WO2012001822A1 - ティシュペーパー及びティシュペーパーの製造方法 - Google Patents
ティシュペーパー及びティシュペーパーの製造方法 Download PDFInfo
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- WO2012001822A1 WO2012001822A1 PCT/JP2010/063006 JP2010063006W WO2012001822A1 WO 2012001822 A1 WO2012001822 A1 WO 2012001822A1 JP 2010063006 W JP2010063006 W JP 2010063006W WO 2012001822 A1 WO2012001822 A1 WO 2012001822A1
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- tissue paper
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K10/00—Body-drying implements; Toilet paper; Holders therefor
- A47K10/16—Paper towels; Toilet paper; Holders therefor
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- 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
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B29/005—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard layer
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K10/00—Body-drying implements; Toilet paper; Holders therefor
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K10/00—Body-drying implements; Toilet paper; Holders therefor
- A47K10/16—Paper towels; Toilet paper; Holders therefor
- A47K10/18—Holders; Receptacles
- A47K10/20—Holders; Receptacles for piled sheets
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K10/00—Body-drying implements; Toilet paper; Holders therefor
- A47K10/24—Towel dispensers, e.g. for piled-up or folded textile towels; Toilet-paper dispensers; Dispensers for piled-up or folded textile towels provided or not with devices for taking-up soiled towels as far as not mechanically driven
- A47K10/32—Dispensers for paper towels or toilet-paper
- A47K10/42—Dispensers for paper towels or toilet-paper dispensing from a store of single sheets, e.g. stacked
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K7/00—Body washing or cleaning implements
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/84—Paper comprising more than one coating on both sides of the substrate
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/002—Tissue paper; Absorbent paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/002—Tissue paper; Absorbent paper
- D21H27/004—Tissue paper; Absorbent paper characterised by specific parameters
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/002—Tissue paper; Absorbent paper
- D21H27/004—Tissue paper; Absorbent paper characterised by specific parameters
- D21H27/005—Tissue paper; Absorbent paper characterised by specific parameters relating to physical or mechanical properties, e.g. tensile strength, stretch, softness
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/02—Patterned paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/26—All layers being made of paper or paperboard
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
Definitions
- the present invention relates to tissue paper and a method for manufacturing tissue paper.
- the tissue paper in the domestic market is broadly divided into non-moisturizing tissue and moisturizing tissue.
- the moisturizing tissue is a tissue produced by applying a moisturizing agent such as glycerin to a tissue base paper that has been made
- the non-humidifying tissue is a general tissue that does not apply a moisturizing agent to the tissue base paper.
- tissue paper is mainly for personal use, mainly for facial use
- the moisturizing tissue is considered to be a product specification specialized for use in the nose.
- tissue paper has been used for facial applications, mainly for nasal clasps, and so many attempts have been made in the past to improve the touch and quality improvements have been repeated.
- various softeners are added to the raw materials to improve the flexibility of the product.
- Many supple fibers with low fiber roughness are used. Fine creping by sticking when wet paper dryer is dried and adjusting per doctor.
- the softness and smoothness of the paper is achieved by technologies such as forming the surface, improving the surface properties by a calender, and adjusting the raw material beating rate to a low level while maintaining the lateral strength by adjusting the ratio of the web speed. Improvements have been made.
- non-moisturizing tissue has technical limitations and an increase in the number of people suffering from hay fever and allergic rhinitis has led to the development of moisturizing tissue that is now part of the tissue market.
- Heavy users such as allergic rhinitis and hay fever, bite their nose more than tens of times a day, and the nose and its surroundings are rubbed against tissue, causing mild inflammation and redness. Therefore, for such a user, a material having a small friction on the tissue surface, that is, a material having smoothness is preferably used.
- the moisturizing tissue applies an aqueous lotion solution containing a hygroscopic moisturizing agent such as glycerin to the base paper of the sanitary thin paper.
- a hygroscopic moisturizing agent such as glycerin
- Glycerin is less irritating to the skin as used in cosmetics, absorbs moisture and moistens and softens the tissue, forms a thin film on the surface of the tissue, and is clearly softer than ordinary non-applied tissue It is recognized as a differentiated product with a smooth touch.
- Patent Document 1 a technique for externally applying an oily substance and a humectant has been introduced.
- An object of the present invention is to provide a tissue paper that has a softness, smoothness, and moist feeling equal to or higher than those of conventional moisturizing tissue paper, and has reduced stickiness and tearability during use. .
- the present invention that has solved the above problems is as follows.
- ⁇ Invention of Claim 1> A two-ply tissue paper with a chemical applied on its surface, The drug content is 2.0 to 5.5 g / m 2 on both sides, and the basis weight per layer of the sheet constituting 2 plies is 10 to 25 g / m 2 .
- 2-ply paper thickness is 100-140 ⁇ m, Tissue paper characterized by that.
- tissue paper according to claim 1 wherein the chemical solution has a water content of 1 to 15% by weight.
- tissue paper according to claim 1 having a moisture content of 10.0 to 13.0%.
- tissue paper according to claim 1 wherein the surface has a coefficient of static friction of 0.50 to 0.65.
- tissue paper according to claim 1 wherein the dry tensile strength in the CD direction of the two plies is 80 to 120 cN / 25 mm, and the wet tensile strength in the CD direction of the two plies is 33 to 60 cN / 25 mm.
- a method for producing a two-ply tissue paper having a chemical applied to the surface The chemical solution is applied so that the drug content is 2.0 to 5.5 g / m 2 on both sides,
- the basis weight per layer of the sheet constituting the two plies of the tissue paper is 10 to 25 g / m 2 ,
- the two-ply paper thickness is 100-140 ⁇ m.
- the crepe structure of the sheet is extended, and the tissue paper having a smooth surface is formed. Further, since the paper thickness is reduced and the fiber density is increased due to the elongation, the strength between fibers is increased, and a tissue paper having a high tensile strength in the CD direction, particularly a high wet tensile strength can be obtained. Whereas conventional moisturizing tissue applies a lotion solution to a thick base paper to create a film on the surface of the tissue to give the user smoothness, the present invention suppresses the thickness and the amount of solution applied, and provides a crepe structure.
- the surface is made smooth by stretching, thereby providing a smoothness higher than that of a conventional moisturizing tissue.
- the sticky feeling is reduced as a minimum amount of the lotion solution film on the tissue surface to make it feel smooth. Therefore, the drug content in the dry state is lower than that of conventional lotion type tissue paper, and it contains a sufficient amount of drug to exert its effect even though it does not easily cause stickiness when used. Therefore, it has enough moist and moisturizing properties.
- the paper thickness is thin, it has a soft feeling in use as compared with the drug content.
- the present invention provides a tissue paper that has a soft and smooth texture equal to or higher than that of a conventional moisturizing tissue, is less sticky than the conventional moisturizing tissue, and has a high tensile strength in the CD direction. It is.
- tissue paper It is a principal part expansion perspective view which shows how to fold a secondary continuous sheet (tissue paper). It is a principal part expansion perspective view which shows how to fold a secondary continuous sheet (tissue paper). It is a figure which shows a mode that the (a) tissue paper bundle
- the “drug content” in the present invention indicates the content of the drug component in a dry state (absolutely dry) contained in the unit area of tissue paper in the standard state of JIS P 8111.
- the content of components other than water in the chemical solution is shown.
- the base paper of the tissue paper according to the present invention has a ply structure in which two thin papers (hereinafter also referred to as sheets) are laminated.
- the raw pulp of the thin paper (sheet) constituting the tissue paper according to the present invention for example, mechanical pulp such as ground wood pulp (GP), pressure-rise ground wood pulp (PGW), thermomechanical pulp (TMP), etc. : Semi-chemical pulp (CP), softwood high yield unbleached kraft pulp (HNKP), softwood bleached kraft pulp (NBKP), hardwood unbleached kraft pulp (HNKP), hardwood unbleached kraft pulp (LUKP), hardwood bleached kraft pulp ( Chemical pulp such as LBKP): Waste paper pulp such as deinked pulp (DIP) and waste pulp (WP).
- the raw material pulp can be used by selecting one kind or two or more kinds.
- a chemical pulp containing no filler or foreign matter is preferred.
- the raw material pulp may contain woody materials such as straw pulp, bamboo pulp, kenaf pulp, and herbs.
- the raw material pulp is preferably a blend of NBKP and LBKP.
- Waste paper pulp may be blended as appropriate, but it is preferably composed of only NBKP and LBKP in terms of texture and the like.
- NBKP: LBKP 30: 70 to 60:40 is desirable.
- other fiber raw materials include polyester fibers such as polyethylene terephthalate, polybutylene terephthalate, and copolymers thereof, polyolefin fibers such as polyethylene, polypropylene, and polystyrene, acrylics such as polyacrylonitrile, modacrylic, and the like.
- Fiber polyamide fiber such as nylon 6, nylon 66, nylon 12, etc.
- synthetic fiber such as polyvinyl alcohol fiber, polyvinylidene chloride fiber, polyvinyl chloride fiber, urethane fiber, semi-synthetic fiber such as triacetate fiber, diacetate fiber
- chemical fibers such as regenerated fiber spun from regenerated cellulose fiber such as coarse rayon, copper ammonia rayon, polynosic rayon, lyocell, collagen, alginic acid, chitin, etc. Rukoto can.
- the polymer constituting the chemical fiber may be in the form of a homopolymer, a modified polymer, a blend, a copolymer or the like.
- Raw materials such as pulp fiber are used as a base paper through, for example, a known papermaking process, specifically, a wire part, a press part, a dryer part, a size press, a calendar part, and the like.
- a dry paper strength enhancer for example, a dry paper strength enhancer, a wet paper strength enhancer, a softener, a release agent, a coating agent, a viscosity agent (knurl), a pH adjuster such as caustic soda, an antifoaming agent, a dye, etc. Chemicals can be added.
- the rice paper weight per sheet of the tissue paper according to the present invention is preferably 10 to 25 g / m 2 , more preferably 11 to 16 g / m 2 . If the rice tsubo is less than 10 g / m 2 , it is preferable from the viewpoint of improving softness, but it is difficult to ensure adequate strength that can withstand use. On the other hand, when the rice tsubo exceeds 25 g / m 2 , the entire paper becomes hard, and a feeling of stickiness is generated, resulting in poor touch.
- the US tsubo is based on the US tsubo measurement method of JIS P 8124 (1998).
- the crepe rate of the primary sheet constituting the tissue paper of the present invention is 10-30%, more preferably 13-20%.
- the crepe rate is expressed by the following equation. Crepe rate: ⁇ (peripheral speed of the dryer during papermaking) ⁇ (peripheral speed of the reel) ⁇ / (peripheral speed of the dryer during papermaking) ⁇ 100.
- the tissue paper of the present invention contains 2.0 to 5.5 g / m 2 , more preferably 3.0 to 5.0 g / m 2 of the drug on both sides. If the drug content is less than 2.0 g / m 2 , the effect of the drug is not exhibited, and if it exceeds 5.5 g / m 2 , the tissue paper has a sticky feeling and the wet paper strength is reduced.
- the viscosity of the chemical solution to be applied is 1 to 700 mPa ⁇ s at 40 ° C. from the viewpoint of high speed processing. More preferably, it is 50 to 400 mPa ⁇ s. If it is less than 1 mPa ⁇ s, the chemical solution is likely to scatter on rolls such as anilox roll, printing plate roll, and gravure roll, and conversely if it is greater than 700 mPa ⁇ s, it is difficult to control the amount of application to each roll or continuous sheet.
- the components are 70 to 90% polyol, 1 to 15% moisture, and 0.01 to 22% functional chemicals.
- the water content of the chemical solution to be applied was determined by the Karl Fischer method.
- Polyol includes polyhydric alcohols such as glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, and derivatives thereof, and sugars such as sorbitol, glucose, xylitol, maltose, maltitol, mannitol, and trehalose.
- polyhydric alcohols such as glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, and derivatives thereof
- sugars such as sorbitol, glucose, xylitol, maltose, maltitol, mannitol, and trehalose.
- Functional agents include softeners, surfactants, inorganic and organic fine particle powders, oily components, and the like.
- Softeners and surfactants have the effect of imparting flexibility to the tissue and smoothing the surface, and anionic surfactants, cationic surfactants and zwitterionic surfactants are applied.
- Inorganic and organic fine particle powders have a smooth surface.
- the oil component has a function of improving lubricity, and higher alcohols such as liquid paraffin, cetanol, stearyl alcohol, and oleyl alcohol can be used.
- a functional agent one of a hydrophilic polymer gelling agent, collagen, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hyaluronic acid or a salt thereof, ceramide, etc.
- a moisturizing agent such as any combination can be added.
- Deodorants such as flavors, emollients such as various natural extracts, vitamins, emulsifiers that stabilize compounding ingredients, antifoaming agents, antifungal agents, organic acids, etc.
- An agent can be appropriately blended. Furthermore, you may contain the antioxidant of vitamin C and vitamin E.
- a polyhydric alcohol such as glycerin or propylene glycol
- the temperature at the time of applying the chemical solution is preferably 30 ° C. to 60 ° C., preferably 35 ° C. to 55 ° C.
- the coating amount was calculated from the difference between each sheet basis weight when the chemical solution after ply was not applied during operation and each sheet basis weight immediately after the corresponding application.
- (Coating amount g / m 2 ) (Rice weight immediately after application g / m 2 ) ⁇ (Rice weight without application g / m 2 )
- the coating amount of both surface layers or the total coating amount of both surfaces is the total coating amount per unit area of the plyed tissue paper sheet, and the coating amount of each sheet is added.
- the drug application amount indicates the content of the drug component in a dry state (absolutely dry) included in the unit area of tissue paper in the standard state of JIS P 8111 (1998). Specifically, in the applied chemical solution The content of components other than moisture shall be indicated.
- the unit area of the tissue paper is an area of the plyed sheet viewed from a viewpoint perpendicular to the plane, and does not mean the total area of each plyed sheet and its front and back surfaces.
- the chemical application rate is the tissue paper product with a predetermined mass adjusted under the conditions of JIS P 8111 (1998) as the denominator (A) (g), and the water content in the chemical solution contained in the tissue paper product with the predetermined mass.
- the ratio of (B) divided by (A) is expressed as (%), with the removed mass (B) (g) as a molecule.
- (Drug content%) (B) ⁇ (A) ⁇ 100 (%)
- the chemical solution density is the drug content per volume of two-ply tissue paper in the standard state of JIS P 8111 (1998).
- the paper thickness of the tissue paper according to the present invention is 100 to 140 ⁇ m, more preferably 120 to 140 ⁇ m in a 2-ply state. If the paper thickness is less than 100 ⁇ m, it is preferable from the viewpoint of improving the softness, but it is difficult to ensure adequate strength as tissue paper. On the other hand, when the thickness exceeds 140 ⁇ m, the texture of the tissue paper is deteriorated and a feeling of tingling is generated during use.
- the specimen is fully conditioned under the conditions of JIS P 8111 (1998), and then the dial thickness gauge (thickness measuring instrument) “PEACOCK G type” (manufactured by Ozaki Seisakusho) It shall be measured in the state of 2 plies using. Specifically, confirm that there is no dust, dust, etc. between the plunger and the measuring table, lower the plunger on the measuring table, move the dial thickness gauge memory to adjust the zero point, then Raise the plunger, place the sample on the test bench, slowly lower the plunger and read the gauge at that time. At this time, only the plunger is placed.
- the dial thickness gauge thickness measuring instrument
- the terminal of the plunger is made of metal so that a circular plane having a diameter of 10 mm is perpendicular to the plane of the paper, and the load at the time of measuring the paper thickness is about 70 gf.
- the paper thickness is an average value obtained by performing measurement 10 times.
- the tensile strength of the tissue paper according to the present invention is measured in a two-ply state.
- the dry tensile strength is measured according to the tensile test method of JIS P 8113 (1998). Among them, it is cut into a width of 25 mm in the vertical direction and the horizontal direction under the standard conditions defined in JIS P 8111 (1998).
- the dry tensile strength of the tissue paper according to the present invention is 180 to 350 cN / 25 mm in the MD direction, more preferably 160 to 300 cN / 25 mm, 80 to 120 cN / 25 mm in the CD direction, and more preferably 80 to 110 cN / 25 mm.
- the ratio of the direction / CD direction is preferably 1.5 to 3.0.
- the wet tensile strength is determined according to JIS P 8135 (1998).
- the wet tensile strength of the tissue paper is 70 to 160 cN / 25 mm in the MD direction, more preferably 80 to 130 cN / 25 mm, and 33 to 50 cN / 25 mm, more preferably 35 to 45 cN / 25 mm in the CD direction.
- the softness value of the tissue paper of the present invention is 0.9 to 1.5 cN / 100 mm.
- the softness is measured based on the handle ohm method according to the JIS L1096 E method. However, the test piece was 100 mm ⁇ 100 mm in size, and the clearance was 5 mm. The measurement was performed 5 times each in the longitudinal direction and the lateral direction with 1 ply, and the average value of all 10 times was represented by 2 digits of decimal point and expressed in units of cN / 100 mm.
- the moisture content of the product is desirably 10.0 to 13.0%.
- the moisture content is determined based on JIS P 8127.
- Moisture content (%) ⁇ (weight of paper before drying) ⁇ (weight of paper after drying) ⁇ / (weight of paper before drying) ⁇ 100
- the elongation in the MD direction of the product is preferably 11.0 to 15.0%.
- the elongation rate here is measured using “Universal Tensile Compression Tester TG-200N” manufactured by Minebea Co., Ltd.
- the elongation is the “stretch at break” described in “3. Definition e) of JIS P 8113.
- the tissue paper of the present invention desirably has a static friction coefficient of 0.50 to 0.65, more preferably 0.55 to 0.60.
- the static friction coefficient here is measured by the following method according to JIS P 8147 (1998).
- the tissue paper peeled off in one ply is attached to the acrylic plate so that the outer surface of the tissue paper is on the outside. Wrap tissue paper around a 100 g weight with 2 plies and place it on the tissue on the acrylic plate. Tilt the acrylic plate and measure the angle at which the weight slides down. The angle is measured four times in the MD direction and four times in the CD direction for a total of eight times, the average angle is calculated, and the tangent value is taken as the coefficient of static friction.
- MMD is an average deviation (unit: dimensionless) of the friction coefficient ⁇ .
- MMD is one of the indices of smoothness. The smaller the numerical value, the smoother, and the larger the numerical value, the less smooth.
- a tension of 20 g / cm is applied to the contact surface of the friction element 112 in a predetermined direction (downward and rightward in FIG. 11A). While being brought into contact with the surface of the tissue paper 111, which is the measurement sample, at a contact pressure of 25 g, it is moved 2 cm at a speed of 0.1 cm / s in the same direction as the direction in which the tension is applied.
- the friction coefficient at this time was measured using a friction feeling tester KES-SE (manufactured by Kato Tech Co., Ltd.), and the average deviation of the friction coefficient ⁇ at a friction distance of 2 cm (moving distance was 3 cm, excluding 5 mm before and after each).
- the friction element 112 has 20 piano wires P with a diameter of 0.5 mm adjacent to each other, and has a contact surface formed so that the length and width are both 10 mm.
- the contact surface is formed with a unit bulging portion whose tip is formed of 20 piano wires P (curvature radius 0.25 mm).
- FIG. 11A schematically shows the friction element 112
- FIG. 11B shows an enlarged view of a portion surrounded by an alternate long and short dash line in FIG. 11A.
- the tissue paper according to the present invention is folded by an interfolder or the like, and is cut into a product size at any stage before or after the folding process. For example, 180 sets are packed into a product.
- the paper density after 180 sets of folding is preferably 0.15 to 0.25 g / cm 3 , more preferably 0.17 to 0.23 g / m 3 . If it is lower than 0.15 g / cm 3 , moist feeling and smoothness cannot be obtained, and if it is higher than 0.25 g / cm 3 , the thickness of the tissue paper is impaired and a sticky feeling is produced, and the water absorption is deteriorated. End up.
- the product density is the paper thickness (D) of tissue paper (2 ply) according to “PEACOCK G type”, which is a double value (C) of the tissue paper product tsubo conditioned under JIS P 8111 conditions.
- FIG. 1 the outline
- the ply machine which is an apparatus integrated with the coating device (on-machine coating).
- the base paper produced by the paper machine is creped as a continuous sheet, calendered, and wound up to form primary rolls 11 and 12 (generally also called jumbo rolls).
- the continuous sheets 31 and 32 are laminated by the laminating roller 13 to form two plies, and are subjected to a calendar process by a ply machine calendar 14 as necessary, and are sent to a chemical solution coating process.
- Any known coating method such as dipping, spray coating, flexo coating, and gravure coating can be used as the chemical coating method, but printing such as gravure coating and flexo coating that performs uniform chemical coating on the entire coated surface is possible.
- Use of the method, particularly the use of a flexo coater equipped with a doctor chamber 15, is more preferable because the chemical solution can be supplied in a stable coating amount.
- two flexo coaters 16 and 17 are provided, and a chemical solution is applied to each side of a two-ply continuous sheet.
- the processing speed is 100 to 1100 m / min, preferably 350 to 1050 m / min, particularly preferably 450 to 1000 m / min. If it is less than 100 m / min, the productivity is low, and if it is more than 1100 m / min, uneven coating occurs and the chemical solution is likely to scatter.
- the number of flexographic printing plate rolls is 10 to 60, preferably 15 to 40, and more preferably 20 to 35. If the number of lines is less than 10, many coating irregularities occur. On the other hand, if the number of lines exceeds 60 lines, the paper dust tends to clog.
- the number of anilox rolls is 10 to 300, preferably 25 to 200, and more preferably 50 to 100.
- the anilox roll has a cell capacity of 10 to 100 cc, preferably 15 to 70 cc, particularly preferably 30 to 60 cc. If the cell capacity is less than 10 cc, a desired coating amount cannot be obtained. On the other hand, if the cell capacity is more than 100 cc, the amount of chemical solution scattered increases.
- the flexographic printing method can stabilize the coating amount even when the processing speed is high, and can stably apply a wide range of chemical viscosity with a single roll.
- the processing speed is 100 to 1000 m / min, preferably 350 to 950 m / min, particularly preferably 450 to 950 m / min.
- productivity is low, and when it is more than 1000 m / min, coating unevenness occurs and the chemical solution is likely to be scattered.
- the number of gravure rolls is 40 to 160 lines, preferably 60 to 140 lines, particularly preferably 80 to 120 lines. If the number of lines is less than 40 lines, the amount of chemical solution scattered increases, whereas if the number of lines exceeds 160 lines, paper dust tends to be clogged.
- the sheet after applying the chemical solution is supplied to the contact embossing roller 18 and the roller roll 19 and fixed by subjecting the two-ply continuous sheet to a contact embossing (knurling) process.
- the continuous sheet 32 with a small amount of chemical solution applied is disposed so as to contact the contact embossing roller 18.
- the contact embossing is preferably uniformly applied in the longitudinal direction with a width of 1 to 10 mm at a position of 1/10 to 1/20 with respect to the paper width from both sides. Any of the known methods such as fixing the ply with an adhesive may be used. However, when using an adhesive, there is a problem that the touch tends to become hard, and it is easy to peel off when applying a chemical solution. It can be said that the use of embossing is more preferable.
- 2 ply continuous sheet with contact embossing is cut directly into product size after being subjected to folding processing by being directly applied to a rotary interfolder or the like, or after being cut into product width by slitter 20,
- the winding roll 21 makes a take-up secondary raw roll 22 which is folded and stored in a paper box.
- the chemical solution is applied before the contact embossing.
- the chemical solution may be applied after the contact embossing.
- the above-described secondary raw roll is used for the folding process particularly in tissue paper products.
- a known method such as a rotary interfolder or a multi-stand interfolder can be used, but it is more preferable to use a multi-stand interfolder with high productivity.
- Multi-stand type inter folder A large number of secondary web rolls 22 are set in a multi-stand type interfolder, and a tissue paper bundle is manufactured by drawing out a secondary continuous sheet from the set secondary web roll 22 and folding and stacking them.
- a tissue paper bundle is manufactured by drawing out a secondary continuous sheet from the set secondary web roll 22 and folding and stacking them.
- Reference numeral 2 in the drawing denotes secondary raw rolls 22, 22... Set on secondary raw roll support portions (not shown) of the multi-stand type interfolder 1.
- These secondary raw rolls 22, 22... are set side by side in the direction (the horizontal direction in FIG. 2, the front-to-back direction in FIG. 3) in which the required number is orthogonal to the illustrated plane.
- Each secondary raw roll R has slits in the width of tissue paper product in the above-described manufacturing equipment and manufacturing method of the secondary raw roll for tissue paper products. It is wound and set in double width.
- the continuous belt-like secondary continuous sheets 63A and 63B unwound from the secondary web roll 22 are guided by guide means such as guide rollers G1 and G1 and fed into the folding mechanism section 60.
- the folding mechanism part 60 is provided with the folding plate group 64 in which the required number of folding plates P, P ... are arranged in parallel as shown in FIG.
- guide rollers G2, G2 and guide round bar members G3, G3 for guiding a pair of continuous secondary continuous sheets 63A or 63B are respectively provided at appropriate positions.
- a conveyor 65 is provided that receives and conveys the laminated band 67 that is stacked while being folded.
- a folding mechanism using this type of folded plates P, P... is a mechanism known from, for example, US Pat. As shown in FIG. 5, this type of folding mechanism folds each continuous secondary continuous sheet 63A, 63B... In the Z-shape and is adjacent to the adjacent secondary continuous sheets 63A, 63B. Stack the ends together.
- FIGS. 6 to 9 show in detail the portions of the folding mechanism 60, particularly the folded plate P.
- FIG. In the folding mechanism 60, a pair of continuous secondary continuous sheets 63A and 63B are guided for each folded plate P. At this time, the continuous secondary continuous sheets 63A and 63B are guided by the guide round bar members G3 and G3 while being shifted in position so that the side end portions do not overlap each other.
- the continuous secondary continuous sheet that overlaps the lower side when guided by the folded plate P is the first continuous secondary continuous sheet 63A
- the continuous secondary continuous sheet that overlaps the upper side is the second continuous sheet.
- these continuous secondary sheets 63A and 63B are second continuous secondary continuous sheets of the first continuous secondary continuous sheet 63A.
- the side end e1 that does not overlap the sheet 63B is folded back to the upper side of the second continuous secondary continuous sheet 63B by the side plate P1 of the folded plate P, and as shown in FIG. 5 and FIG.
- the side end e2 of the continuous secondary continuous sheet 63B that does not overlap with the first continuous secondary continuous sheet 63A is folded downward so as to be drawn under the folded plate P from the slit P2 of the folded plate P. .
- the side end e3 (e1) of the continuous secondary continuous sheet 63A stacked while being folded in the upstream folded plate P is second from the slit P2 of the folded plate P.
- the side ends of adjacent continuous secondary continuous sheets 63A and 63B are crossed together, so that the product is used.
- the side edge of the next tissue paper is pulled out.
- the laminated band 70 obtained in the multi-stand type interfolder 6 as described above is cut (cut) at a predetermined interval in the flow direction FL by the cutting means 66 at the subsequent stage, and the tissue is cut.
- This tissue paper bundle 30a is further stored in the storage box B in the subsequent equipment as shown in FIG. 10 (a).
- the paper direction of the laminated band 70 is the vertical direction (MD direction) along the flow direction FL, and the horizontal direction along the direction orthogonal to the flow direction.
- Direction (CD direction) is the vertical direction along the flow direction FL, and the horizontal direction along the direction orthogonal to the flow direction.
- the direction of the paper of the tissue paper constituting the tissue paper bundle 67a obtained by cutting the laminated band 70 into a predetermined length is along the folding direction of the tissue paper, as shown in FIG.
- the horizontal direction (CD direction) and the vertical direction (MD direction) along the direction orthogonal to the folding direction of the tissue paper.
- FIG. 10 (b) shows an example of a product in which the tissue paper bundle 67a is stored in the storage box B.
- a perforation M is provided on the upper surface of the storage box B, and a part of the upper surface of the storage box B is broken by the perforation M so that the upper surface of the storage box B is opened.
- the opening is covered with a film F having a slit at the center, and the tissue paper T can be taken out through the slit provided in the film F.
- the direction of the paper of the tissue paper constituting the tissue paper bundle 67a is the horizontal direction (CD direction) along the folding direction of the tissue paper, as shown in FIG.
- the pulling direction is along the horizontal direction (CD direction) of the tissue paper T.
- the chemical-coated tissue paper according to the present invention can also be manufactured using an off-machine chemical-coated device.
- the ply process is performed using a ply machine as shown in FIG.
- the continuous sheets 31 and 32 from the primary raw rolls 11 and 12 are laminated by the laminating roller 13 to form two plies, and then supplied to the contact embossing roller 18 and the roller roll 19 without going through the chemical solution coating process.
- the two-ply continuous sheet provided with contact embossing is taken up by a winding roll 221 to form a secondary raw roll (not applied with a chemical) 222.
- the secondary raw roll is supplied to an off-machine chemical coating apparatus.
- the ply machine can be operated at 100 to 1100 m / min.
- the operation speed of the interfolder is rate-limiting, so that it is currently operated at 80 to 100 m / min.
- FIG. 13 shows a chemical liquid coating apparatus according to the second embodiment.
- the secondary raw sheet fed from the secondary original roll 222 is coated with a chemical solution by a flexo coater 216 provided with a doctor chamber 215.
- the chemical solution is applied only to one side of the two-ply secondary raw sheet, but may be applied to both sides.
- the sheet after applying the chemical solution is wound up by a winding drum 224 to form a tertiary raw roll 223.
- the tertiary material roll is supplied to a rotary interfolder and subjected to folding.
- FIG. 14 shows an example of a rotary interfolder.
- the two tertiary raw sheets 301A and 301B after applying the chemical solution are successively fed to the folding rolls 303A and 303B via the feed rolls 302A and 302B, respectively.
- Cutter blades 304A and 304B are fixed above the folding roll, and the original fabric sheet is cut at the position of the cutting die 305 on the folding roll.
- Vacuum holes V are arranged on both sides of the top of the cutting die 305 so that the cut sheet is not detached from the roll, and the sheet is fixed on the roll by the action of the vacuum.
- the folding roll also has a folding mold 306, and the cutting mold 305 and the folding mold 306 are alternately arranged at equal intervals.
- the length on the roll circumference between the two cutting dies 305 is the same as the length in the MD direction of the tissue product, and the length on the roll circumference of the folding die 306 adjacent to the cutting 305 is half of that.
- the folding mold 306 also has a vacuum hole.
- the cutting and folding molds of the two folding rolls 303A and 303B, or the folding mold and the cutting mold are respectively fitted by rotation.
- the sheet 301A and the sheet 301B are overlapped at the fitting position, and a crease is formed at a position where the sheet 301B overlaps the cutting line of the sheet 301A.
- the overlaid and creased sheets 301A and 301B are peeled off from the folding roll 303B by the vertical movement of the folding bar 307B.
- the sheet 301A is creased and peeled off from the folding roll 303A by the folding bar 307A.
- the cut sheets 301A and 301B are folded so as to engage with each other.
- the folded sheet is cut in the product width (CD direction) and boxed (FIG. 15).
- the pulling direction during use is the MD direction.
- Example 1 shows the results of evaluating the paper quality of the products of Examples and Comparative Examples according to the present invention.
- Examples 1 and 2 are tissue papers manufactured by the manufacturing process shown in the first embodiment, and are applied with chemicals on both sides. In Example 1, folding was performed using a multi-stand type interfolder, and in Example 2, folding was performed using a rotary type interfolder.
- Example 3 is a tissue paper manufactured using the manufacturing process shown in the second embodiment, in which chemical solution application is performed on one side and folding is performed using a rotary interfolder.
- Comparative Examples 1 and 4 to 7 are commercially available products
- Comparative Example 1 is a non-moisturizing general-purpose tissue paper
- Comparative Examples 4 and 5 are moisturizing lotion type tissue papers
- Comparative Examples 6 and 7 are non-moisturizing systems. It is a high-quality tissue paper with a large thickness.
- Comparative Example 2 is a tissue paper manufactured by using the manufacturing process shown in the first embodiment of the present invention and reducing the amount of chemical solution applied.
- Comparative Example 3 was manufactured by applying a chemical solution by double-sided coating by a gravure printing method in the manufacturing process shown in the second embodiment of the present invention, and applying a large amount of chemical solution compared to the Example. Tissue paper. The composition of the chemical solution applied to Examples 1 to 3 and Comparative Examples 2 and 3 was adjusted as shown in Table 1.
- Measure methods of rice tsubo, paper thickness, tensile strength, elongation rate, softness, static friction coefficient, and moisture content are as described in the section of the embodiment for carrying out the invention.
- the drug content indicates the ratio of the dry weight of the drug to the tissue paper basis weight.
- the tissue paper according to the present invention showed high values of the dry tensile strength and the wet tensile strength in the CD direction as compared with a commercially available moisturizing tissue.
- the wet tensile strength in the CD direction was higher than that of conventional general-purpose tissue paper. It was also shown that the softness and static friction coefficient were lower than those of commercial products, and the paper was smooth and soft.
- the tissue paper according to the present invention is not excellent in thickness, but has a softness, smoothness, moist feeling equal to or higher than that of a moisturizing tissue, and a sticky feeling seen in a moisturizing tissue. I found out that it was alleviated.
- the following can be considered as factors that have good slipperiness for the tissue paper according to the present invention.
- the hydrophilic components are absorbed into the pulp and the lipophilic components tend to remain on the paper surface. It is considered that surface friction is reduced.
- increasing the amount of chemical solution applied as in conventional moisturizing tissue the hydrophilic component is not sufficiently absorbed into the pulp and remains on the surface, reducing the friction reducing effect of the lipophilic component and the hydrophilic component (such as glycerin). It is presumed that the slipperiness decreases due to the viscosity of.
- the tissue paper according to the present invention is more functional, although there is an advantage that it has excellent smoothness and no stickiness. In the evaluation, good results were obtained in softness and moist feeling.
- the tissue paper according to the present invention has a sticky feeling seen in conventional moisturizing tissue and has a softness, smoothness, and moist feeling equivalent to or higher than that of the moisturizing tissue. It turned out to be.
- the tissue paper of the present invention can be used for tissue paper that is used for wiping, especially for wiping the body, and for facial use.
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Abstract
Description
ティシュペーパーの用途は、主にフェイシャル用を中心とした対人用途であり、保湿ティシューは鼻かみ用に特化された製品仕様とされている。
従来、ティシュペーパーは鼻かみ用途を中心としたフェイシャル用途で使用されてきたことから、肌触りの良さを追求するため、これまで数多くの試みがなされ、品質改良を重ねてきた。例えば、各種の柔軟剤を原料に添加し製品の柔軟性を向上させる、繊維粗度の低いしなやかな繊維を多く使用する、湿紙のドライヤー乾燥時の貼りつきとドクター当りの調整により細かなクレーピングを形成する、カレンダーにより表面性を向上させる、原料噴射速度と網部の速度の比率調整により横強度を維持しつつ原料の叩解度を低く調整する、等の技術により、紙の柔らかさや滑らかさの改善が図られてきた。
アレルギー性鼻炎や花粉症などのヘビーユーザーは日に数十回以上も鼻をかむことにより、鼻およびその周辺がティシューとの摩擦により、軽い炎症を起こし赤くなりヒリヒリとした傷みを感じやすい。そのため、このようなユーザーには、ティシュー表面の摩擦の小さなもの、つまり滑らかさを有する物が好ましく使用される。保湿ティシューはグリセリン等の吸湿性のある保湿剤を含む水系ローション薬液を、衛生薄葉紙の基紙に対し塗布する。グリセリンは化粧品に使われているように肌への刺激性が少なく、吸湿してティシューをしっとり、柔らかくするとともにティシューの表面に薄い皮膜を形成し、一般の非塗布ティシューに比して明らかに柔らかで、滑らかな肌触りを有する差別化した商品として認知されている。例えば、油性物質と保湿剤を外添塗布する技術が紹介されている(特許文献1)。
しかし、従来の保湿ティシューは、その本来の特性であるしっとり感、柔らかさ及び滑らかさを有するものであり、その吸湿性のために厚みに比して紙力が強くないことから、強く鼻をかむ際や肌に付着した粘着性の鼻水などを拭き取る際に破れやすい、という問題があった。さらに、従来の保湿ティシューには、その本来の特性であるしっとり感、柔らかさ及び滑らかさの代償として生じる上記のベタつき感を軽減するとともに、この破れやすさを充分に解決した製品は見られなかった。
<請求項1記載の発明>
表面に薬液が塗布された2プライのティシュペーパーであって、
薬剤含有量が両面で2.0~5.5g/m2であり、2プライを構成するシートの1層あたりの坪量が10~25g/m2であり、
2プライの紙厚が100~140μmであり、
ことを特徴とするティシュペーパー。
前記薬液の水分含有量が1~15重量%である、請求項1記載のティシュペーパー。
水分率が10.0~13.0%である、請求項1記載のティシュペーパー。
表面の静摩擦係数が0.50~0.65である、請求項1記載のティシュペーパー。
2プライのCD方向の乾燥引張強度が80~120cN/25mm、2プライのCD方向の湿潤引張強度が33~60cN/25mmである、請求項1記載のティシュペーパー。
ソフトネスが1.1~1.7cN/100mmである、請求項1記載のティシュペーパー。
表面に薬液が塗布された2プライのティシュペーパーの製造方法であって、
前記薬液を、薬剤含有量が両面で2.0~5.5g/m2となるように塗布し、
前記ティシュペーパーの2プライを構成するシートの1層あたりの坪量が10~25g/m2、
2プライの紙厚が100~140μmとなるように構成した、
ことを特徴とするティシュペーパーの製造方法。
以上のように、本発明は、従来の保湿ティシューと同等以上に柔らかく滑らかな風合いを有するとともに、従来の保湿ティシューよりもベタつき感がなく、かつCD方向の引張強度の高いティシュペーパーを提供するものである。
〔構造例〕
本発明に係るティシュペーパーの基材紙は、2枚の薄葉紙(以下、シートともいう)が積層されたプライ構造とする。
他方、本発明に係るティシュペーパーを構成する薄葉紙(シート)の原料パルプとしては、例えば、グランドウッドパルプ(GP)、プレッシャーライズドグランドウッドパルプ(PGW)、サーモメカニカルパルプ(TMP)等の機械パルプ:セミケミカルパルプ(CP)、針葉樹高歩留り未晒クラフトパルプ(HNKP)、針葉樹晒クラフトパルプ(NBKP)、広葉樹未晒クラフトパルプ(HNKP)、広葉樹未晒クラフトパルプ(LUKP)、広葉樹晒クラフトパルプ(LBKP)等の化学パルプ:デインクドパルプ(DIP)、ウェイストパルプ(WP)等の古紙パルプが挙げられる。原料パルプは、一種または二種以上を選択して用いることができる。好適には填料や異物を含まない化学パルプが好ましい。また、原料パルプ中には、藁パルプ、竹パルプ、ケナフパルプなどの木本類、草本類が含まれていてもよい。
本発明に係るティシュペーパーのシート1層あたりの米坪は、米坪は10~25g/m2、より好ましくは11~16g/m2とすることが好ましい。米坪が10g/m2未満では、柔らかさの向上の観点からは好ましいものの、使用に耐えうる十分な強度を適正に確保することが困難となる。逆に米坪が25g/m2を超えると紙全体が硬くなるとともに、ゴワ付き感が生じてしまい肌触りが悪くなる。なお、米坪は、JIS P 8124(1998)の米坪測定方法による。
本発明のティシュペーパーを構成する一次原反シートのクレープ率は10~30%、より好ましくは13~20%とする。ここで、クレープ率とは、下式で表わされるものとする。
クレープ率:{(製紙時のドライヤーの周速)-(リール周速)}/(製紙時のドライヤーの周速)×100。
本発明のティシュペーパーは、薬剤を両面合わせて2.0~5.5g/m2、より好ましくは3.0~5.0g/m2含有する。薬剤含有量が2.0g/m2未満であれば薬剤の効果が発揮されず、また、5.5g/m2を超えるとティッシュペーパーにベタつき感が生じ、また、湿潤紙力が低下する。
薬液塗布時の温度は30℃~60℃、好ましくは35℃~55℃とすることが好ましい。
塗布量は、操業中にプライ後の薬液を塗布しない場合の各々のシート米坪と、対応する塗布した直後の各々のシート米坪との差異により算出した。
(塗布量g/m2)=(塗布直後の米坪g/m2)-(塗布しない場合の米坪g/m2)
両表層の塗布量、もしくは両面の塗布量の合計とは、プライされたティシュペーパーのシートの単位面積当たりの塗布量の合計であり、各シートの塗布量を加算したものとする。
薬剤塗布量とは、JIS P 8111(1998)の標準状態におけるティシュペーパーの単位面積に対し含まれる乾燥状態(絶乾)の薬剤成分の含有量を示し、具体的には、塗布した薬液中の水分以外の成分の含有量を示すものとする。このティシュペーパーの単位面積とは、プライされたシートを平面に垂直線上にある視点から見た面積であり、プライされた各シート、およびその表裏面の合計面積を意味しない。
薬剤塗布率とは、JIS P 8111(1998)条件下において調湿させた所定質量のティシュペーパー製品を分母(A)(g)とし、所定質量のティシュペーパー製品中に含まれる薬液中の水分を除いた質量(B)(g)を分子として、(B)を(A)で除した比率を(%)で表す。
(薬剤含有率%)=(B)÷(A)×100(%)
薬液含有密度は、JIS P 8111(1998)の標準状態における2プライのティシュペーパーの容積当たりの薬剤含有量である。
本発明に係るティシュペーパーの紙厚は、2プライの状態で100~140μm、より好ましくは120~140μmとする。紙厚が100μm未満では、柔らかさの向上の観点からは好ましいものの、ティシュペーパーとしての強度を適正に確保することが困難となる。また、140μm超では、ティシュペーパーの肌触りが悪化するとともに、使用時にゴワツキ感が生じるようになる。
本発明に係るティシュペーパーの引張強度は、2プライの状態で測定する。
乾燥引張強度は、JIS P 8113(1998)の引張試験方法に準じて行う。その中でJIS P 8111(1998)に規定された標準条件下で、縦方向及び横方向に幅25mmに裁断するものとする。
本発明のティシュペーパーのソフトネスの値は、0.9~1.5cN/100mmとする。ここでのソフトネスは、JIS L1096 E法に準じたハンドルオメータ法に基づいて測定したものである。
但し、試験片は100mm×100mmの大きさとし、クリアランスは5mmで実施した。1プライで縦方向、横方向の各々5回ずつ測定し、その全10回の平均値を小数点2桁とし、cN/100mmを単位として表した。
製品の水分率は、10.0~13.0%とすることが望ましい。水分率はJIS P 8127に基づき求める。
水分率(%)={(乾燥前の紙の重量)-(乾燥後の紙の重量)}/(乾燥前の紙の重量)×100
製品のMD方向の伸び率は11.0~15.0%であるのが望ましい。ここでの伸び率は、ミネベア株式会社製「万能引張圧縮試験機 TG-200N」を用いて測定したものである。伸び率はJIS P 8113の「3.定義 e)に記載の「引張破断伸び(stretch at break)」のことである。
他方、本発明のティシュペーパーは、静摩擦係数が0.50~0.65、より好ましくは0.55~0.60であるのが望ましい。ここでの静摩擦係数は、JIS P 8147(1998)に準じた、下記の方法で測定する。
1プライにはがしたティシュペーパーを、ティシュペーパーの外側の面が外側に来るようにアクリル板に張り付ける。2プライのまま100gの分銅にティシュペーパーを巻きつけ、アクリル板上のティシューに乗せる。アクリル板を傾け、おもりが滑り落ちる角度を測定する。角度測定はMD方向同士で4回、CD方向同士で4回の計8回実施し、平均角度を算出し、そのタンジェント値を静摩擦係数とする。
MMDとは、摩擦係数μの平均偏差(単位:無次元)である。MMDは滑らかさの指標の一つであり、数値が小さいほど滑らかであり、数値が大きいほど滑らかさに劣るとされる。
なお、MMD値の測定方法としては、図11(a)に示すように、摩擦子112の接触面を所定方向(図11(a)における右斜め下方向)に20g/cmの張力が付与された測定試料であるティシュペーパー111の表面に対して25gの接触圧で接触させながら、張力が付与された方向と略同じ方向に速度0.1cm/sで2cm移動させる。このときの、摩擦係数を、摩擦感テスター KES-SE(カトーテック株式会社製)を用いて測定し、その摩擦係数μの摩擦距離2cm(移動距離は3cmで前後5mmずつを除く)における平均偏差をMMD値とした。
なお、摩擦子112は、直径0.5mmのピアノ線Pを20本隣接させてなり、長さ及び幅がともに10mmとなるように形成された接触面を有している。接触面には、先端が20本のピアノ線P(曲率半径0.25mm)で形成された単位膨出部が形成されている。
なお、図11(a)には、摩擦子112を模式的に表し、図11(b)には、図11(a)における一点鎖線で囲まれた部分の拡大図を示すものとする。
本発明に係るティシュペーパーは、インターフォルダ等により折り加工が施され、前記折り加工の前後いずれかの段階で製品サイズに裁断され、例えば180組が箱詰めされて製品となる。180組の折り加工後の紙密度は、0.15~0.25g/cm3、より好ましくは0.17~0.23g/m3とすることが好ましい。0.15g/cm3より低くするとしっとり感や滑らかさが得られず、0.25g/cm3より高くすると、ティシュペーパーの厚みが損なわれベタつき感が出てしまうとともに、吸水性が悪くなってしまう。
製品の密度は、JIS P 8111 条件下において調湿させたティシュペーパー製品米坪を2倍した値(C)を、「PEACOCK G型」によるティシュペーパー(2プライ)での紙厚(D)で除した値で、単位をg/cm3、小数点3桁で表す。
((密度(g/cm3))=(C(g/m2))×2÷(D(μm))
上記説明の本発明のティシュペーパーは、以下のようにして製造することが可能である。図1に、本発明に係るティシュペーパーのプライ工程の装置の概要を示した。なお、図1に係る工程は、塗布装置と一体となった装置であるプライマシンで実施されることが好ましい(オンマシン塗布)。
フレキソ印刷方式は、加工速度が高速であっても塗布量を安定させることができ、また、一つのロールで幅広い薬液の粘度を安定的に塗布することができる。
なお、本形態ではコンタクトエンボス前に薬液を塗布する構成をとっているが、コンタクトエンボス後に薬液を塗布する構成としてもよい。
二次原反ロール22は、マルチスタンド式インターフォルダに多数セットされ、セットされた二次原反ロール22から二次連続シートを繰り出して折り畳むと共に積層することによってティシュペーパー束が製造される。以下では、そのマルチスタンド式インターフォルダの一例について説明する。
本発明に係る薬液塗布ティシュペーパーは、オフマシンの薬液塗布装置を使用して製造することも可能である。オフマシンの薬液塗布を行う場合、プライ工程は図12に示すようなプライマシンを使用して行われる。一次原反ロール11,12からの連続シート31,32は積層ローラー13で積層されて2プライとされた後、薬液塗布工程を経ずに コンタクトエンボスコロ18及びコロロール19に供される。
図13に第2の実施形態に係る薬液塗布装置を示す。図示例において、二次原反ロール222から繰り出された二次原反シートは、ドクターチャンバー215を備えたフレキソコーター216により薬液を塗布される。図示例においては、薬液は2プライの二次原反シートの片面にのみ塗布されているが、両面に塗布する形態としてもよい。薬液塗布後のシートはワインディングドラム224により巻き取られ、三次原反ロール223とされる。三次原反ロールは、ロータリー式インターフォルダに供され、折り加工を施される。なお、薬液塗布後のシートをスリッターを介して製品幅に裁断した後に巻取って三次原反ロールとし、マルチスタンド式インターフォルダで折り加工を行ってもよい。
図14にロータリー式インターフォルダの例を示す。ロータリーインターフォルダ300において、薬液塗布後の2つの三次原反シート301A,301Bは、それぞれ連続的にフィードロール302A,302Bを介して、フォールディングロール303A、303Bに送られる。フォールディングロールの上方には、カッターブレード304A,304Bが固定されており、フォールディングロール上の切り型305の位置で原反シートが切断される構成となっている。切断されたシートがロール上から離脱しないよう、切り型305の頂点を挟んで両側にバキューム孔Vが配され、バキュームの働きによりシートをロール上に固定する。フォールディングロールは折り型306も有し、切り型305、折り型306は交互に等間隔に配される。2つの切り型305間のロール円周上の長さは、ティシュペー製品のMD方向の長さと同一とし、切り型305と隣接する折り型306のロール円周上の長さはその半分とする。なお、折り型306もバキューム孔を有する。
実施例1,2は第1の実施形態に示した製造工程により製造したティシュペーパーであり、薬液塗布を両面に行ったものである。実施例1は折り加工をマルチスタンド式インターフォルダで、実施例2は折り加工をロータリー式インターフォルダで行った。実施例3は、第2の実施形態に示した製造工程を用いて製造したティシュペーパーであり、薬液塗布を片面に行い、折り加工をロータリー式インターフォルダで行ったものである。
実施例1~3、比較例2,3に塗布する薬液の組成は、表1に示すように調整した。
5:大変優れている
4:優れている
3:基準と同等
2:劣る
1:顕著に劣る
さらに、薬液塗布ティシュペーパーについては、ベタつき感の有無についても評価を行った。
○:ベタつき感が少ない
×:明らかにベタつき感がある
官能評価において、本発明に係るティシュペーパーは、厚み感に優れたものではないものの、保湿ティシューと同等以上のやわらかさ、なめらかさ、しっとり感を有し、かつ、保湿ティシューにみられるベタつき感が軽減されていることが分かった。
11 一次原反ロール
12 一次原反ロール
15 ドクターチャンバー
16 フレキソコーター
17 フレキソコーター
20 スリッター
21 ワインディングドラム
22 原反ロール
60 折畳機構部
63 二次連続シート
65 コンベア
67 積層帯
112 摩擦子
215 ドクターチャンバー
216 フレキソコーター
222 二次原反ロール
223 三次原反ロール
300 ロータリーインターフォルダ
Claims (7)
- 表面に薬液が塗布された2プライのティシュペーパーであって、
薬剤含有量が両面で2.0~5.5g/m2であり、
2プライを構成するシートの1層あたりの坪量が10~25g/m2であり、
2プライの紙厚が100~140μmである、
ことを特徴とするティシュペーパー。 - 前記薬液の水分含有量が1~15重量%である、請求項1記載のティシュペーパー。
- 水分率が10.0~13.0%である、請求項1記載のティシュペーパー。
- 表面の静摩擦係数が0.50~0.65である、請求項1記載のティシュペーパー。
- 2プライのCD方向の乾燥引張強度が80~120cN/25mm、2プライのCD方向の湿潤引張強度が33~60cN/25mmである、請求項1記載のティシュペーパー。
- ソフトネスが1.1~1.7cN/100mmである、請求項1記載のティシュペーパー。
- 表面に薬液が塗布された2プライのティシュペーパーの製造方法であって、
前記薬液を、薬剤含有量が両面で2.0~5.5g/m2となるように塗布し、
前記ティシュペーパーの2プライを構成するシートの1層あたりの坪量が10~25g/m2、
2プライの紙厚が100~140μmとなるように構成した、
ことを特徴とするティシュペーパーの製造方法。
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