WO2007058289A1 - Sanitary tissue paper - Google Patents

Abstract

[PROBLEMS] To provide a sanitary tissue paper of high visual quality. [MEANS FOR SOLVING PROBLEMS] There is provided a sanitary tissue paper comprising colored substratum (11) and pattern elements (12). The coloring of the substratum (11) is performed by printing on raw paper (1), and the printing is avoided around the pattern elements (12).

Description

 Sanitary tissue paper

 Technical field

 [0001] The present invention relates to sanitary thin paper such as tissue paper and toilet paper. More specifically, the present invention relates to a sanitary thin paper having a base portion colored in blue or pink and a pattern portion on which a pattern such as a flower or a tree is drawn.

 Background art

 [0002] Examples of this type of sanitary thin paper include those that have been colored in a strip shape or a wave shape by a spray nozzle in the papermaking stage (see, for example, Patent Document 1).

 [0003] This sanitary thin paper has a clean feeling and is also required to coordinate with the fragrance. However, this sanitary thin paper has a poor design and also gives a sense of incongruity to the user because the raw pulp is colored in strips and undulations along the width of the paper at the paper making stage. The power and doubts are being raised, which can be said to be very attractive.

 Patent Document 1: Japanese Patent Laid-Open No. 2003-310476

 Disclosure of the invention

 Problems to be solved by the invention

[0004] The main problem to be solved by the present invention is to provide a sanitary thin paper that has a good design and has a good appearance.

 Means for solving the problem

[0005] The present invention that has solved this problem is as follows.

 [Invention of Claim 1]

 A sanitary thin paper having a colored base portion and a pattern portion,

 The sanitary thin paper is characterized in that the base portion is colored by printing on the base paper, and this printing is not performed around the pattern portion.

[0006] [Invention of claim 2]

The pattern portion is also colored by printing on the base paper, [0007] The sanitary thin paper according to claim 1, wherein at least one of the base portion and the pattern portion has a tone including a color tone in which a color of the base paper is visually recognized!

[Invention of claim 3]

 The sanitary thin paper according to claim 1 or 2, wherein at least the base portion is colored by halftone printing on the base paper.

[0009] [Invention of claim 4]

 The sanitary thin paper according to any one of claims 1 to 3, wherein a lotion chemical is mixed in the ink used for the printing.

 The invention's effect

 [0010] According to the present invention, a sanitary thin paper having a good appearance is obtained.

 BEST MODE FOR CARRYING OUT THE INVENTION

 Next, an embodiment of the present invention will be described.

 [Use]

 The use of the sanitary thin paper of the present invention is not particularly limited. For example, it can be used as toilet paper, tissue paper, kitchen paper, towel paper, and napkins.

 [0012] [Base paper]

 The sanitary thin paper of this form is manufactured by applying processing such as printing to the base paper.

 In this embodiment, the raw material of the base paper is not particularly limited. Appropriate raw materials such as pulp fibers, films of polyethylene, polyethylene terephthalate, polypropylene, etc. can be used according to the respective applications such as toilet paper, tissue paper, kitchen paper, towel paper, and napkins.

[0013] Specifically, for example, when the raw material is pulp fiber, the pulp fiber (raw material pulp) is more concretely selected from wood pulp, non-wood pulp, synthetic pulp, waste paper pulp, and the like. Is groundwood norp (GP), stone ground pulp (SGP), refiner ground pulp (RGP), pressurized ground wood pulp (PGW), thermomechanical pulp (TMP), chemi thermomechanical pulp (CTMP), bleach chemi thermogram power -Carpulp (BCTMP) Kraft pulp (KP), such as mechanical pulp (MP), chemical mechanical pulp (CGP), semi-heological pulp (SCP), hardwood bleached kraft pulp (LBKP), softwood bleached kraft pulp (NBKP), etc. Synthetic pulp and deinked pulp made from chemical pulp (CP) such as soda pulp (AP), sulfite pulp (SP), dissolved pulp (DP), nylon, rayon, polyester, polybulal alcohol (PVA), etc. (DIP), waste pulp such as West Pulp (WP), ground pulp (TP), cotton, flax, hemp, jute, manila hemp, ramie, etc. Raw pulp, straw pulp, esbalt pulp, bagasse pulp, bamboo One or several types of auxiliary pulps such as pulp, kenaf pulp, and other auxiliary pulps such as bract pulp can be selected and used.

 [0014] The raw material having the same strength as the pulp fiber is, for example, a known papermaking process (stage), specifically, a wire part, a press part, a dryer part, a size press, a calendar part, etc. It can be a base paper to be processed. When making this paper, add appropriate chemicals such as pH adjusters such as dispersants, caustic soda, and aqueous ammonia, antifoaming agents, preservatives, mold release agents, water resistance agents, flow modifiers, and yield improvers. can do.

 [0015] However, the base paper of this embodiment is not colored with a dye or the like during the paper making stage.

 [0016] Hygienic thin paper

 As shown in FIG. 1, the sanitary thin paper 10 of this embodiment has a base portion 11 colored in blue or pink, and a pattern portion 12 on which a pattern such as a flower or a tree is drawn. The base portion 11 is colored by printing on the base paper 1 (see FIG. 2), and this printing is performed around the pattern portion 12 (also simply referred to as “extracted portion”) 13. It has been made cunning.

 [0017] When the pattern portion periphery 13 is printed (colored), the pattern portion 12 has a noticeable appearance. In this regard, if the base paper 1 is colored at the paper making stage, the pattern area periphery 13 will also be colored.Therefore, strong non-printing is done by printing the base part 11 by printing on the base paper 1. This is possible for the first time.

[0018] In this embodiment, the color of the base portion 11 is not particularly limited. For example, one or several types are appropriately selected from red, blue, yellow, green, pink, purple, etc. The colored form can be illustrated.

 In addition, the force with which any pattern is drawn on the pattern portion 12 is not particularly limited. For example, plants such as flowers, trees, grass, creatures such as people, animals, fish, shellfish, insects, nature such as mountains, rivers, seas, clouds, forests, forests, planets such as moons, suns, stars Examples of forms drawn by selecting one or several types from among various patterns such as cars, airplanes, trains, etc.

[0020] However, the pattern portion 12 is also colored by printing on the base paper 1, and at least one of the base portion 1 1 and the pattern portion 12, preferably both, is a tone including a color tone in which the color of the base paper 1 is visually recognized. When (gradient) is added, it is more preferable!

 [0021] If at least one of the base portion 11 and the pattern portion 12 has a gradation including a color tone that allows the color of the base paper 1 to be visually recognized, the appearance is good without giving the user a sense of incongruity (for example, red The use of a solid color such as color or blue may give the user a sense of incongruity when using it as toilet paper, etc.) o In this regard, if the base paper 1 is colored at the paper making stage Then, since there is no color tone in which the (original) color of the base paper 1 can be visually recognized, the vivid gradation printing is performed by printing the base portion 11 by printing on the base paper 1. In some cases, this is possible for the first time.

 [0022] In this specification, "the color tone in which the color of the base paper 1 is visually recognized" means, for example, when the base paper 1 is white, pink mixed with red and white, and white mixed with green. This is a color in which white is mixed (visible), such as yellowish green, gray in which black is mixed with white.

 [0023] The sanitary thin paper 10 of the present embodiment has a large number of colorings on the base paper 1 as shown in an enlarged view in FIG. It is preferable to use halftone printing by printing halftone dots (dots) d, d.

 [0024] If coloring of the base portion 11 or the like is performed by halftone printing on the base paper 1, the amount of ink T (see Fig. 2) attached (used amount) decreases. Therefore, even if the amount of ink T attached is increased compared to the case where the base paper 1 is colored by printing on the base paper 1, that is, the base paper 1 is colored at the paper making stage, the increase is increased. The amount is kept to a minimum, and it becomes an inexpensive sanitary thin paper with excellent touch.

[0025] In the present embodiment, the shape of each halftone dot d, d ... is not particularly limited. For example, In addition to the diamond shape, it can be a square, rectangle, circle, ellipse, polygon, star, or the like.

 [0026] In this embodiment, it is preferable that lotion chemical is mixed with the ink T to be used, regardless of whether the powerful printing is halftone printing or not! /.

[0027] When the lotion chemical is mixed with the ink T, a decrease in touch due to the adhesion of the ink T can be suppressed. Therefore, the sanitary thin paper 10 has a balanced feel throughout.

 [0028] In this embodiment, the physical properties of the base paper 1 are as follows. When toilet paper or tissue paper is used, the longitudinal strength (MDT) of 1 ply is 75 to 250gfZl5mm, and the lateral strength (CDT) is 20 to 100gfZl5mm. The elongation (MDS) is preferably 10 to 30% (measured according to IS P 8113).

[0029] On the other hand, when using kitchen paper, towel paper or a napkin, the longitudinal strength (MDT) of the plastic is 00 to 1200 ₈ 715! 11111, the lateral strength (CDT) is 0 to 400 gfZl 5 mm, The longitudinal elongation (MDS) is preferably from 5 to 30% (measured according to ί and IS P 8113).

 [0030] Strength of base paper 1 If these lower limit values are not reached, breakage or the like may occur during processing such as printing. On the other hand, the strength of the base paper 1 If these upper limits are exceeded, the texture deteriorates. Further, if the elongation of the base paper 1 is below these lower limits, breakage or the like may occur during processing such as printing. On the other hand, if the elongation of the base paper 1 exceeds these upper limit values, wrinkles may occur and fine printing may not be possible.

 In this embodiment, the base paper 1 preferably has a crepe height difference of less than 100 μm, more preferably 10 to 70 / ζ πι, and more preferably 15 to 40 / ζ πι. Is particularly preferred. Crepe Base paper 1 with a height difference of less than 100 m has good surface properties, so the printing becomes fine and the sanitary thin paper 10 looks good.

[0032] The base paper 1 has a crepe rate of preferably 10 to 30%, more preferably 13 to 23%, and even more preferably 15 to 19%. The base paper 1 having a crepe rate of less than 30% has a surface property, so that the printing becomes fine and the sanitary thin paper 10 looks good. On the other hand, the base paper 1 with a crepe rate of 10% or more has a softer paper quality due to the softness of the paper. It is easy to use, comfortable, and sanitary thin paper 10.

 In the present specification, the term “crepe” refers to a crepe-shaped crease that is attached when the paper is peeled off from a Yankee dryer, a press roll or the like by a doctor.

[0034] In this embodiment, when the sanitary thin paper 10 is used for toilet paper or tissue paper, it is preferable to use 2 plies or 3 plies, and the basis weight according to JIS P 8124 of 1 ply is 10 to It is preferably 25 g / m ² . When the basis weight is less than 10 g / m ² , it is preferable in terms of softness, but it becomes impossible to ensure an appropriate strength. On the other hand, if the basis weight exceeds 25 gZm ² , it becomes too hard and the touch becomes worse.

 [0035] (Lotion solution)

 In the present specification, the lotion chemical solution is mainly intended to increase the touch (texture), moisturize, relieve irritation to the skin of the pulp fiber, or increase the moisturizing feeling. The type is not particularly limited.

 [0036] For example, the moisturizing chemical solution includes silicone oleore, polysiloxane such as silicone powder, polyhydric alcohols such as glycerin and propylene glycol, saccharides such as sorbitol and dalcose, glycol solvents, and derivatives thereof. One or several types can be selected and used as appropriate.

[0037] In addition, a chemical solution containing, for example, vitamin C, vitamin E, collagen and the like can be used in combination with the above chemical solution. This type of chemical has a function to enhance the feeling of moisture. Vitamin C and vitamin E also function as antioxidants. Vitamin E is a highly reducing component and has an anti-acid effect that eliminates active oxygen free radicals or prevents the formation of peracid lipids. Therefore, vitamin E functions as a chemical stabilizer, and also exhibits an effect of preventing the sebum from being oxidized and promoting blood circulation. There is also a moisturizing function. Vitamin C, like Vitamin E, has the anti-oxidative action of sebum. Vitamin C has the action of reducing vitamin E. Therefore, when both vitamin C and vitamin E are used, vitamin C works as an auxiliary to vitamin E and is oxidized by active oxygen. It reduces the amount of vitamin E and maintains the antioxidant effect of vitamin E's strong sebum. Collagen forms 90% of the dermis of the skin, and when this decreases, the skin loses moisture and tension. Therefore, it exhibits a moisturizing effect that moisturizes the skin when in contact with the skin. In addition, as a chemical solution, especially pH 5. If the acidity is from 0 to 6.0, the chemical solution that does not cause the skin to become alkaline even when brought into contact with the skin can effectively prevent rough skin due to the influence of pH. A particularly preferred pH range is 5.3 to 5.7. The pH can be adjusted by adding an acidic or basic pH adjuster to the chemical solution. If the chemical solution is strongly acidic, use a sodium hydroxide aqueous solution or a potassium hydroxide aqueous solution. When the chemical solution is neutral and alkaline, citrate, malic acid and lactic acid can be used.

[0038] Examples of the chemical solution for obtaining a refreshing sensation include sorbitol, artitol, xylitol, erythritol, latathitol, and noratinite. Particularly preferred are erythritol, xylitol and sorbitol, and more preferred are erythritol and xylitol. Further, menthol, salicylic acid, a-cinerol and the group strength of these derivatives may contain one or more selected cooling agents.

[0039] A typical example of a softener is a surfactant-type softener, and examples of the softener include an anionic surfactant, a nonionic surfactant, a cationic surfactant, and a zwitterionic surface activity. An anionic surfactant is particularly preferable. As the anionic surfactant, carboxylate, sulfonate, sulfate ester, phosphate ester, and the like can be used. In particular, alkyl phosphate ester salts are preferred.

 [0040] Nonionic surfactants include polyalcohol monofatty acids such as sorbitan fatty acid esters, diethylene glycol monostearate, diethylene glycol monosoleate, glyceryl monostearate, glyceryl monostearate, and propylene glycol monostearate. Esters, N- (3-oleyloxy 2-hydroxypropyl) diethanolamine, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbite dense wax, polyoxyethylene sonolebitane sesquistearate, polyoxyethylene monooleate, polyoxyethylene Monolaurate, polyoxyethylene cetyl ether, polyoxyethylene lauryl ether, etc. can be used.

[0041] As the cationic surfactant, a quaternary ammonium salt, an amine salt, an amine, or the like can be used. Zwitterionic surfactants include canolepoxy and sulfonate. Further, aliphatic derivatives of secondary or tertiary amines containing a sulfate or aliphatic derivatives of heterocyclic secondary or tertiary amines can be used.

[0042] As described above, in this sanitary thin paper, various lotion chemicals can be used. 1S Especially, liquid paraffin 5-20%, polyhydric alcohols 50-85%, sugars 3-30%, If necessary, it is preferable to use a chemical solution containing 5% or less of a nonionic surfactant as a main ingredient. If the amount of liquid paraffin added is less than 5%, the moist feeling is lowered, and the smoothness is lowered and rough. Conversely, if it exceeds 20%, it gives a sticky feeling (stickiness), and also becomes rough and harder. A more preferred range is 8-15%. In this embodiment, for example, as shown in Japanese Patent Laid-Open No. 2-104511, skin oil removal characteristics can be improved by mixing liquid paraffin without excessively removing the skin oil removal characteristics with polyhydric alcohol. Because it is suppressed, you can get a good moist feeling.

 [0043] The amount of added force of the polyhydric alcohols is set to 50 to 85%. If it is less than 50%, the wiping effect and the feeling of wiping are poor. If it exceeds 85%, the amount of other components added will decrease, and the balance of the overall characteristics will deteriorate. In addition, the strength deteriorates, it becomes easy to tear, and it gives a sticky feeling. The polyhydric alcohols are preferably composed of glycerin or propylene glycol or a mixture thereof! /.

 [0044] The amount of saccharide added is 3 to 30%. If it is less than 3%, the moist feeling and softness are lowered, and if it exceeds 30%, the balance of the overall characteristics is deteriorated, the strength is deteriorated, and it is easily broken. As the saccharide, those having sorbitol or glucose or a mixture thereof are particularly suitable.

[0045] If necessary, 5% or less of a nonionic surfactant can be added. Nonionic active agents include sorbitan fatty acid esters, diethylene glycol monostearate, diethylene glycol monostearate, glyceryl monostearate, glyceryl monostearate, polyhydric alcohol mono fatty acid esters such as propylene glycol monostearate, N- (3-Oleyloxy-2-hydroxypropyl) diethanolamine, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbit beeswax, polyoxyethylene sorbitan sesquistearate, polyoxyethylene monooleate, polyoxyethylene sorbitan Examples include sesquistearate, polyoxyethylene glyceryl monooleate, polyoxyethylene monostearate, polyoxyethylene monolaurate, polyoxyethylene monooleate, polyoxyethylene cetyl ether, polyoxyethylene lauryl ether, etc. That's right.

 [0046] Secondary additives such as anionic surfactants, fragrances, coloring agents, preservatives, and antioxidants can be added to these chemicals at a ratio of 1% or less.

 [0047] [Method for producing sanitary thin paper]

 In manufacturing the sanitary thin paper 10 of this embodiment, the base 11 is colored by printing on the base paper 1 as shown in FIG. If the base 11 is colored by printing on the base paper 1, it is easy to change the color of the base paper 1 only by changing the color of the ink T. In addition, since the color of the base paper 1 can be confirmed immediately, the color of the base paper 1 can be easily matched.

 At this time, the printing method for the base paper 1 is not particularly limited. For example, relief printing such as flexographic printing, intaglio printing such as gravure printing, and lithographic printing such as offset printing can be employed.

 [0049] However, as shown in FIG. 2, for this printing, printing means 5 provided with an arlock roll 4 having a number of lines exceeding 250 lines, preferably 350 lines or more, more preferably 400 lines or more is used. Is preferred. If the printing means 5 provided with the arrox roll 4 having more than 250 lines is used for this printing, fine printing is possible. Therefore, it is possible to produce sanitary thin paper 10 that looks better. In addition, if the printing means 5 provided with the arlock roll 4 having more than 250 lines is used for this printing, the transfer amount of the ink T onto the base paper 1 is reduced. Therefore, the base 11 is colored by printing on the base paper 1, that is, the amount of ink T used is increased as compared with the case where the base paper 1 is colored at the paper making stage. Even if the water disintegrability of the thin paper 10 decreases, the decrease in water disintegration can be minimized.

Note that reference numeral 2 in the printing unit 5 of the present embodiment is a printing plate roll. Further, a reference numeral 3 facing the plate plate 2 and the base paper 1 is a pressure roll. The number of “lines” on the Anilox roll 4 means the number of halftone dots per inch (2.54 cm). In this embodiment, printing by the printing unit 5 is not performed around the pattern portion periphery 13. If printing means 5 with more than 250 lines of arrox rolls 4 is used for this printing, as described above, the transfer amount of ink T to base paper 1 will decrease, so the water disintegration will not be reduced. Suppressing power At the same time, the color becomes lighter. However, if this printing is not performed around the pattern area 13 (non-printing), the coloring (11) of the base paper 1 that will be contrasted with the pattern (12) will become noticeable. Good looking sanitary tissue 10 is obtained. The printing plate roll 2 that exceeds 50 lines is used together, and the pattern 12 is halftone printed.For example, by changing the top area of the halftone dots, that is, the printing area, with the same number of lines, gradation is added. Can be printed and the problem of faint colors can be solved. As another method, the top area of the halftone dot, that is, the printing area can be made the same, and the number of lines can be changed, and these two methods can be used together. In this regard, when the raw pulp is colored at the paper making stage, the base paper 1 is also colored around the pattern portion 13, so such non-printing is performed by coloring the base portion 11 by printing on the base paper 1. It will be possible for the first time.

 It should be noted that this non-printing effect around the pattern portion periphery 13 also has an effect that the pattern portion 12 becomes conspicuous as described above. However, this effect can be exerted regardless of what the printing means 5 is, that is, whether or not the arlock roll 4 having more than 250 lines is provided. It should be noted that this is what is demonstrated.

 [0053] Rather, it is important to provide a plate roll having more than 50 lines, and preferably to have a plate roll having more than 50 lines and 200 lines or less, more preferably 65 lines or more and 150 lines or less. The

 [0054] Further, as described above, the base paper 1 of the sanitary thin paper 10 is provided with a crepe in which the surface of the paper becomes uneven by a crepe-like crease. Due to the unevenness, for example, a force that is printed on the convex portion causes a problem that the concave portion is not printed, and the printing itself becomes a striped pattern, and the continuous gradation (gradation) hardly occurs.

 [0055] In order to eliminate this point, for the reasons described above, the height difference between the top of the convex portion and the bottom of the concave portion needs to be less than 100 μm, and the crepe rate needs to be 10 to 30%.

Here, in the manufacturing method of the sanitary thin paper 10, the pattern portion 12 is also marked on the base paper 1. When coloring by printing and printing at least one of the base portion 11 and the pattern portion 12 and preferably both so as to have a gradation (gradation) including the color tone in which the color of the base paper 1 is visually recognized, It becomes more preferable.

 [0057] When the printing means 5 provided with the arrox roll 4 having more than 250 lines is used for the main printing, as described above, the transfer amount of the ink T onto the base paper 1 is reduced, so that the water disintegration is deteriorated. Is the power to be suppressed. However, if at least one of the base part 11 and the pattern part 12 has a tone including a color tone in which the color of the base paper 1 is visually recognized, other colors are related to the color tone in which the color of the base paper 1 is visually recognized. Since the color tone becomes conspicuous, the user is not given the impression that the color is light, and the sanitary thin paper 10 having a good appearance can be obtained. In this regard, if the raw material pulp is colored once in the papermaking stage, there will be no color tone in which the (original) color of the base paper 1 can be visually recognized. Is possible only when printing is performed on base paper 1.

 Note that the effect of gradation printing also has the effect of improving the appearance without giving the user a sense of incongruity, as described above. However, this effect can be exerted regardless of what the printing means 5 is, that is, whether or not the arlock roll 4 having more than 250 lines is provided. It should be noted that this is what is demonstrated.

 [0059] Further, in the manufacturing method of the sanitary thin paper 10, printing of two or more colors is possible. For example, in the case of two colors, as shown in FIG. And a separate printing plate roll 15, and first prints the first color of the base paper 1 with the Arox roll 4 and the printing plate roll 2, and then the second color with the Arox roll 14 and the printing plate roll 15. You can do that. In addition, when printing with more than three colors, it is sufficient to increase the number of rolls and plate rolls and the number of pressure rolls accordingly. In the figure, reference numeral 6 denotes a pan (ink tank).

 Example 1

 [0060] Next, examples of the present invention will be described.

Coloring method of the background part 'Presence / absence of gradation' Presence / absence of halftone dot and presence / absence of gradation of pattern part 'Sensory evaluation with 50 evaluators by changing the presence / absence of halftone dot and surrounding printing The design (pattern) kibachichi (overall evaluation) was conducted. The conditions and results are shown in Table 1. [0061] Regarding the “look” and “design” borders, a five-point scale was used, with 5 being the best feeling, 1 in descending order, and 1 being the worst. On the other hand, with regard to the “comprehensive evaluation”, ◎ if it feels very good, △ if it feels good, △ if it feels normal, X if it feels bad, and if it feels very bad A five-point scale was used, where XX is XX.

[0062] [Table 1]

[0063] The present invention is applicable as sanitary thin paper such as tissue paper or toilet paper having a base portion colored in blue or pink and a pattern portion on which a pattern such as a flower or a tree is drawn. It is.

 Brief Description of Drawings

 FIG. 1 is a partial plan view of a sanitary thin paper.

 FIG. 2 is a diagram for explaining a method for producing sanitary thin paper.

 FIG. 3 is a diagram for explaining a method for producing sanitary thin paper.

 Explanation of symbols

 [0065] 1 ······························································································································· Ink ), 10 ... Sanitary thin paper, 11 ... Base part, 12 ... Pattern part, 13 ... Extraction part, 14 ... Arox roll, 15 ... Plate roll, d ... Halftone dot, Τ ... Ink.

Claims

The scope of the claims  [1] A sanitary thin paper having a colored base portion and a pattern portion,  The sanitary thin paper is characterized in that the base portion is colored by printing on the base paper, and this printing is not performed around the pattern portion.  [2] The pattern portion is also colored by printing on the base paper,  2. The sanitary thin paper according to claim 1, wherein at least one of the base portion and the pattern portion has a tone including a color tone in which a color of the base paper is visually recognized! [3] At least the base portion is colored by halftone printing on the base paper. The sanitary thin paper according to claim 1 or claim 2. [4] The sanitary thin paper according to any one of claims 1 to 3, wherein a lotion chemical is mixed with the ink used for the printing.