WO2012147694A1 - 繊維、不織布及びその用途 - Google Patents
繊維、不織布及びその用途 Download PDFInfo
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- WO2012147694A1 WO2012147694A1 PCT/JP2012/060867 JP2012060867W WO2012147694A1 WO 2012147694 A1 WO2012147694 A1 WO 2012147694A1 JP 2012060867 W JP2012060867 W JP 2012060867W WO 2012147694 A1 WO2012147694 A1 WO 2012147694A1
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- Prior art keywords
- fiber
- nonwoven fabric
- anionic surfactant
- acid form
- weight
- Prior art date
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Classifications
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- 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
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
-
- 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
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
-
- 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
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
- A61F13/51113—Topsheet, i.e. the permeable cover or layer facing the skin comprising an additive, e.g. lotion or odour control
-
- 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
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
- A61F13/51121—Topsheet, i.e. the permeable cover or layer facing the skin characterised by the material
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- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- 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
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
-
- 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
-
- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
-
- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2509/00—Medical; Hygiene
- D10B2509/02—Bandages, dressings or absorbent pads
- D10B2509/026—Absorbent pads; Tampons; Laundry; Towels
-
- 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
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
Definitions
- the present invention relates to a fiber suitable for sanitary materials such as disposable diapers and sanitary products, in which the growth of harmful bacteria is suppressed and skin irritation is reduced, and a non-woven fabric containing such a fiber.
- Nonwoven fabrics obtained from olefin polymers typified by polypropylene are widely used in various applications including sanitary materials because of their excellent breathability, flexibility and lightness. For this reason, the nonwoven fabric is required to have various properties according to its use and to improve the properties.
- Patent Document 1 discloses a method of impregnating a nonwoven fabric with a pH control material made of citric acid or sodium citrate to maintain a pH environment comparable to the pH of the contacting skin.
- citric acid described in Patent Document 1 is water-soluble, once it comes into contact with urine, a pH control material such as citric acid flows out and moves toward the absorber. It is difficult.
- JP 2004-176225 A discloses a fiber treatment agent comprising a betaine amphoteric compound, an alkylene oxide addition type nonionic surfactant and / or an anionic surfactant such as a carboxylate.
- Patent Document 3 discloses a method using an antibacterial composition containing an antibacterial active substance and an anionic surfactant (Japanese Patent Publication No. 2002-505918 (Patent Document 4)).
- Patent Document 4 discloses a method using an antibacterial composition containing an antibacterial active substance and an anionic surfactant.
- Various methods such as a method using a skin care composition containing a proton-donating active ingredient have been proposed.
- any method has a problem that the effect is reduced with time.
- the growth of bacteria can be temporarily reduced by the action of an antibacterial agent, but the growth of beneficial bacteria together with harmful bacteria is also suppressed. It will be. Therefore, in the prior art, the effect of suppressing skin irritation that occurs when a diaper is worn is insufficient, and further improvement is required.
- the present inventors include a fiber suitable for a top sheet of a sanitary material such as a disposable diaper, a sanitary product, or a second sheet in which the growth of harmful bacteria is suppressed and the suppression of skin irritation can be sustained.
- a fiber obtained from an olefin polymer composition containing an anionic surfactant in an acid form and a nonwoven fabric containing such a fiber can achieve the object. It was.
- the present invention provides a fiber comprising an olefin polymer composition containing 0.1 to 30 parts by weight of an anionic surfactant in an acid form with respect to 100 parts by weight of an olefin polymer, the anion in the acid form
- the system surfactant provides a fiber obtained by melt-kneading the fiber.
- the fiber according to the present invention and the nonwoven fabric containing the fiber have characteristics that, when used as a sanitary material such as a diaper, the growth of harmful bacteria is suppressed and the effect of suppressing skin irritation is high.
- the olefin polymer forming the fiber of the present invention and the nonwoven fabric containing the fiber is an ⁇ -olefin such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene and 1-octene alone or Specific examples of such copolymers include high pressure method low density polyethylene, linear low density polyethylene (so-called LLDPE), high density polyethylene, ethylene / propylene random copolymer, ethylene / 1-butene random copolymer, etc.
- Ethylene polymers such as ethylene homopolymers or ethylene / ⁇ -olefin copolymers; propylene homopolymers (so-called polypropylene), propylene / ethylene random copolymers, propylene / ethylene / 1-butene random copolymers (So-called random polypropylene), propylene block copolymer, propylene Propylene polymers such as 1-butene random copolymer; 1-butene polymers such as 1-butene homopolymer, 1-butene / ethylene copolymer, 1-butene / propylene copolymer; And methyl-1-pentene.
- a propylene polymer is preferable because a nonwoven fabric excellent in spinning stability at molding, workability and breathability of the nonwoven fabric, flexibility, light weight, and heat resistance can be obtained.
- an auxiliary agent that promotes or suppresses hydrophilicity within a range that does not impair the object of the present invention a commonly used antioxidant, weathering stabilizer, light stabilizer, antiblocking agent, Additives such as a lubricant, a nucleating agent, a pigment, a softening agent, a water repellent, a filler, an antibacterial agent, or a polymer other than an olefin polymer can be blended as necessary.
- the propylene polymer according to the present invention is usually a homopolymer of propylene having a melting point (Tm) of 125 ° C. or higher, preferably 130 to 165 ° C., or a small amount of ethylene, 1-butene, 1- One or two of 2 or more carbon atoms (excluding 3 carbon atoms), preferably 2 to 8 (excluding 3 carbon atoms), such as pentene, 1-hexene, 1-octene, 4-methyl-1-pentene Copolymers with more than one ⁇ -olefin are preferred.
- Tm melting point
- the melt flow rate (MFR: ASTM D-1238, 230 ° C., load 2160 g) is not particularly limited, but usually 1 to 1000 g / 10 minutes, preferably It is in the range of 5 to 500 g / 10 minutes, more preferably 10 to 100 g / 10 minutes.
- the content of ⁇ -olefin in the propylene / ⁇ -olefin random copolymer is not particularly limited as long as the melting point (Tm) is in the above range, but is usually in the range of 1 to 10 mol%. More preferably, it is 1 to 5 mol%.
- the anionic surfactant in the acid form according to the present invention is an anionic surfactant that can exhibit acidity in the presence of water or moisture.
- an acid form anionic surfactant exhibiting weak acidity is preferable because it can express the ability to alleviate the change in pH by having a buffering ability.
- Fatty acid or acid form phosphate ester type surfactants are preferred.
- it may be a partially neutralized salt like a monoalkyl phosphate ester salt which is not a completely neutralized salt.
- the anionic surfactant in the acid form according to the present invention is preferably 9 from the viewpoint of usually having a hydrophobic group having 8 or more carbon atoms, better melt-kneading properties, and stable operability during extrusion molding. More preferably, an anionic surfactant having an aliphatic hydrocarbon group having 12 or more, more preferably 13 or more, particularly preferably an anionic interface having an aliphatic hydrocarbon group having 18 to 28 carbon atoms.
- the phosphoric acid ester type surfactant having 9 or more carbon atoms in the hydrophobic group, more preferably 12 or more carbon atoms in the hydrophobic group, more preferably 13 or more, particularly preferably.
- Properly is a phosphate ester type surfactant in the range of 18-28.
- Phosphate-type surfactants include alkyl phosphate esters that are esters of aliphatic alcohols and phosphoric acid, alkyl ether phosphate esters that are esters of aliphatic alcohol alkylene oxide adducts and phosphoric acid, aromatics Examples thereof include alkylphenyl ether phosphates which are esters of an alkylene oxide adduct of alcohol and phosphoric acid.
- the acid form anionic surfactant according to the present invention may be a mixture thereof.
- a fatty acid having 18 to 28 carbon atoms, or a phosphoric acid ester type surfactant in an acid form is an alkyl phosphate ester or carbon that is an ester of an aliphatic alcohol having 18 to 28 carbon atoms and phosphoric acid.
- Alkyl ether phosphate ester which is an ester of an alkylene oxide adduct of an aliphatic alcohol having 18 to 28 and phosphoric acid, or an ester of an alkylene oxide adduct of an aromatic alcohol having 18 to 28 carbon atoms and phosphoric acid
- alkyl phenyl ether phosphate ester or a mixture thereof.
- a phosphate ester type surfactant having 9 or more carbon atoms, or a mixture thereof a better melt kneadability can be obtained, and It is preferable because the anionic surfactant is suppressed from being eluted from the nonwoven fabric, and the durability of the effect can be obtained.
- fatty acids according to the present invention include saturated fatty acids such as myristic acid, palmitic acid, stearic acid, and montanic acid, and unsaturated fatty acids such as oleic acid, linolenic acid, and nervonic acid.
- alkyl phosphate esters for example, monostearyl phosphate ester, distearyl phosphate ester, monobehenyl phosphate ester, dibehenyl phosphate ester, Monocetyl phosphate ester, dicetyl phosphate ester, monolauryl phosphate ester, dilauryl phosphate ester, monooctyl phosphate ester, dioctyl phosphate ester and the like
- alkyl ether phosphate ester include, for example, mono (polyoxyethylene -Stearyl ether) phosphate ester, di (polyoxyethylene stearyl ether) phosphate ester, mono (polyoxyethylene lauryl ether) phosphate ester, di (polyoxyethylene lauryl ether)
- alkyl phenyl ether phosphate ester examples include mono (polyoxyethylene -Stearyl ether) phosphate ester, di (polyoxyethylene stearyl
- acid-form anionic surfactants include acid-form phosphate surfactants.
- Nonionic surfactant As the nonionic surfactant according to the present invention, various known nonionic surfactants can be used, and the surface of the fiber exhibits hydrophilicity when added to form a fiber. If it does not specifically limit.
- Specific examples of nonionic surfactants include fatty acid glycerides, alkoxylated alkylphenols, polyoxyalkylene fatty acid esters, alkyl polyoxyethylene alcohols, fatty acid amides, polyoxyalkylene sorbitan fatty acid esters, sucrose fatty acid esters, sorbitan fatty acid esters, fatty acids Examples include alkanolamides, polyoxyalkylene alkyl ethers, polyoxyalkylene alkyl phenyl ethers, alkyl polyglucosides, fatty acid diethanolamides, and alkyl monoglyceryl ethers.
- the olefin polymer composition according to the present invention comprises 0.1 to 30 parts by weight, preferably 1 to 15 parts by weight of the anionic surfactant in the acid form with respect to 100 parts by weight of the olefin polymer. More preferably, the composition contains 1.5 to 10 parts by weight.
- the amount of the anionic surfactant in the acid form is less than 0.1 parts by weight, the effect of making the environment around the fiber weakly acidic is low. As a result, the nonwoven fabric using the fiber is used as a sanitary material such as sanitary goods and diapers. When used, the rash reduction effect may be insufficient.
- the upper limit of the addition amount is not particularly limited, but if it exceeds 30 parts by weight, the effect of weakening the environment around the fiber is saturated, and the acid that exudes to the surface of the resulting fiber and the nonwoven fabric containing the fiber is saturated. The amount of the anionic surfactant in the form increases, and the molding processability decreases.
- the olefin polymer composition according to the present invention includes 0.1 to 30% of the nonionic surfactant with respect to 100 parts by weight of the olefin polymer in addition to the acid form anionic surfactant.
- the hydrophilicity of the resulting fiber can be improved, and a sudden change in pH due to the acid form anionic surfactant can be mitigated. .
- the olefin polymer used in the master batch of the mixture with the anionic surfactant in the acid form is not limited to the olefin polymer, and other olefin polymers may be used.
- MFR can be appropriately selected according to the target fiber and the nonwoven fabric containing the fiber.
- an antioxidant in the olefin polymer composition according to the present invention, an antioxidant, a weather stabilizer, a light stabilizer, an antiblocking agent, a lubricant, a nucleating agent, a pigment, and the like that are usually used within a range not impairing the object of the present invention.
- Polymers other than additives or olefin polymers can be blended as required.
- the fiber of the present invention and the nonwoven fabric containing the fiber include the fiber of the olefin polymer composition containing the olefin polymer and the anionic surfactant in the acid form, and preferably the nonionic surfactant, and the fiber. It is a nonwoven fabric containing.
- the acid form anionic surfactant when melt-kneaded with the olefin polymer, it is preferable because the effect of reducing skin irritation persists. Further, when the nonionic surfactant is used in combination, melt kneading is improved by melt kneading together with the acid form anionic surfactant, and the nonionic surfactant and the acid form of the acid form are improved.
- An anionic surfactant can be uniformly dispersed on the fiber surface.
- the fiber of the present invention usually has a fineness in the range of 0.5 to 5 denier.
- the fiber of the present invention may be a short fiber, it is preferable that the fiber is a long fiber because the fiber does not fall off from the resulting nonwoven fabric.
- the cross-sectional shape of the fiber of the present invention may be an irregular cross-section such as a V shape, a cross shape, or a T shape in addition to a round shape.
- the fiber of the present invention may be a crimped fiber made of an olefin polymer composition having at least two components of side-by-side type.
- examples of the olefin polymer include side-by-side crimped fibers made of a propylene homopolymer and a propylene / ethylene random copolymer.
- the fiber of the present invention may be a concentric or eccentric fiber, and in that case, the acid form anionic surfactant may be provided in both or either of the core part and the sheath part. And preferably, the nonionic surfactant may be added.
- the fiber of the present invention may be a mixed non-woven fabric with other fibers.
- the fibers of the present invention may be a mixed nonwoven fabric of such crimped fibers and other non-crimped fibers.
- the nonwoven fabric of the present invention usually has a basis weight of 10 to 30 g / m 2 , preferably 15 to 25 g / m 2 .
- the nonwoven fabric of the present invention is partially used by various known entanglement methods, for example, a method using means such as needle punching, water jet, and ultrasonic waves, or hot embossing using an embossing roll or hot air through. It may be entangled by a method of heat fusion. Such entanglement methods may be used alone or in combination with a plurality of entanglement methods.
- the embossed area ratio is usually in the range of 3 to 30%, preferably 5 to 20%.
- the stamped shape include a circle, an ellipse, an ellipse, a square, a rhombus, a rectangle, a square, a quilt, a lattice, a turtle shell, and a continuous shape based on these shapes.
- the nonwoven fabric of the present invention may be used alone or laminated with other layers depending on various uses.
- nonwoven fabric of the present invention examples include knitted fabrics, woven fabrics, nonwoven fabrics, films, and paper products.
- thermal embossing thermal fusion methods such as ultrasonic fusion
- mechanical entanglement methods such as needle punch and water jet
- hot melt adhesive Various known methods such as a method using an adhesive such as a urethane-based adhesive, extrusion lamination, and the like can be adopted.
- the nonwoven fabric of the present invention is highly convenient in terms of product quality control because the rash reduction effect continues even after a process of contacting with a high-temperature substance such as a hot melt adhesive or an extrusion laminate.
- nonwoven fabric laminated with the nonwoven fabric of the present invention examples include other known nonwoven fabrics such as other spunbond nonwoven fabrics, melt blown nonwoven fabrics, wet nonwoven fabrics, dry nonwoven fabrics, dry pulp nonwoven fabrics, flash spun nonwoven fabrics, and opened nonwoven fabrics.
- the material constituting the nonwoven fabric examples include various known thermoplastic resins, for example, ⁇ -olefins such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene and 1-octene.
- ⁇ -olefins such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene and 1-octene.
- High-pressure low-density polyethylene linear low-density polyethylene (so-called LLDPE), high-density polyethylene, polypropylene, polypropylene random copolymer, poly-1-butene, poly-4-methyl-1-pentene, ethylene / propylene random Polyolefins such as copolymers, ethylene / 1-butene random copolymers, propylene / 1-butene random copolymers, polyesters (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate
- the resulting laminate is excellent in flexibility, bulkiness and touch. Moreover, when the thing which extended
- the nonwoven fabric of the present invention is used for absorbent articles such as disposable diaper top sheets, second sheets, or sheets (core wraps) that wrap the absorbent body
- the fineness is 0.5 to 3 denier and the basis weight is 7 to 50 g / m 2. It is preferable to set it as the range.
- nonwoven fabric of the present invention when used for a sheet (core wrap) for wrapping an absorbent body of an absorbent article, it may be laminated with the melt blown nonwoven fabric.
- a breathable (moisture permeable) film is preferable so that the rash reduction effect which is a feature of the nonwoven fabric of the present invention is further utilized.
- a breathable film include various known breathable films, for example, films made of thermoplastic elastomers such as moisture-permeable polyurethane elastomers, polyester elastomers, polyamide elastomers, and thermoplastic resins containing inorganic or organic fine particles. Examples thereof include a porous film formed by stretching a film to be porous.
- thermoplastic resin used for the porous film is preferably a polyolefin such as high-pressure method low-density polyethylene, linear low-density polyethylene (so-called LLDPE), high-density polyethylene, polypropylene, polypropylene random copolymer, or a composition thereof.
- a polyolefin such as high-pressure method low-density polyethylene, linear low-density polyethylene (so-called LLDPE), high-density polyethylene, polypropylene, polypropylene random copolymer, or a composition thereof.
- the non-woven fabric of the present invention may be used after being subjected to secondary processing such as gear processing, printing, coating, laminating, heat treatment, and shaping, as long as the object of the present invention is not impaired.
- Nonwoven Fabric Manufacturing Method When short fibers are used as the raw material for the nonwoven fabric, they can be produced by various known production methods, for example, a wet method or a dry method (card).
- the long-fiber nonwoven fabric of the present invention can be produced by various known methods for producing nonwoven fabrics, but the method produced by the spunbond method is preferred in terms of excellent productivity.
- the long-fiber nonwoven fabric of the present invention is produced by the spunbond method, when producing a spunbond nonwoven fabric comprising single fibers of the olefin polymer composition, 180 to 250 ° C., preferably 190 to 230, with one extruder.
- the fiber is spun by discharging with a hole discharge amount, and the spun fiber is cooled with cooling air at 10 to 40 ° C., preferably 20 to 40 ° C., and 2000 to 7000 m / min, preferably 3000 to 6000 m / min.
- the absorbent article of the present invention is an absorbent article formed by using the nonwoven fabric, preferably a long fiber nonwoven fabric, as a top sheet and / or a second sheet, or a sheet (core wrap) that wraps an absorbent body.
- the absorbent article of the present invention includes disposable diapers, pants or sanitary products, urine collection pads, pet sheets and the like.
- a second sheet or a sheet (core wrap) that wraps the absorbent body when using a nonwoven fabric made of fibers of an olefin polymer composition, 100 parts by weight of the olefin polymer, 0.5-30 parts by weight of an anionic surfactant in acid form, or 0.5-30 parts by weight of an anionic surfactant in acid form, and 0.5-30 parts by weight of a nonionic surfactant It is preferable.
- Example 1 A composition containing an anionic surfactant in acid form or a nonionic surfactant in an amount shown in Table 1 with respect to 100 parts by weight of the olefin polymer was prepared as follows. 10 parts by weight of stearic acid (trade name Lunac S-90V, manufactured by Kao Corporation) as an anionic surfactant in acid form, and ethylene oxide adduct of stearyl alcohol (BASF (former Ciba)) as a nonionic surfactant , Irgasurf HL560), melting point (Tm): 142 ° C., MFR: 60 g / 10 min propylene / ethylene random copolymer (PP-1): 79.95 parts by weight, antioxidant (BASF ( A product name Irgafos 168) manufactured by the former Ciba company) was melt-kneaded at 230 ° C. together with 0.05 parts by weight and extruded to prepare a pellet-like masterbatch (MB-1).
- the biting state of Composition-1 into the extruder screw was as good as when no surfactant was added.
- the composition-1 was melt-spun by a spunbond method to obtain a long fiber nonwoven fabric.
- the embossing roll has a rhombus shape, an embossing area ratio of 18%, and an embossing area (area per imprinting) of 0.41 mm 2.
- Heat embossing was performed at a pressure of 60 N / mm to obtain a long fiber nonwoven fabric having a basis weight of 20 g / m 2 .
- the degree of rash was evaluated by the above-described rash evaluation method. The results are shown in Table 1.
- Example 2 to 6 As the anionic surfactant in the acid form and the nonionic surfactant, the following compounds were used, and the same procedure was performed as in Example 1 except that the addition amount was changed as shown in Table 1. Obtained. Using the obtained long-fiber nonwoven fabric, the degree of rash was evaluated by the above-described rash evaluation method. The results are shown in Table 1.
- composition-2 20 parts by weight of MB-2 was added to 80 parts by weight of PP-1 and mixed to obtain a propylene polymer composition (Composition-2).
- the composition-2 was melt-spun by a spunbond method to obtain a long fiber nonwoven fabric.
- the embossing roll has a rhombus shape, an embossing area ratio of 18%, and an embossing area (area per imprinting) of 0.41 mm 2.
- Heat embossing was performed at a pressure of 60 N / mm to obtain a long fiber nonwoven fabric having a basis weight of 20 g / m 2 .
- the degree of rash was evaluated by the above-described rash evaluation method. The results are shown in Table 1.
- Examples 8 and 9 Similar to Example 7 except that the nonionic surfactant used in Example 7 was used, the following compound was used as the anionic surfactant in the acid form, and the addition amount was changed as shown in Table 1.
- the long fiber nonwoven fabric was obtained. Using the obtained long-fiber nonwoven fabric, the degree of rash was evaluated by the above-described rash evaluation method. The results are shown in Table 1.
- Octyl phosphoric acid C8: Takemoto Yushi Co., Ltd.
- Octadecan-1-yl dihydrogen phosphate
- Hydrogen dioctadecyl phosphate C18: Takemoto Yushi Co., Ltd.
- Example 1 A long fiber nonwoven fabric was obtained in the same manner as in Example 1 except that only the nonionic surfactant used in Example 1 was added and no anionic surfactant in acid form was added. Using the obtained long-fiber nonwoven fabric, the degree of rash was evaluated by the above-described rash evaluation method. The results are shown in Table 2.
- PP-1 was melt-spun by the spunbond method to obtain a long fiber nonwoven fabric.
- the embossing roll has a rhombus shape, an embossing area ratio of 18%, and an embossing area (area per imprinting) of 0.41 mm 2.
- Thermal embossing was performed at a pressure of 60 N / mm to obtain a long fiber nonwoven fabric (NW-1) having a basis weight of 20 g / m 2 .
- Comparative Examples 2 to 6 shown in Table 2 the following compounds were dissolved in an isopropyl alcohol aqueous solution adjusted to a soluble concentration to obtain a coating solution, which was applied to NW-1, and then dried. Let Coating and drying were repeated, and the weight after drying was adjusted to a predetermined addition amount shown in Table 2. Using the obtained nonwoven fabric, the degree of rash was evaluated by the rash evaluation method described above. The results are shown in Table 2.
- Citric acid C6: Reagent manufactured by Wako Pure Chemical Industries, Ltd.
- Octyl acid C8: Reagent manufactured by Kyowa Hakko Chemical Co., Ltd.
- Stearyl alcohol C18: manufactured by Kao Corporation Product name Calcoal 8098
- Dodecyl phosphoric acid C12: Nonionic surfactant poly (oxyethylene) 1,6-hexanediol dilaurate manufactured by Takemoto Yushi Co., Ltd. Poly (oxyethylene) sorbitan trioleate (manufactured by Takemoto Yushi Co., Ltd.)
- the fiber of the present invention and the nonwoven fabric containing the fiber can be suitably used as a top sheet or a second sheet of sanitary materials such as disposable diapers and sanitary products.
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Abstract
Description
本発明の繊維及び当該繊維を含む不織布を形成するオレフィン系重合体は、エチレン、プロピレン、1-ブテン、1-ヘキセン、4-メチル-1-ペンテン及び1-オクテン等のα-オレフィンの単独若しくは共重合体であり、具体的には、高圧法低密度ポリエチレン、線状低密度ポリエチレン(所謂LLDPE)、高密度ポリエチレン、エチレン・プロピレンランダム共重合体、エチレン・1-ブテンランダム共重合体等のエチレンの単独重合体あるいはエチレン・α-オレフィン共重合体等のエチレン系重合体;プロピレンの単独重合体(所謂ポリプロピレン)、プロピレン・エチレンランダム共重合体、プロピレン・エチレン・1-ブテンランダム共重合体(所謂ランダムポリプロピレン)、プロピレンブロック共重合体、プロピレン・1-ブテンランダム共重合体等のプロピレン系重合体;1-ブテン単独重合体、1-ブテン・エチレン共重合体、1-ブテン・プロピレン共重合体等の1-ブテン系重合体;ポリ4-メチル-1-ペンテン等が挙げられる。
本発明に係わるプロピレン系重合体としては、通常、融点(Tm)が125℃以上、好ましくは130~165℃の範囲にあるプロピレンの単独重合体若しくはプロピレンと少量のエチレン、1-ブテン、1-ペンテン、1-ヘキセン、1-オクテン、4-メチル-1-ペンテン等の炭素数2以上(但し炭素数3を除く)、好ましくは2~8(但し炭素数3を除く)の1種または2種以上のα-オレフィンとの共重合体が好ましい。
本発明に係わる酸形態のアニオン系界面活性剤とは、水あるいは水分の存在下において、酸性を示すことができるアニオン系界面活性剤である。酸形態のアニオン系界面活性剤としては、特に、緩衝能を有することでpHの変化を緩和する能力を発現できることから、弱酸性を示す酸形態のアニオン系界面活性剤が好ましく、具体的には、脂肪酸、或いは酸形態のリン酸エステル型界面活性剤が好ましい。また、酸形態の当該界面活性剤であれば、完全中和塩でない、例えばモノアルキルリン酸エステル塩のような部分中和塩であっても良い。
本発明に係るノニオン系界面活性剤としては、種々公知のノニオン系界面活性剤を使用することが可能であり、それを添加して繊維を形成したときに繊維表面が親水性を呈するものであれば特に限定されない。ノニオン系界面活性剤の具体例としては、脂肪酸グリセライド、アルコキシ化アルキルフェノール、ポリオキシアルキレン脂肪酸エステル、アルキルポリオキシエチレンアルコール、脂肪酸アミド、ポリオキシアルキレンソルビタン脂肪酸エステル、ショ糖脂肪酸エステル、ソルビタン脂肪酸エステル、脂肪酸アルカノールアミド、ポリオキシアルキレンアルキルエーテル、ポリオキシアルキレンアルキルフェニルエーテル、アルキルポリグルコシド、脂肪酸ジエタノールアミド、アルキルモノグリセリルエーテル等が挙げられる。
本発明に係わるオレフィン系重合体組成物は、前記オレフィン系重合体100重量部に対して、前記酸形態のアニオン系界面活性剤を0.1~30重量部、好ましくは1~15重量部、さらに好ましくは1.5~10重量部含む組成物である。
本発明の繊維及び当該繊維を含む不織布は、前記オレフィン系重合体と前記酸形態のアニオン系界面活性剤及び好ましくは前記ノニオン系界面活性剤を含むオレフィン系重合体組成物の繊維及び当該繊維を含む不織布である。
不織布の原料として短繊維を用いる場合は、種々公知の製造方法、例えば、湿式法あるいは乾式法(カード)により製造し得る。
本発明の長繊維不織布は、種々公知の不織布の製造方法により製造し得るが、スパンボンド法により製造する方法が、生産性に優れる点で好ましい。
本発明の吸収性物品は、前記不織布、好ましくは長繊維不織布をトップシート及び/又はセカンドシート、あるいは吸収体を包むシート(コアラップ)に用いてなる吸収性物品である。本発明の吸収性物品は、使い捨ておむつ、パンツあるいは生理用品、尿取りパッド、ペット用シートなどを含む。
以下の手順にてかぶれの程度を評価した。
1点:3匹とも皮膚の状態に殆ど変化がなかった。
1点:押出機スクリューへの食込み状態良好。
オレフィン系重合体100重量部に対して酸形態のアニオン系界面活性剤、あるいはノニオン系界面活性剤が表1記載の量含む組成物を以下のようにして調整した。酸形態のアニオン系界面活性剤としてステアリン酸(花王社製、商品名ルナックS-90V)10重量部、及びノニオン系界面活性剤としてステアリルアルコールのエチレンオキサイド付加物(BASF社(旧Ciba社)製、Irgasurf HL560)10重量部を、融点(Tm):142℃、MFR:60g/10分のプロピレン・エチレンランダム共重合体(PP-1):79.95重量部、酸化防止剤(BASF社(旧Ciba社)製、商品名Irgafos168)を0.05重量部と共に230℃で溶融混練して押出し、ペレット状のマスターバッチ(MB―1)を用意した。
酸形態のアニオン系界面活性剤、及びノニオン系界面活性剤として、以下の化合物を用い、且つ、添加量を表1に示す通りに変更する以外は実施例1と同様に行い、長繊維不織布を得た。得られた長繊維不織布を用いて、前記記載のかぶれ評価方法によりかぶれの程度を評価した。結果を表1に示す。
オレス-4リン酸(C18):東邦化学工業社製 商品名 フォスファノールRB-410
[実施例7]
オレフィン系重合体100重量部に対して酸形態のアニオン系界面活性剤、あるいはノニオン系界面活性剤が表1記載の量含む組成物を以下のようにして調整した。酸形態のアニオン系界面活性剤としてドデシルリン酸(竹本油脂社製)5重量部、及びノニオン系界面活性剤としてポリ(オキシエチレン)1,6-ヘキサンジオール・ジラウレート(竹本油脂社製)14重量部、ポリ(オキシエチレン)ソルビタン三オレイン酸エステル(竹本油脂社製)1重量部を、融点(Tm):142℃、MFR:60g/10分のプロピレン・エチレンランダム共重合体(PP-1):79.95重量部、酸化防止剤(BASF社(旧Ciba社)製、商品名Irganox1010)を0.05重量部と共に180℃で溶融混練して押出し、ペレット状のマスターバッチ(MB―2)を用意した。
実施例7で用いたノニオン系界面活性剤を用い、酸形態のアニオン系界面活性剤として以下の化合物を用い、且つ、添加量を表1に示す通りに変更する以外は実施例7と同様に行い、長繊維不織布を得た。得られた長繊維不織布を用いて、前記記載のかぶれ評価方法によりかぶれの程度を評価した。結果を表1に示す。
オクチルリン酸(C8):竹本油脂社製
オクタデカン-1-イル= 二水素=ホスファート(C18):竹本油脂社製
リン酸水素ジオクタデシル(C18):竹本油脂社製
実施例1で用いたノニオン系界面活性剤のみを添加し、酸形態のアニオン系界面活性剤を添加しない点以外は実施例1と同様に行い、長繊維不織布を得た。得られた長繊維不織布を用いて、前記記載のかぶれ評価方法によりかぶれの程度を評価した。結果を表2に示す。
PP-1を用いてスパンボンド法により溶融紡糸し、長繊維不織布を得た。紡糸に続いて刻印形状が菱形、エンボス面積率が18%、エンボス面積(刻印一つ当たりの面積)が0.41mm2のエンボスロールを用いて、エンボスロールおよび平滑ロールの温度を125℃、線圧力を60N/mmとして熱エンボス加工し、目付けが20g/m2の長繊維不織布(NW-1)を得た。一方、表2で示す比較例2~6として、以下の化合物を、各々が溶解可能な濃度に調整したイソプロピルアルコール水溶液に溶解し、塗布液を得、これをNW-1に塗布し、その後乾燥させる。塗布、乾燥を繰り返し、乾燥後の重量が表2で示す所定の添加量になるよう調整した。得られた不織布を用いて、前記記載のかぶれ評価方法によりかぶれの程度を評価した。結果を表2に示す。
クエン酸(C6):和光純薬工業社製 試薬
オクチル酸(C8):協和発酵ケミカル社製 試薬
ステアリルアルコール(C18):花王社製 商品名 カルコール8098
ドデシルリン酸(C12):竹本油脂社製
ノニオン系界面活性剤
ポリ(オキシエチレン)1,6-ヘキサンジオール・ジラウレート:竹本油脂社製
ポリ(オキシエチレン)ソルビタン三オレイン酸エステル(竹本油脂社製)
Claims (11)
- オレフィン系重合体100重量部に対して、酸形態のアニオン系界面活性剤を0.1~30重量部含むオレフィン系重合体組成物からなる繊維であって、前記酸形態のアニオン系界面活性剤が、繊維に溶融混錬されてなる繊維。
- 酸形態のアニオン系界面活性剤の疎水性基の炭素数が9以上の脂肪族炭化水素基である請求項1記載の繊維。
- 酸形態のアニオン系界面活性剤が、炭素数が9以上の脂肪酸である請求項1記載の繊維。
- 酸形態のアニオン系界面活性剤が、疎水性基の炭素数が9以上のリン酸エステル型界面活性剤である請求項1記載の繊維。
- オレフィン系重合体組成物がノニオン系界面活性剤を0.1~30重量部含む請求項1に記載の繊維。
- オレフィン系重合体が、プロピレン系重合体である請求項1に記載の繊維。
- プロピレン系重合体が、融点(Tm)が125~155℃の範囲にあるプロピレンと、α-オレフィンからなるプロピレン・α-オレフィンランダム共重合体である請求項6に記載の繊維。
- 繊維が長繊維である請求項1~7のいずれかに記載の繊維。
- 請求項8に記載の繊維からなる不織布。
- 請求項9に記載の不織布を、トップシート及び/又はセカンドシートに用いてなる吸収性物品。
- 請求項9に記載の不織布を、吸収体を包むシートに用いてなる吸収性物品。
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- 2012-04-23 WO PCT/JP2012/060867 patent/WO2012147694A1/ja active Application Filing
- 2012-04-23 CN CN201710661221.7A patent/CN107419353A/zh active Pending
- 2012-04-23 US US14/113,725 patent/US20140051313A1/en not_active Abandoned
- 2012-04-23 CN CN201280020328.9A patent/CN103502517A/zh active Pending
- 2012-04-23 MY MYPI2013701970A patent/MY164756A/en unknown
- 2012-04-23 EP EP12776255.7A patent/EP2703529B1/en active Active
- 2012-04-23 KR KR1020157005260A patent/KR101852243B1/ko active IP Right Grant
- 2012-04-23 JP JP2013512354A patent/JP5819410B2/ja active Active
- 2012-04-23 DK DK18201491.0T patent/DK3456301T3/da active
- 2012-04-23 EP EP18201491.0A patent/EP3456301B1/en active Active
- 2012-04-23 DK DK12776255.7T patent/DK2703529T3/en active
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JPWO2016140357A1 (ja) * | 2015-03-04 | 2017-12-14 | ダイワボウホールディングス株式会社 | エアレイド不織布用レーヨン繊維とその製造方法、エアレイド不織布とその製造方法、及び水解紙 |
JP2019509406A (ja) * | 2016-03-09 | 2019-04-04 | ファイバーテクス・パーソナル・ケア・アクティーゼルスカブ | 高バリア不織布 |
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JP2018035458A (ja) * | 2016-08-30 | 2018-03-08 | ユニ・チャーム株式会社 | 吸水性物品用繊維処理剤、繊維、不織布及び吸水性物品 |
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JP2018199887A (ja) * | 2017-05-30 | 2018-12-20 | 東レ株式会社 | ポリエチレンスパンボンド不織布 |
Also Published As
Publication number | Publication date |
---|---|
CN107419353A (zh) | 2017-12-01 |
KR20130135380A (ko) | 2013-12-10 |
JPWO2012147694A1 (ja) | 2014-07-28 |
JP2016014216A (ja) | 2016-01-28 |
EP2703529A1 (en) | 2014-03-05 |
DK2703529T3 (en) | 2019-02-11 |
DK3456301T3 (da) | 2020-03-23 |
CN103502517A (zh) | 2014-01-08 |
JP5819410B2 (ja) | 2015-11-24 |
EP2703529A4 (en) | 2014-10-01 |
KR20150029768A (ko) | 2015-03-18 |
JP5972442B2 (ja) | 2016-08-17 |
KR101852243B1 (ko) | 2018-04-25 |
EP3456301A1 (en) | 2019-03-20 |
KR101581521B1 (ko) | 2015-12-30 |
EP2703529B1 (en) | 2018-12-05 |
US20140051313A1 (en) | 2014-02-20 |
EP3456301B1 (en) | 2020-02-26 |
MY164756A (en) | 2018-01-30 |
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