JP2007135852A - Hygienic tissue paper and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide hygienic tissue paper and its manufacturing method, which improves designedness to bring about further fanciness or high grade quality and is provided with a three-dimensional good appearance. <P>SOLUTION: The hygienic tissue paper has color printing including one or more colors and having gradation including a color tone allowing visual confirmation of the color of base paper. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to sanitary thin paper such as tissue paper, toilet paper, and kitchen paper, and a method for producing the same. More specifically, the present invention relates to a sanitary thin paper on which a pattern print such as a flower or a tree is drawn, and a method for manufacturing the sanitary thin paper.

As this type of sanitary thin paper, there is a sanitary thin paper that provides a design that draws patterns such as flowers and trees and makes the consumer feel gorgeous and high-quality at the time of purchase and use (see, for example, Patent Document 1). .
Such sanitary thin paper is considered to be very attractive because it combines printing of spot patterns such as continuous patterns and floral patterns. However, this sanitary thin paper is a combination of monotonous printing, looks flat, and has a room for improvement as a design that gives a sense of gorgeousness and luxury.
In this regard, in the paper field, it is common to print with one or more colors with gradation (gradation) including the color tone that allows the color of the base paper to be visually recognized, such as printing paper. This is because the surface of the paper to be printed is smooth, so that the printing ink is easily fixed.
However, sanitary thin paper, as will be described later, has been given a crepe-like wrinkle to provide mainly flexibility. When printing, the crease-like crease makes the surface of the paper uneven, and printing It has been difficult to print with one or more colors so that the ink is difficult to fix and has gradation (gradation).
JP 2003-265353 A

  The main problem to be solved by the present invention is to improve the design that gives a sense of gorgeousness and luxury, and is printed with one or more colors so as to have a gradation including a color tone in which the color of the base paper is visually recognized. An object of the present invention is to provide a sanitary thin paper having good appearance and a method for producing the same.

The present invention that has solved this problem is as follows.
[Invention of Claim 1]
It is a sanitary thin paper which is composed of one or more base papers and has pattern printing on at least one paper,
The sanitary thin paper, wherein the pattern printing is made on at least one side by halftone printing.

[Invention of Claim 2]
The sanitary thin paper according to claim 1, wherein the halftone dot printing is 0.1% or more and 99% or less with respect to the total area of the base paper on which the printing is performed.

[Invention of Claim 3]
The sanitary thin paper according to claim 1 or 2, wherein the pattern printing is printed with one or more colors so as to have a gradation including a color tone in which a color of the base paper is visually recognized.

[Invention of Claim 4]
The sanitary thin paper according to any one of claims 1 to 3, wherein a crepe height difference of less than 100 µm is used as the base paper.

[Invention of Claim 5]
The sanitary thin paper according to any one of claims 1 to 4, wherein a crepe rate of 10 to 30% is used as the base paper.

[Invention of Claim 6]
A method for producing sanitary thin paper having pattern printing on at least one side of a base paper,
A method for producing sanitary thin paper, characterized in that a printing means provided with a printing plate having a line number exceeding 50 lines is used for the pattern printing.

[Invention of Claim 7]
The manufacturing method of the sanitary thin paper of Claim 6 using the printing means provided with the anilox roll of the line number exceeding 250 lines for the said pattern printing.

[Invention of Claim 8]
The sanitary thin paper manufacturing method according to claim 6 or 7, wherein the pattern printing is halftone dot printing, and is 0.1% or more and 99% or less with respect to a total area of the base paper on which the printing is performed.

[Invention of Claim 9]
The method for producing sanitary thin paper according to any one of claims 6 to 8, wherein the pattern printing is printed in one or more colors so as to give a gradation including a color tone in which a color of the base paper is visually recognized.

[Invention of Claim 10]
The method for producing sanitary thin paper according to any one of claims 6 to 9, wherein a crepe height difference of less than 100 µm is used as the base paper.

[Invention of Claim 11]
The method for producing sanitary thin paper according to any one of claims 6 to 10, wherein the base paper has a crepe rate of 10 to 30%.

  According to the present invention, the design that gives a sense of gorgeousness and luxury is improved, and the good-looking hygiene that is printed in one or more colors with a gradation (gradation) including a color tone in which the color of the base paper is visually recognized. It becomes a thin paper and its manufacturing method.

Next, an embodiment of the present invention will be described.
[Use]
The use of the sanitary thin paper produced by the present invention is not particularly limited. For example, it can be used as toilet paper, tissue paper, kitchen paper, towel paper, napkin, and the like.

〔Base paper〕
The sanitary thin paper of this embodiment is produced by adding processing such as printing to the base paper.
In this embodiment, the raw material of the base paper is not particularly limited. According to each use such as toilet paper, tissue paper, kitchen paper, towel paper, napkin, and the like, appropriate raw materials such as pulp fibers, films of polyethylene, polyethylene terephthalate, polypropylene, and the like can be used.

  Specifically, for example, when the raw material is a pulp fiber, the pulp fiber (raw pulp) may be wood pulp, non-wood pulp, synthetic pulp, waste paper pulp, or the like, more specifically, groundwood pulp ( GP), Stone Grand Pulp (SGP), Refiner Grand Pulp (RGP), Pressurized Ground Pulp (PGW), Thermomechanical Pulp (TMP), Chemi Thermomechanical Pulp (CTMP), Bleach Chemi Thermomechanical Pulp (BCTMP), etc. Kraft pulp (KP) such as mechanical pulp (MP), chemical mechanical pulp (CGP), semi-chemical pulp (SCP), hardwood bleached kraft pulp (LBKP), softwood bleached kraft pulp (NBKP), soda pulp (AP) , Chemical pulps such as sulfite pulp (SP) and dissolving pulp (DP) ( P), nylon, rayon, polyester, synthetic pulp made from polyvinyl alcohol (PVA), deinked pulp (DIP), waste paper pulp such as waist pulp (WP), ground pulp (TP), cotton, flax, hemp 1 type or several types are appropriately selected from rag pulp, straw pulp, esparto pulp, bagasse pulp, bamboo pulp, kenaf pulp and other auxiliary pulps such as bast pulp, etc. Can be used.

  Raw materials consisting of pulp fibers, for example, are subject to processing such as printing through known paper making processes (stages), specifically, wire parts, press parts, dryer parts, size presses, calendar parts, etc. Can be used as a base paper. For this papermaking, for example, an appropriate chemical agent such as a dispersant, caustic soda, aqueous ammonia and other pH adjusters, antifoaming agents, preservatives, mold release agents, water-proofing agents, flow modifiers, yield improvers, and the like is added. be able to.

[Hygienic thin paper]
The sanitary thin paper 10 of the present embodiment is a halftone dot print in which a large number of halftone dots (dots) d, d... Are printed on the base paper 1 as shown in FIG. Is made by.

  Moreover, what kind of pattern is drawn on the pattern printing 12 is not specifically 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 and satellites such as the moon, sun, stars, etc. Examples include a form drawn by appropriately selecting one or several types from patterns such as a car, an airplane, and an artificial object such as a train.

  However, it is more preferable that the pattern printing 12 is colored by printing on the base paper 1 and that the pattern printing 12 is provided with a gradation (gradation) including a color tone in which the color of the base paper 1 is visually recognized. It becomes.

  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, a pink color in which white is mixed in red and a yellowish green color in which white is mixed in green. A color in which white is mixed (viewed), such as gray in which white is mixed with black.

  In this embodiment, the top shape of each halftone dot d, d... Is not particularly limited. For example, in addition to the rhombus as shown in the drawing, it may be a square, rectangle, circle, ellipse, polygon, star, or the like.

  Moreover, in this embodiment, it is preferable that such halftone printing includes a lotion chemical solution in the ink T used.

  When the lotion chemical is blended with the ink T, a decrease in touch due to the adhesion of the ink T can be suppressed. Therefore, it becomes the sanitary thin paper 10 which has the touch property balanced over the whole.

  In this embodiment, the physical properties of the base paper 1 are such that when toilet paper or tissue paper is used, the longitudinal strength (MDT) of one ply is 75 to 250 gf / 15 mm, and the lateral strength (CDT) is 20 to 100 gf / 15 mm. The longitudinal elongation (MDS) is preferably 5 to 30% (measurement conforms to JIS P 8113).

  On the other hand, when kitchen paper, towel paper or napkin is used, the longitudinal strength (MDT) of one ply is 200 to 1200 gf / 15 mm, the lateral strength (CDT) is 50 to 400 gf / 15 mm, and the longitudinal elongation (MDS). Is preferably 5 to 30% (measurement conforms to JIS P8113).

  If the strength of the base paper 1 is below these lower limit values, breakage or the like may occur during processing such as printing. On the other hand, when the strength of the base paper 1 exceeds these upper limit values, the texture deteriorates. Further, if the elongation of the base paper 1 is below these lower limit values, 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 or the like may occur and fine printing may not be performed.

  In this embodiment, the base paper 1 preferably has a crepe height difference of less than 100 μm, more preferably 10 to 70 μm, and particularly preferably 15 to 40 μm. Since the base paper 1 having a crepe height difference of less than 100 μm has good surface properties, the printing becomes fine and the sanitary thin paper 10 looks three-dimensional and looks good.

  The base paper 1 preferably has a crepe rate of 10 to 30%, more preferably 13 to 23%, and particularly preferably 15 to 19%. Since the base paper 1 having a crepe rate of less than 30% has good surface properties, the printing becomes fine, and the sanitary thin paper 10 looks three-dimensional and looks good. On the other hand, the base paper 1 having a crepe rate of 10% or more is a sanitary thin paper 10 that is soft to the touch and comfortable to use because the paper becomes soft and soft.

  In the present specification, the crepe refers to a crepe-like wrinkle that is applied when the paper is peeled off from a Yankee dryer, a press roll or the like by a doctor.

In this embodiment, the sanitary thin paper 10 is preferably 2 plies or 3 plies when toilet paper or tissue paper is used, and the basis weight according to JIS P 8124 of 1 ply is 10 to 25 g / m ² . Preferably there is. When the basis weight is less than 10 g / m ² , it is preferable in terms of softness, but an appropriate strength cannot be ensured. On the other hand, when the basis weight exceeds 25 g / m ² , it becomes too hard and the touch is deteriorated.

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

  For example, as the moisturizing chemical solution, one or several kinds of polysiloxanes such as silicone oil and silicone powder, polyhydric alcohols such as glycerin and propylene glycol, saccharides such as sorbitol and glucose, glycol-based solvents and derivatives thereof are used. It can be appropriately selected and used.

  Moreover, the above chemical | medical solution can also use together the chemical | medical solution containing vitamin C, vitamin E, collagen, etc., for example. 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 component having a strong reducing power, and has an antioxidant action that eliminates active oxygen and free radicals or prevents the generation of lipid peroxide. Therefore, vitamin E functions as a chemical liquid stabilizer, and exhibits an antioxidative effect on skin sebum and a blood circulation promoting effect. There is also a moisturizing function. Vitamin C, like vitamin E, has a sebum antioxidant effect. Vitamin C has the action of reducing vitamin E. Therefore, when both vitamin C and vitamin E are used, vitamin C works as a supplement to vitamin E and reduces vitamin E oxidized by active oxygen. The action of maintaining the strong sebum antioxidant effect of vitamin E is exhibited. 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 it comes into contact with the skin. Moreover, as a chemical | medical solution, especially when it is made into the weak acidity of pH 5.0-6.0, even if it makes it contact with skin, skin does not become alkalinity, and the rough skin by the influence of chemical | medical solution pH Can be effectively prevented. 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. When the chemical solution is strongly acidic, an aqueous sodium hydroxide solution or an aqueous potassium hydroxide solution can be used. In the case of neutral / alkaline, citric acid, malic acid and lactic acid can be used.

  Examples of the chemical solution for obtaining a refreshing sensation include sorbitol, artitol, xylitol, erythritol, lactitol, and palatinit. Particularly preferred are erythritol, xylitol, and sorbitol, and more preferred are erythritol and xylitol. Furthermore, 1 type, or 2 or more types of cooling sensations chosen from the group of menthol, salicylic acid, (alpha) -cinerol, and these derivatives can also be included.

  A representative example of the softener is a surfactant-type softener, and examples of the softener include anionic surfactants, nonionic surfactants, cationic surfactants, and zwitterionic surfactants. An anionic surfactant is particularly suitable. As the anionic surfactant, carboxylate, sulfonate, sulfate, phosphate, etc. can be used. In particular, alkyl phosphate ester salts are preferred.

  Examples of nonionic surfactants include sorbitan fatty acid esters, diethylene glycol monostearate, diethylene glycol monooleate, glyceryl monostearate, glyceryl monooleate, and polyhydric alcohol monofatty acid esters such as N- (3- Oleiroshiki-2-hydroxypropyl) diethanolamine, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan beeswax, polyoxyethylene sorbitan sesquistearate, polyoxyethylene monooleate, polyoxyethylene monolaurate, polyoxyethylene cetyl ether Polyoxyethylene lauryl ether can be used.

  As the cationic surfactant, a quaternary ammonium salt, an amine salt, an amine, or the like can be used. As the zwitterionic surfactant, aliphatic derivatives of secondary or tertiary amines or heterocyclic secondary or tertiary amines containing carboxy, sulfonate or sulfate are used. be able to.

  As described above, in this sanitary thin paper, various lotion chemicals can be used. In particular, liquid paraffin 5 to 20%, polyhydric alcohols 50 to 85%, sugars 3 to 30%, and further if necessary. For example, it is preferable to use a chemical solution containing 5% or less of a nonionic surfactant as a main ingredient. When the amount of liquid paraffin added is less than 5%, the moist feeling is lowered, and the smoothness is lowered and rough. On the contrary, if it exceeds 20%, it gives a sticky feeling (sticky feeling), and also gives a rough feeling and a harder feeling. A more preferable range is 8 to 15%. In this embodiment, for example, skin oil removal characteristics can be obtained by mixing liquid paraffin without excessively removing the skin oil removal characteristics using polyhydric alcohol as disclosed in JP-A-2-104511. Therefore, a moderate moist feeling can be obtained.

  The amount of polyhydric alcohol added is 50 to 85%. If it is less than 50%, the wiping effect and moist feeling are inferior. If it exceeds 85%, the amount of other components added is decreased, and the balance of the overall characteristics is deteriorated. In addition, the strength is deteriorated, it becomes easy to tear, and gives a sticky feeling. The polyhydric alcohol is particularly preferably composed of glycerin, propylene glycol or a mixture thereof.

  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 saccharides, those composed of sorbitol, glucose or a mixture thereof are particularly suitable.

  Furthermore, 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 monooleate, glyceryl monostearate, glyceryl monooleate, propylene glycol monostearate and other polyhydric alcohol monofatty acid esters, N- (3-oleoxy -2-hydroxypropyl) diethanolamine, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbit beeswax, polyoxyethylene sorbitan sesquistearate, polyoxyethylene monooleate, polyoxyethylene sorbitan sesquistearate, polyoxyethylene glyceryl mono Oleate, polyoxyethylene monostearate, polyoxyethylene monolaurate, polyoxyethylene monooleate, poly Carboxymethyl ethylene cetyl ether, and polyoxyethylene lauryl ether.

  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.

[Manufacturing method of sanitary thin paper]
In manufacturing the sanitary thin paper 10 of this embodiment, the pattern printing 12 is colored by printing on the base paper 1 as shown in FIG.

  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 planographic printing such as offset printing can be employed.

  However, as shown in FIG. 2, for this printing, printing means 5 provided with an anilox roll 4 of more than 250 lines, preferably more than 250 lines and 1000 lines or less, more preferably 300 lines or more and 600 lines or less is used. Is preferred. If the printing means 5 provided with the anilox roll 4 having more than 250 lines is used for this printing, fine printing can be performed. Therefore, the sanitary thin paper 10 with better appearance can be manufactured. Further, when the printing means 5 having the anilox roll 4 exceeding 250 lines is used for this printing, the transfer amount of the ink T onto the base paper 1 is reduced. Therefore, even if the pattern printing 12 is colored by printing on the base paper 1 and, as a result, the water disintegrability of the sanitary thin paper 10 is decreased, the decrease in water disintegration is suppressed to a minimum.

  In addition, the code | symbol 2 in the printing means 5 of this form is a printing plate roll. Reference numeral 3 facing the plate roll 2 and the base paper 1 is a pressure roll. Incidentally, the number of “lines” of the anilox roll 4 and the printing plate roll 2 means the number of halftone dots (dots) per inch (2.54 cm).

  In this embodiment, it is preferable not to perform printing by the printing means 5 in the pattern printing periphery 13. If the printing means 5 provided with the anilox roll 4 having more than 250 lines is used for the main printing, as described above, the transfer amount of the ink T to the base paper 1 is reduced, so that the degradation of water disintegration can be suppressed. , The color becomes lighter. However, the printing plate roll 2 exceeding 50 lines is used in combination, and the pattern printing 12 is halftone printing. 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 that the color becomes light can be solved. As another method, the top area of the halftone dots, 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 addition, as described above, the effect of non-printing around the pattern printing periphery 13 also has an effect that the pattern printing 12 becomes conspicuous. When printing with gradation (gradation) is performed as a synergistic effect, the pattern printing 12 Looks more three-dimensional and looks great. However, this effect is exhibited regardless of what the printing means 5 is, that is, regardless of whether the anilox roll 4 having more than 250 lines is provided. Attention is required.

  Rather, it is important to provide a printing plate roll having more than 50 lines, and preferably having a printing plate roll having more than 50 lines and 200 lines or less, more preferably 65 lines or more and 150 lines or less.

  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 due to dust-like wrinkles. Due to the unevenness, for example, a problem occurs in that the convex portion is printed but the concave portion is not printed, and the printing itself becomes a striped pattern, so that continuous gradation (gradation) is difficult to occur.

  Here, in the manufacturing method of the sanitary thin paper 10, it is more preferable that the pattern printing 12 is also colored by printing on the base paper 1 and printed so as to have a gradation (gradation) including a color tone in which the color of the base paper 1 is visually recognized. It will be a thing.

  When the printing means 5 provided with the anilox roll 4 having more than 250 lines is used for the main printing, as described above, the transfer amount of the ink T to the base paper 1 is reduced, so that the degradation of water disintegration can be suppressed. Becomes thinner. However, if a tone including a color tone in which the color of the base paper 1 is visually recognized is given, other color tone becomes conspicuous in relation to the color tone in which the color of the base paper 1 is visually recognized, and thus the user has a light color tone. Thus, the sanitary thin paper 10 having a good appearance can be obtained.

  Note that the effect of gradation printing also has the effect of improving the appearance of a three-dimensional appearance without giving the user a sense of incongruity, as described above. However, this effect is exhibited regardless of what the printing means 5 is, that is, regardless of whether the anilox roll 4 having more than 250 lines is provided. Attention is required.

  Further, in the method for manufacturing 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. 3, the anilox roll 14 and the printing plate roll 2 are separate from the printing plate roll. 15 is prepared. First, the first color printed on the anilox roll 4 and the printing plate roll 2 is printed on the base paper, and then the second color is printed on the anilox roll 14 and the printing plate roll 15. Furthermore, when printing with three or more colors, the anilox roll and the plate roll may be increased, and the pressure roll may be increased accordingly. In addition, the code | symbol 6 in a figure is a pan (ink tank).

Next, examples of the present invention will be described.
Sensory evaluation with 50 evaluators (appearance, feel, and overall evaluation) by changing the number of printing plate rolls, anilox rolls, base paper crepe height difference, crepe rate, and presence / absence of lotion chemical in ink ) The conditions and results are shown in Table 1.
In addition, regarding “look” and “feel”, a five-step evaluation was performed, where 5 was given as the best feeling, 5 was sequentially reduced, and 1 was given as the worst feeling. On the other hand, for “Comprehensive Evaluation”, ◎ if you feel very good, ○ if you feel good, △ if you feel normal, × if you feel bad, × if you feel very bad It was set to 5 grade evaluation made into x.

  The present invention improves the design that gives a sense of gorgeousness and luxury, and is printed with one or more colors so as to have a gradation (gradation) including a color tone in which the color of the base paper is visually recognized. It can be applied as sanitary thin paper such as toilet paper and a manufacturing method thereof.

It is a partial top view of a sanitary thin paper. It is a figure for demonstrating the manufacturing method of a sanitary thin paper. It is a figure for demonstrating the manufacturing method of a sanitary thin paper.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Base paper, 2 ... Plate roll, 3 ... Pressure roll, 4 ... Anilox roll, 5 ... Printing means, 6 ... Pan (ink tank), 10 ... Sanitary thin paper, 12 ... Pattern printing, 13 ... Pattern printing peripheral part, 14 ... Anilox roll, 15 ... Plate roll, d ... Halftone dot, T ... Ink.

Claims (11)

It is a sanitary thin paper which is composed of one or more base papers and has pattern printing on at least one paper,
The sanitary thin paper, wherein the pattern printing is made on at least one side by halftone printing.   The sanitary thin paper according to claim 1, wherein the halftone dot printing is 0.1% or more and 99% or less with respect to the total area of the base paper on which the printing is performed.   The sanitary thin paper according to claim 1 or 2, wherein the pattern printing is printed with one or more colors so as to have a gradation including a color tone in which a color of the base paper is visually recognized.   The sanitary thin paper according to any one of claims 1 to 3, wherein a crepe height difference of less than 100 µm is used as the base paper.   The sanitary thin paper according to any one of claims 1 to 4, wherein a crepe rate of 10 to 30% is used as the base paper. A method for producing sanitary thin paper having pattern printing on at least one side of a base paper,
A method for producing sanitary thin paper, characterized in that a printing means provided with a plate roll having a line number exceeding 50 lines is used for the pattern printing.   The manufacturing method of the sanitary thin paper of Claim 6 using the printing means provided with the anilox roll of the line number exceeding 250 lines for the said pattern printing.   The sanitary thin paper manufacturing method according to claim 6 or 7, wherein the pattern printing is halftone dot printing, and is 0.1% or more and 99% or less with respect to a total area of the base paper on which the printing is performed.   The method for producing sanitary thin paper according to any one of claims 6 to 8, wherein the pattern printing is printed in one or more colors so as to give a gradation including a color tone in which a color of the base paper is visually recognized.   The method for producing sanitary thin paper according to any one of claims 6 to 9, wherein a crepe height difference of less than 100 µm is used as the base paper.   The method for producing sanitary thin paper according to any one of claims 6 to 10, wherein the base paper has a crepe rate of 10 to 30%.

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