WO2008065748A1 - Air permeable and water resistant sheet and absorbent article using the same - Google Patents

Air permeable and water resistant sheet and absorbent article using the same Download PDF

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Publication number
WO2008065748A1
WO2008065748A1 PCT/JP2007/001300 JP2007001300W WO2008065748A1 WO 2008065748 A1 WO2008065748 A1 WO 2008065748A1 JP 2007001300 W JP2007001300 W JP 2007001300W WO 2008065748 A1 WO2008065748 A1 WO 2008065748A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
resistant sheet
breathable
sheet
nonwoven fabric
Prior art date
Application number
PCT/JP2007/001300
Other languages
French (fr)
Japanese (ja)
Inventor
Shunichiro Umehara
Katsuhiro Okugawa
Migaku Suzuki
Original Assignee
Tomoegawa Co., Ltd.
Japan Absorbent Technology Institute
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 Tomoegawa Co., Ltd., Japan Absorbent Technology Institute filed Critical Tomoegawa Co., Ltd.
Publication of WO2008065748A1 publication Critical patent/WO2008065748A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • 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
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • A61F13/51456—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its properties
    • A61F13/51458—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its properties being air-pervious or breathable
    • 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
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • A61F13/51474—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its structure
    • A61F13/51478—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its structure being a laminate, e.g. multi-layered or with several layers
    • 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
    • A61F13/84—Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405—Additives, e.g. for odour, disinfectant or pH 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
    • A61F2013/51002—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 with special fibres
    • A61F2013/51019—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 with special fibres being cellulosic material
    • 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
    • A61F2013/51002—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 with special fibres
    • A61F2013/51023—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 with special fibres being polymeric fibres
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—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
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • A61F13/51401—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material
    • A61F2013/51441—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a fibrous material
    • A61F2013/51452—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a fibrous material being nonwovens
    • 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
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • A61F13/51401—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material
    • A61F2013/51441—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a fibrous material
    • A61F2013/51454—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a fibrous material being papers

Definitions

  • the present invention relates to a breathable water-resistant sheet obtained by laminating a water repellent material and a deodorant on a composite sheet material composed mainly of fine fibrous cellulose and nonwoven fabric mainly used for hygiene or medical products. is there.
  • the present invention also relates to an absorbent article using this breathable water-resistant sheet.
  • a sheet-like or film-like material used for hygiene or medical products does not leak liquid, but requires a certain degree of air permeability. Although it is difficult for a plastic film to penetrate a liquid, it is not breathable due to its dense structure. In other words, as a sheet material for diapers that require water resistance and breathability (non-contact side with the human body), etc.
  • a hydrophobic film such as polyethylene with a filler such as carbonic acid and a dissimilar polymer
  • a microporous film by means such as forming a phase separation layer is used, but the air permeability (JISP 8 1 1 7) is about 100 to 500 seconds / 10 Om L, and practically sufficient ventilation performance
  • the current situation is that it cannot be said that it is effective.
  • Nonwoven fabrics and paper are breathable, but liquid leakage cannot be completely prevented.
  • a sheet material that solves the drawbacks of these sheet materials, a sheet material composed of microfibrous cellulose (non-woven cellulose) and non-woven fabric has been proposed (for example, patents) Reference 1).
  • the fine fibrous cellulose used there is an extremely thin fibrous cellulose having an average fiber length of 0.3 mm or less and a water retention of 15 mL / g or more.
  • What is known as bacterial cellulose which is obtained by microfabrication by target treatment, and what bacteria are known to be known.
  • Mechanical treatment methods include high pressure homogenizers, grinders, refiners, etc. Can be mentioned.
  • the sheet material is produced by applying a dispersion obtained by dispersing the fine fibrous cellulose in a solvent onto a nonwoven fabric to form a thin layer, and removing the solvent from the thin layer.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 10-2 4 8 8 7 2
  • the object of the present invention is to improve the liquid leakage prevention property of a composite sheet material composed of fine fibrous cellulose and a nonwoven fabric and to provide a deodorizing function, so that it can be used for sanitary materials such as diapers and medical materials. It is to provide sheet material.
  • a water-repellent material containing at least one selected from olefin-based water repellents and paraffin-based water repellents and a synthetic resin-based binder is effective, and by adding a crosslinking agent, in particular, a zirconium-based crosslinking agent,
  • the present inventors have found that long-term water leakage is remarkably improved and have arrived at the present invention.
  • the odor can be reduced by adding a deodorant to the water repellent material to solve the problem of generating odor during use or disposal. is there.
  • the breathable water-resistant sheet of the present invention is a breathable water-resistant sheet obtained by laminating a water-repellent material and a deodorant on a composite sheet material composed of a nonwoven fabric and fine fibrous cellulose.
  • the water repellent material is (a) an olefin-based water repellent and a paraffin-based water repellent.
  • a synthetic resin-based binder and (c) a crosslinking agent.
  • the nonwoven fabric is preferably a span melt nonwoven fabric, and the fine fibrous cellulose has an average fiber length of 0.3 mm or less and a water retention of 15 mL / g or more. It is preferable to have it.
  • the synthetic resin binder is preferably a styrene butane resin, and the crosslinking agent is preferably made of zirconium carbonate.
  • the deodorizing agent is made of natural zeolite.
  • the breathable water-resistant sheet of the present invention is densified by a force-rendering process.
  • the absorbent article according to the present invention is characterized in that the breathable water-resistant sheet is used in a backsheet portion of the absorbent article.
  • a composite sheet composed of a nonwoven fabric and fine fibrous cellulose is formed by a film-forming effect of a synthetic resin binder containing at least one selected from an olefin-based water repellent and a paraffin-based water repellent.
  • the long-term water leakage resistance could be further improved by adding a zirconium carbonate-based crosslinking agent.
  • the odor could be reduced more than the conventional product by adding a deodorant to the water repellent material.
  • the air permeability of the breathable polyethylene film used in the backs of commercially available diapers is 10 00 to 500 seconds / 10 O m L, whereas the deodorizing function of the present invention is provided.
  • the air permeability of the breathable water-resistant sheet is less than several tens of seconds OO ml, and when the sheet of the present invention is used for the back sheet of a diaper, the breathability is remarkably improved to suppress the occurrence of stuffiness and fog. Is possible.
  • FIG. 1 is a schematic cross-sectional view of an example of a breathable water-resistant sheet of the present invention.
  • FIG. 2 is a schematic cross-sectional view of an example of a breathable water-resistant sheet of the present invention.
  • FIG. 3 is a flowchart of the method for producing a breathable water-resistant sheet of the present invention.
  • FIG. 4 is a schematic view of a production apparatus used in the production process of the breathable water-resistant sheet of the present invention.
  • FIG. 5 is a plan view of a disposable paper diaper that is an example of the absorbent article of the present invention.
  • FIG. 6 is a cross-sectional view taken along line A_B in FIG.
  • FIG. 7 is a schematic diagram of a device for confirming deodorization performance with ammonia.
  • FIG. 8 is a schematic diagram of a device for confirming deodorization performance with ammonia. Explanation of symbols
  • the breathable water-resistant sheet of the present invention has a water repellent and deodorant mixture 2 laminated on a composite sheet material 1 made of a nonwoven fabric and fine fibrous cellulose, for example, as shown in FIG. Sheet. Further, as shown in FIG. 2, the breathable water-resistant sheet of the present invention has a mixture 2 of a water repellent material and a deodorant laminated on both surfaces of a composite sheet material 1 made of a nonwoven fabric and fine fibrous cellulose. Good.
  • the water repellent material and the deodorant constituting the breathable water-resistant sheet of the present invention include a layer containing a water repellent material, in addition to laminating both as a mixture as shown in FIG. 1 and FIG. It is also possible to divide and laminate the composite sheet material into two layers containing a deodorant, and such an embodiment is also included in the present invention. In this case, the stacking order of the water repellent material-containing layer and the deodorant-containing layer is not limited.
  • Nonwoven fabrics used in the present invention include natural fibers such as wool and cotton, Nonwoven fabrics made of various materials such as chemical fibers such as Nya acetate, synthetic fibers, and inorganic fibers such as glass fibers and carbon fibers can be mentioned.
  • a nonwoven fabric made of synthetic fibers such as polyethylene, polypropylene, polyester, polyester / polyethylene composite fiber, and polyester low-melting polyester composite fiber is preferable.
  • non-woven fabric made of spun ponds (hereinafter referred to as “S”) obtained from polypropylene fibers which are hydrophobic and relatively inexpensive is preferably melt blown nonwoven fabric (hereinafter referred to as “M”) obtained from polypropylene fibers. .
  • spun-melt nonwoven fabrics in which the above S and M are combined are preferable, and SMS or SMMS is particularly suitable for the purpose of the present invention because it has a low basis weight and is dense.
  • SMS or SMMS is particularly suitable for the purpose of the present invention because it has a low basis weight and is dense.
  • the above S and M have different fiber diameters and properties due to different manufacturing methods. For example, melt blown nonwoven fabric
  • SMS is made of ultrafine fibers of about 0.5 to 5 microns, and the bacteria can remove small dust in the air, but the strength is weak, so it is covered with other strong nonwoven fabrics. It needs to be reinforced.
  • SMS is a three-layer structure sandwiched between a weak melt-protruded non-woven fabric (M) and a non-woven fabric made of spun pond (S), which has a fineness of 10 to 50 microns.
  • SMMSS is a non-woven fabric having a four-layer structure in which a melt blow layer is provided in the intermediate layer in order to make the sheet more dense.
  • the fine fibrous cellulose used in the present invention is obtained by mechanically making a pulp or cotton fiber slurry into fine fibers, or what is called bacterial cellulose produced by bacteria (acetic acid bacteria), etc. Can be mentioned.
  • the fine fibrous cellulose is preferably an extremely fine fibrous cell mouth having an average fiber length of 0.3 mm or less and a water retention of 15 mL / g or more.
  • the average fiber length of fine fibrous cellulose exceeds 0.3 mm or when the water retention is less than 15 ml / g, the penetration into the non-woven fabric is difficult and the anchoring effect is lost. There is a possibility that problems such as poor adhesion of the nonwoven fabric and difficulty in forming a uniform texture in the fine fibrous cellulose layer may occur.
  • the water retention was measured by the following method. Weigh 50 mL of an aqueous dispersion of fine fibrous cellulose (0.5 g) into a centrifuge tube (inner diameter 30 mm x length 10 Omm, volume 5 Om L), and measure this into 2000 X g (3300 rpm) for 10 minutes, the sedimentation volume (mL) was read, and the water retention was calculated according to the following formula.
  • the basis weight of the nonwoven fabric used in the present invention is preferably 10 to 50 g / m 2, more preferably 1 2.0 to 20 g / m 2 .
  • the basis weight of the fine fibrous cellulose is preferably from 2.0 to 20 g / m 2 , more preferably from 4.0 to 10 Og / m 2 .
  • the basis weight is less than 2.0 g / m 2 , it is not preferable because when used in absorbent articles such as diapers, water resistance is lowered and urine is likely to leak.
  • the basis weight is more than 20.0 g / m 2 , it is not preferable because the air permeability is lowered and the cost is increased.
  • a method for producing a composite sheet material constituting the present invention first, fine fibrous cellulose is dispersed in water, or in a mixed solvent composed of water and an organic solvent compatible with water. The dispersed dispersion is applied onto the nonwoven fabric to form a composite sheet material. When organic solvents are mixed, methanol, ethanol, etc. are used.
  • the composite sheet material thus produced has a three-layer structure.
  • the three-layer structure means a layer made of nonwoven fabric / nonwoven fabric and a layer made of fine fibrous cellulose / layer made of fine fibrous cellulose.
  • a deodorizing agent may be dispersed together with the fine fibrous cellulose in the above solvent, and coated on the nonwoven fabric to form a composite sheet material.
  • concentration of the dispersion during coating is preferably in the range of 0.5 to 2.0% by weight.
  • the nonwoven fabric used as the base material can contain water or a mixed solvent containing water and can be deaerated to produce a uniform sheet. . Thereafter, the solvent contained in the sheet can be removed from the sheet and dried.
  • the water repellent material constituting the present invention includes (a) at least one selected from an olefin-based water repellent and a paraffin-based water repellent, (b) a synthetic resin-based binder, and (c) a crosslinking agent.
  • an olefin-based water repellent and a paraffin-based water repellent includes (b) at least one selected from an olefin-based water repellent and a paraffin-based water repellent, (b) a synthetic resin-based binder, and (c) a crosslinking agent.
  • Olefin (wax), paraffin, acrylic, fluorine, silicone, etc. are known as water repellents, but fluorine and silicone are expensive but olefin and paraffin in terms of performance.
  • it is necessary to use an olefin-based water repellent or a paraffin-based water repellent because it is not superior to the system and acrylic tends to inhibit air permeability.
  • At least one selected from the olefin-based water repellent and the paraffin-based water repellent includes the following.
  • Olefin-based water repellents are also called wax-based water repellents, and are water repellents mainly composed of natural wax, synthetic wax, fatty acid derivatives, etc., and generally have a solid content concentration of 30-5. Mention may be made of 0% by weight of emulsion.
  • Paraffinic water repellents are solid when they contain many long carbon chains and are called petroleum wax, and when they contain many short carbon chains, they are liquid substances at room temperature and normal pressure and are called liquid paraffin.
  • the paraffin wax-based water repellent can be generally used in the form of an emulsion like the olefin fin water repellent.
  • Examples of the synthetic resin binder include the following.
  • Examples of the synthetic resin binder include styrene butadiene resin, acrylic resin, polyester resin, ethylene vinyl acetate copolymer and the like. These components that can be used as a synthetic resin binder may be used alone or in combination.
  • An acryl resin is preferred because the effect of improving water resistance by film formation is observed.
  • SBR styrene-butadiene resin
  • Examples of the crosslinking agent include the following.
  • Examples of the cross-linking agent include polyamide epichlorohydrin resin, polyamine epoxy hydrin resin, melamine resin, urea resin, ketone resin, glioxal, and zirconium carbonate ammonium.
  • the powerful loxyl group in the zirconium carbonate ammonium hydroxyl group reacts directly with the functional groups in the synthetic resin binder and olefin water repellent or paraffin water repellent and crosslinks to form water resistance and water repellency.
  • a sustained effect of the aqueous agent is obtained, and a long-term water leakage preventing effect is obtained, which is preferable.
  • the relative ratio of at least one selected from the olefin-based water repellent and the baraffin-based water repellent which is a component of the water-repellent material used in the present invention to the synthetic resin-based binder is 40 /
  • a range of 60 to 70/30 is preferable, and a range of 45/5/5 to 60/40 is more preferable.
  • the amount of the crosslinking agent (particularly zirconium-based crosslinking agent) added thereto is the total amount of at least one selected from the olefin-based water repellent and the paraffin-based water repellent and the synthetic resin-based binder.
  • the range is from 4 to 2 parts by weight with respect to parts by weight. If it is added in an amount of more than 4 parts by weight, there is a disadvantage that the pot life of the paint is shortened, and if it is less than 2 parts by weight, sufficient effects of water resistance and water repellency cannot be obtained.
  • deodorant used in the present invention natural Zeorai DOO, synthetic Zeorai DOO, synthetic clay, sepiolite DOO, shirasu balloons, activated carbon, C a C 0 3, titanium dioxide, copper CMC, trivalent iron ions, silver-based (Silver supported zeolite), metal oxides, catechins and the like.
  • natural zeoli is most preferable, especially considering the deodorizing performance, cost, and appearance.
  • FIG. 3 is a flowchart of a production method for producing a breathable water-resistant sheet of the present invention by producing a composite sheet material comprising a nonwoven fabric and fine fibrous cellulose using the nonwoven fabric as a base material.
  • the unwinding roll of nonwoven fabric is supplied to the production line from Unreel.
  • This substrate is filled and saturated with water and organic solvents for the purpose of degassing the air in the substrate (pretreatment of the substrate). After that, a pre-prepared slurry of fine fibrous cellulose is coated on the base material (slurry coating on the base material), and water and organic solvent are drained by a vacuum device (vacuum draining). .
  • the non-woven fabric / fine fibrous cellulose that has been evacuated in vacuum is squeezed and drained (squeezed by pressing) after being pressed by a pressing device via a felt, or is dried and fixed (dried and fixed), or as it is.
  • a dried composite sheet made of non-woven fabric and fine fibrous cellulose is produced.
  • FIG. 4 shows a schematic view of an apparatus for producing a composite sheet material including the above steps.
  • the base material (nonwoven fabric) 8 0 0 unwound from the unwinding device 8 2 4 is arranged on a net conveyor 8 1 0 conveyed by a roller 8 2 2.
  • Filling saturant (used for the purpose of degassing the air in the base material) 8 0 4 is confined to the movement of the moving base material 8 0 0. Supplied on the surface of the substrate 8 0 0 in part 8 0 6.
  • the coating slurry 80 2 is supplied from the head box 8 12 onto the surface of the base material 800 so as to synchronize with the movement of the moving base material 800.
  • the base material 8 0 0 moves while passing between the coating roller 1 8 2 0 and the net conveyor 8 1 0, and is connected to a vacuum pump (not shown) etc.
  • a vacuum pump (not shown) etc.
  • the breathable water-resistant sheet of the present invention is produced by laminating and calendering (calendering) after drying (drying and fixing).
  • calendering in order to improve water resistance after the calendar treatment, it may be heat-treated, or may be wound up as necessary.
  • the manufacturing process of the composite sheet material and the laminating process of the water repellent material are continuous processes, but a breathable water-resistant sheet may be manufactured by separating each process.
  • a composite sheet composed of a nonwoven fabric and fine fibrous cellulose in the above production process A method for laminating a water repellent material and a deodorant on a single material will be described in detail.
  • water and a dispersing agent are added to the deodorizer and dispersed by a disperser such as a disperser for a predetermined time to produce a uniform deodorizer slurry.
  • the main component is prepared by mixing the deodorant slurry with a stirring agent of the olefin-based water repellent or paraffin-based water repellent and the synthetic resin-based binder, which is a constituent material of the water repellent material, and then the composite sheet.
  • the cross-linking agent is added with stirring, and water is added to produce a paint with the specified concentration and viscosity.
  • Examples of the coating method of the mixed paint of water repellent material and deodorant include air knife, Mayer bar, gravure, offset gravure, micro gravure, flexo, reverse roll, blade, curtain, die, etc. Any coating method can be used as long as the coating amount can be obtained.
  • the coating amount is preferably in the range of 1.0 to 10.0 g / m 2 , more preferably in the range of 1.5 to 3. O g / m 2 . If it is less than 1.0 g / m 2, sufficient performance may not be obtained due to water resistance and water repellency, and if it exceeds 10 g / m 2 , the water resistance performance is almost saturated. This is because the cost is high.
  • the amount of deodorant applied in the coating layer is preferably in the range of 0.5 to 10 0.0 g / m 2 , more preferably in the range of 1.5 to 6 O g / m 2 . It is. If it is less than 0.5 g /, sufficient deodorizing performance may not be obtained. If it exceeds 1 O. O g / m 2 , the deodorizing performance is almost saturated and the cost is high.
  • the composite sheet material of the present invention has a nonwoven fabric surface and a fine fibrous cellulosic surface, but the coating of the water repellent and deodorant mixed paint is a highly hydrophilic fine fibrous cell surface. It is effective to do for both sides, but of course it may be done on both sides.
  • a deodorant paint prepared by mixing a synthetic resin binder with the deodorant slurry described above is prepared separately.
  • the breathable water-resistant sheet of the present invention can be produced by applying and drying the water repellent coating material on the composite sheet material.
  • the present invention is an absorbent article using the breathable water-resistant sheet as a back cover.
  • absorbent articles include disposable paper diapers and feminine hygiene products, and the back sheet is a sheet provided on the non-contact surface side with the human body as shown in FIG.
  • FIG. 5 is a developed plan view of the disposable paper diaper according to the present embodiment.
  • FIG. 6 is a cross-sectional view taken along line A_B in FIG.
  • paper diapers As shown in FIGS. 5 and 6, disposable paper diapers (hereinafter referred to as paper diapers).
  • the paper diaper main body 30 includes a top sheet 3 1 made of a liquid-permeable nonwoven fabric or the like provided on the contact surface side with the human body, a back sheet 3 2 provided on the outside side when worn, and a top sheet
  • the absorbent body 3 3 interposed between the front sheet 3 1 and the back sheet 3 2, and the absorbent body 3 3 on the top sheet 3 1 side, along the longitudinal direction of the disposable diaper body 30
  • Gear gear sheet 3 4 and 3 4 provided, and the absorbent body 3 3 in the width direction of the paper diaper main body 30 relative to the gear rubber sheet 3 4 and 3 4, the longitudinal direction of the paper diaper main body 30
  • a fluff pulp obtained by pulverizing wood pulp having liquid retention can be used, and a combination of this with a superabsorbent polymer is preferable.
  • a heat-treated mixture of thermoplastic resin, fluff pulp and superabsorbent polymer is preferable.
  • the superabsorbent polymer may be used by mixing with fluff pulp, or may be partially present in the fluff pulp.
  • the superabsorbent polymer is preferably in the form of particles having a retention property capable of absorbing and retaining a liquid having a weight of 20 times or more of its own weight, and having a gelling property.
  • Such a superabsorbent polymer examples include starch-based, cellulose-based, and synthetic polymers. Particularly, starch-acrylic acid (salt) graft copolymer, saponified propane acrylonitrile copolymer, sodium carbonate, and the like. Poximechi Preferred examples include crosslinked cellulose and acrylic acid (salt) polymers.
  • the breathable water-resistant sheet is used as the backsheet 32 provided on the outer side when worn without contacting the human body.
  • the breathable water-resistant sheet of the present invention has sufficient breathability, so that there is very little human skin rash or rash and sufficient water resistance. Therefore, an absorbent article in which moisture such as urine does not leak can be obtained.
  • Fine fibrous cellulose was prepared as follows.
  • hardwood bleached kraft pulp (trade name: Daiwa Showa Marubeni International Co., Ltd. product name: Peace River 1 LBKP) was disaggregated with a pulper at a concentration of 5% by weight for 20 minutes and transferred to a circulation tank.
  • a fine fibrous cellulose was prepared by beating 5% by weight of pulp slurry with a double disc ⁇ ref ina (hereinafter referred to as DDR) under the following conditions. The conditions were as follows. A load was applied as much as possible without causing metal touch (contact between fixed blade and rotary blade).
  • Disc plate Blade width 2. Omm, groove width 3. Omm
  • Blade clearance range from 0.23mm to 0.1 3mm
  • a polypropylene SMS (AVGO L) nonwoven fabric having the following characteristics was used.
  • SMS configuration spunbond (1) (5. 0 g / m 2)
  • the nonwoven fabric (width 1, 5 O Omm, length 10,000 m) was placed in an unwinding device 824 shown in FIG.
  • the non-woven fabric is supplied onto a net conveyor 810 set through rollers 822.
  • a pretreatment was performed to saturate the non-woven fabric with water by supplying water from the filling saturant supply unit 814 at a rate of 17 kg / min onto the non-woven fabric running at 4 Om / min on the net conveyor 810.
  • the water-filled saturant thus supplied is applied at the constriction 806 of the coater header as the nonwoven fabric travels.
  • the clearance between the coating roller _820 and the net conveyor 810 was set to 75 Om by the height adjustment device.
  • the coating slurry 802 is supplied from the storage tank so that the liquid level of the head box 81 2 is 6 Omm. After the above preliminary treatment was completed, the supplied coating slurry 802 was supplied to the above-mentioned nonwoven fabric at a rate of 42 kg / min. This allows fine fibrous cellulose on the nonwoven fabric Layers were formed.
  • Natural Zeolite (Nitto Flour Chemical Co., Ltd., trade name: SP # 2300) 100 parts by weight of dispersant (Sannopco, Inc., trade name: SN Dispersant) 0.5 parts by weight and water By dispersing for 20 minutes, a uniform deodorant slurry having a solid content of 50% by weight was produced.
  • dispersant Sannopco, Inc., trade name: SN Dispersant
  • olefin-based water repellent (trade name: Petrox P 300, manufactured by Meisei Chemical Co., Ltd.) and 48 parts by weight of styrene butadiene resin (product name: SMARTEX PA 3802, manufactured by Japan A & L Co., Ltd.)
  • styrene butadiene resin product name: SMARTEX PA 3802, manufactured by Japan A & L Co., Ltd.
  • zirconium carbonate-based crosslinking agent (trade name: Paycoat 20, manufactured by Nippon Light Metal Co., Ltd.) Add 2 parts by weight and add water.
  • a paint having a total solid content of 40% by weight was prepared. At this time, the viscosity of the paint was 95 mPa ⁇ s.
  • Average particle size 200 nm
  • the mixed paint of the water repellent material and the deodorant was applied to the surface of the composite sheet material obtained above on the fine fibrous cellulose side by the Mayer bar method using the following bar.
  • force-rendering was performed under the following conditions, followed by treatment at 120 ° C. for 30 minutes with a dryer to produce a breathable water-resistant sheet of the present invention.
  • Fine fibrous cellulose basis weight 5 g / m 2
  • Deodorant coating amount 2. 05 g / m 2
  • Water repellent coating amount 2. 05 g / m 2
  • a breathable water-resistant sheet of the present invention was obtained in the same manner as in Example 1, except that the deodorizer composed of natural zeolite was changed to the deodorizer composed of the following ultrafine shirasu balloon.
  • Aluminosilicate glass Composition 69-73% S i O 2 , AI 2 O 3 1 2-1 3%
  • Particle size 20 m or less
  • Deodorant coating amount 2. 05 g / m2
  • Water repellent coating amount 2. 05 g / m2
  • a breathable water-resistant sheet of the present invention was obtained in the same manner as in Example 1 except that the deodorizer composed of natural zeolite was changed to the deodorizer composed of the following synthetic zeolite.
  • Composition C a O 1 3%, AI 2 O 3 30%
  • SMS nonwoven fabric weight 1 5 g / m 2
  • Deodorant coating amount 2.0 g / m2
  • Water repellent coating amount 2.0 g / m2
  • a breathable water-resistant sheet of the present invention was obtained in the same manner as in Example 1 except that the deodorizer composed of natural zeolite candy was changed to the deodorizer composed of the following sepiolite.
  • composition S i 0 2 60.5%, Mg 023.8%, AI 2 0 3 2.
  • Chemical formula S i 12 Mg 8 O 30 (OH) 4 (OH 2 ) 4 8 H 2 0 Particle size: 5 U m or less 88.3%
  • Deodorant coating amount 2.0 g / m2
  • Water repellent coating amount 2.0 g / m2
  • a breathable water-resistant sheet of the present invention was obtained in the same manner as in Example 1, except that the deodorizer made of natural zeolite was changed to the following deodorizer made of synthetic clay.
  • the deodorizer made of natural zeolite was changed to the following deodorizer made of synthetic clay.
  • Deodorant coating amount 2. 05 g / m2
  • Water repellent coating amount 2. 05 g / m2
  • a breathable water-resistant sheet according to the present invention was obtained in the same manner as in Example 1 except that the deodorizer composed of natural zeolite was changed to the following deodorizer composed of silver-supported zeolite.
  • Deodorant coating amount 2.0 g / m2
  • Water repellent coating amount 2.0 g / m2
  • a breathable water-resistant sheet of the present invention was obtained in the same manner as in Example 1 except that the deodorizer composed of natural zeolite was changed to the deodorizer composed of the following synthetic zeolite.
  • Deodorant coating amount 2.1 g / m 2
  • Example 1 the deodorizer composed of natural zeolite was obtained from the following metal oxide.
  • the breathable water-resistant sheet of the present invention was obtained in the same manner except that the deodorizer was changed to the following production conditions.
  • a low-concentration suspension is used as the deodorant. Therefore, the total solid content of the mixed paint of the deodorant and water repellent material was changed from 40% in Example 1 to 35% by weight.
  • the bar diameter was changed to 0.15 mm force, and 0.2 Omm.
  • Deodorant coating amount 2. 05 g / m 2
  • Water repellent coating amount 2. 05 g / m 2
  • Example 9 the same deodorant and water repellent material as in Example 1 were used, the mixing ratio of the deodorant and water repellent material and the bar wire diameter were changed as shown in Table 1 below.
  • a breathable water-resistant sheet of the present invention was prepared in the same manner as in Example 1 except that the material coating amount was fixed at 2 g and the deodorant coating amount was increased to about twice that of Example 1.
  • Example 10 the same deodorant and water repellent material as in Example 1 were used, the mixing ratio of the deodorant and water repellent material and the bar wire diameter were changed as shown in Table 1 below. Except for fixing the coating amount to 2 g and increasing the coating amount of deodorant to about 3 times the amount of Example 1. Produced a breathable water-resistant sheet of the present invention in the same manner as in Example 1.
  • the breathable water resistance of the present invention was the same as in Example 1 except that the olefin water repellent constituting the water repellent material was changed to a paraffin water repellent (trade name: Petrox P 200, manufactured by Meisei Chemical Co., Ltd.). A sheet was obtained.
  • a paraffin water repellent trade name: Petrox P 200, manufactured by Meisei Chemical Co., Ltd.
  • Deodorant coating amount 2. 05 g / m 2
  • Water repellent coating amount 2. 05 g / m 2
  • the air permeability of the present invention was similarly changed in Example 1 except that the olefin-based water repellent constituting the water repellent material was changed to a paraffinic water repellent (trade name: EP-1) manufactured by Aoki Oil & Fat Co., Ltd. A water resistant sheet was obtained.
  • EP-1 paraffinic water repellent
  • Deodorant coating amount 2. 05 g / m2
  • Water repellent coating amount 2. 05 g / m2
  • Table 1 below shows coating data and physical properties of the breathable water-resistant sheet prepared in Example 9 and Example 10. In Table 1, the coating data and physical properties of Example 1 are shown.
  • Example 1 The composite sheet material obtained in Example 1 was used as a comparative sheet. This sheet is not calendered, and water repellent and deodorant are not applied.
  • Example 1 a sheet for comparison was obtained in the same manner except that the coating material using only the following water repellent material without using a deodorant was applied to the composite sheet material by the following method. It was.
  • Olefin-based water repellent (Madesei Chemical Co., Ltd., trade name: Petrox P 300) 50 parts by weight and styrene butadiene resin (Japan A & L Co., Ltd., trade name: Smarttex PA 3802) After mixing to prepare the main agent, just before coating, zirconium carbonate-based crosslinking agent (Nippon Light Metal Co., Ltd., product name: Paycoat 20) Add 2 parts by weight with stirring, add water, and add 40% total solids % Paint was made. At this time, the viscosity of the paint was 95 mPas and was 17 seconds by the Zainkup method.
  • the above-mentioned water repellent paint was applied to the surface of the composite sheet material obtained in Example 1 on the fine fibrous cellulose side with a flexo coater under the following conditions.
  • the coating amount at this time was 2.3 g / m 2 .
  • Air dryer drying temperature 1 00 ° C
  • a sheet was prepared by applying a force render (force render line pressure: 100 kg / cm) and then treating the dryer at 120 ° C for 30 minutes.
  • force render force render line pressure: 100 kg / cm
  • a sheet for comparison of water resistance was obtained in the same manner as in Example 1, except that the following water-repellent material-only paint without using a deodorant was used.
  • Paraffinic water repellent with a total solid content of 30% by weight (manufactured by Aoki Oil & Fat Co., Ltd.
  • the properties of the paraffinic water repellent used here are as follows.
  • the coating amount on the composite sheet was 2. O g / m 2 .
  • a sheet for comparing water resistance was obtained in the same manner as in Comparative Example 4 except that the coating amount of the water repellent material was 5.0 g / m 2 .
  • a sheet for comparison of water resistance was obtained in the same manner as in Example 1, except that the following water-repellent material-only paint without using a deodorant was used.
  • a sheet for comparing water resistance was obtained in the same manner as in Comparative Example 6 except that the coating amount of the water repellent material was 5.0 g / m 2 .
  • Examples 1-2 and comparative example in which force-rendering is performed in the manufacturing process Measure the air permeability and smoothness before and after the force-rendering process on sheet 2 using a densometer (JISP 8 1 1 7) and a Beck smoothness tester (JISP 8 1 1 9). The results are shown in Table 2.
  • Comparative Example 1 and Comparative Example 3 the air permeability and smoothness were measured in the same manner as described above, and are shown in Table 2 as before force rendering treatment.
  • the air permeability of the water-resistant sheet according to the present invention is improved in the printability due to the smoothness being increased by the calendaring process, and is correlated with the air permeability. It was confirmed that the air permeability with increased.
  • Comparative Example 4 water leakage was observed 10 minutes after the start of the test, and the water resistance was insufficient compared to the Example.
  • Comparative Example 5 no water leakage was observed 1 minute after the start of the test, but water leakage was observed 20 minutes after the start of the test, and the water resistance was insufficient compared to the Examples. It was.
  • Comparative Example 6 water leakage occurred 5 minutes after the start of the test, and the water resistance was insufficient compared to the Example.
  • Comparative Example 7 no water leak was observed 1 minute after the start of the test, but a water leak occurred 15 minutes after the start of the test, and the water resistance was insufficient compared to the Example.
  • the conditions of the above water resistance test are more severe than the actual usage conditions of a commercially available diaper for a baby diaper.
  • the breathable water resistant sheet according to the present invention (Examples 1 to 12) was not commercially available. Even if used as a backsheet for children's diapers, there is no risk of leakage for a long time, and it can withstand actual use.
  • the deodorization performance with ammonia was evaluated by the following procedure using the equipment shown in Fig. 7.
  • the sheets of Examples 1 to 12 and Comparative Examples 1 to 3 were used as samples for the next (1).
  • Example 1 An example demonstrating that the breathable water-resistant sheet obtained in Example 1 can be applied to the backsheet part of a children's diaper will be described.
  • the diaper an actual wearing test was carried out in which an infant is actually put on a product in which the backsheet portion of a commercially available diaper is replaced with the breathable water-resistant sheet of the present invention.

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Abstract

It is intended to provide a sheet usable in sanitary materials such as diapers and medical materials which is a composite sheet material comprising microfibrous cellulose and a nonwoven fabric and has been improved in the property of preventing liquid leakage and the deodorizing performance. An air permeable and water resistant sheet wherein a mixture (2) of a water repellent material with a deodorizer is laminated on a composite sheet material (1) comprising microfibrous cellulose and a nonwoven fabric. It is preferable that: the above-described water repellent material is an air permeable and water resistant sheet containing an olefin-based water repellent agent, a synthetic resin type binder and a crosslinking agent; the above-described nonwoven fabric is a spunmelt nonwoven fabric; the above-described synthetic resin type binder is a styrene butadiene resin; and the crosslinking agent is zirconium ammonium carbonate.

Description

明 細 書  Specification
通気性耐水シート及びそれを用いた吸収体物品  Breathable water-resistant sheet and absorbent article using the same
技術分野  Technical field
[0001] 本発明は、 主に衛生用あるいはメディカル用製品に用いられる微細繊維状 セルロースと不織布からなる複合シ一ト材に撥水材と脱臭剤を積層してなる 通気性耐水シートに関するものである。 また、 本発明はこの通気性耐水シ一 トを用いた吸収体物品に関するものである。  TECHNICAL FIELD [0001] The present invention relates to a breathable water-resistant sheet obtained by laminating a water repellent material and a deodorant on a composite sheet material composed mainly of fine fibrous cellulose and nonwoven fabric mainly used for hygiene or medical products. is there. The present invention also relates to an absorbent article using this breathable water-resistant sheet.
背景技術  Background art
[0002] 衛生用あるいはメディカル用製品に用いられるシ一ト状あるいはフィルム 状材料には、 液体を漏らさない一方で、 ある程度の通気性が必要とされる。 プラスチックフィルムは、 液体を浸透させることは困難であるが、 組織が緻 密であるために通気性を有していない。 すなわち、 耐水性と通気性が要求さ れているおむつのバックシート （人体との非接触側） 等のシート素材として ポリエチレン等の疎水性フィルムに炭酸力ルシゥム等のフィラーと異種ポリ マーとの混合による相分離層を形成するなどの手段による微多孔質フィルム が使用されているが、 透気度 （J I S P 8 1 1 7) 1 00〜500秒/ 1 0 Om L程度で実用上十分な通気性能を発揮するものとはいえないのが現 状である。 また、 不織布や紙などは通気性は有しているが、 液体の漏出を完 全に防止することはできない。 これらのシ一ト材料の欠点を解決するシ一ト 材料としては、 微細繊維状セルロース （M i c r o f i b r i I l a t e d C e I I u I o s e) と不織布からなるシート材が提案されている （例え ば、 特許文献 1参照） 。 そこで用いられる微細繊維状セルロースは平均繊維 長が 0. 3 mm以下であり、 且つ 1 5 m L / g以上の抱水度を有する極めて 細い繊維状セルロースであり、 パルプ又はコットン繊維のスラリーを機械的 処理によりに微細繊維化することによって得られものとバクテリアがっくり だすバクテリアセルロースとよばれるものが知られている。 機械的処理方法 としては高圧ホモジナイザ一、 グラインダー、 リファイナ一等による方法が 挙げられる。 この微細繊維状セルロースを溶媒に分散した分散液を不織布上 に塗工して薄層を形成しておき、 この薄層から脱溶媒することによって上記 シート材が作製される。 [0002] A sheet-like or film-like material used for hygiene or medical products does not leak liquid, but requires a certain degree of air permeability. Although it is difficult for a plastic film to penetrate a liquid, it is not breathable due to its dense structure. In other words, as a sheet material for diapers that require water resistance and breathability (non-contact side with the human body), etc. Mixing a hydrophobic film such as polyethylene with a filler such as carbonic acid and a dissimilar polymer A microporous film by means such as forming a phase separation layer is used, but the air permeability (JISP 8 1 1 7) is about 100 to 500 seconds / 10 Om L, and practically sufficient ventilation performance However, the current situation is that it cannot be said that it is effective. Nonwoven fabrics and paper are breathable, but liquid leakage cannot be completely prevented. As a sheet material that solves the drawbacks of these sheet materials, a sheet material composed of microfibrous cellulose (non-woven cellulose) and non-woven fabric has been proposed (for example, patents) Reference 1). The fine fibrous cellulose used there is an extremely thin fibrous cellulose having an average fiber length of 0.3 mm or less and a water retention of 15 mL / g or more. What is known as bacterial cellulose, which is obtained by microfabrication by target treatment, and what bacteria are known to be known. Mechanical treatment methods include high pressure homogenizers, grinders, refiners, etc. Can be mentioned. The sheet material is produced by applying a dispersion obtained by dispersing the fine fibrous cellulose in a solvent onto a nonwoven fabric to form a thin layer, and removing the solvent from the thin layer.
特許文献 1 ：特開平 1 0— 2 4 8 8 7 2号公報  Patent Document 1: Japanese Patent Application Laid-Open No. 10-2 4 8 8 7 2
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0003] 上記シート材料は、 薄いため通風性もよく、 防塵性やバクテリアバリアー 性を有しているので、 衛生用あるいはメディカル用材料としては優れた材料 である。 しかしながら、 女性用品、 子ども用及び大人用おむつ等の吸収体の 用途としては、 尿などの液体の漏出防止性が不十分であるため、 実用に供さ れていない。 また、 通気性が良いがために、 使用時や廃棄時に臭気が発生す る欠点も存在する。 本発明の目的は、 微細繊維状セルロースと不織布からな る複合シ一ト材の液体漏出防止性を向上させ、 かつ脱臭機能を付与すること によって、 おむつ等の衛生材ゃメディカル材に利用可能なシ一ト材を提供す ることである。  [0003] Since the sheet material is thin, it has good ventilation, and has dust resistance and bacterial barrier properties, so it is an excellent material for hygiene or medical use. However, it has not been put to practical use as an absorbent material for women's products, children's and adult diapers, etc. due to insufficient prevention of leakage of liquids such as urine. In addition, due to good air permeability, there is also a drawback that odor is generated during use and disposal. The object of the present invention is to improve the liquid leakage prevention property of a composite sheet material composed of fine fibrous cellulose and a nonwoven fabric and to provide a deodorizing function, so that it can be used for sanitary materials such as diapers and medical materials. It is to provide sheet material.
課題を解決するための手段  Means for solving the problem
[0004] 微細繊維状セルロースと不織布からなる複合シ一ト材の漏水性を高めると いう課題に対して、 本発明者は、 撥水という機能を満たすと考えられる多く の材料系の中から、 ォレフィン系撥水剤及びパラフィン系撥水剤から選ばれ た少なくとも 1種と合成樹脂系バインダーを含む撥水材が有効であること、 更に架橋剤、 なかでもジルコニウム系架橋剤を添加することにより、 長期的 な漏水性が格段に向上することを見出し、 本発明に到ったものである。 また 通気性が良いがために、 使用時や廃棄時に臭気が発生する課題に対して、 前 記撥水材に脱臭剤を加えることにより臭気を低減できることを見出し、 本願 発明に到ったものである。  [0004] In response to the problem of increasing the water leakage of a composite sheet material composed of fine fibrous cellulose and a nonwoven fabric, the present inventor, among many material systems considered to satisfy the function of water repellency, A water-repellent material containing at least one selected from olefin-based water repellents and paraffin-based water repellents and a synthetic resin-based binder is effective, and by adding a crosslinking agent, in particular, a zirconium-based crosslinking agent, The present inventors have found that long-term water leakage is remarkably improved and have arrived at the present invention. In addition, because it has good air permeability, it has been found that the odor can be reduced by adding a deodorant to the water repellent material to solve the problem of generating odor during use or disposal. is there.
[0005] すなわち本発明の通気性耐水シ一トは、 不織布と微細繊維状セルロースか らなる複合シ一ト材に撥水材と脱臭剤が積層されてなる通気性耐水シ一卜で あって、 前記撥水材が （a ) ォレフィン系撥水剤及びパラフィン系撥水剤か ら選ばれた少なくとも 1種、 （b ) 合成樹脂系バインダー、 並びに （c ) 架 橋剤を含むことを特徴としている。 また、 本発明においては、 不織布はスパ ンメルト不織布であることが好ましく、 微細繊維状セルロースは、 0 . 3 m m以下の平均繊維長を有し、 且つ 1 5 m L / g以上の抱水度を有するもので あることが好ましい。 That is, the breathable water-resistant sheet of the present invention is a breathable water-resistant sheet obtained by laminating a water-repellent material and a deodorant on a composite sheet material composed of a nonwoven fabric and fine fibrous cellulose. Whether the water repellent material is (a) an olefin-based water repellent and a paraffin-based water repellent. And (b) a synthetic resin-based binder, and (c) a crosslinking agent. In the present invention, the nonwoven fabric is preferably a span melt nonwoven fabric, and the fine fibrous cellulose has an average fiber length of 0.3 mm or less and a water retention of 15 mL / g or more. It is preferable to have it.
[0006] さらに、 本発明においては、 合成樹脂系バインダ一としては、 スチレンブ タジェン樹脂であることが、 架橋剤としては炭酸ジルコニウムアンモニゥム からなることがそれぞれ好ましい。 また、 本発明においては、 脱臭剤が天然 ゼォライ トからなることが好ましい。 更に、 本発明の通気性耐水シートは、 力レンダ一処理により通気性耐水シ一ト自体が緻密化されていることが好ま しい。 また、 本発明の吸収体物品は、 上記通気性耐水シートを吸収体物品の バックシ一ト部分に用いたことを特徴としている。  [0006] Further, in the present invention, the synthetic resin binder is preferably a styrene butane resin, and the crosslinking agent is preferably made of zirconium carbonate. In the present invention, it is preferable that the deodorizing agent is made of natural zeolite. Furthermore, it is preferable that the breathable water-resistant sheet of the present invention is densified by a force-rendering process. The absorbent article according to the present invention is characterized in that the breathable water-resistant sheet is used in a backsheet portion of the absorbent article.
発明の効果  The invention's effect
[0007] 本発明おいては、 ォレフィン系撥水剤及びパラフィン系撥水剤から選ばれ た少なくとも 1種を含む合成樹脂系バインダ一による造膜効果により不織布 と微細繊維状セルロースからなる複合シ一ト材の耐漏水性を向上させること ができたことに加え、 炭酸ジルコニウム系架橋剤を加えることにより、 更に 長期的な耐漏水性を向上させることができた。 また通気性が良いがために使 用時及び廃棄時に発生する臭気を減らすため、 前記撥水材に脱臭剤を加える ことにより従来品よりも臭気を低減することができた。 更にこのシートを力 レンダ一処理したものは、 シート全体が緻密化された結果、 密度が上がり、 —層の耐水性向上が確認された。 市販のおむつのバックシ一卜に用いられて いる通気性ポリエチレンフィルムの透気度が 1 0 0〜5 0 0秒/ 1 0 O m L であるのに対して、 本発明の脱臭機能を備えた通気性耐水シ一卜の透気度は 数十秒 O O m L未満であり、 本発明のシートをおむつのバックシートに 使用した場合、 通気性は格段に改良されムレ■カブレの発生を抑えることが できる。 市販のおむつのバックシ一ト部分を本発明の脱臭機能を備えた通気 性耐水シ一卜で置き換えたおむつを用いた乳幼児の着用試験によって、 本願 脱臭機能を備えた通気性耐水シ一トの耐漏水性が実用上十分なものであり、 臭いに関しても官能試験により市販品よりも優れていることが実証された。 図面の簡単な説明 [0007] In the present invention, a composite sheet composed of a nonwoven fabric and fine fibrous cellulose is formed by a film-forming effect of a synthetic resin binder containing at least one selected from an olefin-based water repellent and a paraffin-based water repellent. In addition to being able to improve the water leakage resistance of the timber, the long-term water leakage resistance could be further improved by adding a zirconium carbonate-based crosslinking agent. In addition, in order to reduce the odor generated during use and disposal due to good air permeability, the odor could be reduced more than the conventional product by adding a deodorant to the water repellent material. Furthermore, when the sheet was force-rendered, the density of the sheet increased as a result of densification of the entire sheet, and the water resistance of the layer was improved. The air permeability of the breathable polyethylene film used in the backs of commercially available diapers is 10 00 to 500 seconds / 10 O m L, whereas the deodorizing function of the present invention is provided. The air permeability of the breathable water-resistant sheet is less than several tens of seconds OO ml, and when the sheet of the present invention is used for the back sheet of a diaper, the breathability is remarkably improved to suppress the occurrence of stuffiness and fog. Is possible. According to the wear test of infants using a diaper in which the backsheet portion of a commercially available diaper is replaced with a breathable water-resistant sheet having the deodorizing function of the present invention, The breathable water-resistant sheet with a deodorizing function has practically sufficient water resistance, and the sensory test also demonstrated that it is superior to commercial products in terms of odor. Brief Description of Drawings
[0008] [図 1 ]本発明の通気性耐水シ一卜の一例の模式的断面図である。  FIG. 1 is a schematic cross-sectional view of an example of a breathable water-resistant sheet of the present invention.
[図 2]本発明の通気性耐水シ一卜の一例の模式的断面図である。  FIG. 2 is a schematic cross-sectional view of an example of a breathable water-resistant sheet of the present invention.
[図 3]本発明の通気性耐水シ一卜の製造方法のフローチヤ一トである。  FIG. 3 is a flowchart of the method for producing a breathable water-resistant sheet of the present invention.
[図 4]本発明の通気性耐水シ一卜の製造工程に用いる製造装置の模式図である  FIG. 4 is a schematic view of a production apparatus used in the production process of the breathable water-resistant sheet of the present invention.
[図 5]本発明の吸収体物品の一例である使い捨て紙おむつを展開した平面図で FIG. 5 is a plan view of a disposable paper diaper that is an example of the absorbent article of the present invention.
[図 6]図 5における A _ Bの断面図である。 FIG. 6 is a cross-sectional view taken along line A_B in FIG.
[図 7]アンモニアによる脱臭性能を確認するための器具の模式図である。  FIG. 7 is a schematic diagram of a device for confirming deodorization performance with ammonia.
[図 8]アンモニアによる防臭性能を確認するための器具の模式図である。 符号の説明  FIG. 8 is a schematic diagram of a device for confirming deodorization performance with ammonia. Explanation of symbols
[0009] 1 複合シート材  [0009] 1 Composite sheet material
2 撥水材と脱臭剤の混合物  2 Mixture of water repellent and deodorant
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0010] 本発明の通気性耐水シ一トは、 例えば図 1に示すように、 不織布と微細繊 維状セルロースからなる複合シ一ト材 1に撥水材と脱臭剤の混合物 2が積層 されたシートである。 また、 本発明の通気性耐水シートは、 図 2に示すよう に、 不織布と微細繊維状セルロースからなる複合シ一ト材 1の両面に撥水材 と脱臭剤の混合物 2が積層されていてもよい。  [0010] The breathable water-resistant sheet of the present invention has a water repellent and deodorant mixture 2 laminated on a composite sheet material 1 made of a nonwoven fabric and fine fibrous cellulose, for example, as shown in FIG. Sheet. Further, as shown in FIG. 2, the breathable water-resistant sheet of the present invention has a mixture 2 of a water repellent material and a deodorant laminated on both surfaces of a composite sheet material 1 made of a nonwoven fabric and fine fibrous cellulose. Good.
なお、 本発明の通気性耐水シートを構成する撥水材と脱臭剤は、 図 1およ び図 2に示されるように両者を混合物として積層すること以外に、 撥水材を 含有する層と脱臭剤を含有する層の 2層に分けて複合シ一ト材に積層するこ とも可能で、 このような実施態様も本発明に包含されるものである。 この場 合、 撥水材含有層と脱臭剤含有層の積層順序は問わない。  The water repellent material and the deodorant constituting the breathable water-resistant sheet of the present invention include a layer containing a water repellent material, in addition to laminating both as a mixture as shown in FIG. 1 and FIG. It is also possible to divide and laminate the composite sheet material into two layers containing a deodorant, and such an embodiment is also included in the present invention. In this case, the stacking order of the water repellent material-containing layer and the deodorant-containing layer is not limited.
[001 1 ] 本発明で用いる不織布としては、 羊毛やコットンなどの天然繊維、 レ一ョ ンゃアセテートなどの化学繊維、 合成繊維、 ガラス繊維や炭素繊維などの無 機繊維など、 各種材料で得た不織布を挙げることができる。 特に本発明では 、 ポリエチレン、 ポリプロピレン、 ポリエステル、 ポリエステル/ポリェチ レン複合繊維、 ポリエステル 低融点ポリエステル複合繊維などの合成繊維 でつくられた不織布が好ましい。 なかでも疎水性で比較的コス卜の安いポリ プロピレン繊維で得られたスパンポンド製の不織布 （以下、 Sという） ゃポ リプロピレン繊維で得られたメルトブロー製の不織布 （以下、 Mという） が 好ましい。 更に本発明では、 上記 Sや Mを組み合わせた、 いわゆるスパンメ ルト不織布が好ましく、 特に S M S又は S M M Sは目付が低く緻密なため、 本発明の目的には最適である。 上記 Sと Mは、 それぞれ製法が異なることに より、 繊維径等が異なり、 性質も異なる。 例えば、 メルトブロー製の不織布[001 1] Nonwoven fabrics used in the present invention include natural fibers such as wool and cotton, Nonwoven fabrics made of various materials such as chemical fibers such as Nya acetate, synthetic fibers, and inorganic fibers such as glass fibers and carbon fibers can be mentioned. In particular, in the present invention, a nonwoven fabric made of synthetic fibers such as polyethylene, polypropylene, polyester, polyester / polyethylene composite fiber, and polyester low-melting polyester composite fiber is preferable. Of these, non-woven fabric made of spun ponds (hereinafter referred to as “S”) obtained from polypropylene fibers which are hydrophobic and relatively inexpensive is preferably melt blown nonwoven fabric (hereinafter referred to as “M”) obtained from polypropylene fibers. . Furthermore, in the present invention, so-called spun-melt nonwoven fabrics in which the above S and M are combined are preferable, and SMS or SMMS is particularly suitable for the purpose of the present invention because it has a low basis weight and is dense. The above S and M have different fiber diameters and properties due to different manufacturing methods. For example, melt blown nonwoven fabric
( M) は 0 . 5ミクロンから 5ミクロンくらいの極細の繊維でできており、 菌ゃ小さな空気中のゴミなどを取ることができる一方、 強度が弱いので、 他 の強度のある不織布でカバーし補強する必要がある。 S M Sとは、 この強度 の弱いメルトプロ一製不織布 （M) を、 それよりも繊度は 1 0〜5 0ミクロ ンと太く強度の強いスパンポンド製の不織布 （S ) で挟んだ三層構造になつ ている。 また、 S M M Sとは、 シートをより緻密にするために中間層にメル トブロー層を設けた四層構造の不織布である。 (M) is made of ultrafine fibers of about 0.5 to 5 microns, and the bacteria can remove small dust in the air, but the strength is weak, so it is covered with other strong nonwoven fabrics. It needs to be reinforced. SMS is a three-layer structure sandwiched between a weak melt-protruded non-woven fabric (M) and a non-woven fabric made of spun pond (S), which has a fineness of 10 to 50 microns. ing. SMMSS is a non-woven fabric having a four-layer structure in which a melt blow layer is provided in the intermediate layer in order to make the sheet more dense.
本発明で用いる微細繊維状セルロースは、 パルプ又はコットン繊維のスラ リーを機械的に微細繊維化することによって得られたもの、 あるいは、 パク テリア （酢酸菌） が作りだすバクテリアセルロースとよばれるもの、 などを 挙げることができる。 微細繊維状セルロースは、 0 . 3 m m以下の平均繊維 長を有し、 且つ 1 5 m L / g以上の抱水度を有する極めて細い繊維状セル口 —スであることが好ましい。 微細繊維状セルロースの平均繊維長が 0 . 3 m mを越えた場合や抱水度が 1 5 m L / gより小さい場合は、 不織布への浸透 が難しくなり投錨効果がなくなり、 微細繊維状セルロースと不織布の密着性 が低下することと微細繊維状セルロース層において均一な地合が形成しにく <なる等の問題が生じる恐れがある。 なお、 上記抱水度は次の方法で測定した。 微細繊維状セルロース （0. 5 g ) の水分散液 50 m Lを遠心分離可能な試験管 （内径 30mmx長さ 1 0 Omm、 容積 5 Om L) 中に計り取り、 これを 2000 X g (3300 r p m) で 1 0分間遠心分離して、 沈積量 （m L) を読み取り、 次の式に従って 抱水度を算出した。 The fine fibrous cellulose used in the present invention is obtained by mechanically making a pulp or cotton fiber slurry into fine fibers, or what is called bacterial cellulose produced by bacteria (acetic acid bacteria), etc. Can be mentioned. The fine fibrous cellulose is preferably an extremely fine fibrous cell mouth having an average fiber length of 0.3 mm or less and a water retention of 15 mL / g or more. When the average fiber length of fine fibrous cellulose exceeds 0.3 mm or when the water retention is less than 15 ml / g, the penetration into the non-woven fabric is difficult and the anchoring effect is lost. There is a possibility that problems such as poor adhesion of the nonwoven fabric and difficulty in forming a uniform texture in the fine fibrous cellulose layer may occur. The water retention was measured by the following method. Weigh 50 mL of an aqueous dispersion of fine fibrous cellulose (0.5 g) into a centrifuge tube (inner diameter 30 mm x length 10 Omm, volume 5 Om L), and measure this into 2000 X g (3300 rpm) for 10 minutes, the sedimentation volume (mL) was read, and the water retention was calculated according to the following formula.
抱水度 （m L/g) =沈積量の容量 （m L) /微細繊維状セルロースの量 Water retention (ml / g) = deposition volume (ml) / amount of fine fibrous cellulose
(g) (g)
[0013] 本発明で用いる不織布における目付量は、 1 0〜50 g/m2が好ましく、 更に好ましくは 1 2. 0〜20 g/m2の範囲である。 目付量が 1 0 g/m2 より少ない場合は強度不足となり、 またおむつ等の吸収体物品に用いた場合 には耐水性が低下して尿が漏れ易くなるため好ましくない。 また、 目付量が 50 g / m2より多い場合はシー卜が厚く剛性が高くなり更にコス卜が高くな るため好ましくない。 また、 微細繊維状セルロースの目付量は、 2. 0〜2 0. 0 g/m2が好ましく、 更に好ましくは 4. 0〜 1 0. O g/m2の範囲 にある。 目付量が 2. 0 g/m2より少ない場合は、 おむつ等の吸収体物品に 用いた場合に耐水性が低下して尿が漏れ易くなるため好ましくない。 一方、 目付量が 20. 0 g/m2より多い場合は通気性が低下することとコス卜が高 くなるため好ましくない。 [0013] The basis weight of the nonwoven fabric used in the present invention is preferably 10 to 50 g / m 2, more preferably 1 2.0 to 20 g / m 2 . When the basis weight is less than 10 g / m 2 , the strength is insufficient, and when it is used for absorbent articles such as diapers, the water resistance is lowered and urine is likely to leak, which is not preferable. On the other hand, when the basis weight is more than 50 g / m 2, the sheet is thick and the rigidity is increased, and the cost is further increased. The basis weight of the fine fibrous cellulose is preferably from 2.0 to 20 g / m 2 , more preferably from 4.0 to 10 Og / m 2 . When the basis weight is less than 2.0 g / m 2 , it is not preferable because when used in absorbent articles such as diapers, water resistance is lowered and urine is likely to leak. On the other hand, when the basis weight is more than 20.0 g / m 2 , it is not preferable because the air permeability is lowered and the cost is increased.
[0014] また、 本発明を構成する複合シート材の製造方法としては、 まず、 微細繊 維状セルロースを、 水に分散、 あるいは水及び水と相溶性のある有機溶媒か らなる混合溶媒中に分散させた分散液を、 不織布上に塗工して複合シ一ト材 を形成する。 有機溶媒を混合して使用する場合にはメタノール、 エタノール 等が用いられる。 このようにして製造された複合シート材は、 3層構造を有 するものである。 ここで 3層構造とは、 不織布からなる層/不織布および微 細繊維状セルロースからなる層/微細繊維状セルロースからなる層、 を意味 する。 また、 微細繊維状セルロースを分散させる際に、 微細繊維状セルロー スとともに脱臭剤を上記の溶媒に分散させて、 不織布上に塗工して複合シ一 ト材を形成しても良い。 塗工する際の分散液の濃度は 0 . 5〜2 . 0重量％の範囲にあることが好 ましい。 また、 その際には不織布内の空気による影響を無くすため、 基材と なる不織布は水又は水を含んだ混合溶媒を包含させ、 脱気状態にしておくと 均一なシートを作製することができる。 その後、 このシートからこれに含ま れている前記溶媒を除去し、 乾燥することによって製造することができる。 [0014] In addition, as a method for producing a composite sheet material constituting the present invention, first, fine fibrous cellulose is dispersed in water, or in a mixed solvent composed of water and an organic solvent compatible with water. The dispersed dispersion is applied onto the nonwoven fabric to form a composite sheet material. When organic solvents are mixed, methanol, ethanol, etc. are used. The composite sheet material thus produced has a three-layer structure. Here, the three-layer structure means a layer made of nonwoven fabric / nonwoven fabric and a layer made of fine fibrous cellulose / layer made of fine fibrous cellulose. Further, when the fine fibrous cellulose is dispersed, a deodorizing agent may be dispersed together with the fine fibrous cellulose in the above solvent, and coated on the nonwoven fabric to form a composite sheet material. The concentration of the dispersion during coating is preferably in the range of 0.5 to 2.0% by weight. In that case, in order to eliminate the influence of the air in the nonwoven fabric, the nonwoven fabric used as the base material can contain water or a mixed solvent containing water and can be deaerated to produce a uniform sheet. . Thereafter, the solvent contained in the sheet can be removed from the sheet and dried.
[0015] 本発明を構成する撥水材は、 （a ) ォレフィン系撥水剤及びパラフィン系 撥水剤から選ばれた少なくとも 1種と （b ) 合成樹脂系バインダーと （c ) 架橋剤が含まれる。 撥水剤としては、 ォレフィン （ワックス） 系、 パラフィ ン系、 アクリル系、 フッ素系、 シリコーン系等が知られているが、 フッ素系 、 シリコーン系は高価な割には性能面でォレフィン系およびパラフィン系よ り優れておらず、 アクリル系は通気性を阻害する傾向があるため、 本発明で はォレフィン系撥水剤もしくはパラフィン系撥水剤を用いることが必要であ る。 [0015] The water repellent material constituting the present invention includes (a) at least one selected from an olefin-based water repellent and a paraffin-based water repellent, (b) a synthetic resin-based binder, and (c) a crosslinking agent. It is. Olefin (wax), paraffin, acrylic, fluorine, silicone, etc. are known as water repellents, but fluorine and silicone are expensive but olefin and paraffin in terms of performance. In this invention, it is necessary to use an olefin-based water repellent or a paraffin-based water repellent because it is not superior to the system and acrylic tends to inhibit air permeability.
( a ) ォレフィン系撥水剤及びパラフィン系撥水剤から選ばれた少なくと も 1種としては次のものが挙げられる。 ォレフィン系撥水剤とは、 ワックス 系撥水剤とも呼ばれており、 天然ワックス、 合成ワックス、 脂肪酸誘導体等 を主成分とした撥水剤であり、 一般的に固形分濃度が 3 0〜 5 0重量％のェ マルジヨンの形態のものを挙げることができる。 パラフィン系撥水剤は、 炭 素鎖が長いものを多く含むと固体状となり石油ワックスと呼ばれ、 炭素鎖が 短いものを多く含むと常温常圧下で液体状物質であり流動パラフィンと呼ば れる。 パラフィンワックス系撥水剤においてもォレフィン系撥水剤と同様に 、 一般的にェマルジヨン形態のものを使用することができる。  (a) At least one selected from the olefin-based water repellent and the paraffin-based water repellent includes the following. Olefin-based water repellents are also called wax-based water repellents, and are water repellents mainly composed of natural wax, synthetic wax, fatty acid derivatives, etc., and generally have a solid content concentration of 30-5. Mention may be made of 0% by weight of emulsion. Paraffinic water repellents are solid when they contain many long carbon chains and are called petroleum wax, and when they contain many short carbon chains, they are liquid substances at room temperature and normal pressure and are called liquid paraffin. The paraffin wax-based water repellent can be generally used in the form of an emulsion like the olefin fin water repellent.
[001 6] ( b ) 合成樹脂系バインダーとしては次のものが挙げられる。 合成樹脂系 バインダーとしては、 スチレンブタジエン樹脂、 アクリル樹脂、 ポリエステ ル樹脂、 エチレン一酢酸ビニル共重合体などを挙げることができる。 合成樹 脂系バインダーとして使用することができるこれらの成分は単独で使用して もよいし混合して使用してもよい。 ァクリル樹脂は造膜による耐水性向上効 果が認められるため好ましい。 この中でも特に、 スチレンブタジエン樹脂 （ S B R ) 力 造膜による耐水性向上とォレフィン系撥水剤もしくはパラフィ ン系撥水剤との組み合わせ上、 好ましい。 [001 6] (b) Examples of the synthetic resin binder include the following. Examples of the synthetic resin binder include styrene butadiene resin, acrylic resin, polyester resin, ethylene vinyl acetate copolymer and the like. These components that can be used as a synthetic resin binder may be used alone or in combination. An acryl resin is preferred because the effect of improving water resistance by film formation is observed. Of these, styrene-butadiene resin ( SBR) It is preferable in terms of the combination of improved water resistance by strength film formation and olefin-based water repellent or paraffin-based water repellent.
[0017] ( c ) 架橋剤としては次のものが挙げられる。 架橋剤としては、 ポリアミ ドエピクロロヒドリン樹脂、 ポリアミンェピクロロヒドリン樹脂、 メラミン 樹脂、 尿素樹脂、 ケトン樹脂、 グリオキザール、 炭酸ジルコニウムアンモニ ゥムなどを挙げることができる。 特に、 炭酸ジルコニウムアンモニゥム中の 力ルポキシル基■ ヒドロキシル基は、 合成樹脂系バインダー及びォレフィン 系撥水剤もしくはパラフィン系撥水剤中の官能基と直接反応し架橋すること により、 耐水性及び撥水性剤の持続効果が得られ、 長時間の漏水防止効果が 得られるため好ましい。  [0017] (c) Examples of the crosslinking agent include the following. Examples of the cross-linking agent include polyamide epichlorohydrin resin, polyamine epoxy hydrin resin, melamine resin, urea resin, ketone resin, glioxal, and zirconium carbonate ammonium. In particular, the powerful loxyl group in the zirconium carbonate ammonium hydroxyl group reacts directly with the functional groups in the synthetic resin binder and olefin water repellent or paraffin water repellent and crosslinks to form water resistance and water repellency. A sustained effect of the aqueous agent is obtained, and a long-term water leakage preventing effect is obtained, which is preferable.
[0018] 本発明に用いる撥水材の成分であるォレフィン系撥水剤及びバラフィン系 撥水剤から選ばれた少なくとも 1種と合成樹脂系バインダーの相対的な比率 は、 重量比で 4 0 / 6 0から 7 0 / 3 0の範囲が好ましく、 更に好ましくは 4 5 / 5 5から 6 0 / 4 0の範囲である。 また、 これに添加する架橋剤 （特 にジルコニウム系架橋剤） の量は、 ォレフィン系撥水剤及びパラフィン系撥 水剤から選ばれた少なくとも 1種と合成樹脂系バインダーの合計量 1 0 0重 量部に対して 4重量部から 2重量部の範囲である。 4重量部より多く加えた 場合は塗料のポットライフが短くなる欠点があり、 2重量部未満の場合は耐 水性及び撥水性で十分な効果が得られなくなるためである。  [0018] The relative ratio of at least one selected from the olefin-based water repellent and the baraffin-based water repellent which is a component of the water-repellent material used in the present invention to the synthetic resin-based binder is 40 / A range of 60 to 70/30 is preferable, and a range of 45/5/5 to 60/40 is more preferable. The amount of the crosslinking agent (particularly zirconium-based crosslinking agent) added thereto is the total amount of at least one selected from the olefin-based water repellent and the paraffin-based water repellent and the synthetic resin-based binder. The range is from 4 to 2 parts by weight with respect to parts by weight. If it is added in an amount of more than 4 parts by weight, there is a disadvantage that the pot life of the paint is shortened, and if it is less than 2 parts by weight, sufficient effects of water resistance and water repellency cannot be obtained.
[0019] 本発明に用いる脱臭剤としては、 天然ゼォライ ト、 合成ゼォライ ト、 合成 粘土、 セピオライ ト、 シラスバルーン、 活性炭、 C a C 0 3、 二酸化チタン、 銅 C M C、 三価鉄イオン、 銀系 （銀担持ゼォライ ト） 、 金属酸化物系、 カテ キン等を挙げることができる。 この中でも特に脱臭性能、 コスト、 外観面を 総合的に考慮すると天然ゼォライ 卜が最も好ましい。 [0019] As the deodorant used in the present invention, natural Zeorai DOO, synthetic Zeorai DOO, synthetic clay, sepiolite DOO, shirasu balloons, activated carbon, C a C 0 3, titanium dioxide, copper CMC, trivalent iron ions, silver-based (Silver supported zeolite), metal oxides, catechins and the like. Of these, natural zeoli is most preferable, especially considering the deodorizing performance, cost, and appearance.
[0020] 次に本発明の通気性耐水シートを製造する工程を説明する。 図 3は不織布 を基材として、 不織布と微細繊維状セルロースからなる複合シ一ト材を製造 し、 本発明の通気性耐水シートを製造する製造方法のフローチヤ一トである 。 不織布の巻取原反はアンリールより製造ラインに供給される （基材巻き出 し） 。 この基材は基材中の空気を脱気する目的で、 水及び有機溶剤で充填 - 飽和される （基材の予備処理） 。 その後、 基材上には予め調製した微細繊維 状セルロースのスラリ一をコ一ティングし （基材へのスラリ一コ一ティング ) 、 水及び有機溶媒を真空装置により脱液する （真空脱液） 。 次に、 真空脱 液された不織布/微細繊維状セルロースは、 フヱルトを介したプレス装置に より搾水脱液 （プレスによる搾液） された後に乾燥固定 （乾燥固定） される 力、、 又はそのまま乾燥されて不織布と微細繊維状セルロースからなる複合シ 一ト材を製造する。 Next, a process for producing the breathable water-resistant sheet of the present invention will be described. FIG. 3 is a flowchart of a production method for producing a breathable water-resistant sheet of the present invention by producing a composite sheet material comprising a nonwoven fabric and fine fibrous cellulose using the nonwoven fabric as a base material. The unwinding roll of nonwoven fabric is supplied to the production line from Unreel. ) This substrate is filled and saturated with water and organic solvents for the purpose of degassing the air in the substrate (pretreatment of the substrate). After that, a pre-prepared slurry of fine fibrous cellulose is coated on the base material (slurry coating on the base material), and water and organic solvent are drained by a vacuum device (vacuum draining). . Next, the non-woven fabric / fine fibrous cellulose that has been evacuated in vacuum is squeezed and drained (squeezed by pressing) after being pressed by a pressing device via a felt, or is dried and fixed (dried and fixed), or as it is. A dried composite sheet made of non-woven fabric and fine fibrous cellulose is produced.
[0021 ] 以上の工程をともなう複合シート材の製造装置の概略図を図 4に示す。 巻 出し装置 8 2 4から巻出された基材 （不織布） 8 0 0は、 ローラ一8 2 2で 運搬されるネットコンベア 8 1 0上に配置される。 充填飽和剤 （基材中の空 気を脱気する目的で用いるもの） 8 0 4は、 移動する基材 8 0 0の動きと同 期するように、 充填飽和剤供給器 8 1 4の狭窄部 8 0 6で基材 8 0 0の表面 上に供給される。 また、 コ一ティングスラリー 8 0 2は、 移動する基材 8 0 0の動きと同期するように、 へッドボックス 8 1 2から基材 8 0 0の表面上 に供給される。 その後、 基材 8 0 0は、 移動しながらコーティングローラ一 8 2 0とネットコンベア 8 1 0の間を通過し、 真空ポンプ （図示せず） など に接続された脱液装置 8 5 0により、 脱液されることによって、 不織布と微 細繊維状セルロースからなる複合シ一ト材を得ることができる。  [0021] FIG. 4 shows a schematic view of an apparatus for producing a composite sheet material including the above steps. The base material (nonwoven fabric) 8 0 0 unwound from the unwinding device 8 2 4 is arranged on a net conveyor 8 1 0 conveyed by a roller 8 2 2. Filling saturant (used for the purpose of degassing the air in the base material) 8 0 4 is confined to the movement of the moving base material 8 0 0. Supplied on the surface of the substrate 8 0 0 in part 8 0 6. Further, the coating slurry 80 2 is supplied from the head box 8 12 onto the surface of the base material 800 so as to synchronize with the movement of the moving base material 800. After that, the base material 8 0 0 moves while passing between the coating roller 1 8 2 0 and the net conveyor 8 1 0, and is connected to a vacuum pump (not shown) etc. By removing the liquid, a composite sheet material composed of a nonwoven fabric and fine fibrous cellulose can be obtained.
[0022] 次に図 3のように、 予め用意した撥水材と脱臭剤の混合塗料を上記複合シ 一ト材に塗工 （撥水材と脱臭剤の混合塗料の塗工） することによって積層し 、 乾燥後 （乾燥固定） にカレンダー処理 （カレンダー処理） することにより 、 本発明の通気性耐水シートを製造する。 本発明においては、 カレンダー処 理後に耐水性を向上させるため、 熱処理されてもよいし、 必要に応じて巻き 取ってもよい。 なお図 3では、 複合シート材の製造工程と撥水材の積層工程 が連続工程となっているが、 それぞれの工程を分離して通気性耐水シートを 製造してもよい。  Next, as shown in FIG. 3, by applying a previously prepared mixed paint of water repellent material and deodorant to the composite sheet material (application of a mixed paint of water repellent material and deodorant). The breathable water-resistant sheet of the present invention is produced by laminating and calendering (calendering) after drying (drying and fixing). In the present invention, in order to improve water resistance after the calendar treatment, it may be heat-treated, or may be wound up as necessary. In FIG. 3, the manufacturing process of the composite sheet material and the laminating process of the water repellent material are continuous processes, but a breathable water-resistant sheet may be manufactured by separating each process.
[0023] 次に上記製造工程における不織布と微細繊維状セルロースからなる複合シ 一ト材に撥水材と脱臭剤を積層する方法について詳述する。 まず、 脱臭剤に 水及び分散材を加えてディスパ等の分散機により所定時間分散し、 均一な脱 臭剤スラリーを作製する。 次にこの脱臭剤スラリーに、 撥水材の構成材料で あるォレフィン系撥水剤もしくはパラフィン系撥水剤及び合成樹脂系バイン ダーを撹拌しながら混合して主剤を作成した後、 複合シ一ト材に塗工する直 前に架橋剤を撹拌しながら添加し水を加えて所定の濃度及び粘度の塗料を作 製する。 [0023] Next, a composite sheet composed of a nonwoven fabric and fine fibrous cellulose in the above production process. A method for laminating a water repellent material and a deodorant on a single material will be described in detail. First, water and a dispersing agent are added to the deodorizer and dispersed by a disperser such as a disperser for a predetermined time to produce a uniform deodorizer slurry. Next, the main component is prepared by mixing the deodorant slurry with a stirring agent of the olefin-based water repellent or paraffin-based water repellent and the synthetic resin-based binder, which is a constituent material of the water repellent material, and then the composite sheet. Immediately before application to the material, the cross-linking agent is added with stirring, and water is added to produce a paint with the specified concentration and viscosity.
[0024] 撥水材と脱臭剤の混合塗料の塗工法としては、 エアーナイフ、 メイヤーバ ―、 グラビア、 オフセットグラビア、 マイクログラビア、 フレキソ、 リバ一 スロール、 ブレード、 カーテン、 ダイなどが挙げられるが、 所定の塗工量が 得られれば何れの塗工方式でも差し支えない。 塗工量については 1. 0〜 1 0. 0 g/m2の範囲であることが好ましいが、 更に好ましくは 1. 5〜3. O g/m2の範囲である。 1. 0 g/m2未満の場合は耐水性及び撥水性で十 分な性能が得られない場合があり、 1 0. 0 g/m2より多い場合では耐水性 の性能はほとんど飽和状態であり、 コストが高くなるためである。 塗工層中 の脱臭剤塗工量については 0. 5〜 1 0. 0 g/m2の範囲であることが好ま しいが、 さらに好ましくは 1. 5〜6. O g/m2の範囲である。 0. 5 g/ 未満の場合は十分な脱臭性能が得られない場合があり、 1 0. O g/m2 より多い場合では脱臭性能はほとんど飽和状態でありコス卜が高くなる。 なお本発明の複合シ一ト材は、 不織布面と微細繊維状セルロース面とを有 するが、 撥水材と脱臭剤の混合塗料の塗工は親水性の高い微細繊維状セル口 ース面に対して行うのが効果的であるが、 もちろん両面に行ってもよい。 また、 本発明において撥水材と脱臭剤を 2層に分けて積層する場合は、 前 記で述べた脱臭剤スラリ一に合成樹脂系バインダーを混合して作製した脱臭 剤用塗料と、 別途作製した撥水材用塗料とを、 複合シート材に塗布乾燥する ことによって本発明の通気性耐水シ一トを作製することができる。 [0024] Examples of the coating method of the mixed paint of water repellent material and deodorant include air knife, Mayer bar, gravure, offset gravure, micro gravure, flexo, reverse roll, blade, curtain, die, etc. Any coating method can be used as long as the coating amount can be obtained. The coating amount is preferably in the range of 1.0 to 10.0 g / m 2 , more preferably in the range of 1.5 to 3. O g / m 2 . If it is less than 1.0 g / m 2, sufficient performance may not be obtained due to water resistance and water repellency, and if it exceeds 10 g / m 2 , the water resistance performance is almost saturated. This is because the cost is high. The amount of deodorant applied in the coating layer is preferably in the range of 0.5 to 10 0.0 g / m 2 , more preferably in the range of 1.5 to 6 O g / m 2 . It is. If it is less than 0.5 g /, sufficient deodorizing performance may not be obtained. If it exceeds 1 O. O g / m 2 , the deodorizing performance is almost saturated and the cost is high. The composite sheet material of the present invention has a nonwoven fabric surface and a fine fibrous cellulosic surface, but the coating of the water repellent and deodorant mixed paint is a highly hydrophilic fine fibrous cell surface. It is effective to do for both sides, but of course it may be done on both sides. In the present invention, when the water repellent material and the deodorant are laminated in two layers, a deodorant paint prepared by mixing a synthetic resin binder with the deodorant slurry described above is prepared separately. The breathable water-resistant sheet of the present invention can be produced by applying and drying the water repellent coating material on the composite sheet material.
[0025] 次に本発明の吸収体物品について詳述する。 Next, the absorbent article of the present invention will be described in detail.
本発明は、 前記通気性耐水シートをバックシ一卜に用いた吸収体物品であ る。 The present invention is an absorbent article using the breathable water-resistant sheet as a back cover. The
吸収体物品としては、 使い捨て紙おむつ、 女性用生理用品などを挙げるこ とができ、 バックシートとは図 6に示すように人体と非接触面側に設けられ るシ一トである。  Examples of absorbent articles include disposable paper diapers and feminine hygiene products, and the back sheet is a sheet provided on the non-contact surface side with the human body as shown in FIG.
吸収体物品として、 使い捨て紙おむつを一例として説明する。 図 5は、 本実施の形態における使い捨て紙おむつを展開した平面図である 。 また、 図 6は、 図 5における A _ Bの断面図である。  A disposable paper diaper will be described as an example of the absorbent article. FIG. 5 is a developed plan view of the disposable paper diaper according to the present embodiment. FIG. 6 is a cross-sectional view taken along line A_B in FIG.
[0026] 図 5及び図 6に示すように、 使い捨て紙おむつ （以下、 紙おむっという。  [0026] As shown in FIGS. 5 and 6, disposable paper diapers (hereinafter referred to as paper diapers).
) は、 紙おむつ本体 3 0と、 この紙おむつ本体 3 0を人体に装着するための 止着部 4 0と、 止着部 4 0を係止させるための被着部 5 0とを備えている。  ) Includes a paper diaper main body 30, a fastening part 40 for attaching the paper diaper main body 30 to a human body, and an attachment part 50 for locking the fastening part 40.
[0027] 紙おむつ本体 3 0は、 人体との接触面側に設けられる透液性の不織布等か らなるトップシ一ト 3 1 と、 装着時に外部側に設けられるバックシ一ト 3 2 と、 トップシ一ト 3 1 とバックシ一ト 3 2との間に介装される吸収体 3 3と 、 トップシ一ト 3 1側の吸収体 3 3の両側部に、 紙おむつ本体 3 0の長手方 向に沿って備えられるギヤザ一シート 3 4、 3 4と、 このギヤザ一シート 3 4、 3 4よりも紙おむつ本体 3 0の幅方向の内側の吸収体 3 3上に、 紙おむ つ本体 3 0の長手方向に沿うように備えられる突出部 3 5、 3 5と、 により 主に構成される。  [0027] The paper diaper main body 30 includes a top sheet 3 1 made of a liquid-permeable nonwoven fabric or the like provided on the contact surface side with the human body, a back sheet 3 2 provided on the outside side when worn, and a top sheet The absorbent body 3 3 interposed between the front sheet 3 1 and the back sheet 3 2, and the absorbent body 3 3 on the top sheet 3 1 side, along the longitudinal direction of the disposable diaper body 30 Gear gear sheet 3 4 and 3 4 provided, and the absorbent body 3 3 in the width direction of the paper diaper main body 30 relative to the gear rubber sheet 3 4 and 3 4, the longitudinal direction of the paper diaper main body 30 The projecting parts 3 5 and 3 5 provided along the main line
[0028] 吸収体 3 3としては、 液保持性を有する木材パルプを粉砕したフラッフパ ルプを用いることができ、 これに高吸水性ポリマ一を併用したものが好まし し、。 特に、 熱可塑性樹脂、 フラッフパルプ及び高吸水性ポリマーの混合物を 熱処理したものが好ましい。 該高吸水性ポリマーは、 フラッフパルプと混合 して用いてもよく、 フラッフパルプ中に部分的に存在させてもよい。 上記高 吸水性ポリマーとしては自重の 2 0倍以上の液体を吸収して保持し得る保持 性能を有し、 且つゲル化する性質を有する粒子状のものが好ましい。 このよ うな高吸水性ポリマーとしては、 例えば、 デンプン系、 セルロース系及び合 成ポリマーがあり、 特にデンプン—アクリル酸 （塩） グラフト共重合体、 デ ンプン一ァクリロニトリル共重合体のケン化物、 ナトリウムカルポキシメチ ルセルロースの架橋物及びアクリル酸 （塩） 重合体などが好ましく挙げられ る。 [0028] As the absorbent body 33, a fluff pulp obtained by pulverizing wood pulp having liquid retention can be used, and a combination of this with a superabsorbent polymer is preferable. In particular, a heat-treated mixture of thermoplastic resin, fluff pulp and superabsorbent polymer is preferable. The superabsorbent polymer may be used by mixing with fluff pulp, or may be partially present in the fluff pulp. The superabsorbent polymer is preferably in the form of particles having a retention property capable of absorbing and retaining a liquid having a weight of 20 times or more of its own weight, and having a gelling property. Examples of such a superabsorbent polymer include starch-based, cellulose-based, and synthetic polymers. Particularly, starch-acrylic acid (salt) graft copolymer, saponified propane acrylonitrile copolymer, sodium carbonate, and the like. Poximechi Preferred examples include crosslinked cellulose and acrylic acid (salt) polymers.
[0029] 本発明では、 上記のような吸収体物品 （紙おむつ） において、 人体に接触 しないで装着時に外部側に設けられるバックシ一ト 32として前記通気性耐 水シートを用いたものである。  [0029] In the present invention, in the absorbent article (paper diaper) as described above, the breathable water-resistant sheet is used as the backsheet 32 provided on the outer side when worn without contacting the human body.
このような吸収体物品のバックシートとして本発明の通気性耐水シートを 用いることによって、 十分な通気性を有しているため、 人体皮膚のむれやか ぶれの発現が極めて少なく、 且つ十分な耐水性を有するため、 尿などの水分 が漏れない吸収体物品を得ることができる。  By using the breathable water-resistant sheet of the present invention as the back sheet of such an absorbent article, the breathable water-resistant sheet of the present invention has sufficient breathability, so that there is very little human skin rash or rash and sufficient water resistance. Therefore, an absorbent article in which moisture such as urine does not leak can be obtained.
次に、 本発明の通気性耐水シート及び吸収体物品について、 実施例と比較 例を用いて、 更に詳細に説明する。  Next, the breathable water-resistant sheet and absorbent article of the present invention will be described in more detail using Examples and Comparative Examples.
実施例  Example
[0030] <実施例 1 >  <Example 1>
微細繊維状セルロースを下記のように調製した。  Fine fibrous cellulose was prepared as follows.
はじめに、 広葉樹製晒クラフトパルプ （大昭和■丸紅インターナショナル 社製 商品名 ： ピースリバ一 LBKP) をパルパ一にて 5重量％濃度にて 20分間離解し、 循環タンクに移送した後に 3. 5重量％濃度に調製した。 3. 5重量％のパルプスラリーを以下の条件によりダブル■ディスク ■ リフ アイナ一 （以下、 DDRという） にて叩解して微細繊維状セルロースを調製 した。 条件は下記のとおりとした。 メタルタツチ （固定刃と回転刃の接触） を起こさない状態でできるだけ負荷をかけた。  First, hardwood bleached kraft pulp (trade name: Daiwa Showa Marubeni International Co., Ltd. product name: Peace River 1 LBKP) was disaggregated with a pulper at a concentration of 5% by weight for 20 minutes and transferred to a circulation tank. Prepared. 3. A fine fibrous cellulose was prepared by beating 5% by weight of pulp slurry with a double disc ■ ref ina (hereinafter referred to as DDR) under the following conditions. The conditions were as follows. A load was applied as much as possible without causing metal touch (contact between fixed blade and rotary blade).
D D R機種：相川鉄工社製 AW 1 4  D D R model: AW 1 4
ディスクプレート ：刃幅 2. Omm、 溝幅 3. Omm Disc plate: Blade width 2. Omm, groove width 3. Omm
D D Rへのパルプ流量： 1 m2/分 Pulp flow to DDR: 1 m 2 / min
DDRの平均パス回数： 1 00回  Average number of DDR passes: 1 00
刃のクリアランス： 0. 23mm〜0. 1 3mmの範囲  Blade clearance: range from 0.23mm to 0.1 3mm
[0031] 調製した微細繊維状セルロースの特性は以下のとおりであった。 [0031] The characteristics of the prepared fine fibrous cellulose were as follows.
抱水度： 27mL/g 平均繊維長： 0. 1 5mm Water retention: 27mL / g Average fiber length: 0.1 5mm
0. 5重量0 /oスラリ一の粘度： 320 m P a ■ s 0.5 Viscosity of 0 / o slurry: 320 m Pa ■ s
最終濃度： 3. 0重量％ (シール水により希釈されため）  Final concentration: 3.0% by weight (because it is diluted with sealing water)
[0032] <微細繊維状セルローススラリーの調製 > <Preparation of fine fibrous cellulose slurry>
上記微細繊維状セルロースにエタノール/水 =65/35 (重量比） 、 微 細繊維状セルロースの濃度 0. 7重量％となるようにェタノ一ルを添加して 微細繊維状セルローススラリーを調製した。  Ethanol was added to the fine fibrous cellulose so that ethanol / water = 65/35 (weight ratio) and the fine fibrous cellulose concentration was 0.7% by weight to prepare a fine fibrous cellulose slurry.
[0033] <不織布 > [0033] <Nonwoven fabric>
以下の特性を有するポリプロピレン製の S MS (AVGO L社製） 不織布 を用いた。  A polypropylene SMS (AVGO L) nonwoven fabric having the following characteristics was used.
目付量： 1 5 g/m2 Weight per unit area: 1 5 g / m 2
SMSの構成：スパンポンド （ 1 ) (5. 0 g/m2) SMS configuration: spunbond (1) (5. 0 g / m 2)
メルトブローン （5. 0 g/m2) Meltblown (5.0 g / m 2 )
スパンポンド （2) (5. 0 g/m2) Span pound (2) (5.0 g / m 2 )
耐水性： 1 50mmH2O Water resistance: 1 50mmH 2 O
[0034] <不織布への微細繊維状セルローススラリーのコーティング > [0034] <Coating of fine fibrous cellulose slurry on non-woven fabric>
上記不織布 （幅 1 , 5 O Omm、 長さ 1 0, 000 m) を図 4に示す巻出 し装置 824に配置した。 不織布はローラ一 822を介してセッ卜されてい るネットコンベア 81 0上に供給される。 ネットコンベア 81 0上で 4 Om /分にて走行する不織布上に充填飽和剤供給機 81 4から水を 1 7 k g/分 の割合で供給して不織布を水で飽和させる予備処理を行った。 このように供 給された水からなる充填飽和剤は不織布の走行にしたがってコ一ターヘッダ —の狭窄部 806で塗布される。 尚、 コ一ティングローラ _820とネット コンベア 81 0とのクリアランスは、 高さ調整装置により 75 O mに設定 した。 一方、 コ一ティングスラリー 802は貯蔵タンクからヘッドボックス 81 2の液面高さが 6 Ommとなるように供給される。 上述の予備処理が完 了した後、 供給されたコ一ティングスラリー 802を 42 k g/分の割合で 、 上述の不織布に供給した。 これにより、 不織布上に微細繊維状セルロース 層を形成させた。 The nonwoven fabric (width 1, 5 O Omm, length 10,000 m) was placed in an unwinding device 824 shown in FIG. The non-woven fabric is supplied onto a net conveyor 810 set through rollers 822. A pretreatment was performed to saturate the non-woven fabric with water by supplying water from the filling saturant supply unit 814 at a rate of 17 kg / min onto the non-woven fabric running at 4 Om / min on the net conveyor 810. The water-filled saturant thus supplied is applied at the constriction 806 of the coater header as the nonwoven fabric travels. The clearance between the coating roller _820 and the net conveyor 810 was set to 75 Om by the height adjustment device. On the other hand, the coating slurry 802 is supplied from the storage tank so that the liquid level of the head box 81 2 is 6 Omm. After the above preliminary treatment was completed, the supplied coating slurry 802 was supplied to the above-mentioned nonwoven fabric at a rate of 42 kg / min. This allows fine fibrous cellulose on the nonwoven fabric Layers were formed.
[0035] 次にこれを脱液装置 850の上部に供給し、 _30 k P aの真空により脱 液し、 シリンダ一ドライヤーで 1 00°Cの温度で乾燥して巻き取り複合シ一 ト材を得た。 この装置では、 脱液パートにおける排液及びドライパートの排 気中のエタノールは溶剤回収装置にて回収し、 再利用する。 このため、 ドラ ィパートは完全密閉しエタノールの引火■燃焼を防ぐため、 窒素ガスにて充 填した。 なお、 複合シート材の物性は以下のとおりである。 この結果、 複合 シートの耐水圧 （400mmH2O) は不織布の耐水圧 （1 50mmH2O) に比べ大幅に向上していることが確認された。 [0035] Next, this is supplied to the upper part of the dewatering device 850, dewatered by a vacuum of _30 kPa, dried with a cylinder drier at a temperature of 100 ° C, and the rolled up composite sheet material is obtained. Obtained. In this equipment, the drainage liquid from the drainage part and the ethanol in the exhaustion from the dry part are recovered by the solvent recovery unit and reused. Therefore, the dry part was completely sealed and filled with nitrogen gas to prevent ethanol ignition and combustion. The physical properties of the composite sheet material are as follows. As a result, water pressure resistance of the composite sheet (400mmH 2 O) It was confirmed that a significant improvement compared with the water pressure resistance (1 50mmH 2 O) of the nonwoven fabric.
目付量： 20 g/m2 (SMS ： 1 5 g/m2、 微細繊維状セルロース ： 5 g/m2) Weight per unit area: 20 g / m 2 (SMS: 15 g / m 2 , fine fibrous cellulose: 5 g / m 2 )
耐水圧： 400 m m H 2 O Water pressure resistance: 400 mm H 2 O
[0036] <脱臭剤分散スラリーの作製 > <Preparation of deodorant dispersed slurry>
天然ゼォライ ト （日東粉化工業株式会社製 商品名 ： S P#2300) 1 00重量部に分散剤 （株式会社サンノプコ社製 商品名 ： S Nデイスバーサ ント） 0. 5重量部と水を加えてディスパにより 20分間分散することによ り固形分濃度 50重量％の均一な脱臭剤スラリーを作製した。  Natural Zeolite (Nitto Flour Chemical Co., Ltd., trade name: SP # 2300) 100 parts by weight of dispersant (Sannopco, Inc., trade name: SN Dispersant) 0.5 parts by weight and water By dispersing for 20 minutes, a uniform deodorant slurry having a solid content of 50% by weight was produced.
[0037] <撥水材と脱臭剤の混合塗料の作製 > [0037] <Preparation of mixed paint of water repellent material and deodorant>
上記の脱臭剤スラリーにォレフィン系撥水剤 （明成化学工業株式会社製 商品名 ：ペトロックス P 300) 50重量部およびスチレンブタジエン樹脂 (日本 A&L株式会社製 商品名 ：スマ一テックス P A 3802) 48重量 部を順次撹拌しながら混合して主剤を作製した後、 塗工する直前に炭酸ジル コニゥム系架橋剤 （日本軽金属株式会社製 商品名 ：ペイコート 20) 2重 量部を撹拌しながら添加し水を加えて全固形分 40重量％の塗料を作製した 。 このとき、 塗料の粘度は 95mP a ■ Sであった。  50 parts by weight of olefin-based water repellent (trade name: Petrox P 300, manufactured by Meisei Chemical Co., Ltd.) and 48 parts by weight of styrene butadiene resin (product name: SMARTEX PA 3802, manufactured by Japan A & L Co., Ltd.) Are mixed with stirring in order to prepare the main agent, and immediately before coating, zirconium carbonate-based crosslinking agent (trade name: Paycoat 20, manufactured by Nippon Light Metal Co., Ltd.) Add 2 parts by weight and add water. Thus, a paint having a total solid content of 40% by weight was prepared. At this time, the viscosity of the paint was 95 mPa · s.
[0038] ここで用いた天然ゼォライ ト、 ォレフィン系撥水剤、 スチレンブタジエン 樹脂および炭酸ジルコニウム系架橋剤の性質は下記のとおりである。 [0038] The properties of natural zeolite, olefin-based water repellent, styrene butadiene resin and zirconium carbonate-based crosslinking agent used here are as follows.
(日東粉化工業株式会社製 商品名 ： S P#2300) 成分：天然ゼォライ ト （Ca、 K2、 N a 2) {A I S i 5012} 2 - 7(Product name: SP # 2300, manufactured by Nitto Flour Industry Co., Ltd.) Ingredients: Natural Zeorai Doo (Ca, K 2, N a 2) {AIS i 5 0 12} 2 - 7
H20 H 2 0
結晶構造： モルデナィ ト系  Crystal structure: Mordenite
p H ： 6. 4  pH: 6.4
塩基置換容量： 1 60〜1 90me q/1 00 g  Base substitution capacity: 1 60 ~ 1 90me q / 1 00 g
水分： 7. 4 %  Moisture: 7.4%
白色度： 60%  Whiteness: 60%
[0039] (明成化学工業株式会社製 商品名 ：ペトロックス P 300)  [0039] (Product name: Petrox P 300, manufactured by Meisei Chemical Industry Co., Ltd.)
成分： ワックス系ェマルジヨン  Ingredients: Wax emerald
外観： 白色液体  Appearance: White liquid
p H ： 8. 5  pH: 8.5
イオン性： ノニオン  Ionicity: Nonion
固形分濃度： 34重量％  Solid content: 34% by weight
[0040] (日本 A &L株式会社製 商品名 ：スマ一テックス P A 3802) [0040] (Product name: SMARTEX P A 3802, manufactured by Japan A & L Co., Ltd.)
成分：スチレン■ ブタジエン■ラテックス  Ingredients: Styrene butadiene latex
モノマ一組成： ブタジエン 30、 スチレン 59、 MMA3、 A C N 5 Monomer composition: Butadiene 30, styrene 59, MMA3, A C N 5
、 酸 3 The acid 3
T g ： 21 °C  T g: 21 ° C
平均粒径： 200 n m  Average particle size: 200 nm
外観： 白色液体  Appearance: White liquid
p H ： 6. 1  pH: 6.1
イオン性： ァニオン  Ionicity: Anyon
固形分濃度： 48重量％  Solid content: 48% by weight
[0041] (日本軽金属株式会社製 商品名 ：ペイコート 20) [0041] (Nippon Light Metal Co., Ltd., trade name: Paycoat 20)
成分：炭酸ジルコニウムアンモニゥム  Ingredients: Ammonium zirconium carbonate
化学式： （N H4) 2 [Z r (C03) 2 (OH) 2] Chemical formula: (NH 4 ) 2 [Z r (C0 3 ) 2 (OH) 2 ]
外観：無色一淡黄色透明な液体  Appearance: colorless and light yellow transparent liquid
p H ： 9. 0〜9. 5 イオン性： ァニオン pH: 9.0 to 9.5 Ionicity: Anyon
固形分濃度： 20重量％  Solid content concentration: 20% by weight
[0042] <撥水材と脱臭剤の混合塗料の塗工による通気性耐水シ一卜の作製 > [0042] <Preparation of breathable water-resistant sheet by application of mixed paint of water repellent material and deodorant>
前記で得た複合シ一ト材の微細繊維状セルロース側の面に前記の撥水材と 脱臭剤の混合塗料を次のバーを使用してメイヤーバー方式により塗工した。  The mixed paint of the water repellent material and the deodorant was applied to the surface of the composite sheet material obtained above on the fine fibrous cellulose side by the Mayer bar method using the following bar.
使用バ一： 0. 1 5mm  Use bar: 0.1 5mm
乾燥温度： 1 1 0°Cで 2分間  Drying temperature: 1 2 minutes at 10 ° C
塗工後、 下記の条件で力レンダ一掛けを行った後に乾燥機で 1 20°Cで 3 0分間処理することにより本発明の通気性耐水シ一トを作製した。  After coating, force-rendering was performed under the following conditions, followed by treatment at 120 ° C. for 30 minutes with a dryer to produce a breathable water-resistant sheet of the present invention.
力レンダ一：熊谷理機株式会社製 3本ロールスーパ一力レンダ _5 0 FC F-200 E  Power render: Three roll super power render made by Kumagai Riki Co., Ltd. _5 0 FC F-200 E
力レンダ一掛け線圧： 1 00 k g / c m  Force render line pressure: 100 k g / c m
力レンダ一速度： 1 Om/分  Force render speed: 1 Om / min
ロール温度： 30°C  Roll temperature: 30 ° C
この通気性耐水シ一卜の物性を測定した結果を以下に示す。  The results of measuring the physical properties of this breathable water resistant sheet are shown below.
S MS不織布目付量： 1 5 g/m2 S MS non-woven fabric weight: 15 g / m 2
微細繊維状セルロース目付量： 5 g/m2 Fine fibrous cellulose basis weight: 5 g / m 2
脱臭剤塗工量： 2. 05 g/m2 Deodorant coating amount: 2. 05 g / m 2
撥水材塗工量： 2. 05 g/m2 Water repellent coating amount: 2. 05 g / m 2
撥水度 （J I S P 81 37) ： R 1 0  Water repellency (J I S P 81 37): R 1 0
ガ一レ一透気度： 2秒/ 1 0 Om L  Gas per one air permeability: 2 seconds / 1 0 Om L
[0043] <実施例 2> <Example 2>
実施例 1において、 天然ゼォライ 卜からなる脱臭剤を次の超微粒シラスバ ルーンからなる脱臭剤に変更した以外は同様にして本発明の通気性耐水シ一 トを得た。  A breathable water-resistant sheet of the present invention was obtained in the same manner as in Example 1, except that the deodorizer composed of natural zeolite was changed to the deodorizer composed of the following ultrafine shirasu balloon.
(株式会社シラックス社製 商品名 ： シラックスファインバルーン S FB— 1 01 )  (Product name: Sylax Fine Balloon S FB—101)
成分： アルミノ珪酸塩ガラス 組成： S i O 269〜 73 %、 A I 2 O 31 2〜 1 3 % Ingredients: Aluminosilicate glass Composition: 69-73% S i O 2 , AI 2 O 3 1 2-1 3%
粒径： 20 m以下  Particle size: 20 m or less
外部構造：球状  External structure: spherical
内部構造：ハニカム （隔壁多数）  Internal structure: Honeycomb (Many partition walls)
粒子密度： 0. 6〜 0. 8  Particle density: 0.6 to 0.8
かさ密度： 0. 23〜0. 32  Bulk density: 0.23 to 0.32
ハンター白色度： 80%  Hunter whiteness: 80%
[0044] 上記通気性耐水シ一卜の物性を測定した結果を以下に示す。 [0044] The results of measuring the physical properties of the breathable water-resistant sheet are shown below.
S MS不織布目付量： 1 5 g/m2 S MS non-woven fabric weight: 15 g / m 2
M F C塗工量： 5 g/m2 MFC coating amount: 5 g / m 2
脱臭剤塗工量： 2. 05 g/m2  Deodorant coating amount: 2. 05 g / m2
撥水材塗工量： 2. 05 g/m2  Water repellent coating amount: 2. 05 g / m2
撥水度 （J I S P 81 37) ： R 1 0  Water repellency (J I S P 81 37): R 1 0
ガ一レ一透気度： 6秒/ 1 0 Om L  Gas per one air permeability: 6 seconds / 1 0 Om L
[0045] <実施例 3> <Example 3>
実施例 1において、 天然ゼォライ 卜からなる脱臭剤を次の合成ゼォライ ト からなる脱臭剤に変更した以外は同様にして本発明の通気性耐水シートを得 た。  A breathable water-resistant sheet of the present invention was obtained in the same manner as in Example 1 except that the deodorizer composed of natural zeolite was changed to the deodorizer composed of the following synthetic zeolite.
(日本化学工業株式会社製 商品名 ：ゼォスター C A _ 1 1 0 P) 化学名 ： カルシウム A型ゼォライ ト  (Nippon Chemical Industry Co., Ltd. product name: ZEOSTAR C A _ 1 1 10 P) Chemical name: Calcium A type zeolite
組成： C a O 1 3 %、 A I 2 O 330 % Composition: C a O 1 3%, AI 2 O 3 30%
構造式： CaO - N a02 - A I 203 - x S i 02 - y H20 x = 2 y = 0〜 1 Structural formula: CaO-N a0 2 -AI 2 0 3 -x S i 0 2 -y H 2 0 x = 2 y = 0 to 1
平均粒径： 2. 9 m  Average particle size: 2.9 m
外部構造：角状  External structure: square
熱杓減量： 4. 1 % (800°C)  Heat loss: 4.1% (800 ° C)
p H ： 1 1. 5 (5 %スラリー、 20 °C)  pH: 1 1.5 (5% slurry, 20 ° C)
[0046] 上記通気性耐水シ一卜の物性を測定した結果を以下に示す。 SMS不織布目付量： 1 5 g/m2 [0046] The measurement results of the physical properties of the breathable water-resistant sheet are shown below. SMS nonwoven fabric weight: 1 5 g / m 2
M F C塗工量： 5 g/m2 MFC coating amount: 5 g / m 2
脱臭剤塗工量： 2. 0 g/m2  Deodorant coating amount: 2.0 g / m2
撥水材塗工量： 2. 0 g/m2  Water repellent coating amount: 2.0 g / m2
撥水度 （J I S P 8 1 37) ： R 1 0  Water repellency (J I S P 8 1 37): R 1 0
ガ一レ一透気度： 3秒/ 1 0 Om L  Gas permeance: 3 seconds / 1 0 Om L
[0047] <実施例 4> <Example 4>
実施例 1において、 天然ゼォライ 卜からなる脱臭剤を次のセピオライ トか らなる脱臭剤に変更した以外は同様にして本発明の通気性耐水シートを得た  A breathable water-resistant sheet of the present invention was obtained in the same manner as in Example 1 except that the deodorizer composed of natural zeolite candy was changed to the deodorizer composed of the following sepiolite.
(楠本化成株式会社製 商品名 ： PAN S I L) (Product name: PAN S I L, manufactured by Enomoto Kasei Co., Ltd.)
化学名 ：セピオライ ト  Chemical name: Sepiolite
組成： S i 0260. 5%、 Mg 023. 8%、 A I 2032. 4% 化学式： S i 12Mg8O30 (OH) 4 (OH2) 48 H20 粒径： 5 U m以下 88. 3% Composition: S i 0 2 60.5%, Mg 023.8%, AI 2 0 3 2. 4% Chemical formula: S i 12 Mg 8 O 30 (OH) 4 (OH 2 ) 4 8 H 2 0 Particle size: 5 U m or less 88.3%
外部構造：微細繊維束  External structure: Fine fiber bundle
強熱減量： 1 1. 3 % ( 1 000°C)  Loss on ignition: 1 1.3% (1 000 ° C)
B E T比表面積： 270m2/g BET specific surface area: 270m 2 / g
[0048] 上記通気性耐水シ一卜の物性を測定した結果を以下に示す。 [0048] The results of measuring the physical properties of the breathable water-resistant sheet are shown below.
S MS不織布目付量： 1 5 g/m2 S MS non-woven fabric weight: 15 g / m 2
M F C塗工量： 5 g/m2 MFC coating amount: 5 g / m 2
脱臭剤塗工量： 2. 0 g/m2  Deodorant coating amount: 2.0 g / m2
撥水材塗工量： 2. 0 g/m2  Water repellent coating amount: 2.0 g / m2
撥水度 （J I S P 8 1 37) ： R 1 0  Water repellency (J I S P 8 1 37): R 1 0
ガ一レ一透気度： 8秒/ 1 0 Om L  Gas per one air permeability: 8 seconds / 1 0 Om L
[0049] <実施例 5> <Example 5>
実施例 1において、 天然ゼォライ 卜からなる脱臭剤を次の合成粘土からな る脱臭剤に変更した以外は同様にして本発明の通気性耐水シートを得た。 (水澤化学工業株式会社製 商品名 ： ミズカナイ ト H P) A breathable water-resistant sheet of the present invention was obtained in the same manner as in Example 1, except that the deodorizer made of natural zeolite was changed to the following deodorizer made of synthetic clay. (Product name: Mizukanite HP, manufactured by Mizusawa Chemical Co., Ltd.)
物質名 ： シリカ、 アルミナ、 金属酸化物から合成された粘土  Material name: Clay synthesized from silica, alumina, metal oxide
粒径： 3〜5 m、 平均 3. 8 8 U m  Particle size: 3-5 m, average 3.8 8 U m
見掛け密度： 0. 2〜0. 4  Apparent density: 0.2 to 0.4
乾燥減量： 1 0%以下  Loss on drying: 10% or less
B E T比表面積： 2 50m2/ g以上 BET specific surface area: 2 50m 2 / g or more
p H ： 8. 5〜 "！ 0. 5 ( J I S - K- 1 47 4)  pH: 8.5 ~ "! 0.5 (JI S-K-1 47 4)
[0050] 上記通気性耐水シ一卜の物性を測定した結果を以下に示す。 [0050] The results of measuring the physical properties of the breathable water-resistant sheet are shown below.
S MS不織布目付量： 1 5 g/m2 S MS non-woven fabric weight: 15 g / m 2
M F C塗工量： 5 g/m2 MFC coating amount: 5 g / m 2
脱臭剤塗工量： 2. 05 g/m2  Deodorant coating amount: 2. 05 g / m2
撥水材塗工量： 2. 05 g/m2  Water repellent coating amount: 2. 05 g / m2
撥水度 （J I S P 8 1 3 7) ： R 1 0  Water repellency (J I S P 8 1 3 7): R 1 0
ガ一レ一透気度： 3秒/ 1 0 Om L  Gas permeance: 3 seconds / 1 0 Om L
[0051] <実施例 6 > <Example 6>
実施例 1において、 天然ゼォライ 卜からなる脱臭剤を次の銀担持ゼォライ 卜からなる脱臭剤に変更した以外は同様にして本発明の通気性耐水シートを 得た。  A breathable water-resistant sheet according to the present invention was obtained in the same manner as in Example 1 except that the deodorizer composed of natural zeolite was changed to the following deodorizer composed of silver-supported zeolite.
(株式会社シナネンゼォミック社製 商品名 ：ゼォミック HW1 O N)  (Product name: Zemic HW1 ON, manufactured by Sinanen Zemic Co., Ltd.)
物質名 ：銀担持ゼォライ ト  Material name: Silver supported zeolite
構造式： A g 20 - A l 203 - x S i 02 - y H20 x = 2 y = 0〜Structural formula: A g 2 0-A l 2 0 3 -x S i 0 2 -y H 2 0 x = 2 y = 0 ~
1 1
粒径： 0. 6〜 2. 5 U m  Particle size: 0.6-2.5 U m
見掛け密度： 0. 4  Apparent density: 0.4
真比重： 2. 1  True specific gravity: 2.1
細孔径： 3〜 1 0 A  Pore diameter: 3 to 10 A
B E T比表面積： 600m2/ g以上 BET specific surface area: 600m 2 / g or more
比熱： 0. 2 6 C a I / g p H : 7〜9 (J I S-K- 1 474) Specific heat: 0.2 6 C a I / g pH: 7 to 9 (JI SK-1 474)
[0052] 上記通気性耐水シ一卜の物性を測定した結果を以下に示す。 [0052] The results of measuring the physical properties of the breathable water-resistant sheet are shown below.
S MS不織布目付量： 1 5 g/m2 S MS non-woven fabric weight: 15 g / m 2
M F C塗工量： 5 g/m2 MFC coating amount: 5 g / m 2
脱臭剤塗工量： 2. 0 g/m2  Deodorant coating amount: 2.0 g / m2
撥水材塗工量： 2. 0 g/m2  Water repellent coating amount: 2.0 g / m2
撥水度 （J I S P 8 1 37) ： R 1 0  Water repellency (J I S P 8 1 37): R 1 0
ガ一レ一透気度： 2秒/ 1 0 Om L  Gas per one air permeability: 2 seconds / 1 0 Om L
[0053] <実施例 7 > <Example 7>
実施例 1において、 天然ゼォライ 卜からなる脱臭剤を次の合成ゼォライ ト からなる脱臭剤に変更した以外は同様にして本発明の通気性耐水シートを得 た。  A breathable water-resistant sheet of the present invention was obtained in the same manner as in Example 1 except that the deodorizer composed of natural zeolite was changed to the deodorizer composed of the following synthetic zeolite.
(旭硝子株式会社製 商品名 ：ゼォライ ト）  (Asahi Glass Co., Ltd. product name: Zeolite)
物質名 ：ゼォライ ト  Substance name: Zeolite
構造式： N a 02 ■ A I 203■ 2 S i 02 - n H 20 Structural formula: N a 0 2 ■ AI 2 0 3 ■ 2 S i 0 2 -n H 2 0
粒径： 3. 0 Um  Particle size: 3.0 Um
見掛け密度： 0. 36  Apparent density: 0.36
強熱減量： 1 8. 5% (800°C)  Loss on ignition: 18.5% (800 ° C)
p H ： 1 1. 8 (J I S-K- 1 474)  pH: 1 1. 8 (J I S-K-1 474)
[0054] 上記通気性耐水シ一卜の物性を測定した結果を以下に示す。 [0054] The results of measuring the physical properties of the breathable water-resistant sheet are shown below.
S MS不織布目付量： 1 5 g/m2 S MS non-woven fabric weight: 15 g / m 2
M F C塗工量： 5 g/m2 MFC coating amount: 5 g / m 2
脱臭剤塗工量： 2. 1 g/m2 Deodorant coating amount: 2.1 g / m 2
撥水材塗工量： 2. 1 g/m2 Water repellent coating amount: 2.1 g / m 2
撥水度 （J I S P 8 1 37) ： R 1 0  Water repellency (J I S P 8 1 37): R 1 0
ガ一レ一透気度： 2秒/ 1 0 Om L  Gas per one air permeability: 2 seconds / 1 0 Om L
[0055] <実施例 8> <Example 8>
実施例 1において、 天然ゼォライ 卜からなる脱臭剤を次の金属酸化物から なる脱臭剤に変更し、 次の製造条件に変更した以外は同様にして本発明の通 気性耐水シートを得た。 本実施例では脱臭剤に低濃度のサスペンションを用 いているため、 脱臭剤と撥水材の混合塗料の全固形分濃度を実施例 1の 40 重量％から 35重量％に変更し、 塗工量を合わせるためバーの線径を 0. 1 5mm力、ら 0. 2 Ommに変更した。 In Example 1, the deodorizer composed of natural zeolite was obtained from the following metal oxide. The breathable water-resistant sheet of the present invention was obtained in the same manner except that the deodorizer was changed to the following production conditions. In this example, a low-concentration suspension is used as the deodorant. Therefore, the total solid content of the mixed paint of the deodorant and water repellent material was changed from 40% in Example 1 to 35% by weight. The bar diameter was changed to 0.15 mm force, and 0.2 Omm.
(大和化学株式会社製 商品名 ：ザォバタック P S G)  (Product name: Daiwa Chemical Co., Ltd .: Zobatak P S G)
物質名 ：金属酸化物系脱臭剤  Substance name: Metal oxide deodorant
外観：乳白色サスペンション  Appearance: Milky white suspension
固形分濃度： 30重量％  Solid content concentration: 30% by weight
イオン性： ァニオン  Ionicity: Anyon
安全性：急性経口毒性 LD50 : 20, O O Omg/k g以上 皮膚刺激性 日本産業皮膚衛生協会 合格  Safety: Acute oral toxicity LD50: 20, O O Omg / kg or more Skin irritation Passed by Japan Industrial Skin Hygiene Association
[0056] 上記通気性耐水シ一卜の物性を測定した結果を以下に示す。 [0056] The measurement results of the physical properties of the breathable water-resistant sheet are shown below.
S MS不織布目付量： 1 5 g/m2 S MS non-woven fabric weight: 15 g / m 2
M F C塗工量： 5 g/m2 MFC coating amount: 5 g / m 2
脱臭剤塗工量： 2. 05 g/m2 Deodorant coating amount: 2. 05 g / m 2
撥水材塗工量： 2. 05 g/m2 Water repellent coating amount: 2. 05 g / m 2
撥水度 （J I S P 81 37) ： R 1 0  Water repellency (J I S P 81 37): R 1 0
ガ一レ一透気度： 3秒/ 1 0 Om L  Gas permeance: 3 seconds / 1 0 Om L
[0057] <実施例 9> <Example 9>
実施例 9においては、 脱臭剤と撥水材を実施例 1 と同様のものを用い、 脱 臭剤と撥水材の混合比とバーの線径を下記表 1の通り変更し、 且つ撥水材塗 ェ量を 2 gに固定して脱臭剤塗工量を実施例 1の約 2倍量に増量した以外は 実施例 1 と同様にして本発明の通気性耐水シートを作製した。  In Example 9, the same deodorant and water repellent material as in Example 1 were used, the mixing ratio of the deodorant and water repellent material and the bar wire diameter were changed as shown in Table 1 below. A breathable water-resistant sheet of the present invention was prepared in the same manner as in Example 1 except that the material coating amount was fixed at 2 g and the deodorant coating amount was increased to about twice that of Example 1.
[0058] <実施例 1 0> <Example 1 0>
実施例 1 0においては、 脱臭剤と撥水材を実施例 1 と同様のものを用い、 脱臭剤と撥水材の混合比とバーの線径を下記表 1の通り変更し、 且つ撥水材 塗工量を 2 gに固定して脱臭剤塗工量を実施例 1の約 3倍量に増量した以外 は実施例 1 と同様にして本発明の通気性耐水シートを作製した。 In Example 10, the same deodorant and water repellent material as in Example 1 were used, the mixing ratio of the deodorant and water repellent material and the bar wire diameter were changed as shown in Table 1 below. Except for fixing the coating amount to 2 g and increasing the coating amount of deodorant to about 3 times the amount of Example 1. Produced a breathable water-resistant sheet of the present invention in the same manner as in Example 1.
[0059] <実施例 1 1 >  <Example 1 1>
実施例 1において、 撥水材を構成するォレフイン系撥水剤をパラフィン系 撥水剤 （明成化学工業株式会社製 商品名 ：ペトロックス P 200) に変更 した以外は同様にして本発明の通気性耐水シートを得た。  The breathable water resistance of the present invention was the same as in Example 1 except that the olefin water repellent constituting the water repellent material was changed to a paraffin water repellent (trade name: Petrox P 200, manufactured by Meisei Chemical Co., Ltd.). A sheet was obtained.
(明成化学工業株式会社製 商品名 ：ペトロックス P 200)  (Brand name: Petrox P 200, manufactured by Meisei Chemical Co., Ltd.)
成分： ワックス系ェマルジヨン  Ingredients: Wax emerald
外観： 白色液体  Appearance: White liquid
p H ： 8. 5  pH: 8.5
イオン性： ノニオン  Ionicity: Nonion
固形分濃度： 34重量％  Solid content: 34% by weight
[0060] 上記通気性耐水シ一卜の物性を測定した結果を以下に示す。 [0060] The results of measuring the physical properties of the breathable water-resistant sheet are shown below.
S MS不織布目付量： 1 5 g/m2 S MS non-woven fabric weight: 15 g / m 2
M F C塗工量： 5 g/m2 MFC coating amount: 5 g / m 2
脱臭剤塗工量： 2. 05 g/m2 Deodorant coating amount: 2. 05 g / m 2
撥水材塗工量： 2. 05 g/m2 Water repellent coating amount: 2. 05 g / m 2
撥水度 （J I S P 81 37) ： R 1 0  Water repellency (J I S P 81 37): R 1 0
ガ一レ一透気度： 3秒/ 1 0 Om L  Gas permeance: 3 seconds / 1 0 Om L
[0061] <実施例 1 2> [0061] <Example 1 2>
実施例 1において、 撥水材を構成するォレフイン系撥水剤をパラフィン系 撥水剤 （青木油脂工業株式会社製 商品名 ： EP— 1 ) に変更した以外は同 様にして本発明の通気性耐水シートを得た。  The air permeability of the present invention was similarly changed in Example 1 except that the olefin-based water repellent constituting the water repellent material was changed to a paraffinic water repellent (trade name: EP-1) manufactured by Aoki Oil & Fat Co., Ltd. A water resistant sheet was obtained.
(青木油脂工業株式会社製 商品名 ： E P _ 1 )  (Product name: E P _ 1, manufactured by Aoki Oil & Fat Co., Ltd.)
成分：パラフィンワックス系ェマルジヨン  Ingredients: Paraffin wax emerald
外観：淡黄白色ェマルジヨン  Appearance: Light yellowish white emerald
p H ： 9. 0  pH: 9.0
イオン性： ァニオン  Ionicity: Anyon
固形分濃度： 30重量％ [0062] 上記通気性耐水シ一卜の物性を測定した結果を以下に示す。 Solid content concentration: 30% by weight [0062] The results of measuring the physical properties of the breathable water-resistant sheet are shown below.
S MS不織布目付量： 1 5 g/m2 S MS non-woven fabric weight: 15 g / m 2
M F C塗工量： 5 g/m2 MFC coating amount: 5 g / m 2
脱臭剤塗工量： 2. 05 g/m2  Deodorant coating amount: 2. 05 g / m2
撥水材塗工量： 2. 05 g/m2  Water repellent coating amount: 2. 05 g / m2
撥水度 （J I S P 81 37) ： R 1 0  Water repellency (J I S P 81 37): R 1 0
ガ一レ一透気度： 3秒/ 1 0 Om L  Gas permeance: 3 seconds / 1 0 Om L
[0063] 上記実施例 9及び実施例 1 0で作製した通気性耐水シ一卜の塗工データと 物性を以下の表 1に示す。 なお、 表 1には実施例 1の塗工データと物性を併 記した。 [0063] Table 1 below shows coating data and physical properties of the breathable water-resistant sheet prepared in Example 9 and Example 10. In Table 1, the coating data and physical properties of Example 1 are shown.
[0064] [表 1] [0064] [Table 1]
Figure imgf000024_0001
Figure imgf000024_0001
[0065] [比較例 1 ]  [0065] [Comparative Example 1]
実施例 1で得られた複合シ一ト材そのものを比較用のシートとした。 この シ一トはカレンダ一掛けはしておらず、 撥水材及び脱臭剤も塗工されていな い。  The composite sheet material obtained in Example 1 was used as a comparative sheet. This sheet is not calendered, and water repellent and deodorant are not applied.
[0066] [比較例 2 ]  [0066] [Comparative Example 2]
実施例 1において、 脱臭剤を使用しない下記の撥水材のみの塗料を用い、 下記の方法で複合シ一ト材に塗工した以外は同様にして比較用のシートを得 た。 In Example 1, a sheet for comparison was obtained in the same manner except that the coating material using only the following water repellent material without using a deodorant was applied to the composite sheet material by the following method. It was.
<撥水材塗料の作製 >  <Production of water repellent paint>
ォレフィン系撥水剤 （明成化学工業株式会社製 商品名 ：ペトロックス P 300) 50重量部およびスチレンブタジエン樹脂 （日本 A &L株式会社製 商品名 ：スマ一テックス P A 3802) 48重量部を順次撹拌しながら混 合して主剤を作製した後、 塗工する直前に炭酸ジルコニウム系架橋剤 （日本 軽金属株式会社製 商品名 ：ペイコート 20) 2重量部を撹拌しながら添加 し水を加えて全固形分 40重量％の塗料を作製した。 このとき、 塗料の粘度 は 95m P a ■ Sであり、 ザ一ンカップ法で 1 7秒であった。  Olefin-based water repellent (Madesei Chemical Co., Ltd., trade name: Petrox P 300) 50 parts by weight and styrene butadiene resin (Japan A & L Co., Ltd., trade name: Smarttex PA 3802) After mixing to prepare the main agent, just before coating, zirconium carbonate-based crosslinking agent (Nippon Light Metal Co., Ltd., product name: Paycoat 20) Add 2 parts by weight with stirring, add water, and add 40% total solids % Paint was made. At this time, the viscosity of the paint was 95 mPas and was 17 seconds by the Zainkup method.
[0067] <撥水材塗料の塗工によるシ一卜の作製 > [0067] <Preparation of a sheet by applying water repellent paint>
実施例 1で得た複合シ一ト材の微細繊維状セルロース側の面に上記の撥水 材塗料をフレキソコ一ターで次の条件により塗工した。 このときの塗工量は 2. 3 g/m2であった。 The above-mentioned water repellent paint was applied to the surface of the composite sheet material obtained in Example 1 on the fine fibrous cellulose side with a flexo coater under the following conditions. The coating amount at this time was 2.3 g / m 2 .
使用ァニロックスロール： 1 30線  Use anilox roll: 1 30 lines
塗工速度： 1 0 Om/分  Coating speed: 10 Om / min
エアドライヤー乾燥温度： 1 00°C  Air dryer drying temperature: 1 00 ° C
塗工後、 力レンダ一掛け （力レンダ一掛け線圧： 1 00 k g/cm) を行 つた後に乾燥機に 1 20°Cで 30分間処理することによりシ一トを作製した  After coating, a sheet was prepared by applying a force render (force render line pressure: 100 kg / cm) and then treating the dryer at 120 ° C for 30 minutes.
[0068] [比較例 3 ] [0068] [Comparative Example 3]
市販されているォムッ （ュニチャーム株式会社製 商品名 ：ム _ニ_おし りピュア） に使用された C a C03を添加した通気性フィルムからなるバック シートを比較用のシートとした。 A back sheet made of a breathable film to which C a C0 3 was added, which was used in the commercially available omutsu (trade name: Mu_Ni_Oshiri Pure), was used as a comparative sheet.
[0069] [比較例 4] [0069] [Comparative Example 4]
実施例 1において、 脱臭剤を使用しない下記の撥水材のみの塗料を用いた 以外は同様にして、 耐水性を比較するためのシートを得た。  A sheet for comparison of water resistance was obtained in the same manner as in Example 1, except that the following water-repellent material-only paint without using a deodorant was used.
<撥水材塗料 >  <Water repellent paint>
全固形分 30重量％のパラフィン系撥水剤 （青木油脂工業株式会社製 商 品名 ： PA_ 1 ) からなる合成樹脂系バインダーを含まない撥水材を使用し た。 ここで用いたパラフィン系撥水剤の性質は下記の通りである。 なお、 複 合シート材への塗工量は 2. O g/m2であった。 Paraffinic water repellent with a total solid content of 30% by weight (manufactured by Aoki Oil & Fat Co., Ltd. Product name: A water repellent material made of PA_1) that does not contain a synthetic resin binder was used. The properties of the paraffinic water repellent used here are as follows. The coating amount on the composite sheet was 2. O g / m 2 .
(青木油脂工業株式会社製 商品名 ： P A_ 1 )  (Product name: P A_ 1, manufactured by Aoki Oil & Fat Co., Ltd.)
成分：パラフィンワックス系撥水剤にメラミン樹脂を共存させたもの 外観：淡黄白色ェマルジヨン  Ingredient: Paraffin wax water repellent coexisting with melamine resin Appearance: Pale yellowish white emulsion
イオン性： ァニオン  Ionicity: Anyon
p H ： 9. 0  pH: 9.0
固形分濃度： 30%  Solid content: 30%
[0070] [比較例 5] [0070] [Comparative Example 5]
比較例 4において、 撥水材塗工量が 5. 0 g/m2であった以外は同様にし て耐水性を比較するためのシートを得た。 A sheet for comparing water resistance was obtained in the same manner as in Comparative Example 4 except that the coating amount of the water repellent material was 5.0 g / m 2 .
[0071] [比較例 6] [0071] [Comparative Example 6]
実施例 1において、 脱臭剤を使用しない下記の撥水材のみの塗料を用いた 以外は同様にして、 耐水性を比較するためのシートを得た。  A sheet for comparison of water resistance was obtained in the same manner as in Example 1, except that the following water-repellent material-only paint without using a deodorant was used.
<撥水材塗料 >  <Water repellent paint>
メチルハイ ドロジェンシリコーンオイル （東芝シリコーン社製 商品名 ： T S F 484) を N—へキサンで希釈して得た 1 0 w/v%メチルハイ ドロ ジェンシリコーンオイルからなる合成樹脂系バインダー及び架橋剤を含まな い撥水材を使用した。 なお、 複合シート材への塗工量は 2. O g/m2であつ た。 It does not contain a synthetic resin-based binder and a cross-linking agent made from 10 w / v% methyl hydrogen silicone oil obtained by diluting methyl hydrogen silicone oil (trade name: TSF 484, manufactured by Toshiba Silicone Co., Ltd.) with N-hexane. A water repellent material was used. The coating amount on the composite sheet material was 2. O g / m 2 .
[0072] [比較例 7 ]  [0072] [Comparative Example 7]
比較例 6において、 撥水材塗工量が 5. 0 g/m2であった以外は同様にし て、 耐水性を比較するためのシートを得た。 A sheet for comparing water resistance was obtained in the same manner as in Comparative Example 6 except that the coating amount of the water repellent material was 5.0 g / m 2 .
[0073] 次に前記実施例 1〜 1 2及び比較例 1〜 3で得られたシ一トについて次の 評価を行った。 Next, the following evaluation was performed on the sheets obtained in Examples 1 to 12 and Comparative Examples 1 to 3.
〔力レンダ一処理前後の透気度と平滑度〕  [Air permeability and smoothness before and after force rendering]
製造過程において力レンダ一処理を行っている実施例 1〜 1 2及び比較例 2のシートにおいて、 力レンダ一処理前後における透気度と平滑度をガ一レ —デンソメータ一 （J I S P 8 1 1 7 ) とベック平滑度試験機 （J I S P 8 1 1 9 ) を用いて測定し、 その結果を表 2に示した。 なお、 比較例 1及び比較例 3については、 上記と同様にして透気度と平滑度を測定して表 2に力レンダ一処理前として示した。 Examples 1-2 and comparative example in which force-rendering is performed in the manufacturing process Measure the air permeability and smoothness before and after the force-rendering process on sheet 2 using a densometer (JISP 8 1 1 7) and a Beck smoothness tester (JISP 8 1 1 9). The results are shown in Table 2. In Comparative Example 1 and Comparative Example 3, the air permeability and smoothness were measured in the same manner as described above, and are shown in Table 2 as before force rendering treatment.
表 2の結果から明らかなように、 本発明による通気性耐水シート （実施例 "！〜 1 2 ) についてはカレンダ一処理により平滑度が高くなることにより印 刷適正が向上し、 通気性と相関のある透気度も向上することが確認された。  As is clear from the results in Table 2, the air permeability of the water-resistant sheet according to the present invention (Examples “! To 1 2”) is improved in the printability due to the smoothness being increased by the calendaring process, and is correlated with the air permeability. It was confirmed that the air permeability with increased.
[表 2] [Table 2]
Figure imgf000027_0001
Figure imgf000027_0001
〔耐水性〕 〔water resistant〕
実施例 1〜 1 2及び比較例 1〜 7で得られたシ一卜の耐水性を次の方法に より確認した。 すなわち、 シートを濾紙の上に水を十分に含ませたワイパー 紙 （株式会社クレシァ製 商品名 ：キムタオル） 1 0枚を重ねて置き、 更に 5 k gの重石を乗せて時間を追って濾紙に漏れた水を観察する方法を採った [0076] 上記耐水性試験の結果、 実施例 1〜 1 2及び比較例 2〜 3では 5時間後ま で濾紙への漏れはなく、 耐水性が極めて良好であった。 一方、 比較例 1では 、 試験開始後 1分経過後に水漏れが起こり、 ほとんど耐水性を有していなか つた。 また、 比較例 4では試験開始後 1 0分後に水漏れが認められ、 実施例 に比べると耐水性が不十分であった。 比較例 5では試験開始後 1分経過後に おいて全く水漏れが認められなかったものの、 試験開始後 2 0分後には水漏 れが認められ、 実施例に比べると耐水性が不十分であった。 比較例 6では試 験開始後 5分後に水漏れが起こり、 実施例に比べると耐水性が不十分であつ た。 また、 比較例 7では試験開始後 1分後において全く水漏れが認められな かったものの、 試験開始後 1 5分後に水漏れが起こり、 実施例に比べると耐 水性が不十分であった。 上記耐水性試験の条件は、 市販の子ども用おむつの バックシ一卜の実使用条件よりも過酷な条件であるので、 本発明による通気 性耐水シ _ト （実施例 1〜 1 2 ) を市販の子ども用おむつのバックシートに 用いても長時間漏れの恐れはなく、 実使用に十分耐えられるものである。 The water resistance of the sieves obtained in Examples 1 and 12 and Comparative Examples 1 to 7 was confirmed by the following method. That is, wiper paper (product name: Kim Towel, manufactured by Crecia Co., Ltd.) with enough water on the filter paper, placed on top of it, and then 5 kg of weight was placed on it and leaked to the filter paper over time. I took a way to observe the water [0076] As a result of the water resistance test, in Examples 1 to 12 and Comparative Examples 2 to 3, there was no leakage to the filter paper until 5 hours later, and the water resistance was extremely good. On the other hand, in Comparative Example 1, water leakage occurred 1 minute after the start of the test, and almost no water resistance was obtained. In Comparative Example 4, water leakage was observed 10 minutes after the start of the test, and the water resistance was insufficient compared to the Example. In Comparative Example 5, no water leakage was observed 1 minute after the start of the test, but water leakage was observed 20 minutes after the start of the test, and the water resistance was insufficient compared to the Examples. It was. In Comparative Example 6, water leakage occurred 5 minutes after the start of the test, and the water resistance was insufficient compared to the Example. In Comparative Example 7, no water leak was observed 1 minute after the start of the test, but a water leak occurred 15 minutes after the start of the test, and the water resistance was insufficient compared to the Example. The conditions of the above water resistance test are more severe than the actual usage conditions of a commercially available diaper for a baby diaper. Therefore, the breathable water resistant sheet according to the present invention (Examples 1 to 12) was not commercially available. Even if used as a backsheet for children's diapers, there is no risk of leakage for a long time, and it can withstand actual use.
[0077] 〔アンモニアによる脱臭性能〕  [0077] [Deodorization performance with ammonia]
アンモニアによる脱臭性能は、 図 7の器具を用いて次の手順により評価し た。 次の （ 1 ) の試料として実施例 1〜 1 2及び比較例 1〜 3のシートを使 用した。  The deodorization performance with ammonia was evaluated by the following procedure using the equipment shown in Fig. 7. The sheets of Examples 1 to 12 and Comparative Examples 1 to 3 were used as samples for the next (1).
( 1 ) 温度 2 3度、 湿度 5 0 % R Hの環境下に 1 . 8 Lの密閉ガラス瓶の底 に試料 （サイズ： 5 0 X 5 0 m m) をセットする。  (1) Place a sample (size: 50 x 50 mm) on the bottom of a 1.8 L sealed glass bottle in an environment of temperature 23 degrees and humidity 50% RH.
( 2 ) 次にアンモニアを密閉容器内の濃度が 1 0 0 p p mになるようにガラ ス繊維濾紙に注入する。  (2) Next, inject ammonia into the glass fiber filter so that the concentration in the sealed container is 100 ppm.
( 3 ) アンモニア注入後、 1 0分後、 2 0分後、 4 0分後、 6 0分後、 8 0 分後、 1 0 0分後、 1 2 0分後における残存アンモニアガス濃度をガラス管 入り口よりコックを開いて、 アンモニア検知管を接続したガス検知器を用い て定量した。  (3) After ammonia injection, the residual ammonia gas concentration at 10 minutes, 20 minutes, 40 minutes, 60 minutes, 60 minutes, 80 minutes, 100 minutes, 120 minutes after glass injection The cock was opened from the inlet of the tube and quantified using a gas detector connected to an ammonia detector tube.
上記評価結果を表 3に示した。 [0078] [表 3] The evaluation results are shown in Table 3. [0078] [Table 3]
Figure imgf000029_0001
Figure imgf000029_0001
[0079] 上記表 3から明らかなように、 脱臭剤を用いた本発明による通気性耐水シ ート （実施例 1〜 1 0) は、 脱臭剤を用いていない比較例 1、 比較例 2に比 ベ、 時間を追うごとにアンモニア濃度が低下しており、 アンモニアの脱臭効 果が確認された。 比較例 3に関しては微多孔質フィルムに添加されている炭 酸カルシウムが十分ではないが脱臭機能を持っため、 比較例のなかでは緩慢 ではあるがアンモニア濃度が低下している。  [0079] As is apparent from Table 3 above, the breathable water-resistant sheets (Examples 1 to 10) according to the present invention using a deodorant are shown in Comparative Example 1 and Comparative Example 2 that do not use a deodorant. In comparison, the ammonia concentration decreased with time, and the deodorizing effect of ammonia was confirmed. Regarding Comparative Example 3, although the calcium carbonate added to the microporous film is not sufficient, it has a deodorizing function, so the ammonia concentration is low in the comparative example, although it is slow.
[0080] 〔アンモニアによる防臭性能〕  [0080] [Deodorization performance by ammonia]
アンモニアによる防臭性能は、 図 8の器具を用いて次の手順により評価し た。 次の （ 2 ) の試料として実施例 1〜 3及び比較例 3のシートを使用した  Deodorization performance with ammonia was evaluated by the following procedure using the equipment shown in Fig. 8. The sheets of Examples 1 to 3 and Comparative Example 3 were used as the next (2) sample.
( 1 ) 下底直径 60 mm、 上面直径 90 mm、 高さ 1 25 mmのポリプロピ レン製カップ （容量約 500m L) を 2個用意する。 (1) Prepare two polypropylene cups (capacity: 500ml) with a bottom diameter of 60mm, top diameter of 90mm, and height of 1.25mm.
(2) 次に上記力ップ 2個に 250 p pmのアンモニア水 5 Om Lをいれ、 図 8の （a) のようにカップの入口 （上面） を試料 （シート） で被覆する。 ( 3 ) 上記アンモニア水が入ったサンプル装着カップ 2個を図 8の （b ) の ように 0 . 0 1 5 m 3の立方体型のアクリル樹脂ボックスからなるアンモニア ガス飽和室中に密閉状態で配置した後、 カップ内のアンモニアが漏出■発生 してくるアンモニアの濃度を検知管を用いて定量し経時的に記録した。 (2) Next, add 250 ppm of 5 Om L of ammonia water to the two force cups, and cover the inlet (upper surface) of the cup with the sample (sheet) as shown in Fig. 8 (a). (3) 0.0 arranged in a closed state during 1 5 m ammonia gas saturated chamber consisting of 3 cubic acrylic resin box as two sample mounting cup which the ammonia water has entered shown in FIG. 8 (b) After that, the ammonia concentration in the cup leaked out and the concentration of ammonia generated was quantified using a detector tube and recorded over time.
その結果を表 4に示した。  The results are shown in Table 4.
[0081 ] [表 4] [0081] [Table 4]
Figure imgf000030_0001
Figure imgf000030_0001
[0082] 上記表 4から明らかなように、 脱臭剤塗工量が多いシ一トほど漏出してく るアンモニア量が少ないことが確認された。 漏出アンモニア量は通気性が低 い比較例 3のフィルムと比較しても大幅に少ないことがわかる。  [0082] As is apparent from Table 4 above, it was confirmed that the amount of ammonia leaking out was smaller as the sheet with a larger amount of deodorant was applied. It can be seen that the amount of leaked ammonia is significantly smaller than that of the film of Comparative Example 3 which has low air permeability.
[0083] <実施例 1 3 >  [0083] <Example 1 3>
実施例 1で得られた通気性耐水シ一卜が子ども用おむつのバックシ一ト部 分に適用できることを実証した例について述べる。 おむつは市販のおむつの バックシ一ト部分を本発明の通気性耐水シ一卜に置きかえたものを、 実際に 乳幼児に着用させる実着用試験を実施した。 評価としては、 実際に着用して 所定の時間経過後の、 尿漏れや皮膚のむれやかぶれの発現を観察することと した。  An example demonstrating that the breathable water-resistant sheet obtained in Example 1 can be applied to the backsheet part of a children's diaper will be described. As for the diaper, an actual wearing test was carried out in which an infant is actually put on a product in which the backsheet portion of a commercially available diaper is replaced with the breathable water-resistant sheet of the present invention. As an evaluation, we decided to observe the appearance of urine leakage, skin irritation and rash after wearing and wearing for a predetermined time.
[0084] <試験用おむつの作製 >  [0084] <Preparation of test diaper>
図 5及び図 6に示した構成の子ども用おむつ （商品名 ： 「ム一二一のび一 るフィット」 ュニチャーム社製） のバックシート側から、 バックシート （通 気性フィルムと不織布のラミネ一ト） 全体を接合部にコールドスプレーを吹 き付けながら注意して取り除き、 改めて本発明による通気性耐水シ一卜に置 き換えた試験用の子ども用おむつ 4 0枚を作成した。  From the back sheet side of the children's diaper (Product name: “Muinen no Ibi Fit” made by unicharm) with the structure shown in FIGS. 5 and 6, the back sheet (laminate of breathable film and non-woven fabric) The whole was carefully removed while spraying cold spray on the joint, and 40 diapers for testing were replaced with a breathable water-resistant sheet according to the present invention.
[0085] <乳幼児による実着用試験 > 上記試験用おむつを 4 0枚用意して、 正常な排尿機構をもつ 8人の乳幼児 (男児 4名、 女児 4名） に着用させた （1人当り 5枚づっ使用） 。 着用者の 保護者には使用状態を示す記録を依頼すると共に使用後のおむつは全て回収 しバックシートからの漏れを確認した。 装着時間は平均で 3時間とした。 そ の結果、 4 0枚中の 3 7枚についてはバックシ一卜からの漏れが生じておら ず、 この 3 7枚中の 3枚については後ろの部分に円形のにじみ出しが発生し 、 2枚についてはピンホール状のにじみ出しが発生していた。 4 0枚中の残 りの 3枚については便漏れが 1枚、 尿漏れが 2枚発生していた。 また、 全て の乳幼児について着用中にムレやカブレなどが生じることはなかった。 これ らの結果から、 本発明の通気性耐水シートをバックシ一卜に用いた子ども用 おむつは、 十分実用に供しえるものであることが確認された。 [0085] <Actual wearing test by infants> 40 diapers for the above test were prepared and worn by 8 infants (4 boys, 4 girls) with normal urination mechanism (use 5 diapers per person). The wearer's guardian was asked to record the state of use, and all diapers after use were collected and checked for leakage from the backsheet. The wearing time was 3 hours on average. As a result, 3 out of 40 sheets had no leakage from the back cover, and about 3 out of 37 sheets, circular bleeding occurred in the rear part, and 2 sheets About, pinhole-like bleeding occurred. The remaining 3 out of 40 sheets had 1 stool leak and 2 urine leaks. Also, there was no stuffiness or fogging while wearing on all infants. From these results, it was confirmed that the children's diaper using the breathable water-resistant sheet of the present invention as a back cover is sufficiently practical.

Claims

請求の範囲 The scope of the claims
[1] 不織布と微細繊維状セルロースからなる複合シ一ト材に撥水材と脱臭剤が 積層されてなる通気性耐水シートであって、 前記撥水材が下記の （a) 、 ( b) 及び （c) を含むことを特徴とする通気性耐水シート。  [1] A breathable water-resistant sheet in which a water-repellent material and a deodorant are laminated on a composite sheet material composed of a nonwoven fabric and fine fibrous cellulose, wherein the water-repellent material comprises the following (a) and (b) And (c) A breathable water-resistant sheet characterized by comprising:
(a) ォレフィン系撥水剤及びパラフィン系撥水剤から選ばれた少なくと も 1種  (a) At least one selected from olefin-based water repellent and paraffin-based water repellent
(b) 合成樹脂系バインダー  (b) Synthetic resin binder
(c) 架橋剤  (c) Crosslinker
[2] 前記不織布がスパンメルト不織布からなることを特徴とする請求項 1に記 載の通気性耐水シ一ト。  [2] The breathable water-resistant sheet according to claim 1, wherein the nonwoven fabric is a spun melt nonwoven fabric.
[3] 前記微細繊維状セルロースは、 0. 3 mm以下の平均繊維長を有し、 且つ [3] The fine fibrous cellulose has an average fiber length of 0.3 mm or less, and
1 5 m L/g以上の抱水度を有することを特徴とする請求項 1に記載の通気 性耐水シート。  The breathable water-resistant sheet according to claim 1, which has a water retention of 15 ml / g or more.
[4] 前記合成樹脂系バインダ一が、 スチレンブタジェン樹脂からなることを特 徵とする請求項 1に記載の通気性耐水シ一ト。  [4] The breathable water-resistant sheet according to claim 1, wherein the synthetic resin binder is made of styrene butadiene resin.
[5] 前記架橋剤が炭酸ジルコニウムアンモニゥムからなることを特徴とする請 求項 1に記載の通気性耐水シ一ト。 [5] The breathable water-resistant sheet according to claim 1, wherein the cross-linking agent is composed of ammonium zirconium carbonate.
[6] 前記脱臭剤が天然ゼォライ 卜からなることを特徴とする請求項 1に記載の 通気性耐水シート。 [6] The breathable water-resistant sheet according to [1], wherein the deodorizing agent is made of natural zeolite.
[7] 前記通気性耐水シ一卜が、 力レンダ一処理されたことを特徴とする請求項  [7] The breathable water-resistant sheet is subjected to force-rendering treatment.
1に記載の通気性耐水シ一ト。  The breathable water-resistant sheet according to 1.
[8] 請求項 1乃至 7のいずれかに記載の通気性耐水シートをバックシ一卜に用 いたことを特徴とする吸収体物品。 [8] An absorbent article, wherein the breathable water-resistant sheet according to any one of claims 1 to 7 is used on a back cover.
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