WO2012043378A1 - 水解性衛生薄葉紙及び水解性衛生薄葉紙の製造方法 - Google Patents

水解性衛生薄葉紙及び水解性衛生薄葉紙の製造方法 Download PDF

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Publication number
WO2012043378A1
WO2012043378A1 PCT/JP2011/071613 JP2011071613W WO2012043378A1 WO 2012043378 A1 WO2012043378 A1 WO 2012043378A1 JP 2011071613 W JP2011071613 W JP 2011071613W WO 2012043378 A1 WO2012043378 A1 WO 2012043378A1
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Prior art keywords
water
sanitary thin
thin paper
concave
embossing
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PCT/JP2011/071613
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English (en)
French (fr)
Japanese (ja)
Inventor
平沢　朗
正浩 金田
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大王製紙株式会社
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Priority to JP2012536391A priority Critical patent/JP5931734B2/ja
Publication of WO2012043378A1 publication Critical patent/WO2012043378A1/ja

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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
    • D21H27/002—Tissue paper; Absorbent paper

Definitions

  • the present invention relates to a water-decomposable sanitary thin paper represented by toilet paper.
  • Toilet paper a water-degradable sanitary thin paper
  • This type of water-decomposable sanitary thin paper may be embossed to improve wiping performance and to express bulkiness, flexibility and surface smoothness.
  • embossing is a metal embossing roll formed with a plurality of embossed protrusions and elastic surfaces that receive these embossed protrusions from the characteristics of water-degradable sanitary thin paper that is stretchable, low basis weight and composed of thin crepe paper It is common to use a steel rubber system that combines a pair of elastic rolls with
  • the crepe paper is laminated after embossing between steel roll and rubber roll, and the surface of the sheet between steel roll and steel roll.
  • the type of embossing on the back side is called double embossing, and the form of embossing after laminating multiple crepe papers is called single embossing and distinguished (however, single embossing is not limited to laminated crepe papers) ).
  • the above-mentioned double embossing has the advantage of making a water-degradable sanitary thin paper that is bulky and thick by bringing the tops of the given convex unit embosses into contact with each other, while reducing the difference in smoothness on both sides.
  • a corresponding embossing roll is required.
  • the contact area of the crepe paper to be laminated becomes small, there is a drawback that water disintegration is deteriorated when glue is used for lamination integration.
  • single embossing requires only one embossing roll to give embossing to laminated crepe paper at a time, and since the embossing contributes to the lamination integration of crepe papers, no glue is required.
  • the embossed convex part is pushed into the elastic roll to give embossing. Therefore, in order to give a bulky and deep embossed form in a single embossed form, the embossed convex part with a height is embossed.
  • the surface to be embossed that is, the paper surface in contact with the metal roll is rough.
  • the smoothness is deteriorated
  • the fiber is tightened, the water disintegrating property, which is the advantage of single embossing, is deteriorated, and the paper itself is thinned and the stiffness is lost.
  • the fibers are tightened particularly at the bottom of the recess formed by being pressed by the embossed protrusion, and an unnecessary gloss is developed, resulting in poor design.
  • the main problem of the present invention is to improve the bulkiness and the smoothness of the paper surface of a single embossed water-decomposable sanitary thin paper using a steel rubber system.
  • the present invention that has solved the above problems and the effects thereof are as follows.
  • ⁇ Invention of Claim 1> In the water-degradable sanitary thin paper that is embossed by the steel rubber method and the emboss is a single emboss, The recesses on the regularly arranged dome, A strong pressing portion that is convex from the bottom of the recess formed between the recesses, A small convex portion group consisting of a plurality of small convex portions protruding from the concave surface of some or all of the concave portions, A water-decomposable sanitary thin paper that is embossed by a convex embossing roll formed on a peripheral surface.
  • planar view shape of the recess is a rounded square
  • the small convex portion group is configured by regularly arranging 1 to 6 small convex portions, and the small convex portion group is regularly arranged on the peripheral surface of the convex embossing roll.
  • FIG. 3 is a cross-sectional view taken along line AA in FIG. 2.
  • FIG. 3 is a sectional view taken along line BB in FIG. It is a figure for demonstrating the measuring method of MMD of the water-decomposable sanitary thin paper of this invention. It is a top view for demonstrating the embossing provision pattern of the convex embossing roll concerning a comparative example. It is a perspective view for demonstrating the embossing provision pattern of the convex embossing roll concerning a comparative example. It is a figure of the water-decomposable sanitary thin paper concerning the Example of this invention. It is a figure of the water-decomposable sanitary thin paper concerning a comparative example.
  • the water-decomposable sanitary thin paper X1 of the present invention has embossing, and preferably has a two-ply or more ply structure (laminated structure) in which crepe paper is laminated, and is provided with embossing. .
  • the number of plies is not particularly limited. However, if too many plies are used, problems such as poor water disintegration, a large difference in smoothness between the front and back surfaces, and easy ply separation may occur. It is.
  • the crepe paper for constituting the ply of the water-decomposable sanitary thin paper X1 of the present invention preferably has a thickness of 100 to 200 ⁇ m. If the thickness is less than 100 ⁇ m, the emboss may be broken at the time of embossing. If the thickness is 200 ⁇ m, the emboss may not be firmly formed, and the effect of the emboss shape and emboss pattern of the present invention may not be sufficiently exhibited.
  • the embossing applied to the water disintegratable sanitary thin paper X1 of the present invention is a single embossing provided by a steel rubber method. That is, the embossing applied to the water-decomposable sanitary thin paper X1 of the present invention passes the crepe paper S1 or the laminated crepe paper S1 between the convex embossing roll and the circumferential elastic roll arranged parallel to the rotation axis and circumferentially butted, It is an emboss formed by transferring an emboss pattern arranged on the peripheral surface 1 of the convex embossing roll 60 to the crepe paper S1, and a concave portion on one surface of the paper surface corresponds to the concave portion on the other surface. It is a part of the embossed form in which both are exposed on the paper surface.
  • the present invention is different from that provided by a pair of convex embossing rolls such as a so-called steel match embossing system.
  • Steel match embossing can provide embossing with no difference between the front and back sides, but a crepe paper having a low basis weight made of pulp fibers such as crepe paper tends to break during embossing.
  • the present invention since the present invention has a characteristic small convex portion group, it is difficult to adopt a steel match embossing method. Further, in the present invention, it is not a double embossing in which embossing is separately applied to each crepe paper such as a so-called tip-to-tip type.
  • the water-decomposable sanitary thin paper X1 of the present invention can be embossed very easily by using a single emboss applied by a steel rubber method, and crepe papers can be laminated and integrated without using glue. High water disintegration property can be exhibited. Moreover, since it is a single emboss, since it is not necessary to give emboss to each crepe paper separately, manufacture is also easy. And the desired effect of the water-degradable sanitary thin paper X1 of this invention is achieved by the structure of the surrounding surface 1 of the convex embossing roll 60. FIG.
  • an elastic nip roll having a circumferential surface made of an elastic member such as rubber is suitable.
  • the surface has a Shore hardness of 40 to 60 degrees. If the Shore hardness is too low, that is, if the surface elastic roll surface is too soft, the crepe paper S1 may be broken during embossing. On the other hand, if the Shore hardness is too high, that is, if the surface of the peripheral elastic roll is too hard, the pattern of the peripheral surface 1 of the convex embossing roll 60 may not be transferred.
  • the nip pressure (also referred to as embossing pressure or linear pressure) for embossing is 5 to 30 kgf / cm, preferably 10 to 25 kgf / cm. If the nip pressure is too low, the effect that the emboss becomes clear may not be sufficiently exhibited. On the other hand, if the embossing pressure is too high, there is a risk that the crepe paper S1 will break.
  • embossing is given to the crepe paper S1 so that the unevenness of the peripheral surface 1 of the convex embossing roll 60 formed of a hard material such as hard resin or metal bites into the surface of the peripheral elastic roll 61. Therefore, not only the convex part formed on the peripheral surface 1 of the convex embossing roll 60 but also the shape of the concave part is an important factor. And in this invention, the uneven
  • the concave portions 10 on the dome regularly arranged, the strong pressing portion 11 that is convex between the concave portions formed between the concave portions 10, and the concave portions 10 are provided.
  • a small convex portion group 12 including a plurality of small convex portions 12t protruding from the concave surface is formed.
  • the crepe paper S1 passed between the peripheral elastic roll 61 is gently pressed and held at the part of the dome on the dome 10 where it enters the concave part 10, and the strong pressing part 11 is also held.
  • a concave emboss is firmly formed on the paper surface. Accordingly, the concave portion 10 can be deepened without breaking the crepe paper S1, and the concave embossing and the convexity of the opposite surface corresponding to the concave embossing by the strong pressing portion 11 having a relatively high relative height.
  • Embossing can be formed firmly (Note that in the present invention, a convex embossed part is formed on the opposite surface when forming a concave embossed part. There is). Therefore, the bulkiness is obtained, and the concave embossing is firmly provided, so that the design property is also high. Further, when the ply structure is adopted, the ply bonding by the concave embossing becomes firm.
  • the crepe paper S1 is placed in the recess 10 by a high local pressure when embossing is applied to the crepe paper S1 that has entered the recess 10 by the characteristic small protrusion group 12 by the small protrusion 12t. Therefore, the ridge line between the adjacent concave embosses formed by the strong pressing portion 11 becomes ambiguous and exhibits a soft design.
  • an embossed small convex portion corresponding to the small convex portion 12t is formed, and therefore, combined with the convex embossing corresponding to the strong pressing portion 11 (the portion corresponding to the concave embossed), the entire paper surface The density of the convex embossing increases, and the surface becomes smooth and bulky.
  • the irregularities cause irregular reflection of light in the portion, and it becomes a calm and high-quality design without being shone. That is, the design is improved by the small convex portions 12t.
  • the plan view shape of the recess 10 is a rounded rectangle, and adjacent to each side of the rounded rectangle of the recess 10.
  • a pattern in which one side of the rounded quadrangular shape of the concave portion to be arranged is close or in contact is desirable.
  • the shape of the concave portion in plan view is preferably a rounded square as shown in the illustrated example. If the shape of the concave portion 10 is a rounded square, the smoothness of the paper surface is further improved.
  • the said recessed part 10 since the said recessed part 10 is regularly arranged in this invention, it becomes the water-decomposable sanitary thin paper X1 which exhibits the outstanding design property by synergy with this.
  • the plan view means a state in which the peripheral surface 1 of the convex embossing roll 60 is developed in a plane and the surface is viewed in plan.
  • the strong pressing portion 11 is a strong pressing portion 11A (mountain strong pressing) composed of mountain-shaped portions surrounded by the four concave portions 10.
  • a strong pressing portion 11B (hereinafter also referred to as a linear strong pressing portion) configured by a line-shaped portion located between the sides of adjacent concave portions.
  • the line-shaped portion 11B is positioned so as to connect the mountain-shaped strong pressing portions.
  • the sides of the concave portion 10 are in contact with each other, and the line-shaped strong pressing portion 11B is a straight line.
  • the distance between the sides of the adjacent recesses 10 is preferably less than 2.0 mm. The transfer of the shape by the mountain-shaped strong pressing portion 11A is ensured.
  • a substantially rectangular solid emboss is formed on the crepe paper surface by the mountain-shaped strong pressing portion 11A, and a linear concave emboss is formed so as to connect them, and the design is excellent.
  • the smoothness and softness of the surface are effectively expressed.
  • the linear strong pressing part 11B draws an arc toward the axial center side of the convex embossing roll 60 with the peak pressing part 11A and the peak pressing part 11 being made. It is desirable to be tied.
  • the linear concave embossing connecting the concave embosses formed by the mountain-shaped strong pressing portions 11A is thinned, and the linear concave embossing only near the four ends of the concave embossing formed by the mountain-shaped strong pressing portions 11A. Embossing is formed and the design is excellent.
  • the top surface 11a comes into contact with and presses the paper surface. It is often transferred to the surface of the paper and becomes a water-degradable sanitary thin paper with excellent design.
  • the top surface is circular, since there are no corners, tearing of the paper during transfer to the paper surface during manufacture (when pressing the paper surface) is prevented.
  • the obtained water-decomposable sanitary thin paper has a smooth surface.
  • the edge 11e is chamfered. There is no risk of tearing as the starting point of the edge portion during production, and the water-decomposable sanitary thin paper has a smooth surface and exhibits a design that gives a soft impression.
  • the area of the concave portion 10 in a plan view is 8 to 12 mm 2 . If it is less than 8 mm 2 , it becomes difficult to form the small convex portion group 12, and the small convex portion group 12 is less likely to exhibit effects such as improvement in the smoothness of the surface, bulkiness, and softness. , 12 mm 2 , the portion other than the concave embossed portion on the paper surface becomes wide, and the design property, bulkiness, softness and the like are not sufficiently exhibited.
  • the recess 10 has a center interval of 3.0 to 5.5 mm. The center interval means the center and the center of gravity of the planar view shape.
  • the water-degradable sanitary thin paper has a high design property. Become.
  • the small convex portion group 12 is configured by regularly arranging 1 to 6 small convex portions 12t (five in the illustrated example), and the small convex portion group 12 is formed in the concave portion 10.
  • a portion where a small concave emboss pushed by the small convex portion 12t is formed also in a portion other than the concave emboss pushed by the strong pressing portion 11A on the paper surface. Since the small concave emboss is formed between the depressed concave embosses, the surface smoothness is improved and the bulk is increased.
  • the protruding direction of the small convex portion 12t is a direction connecting the center of the convex embossing roll 60 and the peripheral surface, that is, a direction perpendicular to the contact surface with respect to the peripheral surface, and the convex direction of the strong pressing portion 11A. Is in the same direction.
  • the height position of the top portion of the small convex portion 12 is a position that is equal to or slightly lower than the height position of the strong pressing portion. This height position means the distance from the axial center of the convex embossing roll 60.
  • the top part of the small convex part 12t is also preferably a plane like the top part of the strong pressing part 11A surrounded by the four concave parts 10, and the area of the top face is particularly 0.2 to 0.5 mm 2 . It is desirable.
  • the planar view shape is preferably an ellipse. If it is this range, the expression of bulkiness and the expression of smoothness by the small convex part group 12 will be exhibited effectively. If the number of the small convex portions 12t constituting the small convex portion group 12 exceeds 6, the concave emboss on the paper surface formed by the strong pressing portion 11A tends to become unclear.
  • the number of small convex portions 12t in the preferred small convex portion group 12 is five as in the illustrated example, and the arrangement is also as in the illustrated example. That is, it is desirable that four of the five have a relationship in which a line connecting the centers or vertices of the top surface draws a square or a square, and the other one is arranged at the center of the drawn square diameter. In this arrangement, the smoothness and bulkiness of the portions corresponding to the recesses 10 are remarkable when transferred to the crepe paper S1.
  • the small convex portion groups 12 are arranged every other length and width as in the illustrated example.
  • the square has an angle of 45 ° with respect to the rounded square of the concave portion 10
  • the small convex portion group 12 is formed at the center of the concave portion 10 in plan view. It is desirable to arrange so that one of the small convex portions to be positioned is located.
  • the design is excellent, and the concave embossing of the paper surface formed by the strong pressing portion 11A of the paper surface becomes firm, and the unevenness due to the small convex portion group 12 is formed on the portion pressed by the concave portion 10. Since it is formed, it is bulky and has a smooth paper surface.
  • the depth of the concave embossing is preferably 300 to 400 ⁇ m. More preferably, it is 350 to 375 ⁇ m. If it is less than 300 ⁇ m, it is difficult to improve the bulkiness, and there is a risk of paper breakage exceeding 400 ⁇ m.
  • the depth of the concave embossing here is measured with a microscope. The numerical value is an average value of the portions passing through two randomly selected embossed portions. In addition, this measurement can be measured, for example, with a KEYENCE microscope.
  • the water-decomposable sanitary thin paper X1 of the present invention is one ply, there is also an effect that there is little difference in the smoothness of each surface of the paper.
  • the water-decomposable sanitary thin paper of the present invention is provided with the characteristic convex embossing roll 6 so that the MMD on the paper surface can be in the range of 0.060 to 0.010.
  • the MMD on at least one surface can be set to 0.080 or less, and it is desirable that it be so.
  • the MMD value exceeds 0.010, the surface is inferior in smoothness. Even if it is less than 0.06, it feels rough.
  • MMD here is the average deviation MMD of the friction coefficient of the 10-mm square piano wire terminal and sanitary thin paper measured on the conditions prescribed
  • the average deviation MMD of the friction coefficient can be measured by using “Friction Tester KES SE” manufactured by Kato Tech Co., Ltd.
  • a larger MMD value means less smoothness.
  • the slipperiness is strong and appropriate wiping properties cannot be obtained.
  • the water-decomposable sanitary thin paper X1 in the present invention preferably has a water-decomposability value of 5 to 20 seconds.
  • the water disintegration here is represented by the number of seconds in the ease test for loosening (based on the test method for ease of loosening defined in JIS P4501).
  • the water disintegration value is less than 5 seconds, when used in a shower toilet or the like, the risk of the loose crepe paper adhering to the skin increases when a wiping operation is performed.
  • the numerical value of 5 to 20 seconds of water disintegration is extremely high water disintegration.
  • the dome shape and arrangement of the recesses 10, the arrangement and shape of the strong pressing portions 11A, and the configuration of the small convex portion group 12 are as follows. This makes it possible to achieve such high water disintegration property even though a solid concave emboss is formed on the paper surface. That is, the achievement of such water disintegration is due to the characteristic embossing of the present invention.
  • the raw material pulp of the water-degradable sanitary thin paper (crepe paper) in the present invention known pulp can be used, for example, wood pulp, waste paper pulp and the like.
  • the raw material pulp is preferably a blend of NBKP (conifer kraft pulp) and LBKP (hardwood kraft pulp).
  • 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 40: 60 is particularly desirable.
  • Papermaking raw materials such as raw material pulp are made into crepe 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 dispersant such as caustic soda, an antifoaming agent, an antiseptic, a slime control agent, a release agent, a softening agent, a soft moisturizing agent, a bulking agent, a dry paper strength agent, a wet strength paper strength agent, Appropriate chemicals such as a yield improver, a dye, and a fixing agent can be added.
  • the convexity having an embossing pattern (patterns shown in FIGS. 7 and 8) that has conventionally been excellent in surface smoothness and little difference between the front and back surfaces and has been suitably used in the field of water-degradable sanitary thin paper.
  • Examples of water-decomposable sanitary thin paper embossed with embossing rolls and water-degradable sanitary thin paper embossed with convex embossing rolls having an embossing pattern according to the present invention (patterns shown in FIGS. 2 to 5)
  • the back surface smoothness and the like were measured and compared.
  • the front and back photograph of each obtained hydrolyzable sanitary thin paper is shown to FIG.
  • FIG. 9 shows an embodiment of the present invention.
  • FIG. 10 is a water-decomposable sanitary thin paper according to a comparative example. 7 and 8, the concave portion is denoted by reference numeral 110, and the portion that is relatively convex with respect to the concave portion is denoted by reference numeral 111.
  • the embossing conditions and the crepe paper used in the examples and comparative examples are the same.
  • smoothness decided to measure MMD according to the above-mentioned measuring method. Details such as the emboss depth are shown in Table 1 below together with the MMD results.
  • MMD in the table is represented by 100 times the measured value.
  • the MMD difference between the front and back surfaces is 5 (0.05) in the conventional one, whereas the MMD difference between the front and back surfaces is 3.6 (0.036) in the present invention. There was no difference and good results were obtained.
  • the present invention having a small convex portion group is obscure and blurry of the rectangular concave embossing and the linear concave embossing connecting the concave embossing, the rectangular embossing is solid, It can be visually recognized that each concave embossed portion as in the comparative example exhibits a unique design that is soft and calm, which is very different from those having clear edges. Moreover, the unevenness
  • the water-decomposable sanitary thin paper provided with the embossing of the present invention is excellent in smoothness, particularly excellent in the smoothness of the back surface, and the difference in smoothness between the front and back surfaces is small. Moreover, it is excellent also in design property.
  • X1 water-degradable sanitary thin paper, 60 ... convex embossing roll, 61 ... peripheral elastic roll, R1 ... raw fabric roll, S1 ... crepe paper (laminated crepe paper), 1 ... peripheral surface of convex embossing roll, 10 ... concave, 11 DESCRIPTION OF SYMBOLS Strong pressing part, 11A ... Mountain-shaped strong pressing part, 11a ... Top surface of mountain-shaped strong pressing part, 11e ... Top surface edge of mountain-shaped strong pressing part, 11B ... Linear strong pressing part, 12 ... Small convex part group , 12t ... small convex part,

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PCT/JP2011/071613 2010-09-30 2011-09-22 水解性衛生薄葉紙及び水解性衛生薄葉紙の製造方法 WO2012043378A1 (ja)

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US20150090414A1 (en) * 2012-05-02 2015-04-02 Kikuo Yamada Method for producing water-disintegrable paper
JP2018047221A (ja) * 2017-06-01 2018-03-29 日本製紙クレシア株式会社 トイレットロール
JP2018047133A (ja) * 2016-09-23 2018-03-29 日本製紙クレシア株式会社 トイレットロール
JP2018108436A (ja) * 2018-03-01 2018-07-12 日本製紙クレシア株式会社 衛生薄葉紙ロール
JP2018108434A (ja) * 2018-03-01 2018-07-12 日本製紙クレシア株式会社 衛生薄葉紙ロール
JP2020175239A (ja) * 2020-07-09 2020-10-29 王子ホールディングス株式会社 トイレットロール
JP2020175212A (ja) * 2020-07-09 2020-10-29 王子ホールディングス株式会社 トイレットロール
JP2020179259A (ja) * 2020-08-04 2020-11-05 王子ホールディングス株式会社 トイレットロール
CN118773955A (zh) * 2024-09-10 2024-10-15 博爱（中国）膨化芯材有限公司 一种压花无尘纸及其制备方法

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US20150090414A1 (en) * 2012-05-02 2015-04-02 Kikuo Yamada Method for producing water-disintegrable paper
US9399841B2 (en) * 2012-05-02 2016-07-26 Kikuo Yamada Method for producing water-disintegrable paper
JP2018047133A (ja) * 2016-09-23 2018-03-29 日本製紙クレシア株式会社 トイレットロール
WO2018055785A1 (ja) * 2016-09-23 2018-03-29 日本製紙クレシア株式会社 トイレットロール
JP2018047221A (ja) * 2017-06-01 2018-03-29 日本製紙クレシア株式会社 トイレットロール
JP2018108434A (ja) * 2018-03-01 2018-07-12 日本製紙クレシア株式会社 衛生薄葉紙ロール
JP2018108436A (ja) * 2018-03-01 2018-07-12 日本製紙クレシア株式会社 衛生薄葉紙ロール
JP2020175239A (ja) * 2020-07-09 2020-10-29 王子ホールディングス株式会社 トイレットロール
JP2020175212A (ja) * 2020-07-09 2020-10-29 王子ホールディングス株式会社 トイレットロール
JP7205521B2 (ja) 2020-07-09 2023-01-17 王子ホールディングス株式会社 トイレットロール
JP2023022306A (ja) * 2020-07-09 2023-02-14 王子ホールディングス株式会社 トイレットロール
JP7416184B2 (ja) 2020-07-09 2024-01-17 王子ホールディングス株式会社 トイレットロール
JP2020179259A (ja) * 2020-08-04 2020-11-05 王子ホールディングス株式会社 トイレットロール
JP7060045B2 (ja) 2020-08-04 2022-04-26 王子ホールディングス株式会社 トイレットロール
CN118773955A (zh) * 2024-09-10 2024-10-15 博爱（中国）膨化芯材有限公司 一种压花无尘纸及其制备方法

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