WO2015166435A1 - Traitement hydrophobe sur non-tissé hydrophile - Google Patents

Traitement hydrophobe sur non-tissé hydrophile Download PDF

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Publication number
WO2015166435A1
WO2015166435A1 PCT/IB2015/053124 IB2015053124W WO2015166435A1 WO 2015166435 A1 WO2015166435 A1 WO 2015166435A1 IB 2015053124 W IB2015053124 W IB 2015053124W WO 2015166435 A1 WO2015166435 A1 WO 2015166435A1
Authority
WO
WIPO (PCT)
Prior art keywords
barrier material
hydrophobic
fibers
water
composition
Prior art date
Application number
PCT/IB2015/053124
Other languages
English (en)
Inventor
Karen Meloy GOEDERS
Marsha R. FORTHOFER
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
Application filed by Kimberly-Clark Worldwide, Inc. filed Critical Kimberly-Clark Worldwide, Inc.
Publication of WO2015166435A1 publication Critical patent/WO2015166435A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/64—Inorganic compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002—Tissue paper; Absorbent paper
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/3154—Of fluorinated addition polymer from unsaturated monomers

Definitions

  • the present disclosure relates to the use of a hydrophobic chemistry applied to a hydrophilic fibrous material to create liquid barrier properties in an otherwise wettable nonwoven by creating a film-like structure between the fibers. This yields a hydrophilic substrate that acts like a film while still being air permeable and exceeding the breathability seen in standard breathable outer cover films.
  • the present disclosure provides a liquid-impermeable barrier material including a hydrophilic nonwoven web having two surfaces, the nonwoven web including fibers; and a hydrophobic composition disposed on a surface, wherein the barrier material is breathable.
  • the barrier material exhibits a positive hydrohead value.
  • the hydrophobic composition can include a hydrophobic component selected from the group consisting of fluorinated polymers, perfluorinated polymers, and mixtures thereof.
  • the barrier material can include a hydrophilic surface opposite the surface having the hydrophobic composition.
  • the nonwoven web can include tissue, cellulose, or other suitable material.
  • Figure 1 illustrates the contact angle exhibited by various hydrophobic treatments
  • the film can have a density of about 1.4 grams per cubic centimeter ("g/cm 3 ") or less, in some aspects about 1.1 g/cm 3 or less, in some aspects from about 0.4 g/cm 3 to about 1.0 g/cm 3 , and in some aspects, from about 0.5 g/cm 3 to about 0.95 g/cm 3 .
  • g/cm 3 grams per cubic centimeter
  • Nonwoven webs have been formed from many processes, such as, for example, meltblowing processes, spunbonding processes, air-laying processes, coforming processes and bonded carded web processes.
  • the basis weight of nonwoven webs is usually expressed in ounces of material per square yard (osy) or grams per square meter (gsm) and the fiber diameters are usually expressed in microns, or in the case of staple fibers, denier. It is noted that to convert from osy to gsm, multiply osy by 33.91.
  • substantially continuous fibers is intended to mean fiber that have a length that is greater that the length of staple fibers.
  • the term is intended to include fibers that are continuous, such as spunbond fibers, and fibers that are not continuous, but have a defined length greater than about 150 millimeters.
  • staple fibers means fibers that have a fiber length generally in the range of about 0.5 to about 150 millimeters.
  • Staple fibers can be cellulosic fibers or non-cellulosic fibers.
  • suitable non-cellulosic fibers include, but are not limited to, polyolefin fibers, polyester fibers, nylon fibers, polyvinyl acetate fibers, and mixtures thereof.
  • Cellulosic staple fibers include for example, pulp, thermomechanical pulp, synthetic cellulosic fibers, modified cellulosic fibers, and the like. Cellulosic fibers can be obtained from secondary or recycled sources.
  • Modified cellulosic fibers are generally are composed of derivatives of cellulose formed by substitution of appropriate radicals (e.g., carboxyl, alkyl, acetate, nitrate, etc.) for hydroxyl groups along the carbon chain.
  • appropriate radicals e.g., carboxyl, alkyl, acetate, nitrate, etc.
  • the present disclosure relates to a surface of a hydrophilic substrate, or the substrate itself, exhibiting hydrophobic characteristics when treated with certain compositions.
  • the hydrophobicity can be applied either over the entire surface, patterned throughout or on the substrate material, and/or directly penetrated through the z-directional thickness of the substrate material.
  • Tissue-based materials tend to be less expensive than polymeric laminates and films.
  • the hydrophobic component is a hydrophobic polymer that is dispersible in water to form the basic elements of the hydrophobic properties of the present disclosure.
  • a hydrophobic component of this disclosure can include, but is not limited to, fluorinated or perfluorinated polymers.
  • fluorinated or perfluorinated polymers due to low degree of water dispersibility, the fluorinated or perfluorinated polymer can need to be modified by introducing a comonomer onto their molecular structure.
  • Suitable comonomers include, but are not limited to, ethylenically unsaturated monomers including functional groups that are capable of being ionized in water.
  • ethylenically unsaturated carboxylic acid such as acrylic acid.
  • the solid components of the present disclosure can be present in an amount from about 1.0% to about 3.0%, by weight of the solution. Such an amount is suitable for spray applications where higher concentrations of polymer can lead to either viscoelastic behavior, resulting in either clogging of the spray nozzle or incomplete atomization and fiber formation, or dramatic increases in dispersion viscosity and thus nozzle clogging. It should be noted that this range is not fixed and that it is a function of the materials being utilized and the procedure used to prepare the dispersion. When a higher amount of the polymer is used, the surface structure is less desirable as it lacks the proper texture to be hydrophobic. When a lower amount of the polymer is used, the binding is less desirable as the coating behaves more so as a removable powder coating.
  • the formulation used in treating the surface of the present disclosure eliminates the use of an organic solvent by carefully selecting the appropriate combination of elements to impart the hydrophobic characteristics.
  • the non-organic solvent is water. Any type of water can be used; however, demineralized or distilled water can be opted for use during the manufacturing process for enhanced capabilities.
  • the use of water helps to reduce the safety concerns associated with making commercial scale formulations including organic solvents. For example, due to the high volatility and flammability of most organic solvents, eliminating such use in the composition reduces production safety hazards.
  • the nonwoven fabric can also be bonded using techniques well known in the art to improve the durability, strength, hand, aesthetics, texture, and/or other properties of the fabric.
  • the nonwoven fabric can be thermally (e.g., pattern bonded, through-air dried), ultrasonically, adhesively and/or mechanically (e.g. needled) bonded.
  • various pattern bonding techniques are described in U.S. Patent No. 3,855,046 to Hansen; U.S. Patent No. 5,620,779 to Levy, et al.; U.S. Patent No. 5,962,112 to Haynes, et al.; U.S. Patent No. 6,093,665 to Sayovitz, et al.; U.S. Design Patent No. 428,267 to Romano, et al.; and U.S. Design Patent No. 390,708 to Brown.
  • Modified cellulosic fibers are generally are composed of derivatives of cellulose formed by substitution of appropriate radicals (e.g., carboxyl, alkyl, acetate, nitrate, etc.) for hydroxyl groups along the carbon chain.
  • the substrate of the present disclosure can be prepared solely from thermoplastic fibers or can contain both thermoplastic fibers and non-thermoplastic fibers.
  • the thermoplastic fibers make up from about 10% to about 90%, by weight of the substrate.
  • the substrate contains between about 10% and about 30%, by weight, thermoplastic fibers.
  • Uncreped through- air-drying generally involves the steps of: (1) forming a furnish of cellulosic fibers, water, and optionally, other additives; (2) depositing the furnish on a traveling foraminous belt, thereby forming a fibrous web on top of the traveling foraminous belt; (3) subjecting the fibrous web to through-air-drying to remove the water from the fibrous web; and (4) removing the dried fibrous web from the traveling foraminous belt.
  • aqueous dispersions of the present disclosure was to produce extremely fine droplets during atomization, and to apply only very thin coatings, so as not to saturate the substrate and re-orient hydrogen bonding within the substrate that, after drying, would cause cellulosic substrates (e.g. paper towel) to become stiff.
  • Liquid repellency of substrates before and after coating can be characterized by a hydrostatic pressure setup that determines liquid penetration pressures (in cm of liquid). Performance characterization
  • a first test is made of the WVTR of the guard film and air gap between an evaporator assembly that generates 100 percent relative humidity. Water vapor diffuses through the air gap and the guard film and then mixes with a dry gas flow that is proportional to water vapor concentration.
  • the electrical signal is routed to a computer for processing. The computer calculates the transmission rate of the air gap and guard film and stores the value for further use.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

L'invention concerne un matériau de barrière imperméable aux liquides, qui comprend un voile de non-tissé hydrophile ayant deux surfaces, le voile de non-tissé comprenant des fibres ; et une composition hydrophobe disposée sur une surface, le matériau de barrière étant respirant. Le matériau de barrière présente une valeur de pression hydraulique positive. La composition hydrophobe peut comprendre un élément hydrophobe choisi dans le groupe constitué de polymères fluorés, de polymères perfluorés et de mélanges de ces derniers. Le matériau de barrière peut comprendre une surface hydrophile opposée à la surface ayant la composition hydrophobe. Le voile de non-tissé peut comprendre un tissu, du cellulose ou un autre matériau approprié. Un matériau de barrière comprend une surface hydrophobe et comprend un substrat de non-tissé hydrophile traité avec une composition comprenant un élément hydrophobe et de l'eau.
PCT/IB2015/053124 2014-05-02 2015-04-29 Traitement hydrophobe sur non-tissé hydrophile WO2015166435A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/268,071 2014-05-02
US14/268,071 US20150315749A1 (en) 2014-05-02 2014-05-02 Hydrophobic treatment on hydrophilic nonwoven

Publications (1)

Publication Number Publication Date
WO2015166435A1 true WO2015166435A1 (fr) 2015-11-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2015/053124 WO2015166435A1 (fr) 2014-05-02 2015-04-29 Traitement hydrophobe sur non-tissé hydrophile

Country Status (2)

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US (1) US20150315749A1 (fr)
WO (1) WO2015166435A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE538770C2 (sv) * 2014-05-08 2016-11-15 Stora Enso Oyj Förfarande för framställning av ett termoplastiskt fiberkompositmaterial och en väv
CN114763631A (zh) * 2021-01-11 2022-07-19 哈尔滨汇隽医药科技有限公司 一种可用于医用敷料的非织造材料

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050245159A1 (en) * 2004-02-11 2005-11-03 Chmielewski Harry J Breathable barrier composite with hydrophobic cellulosic fibers
US20050274470A1 (en) * 2004-06-10 2005-12-15 Kimberly-Clark Worldwide, Inc. Apertured tissue products
US20100069864A1 (en) * 2006-12-11 2010-03-18 Sca Hygiene Products Ab Absorbent article with a strongly hydrophobic layer
US20120225202A1 (en) * 2003-06-19 2012-09-06 Dah Yu Cheng Method of producing a porous membrane and waterproof, highly breathable fabric including the membrane
US20130029551A1 (en) * 2011-07-28 2013-01-31 Jian Qin Superhydrophobic surfaces

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150275419A1 (en) * 2014-03-31 2015-10-01 Kimberly-Clark Worldwide, Inc. Tissue-based water barrier material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120225202A1 (en) * 2003-06-19 2012-09-06 Dah Yu Cheng Method of producing a porous membrane and waterproof, highly breathable fabric including the membrane
US20050245159A1 (en) * 2004-02-11 2005-11-03 Chmielewski Harry J Breathable barrier composite with hydrophobic cellulosic fibers
US20050274470A1 (en) * 2004-06-10 2005-12-15 Kimberly-Clark Worldwide, Inc. Apertured tissue products
US20100069864A1 (en) * 2006-12-11 2010-03-18 Sca Hygiene Products Ab Absorbent article with a strongly hydrophobic layer
US20130029551A1 (en) * 2011-07-28 2013-01-31 Jian Qin Superhydrophobic surfaces

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