JP2019163082A - Tissue paper storage body - Google Patents

Abstract

To provide a tissue paper storage body which is excellent at printability on the exterior surface of the tissue paper storage box and abrasion and paper powder suppression between sheets of tissue paper and between a tissue paper bundle and the storage box, and of which the storage box is not easy to be crushed.SOLUTION: A storage box 10 is made by assembling multiply-formed base paper for paper packaging container of a basis weight of 250 g/m-350 g/mand density of 0.77-0.90 g/cmconsisting of a surface layer, a surface under layer and at least one middle layer and/or back layer. The base paper for paper packaging container has a surface layer and a surface under layer made of mixed kraft pulp and used-paper pulp, on the middle layer and the back layer used-paper pulp from used-paper including mechanical pulp is used. In the mixed kraft pulp, needle-leaved tree bleached kraft pulp/broad-leafed tree bleached kraft pulp are of a mixing ratio of 40:60-60:40 and the compression strength of the length direction of the base paper for paper packaging container is 650 to 800 N.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tissue paper storage body in which a bundle of tissue paper is stored in a tissue paper storage box.

  A tissue paper used to store a bundle of tissue paper in a paper storage box and pull it out in a pop-up manner from an outlet provided on the upper surface of the storage box (also called a carton box or carton). The container is known.

  The tissue paper storage box in the tissue paper storage body has conventionally used coated white cardboard (also called white coated balls, white balls, or coated balls, hereinafter referred to as coated balls) in which a white layer on one side is coated with a coating agent. ing.

  The coated balls used in tissue paper storage boxes are mainly made of used paper raw materials, but have a coating layer with multiple coatings on the printing surface to ensure high-definition printability. It was thick, heavy and hard.

  Therefore, the conventional tissue paper storage body has a heavy product weight including the cargo material, and the tissue paper storage box, which is the outer shell, may be crushed during loading or transportation. Further, since the coating layer is thick, the air permeability is low, the moisture absorption of the web that has absorbed moisture is slow, the strength of the storage box tends to be lowered during lamination in the warehouse, and the box is easily crushed especially in a high humidity environment. Furthermore, when folding tissue paper box from carton base paper, there is a lack of folding accuracy, such as ruled cracks, at the ridge line between each surface, and the part with low folding accuracy is the above It could be the starting point of box collapse.

  On the other hand, the tissue paper storage body may generate paper dust by rubbing the internal tissue paper bundle or the tissue paper to be taken out and the storage box during transportation or use. Therefore, the tissue paper storage body is required to be excellent in tissue paper bundles, scratch resistance between the tissue paper and the storage box, and suppression of paper dust.

JP 2008-87854 A

  Therefore, the main problems of the present invention are excellent printability of the outer surface layer of the tissue paper storage box, excellent scratch resistance between the tissue paper and the tissue paper bundle and the tissue paper storage box, and suppression of paper dust. Providing a difficult tissue paper container

The first means for solving the above problems is
A tissue paper storage body in which a bundle of tissue paper is stored in a rectangular parallelepiped storage box having a bottom surface portion, a top surface portion on which an outlet is formed, a pair of long side surface portions, and a pair of short side surface portions. And
The storage box is composed of a surface layer, a front and lower layer, and a layer configuration of at least one middle layer and / or back layer, and has a basis weight of 250 g / m ^{2 to} 350 g / m ² and a density of 0.77 to 0.90 g / cm ^3. Is an assembly of base paper for paper packaging containers
The base paper for the paper packaging container has a surface layer and a front and lower layer made of mixed kraft pulp and waste paper pulp, and the middle layer and the back layer are used waste paper pulp derived from mechanical pulp-containing waste paper, and the mixed kraft pulp Is a mixture of softwood bleached kraft pulp and hardwood bleached kraft pulp, the softwood bleached kraft pulp / the hardwood bleached kraft pulp in a ratio of 40:60 to 60:40, and the length of the base paper for the paper packaging container The compressive strength of 650 to 800 N,
This is a tissue paper container.

The second means is
The surface layer is a mixture of mixed kraft pulp and high-quality waste paper pulp in a ratio of 45:55 to 55:45, and the front and lower layers are white, medium white, white Manila or imitation in waste paper statistical classification, The tissue paper container according to the first means, comprising waste paper pulp derived from colored waste paper, wherein the product moisture of the base paper for paper packaging container according to JISP8127 is 6.5 to 8.0%.

The third means is
The surface layer has a surface coating layer mainly composed of ² to 10 g / m ² of pigment and adhesive per side, and the surface coating layer has a whiteness of 75% or more and a white paper glossiness of 20%. It is tissue paper storage body which concerns on said 1st and 2nd means which is -50%.

The fourth means is
The tissue paper container according to any one of the first to third means, wherein a back coating layer comprising polyvinyl alcohol, a paper strength enhancer, and a lubricant is provided on the outer surface of the back layer.

The fifth means is
The polyvinyl alcohol has a polymerization degree of 1000 to 2000 and a saponification degree of 98.0 to 99.0, the paper strength enhancer is a modified polyacrylamide type paper strength enhancer, and the lubricant is made of polyethylene wax. A tissue paper container according to the fourth means, which is an aqueous dispersion of wax particles.

The sixth means is
A bundle of tissue paper is a two-ply tissue paper having a basis weight of 10 to 18 g / m ² per ply, and is laminated in a pop-up type of 150 to 220 pairs, and the height of the storage box is 38 to 100 mm. The tissue paper storage body according to the first means.

The seventh means
The tissue paper is a tissue paper container according to the first means to which a chemical solution containing a polyol is applied.

  ADVANTAGE OF THE INVENTION According to this invention, it is excellent in the printability of the outer surface layer part of a tissue paper storage box, the abrasion property of a tissue paper or a tissue paper bundle, and a tissue paper storage box, and suppression of paper dust, and it is hard to crush the tissue paper storage box. A tissue paper container is provided.

It is a perspective view of the tissue paper storage body concerning the present invention. It is a perspective view which shows the structure of the tissue paper storage body based on this invention. It is a perspective view at the time of use of the tissue paper storage body concerning the present invention. It is an expanded view of the tissue paper storage body which concerns on this invention. It is sectional drawing of the tissue paper storage body which concerns on this invention. It is a cross-sectional enlarged view of the storage box of the tissue paper storage body which concerns on this invention.

  Hereinafter, the tissue paper storage body according to the present invention will be described in detail with reference to FIGS. Note that the tissue paper storage body according to the present invention is not limited to the following embodiments, and the scope thereof does not depart from the matters described in the present specification (including claims and drawings). Needless to say, the configuration can be appropriately changed.

  The tissue paper storage body 1 according to the present embodiment is used for forming an outlet having a portion in which a plurality of tissue papers 2t, 2t,... When the tissue paper 2t is taken out from the outlet 20X that is stored in the storage box 1 in which the perforation 20 is formed and is formed by the tearing of the outlet forming perforation 20 at the time of use, the lower layer laminated adjacently is removed. The tissue paper 2t is a so-called pop-up type in which a part of the tissue paper 2t is exposed from the outlet 20X.

  The storage box 10 in which the tissue paper bundle 2 is stored has a rectangular parallelepiped shape also called a carton box or a carton, and forms an outline of the storage body 1. The storage box 10 has the outlet forming perforation line 20 for forming the outlet 20X in the top surface portion 11 as described above, and the range 20a surrounded by the outlet forming perforation line 20 is: The sheet material 31 is covered with a slit from the inside of the storage box. The outlet forming perforation line 20 formed on the top surface portion 11 has an annular shape and is configured with an appropriate cut tie ratio. The outlet forming perforation line 20 can be constituted by a double perforation line, a zipper perforation line, or the like in addition to a normal perforation line. Only a part may be a double perforation line.

  The outlet forming perforation line 20 according to the present embodiment has long sides 21 and 21 extending in the longitudinal direction of the storage box 10 and a short side 22 parallel to the short edge connecting the ends of the long sides 21 and 21. , 22, and the shape of the range 20 a surrounded by the outlet forming perforation line 20 is an appropriate shape having a long direction along the longitudinal direction of the storage box 10. In general, a slightly elongated rectangular shape along the longitudinal direction of the storage box 10, or the central part of the long sides 21 and 21 of the rectangle is slightly expanded outward to form an arch shape, and a shape close to an ellipse. It is a thing. The illustrated form shows the latter example.

  On the other hand, in the tissue paper storage body 1 according to the present embodiment, as described above, the range 20a surrounded by the outlet forming perforation line 20 is covered with the sheet material 31 attached to the inner surface of the storage box. The sheet material 31 is larger than a range 20a surrounded by the outlet forming perforation line 20, for example, a rectangle or an ellipse, and particularly on the inside of the box on the top surface of the storage box, for cutting off the perforating line 20 for forming the outlet. In order not to be affected, the adhesive 40 is attached outside the range 20a surrounded by the perforation line 20 for forming the outlet. The slit 30 in the sheet material 31 is positioned along the longitudinal direction in a range 20 a surrounded by the outlet forming perforation line 20, and accordingly, the outlet forming sewing machine along the outlet forming perforation line 20. By cutting off the range 20a surrounded by the line of sight 20, the outlet 20X is formed on the top surface 11, and the sheet material 31 and the slit 30 are exposed through the outlet 20X. The tissue paper 2t can be pulled out from the slit 30 one by one. As the sheet material 31, a known resin film or paper is used.

  The size of the storage box 10 is not particularly limited, but many known tissue paper storage bodies 1 have a long edge length L1 of 110 to 320 mm, a short edge length L2 of 70 to 200 mm, and a height L3. It is about 40 to 150 mm, and the storage box 10 according to the present embodiment can also have this size.

  The structure of the storage box 10 according to the present embodiment is such that the bottom surface portion 12 and one long side surface portion 13 are glued with a glue margin portion 12A to form a cylindrical shape, and then the top surface portion 11, the bottom surface portion 12 and the length connecting them. A structure in which the flaps F1, F2, and F3 extending from the side surface portion 13 are folded back toward the inner surface of the box, and the contact portions of the flaps F1, F2, and F3 are bonded with a hot melt adhesive or the like to form the short side surface portion 14. It has become. In particular, the storage box 10 of the present embodiment folds back the flap F1 from the long side surface portion 13, folds back the flap F2 from the bottom surface portion 12, overlaps the flap F1 from the long side surface portion 13, and further from the top surface portion 11. A short side surface portion 14 is formed so that the flap F3 is folded and overlapped with the flap F2 from the bottom surface portion 12. However, the storage box 10 is not limited to this structure.

  The storage box 10 according to the tissue paper storage body 1 according to the present invention is an assembly of a paper packaging container base paper 71 also called a carton base paper. More specifically, the paper packaging container base paper 71 is punched out. Then, a box unfolded sheet, which is a base paper for a paper packaging container, also called a carton blank, is assembled. Here, the base paper 71 for paper packaging containers according to the tissue paper storage body 1 according to the present invention has the following characteristic configuration. FIG. 6 is a partial cross-sectional enlarged view of the storage box 10 of the tissue paper storage body 1, that is, a conceptual cross-sectional view showing an aspect of the paper for packaging paper constituting the storage box. A base paper 71 for a paper packaging container shown in FIG. 6 includes a base paper 76 having a layer structure of a surface layer 72, a front and lower layer 73, a middle layer 74, and a back layer 75, and the surface layer side surface (hereinafter referred to as “upper surface”) of the base paper 76. The surface coating layer 77 made of the surface layer coating liquid is provided on the back surface layer side surface (hereinafter referred to as “lower surface”) of the base paper 76 and made of the back surface coating liquid. A back layer coating layer 78 is provided. The storage box 10 is configured with the upper surface as the outer surface side and the lower surface as the inner side.

  The surface layer and the upper and lower layers have a structure composed of mixed kraft pulp and waste paper pulp. A preferred embodiment will be described below. First, the surface layer 72 will be described. The pulp used for the surface layer 72 is preferably mixed pulp of softwood bleached kraft pulp or hardwood bleached kraft pulp (hereinafter referred to as “mixed bleached kraft pulp”). The ratio of this mixed bleached kraft pulp is (conifer bleached kraft pulp) :( hardwood bleached kraft pulp) = 40: 60 to 60:40. As a result, the base paper for paper packaging containers is reduced in weight and weight, and the binding of pulp fibers in the surface layer is strengthened, making it difficult to break ruled lines and preventing the loss of fine fibers and inorganic substances. The Therefore, in the tissue paper storage body having a storage box assembled with such a paper packaging container base paper, the storage body itself is reduced in weight, and a sanitary ridge is formed, and the box is not easily crushed. .

  When the ratio of softwood bleached kraft pulp is less than 40 and the ratio of hardwood bleached kraft pulp exceeds 60, ruled line cracking is likely to occur due to a decrease in long fiber pulp. On the other hand, when the ratio of the softwood bleached kraft pulp is more than 60 and the ratio of the hardwood bleached kraft pulp is less than 40, the surface layer cannot be made a uniform texture because there is too much long fiber pulp (flatness) In addition to causing printing defects, it is difficult to secure the rigidity of the storage box because the paper is less likely to be squeezed and the weight of the base paper for paper packaging containers is reduced. In addition, since mixed bleached kraft pulp is soft and easily crushed when subjected to calendering, the base paper should be calendered before forming the surface coating layer when forming the base paper for paper packaging containers. As a result, the surface of the base paper is further flattened, and the surface layer coating liquid can be uniformly coated on the surface layer.

  Further, in addition to the above-mentioned mixed bleached kraft pulp, the surface layer 72 is a high-quality waste paper pulp (hereinafter simply referred to as “high-quality paper”) made of waste paper derived from the top white card (for example, top white waste paper, coated paper, etc.) in the waste paper statistical classification. Waste paper pulp ") may be added. With this, the base paper for paper packaging container according to the present invention can be reduced in weight and weight, strengthening the binding of the pulp fibers of the surface layer 2, making it difficult to break the ruled line, and the storage box The accuracy of the ridge line is increased and it is difficult to crush the box, and the loss of fine fibers (for example, paper powder) and inorganic substances is also prevented. In the surface layer 2, it is preferable that the high-quality waste paper pulp has a mixing ratio with the above-described mixed bleached kraft pulp, that is, (mixed bleached kraft pulp) :( high-quality waste paper pulp) = 45: 55 to 55:45. In addition, when the ratio of mixed bleached kraft pulp is less than 45 and the ratio of high-quality used paper pulp exceeds 55, ruled line cracking is likely to occur due to the decrease in long fiber pulp, and the precision of the ridge line is likely to be reduced. Become. On the other hand, when the ratio of the mixed bleached kraft pulp is more than 55 and the ratio of the high-quality waste paper pulp is less than 45, the surface layer cannot be made a uniform texture because there is too much long fiber pulp (flatness) In addition to causing printing defects, it is difficult to tighten the paper and make it difficult to secure the rigidity of the storage box when the base paper for the paper packaging container is reduced in weight and weight.

  In forming the base paper for paper packaging containers, the surface layer 72 can be formed only by the above-mentioned pulp, but the sizing agent, sulfuric acid band, paper strength enhancer (separate from the surface enhancer described later). Such internal chemicals may be used. In this case, the sizing agent is preferably about 10-20 kg / PT (absolutely dry pulp ton), the sulfate band is preferably about 60-70 kg / PT, and the paper strength enhancer is 30-50 kg / PT to the surface layer. This is preferable because it adjusts the amount of ink impregnation in printing, fixes the sizing agent or paper strength enhancer to the raw material pulp, and improves the strength of the surface layer. In this case, an internal sizing agent such as an alkyl ketene dimer, alkenyl succinic anhydride, rosin or the like is used. Among paper strength enhancers, wet form strength enhancers include urea formaldehyde resin, melamine formaldehyde resin, polyamide polyamine epichlorohydrin (PAE), and polyvinylamine (PVAm), and dry paper strength enhancers include cationized starch and cation. In general, the use of a polyacrylamide copolymer of sex or amphoteric is used.

  Next, the front and lower layer 73 will be described. The front lower layer 73 is made of used paper pulp derived from Kent, special white, medium white, white Manila or imitation, or colored paper in the used paper statistical classification. The surface layer uses raw material pulp that does not significantly change the properties of the surface layer raw material pulp while minimizing the effect of the surface layer on the pulp hue, so that surface layer peeling and paper strength are maintained while maintaining the surface layer color tone. Can be maintained.

  Moreover, although the front and lower layers 73 are formed only with the above pulp, as in the surface layer 72, internal chemicals such as a sizing agent, a sulfuric acid band, and a paper strength enhancer (separate from the surface enhancer described later) may be used. . In this case, the size is preferably about 10 to 20 kg / PT, the sulfate band is preferably about 80 to 95 kg / PT, and the paper strength enhancer is preferably about 25 to 35 kg / PT. The upper and lower layers do not require the same printability and paper strength as the surface layer, but the surface layer has a synergistic effect by suppressing the movement between paper layers when combining chemicals such as paper strength enhancers, sizing agents, and sulfuric acid bands. In order to ensure, it is preferable to invite to the said range. In particular, the paper strength enhancer can increase the paper strength, but has a problem of hardening the paper layer. When the paper layer becomes hard, the present invention is intended for use in a paper packaging container that requires folding. In addition, since the problem arises that the paper layer breaks at a so-called crease, it is necessary to adjust the content of the chemical within a range in which flexible folding can be performed following the surface layer. As the sizing agent in this case, an internal sizing agent such as alkyl ketene dimer, alkenyl succinic anhydride, and rosin is also used. Among paper strength enhancers, wet paper strength enhancers include urea formaldehyde resin, melamine formaldehyde resin, polyamide polyamine epichlorohydrin (PAE), polyvinylamine (PVAm), and dry paper strength enhancers include cationized starch and cation. In general, the use of a polyacrylamide copolymer of sex or amphoteric is used.

  About the middle layer 74 and the back surface layer 75, the same raw material pulp is used, and the raw material pulp is not particularly limited, but in general, white paper made from cut-out paper, newspapers, magazines, etc. generated during the manufacture of paper containers is used. Raw material pulp mainly composed of balls, old paper, etc., that is, used paper pulp derived from used paper is used and also contains mechanical pulp. Incidentally, the middle layer 74 and the back surface layer 75 have a two-layer structure in the conceptual cross-sectional view shown in FIG. 6, but may have a multilayer (multi-layer) structure of three or more layers. Conversely, a structure in which the middle layer 74 and the back layer 75 are formed as a single layer (single layer) may be employed. When the middle layer has a multi-layer structure, there is no limitation as long as it is the above-mentioned waste paper, the same type or different types may be used for each layer.

  In addition, the intermediate layer 74 and the back layer 75 are formed only with the above pulp, but like the surface layer 72 and the front and lower layer 73, internal additives such as a sizing agent, a sulfuric acid band, and a paper strength enhancer (separate from the surface enhancer described later). You may use chemicals. In this case, the sizing agent is preferably about 10 to 20 kg / PT, the sulfuric acid band is preferably about 40 to 70 kg / PT, and the paper strength enhancer is preferably about 10 to 20 kg / PT. The middle layer (and / or the back layer) needs to bear a cushioning effect when folded when used in a paper packaging container in which folding is essential, and in order to maintain the original flexible properties of raw pulp, It is necessary to limit the amount of chemical used to produce the minimum effect. As the sizing agent in this case, an internal sizing agent such as alkyl ketene dimer, alkenyl succinic anhydride, and rosin is also used. Among paper strength enhancers, wet paper strength enhancers include urea formaldehyde resin, melamine formaldehyde resin, polyamide polyamine epichlorohydrin (PAE), polyvinylamine (PVAm), and dry paper strength enhancers include cationized starch and cation. In general, the use of a polyacrylamide copolymer of sex or amphoteric is used.

  Moreover, in the base paper 71 for the paper packaging container of the storage box which concerns on the tissue paper storage body of this invention, the ash content measured according to JIS-P8252 (525 degreeC) is 10-25%, and 13-20% are more preferable. If the ash content is less than 10%, the paper density tends to decrease, the compression strength tends to decrease, and the strength of the box tends to decrease. On the other hand, when the ash content exceeds 25%, ruled line cracking is likely to occur, and a ridge line portion with low precision that becomes the starting point of crushing of the storage box is likely to be formed.

Furthermore, in the above ash content range, when the paper density of the base paper 76 of the base paper 71 for paper packaging container is 0.77 to 0.90 g / cm ³ , the absorption balance of the surface layer coating liquid to the base paper is Best, it is possible to reduce the weight and weight by 10 to 15% compared to conventional paperboard, and to maintain the compressive strength of the paperboard and maintain the processing suitability even if the weight and weight are reduced. I understood that I could do it. Therefore, the tissue paper storage body in which such paper packaging container base papers are assembled is lightweight and difficult to be crushed.

  The base paper of the base paper for the paper packaging container is obtained by subjecting the above-described raw material pulp to a surface layer, a front and lower layer, and at least one through a known papermaking process, for example, a wire part, a press part, a dryer part, a size press, a calendar part, and the like. It is formed so as to have four paper layers, that is, a middle layer and / or a back layer. The paper making method of the base paper 76 of the base paper for the paper packaging container is not particularly limited, and any of an acidic paper making method, a neutral paper making method, and an alkaline paper making method may be used. Also, since the paper machine is not particularly limited, for example, various known paper machines such as a long net paper machine, a twin wire paper machine, a circular net paper machine, and a short net combination machine can be used. it can.

Moreover, the base paper 76 used for the base paper for paper packaging containers has the base paper basis weight (g / m < ² >) of each layer, the surface layer is 30-40, the surface lower layer is 45-60, and the middle layer (back surface layer) is 140. It is preferable to adjust so that it has a relationship of surface layer <surface lower layer <middle layer ≦ back surface layer in a range of ˜210. Accordingly, the storage box can have a surface coating layer and a back coating layer that can be reduced in weight and weight and can maintain rigidity.

  It is desirable that the longitudinal strength of the base paper 76 has a compression strength of 650 to 850N. In the storage box, the paper flow direction is the direction in which the weight and shape are supported. Therefore, it is difficult for the box to be crushed when it has such compressive strength.

The basis weight of the base paper 76 is preferably 250 to 350 g / m ² . If the basis weight is less than 250 g / m ² , the compressive strength of the storage box may not be sufficient. On the other hand, if it exceeds 350 g / m ² , the paper thickness of the base paper also increases, and therefore when the base paper for paper packaging containers is folded, the surface stress becomes too strong, and the surface coating layer and the surface layer of the base paper Cracks may occur, making it difficult to form precise ridges.

  Further, the base paper 76 of the base paper for the paper packaging container is preferably manufactured by press-contacting a mirror-finished dryer after the pressing step, and particularly preferably press-dried by a large-diameter dryer such as a Yankee dryer. . More preferably, the wet paper web moisture of the base paper before press contact is 53 to 60%. When the moisture content of the wet paper is less than 53%, the absolute amount of moisture present on the surface is reduced, and only the front and back surfaces are overdried. The unevenness of the front and back surfaces becomes large, and it becomes difficult to achieve the object of the present invention with the coating amount of the surface layer coating liquid or the back surface layer coating liquid described later. On the other hand, if the moisture content of the wet paper exceeds 60%, the absolute moisture amount distributed in the surface layer or the back layer of the base paper increases, and the amount of water vapor evaporated from the surface layer or the back layer increases. Insufficient contact makes it difficult to obtain good surface and back layers. And it is desirable that the product moisture by JISP8127 is 4.0 to 9.5%. Maintains flexibility of raw pulp, combined with refraining from using chemicals that harden the paper layer, such as paper strength enhancers, as a workability in folding machines and countermeasures against tearing of folded parts when forming storage boxes For the purpose, it is preferable to adjust the product moisture to a predetermined range. Moreover, the strength of the storage box is maintained even after the storage box is formed.

  The base paper for paper packaging containers is made from the base paper 76, and then the secondary layer is coated with a surface layer coating solution and a back layer coating solution by a coating machine such as a printing machine, bar coater, rod coater or air knife. The front surface coating layer 77 and the back surface coating layer 78 are formed by coating.

  On the surface layer 72 (upper surface) of the base paper for paper packaging containers, a surface coating layer 77 formed by coating a surface layer coating liquid mainly composed of a pigment and an adhesive is formed. Further, a back surface coating layer 8 is formed by coating a back surface layer coating solution made of a water-soluble resin on the back surface layer (lower surface) of the base paper. Accordingly, the tissue paper and tissue paper bundle on the back layer side and the inner surface of the base paper for paper packaging containers (corresponding to the back layer and the inner surface of the storage box) are excellent in paper dust suppression effect.

  The pigment used for the surface coating layer 77 can be a basic inorganic pigment. As the inorganic pigment, inorganic pigments such as clay, calcium carbonate, and silica can be used. Among them, when clay and calcium carbonate are used, processability and printability are excellent. About the compounding quantity of an inorganic pigment, it is preferable that the ratio in the case of clay: calcium carbonate is 10-90: 90-10. Thereby, it can have processability and printability. Clay is preferably used as an inorganic pigment that brings about flatness and gloss as an inorganic pigment in the surface coating layer, and is preferably combined with calcium carbonate as an inorganic pigment having high whiteness to improve the appearance of printing, and the content of clay However, if the amount is less than 10 parts by weight, there is a problem that the fineness of printing is inferior. Further, even when the content of calcium carbonate is less than 10 parts by weight, the whiteness tends to decrease, and the problem of poor printing appearance tends to occur. When the content exceeds 90% by weight, the fineness of printing is lacking. Is likely to occur. Organic pigments can also be used. Organic pigments have lower hardness than inorganic pigments, but the particles have elasticity and rigidity, and gloss, so that printability, resistance to crease resistance, and compressive strength can be satisfied in a well-balanced manner. And more preferred than inorganic pigments. Therefore, the softness | flexibility and rigidity of a surface coating layer are securable by containing an organic pigment in the coating liquid for surface layers in this way. Thereby, the tolerance with respect to the bending stress of the surface layer can be improved and the resistance to ruled line cracking can be improved, so that the occurrence of cracks in the surface coating layer can be greatly reduced. However, the organic pigment may or may not be used.

The coating amount of the surface layer coating solution is ^{2 to} 10 g / m ² (in terms of dry), in the dry state of the surface coating layer 7 (the state of the surface coating layer formed on the base paper). Preferably it is 4.5-9.5 g / m < ² >. As a result, it is possible to seal between the pulp fibers of the surface layer of the base paper in contact with the surface coating layer, so that the printability can be improved, and the printing surface is smoothed and the coating layer rigidity is improved. It can be secured. In addition, since the thickness of the surface coating layer does not become too thick, the ink easily penetrates into the base paper and the ink adhesion becomes high, so that high-definition printing with good color reproducibility becomes possible. Further, since the surface coating layer is not thick, the storage box is excellent in air permeability, and the strength of the storage box is not easily lowered due to moisture absorption of the tissue paper bundle.

If the coating amount of the surface layer coating liquid is less than 2 g / m ² , the sealing effect between the pulp fibers of the surface layer cannot be exhibited, and there is a problem that ink bleeding is likely to occur. The high-definition printability desired by the present application cannot be sufficiently obtained. On the other hand, if the coating amount exceeds 10 g / m ² , the thickness of the surface coating layer becomes too thick and the rigidity of the coating layer is improved, but the resistance to the bending stress of the surface layer cannot be obtained, and precise Although the ridgeline is formed, it tends to be inferior in box crushing property.

  The organic pigment contained in the surface layer coating liquid is preferably a hollow plastic pigment (PP). Although the hardness is lower than that of the inorganic pigment, it has rigidity, so that the pigment itself can be easily deformed, easily formed into a precise ridgeline, and difficult to be crushed.

  Moreover, it is preferable that SBR latex is contained as an adhesive for the surface coating layer 7 (used in the surface layer coating solution). SBR latex has an appropriate film-forming property and rigidity, and also has a good ink deposition property. Therefore, by including the organic pigment and SBR latex in the surface layer coating liquid, not only the resistance to ruled line cracking as a base paper for paper packaging containers, but also the ink inking property, the base paper for paper packaging containers Even if the weight is reduced and the weight is reduced, the storage box becomes lighter and stronger because it maintains the compressive strength.

  In addition to the above SBR latex, the resin that serves as the adhesive includes acrylamide resins, styrene resins, acrylic resins, polyvinyl resins such as PVA, and resins such as starch. Such styrenic resins are particularly preferred.

  Further, the amount of SBR latex in the surface layer coating solution is preferably 6 to 15 parts by weight, preferably 9 to 12 parts by weight, based on 100 parts by weight of the pigment (inorganic pigment).

  When the blending amount of the SBR latex is less than 6 parts by weight with respect to the pigment, there are few adhesives, and it becomes difficult to satisfy the ruled line crack resistance. Further, the surface coating layer is easily damaged by rubbing. On the other hand, when the blending amount of SBR latex exceeds 15 parts by weight, the surface of the surface coating layer tends to be sticky, and the surface coating layer and the back surface coating layer are formed when processed into a wound product. Since it tends to stick, there is a risk of picking on the paper surface. Further, although the resistance of the surface coating layer to bending stress is improved, the surface coating layer itself loses its flexibility and tends to become hard, so that it is difficult to form a precise ridgeline, and a problem arises particularly in aqueous printability.

  In addition, as a coating method of the above-mentioned surface layer coating liquid in producing a paper packaging container base paper, single coating or multi-stage coating more than double coating may be used, and the coating equipment includes a bar coater, There are blade coaters, air knife coaters, rod blade coaters, gate roll coaters, roll coaters such as size presses, bill blade coaters, velvapa coaters, and calendar roll coaters. Further, before the surface layer coating solution is applied onto the surface layer of the base paper (before the surface coating layer is formed), the surface layer coating solution is applied uniformly, and the surface coating layer 7 In order to smoothen the surface, it is preferable to subject the base paper to surface treatment with a calendar part.

  When forming the surface coating layer 77 by applying the surface layer coating liquid, the storage box has a whiteness of 75% or more and less than 85% and a blank paper glossiness of 20% to 40%. Preferably there is. The tissue paper container must naturally have a good appearance for incentives to purchase and information on its surface, and it should not cause any problems with the appearance or information being soiled or missing in the transport or display. . By setting the whiteness and glossiness within a predetermined range, it is possible to improve the appearance of printing and improve the consumer's willingness to purchase.

  As a preferred configuration of the present invention, a back surface coating layer 78 is formed by applying a back surface layer coating solution made of a water-soluble resin onto the back surface layer (lower surface) of the base paper. As the water-soluble resin, for example, starch (including various modified starches such as phosphate esterified starch and cationized starch), polyvinyl alcohol (PVA), and polyacrylamide resin (PAM) Casein, polystyrene-butadiene latex, polyvinyl acetate latex, polyacrylic latex, polyurethane latex and the like can be used. Among these, in the storage box according to the present invention, it is preferable to use a combination of PVA and a lubricant in consideration of film forming property, rigidity, and permeability to a base material.

  The polyvinyl alcohol preferably has a polymerization degree of 1000 to 2000 and a saponification degree of 98 to 99. Polyvinyl alcohol has the property that the coating strength obtained is high when the degree of polymerization is high and is difficult to dissolve in water, and the coating strength obtained is high when the degree of saponification is high, and exhibits the property that it is difficult to dissolve in cold water. . In order to satisfy the required quality required for the packaging container base paper that is the subject of the present invention, the present inventors have a problem that the viscosity increases and the operability deteriorates. It has been found that it is preferable to use polyvinyl alcohol having a degree of conversion. Incidentally, the polyvinyl alcohol is preferably 2 to 3 parts by weight in the back layer coating solution. If the amount is less than 2 parts by weight, a surface coating cannot be formed, the surface strength is low, and paper scumming or the like due to a paper surface fiber trace occurs. If it is 3 parts by weight or more, the film thickness becomes thick and the penetration of the adhesive is inhibited, so that the adhesive strength of the adhesive is lowered.

  In addition to PVA, higher aliphatic hydrocarbons (paraffin wax), higher aliphatic alcohol lubricants, higher fatty acid lubricants, higher fatty acid amide lubricants, higher fatty acid metal salt lubricants, higher fatty acid ester lubricants are used as lubricants. Of these, paraffin wax is preferably used. The purpose of using paraffin wax is to prevent the back layer paper dust and foreign matter from falling off. As for the paraffin wax, the shape of the wax is not particularly limited, but an emulsion type is preferable. Incidentally, the lubricant (mainly paraffin wax) is preferably 0.1 to 0.5 parts by weight in the back layer coating liquid. If the amount is less than 0.1 part by weight, the frictional resistance value does not improve, so that the drop of the paper powder ink fountain cannot be improved. When the amount is 0.5 parts by weight or more, the surface slipping property is improved, and troubles such as load collapse when the cases are stacked are likely to occur.

  In addition to PVA and a lubricant, a modified polyacrylamide resin can be used as a surface paper strength enhancer.

  Moreover, it is good to adjust the coating liquid for back surface layers so that a density | concentration may be 1-8%, More preferably, it will be 2-5%. If the concentration of the back surface layer coating liquid is less than 1%, the back surface layer coating liquid will permeate the base paper too much, making it difficult to obtain the rigidity of the paper surface on the back layer side of the base paper. Become a trend. For this reason, it becomes difficult to maintain the compressive strength of the base paper for paper packaging containers, and it becomes difficult to satisfy the processing suitability desired by the base paper for paper packaging containers. On the other hand, if the concentration exceeds 8%, the compressive strength can be maintained, but the viscosity of the back layer coating solution tends to be too high, so that the back layer coating solution penetrates into the base paper. In addition to the problem that the operability is further deteriorated, the surface on the back layer side tends to become hard, and it becomes difficult to satisfy processing suitability such as resistance to cracking on the back layer side.

Moreover, the coating amount of such a back surface layer coating solution is 0.2 to 0.6 g / m ² (in terms of dry), more preferably 0.4 to 0.5 g / m ² . As a result, the paper packaging container base paper maintains the processing suitability required for processing into a storage box. Further, the storage box made of the paper for a paper packaging container is hardly damaged.

When the coating amount of the back layer coating liquid is less than 0.2 g / m ² , it becomes difficult to satisfy the desired rigidity of the paper surface on the back layer side of the present invention. If it exceeds 6 g / m ² , the rigidity of the paper surface on the back surface layer side can be satisfied, but the flexibility of the back surface coating layer tends to be lost and tends to become hard. It becomes difficult to satisfy processing suitability such as suitability.

  By forming the back surface coating layer 78 by coating the above back surface layer coating liquid on the back surface layer 75 of the base paper, not only the strength of the surface of the back surface coating layer 78 but also tissue paper and tissue. It shows excellent effects in rubbing with paper bundles and suppressing paper dust.

  The coating method for the back layer coating solution may be single coating or multi-stage coating more than double coating. The coating equipment includes bar coater, blade coater, air knife coater, rod blade coater. , Gate roll coaters, roll coaters such as size presses, bill blade coaters, velvapa coaters, and calendar roll coaters. Regarding the coating equipment, among these, a calender roll coating method capable of coating under high linear pressure is preferable. Further, a chilled roll is more preferable as the calendar roll. Further, an on-machine calendar, a soft calendar, a gloss calendar, or the like can be used for flattening the surface of the back coating layer after coating.

  As described above, in the tissue paper storage body according to the present invention, the paper packaging container base paper constituting the storage box has a base paper composed of a plurality of layers, and a specific water-solubility is provided on the back layer of the base paper. A back surface coating layer is formed by coating a back surface layer coating liquid having a specific blending ratio of a functional resin, a lubricant, and a paper strength enhancer. Furthermore, the ash content of the base paper and the fiber orientation by layer are specified. This increases the rigidity of the front and back layers, making it possible to achieve a 10 to 15% reduction in weight and weight compared to the base paper used in conventional storage boxes. Even if it aims at, processing aptitude and printing aptitude can be satisfied. Therefore, it is excellent in printability of the outer surface layer portion of the tissue paper storage box, scratch resistance between the tissue paper and the tissue paper bundle and the tissue paper storage box, and suppression of paper dust, and the tissue paper storage body in which the tissue paper storage box is not easily crushed. It becomes. The tissue paper storage body according to the present invention can reduce the storage box by about 10 to 20%, and the storage body (whole product) can also be reduced by about 1.5 to 3.0%. It is.

  By the way, the structure of the tissue paper bundle 2 included in the tissue paper storage body will be described in detail. The tissue paper bundle 2 is formed by substantially folding the square tissue paper 2t into two, and the edges of the folded pieces are vertically moved. Are stacked while being alternately stacked so as to be positioned on the folded inner surface of the tissue paper adjacent to each other. Here, the term “substantially” means that the edge formed in the manufacturing is allowed to be slightly folded.

  In the tissue paper bundle 2 having this laminated structure, when one folded piece positioned at the top is pulled upward, the other folded piece adjacent immediately below it is pulled upward by friction and lifted.

  In the tissue paper storage body 1, the tissue paper bundle 2 having such a structure is stored with its uppermost surface facing the upper surface of the storage box 1 having the extraction port 20 </ b> X on the upper surface 11. When the first set (the set on the top surface) is drawn, a part of the other set located immediately below is exposed. Note that the number of tissue papers 2t in the present embodiment is not limited, but 120 to 240 sets are given as an example of the general number of sheets of this type of product. This tissue paper bundle 2 can be manufactured by a known interfolder of a multi-stand type or a rotary type.

  The tissue paper 2t constituting the tissue paper bundle 2 has a ply structure in which two to three thin papers are laminated.

  On the other hand, as raw material pulp of the thin paper constituting the tissue paper 2t according to the present embodiment, NBKP (conifer kraft pulp) and LBKP (hardwood kraft pulp) are blended, and even if used paper pulp is blended as appropriate. Although it is good, it is preferable to be composed only of NBKP and LBKP in terms of texture and the like. In this case, the blending ratio is preferably NBKP: LBKP = 20: 80 to 80:20, and particularly preferably NBKP: LBKP = 30: 70 to 60:40.

The rice tsubo per thin paper constituting each ply of the tissue paper 2t according to the present invention is preferably 10 to 25 g / m ² , more preferably 11 to 16 g / m ² . If the rice tsubo is less than 10 g / m ² , it is preferable from the viewpoint of improving softness, but it is difficult to ensure adequate strength that can withstand use. On the other hand, when the rice tsubo exceeds 25 g / m ² , the entire paper becomes hard, and a feeling of stickiness is generated, resulting in poor touch. In addition, the US tsubo is based on the US tsubo measurement method of JIS P 8124 (1998).

  On the other hand, the paper thickness of the tissue paper 2t according to the present invention is preferably 100 to 180 μm, more preferably 120 to 140 μm. In addition, when the tissue paper 2t has a plurality of plies, the measurement is performed with a plurality of plies. When the paper thickness is less than 100 μm, it is preferable from the viewpoint of improving the softness, but it is difficult to appropriately ensure the strength as the tissue paper 2t. On the other hand, when the thickness exceeds 180 μm, the texture of the tissue paper 2t is deteriorated and a feeling of tingling is generated during use.

  The paper thickness and the thickness of the sheet material 31 are measured by sufficiently adjusting the humidity of the test piece under the conditions of JIS P 8111 (1998), and then using the dial thickness gauge (thickness measuring instrument) “PEACOCK G” under the same conditions. It shall be measured using a “type” (manufactured by Ozaki Seisakusho). Specifically, confirm that there is no dust, dust, etc. between the plunger and the measuring table, lower the plunger on the measuring table, move the memory of the dial thickness gauge to adjust the zero point, and then Raise the plunger, place the sample on the test bench, slowly lower the plunger and read the gauge at that time. At this time, only the plunger is placed. The terminal of the plunger is made of metal so that a circular plane having a diameter of 10 mm is perpendicular to the plane of the paper, and the load at the time of measuring the paper thickness is about 70 gf. The thickness is an average value obtained by performing measurement 10 times.

Here, the tissue paper storage body according to the present invention is a stack of tissue paper, in which 150 paper-sheets with a ply basis weight of 10 to 18 g / m ² are stacked in 150 to 220 pairs in a pop-up manner. It is desirable that the height of the storage box is 38 to 100 mm. Within this range, the effect of being excellent in rubbing with tissue paper and tissue paper bundles in the storage box and paper dust suppression is sufficiently exhibited, tissue paper can be taken out smoothly, and paper dust is less generated. It becomes a storage body.

  Moreover, the tissue paper 2t may be provided with a chemical solution containing a polyol. A tissue paper to which a chemical solution containing a polyol is applied is also referred to as a moisturizing tissue or the like. The moisture content of the tissue paper is increased by the hygroscopic property of the polyol, and the softness and flexibility are excellent. On the other hand, due to the high moisture content of the tissue paper bundle as a whole, the moisture content of the storage box is easily increased and the strength of the box is easily reduced. Therefore, the storage body related to the moisturizing tissue is likely to be crushed. Since the tissue paper storage body according to the present invention has the increased air permeability of the storage box as described above, the strength reduction of the storage box due to the increased moisture content as in the moisturizing tissue is reduced. Suitable for a container containing tissue.

  Next, the embodiment according to the present invention described above will be described with reference to detailed examples (specific examples). The present embodiment will be described using the description of FIG. 6 as necessary.

  In this example, in order to confirm the effect of the base paper for paper packaging container of the multi-layered paper relating to the storage box constituting the storage body of the present invention, various samples as described below were prepared, and the quality for each of these samples was The test which evaluates was conducted. In addition, in a present Example, the numerical value which shows a mixing | blending, a density | concentration, etc. is a numerical value of solid content or the mass reference | standard of an active ingredient. Moreover, since the pulp, chemical | medical agent, etc. which are shown in a present Example are only examples, it cannot be overemphasized that this invention is not restrict | limited by these Examples, and can be selected suitably.

[Example 1] Production of base paper First, 31 types of base papers for paper packaging containers according to the present invention (referred to as "Example 1" to "Example 31"), and Examples 1 to In order to compare with Example 31, three types of paper packaging container base papers (referred to as “Comparative Example 1” to “Comparative Example 3”) were prepared as shown in Table 1.

  Using the following raw materials, according to the following production method, a base paper for a paper packaging container having a base paper composed of three layers of a surface layer, a surface lower layer, and an intermediate layer (and a back layer) was obtained. “Example 1” will be described as a typical example.

<Base paper>
・ Surface layer After blending 30% by weight of softwood bleached kraft pulp (NBKP), 20% by weight of hardwood bleached kraft pulp (dry), 15% by weight of fine white paper, and 35% by weight of good quality waste paper of coated paper, double The raw material was beaten with a disc refiner to make a paper with a basis weight of 40 g / m ² . In this pulp, as an internally added chemical, a sizing agent (rosin emulsion sizing agent, trade name: R10, manufactured by Modern Science Industrial Co., Ltd.), solid content of 14 kg / PT (absolute dry pulp ton) with respect to the weight of the raw material pulp, Sulfuric acid band (manufactured by Sumitomo Chemical Co., Ltd.), solid content 65kg / PT with respect to the weight of raw material pulp, and paper strength enhancer (product name: TST153, manufactured by Seiko PMC) with solid content with respect to the weight of raw material pulp Was added at 40 kg / PT to obtain a raw material pulp slurry.

-Surface lower layer 100 mass% of upper Kent waste paper was used as a raw material pulp slurry. In “Examples 8 to 10”, in addition to the upper Kent waste paper, the high quality waste paper of the coated paper is mixed with the raw pulp slurry. Further, in this pulp, a sizing agent (rosin emulsion sizing agent, trade name: R10, manufactured by Hyundai Kagaku Kogyo Co., Ltd.) is used as an internal additive in the same manner as the surface layer. , Sulfate band (manufactured by Sumitomo Chemical Co., Ltd.), 90 kg / PT in solid content with respect to the weight of raw material pulp, and paper strength enhancer (product name: TST153, manufactured by Seiko PMC), solid with respect to the weight of raw material pulp 28 kg / PT was added per minute to obtain a raw material pulp slurry. Further, the raw material was beaten with a double disc refiner to make a paper with a basis weight of 54 g / m ² .

・ Middle layer (back layer)
The raw material slurry containing 50% by mass as the main component was used for both the old paper and the old newspaper. Further, in this pulp, a sizing agent (rosin emulsion sizing agent, trade name: R10, manufactured by Hyundai Kagaku Kogyo Co., Ltd.) is used as an internal additive in the same manner as the surface layer. , Sulfate band (manufactured by Sumitomo Chemical Co., Ltd.), 60 kg / PT in solid content with respect to the weight of the raw material pulp, and paper strength enhancer (product name: TST153, manufactured by Seiko PMC), solid with respect to the weight of the raw material pulp 15 kg / PT was added per minute to obtain a raw material pulp slurry. The raw material was beaten with a double disc refiner to make a paper with a basis weight of 170 g / m ² .

  Next, about the surface coating liquid and the back surface coating liquid, it prepared with the compounding ratio shown in Table 2. “Examples 1 to 31” and “Comparative Examples 1 to 3” in Table 2 are the same as those in Table 1. A typical example of the adjustment method is described after Table 2 by taking Example 1 as an example.

<Coating liquid for surface layer>
Next, 23 parts by weight of clay (Amazon Plus JPG) and 77 parts by weight of calcium carbonate (Hydrocurve 90, wet heavy cal) are blended as the inorganic pigment, and styrene butadiene latex (SBR) (Smarter PA-6082) as the binder. (A 50% product, manufactured by Japan A & L Co., Ltd.) was blended in an amount of 9 parts by weight to prepare a coating solution for the surface layer.

<Coating liquid for back layer>
As a water-soluble resin polyvinyl alcohol (PVA) -based resin, PVA (JF-17, manufactured by Nihon Acetate / Poval Co., Ltd., polymerization degree 1700, saponification degree 98.0 to 99.0) is 2 in terms of solid content. .6% by mass, as a lubricant, polyethylene wax emulsion (Hitech E-9015, manufactured by Toho Chemical Co., Ltd.) is 0.2% by mass in terms of solid content, and as a surface paper strength enhancer, a modified polyacrylamide type paper strength enhancer (T-ST153, manufactured by Seiko PMC Co., Ltd.) was blended in an amount of 2.6% by mass in terms of solid content to prepare a back layer coating solution.

This surface layer coating solution is coated on the surface layer of the base paper with a bar coater at a coating amount of 6.0 g / m ² to form a surface coating layer. A back coat layer was formed by applying 0.4 g / m ² on the back layer of the base paper with a bar coater to obtain a base paper for paper packaging containers (Example 1). The numerical value of the coating amount is also a numerical value in a dry state.

<Calendar processing>
Next, the calendar process was performed under the conditions shown in Table 3 below. “Examples 1 to 31” and “Comparative Examples 1 to 3” in Table 3 are the same as those in Tables 1 and 2. A typical example of the calendar process is described after Table 3 by taking Example 1 as an example.

  In Table 3, “hard calendar” is used, but here, hard nip calendar processing was performed. Here, the descriptions “NO.1 calendar” and “NO.2 calendar” mean that there are two stacks of calendars. In Example 1, NO. 1 calendar and NO. In both calendars, the number of nips is one. In Table 3, “soft calendar” is used, and the soft calendar process is performed using a gloss calendar. In Example 1, the gloss is 195 ° C. and the linear pressure is 110 kgf / cm.

  Moreover, about Examples 2-31, and Comparative Examples 1-3, except the conditions shown in Table 1, 2, and 3, it carries out similarly to Example 1, and the base paper for paper packaging containers which concerns on each Example or a comparative example is shown. Produced.

[Example 2] Quality evaluation test Table 4 shows the results of quality evaluation for all of these Examples and Comparative Examples. This quality evaluation test was performed under environmental conditions of a temperature of 23 ± 1 ° C. and a humidity of 50 ± 2% in accordance with JIS-P8111.

  First, “product rice tsubo” in Table 4 is a value measured according to “paper and paperboard—basis weight measuring method” described in JIS-P8124 (1998).

  Next, “product moisture (%)” in Table 4 is the product moisture of the base paper for paper packaging containers measured by JISP8127 (2010).

“Density (g / cm ³ )” means the basis weight of the base paper of the paper packaging container base paper as each sample, and “paper and paperboard—thickness and density test method” described in JIS-P8118 (1998). It is a value calculated from the paper thickness of the base paper measured according to "."

  The “ash” in Table 4 is the value of ash (%) measured in accordance with “Paper, paperboard and pulp-ash content test method—525 ° C. combustion method” described in JIS-P8251 (2003). To tell.

  “Paper thickness (μm)” is the thickness of paper as a product according to each example and comparative example.

  “Whiteness (%)” means whiteness (%) measured according to “Method for measuring paper, paperboard and pulp-ISO whiteness (diffuse blue light reflectance)” described in JIS-P8148 (2001). Say the value.

  “White paper gloss (%)” is the value of gloss (%) of unprinted base paper measured according to “Paper and paperboard—Method of measuring 75-degree specular gloss” described in JIS-P8142 (2005). To tell.

  “Smoothness (seconds)” is a value of smoothness (seconds) measured according to “Smoothness test method using paper and paperboard-Beck smoothness tester” described in JIS-P8119 (1998).

“Cup water absorption (g / m ² )” is a measurement value of “paper and paperboard—water absorption test method—contact time 2 minutes based on Cobb method” described in JIS-P8140 (1991). Table) ”represents the surface layer side, and“ (Back) ”represents the back layer side.

“Specific burst strength (kPa / m ² / g)” means the rupture strength (kPa) of a paperboard measured according to “Paperboard—Burst strength test method” described in JIS-P8131 (2009) according to JIS-8124. The value divided by the basis weight (g / m ² ) measured by the method specified in (2011).

  The “compressive strength (longitudinal) (N)” is a compressive strength (longitudinal) measured in accordance with “paper and paperboard—compressive strength test method—ring crush method” described in JIS-P8126 (2005). Is the value of

  “Incision strength (longitudinal) (mN)” is a measured value based on “Paper—Tear Strength Test Method—Elmendorf Tear Test Method” described in JIS-P8116 (1990). Further, “printing strength (lateral) (mN)” is a measured value in the width direction in the papermaking direction.

  “Wax pick (back) (A)” means JAPAN TAPPI No. 1 (2000) is a value of the wax pick strength (A) on the back surface coating layer side measured in accordance with “Paper and paperboard—surface strength test method using wax”.

  “Folding strength (horizontal) (times)” means the lateral folding resistance measured according to “Paper and paperboard—Folding strength test method—MIT test machine method” described in JIS-P8115 (2001). Is the number of times.

“Box-making ability” means that the base paper for paper packaging containers is made into a blank sheet, and the blank sheet is evaluated in the process of making it into a storage box for storing tissue paper. When it is, the forming accuracy is good, and a storage box having a precise ridge line is formed, and the box is difficult to be crushed. The evaluation criteria were as follows.
A: When the blank sheet is transferred to the forming position, the surface of the paper is not damaged, the friction force between the left and right guide rails during the transfer of the blank sheet is different, and the blank sheet is on the horizontal plane. There is no problem that the blank sheet is inclined with respect to the forming position and the forming accuracy of the mandrel is lowered.
○: When the blank sheet is transferred to the forming position, there is almost no damage on the paper surface, and the friction force between the left and right guide rails during the transfer of the blank sheet is different, so that the blank sheet is on the horizontal plane. In this case, there is no problem that the blank sheet is displaced with respect to the molding position and the molding accuracy in the mandrel is lowered.
Δ: When the blank sheet is transferred to the forming position, scratches are scattered on the surface of the paper, the frictional force between the left and right guide rails at the time of transferring the blank sheet is different, and the blank sheet is inclined on the horizontal plane. The position of the blank sheet with respect to the molding position is shifted and the molding accuracy of the mandrel is slightly lowered.
×: When the blank sheet is transferred to the forming position, the surface of the paper is damaged, and the frictional force between the left and right guide rails during the transfer of the blank sheet is different, and the blank sheet is inclined on the horizontal plane. The position of the blank sheet with respect to the forming position is shifted and the forming accuracy with the mandrel is lowered.

“Rule cracking resistance” means that the multi-layer coated paperboard of each sample printed in the same manner as ink missing is cut into A4 size (longitudinal), folded in half with respect to the long side, and press pressure 2 This test was evaluated by checking the occurrence of cracks in the crease portion with the naked eye after pressing at 0.0 kg / m ² for 5 minutes, and is a test for confirming the precision of the ridgeline of the storage box. The evaluation criteria were as follows.
(Double-circle): It is a very precise ridgeline without a crack being generated.
○: The crack is less than 15% of the total length with respect to the crease length, and is a precise ridgeline.
Δ: The crack is 15% or more and less than 30% of the total length with respect to the crease length, and is a normal ridgeline.
X: Cracks are 30% or more of the total length with respect to the crease length, which is an inaccurate ridgeline.

"RI pick" is a standard tack grade ink used for IGT printability tester specified in JIS-P8129. Multi-layer paper coating using KRK Universal Printability Tester manufactured by Kumagai Riki Kogyo Co., Ltd. After printing on the coated layer of paperboard, it was evaluated by an RI printability test. The evaluation criteria were as follows.
A: No surface fluff or paper peeling is observed.
A: Fluff of 0.5 mm or more or paper peeling is 2 or less.
(Triangle | delta): The fuzz or paper peeling of 0.5 mm or more is 3-5 places.
X: Fluff of 0.5 mm or more and paper peeling are 6 or more places.

  From Table 4, when it is the multilayer paper-coated paperboard according to Examples 1 to 31, that is, the base paper for paper packaging containers according to the present invention, it is about 10 to 15% lower than the comparative example which is a conventional paperboard. It can be seen that the weight can be reduced. Therefore, the storage box according to the tissue paper storage body is also reduced in weight. In addition, the base paper for paper packaging containers according to the present invention has sufficient processing suitability for a storage box, sufficient strength, and satisfactory ridgeline precision, even if it is reduced in weight and weight. I understand.

  As mentioned above, although the embodiment according to the present invention has been described, the present invention is not limited to the above-described embodiment, and there are various examination subjects within the scope of the claims and the present specification. Needless to say.

  DESCRIPTION OF SYMBOLS 1 ... Tissue paper storage body, 2 ... Tissue paper bundle, 2t ... Tissue paper, 3 ... Base material (carton base paper), 10 ... Storage box, 11 ... Top surface part, 12 ... Bottom part, 12A ... Paste part, 13 ... Long side surface part, 14 ... short side surface part, 20 ... perforation forming perforation line, 20X ... outlet, 20a ... a range surrounded by perforation perforation line (outlet forming part), 21 ... perforation forming perforation line 22 ... the short side of the perforation line for tearing, 30 ... the slit, 31 ... the sheet material, F1 ... the flap extending from the long side surface part, F2 ... the flap extending from the bottom surface part, F3 ... from the top surface part Extending flap, 40 ... Adhesive, L1 ... Length of long edge of storage box, L2 ... Length of short edge of storage box, L3 ... Height of storage box, 51-53 ... Ridge line, 71 ... Paper Wrapping base paper, 72 ... surface layer, 73 ... outer layer, 74 ... middle layer 75 ... backing layer, 76 ... base paper, 77 ... surface coating layer (coating layer), 78 ... rear surface coating layer (clear coat layer).

Claims (7)

A tissue paper storage body in which a bundle of tissue paper is stored in a rectangular parallelepiped storage box having a bottom surface portion, a top surface portion on which an outlet is formed, a pair of long side surface portions, and a pair of short side surface portions. And
The storage box is composed of a surface layer, a front and lower layer, and a layer configuration of at least one middle layer and / or back layer, and has a basis weight of 250 g / m ^{2 to} 350 g / m ² and a density of 0.77 to 0.90 g / cm ^3. Is an assembly of base paper for paper packaging containers
The base paper for the paper packaging container has a surface layer and a front and lower layer made of mixed kraft pulp and waste paper pulp, and the middle layer and the back layer are used waste paper pulp derived from mechanical pulp-containing waste paper, and the mixed kraft pulp Is a mixture of softwood bleached kraft pulp and hardwood bleached kraft pulp, the softwood bleached kraft pulp / the hardwood bleached kraft pulp in a ratio of 40:60 to 60:40, and the length of the base paper for the paper packaging container The compressive strength of 650 to 800 N,
A tissue paper container characterized by that.   The surface layer is a mixture of mixed kraft pulp and high-quality waste paper pulp in a ratio of 45:55 to 55:45, and the front and lower layers are white, medium white, white Manila or imitation in waste paper statistical classification, 2. The tissue paper container according to claim 1, wherein the tissue paper container is made of used paper pulp derived from colored paper and has a product water content of 6.5 to 8.0% according to JISP8127. The surface layer has a surface coating layer mainly composed of ² to 10 g / m ² of pigment and adhesive per side, and the surface coating layer has a whiteness of 75% or more and a white paper glossiness of 20%. The tissue paper container according to claim 1 or 2, which is -50%.   The tissue paper container according to any one of claims 1 to 3, wherein a back coating layer made of polyvinyl alcohol, a paper strength enhancer, and a lubricant is provided on the outer surface of the back layer.   The polyvinyl alcohol has a polymerization degree of 1000 to 2000 and a saponification degree of 98.0 to 99.0, the paper strength enhancer is a modified polyacrylamide type paper strength enhancer, and the lubricant is made of polyethylene wax. The tissue paper container according to claim 4, which is an aqueous dispersion of wax particles. A bundle of tissue paper is a two-ply tissue paper having a basis weight of 10 to 18 g / m ² per ply, and is laminated in a pop-up type of 150 to 220 pairs, and the height of the storage box is 38 to 100 mm. The tissue paper storage body according to claim 1, wherein   The tissue paper container according to claim 1, wherein the tissue paper is provided with a chemical solution containing a polyol.

Images