE polyethylene
  • Celgard® 2500 microporous polypropylene The sample configuration was MPB/MB/Nonconduc- tive Film.
  • the corona discharge treatment of microporous films was demonstrated using sample of Celgard® 2500 microporous polypropylene film.
  • the microporous film was treated in a manner similar to that described in Example 1.
  • the corona treatment conditions were 1500 watt sec ft- 2 per pass and 10 passes.
  • the Celgard film was treated either by itself or as a multilayered composite with PP film. PE film, and PTFE film.
  • Treatment of the Celgard® 2500 microporous polypropylene film by itself produced a material with pinholes over greater than 90 percent of its surface.
  • the broad applicability of the multilayered composite approach to controlling pinhole formation during corona treatment of nonwoven webs was further demonstrated by examining higher basis weight polypropylene meltblown webs and a series of nonwoven webs made from polyethylene.
  • the corona treatment conditions were 1500 watt sec ft 2 per pass and 10 passes.
  • the MPB/Nonwoven Web/PPF sample configuration was used for each nonwoven web.
  • the nonwoven webs studied were as follows: A - 1.0 osy (about 34 gsm) polypropylene meltblown nonwoven web.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Textile Engineering (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

L'invention porte sur un procédé permettant d'empêcher l'apparition, durant le traitement d'un matériau en feuille, d'un arc électrique localisé vers la terre dans le champ d'une décharge par effet de couronne produit par un appareil à décharge par effet de couronne, comportant deux électrodes au moins. Le procédé consiste à faire passer le matériau en feuille à traiter dans un champ de décharge par effet de couronne, ledit matériau étant isolé des électrodes. Lorsque l'appareil à décharge par effet de couronne possède une électrode en métal nu et une électrode recouverte d'un matériau diélectrique, on fait passer le matériau en feuille à traiter dans le champ de décharge par effet de couronne ce matériau se présentant sous la forme d'une couche d'un matériau composite multicouches comportant trois couches au moins, l'une au moins de ces couches, une feuille non conductrice, se trouvant entre le matériau en feuille à traiter et l'électrode de métal nu. On peut faire appel à ce procédé pour traiter un matériau en feuille hydrophobe poreux en faisant alors passer ledit matériau dans un champ de décharge par effet de couronne produit par un appareil à décharge par effet de couronne possédant une électrode en métal nu et une électrode recouverte d'un matériau diélectrique dans des conditions propices à rendre la feuille poreuse humidifiable. Ce matériau en feuille hydrophobe est une couche non conductrice d'un matériau composite multicouches comportant trois couches au moins, l'une d'elles, au moins, étant une feuille non conductrice se trouvant entre le matériau en feuille à traiter et l'électrode de métal nu tandis que l'une au moins des trois couches étant une feuille non conductrice et non poreuse.
PCT/US1996/013227 1995-09-29 1996-08-16 Procede de traitement par effet de couronne de materiau hydrophobe en feuille WO1997011834A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU67251/96A AU6725196A (en) 1995-09-29 1996-08-16 Method of corona treating a hydrophobic sheet material
MXPA/A/1998/001521A MXPA98001521A (en) 1995-09-29 1998-02-25 Method of treatment with crown of a hidrofob leaf material

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US453495P 1995-09-29 1995-09-29
US60/004,534 1995-09-29
US08/645,435 1996-05-13
US08/645,435 US5688465A (en) 1996-05-13 1996-05-13 Method of corona treating a hydrophobic sheet material

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WO1997011834A1 true WO1997011834A1 (fr) 1997-04-03

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005115063A1 (fr) * 2004-05-20 2005-12-01 Universidade Do Minho Traitement continu et semi-continu de materiaux textiles utilisant une decharge par effet couronne
US7700500B2 (en) 2002-12-23 2010-04-20 Kimberly-Clark Worldwide, Inc. Durable hydrophilic treatment for a biodegradable polymeric substrate

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US3067119A (en) * 1960-02-11 1962-12-04 American Viscose Corp Surface treatment of films
DE1460636A1 (de) * 1962-08-16 1969-04-30 Robert Levaux Behandlungsverfahren fuer Textilwerkstoffe und Vorrichtung zur Durchfuehrung des Verfahrens
US3779882A (en) * 1971-04-01 1973-12-18 Union Carbide Corp Electrode method for the surface treatment of thermoplastic materials
FR2337022A1 (fr) * 1975-12-30 1977-07-29 Windmoeller & Hoelscher Dispositif de traitement de tissus faits de bandelettes
EP0060687A2 (fr) * 1981-03-12 1982-09-22 JOHNSON & JOHNSON MEDICAL, INC. Procédé de fabrication d'électrets fibreux
DE3115958A1 (de) * 1981-04-22 1982-12-16 Hahne, Ernst August, 4123 Allschwill "verfahren zum anfeuchten eines flexiblen vorzugsweise bahnfoermigen... und vorrichtung zur durchfuehrung des verfahrens"
JPS58222118A (ja) * 1982-06-17 1983-12-23 Mitsubishi Paper Mills Ltd コロナ放電処理方法及び装置
WO1984003193A1 (fr) * 1983-02-04 1984-08-16 Minnesota Mining & Mfg Procede et appareil pour fabriquer un materiau filtrant a electret

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3067119A (en) * 1960-02-11 1962-12-04 American Viscose Corp Surface treatment of films
DE1460636A1 (de) * 1962-08-16 1969-04-30 Robert Levaux Behandlungsverfahren fuer Textilwerkstoffe und Vorrichtung zur Durchfuehrung des Verfahrens
US3779882A (en) * 1971-04-01 1973-12-18 Union Carbide Corp Electrode method for the surface treatment of thermoplastic materials
FR2337022A1 (fr) * 1975-12-30 1977-07-29 Windmoeller & Hoelscher Dispositif de traitement de tissus faits de bandelettes
EP0060687A2 (fr) * 1981-03-12 1982-09-22 JOHNSON & JOHNSON MEDICAL, INC. Procédé de fabrication d'électrets fibreux
DE3115958A1 (de) * 1981-04-22 1982-12-16 Hahne, Ernst August, 4123 Allschwill "verfahren zum anfeuchten eines flexiblen vorzugsweise bahnfoermigen... und vorrichtung zur durchfuehrung des verfahrens"
JPS58222118A (ja) * 1982-06-17 1983-12-23 Mitsubishi Paper Mills Ltd コロナ放電処理方法及び装置
WO1984003193A1 (fr) * 1983-02-04 1984-08-16 Minnesota Mining & Mfg Procede et appareil pour fabriquer un materiau filtrant a electret

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* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 071 (C - 217) 3 April 1984 (1984-04-03) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7700500B2 (en) 2002-12-23 2010-04-20 Kimberly-Clark Worldwide, Inc. Durable hydrophilic treatment for a biodegradable polymeric substrate
WO2005115063A1 (fr) * 2004-05-20 2005-12-01 Universidade Do Minho Traitement continu et semi-continu de materiaux textiles utilisant une decharge par effet couronne

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MX9801521A (es) 1998-05-31
CA2228606A1 (fr) 1997-04-03
AU6725196A (en) 1997-04-17

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