WO2000012801A1 - Tissu polyolefinique non tisse aux proprietes hydrophiles - Google Patents

Tissu polyolefinique non tisse aux proprietes hydrophiles Download PDF

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Publication number
WO2000012801A1
WO2000012801A1 PCT/US1999/018030 US9918030W WO0012801A1 WO 2000012801 A1 WO2000012801 A1 WO 2000012801A1 US 9918030 W US9918030 W US 9918030W WO 0012801 A1 WO0012801 A1 WO 0012801A1
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Prior art keywords
nonwoven web
hydrophilic
polymer
reaction product
polyolefin
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PCT/US1999/018030
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English (en)
Inventor
Xin Ning
James Hongxue Wang
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Kimberly-Clark Worldwide, Inc.
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Publication date
Application filed by Kimberly-Clark Worldwide, Inc. filed Critical Kimberly-Clark Worldwide, Inc.
Priority to AU53449/99A priority Critical patent/AU5344999A/en
Publication of WO2000012801A1 publication Critical patent/WO2000012801A1/fr

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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
    • A61F13/51—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 outer layers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B46/00—Surgical drapes
    • A61B46/40—Drape material, e.g. laminates; Manufacture thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/30—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising olefins as the major constituent
    • 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
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series

Definitions

  • This invention relates to chemically modified polyolefm-based nonwoven fabrics having enhanced hydrophilic properties.
  • Maleated polyolefms are typically hydrophobic. These resins are commonly used as compatibilizers and/or adhesives between polar materials, such as nylon or ethylene vinyl alcohol, and polyolefms.
  • polar materials such as nylon or ethylene vinyl alcohol
  • an anhydride such as maleic anhydride is chemically reacted (i.e., grafted) onto the polyolefin backbone chain using heat and/or a catalyst. When exposed to a polar material in the presence of heat, the grafted polyolefin forms a chemical linkage to the polar material resulting in bonding and compatibilization.
  • maleated polyolefms are disclosed in U.S. Patent 5,721,315, issued to Evans et al. These uses include engineering plastics which are materials for structural members in the fields of transport machines (automobiles, ships and the like), tools, appliances, sporting goods, leisure goods, connectors, and tubes.
  • Nonwoven fibrous webs can include spunbond webs, meltblown webs, and bonded carded webs, for instance, and laminates of them. These webs are used in a wide variety of absorbent materials and apparel including diapers, tampons, medical garments, surgical gloves, caps, aprons, and sterilization wraps. When used in absorbent materials, the nonwoven webs may form part of the topsheet, backing or similar structural material and a breathable film laminated to the web may provide liquid barrier and moisture vapor transmission. When used in medical apparel, specific laminates of nonwoven webs may provide structural integrity and breathability as well as barrier to liquids, bacteria and viruses.
  • Polyolefms used to make nonwoven webs are typically hydrophobic.
  • a nonwoven web When a nonwoven web is intended to transmit or channel liquid, such as in a topsheet of an absorbent structure, the hydrophobic nature of the material may act as a hindrance.
  • Various surface treatments of nonwoven webs are known for improving their hydrophilicity, rendering them more wettable to aqueous liquids. These surface treatments have certain disadvantages, including a potential to leave the nonwoven web and escape to the wearer's skin or the inner core of the absorbent article.
  • the present invention is directed to a fibrous nonwoven web having a chemically imposed hydrophilic surface.
  • “Chemically imposed” means that the hydrophilic surface is formed by chemical reaction and linkage between a hydrophilic moiety and an initially hydrophobic nonwoven fabric- forming material.
  • the chemical reaction and linkage of the hydrophilic moiety is distinguishable from prior art methods in which a nonwoven fabric is rendered hydrophilic by surface coating of a hydrophilic compound, or by merely blending (and not reacting) a hydrophilic compound with a nonwoven fabric-forming polymer.
  • the chemical reaction and linkage of the hydrophilic moiety to the nonwoven fabric material causes hydrophilic properties which are more permanent, and less transitory, than would occur without the chemical reaction.
  • the starting material for the invention is a hydrophopic fibrous nonwoven web, or a hydrophobic nonwoven web-forming polymer material.
  • the nonwoven web, or the web-forming material is chemically reacted with an anhydride and/or its carboxylic acid derivative to form an intermediate hydrophopic material having a polar functionality.
  • the intermediate material is then further reacted with a hydrophilic compound having a reactive moiety, such as a hydroxyl or amino group, that forms a chemical linkage with the polar functionality.
  • the resulting product is either a hydrophilic fibrous nonwoven web, or a hydrophilic polymer material that can be spun into a fibrous nonwoven web.
  • the web or web-forming material possesses all the desirable properties of the underlying polymeric base material, except for the hydrophilic addition.
  • the chemically imposed hydrophilicity is durable, meaning that it cannot be washed off or otherwise physically removed.
  • Fig. 1 is a plot showing the effect of different reaction-inducing levels of an anhydride and a polyglycol on the water contact angle of a polyolefin. Lower water contact angles, measured by ASTM D-5946-96, indicate a more hydrophilic material. In Fig. 1 , the polyglycol level is varied at three fixed levels of maleic anhydride.
  • Fig. 2 is another plot showing the effect of different reaction-inducing levels of an anhydride and a polyglycol on the water contact angle of a polyolefin.
  • the maleic anhydride level is varied for three fixed levels of polyglycol.
  • Fig. 3 is a plot showing the effect of different reaction-inducing levels of a polyglycol having three different weight average molecular weights, at a constant level of maleic anhydride, on the water contact angle of a polyolefin.
  • Fig. 4 is a plot showing the effect of different reaction-inducing levels of a polyglycol, on the water contact angle of two polypropylene materials reacted with different levels of maleic anhydride.
  • Fig. 5 is a bar graph showing the water contact angles of polyolefms reacted using three different levels of a polyglycol, and three different levels of maleic anhydride, before and after washing with distilled water.
  • Fig. 6 is a plot showing the reaction reproducibility as reflected in water contact angles for a maleated polyolefin further reacted with different levels of a polyglycol.
  • Fig. 7 and 8 are plots showing the water contact angles achieved after reaction of different levels of two polyglycol materials with the same maleated polypropylene.
  • Nonwoven web means a web having a structure of individual fibers or threads which are interlaid, but not in an identifiable, repeating manner. Nonwoven webs have been, in the past, formed by a variety of processes such as, for example, melt-blowing processes, spunbonding processes and bonded carded web processes.
  • Meltblown fibers means fibers formed by extruding a molten thermoplastic material through a plurality of fine, usually circular, die capillaries as molten threads or filaments into a high velocity gas (e.g., air) stream which attenuates the filaments of molten thermoplastic material to reduce their diameter, possibly to microfiber diameter. Thereafter, the meltblown fibers are carried by the high velocity gas stream and are deposited on a collecting surface to form a web of randomly disbursed meltblown fibers.
  • a high velocity gas e.g., air
  • Microfibers means small diameters fibers having an average diameter not greater than about 100 microns, for example, having an average diameter of from about 0.5 microns to about 50 microns, or more particularly, an average diameter of from about 4 microns to about 40 microns.
  • spunbond fibers refers to small diameter fibers which are formed by extruding a molten thermoplastic material as filaments from a plurality of fine, usually circular, capillaries of a spinnerette with the diameter of the extruded filaments then being rapidly reduced as by, for example, eductive drawing or other well-known spunbonding mechanisms.
  • the production of spunbonded nonwoven webs is illustrated in patents such as, for example, in U.S. Patent 3,802,817 to Matsuki et al. and U.S. Patent 5,382,400 to Pike et al. The disclosures of these patents are hereby inco ⁇ orated by reference.
  • Polymer generally includes, but is not limited to, homopolymers, copolymers, such as, for example, block, graft, random and alternating copolymers, te ⁇ olymers, etc. and blends and modifications thereof. Furthermore, the term “polymer” shall include all possible geometrical configurations of the material. These configurations include, but are not limited to, isotactic, syndiotactic and random symmetries.
  • Bicomponent fibers refers to fibers which have been formed from at least two polymers extruded from separate extruders but spun together to form one fiber.
  • the polymers are arranged in substantially constantly positioned distinct zones across the cross- section of the bicomponent fibers and extend continuously along the length of the bicomponent fibers.
  • the configuration of such a bicomponent fiber may be, for example, a sheath/core arrangement wherein one polymer is surrounded by another or may be a side- by-side arrangement or an "islands-in-the-sea" arrangement.
  • Bicomponent fibers are taught in U.S. Patent 5,108,820 to Kaneko et al., U.S. Patent 5,336,552 to Strack et al, and European Patent 0586924.
  • the polymers may be present in ratios of 75/25, 50/50, 25/75 or any other desired ratios.
  • Biconstituent fibers refers to fibers which have been formed from at least two polymers extruded from the same extruder as a blend.
  • blend is defined below.
  • Biconstituent fibers do not have the various polymer components arranged in relatively constantly positioned distinct zones across the cross-sectional area of the fiber. The various polymers are usually not continuous along the entire length of the fiber, but are instead in the form of fibrils which start and end at random. Biconstituent fibers are sometimes also referred to as multiconstituent fibers. Fibers of this general type are discussed in, for example, U.S. Patent 5,108,827 to Gessner.
  • “Blend” means a mixture of two or more polymers while the term “alloy” means a sub-class of blends wherein the components are immiscible but have been compatibilized.
  • “Miscibility” and “immiscibility” are defined as blends having negative and positive values, respectively, for the free energy of mixing.
  • “compatibilization” is defined as the process of modifying the interfacial properties of an immiscible polymer blend in order to make an alloy.
  • Hydrophilic refers to a surface or material that has an affinity for water, and is wettable by water. Some hydrophilic materials are capable of absorbing water, dissolving in water, and/or swelling. A hydrophilic material should have a water contact angle of about 80 degrees or less, measured by ASTM D5946-96.
  • Hydrophobic refers to a surface or material that is poorly wetted by water, has little or no affinity for water, and tends to repel water.
  • a hydrophobic material may have a water contact angle of at least 80 degrees, sometimes 90 degrees or more.
  • “Chemically imposed hydrophilic surface” refers to a hydrophilic surface formed by chemical reaction between a hydrophilic moiety and an initially hydrophobic nonwoven web or web-forming polymer. Chemically imposed hydrophilic surfaces are generally durable, meaning that the surfaces remain hydrophilic after washing with distilled water.
  • Consisting essentially of does not exclude the presence of additional materials which do not significantly affect the desired characteristics of a given composition or product.
  • additional materials include, without limitations, pigments, antioxidants, stabilizers, surfactants, waxes, flow promoters, particulates and materials added to enhance processability of the composition.
  • the starting material for the invention is a fibrous nonwoven web or web- forming material which is hydrophobic.
  • the starting material includes a hydrophobic polymer.
  • Exemplary hydrophobic polymers include without limitation, polypropylene, polyethylene (high and low density), ethylene copolymers with C 3 -C 20 -olefins, propylene copolymers with ethylene or C 4 -C 20 ⁇ -olefms, butene copolymers with ethylene, propylene, or C 5 -C 20 ⁇ -olefms, polyvinyl chloride, polyesters, polyfluorocarbons, hydrophobic polyurethane, polystyrene, acrylic resins, and combinations thereof.
  • Polyolefms are preferred, including polyethylenes, polypropylenes, copolymers thereof, and blends thereof.
  • the nonwoven web may be any type of thermoplastic nonwoven web.
  • the web may be a spunbonded web, a meltblown web, a bonded carded web, or a combination including any of the foregoing.
  • the nonwoven web may also be a bicomponent or biconstituent web, as well as a web containing one or more of the above-listed thermoplastic polymers.
  • a bicomponent web for instance, it is important only that the surface material include a hydrophobic polymer which can be modified in accordance with the present invention to render it hydrophilic.
  • the composition of a second (inner) material, not exposed at the fiber surfaces, is immaterial for pu ⁇ oses of the invention and may be hydrophilic or hydrophobic.
  • the nonwoven web may have a basis weight of about 0.1-150 grams per square meter (gsm), preferably about 1-100 gsm, more preferably about 5-50 gsm.
  • the fibrous nonwoven web or web-forming material is chemically reacted with a polar material.
  • the polar material can include an anhydride or anhydride derivative (e.g., a carboxylic acid derivative) and can be a monomer, polymer, or compound.
  • the reaction product is a hydrophobic polymer material having a polar functionality (herein called a polar-modified polymer).
  • the nonwoven web is reacted with maleic anhydride or one of its derivatives, such as maleic acid or fumaric acid.
  • suitable polar materials include without limitation various anhydrides and their derivatives, particularly those having an unsaturated carbon-carbon double bond:
  • HOOCCH CHCOOH
  • the polar material is reacted with the hydrophobic polymer, either using heat or a catalyst (e.g., a peroxide catalyst), or a combination of heat and catalyst.
  • a catalyst e.g., a peroxide catalyst
  • the reaction may take place at a temperature near or above the melting point of the hydrophobic polymer.
  • the hydrophobic polymer and polar material may be blended together in a mixer, with the hydrophobic polymer in the molten state, to facilitate substantially homogeneous mixing and reaction between the polar material and hydrophobic polymer.
  • the reaction may occur in a mixer at a temperature of about 160-225 °C, preferably 175-200 °C, with or without a peroxide catalyst, whereby the polar material is graft polymerized onto the hydrophobic polymer.
  • the chemical reaction may occur at a much lower temperature in a solvent, with the grafting reaction being aided by a peroxide catalyst.
  • a polar material such as maleic anhydride or a dicarboxylic acid derivative
  • a hydrophobic polymer e.g., a polyolefin
  • a suitable polar-modified hydrophobic polymer may be purchased commercially.
  • Commercially available polar- modified hydrophobic polymers include without limitation the following: EXXELOR ® 1015, a maleated polypropylene available from Exxon Chemical Co., having a melt flow rate (230°C) of 120 grams/ 10 minutes and containing 0.4% by weight grafted maleic anhydride;
  • POLYBOND ® 3150 a maleated polypropylene available from Uniroyal Chemical Co., having a melt flow rate (230°C) of 50 grams/10 minutes and containing 0.7% by weight grafted maleic anhydride;
  • POLYBOND ® 3200 a maleated polypropylene available from Uniroyal Chemical Co., having a melt flow rate (230°C) of 110 grams/10 minutes and containing 1.0% by weight grafted maleic anhydride.
  • the maleated polyolefin may itself be hydrophobic and not wettable to water, or borderline between hydrophobic and hydrophilic.
  • the reaction with the polar material does not render the polymer backbone hydrophilic; rather, it provides a chemical linkage for the subsequent reaction with a hydrophilic material.
  • the polar-modified polymer should contain about 0.1-3.0% by weight of the polar monomer, preferably about 0.4-1.0% by weight, more preferably about 0.6-0.8% by weight.
  • the polar material is grafted onto the hydrophobic polyolefin, resulting in a stereochemistry most favorable for further reaction.
  • Maleated polypropylene for instance, has the following stereochemistry in which the functional anhydride group projects outward from the backbone chain:
  • the polar-modified hydrophobic polymer is reacted with a hydrophilic material, thereby increasing the hydrophilicity of the polymer to render it wettable to water.
  • the hydrophilic material can be a hydrophilic monomer, polymer, compound, or blend containing one or more of these. Suitable hydrophilic materials include organic alcohols, dialcohols, tertiary alcohols, polymers containing them, and other hydrophilic materials having groups which react with the polar group (e.g., the anhydride moiety) on a polar-modified hydrophobic polymer.
  • hydrophilic materials include polyglycols and polyoxides, including polyolefin glycols and oxides, such as polyethylene glycol, polyethylene oxide, polypropylene glycol, polypropylene oxide, and copolymers and mixtures thereof.
  • polyglycols include those having monoamine and/or diamine linkages which further promote hydrophilicity.
  • the JEFF AMINE ® series of polyglycols available from Huntsman Chemical Co., includes monoamines and diamines of varying molecular weights.
  • a typical JEFFAMINE ® monoamine structure is as follows:
  • Maleated polyolefins can be reacted with polyglycols in the presence of heat to form imides having increased hydrophilic properties:
  • the reaction between a polar-modified hydrophobic polymer and a hydrophilic material can be accomplished by melt blending the ingredients together, with or without a peroxide catalyst to form a hydrophilic polymer reaction product.
  • the reaction mixture should contain about 1-35% by weight of the hydrophilic material, preferably about 4-25% by weight, more preferably about 8-20% by weight.
  • the reaction preferably occurs with the polar-modified polymer in the molten state, in order to facilitate a substantially homogeneous dispersion.
  • maleated polypropylene is the polar-modified hydrophobic polymer
  • the reaction may occur at about 160-225 °C, preferably about 175-200°C.
  • the hydrophilic polymer reaction product is a polymer having increased hydrophilicity compared to both the hydrophobic polymer and the polar-modified hydrophobic polymer (which have advancing water contact angles greater than about 80 and sometimes about 90 or greater).
  • the hydrophilic polymer reaction product has an advancing water contact angle less than about 80, preferably less than about 70, more preferably less than about 60, and in some instances less than about 50.
  • Lower water contact angles for a material indicate greater hydrophilicity, and a greater tendency for water to wet the material.
  • Suitable JEFFAMINE ® polyglycols available from Huntsman Chemical Co., include those sold under the names M-600, M-1000, M-2005, ED- 900 and ED-2003. These polyglycols differ in molecular weight and the number of amine groups per molecule.
  • the JEFFAMINE ® "M” series polyglycols are monoamines, while the “ED” series polyglycols are diamines. The numbers following the "M” and "ED” notations indicate weight average molecular weight.
  • the hydrophilic polymer reaction product can be converted into a fibrous nonwoven web using a conventional melt spinning process.
  • the resulting nonwoven web is of a durable hydrophilic character, meaning that the hydrophilicity cannot be washed away or otherwise easily removed. It is presently preferred to form the hydrophilic polymer reaction product, using the techniques described above, before forming the polymer into a nonwoven web. However, it is also contemplated that a nonwoven web may be formed before carrying out one or both reaction steps.
  • a nonwoven web may be formed from a polar-modified hydrophobic polymer, such as maleated polypropylene, after which the web can be surface- reacted with a hydrophilic material using a peroxide catalyst and a solution application.
  • a nonwoven web may initially be formed of a hydrophobic polymer, after which the web is surface-grafted with a polar monomer using catalyst and a solution application, and then further reacted with a hydrophilic material.
  • Other techniques for forming a hydrophilic nonwoven web by reacting a hydrophobic polymer, a polar material, and a hydrophilic material are also considered to be within the scope of the invention.
  • a polar-modified polymer such as maleated polypropylene or polyethylene can be blended with a hydrophilic material such as polyethylene glycol or amine-terminated polyethylene oxide.
  • the blend can then be spun into a nonwoven web, with the spinning conditions being controlled to assure a sufficient level of reaction between the hydrophilic material and the polar modified hydrophobic polymer, especially at the fiber surfaces.
  • the hydrophilic polymer reaction product can be blended with a quantity of unmodified hydrophobic polymer (for example, an unmodified polyolefin such as polypropylene or polyethylene) to produce a blend having improved (blended) hydrophilic properties.
  • a quantity of unmodified hydrophobic polymer for example, an unmodified polyolefin such as polypropylene or polyethylene
  • the blend can then be spun into a nonwoven web.
  • the blend composition may contain anywhere from about 2-100% of the hydrophilic polymer reaction product, depending on the level of hydrophilicity needed.
  • maleated polyolefms were chemically reacted with polyolefin glycol materials using a Haake Rheocord 9000 batch mixer as the reaction chamber.
  • the mixer was outfitted with twin blades and electric heating.
  • a mixture of the maleated polyolefin and polyolefin glycol totaling 50 grams was placed in the batch mixer.
  • the maleated polyolefin was added to the mixer in the form of pellets. If the polyglycols were in liquid form, a syringe was used to add them. If the polyglycols were solid, they were added along with the maleated polyolefin.
  • the batch mixer was set at 190°C, and the reaction was allowed to proceed for 10 minutes to form a hydrophilic polymer reaction product. After 10 minutes, samples of reaction product were collected from the batch mixer for analysis.
  • films were pressed. Two separate films were pressed from each sample. Mylar sheets were used to prevent the resin blend from sticking to the film press.
  • the film press was set at 190°C and 10000 psi for 1 minute. Then, water contact angle measurements of those films were performed with a NRL Contact Angle Goniometer, Model 100-00, available from Rame-Hart, Inc.
  • the NRL Contact Angle Goniometer is a small, optical-bench type device inco ⁇ orating an internal protractor-readout calibrated in 1 -degree increments. Its low-power microscope produces a sha ⁇ ly-defined image of the water drop specimen, which is observed as a silhouette.
  • a specimen supporting stage permits the specimen to be easily aligned with the two independently-rotatable crosshairs within the microscope and is calibrated on both horizontal and vertical axes in 0.02mm divisions.
  • the variable intensity illuminator can be adjusted to allow for optimal illumination to be achieved. For these examples, a video camera was used to capture the image for display on a 14-inch monitor, allowing easy reading.
  • EXXELOR ® 1015 described previously, polypropylene with 0.4% by weight maleic anhydride.
  • POLYBOND ® 3150 described previously, polypropylene with 0.7% by weight maleic anhydride.
  • POLYBOND ® 3200 described previously, polypropylene with 1.0% by weight maleic anhydride.
  • POLYBOND ® 3009 a maleated polyethylene available from Uniroyal, having a melt flow rate (190°C) of 5 grams/10 min. and containing 1.0% by weight grafted maleic anhydride.
  • POLYBOND ® 3002 a maleated polypropylene available from Uniroyal, having a melt flow rate (230°C) of 7 grams/10 min. and containing 0.2% by weight grafted maleic anhydride.
  • DOW S-1775 a maleated polyethylene available from Dow Chemical Co. containing 1.2% by weight maleic anhydride.
  • MP 660 a maleated polypropylene available from Aristech Chemical Co. containing 0.4% by weight maleic anhydride.
  • JEFFAMINE ® M-600 described previously, a monoamine polyglycol having a molecular weight of 600.
  • JEFFAMINE ® M-1000 described previously, a monoamine polyglycol having a molecular weight of 1000.
  • JEFFAMINE ® M-2005 described previously, a monoamine polyglycol having a molecular weight of 2005.
  • JEFFAMINE ® ED-900 described previously, a diamine polyglycol having a molecular weight of 900.
  • JEFFAMINE ® ED-2003 described previously, a diamine polyglycol having a molecular weight of 2003.
  • Polyethylene glycol having a molecular weight of 2000, available from Aldrich Chemical Co.
  • Polyethylene glycol having a molecular weight of 900, available from Aldrich Chemical Co.
  • EXXON 3445 a polypropylene homopolymer (not maleated or otherwise modified), used in some of the control Examples.
  • PEG 400 MO a distearate internal surfactant available from PPG Industries, used in some of the control Examples.
  • Titanium propoxide an esterification catalyst available from Aldrich Chemical Co. which can be used to aid the reaction between a polar functional polyolefin and a hydrophilic modifier.
  • Figs. 1-8 illustrate the effects of different maleic anhydride levels in polypropylene and different polyglycol levels for a JEFFAMINE ® polyglycol, M-2005, after washing.
  • a JEFFAMINE ® polyglycol M-2005
  • higher levels of polyglycol (20% and 24% by weight) resulted in lower contact angles.
  • the polypropylene with 0.7% by weight maleic anhydride resulted in better hydrophilicity (lower contact angles) than the polypropylenes with 0.4% and 1.0% by weight maleic anhydride.
  • Fig. 3 illustrates the effects of using polyglycols of different molecular weight and different percentage levels, for maleated polypropylene containing 0.4% by weight maleic anhydride.
  • the contact angles were lowered (indicating better hydrophilicity) as 1) the molecular weight of polyglycol was raised, and 2) the amount of polyglycol was increased.
  • Fig. 4 illustrates the effects of using the lowest molecular weight polyglycol (M-600) in different amounts, with two levels of anhydride-grafted polypropylene (0.4% and 1.0% by weight). Better contact angles were achieved with the higher level of anhydride modification. Yet there was little change in contact angles as the polyglycol levels were varied between 4% and 16% by weight.
  • Fig. 5 illustrates the effect of washing on samples made using all three of the JEFFAMINE "M"-series polyglycols, at three levels of polyglycol, and polypropylene grafted with 0.7% by weight maleic anhydride.
  • the washing caused the contact angles to increase, but not enough to render the samples hydrophobic.
  • the washing may have removed unreacted monomer and impurities, but did not remove the chemically imposed hydrophilicity resulting from the chemical reaction between the maleated polypropylene and the hydrophilic materials.
  • Fig. 6 illustrates that contact angles on reaction products from different trials are quite reproducible for different samples prepared the same way, using the same ingredients.
  • Fig. 7 illustrates the effect of reacting different levels of monoamine polyglycol, with molecular weight of 2005, with maleated polypropylene containing 0.7% by weight maleic anhydride.
  • the contact angles decreased as the polyglycol level was raised.
  • Fig. 8 illustrates that the contact angle is roughly independent of polyglycol level when a diamine polyglycol having a molecular weight of 900 is used.
  • a maleated polyethylene, manufactured by Dow Chemical Co. under the name S-1775, pu ⁇ ortedly having a 1.2 wt% maleic anhydride content was mixed with 5 wt% of poly(ethylene glycol), molecular weight 2,000, in the above mentioned mixer at 190 degrees C for 10 min.
  • the contact angle of the pressed films from this compound was measured as 48 degrees before washing, and 59 degrees after washing the film with ample water and drying.
  • the original S-1775 resin had a contact angle of 84 degrees.
  • a maleated polypropylene, manufactured by Exxon Chemical Co. under the name of Exxelor 1015, having a claimed 0.4 wt% of maleic anhydride content was mixed with 4 wt% of poly(ethylene glycol), molecular weight 2,000, in the above mentioned mixer at 200 degrees C for 10 min.
  • the contact angle of the pressed films from this compound was measured as 51 degrees before washing, and 69 degrees after washing the film with ample water and drying.
  • a maleated polypropylene, manufactured by Aristech Chemical Co. under the name of MP660, having a claimed 0.4 wt% of maleic anhydride content was mixed with 4 wt% of poly(ethylene glycol), molecular weight 900, together with 0.2 wt.% of esterification catalyst titanium propoxide obtained from Aldrich Chemical Co., in the above mentioned mixer at 200 degrees C for 10 min.
  • the contact angle of the pressed films from this compound was measured as 38 degrees before washing, and 56 degrees after washing the film with ample water and drying.

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Abstract

L'invention porte sur une bande non tissée possédant des propriétés hydrophiles durables et préparée à partir d'un polymère initialement hydrophobe ayant réagi chimiquement avec un matériau polaire de façon à obtenir un polymère modifié, et ayant également réagi chimiquement avec un matériau hydrophile de façon à conférer des propriétés hydrophiles. Le produit de réaction du polymère hydrophile ainsi préparé peut être formé dans une bande non tissée à l'aide de techniques traditionnelles de filage par fusion. Selon une autre variante, une bande non tissée peut être formée à partir du polymère hydrophobe ou de son intermédiaire modifié par le matériau polaire, la ou les autres réactions s'effectuant par greffage en surface.
PCT/US1999/018030 1998-08-31 1999-08-09 Tissu polyolefinique non tisse aux proprietes hydrophiles WO2000012801A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU53449/99A AU5344999A (en) 1998-08-31 1999-08-09 Nonwoven polyolefin fabrics having hydrophilicity

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US14450198A 1998-08-31 1998-08-31
US09/144,501 1998-08-31

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001076524A1 (fr) * 2000-04-07 2001-10-18 The Procter & Gamble Company Bandes texturees microajourees et articles absorbants mettant ces bandes en application
US6972148B2 (en) 2003-06-23 2005-12-06 Kimberly-Clark Worldwide, Inc. Glove having improved donning characteristics
EP2133397A1 (fr) * 2007-03-30 2009-12-16 Kuraray Co., Ltd. Composition de résine adhésive, et stratifié utilisant celle-ci
WO2017132119A1 (fr) 2016-01-26 2017-08-03 The Procter & Gamble Company Noyaux absorbants comprenant un immobilisateur superabsorbant de masse moléculaire élevée
CN109071723A (zh) * 2016-04-22 2018-12-21 巴塞尔聚烯烃意大利有限公司 用于三维打印机的基于丙烯的长丝
WO2019036588A1 (fr) * 2017-08-18 2019-02-21 Becton, Dickinson And Company Copolymères greffés amphiphiles
EP3446792A1 (fr) 2017-08-22 2019-02-27 The Procter & Gamble Company Procédé et appareil d'application d'immobilisateur superabsorbant
EP3424475A4 (fr) * 2016-03-04 2019-11-13 Mitsui Chemicals, Inc. Corps absorbant et article d'hygiène
US10575916B2 (en) 2014-02-28 2020-03-03 O&M Halyard, Inc. Surfactant treatment for a sterilization wrap with reduced occurrence of wet packs after steam sterilization
CN111793896A (zh) * 2019-04-09 2020-10-20 江苏金美达新材料有限公司 一种擦拭材料及其制作方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114379A2 (fr) * 1982-12-22 1984-08-01 Montedison S.p.A. Fibres textiles à base de polymères oléfiniques modifiés et procédé pour leur fabrication
EP0634424A1 (fr) * 1993-07-13 1995-01-18 Huntsman Corporation Polypropylène modifiée avec polyétheraminés

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114379A2 (fr) * 1982-12-22 1984-08-01 Montedison S.p.A. Fibres textiles à base de polymères oléfiniques modifiés et procédé pour leur fabrication
EP0634424A1 (fr) * 1993-07-13 1995-01-18 Huntsman Corporation Polypropylène modifiée avec polyétheraminés
US5721315A (en) * 1993-07-13 1998-02-24 Huntsman Petrochemical Corporation Polyether amine modification of polypropylene

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001076524A1 (fr) * 2000-04-07 2001-10-18 The Procter & Gamble Company Bandes texturees microajourees et articles absorbants mettant ces bandes en application
US6972148B2 (en) 2003-06-23 2005-12-06 Kimberly-Clark Worldwide, Inc. Glove having improved donning characteristics
EP2133397A1 (fr) * 2007-03-30 2009-12-16 Kuraray Co., Ltd. Composition de résine adhésive, et stratifié utilisant celle-ci
EP2133397A4 (fr) * 2007-03-30 2010-08-04 Kuraray Co Composition de résine adhésive, et stratifié utilisant celle-ci
CN101679827B (zh) * 2007-03-30 2013-01-02 可乐丽股份有限公司 粘结性树脂组合物及使用该组合物的层压材料
US9074088B2 (en) 2007-03-30 2015-07-07 Kuraray Co., Ltd. Adhesive resin composition, and laminate using the same
US10575916B2 (en) 2014-02-28 2020-03-03 O&M Halyard, Inc. Surfactant treatment for a sterilization wrap with reduced occurrence of wet packs after steam sterilization
WO2017132119A1 (fr) 2016-01-26 2017-08-03 The Procter & Gamble Company Noyaux absorbants comprenant un immobilisateur superabsorbant de masse moléculaire élevée
EP3424475A4 (fr) * 2016-03-04 2019-11-13 Mitsui Chemicals, Inc. Corps absorbant et article d'hygiène
CN109071723A (zh) * 2016-04-22 2018-12-21 巴塞尔聚烯烃意大利有限公司 用于三维打印机的基于丙烯的长丝
CN109071723B (zh) * 2016-04-22 2020-12-29 巴塞尔聚烯烃意大利有限公司 用于三维打印机的基于丙烯的长丝
WO2019036588A1 (fr) * 2017-08-18 2019-02-21 Becton, Dickinson And Company Copolymères greffés amphiphiles
CN110997758A (zh) * 2017-08-18 2020-04-10 贝克顿·迪金森公司 两性接枝共聚物
US10654979B2 (en) 2017-08-18 2020-05-19 Becton, Dickinson And Company Amphiphilic graft copolymers
CN110997758B (zh) * 2017-08-18 2022-03-29 贝克顿·迪金森公司 两性接枝共聚物
EP3446792A1 (fr) 2017-08-22 2019-02-27 The Procter & Gamble Company Procédé et appareil d'application d'immobilisateur superabsorbant
WO2019040242A1 (fr) 2017-08-22 2019-02-28 The Procter & Gamble Company Méthode et appareil pour l'application d'immobilisateur superabsorbant
CN111793896A (zh) * 2019-04-09 2020-10-20 江苏金美达新材料有限公司 一种擦拭材料及其制作方法

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