WO2014049838A1 - Produit de papier hygiénique et procédé de production de celui-ci - Google Patents

Produit de papier hygiénique et procédé de production de celui-ci Download PDF

Info

Publication number
WO2014049838A1
WO2014049838A1 PCT/JP2012/075113 JP2012075113W WO2014049838A1 WO 2014049838 A1 WO2014049838 A1 WO 2014049838A1 JP 2012075113 W JP2012075113 W JP 2012075113W WO 2014049838 A1 WO2014049838 A1 WO 2014049838A1
Authority
WO
WIPO (PCT)
Prior art keywords
toilet paper
web
paper product
paper
drying
Prior art date
Application number
PCT/JP2012/075113
Other languages
English (en)
Japanese (ja)
Inventor
康伸 大岡
大篭　幸治
Original Assignee
日本製紙クレシア株式会社
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 日本製紙クレシア株式会社 filed Critical 日本製紙クレシア株式会社
Priority to PCT/JP2012/075113 priority Critical patent/WO2014049838A1/fr
Priority to JP2013501050A priority patent/JP5495459B1/ja
Publication of WO2014049838A1 publication Critical patent/WO2014049838A1/fr

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • 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
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/006—Making patterned paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper

Definitions

  • This invention relates to the toilet paper product which has a pulp as a main component, and its manufacturing method.
  • Roll or sheet-like toilet paper products are manufactured by appropriately cutting a toilet paper web in which one or two or more toilet paper base papers are stacked into a predetermined size.
  • a toilet paper product web
  • a high bulk is an important factor in terms of quality in order to ensure moisture absorption capability.
  • strength and softness are also important.
  • a chemical called debonder or bulking agent is added to the papermaking raw material in the papermaking process and chemically treated to suppress loosening of the fiber layer of the web by suppressing interfiber bonding of pulp fibers.
  • a method of giving is known (Patent Document 1).
  • a method TAD (through air drying) method is a method in which wet paper is air-dried without press-dehydrating in the paper-making process. ), And a method of performing uneven treatment on the wet paper web between the wet paper formation and the drying process.
  • the cost of the drying energy becomes enormous. Furthermore, in the method of performing unevenness treatment after paper making, the bond between fibers and the paper layer structure are broken, the web strength is lowered, or the apparent bulk of the web is increased, but the paper layer bulk (caliper) of the web itself is increased ( There is a problem that it is difficult to produce a soft feeling).
  • the wet paper web is dehydrated by pressing it with a Yankee dryer at one or two roll press nips through a felt, and further attached to a Yankee dryer (cylinder) and then dried. Creping (crease) is performed when the web is peeled off from the dryer.
  • a press part like a double felt machine, it presses with the top and bottom rolls of a wet part, and dehydrates, and it may press against a Yankee dryer by a roll press nip after that.
  • a press part like a double felt machine, it presses with the top and bottom rolls of a wet part, and dehydrates, and it may press against a Yankee dryer by a roll press nip after that.
  • a press part like a double felt machine, it presses with the top and bottom rolls of a wet part, and dehydrates, and it may press against a Yankee dryer by a roll press nip after that.
  • the web becomes relatively low-bulk by applying to this Yankee dryer.
  • the TAD method described above is a technique in which the final drying and creping are performed with a Yankee dryer and dehydrated with a vacuum, and preliminarily dried with a ventilating dryer. And a high bulk web is obtained.
  • the TAD method removes moisture equivalent to press nip dehydration by ventilation heat, it is said that about twice as much drying energy is required as compared with the conventional roll press nip method.
  • Patent Document 4 a method of adjusting pressure dehydration by a wide press nip called a shoe press method.
  • the shoe press method can obtain a higher bulk and softness than the conventional roll press nip method, but cannot obtain a higher bulk than the TAD method.
  • Patent Document 5 a paper machine called a fabric press system has been developed (Patent Document 5).
  • the fabric press method follows the conventional press technology, but is provided with unevenness on the web by means of an uneven belt or fabric simultaneously with dewatering.
  • This dewatering and roughening is performed in one or more press nips while the wet web is fed from the felt to the roughening belt, and then the web is transported to a Yankee dryer and dried.
  • a high bulk equivalent to the TAD method can be obtained while the drying energy is equivalent to that of the conventional roll press nip method.
  • the structure of the web by the fabric press method is not a woven fabric, but forms a three-dimensional pattern similar to the woven fabric. This is considered because web unevenness is performed as follows. That is, during the pressing process, the fibrous network fills the three-dimensional pattern (pattern) of the concavo-convex belt, but at that time, the three-dimensional pattern of the concavo-convex layer forms a wet fibrous web. Is granted. The wet fibrous webs are moveable relative to each other, so that they take a new position and orientation relative to each other due to the elastic compression of the press felt. Press felt presses the wet fibrous web against the three-dimensional pattern of the textured belt, thereby increasing bulk and softness with the same basis weight and an improved structure. The bulk of the web is then maintained uncompressed by receiving a fibrous network (network) in cavities in the belt structure while dewatering in the press nip.
  • a fibrous network network
  • an object of the present invention is to provide a toilet paper product satisfying three of strength, bulk (specific volume), and softness, and a method for producing the toilet paper product.
  • the toilet paper product of the present invention comprises pulp as a main component and a set of one sheet or two or more sheets, and the basis weight of one sheet is 10 to 25 g / m. 2.
  • the specific volume is 7 to 15 cm 3 / g, and the product of the tensile strength DMDT in the longitudinal direction when dried according to JIS P8113 and the tensile strength DCDT in the lateral direction when dried according to JIS P8113
  • the square root (DMDT ⁇ DCDT) 1/2 (DGMT) is 1.4 to 3.8 N / 25 mm, and the height difference of the surface irregularities is 80 to 250 ⁇ m.
  • the area ratio of the concave portions on the surface is preferably 5 to 15%.
  • the water absorption specified in the old JIS-S3104 method is 3.0 seconds / 0.01 mL or less when the one set consists of one sheet, and the one set consists of two or more sheets. It is preferably 3.0 seconds / 0.1 mL or less, and the ease of unraveling by the JIS P4501 method is preferably 5 to 40 seconds. It is preferable that calendering is performed with a pair of rolls having a gap of 20 to 80% with respect to the paper thickness after papermaking and drying.
  • the method for producing a toilet paper product according to the present invention is a method for producing the toilet paper product, in which calendering is performed with a pair of rolls having a gap of 20 to 80% with respect to the paper thickness after papermaking and drying.
  • the web thickness after the papermaking and drying and before the calendering is preferably 130 ⁇ m or more and 350 ⁇ m or less.
  • the method for producing a toilet paper product according to the present invention is a method for producing the toilet paper product, in which an uneven fabric is pressed against a wet paper web to perform unevenness simultaneously with dehydration, and then the web is dried.
  • a toilet paper product having improved strength, bulk (specific volume) and softness can be obtained.
  • a toilet paper product according to an embodiment of the present invention is composed of one sheet or a set of two or more sheets, and the basis weight of one sheet is 10 to 25 g / m 2 , and the specific volume is 7 to 15 cm 3 / g, the DGMT of the toilet paper product is 1.4 to 3.8 N / 25 mm, and the height difference of the surface irregularities is 80 to 250 ⁇ m.
  • the area ratio of the recesses on the surface of the toilet paper product is preferably 5 to 15%.
  • the basis weight of one sheet is less than 10 g / m 2 , the strength decreases, and when it exceeds 25 g / m 2 , the cost increases and the softness is inferior.
  • the basis weight is preferably 10 to 22 g / m 2 , more preferably 13 to 19 g / m 2 .
  • the specific volume (per set) of the toilet paper product is less than 7 cm 3 / g, the soft feeling is poor and the softness (texture) is inferior.
  • the specific volume exceeds 15 cm 3 / g, the bulk (bulkiness) becomes high, but the smoothness is inferior and the smoothness (tactile feel) is deteriorated.
  • the specific volume is preferably 7 to 12 cm 3 / g, more preferably 7.5 to 10.5 cm 3 / g.
  • the DGMT of the toilet paper product is less than 1.4 N / 25 mm, the toilet paper product is easily shaken and is not suitable for practical use.
  • DGMT exceeds 3.8 N / 25 mm, it becomes hard and the softness is impaired.
  • the DGMT is preferably 1.4 to 3.4 N / 25 mm, more preferably 1.4 to 3.0 N / 25 mm.
  • the DGMT is the square root of the product of the tensile strength DMDT (Dry Machine Direction Tensile strength) in the dry direction and the tensile strength DCDT (Dry Cross Direction Tensile strength) in the transverse direction during the drying based on JIS P8113.
  • Toilet paper contains pulp as a main component (50% by mass or more). Pulp includes wood pulp, waste paper pulp, and non-wood pulp, but the pulp constituting toilet paper may be composed of 100% wood pulp, and may include waste paper pulp and non-wood pulp. Examples of components other than pulp include fillers, synthetic fibers, and natural fibers.
  • Pulp produced from Eucalyptus eucalyptus represented by Eucalyptus genus Grandis and Eucalyptus globulus is preferred as the grade of LBKP.
  • waste paper pulp can be contained to about 50 mass% with respect to the wood pulp of this pulp ratio. Waste paper pulp has a large variation in quality, and as the blending ratio increases, the quality of the product, particularly the softness, is greatly affected. Therefore, it is desirable to blend 20% by mass or less with respect to the wood pulp.
  • raw materials can be blended by ordinary means, and the strength can be adjusted by beating the pulp fibers.
  • the beating for obtaining the target quality 0 to 200 ml, more preferably 50 to 200 ml, and still more preferably 50 to 150 ml of filtered water with respect to a commercially available virgin pulp in Canadian standard freeness measured by JIS P8121. Reduce the degree. Moreover, you may use a wet paper strength enhancer suitably.
  • the difference in level of the unevenness on the surface of the toilet paper product is 80 to 250 ⁇ m, preferably 90 to 220 ⁇ m, more preferably 100 to 220 ⁇ m.
  • the area ratio of the concave portions on the surface is preferably 5 to 15%, more preferably 7 to 15%, and still more preferably 7 to 13%.
  • the surface means both sides facing the outside of the product (that is, the opposite side of the sheet overlapping surface) if the toilet paper is a product of 2 ply or more, and if it is a 1 ply product, Means both sides.
  • the height difference of the surface irregularities is measured using a shape measuring laser microscope.
  • the shape measurement laser microscope scans a laser light source, which is a point light source, into pixels obtained by dividing an XY plane in an observation field into a plurality of pixels through an objective lens, and detects reflected light for each pixel with a light receiving element. . Then, the objective lens is driven in the height (Z-axis) direction, and the height information and the reflected light amount are detected with the Z-axis position having the highest reflected light amount as a focal point. By repeating the scanning in this way, an ultra-deep light amount image and a high / low image (information) focused on the whole can be obtained. Since the laser light source is a pinhole confocal optical system, the measurement accuracy is high.
  • the product name “Ultra Deep Color 3D Shape Measurement Microscope VK-9510” manufactured by KEYENCE can be used.
  • the product name “VK Viewer” can be used as the observation / measurement software.
  • the measurement conditions are 200x magnification (standard objective lens uses 10x magnification), the measurement mode is color ultra-deep, the gain is adjusted automatically by Auto setting, the measurement pitch is 1 ⁇ m, the distance (range in the Z-axis direction) Set ( ⁇ m) to be equal to or greater than the sample paper thickness and measure. Note that the measurement is performed at a location other than the portion mechanically embossed by a process other than the paper machine (for example, a roll winder).
  • a height profile is acquired from the obtained image using image analysis software (VK Analyzer).
  • VK Analyzer image analysis software
  • a line segment L that crosses the observation visual field of the image shown in FIG. 3 is visually drawn so that a white portion and a black portion are adjacent to each other in the image. Since the white portion in FIG. 3 corresponds to the convex portion and the black portion corresponds to the concave portion, the line segment L may be determined so as to cross the portion where the white strong portion and the black strong portion are adjacent to each other.
  • the height profile is acquired by selecting one line segment L for each image. The length of the line segment L is 1.0-1.4 mm. Then, a height profile is obtained as shown in FIG. Here, the height profile in FIG.
  • the “contour curve” W is calculated from the cross-sectional curve of the height profile, and the difference between the maximum value MAX and the minimum value MIN of the “contour curve” is defined as the “concave height difference”.
  • the “contour curve” is ⁇ c: 250 ⁇ m from the cross-sectional curve (where ⁇ c is a “filter that defines the boundary between roughness component and waviness component” described in JIS-B0601 “3.1.1.2”). It is a curve obtained by removing the surface roughness component of the above by a low-pass filter. 4 is based on the height of the pedestal on which the sample is placed on the shape measuring laser microscope. In the line segment L, for example, when there is one peak (convex portion) and two valleys (concave portions) adjacent to it, the smallest MIN of the concave portion is used. When there are two peaks (convex parts), the maximum convex MAX is used. As described above, the field of view of the height profile (length of L) is 1.0-1.4 mm, and the above-mentioned embossing can be sufficiently avoided during measurement.
  • the area ratio of the recesses on the surface is obtained by performing image analysis on the surface of the toilet paper, considering dark portions below a predetermined threshold as recesses, and calculating the area ratio.
  • the surface of the toilet paper is captured as image data as shown in FIG. 5 using a commercially available image scanner (for example, Epson GT-X770), and a predetermined image analysis apparatus (for example, manufactured by Nippon Paper Industries Co., Ltd.).
  • the area ratio of the dark part below a predetermined threshold value is obtained under the conditions of a resolution of 800 dpi and a scanning area of 4 cm ⁇ 4 cm.
  • the above threshold is set to 98% close to the white side when black is 0 bits and white is 255 bits, and each dark part (shadow part) obtained is treated as particles (contamination).
  • the area ratio is measured by placing the toilet paper along one side of the scanner so that no wrinkles, perforations, folds, or the like enter the toilet paper sample, and capturing image data. Next, one side of the toilet paper is rotated by 90 ° C. with respect to the scanner, and each image data is captured (a total of four image data). This operation is repeated twice, and a total of 8 pieces of image data are captured. Further, the same operation is performed 8 times on the other surface of the toilet paper sample.
  • the 16 image data of the two surfaces (both sides) of the product thus obtained are subjected to the image analysis described above, the area ratio of the dark part (concave part) is measured, and the average value of these 16 area ratios Is adopted.
  • the measurement area to be measured at one time may be reduced. Increase the number of measurement points so that the measurement area is at least 0.0016m2. For example, if measuring 2 cm ⁇ 4 cm (0.0008 m 2) at two locations, the measurement area is 0.0016 m 2.
  • the toilet paper becomes appropriately bulky, and the softness (paper texture) is improved while ensuring the strength. In addition, water absorption is also improved.
  • the unevenness on the surface of the toilet paper becomes too low and the softness (paper texture) is inferior.
  • the strength (DGMT) is reduced to less than 1.4 N / 25 mm, and it is easy to break and smoothness is reduced. Inferior.
  • toilet paper is often mechanically embossed after paper making in a process other than the paper machine (for example, a roll winder).
  • embossing is performed, the bulk is increased and the softness is improved, but the strength is likely to decrease, so it is difficult to achieve both softness and strength.
  • the water absorption specified in the old JIS-S3104 method for toilet paper products is preferably 1.0 to 3.0 seconds / 0.01 mL when one set consists of one sheet (one ply), More preferably, it is 1.0 to 2.0 seconds / 0.01 mL.
  • the water absorption is preferably 1.0 to 3.0 seconds / 0.1 mL, and preferably 1.0 to 2.0 seconds / 0. More preferably, it is 1 mL. The smaller the water absorption, the better.
  • the water absorption of 1.0 second or less is “1.0 second (in the following table,“ ⁇ 1.0 Therefore, the lower limit of water absorption is 1.0 second / 0.01 mL for 1 ply and 1.0 second / 0.1 mL for 2 plies or more. Become. On the other hand, if the water absorption exceeds 3.0 seconds / 0.01 mL in the case of 1 ply, or exceeds 3.0 seconds / 0.1 mL in the case of 2 plies or more, the water absorption is slow and may not be practical. is there. The water absorption is defined in the old JIS-S3104 method, and “0.1 mL (or 0.01 mL)” is the amount of water dripped onto the toilet paper product.
  • the ease of loosening of toilet paper products according to the JIS P4501 method is preferably 5 to 40 seconds, more preferably 5 to 35 seconds, and still more preferably 5 to 30 seconds. If the ease of unraveling is less than the above range, it will be unraveled as soon as moisture adheres, and if the ease of unraveling exceeds the above range, it will be difficult to unravel.
  • the toilet paper of the present invention is formed by cutting the above-mentioned sheets one by one or by stacking two or more.
  • This toilet paper can be formed into, for example, a roll shape that is slit to the product width, or a sheet shape that is cut into a product width and a length, respectively, and then folded in a C shape.
  • FIG. 1 shows an example of a web manufacturing apparatus 50.
  • the apparatus 50 shown in FIG. 1 is a fabric press type paper machine, and can produce the web 103 with unevenness only by pressing means without using a ventilation drying (TAD) facility for preliminary dehydration.
  • the apparatus 50 includes a wet part 2 for forming a continuous web, a press part 3 for dewatering the web to be patterned or uneven, and a drying part 4 for finally drying the web.
  • the wet section 2 forms a wet paper in the form of a crescent former, a head box 6 for supplying a stock made of fiber and water to the forming area, a forming felt 8 for dehydrating a part of the water of the web, and the forming. It has a wire 9, a plurality of guide rolls 10, and a forming roll 7.
  • the head box 6 discharges a paper jet at a molding portion 5 between the forming wire 9 and the forming felt 8.
  • the forming wire 9 has an endless loop shape, travels around the plurality of guide rolls 10 and the forming roll 7, and contacts the forming felt 8 with the forming roll 7.
  • the stock discharged to the position 5 is dehydrated by the forming wire 9 to form the fibrous web 101, and the fibrous web 101 is conveyed to the press unit 3 by the forming felt 8.
  • the forming felt 8 is also in the form of an endless loop that travels around a plurality of guide rolls 18.
  • molding part 5 can also be used as a suction breast roll former.
  • the press unit 3 includes a main press 11 and a textured fabric 14, and the main press 11 includes a first press element 12 and a second press element 13.
  • the first and second pressing elements 12, 13 are pressed together to form a press nip N1 therebetween.
  • the main press 11 is a roll press and forms a twin roll in which the first and second pressing elements 12 and 13 face each other.
  • the first press element (roll) 12 is located in the loop of the textured fabric 14, the second press element (roll) 13 is located in the forming felt 8 loop, and the forming felt 8 is formed at the press nip N1.
  • the main press 11 may be a long nip press or a shoe press (not shown).
  • the uneven fabric 14 has an endless loop shape and runs around a plurality of guide rolls 15 and a smooth transfer roll 16 facing the drying unit 4.
  • the uneven fabric 14 contacts with the fibrous web 101 conveyed by the forming felt 8 through the press nip N1 of the main press 11 when traveling around the first press element (roll) 12.
  • the uneven fabric 14 performs dehydration and uneven formation of the fibrous web 101 to form the uneven fibrous web 102.
  • the uneven fibrous web 102 is conveyed to the transfer roll 16 by the uneven fabric 14.
  • the transfer roll 16 faces a drying cylinder 19 of the drying unit 4 described later, and forms a transfer nip N2 therebetween.
  • corrugated fibrous web 102 conveyed by the transfer nip N2 is provided only to drying, without performing press and spin-drying
  • the forming felt 8 functions as a water-receiving press felt 17 that is elastically deformable and compressible in the z-direction (thickness direction).
  • the water-receiving press felt 17 immediately separates the textured fibrous web 102 that has passed through the press nip N1, and prevents the web 102 from being wetted again.
  • the dryness of each of the webs 101 and 102 can be in the range of fiber concentration from 15 to 30% to 42 to 52%.
  • the drying unit 4 includes a drying cylinder 19, a creping doctor 21, and a hood 22 that covers the drying cylinder 19.
  • the drying cylinder 19 is a Yankee dryer, but other types of drying units (for example, an air-through dryer or a metal drying belt) can be applied. Further, the drying unit may be a single drying unit (for example, one cylinder as shown in FIG. 1), or may be constituted by a plurality of drying units.
  • the surface of the drying cylinder 19 forms a drying surface 20 for drying the textured fibrous web 102 in the vicinity of the transfer nip N2.
  • the creping doctor 21 is also disposed downstream of the drying surface 20 and crepes the concavo-convex fibrous web 102 dried by the drying surface 20, thereby providing a final web that has been both concavo-convex and creped. 103 is obtained.
  • crepe is a known method in which paper is mechanically compressed in the machine direction (machine running direction) to form a wavy crease called crepe, and the paper is bulky, soft and water-absorbing. , Imparts surface smoothness, aesthetics (crepe shape), etc. Then, the uneven fibrous web 102 is transferred from the uneven fabric 14 to the drying surface 20 of the drying cylinder 19 at the transfer nip N2.
  • the pressure in the transfer nip N2 is 1 MPa or less, and the web 102 does not dehydrate at this pressure.
  • an adhesive may be applied to the dry surface 20 by the spray device 23.
  • the spray device 23 can be placed between the creping doctor 21 and the transfer nip N2 at a position where the drying surface 20 is open.
  • Examples of the uneven fabric 14 include a mesh-like wire in which metal or synthetic resin (plastic) wires are knitted in the vertical and horizontal directions as warps and wefts.
  • the number of wires the number of warps and wefts may be 20 to 70 / 2.54 cm, preferably 20 to 65 / 2.54 cm, and more preferably 25 to 60 / 2.54 cm.
  • the wire diameter of the wire may be 0.21 to 0.70 mm, preferably 0.21 to 0.55 mm, and more preferably 0.21 to 0.45 mm.
  • the unevenness of the surface of the uneven fabric 14 is too strong and the unevenness of the surface of the toilet paper is also strong.
  • the height difference of the unevenness and the area ratio of the recessed portion exceed the above range, the unevenness of the surface of the toilet paper becomes too high, the strength (DGMT) is lowered to less than 1.4 N / 25 mm, it is easily broken, and the smoothness is inferior .
  • the number of warps and wefts exceeds the above range, or when the diameters of the warp and weft are less than the above range, the unevenness on the surface of the uneven fabric 14 is too low, and the unevenness on the surface of the toilet paper is also low.
  • the height difference of the unevenness and the area ratio of the recesses are less than the above range, and the softness (paper texture) is inferior.
  • the number of warps and wefts is about 70 to 200 / 2.54 cm, respectively.
  • the diameters of the warp and weft are about 0.08 to 0.20 mm.
  • the number of wires and the wire diameter shown above are the values of the top surface of the wire (surface on which the wet paper and the wire are in contact).
  • the calender part 60 is composed of a pair of opposed rolls 61 and 62, and the paper 103 and the web 103 with the unevenness after drying are inserted into the gap between the rolls 61 and 62 and calendered.
  • the gap distance t 1 between the rolls 61 and 62 is set to 20 to 80% with respect to the thickness t 0 of the web 103, a smoother and more flexible bulky web can be obtained.
  • the web becomes smooth, but valcross is generated, and a bulky and fluffy web with a specific volume of 7 to 15 cm 3 / g may not be obtained. If the distance t 1 exceeds 80% of the thickness t 0 , it may be difficult to smooth the web. If the distance t 1 is 20 to 80% of the thickness t 0 , the caliper (thickness) of the web that has passed through the rolls 61 and 62 is restored to some extent naturally, minimizing caliper reduction, flexibility, The surface property can be improved while minimizing the thickness reduction.
  • the rolls 61 and 62 a steel roll, a chilled roll, a metallic roll such as a surface hard plating finish roll, or a cylinder coated with an elastic material can be used.
  • a metal roll is preferable in that the web can be made smoother.
  • the web thickness t 0 before calendering is 130 to 350 ⁇ m / sheet, preferably 150 to 350 ⁇ m / sheet, more preferably 200 to 300 ⁇ m / sheet.
  • the web thickness after calendering is 80 to 280 ⁇ m / sheet, preferably 100 to 250 ⁇ m / sheet, more preferably 100 to 200 ⁇ m / sheet.
  • the thickness after processing the toilet paper product is 0.8 to 2.5 mm / 10 sheets, preferably 0.8 to 2.0 mm / 10 sheets, more preferably 0.85 to 2.0 mm / 10 sheets. .
  • the presence or absence of calendar processing, embossing, and the presence or absence of printing can be selected as appropriate.
  • a paper press of the fabric press system shown in FIG. 1 is used as a web of toilet paper of one and two sheets of sheets having the characteristics shown in Tables 1 and 2 with NBKP 30% and LBKP 70%. 50 was used to produce a web 103 with unevenness.
  • Table 1 shows the calendering conditions.
  • the concavo-convex fabric 14 a mesh-like plastic wire knitted longitudinally and laterally as warp and weft was used, and the warp and weft numbers and wire diameters of the wire were defined as shown in Tables 1 and 2.
  • Basis weight measured based on JIS P8124 and converted per sheet.
  • Thickness Measured using a thickness gauge (a dial thickness gauge “PEACOCK” manufactured by Ozaki Seisakusho). The measurement conditions were a measurement load of 250 gf and a probe diameter of 30 mm. A sample was placed between the probe and the measurement table, and the gauge was read when the probe was lowered at a speed of 1 mm or less per second. One measurement was performed by stacking 10 samples, and the measurement was repeated 10 times and the measurement results were averaged.
  • Specific volume The thickness per sheet was divided by the basis weight per sheet, and expressed as a volume cm 3 per unit g.
  • DGMT Gross Tensile Strength
  • Water absorption In accordance with the old JIS-S3104 method, 0.01 ml (for 1 ply) or 0.1 ml (for 2 ply) of purified water is dropped at a temperature of 23 ⁇ 1 ° C and humidity of 50 ⁇ 2%. Then, the time (seconds) for the water droplets to be absorbed by the toilet paper product was measured. The height difference of the unevenness on the front and back surfaces of the toilet paper and the area ratio of the recesses were measured as described above.
  • Evaluation of softness, smoothness, and resistance to tearing was performed by sensory evaluation by 20 monitors.
  • the evaluation criteria was a relative evaluation of each sample with a maximum score of 5 points.
  • the evaluation criteria are as follows. If the evaluation is 3 points or more, the characteristics are excellent. In addition, 1 ply was 1 to 4 points, and 2 ply was 1 to 5 points. ⁇ : 5 to 3 points ⁇ : 2 to 1 points
  • the basis weight of one sheet is 10 to 25 g / m 2
  • the specific volume is 7 to 15 cm 3 / g
  • the strength (DGMT) of the toilet paper product is 1.4.
  • DGMT strength of the toilet paper product
  • a toilet paper product excellent in strength, bulk (specific volume) and softness was obtained.
  • the height difference of the unevenness on the front and back surfaces was 80 to 250 ⁇ m
  • the area of the recesses on the front and back surfaces The rate was 5-15%.
  • Example 4 In the case of Example 4 in which the number of warp and weft yarns of the uneven fabric is maximized and the wire diameter is the thinnest, the unevenness of the toilet paper surface is lower than that of the other examples, the unevenness level difference and the recesses Although the value of the area ratio is smaller than that of the other examples, there is no practical problem.
  • Examples 7 and 8 in which the number of warp and weft yarns of the uneven fabric is minimized and the wire diameter is the thickest, the unevenness of the toilet paper surface is higher than in the other examples, the unevenness level difference and the recesses Although the value of the area ratio is larger than that of the other examples, there is no practical problem.
  • the unevenness of the surface unevenness was less than 80 ⁇ m, and the softness was inferior.
  • the DGMT can be appropriately adjusted depending on, for example, the raw material of pulp and the blending amount thereof, the beating degree, the presence / absence of addition of a paper strength agent, and papermaking conditions.

Landscapes

  • Sanitary Thin Papers (AREA)
  • Paper (AREA)

Abstract

La présente invention vise à proposer un produit de papier hygiénique satisfaisant les conditions liées à la résistance, la masse (volume spécifique) et la souplesse. L'invention vise également à proposer un procédé de production dudit produit de papier hygiénique. L'invention porte sur un produit de papier hygiénique qui contient de la pâte en tant qu'ingrédient principal et dans lequel une feuille est formée en tant qu'une seule couche ou en tant qu'une paire ayant deux ou plusieurs couches, le grammage d'une feuille est de 10 à 25 g/m2 et le volume spécifique d'une feuille est de 7 à 15 cm3/g. Le produit de papier hygiénique est caractérisé en ce que la racine carrée ((DMDT×DCDT)1/2(DGMT)) du produit de la résistance à la traction (DMDT) dans la direction verticale et de la résistance à la traction (DCDT) dans la direction latérale, telles que mesurées selon JIS P8113 lorsque le produit de papier hygiénique est sec, est de 1,4 à 3,8 N/25 mm, et la différence de hauteur des parties concaves et des parties convexes sur la surface est comprise entre 80 et 250 µm.
PCT/JP2012/075113 2012-09-28 2012-09-28 Produit de papier hygiénique et procédé de production de celui-ci WO2014049838A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2012/075113 WO2014049838A1 (fr) 2012-09-28 2012-09-28 Produit de papier hygiénique et procédé de production de celui-ci
JP2013501050A JP5495459B1 (ja) 2012-09-28 2012-09-28 トイレットペーパー製品の製造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/075113 WO2014049838A1 (fr) 2012-09-28 2012-09-28 Produit de papier hygiénique et procédé de production de celui-ci

Publications (1)

Publication Number Publication Date
WO2014049838A1 true WO2014049838A1 (fr) 2014-04-03

Family

ID=50387299

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/075113 WO2014049838A1 (fr) 2012-09-28 2012-09-28 Produit de papier hygiénique et procédé de production de celui-ci

Country Status (2)

Country Link
JP (1) JP5495459B1 (fr)
WO (1) WO2014049838A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180114110A (ko) 2016-02-08 2018-10-17 쥐피씨피 아이피 홀딩스 엘엘씨 종이 제품의 제조를 위한 성형 롤
CN108779606B (zh) 2016-02-08 2021-09-14 Gpcp知识产权控股有限责任公司 使用模塑辊制成纸产品的方法
ES2954273T3 (es) * 2016-02-08 2023-11-21 Gpcp Ip Holdings Llc Métodos de fabricación de productos de papel utilizando un rodillo de moldeo

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001159089A (ja) * 1999-11-29 2001-06-12 Crecia Corp プラスチック被覆紙原料から取り出した良質のセルロース繊維を高配合した衛生用紙
WO2006022288A1 (fr) * 2004-08-25 2006-03-02 Daio Paper Corporation Tissu jetable pour usage ménager
JP2006508279A (ja) * 2002-11-27 2006-03-09 キンバリー クラーク ワールドワイド インコーポレイテッド 高い嵩、柔らかさ、及び堅さを有するロールティッシュ製品
JP2011506780A (ja) * 2007-11-20 2011-03-03 オルバニー インターナショナル コーポレイション 凹凸付けベルト、高バルクなクレープティッシュ紙ウエブ製造用のプレス部分および製紙機械、ならびにその製造方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA9710013B (en) * 1996-11-14 1998-05-25 Procter & Gamble Method of drying a paper web having both bulk and smoothness.
EP1365068B1 (fr) * 2002-05-10 2008-05-07 The Procter & Gamble Company Tissu gaufré avec des fibres détachées de sa surface et procédé de sa production

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001159089A (ja) * 1999-11-29 2001-06-12 Crecia Corp プラスチック被覆紙原料から取り出した良質のセルロース繊維を高配合した衛生用紙
JP2006508279A (ja) * 2002-11-27 2006-03-09 キンバリー クラーク ワールドワイド インコーポレイテッド 高い嵩、柔らかさ、及び堅さを有するロールティッシュ製品
WO2006022288A1 (fr) * 2004-08-25 2006-03-02 Daio Paper Corporation Tissu jetable pour usage ménager
JP2011506780A (ja) * 2007-11-20 2011-03-03 オルバニー インターナショナル コーポレイション 凹凸付けベルト、高バルクなクレープティッシュ紙ウエブ製造用のプレス部分および製紙機械、ならびにその製造方法

Also Published As

Publication number Publication date
JPWO2014049838A1 (ja) 2016-08-22
JP5495459B1 (ja) 2014-05-21

Similar Documents

Publication Publication Date Title
JP5883412B2 (ja) ハンドタオル及びその製造方法
JP5455265B2 (ja) トイレットペーパー製品及びその製造方法
WO2013136471A1 (fr) Produit de papier hygiénique et son procédé de fabrication
JP5455262B2 (ja) ティシュペーパー製品
US7037406B2 (en) Cross-machine direction embossing of absorbent paper products having an undulatory structure including ridges extending in the machine direction
JP6162368B2 (ja) 衛生用紙ウェッブの製造方法
JP5602962B2 (ja) トイレットペーパー製品
JP6606147B2 (ja) トイレットロール
JP5495460B1 (ja) フェイシャルティシュ製品の製造方法
JP5495459B1 (ja) トイレットペーパー製品の製造方法
JP2017225845A (ja) トイレットロール
JP5373208B1 (ja) キッチンタオル及びその製造方法
JP2018000835A (ja) トイレットロール
JP6606146B2 (ja) トイレットロール
JP5602961B2 (ja) フェイシャルティシュ製品
JP7291132B2 (ja) 新規なプレスフェルトを使用して改良されたセルロース製品を作るための方法、およびその方法から作られた製品
JP5468686B1 (ja) ハンドタオル及びその製造方法
CN216060321U (zh) 卫生薄页纸
WO2013157137A1 (fr) Papier mouchoir et son procédé de fabrication
JP7206458B2 (ja) トイレットロール
JP6735251B2 (ja) トイレットロール
JP2024011666A (ja) トイレットロール
EA040087B1 (ru) Способ изготовления мягких абсорбирующих листов

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2013501050

Country of ref document: JP

Kind code of ref document: A

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12885534

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12885534

Country of ref document: EP

Kind code of ref document: A1