JP6571372B2 - Design paper - Google Patents

Description

  The present invention relates to a high-quality design paper having a unique texture.

  Design paper is used in a wide variety of fields such as book covers, flips, commercial art prints, packages, packaging materials, and building materials. In recent years, due to diversification of user needs and the like, design papers are required to have a high feel such as touch. The word “texture” is often used to express these sensuous paper quality. The texture of the paper is evaluated based on the tactile sensations such as the lightness and feel of the paper. As an index related to tactile sensation, a cold feeling (heat transfer) that is felt when a person touches an object is known, and this is quantified as a maximum initial heat flux. This initial heat flux maximum value is also called Qmax, and is a characteristic that the smaller the numerical value, the warmer the feeling, and the larger the value, the cooler.

With regard to the technology focused on Qmax, for example, Patent Document 1 discloses that Qmax on one side of a fabric as a textile product used for underwear is 120 W / m ² · ° C or higher, preferably 120 W / m ² · ° C or higher and 190 W / m ^2. -It is described that it is preferable that the temperature is not higher than ° C., because it is possible to feel cool and refreshed at the moment of contact with the dough. Patent Document 2 discloses that a moisture retention non-woven fabric for wet tissue has a Qmax of 0.08 to 0.30 [J / cm ² / sec], so that sufficient smoothness, flexibility and moist feeling can be obtained. It is stated that Patent Document 2 [0024] also describes that Qmax is appropriately adjusted according to the characteristics required of the moisturizing nonwoven fabric, and the moisturizing nonwoven fabric is required to be soft and have a smooth and smooth touch. In this case, the Qmax is set to 0.09 to 0.115 [J / cm ² / sec], and when the moisturizing nonwoven fabric is required to have a moist feeling and a moisturizing effect on the skin, the Qmax is set to 0.115 to 0.20 [J / cm ² / sec].

Qmax is applied not only to the cloths described in Patent Documents 1 and 2, but also to paper. For example, Patent Document 3 describes that in an embossed crepe paper product, the Qmax is set to 0.17 [J / cm ² / sec] or less. According to Patent Document 3, the crepe paper product described in Patent Document 3 does not feel uncomfortable coldness even though it contains a moisturizing component and has a large amount of moisture because Qmax is in such a range. It is said that. The crepe paper product described in Patent Document 3 is a paper mainly used for wiping as sanitary paper such as toilet paper and tissue paper, and printability is not particularly considered.

JP 2014-139355 A JP 2008-208491 A JP 2010-259706 A

  An object of the present invention is to provide a design paper having a high-quality feeling due to a unique touch feeling that feels good and feels soft, soft and warm when touched with a finger.

The present invention is a design paper having a maximum initial heat flux value of 0.300 to 0.377 W / cm ² .

  ADVANTAGE OF THE INVENTION According to this invention, the design paper with a favorable feel, a soft feeling, a soft feeling, warmth is felt when touched with a finger, and a high-class feeling is provided by those peculiar tactile sensations. The design paper of the present invention includes a form having a base paper and a coating layer formed on one side thereof. In particular, according to such a form, the coating layer improves printability and provides a moist feeling. Therefore, a high-quality design paper with a further improved texture and a high-class feeling can be obtained.

The design paper of the present invention has an initial heat flux maximum value (Qmax) of 0.300 to 0.377 W / cm ² . When Qmax of the design paper is within such a specific range, softness, softness, and warm touch can be obtained. Qmax of the design paper of the present invention is preferably 0.310 to 0.377 W / cm ² , more preferably 0.320 to 0.377 W / cm ² .

  The initial heat flux maximum value (Qmax) can be measured by a known method. Qmax is measured by storing heat in a heat plate such as a metal plate with a temperature sensor, setting the temperature of the heat plate to be higher than that of the measurement object, bringing the heat plate into contact with the surface of the measurement object, This is carried out by measuring the peak value of the heat flux when the amount of heat stored in the hot plate moves to the low-temperature measurement object immediately after contact. The smaller the value of Qmax, the warmer the measurement object is felt, and the larger the value of Qmax, the colder the measurement object. Qmax is measured using a commercially available measuring device, specifically, for example, “KES-F7 Thermolab II Type Precision Rapid Thermophysical Property Measuring Device” or “FR-07 Finger Robot Thermolab” manufactured by Kato Tech Co., Ltd. Can be done by the method.

<Measurement method of initial heat flux maximum value (Qmax)>
The measurement object (design paper) was allowed to stand in an environment at room temperature of 23 ° C. and a relative humidity of 50% for 1 hour, and then in such an environment, the Kate-Tech KES-F7 or FR-07 was used. Measure Qmax of the measurement object according to the measurement manual. For example, when KES-F7 is used, a pure copper plate having an area of 9 cm ² and a mass of 9.79 g is used as the hot plate to be brought into contact with the measurement target, and the initial temperature of the copper plate is 33 ° C. (10% higher than the surface temperature of the measurement target). ℃ high temperature), the contact pressure of the copper plate to the measurement object is 0.981 kPa, the copper plate is brought into contact with the surface of the measurement object (one side of the design paper), and the peak of the heat flux after 0.2 seconds have elapsed after contact Measure the value. This measurement is performed three times for each measurement target surface, and an average value of the plurality of measurement values is defined as Qmax of the measurement target surface. The “0.2 seconds after contact” described above takes into account the time required to feel the cold feeling after the finger touches the object. The measuring method using FR-07 can also be performed according to the measuring method using KES-F7. However, since the measurement method using FR-07 is performed by the measurer holding the FR-07 with his hand and pressing the contact against the measurement target, the contact pressure on the measurement target is an arbitrary pressing force by the measurer. It becomes. The numerical value of Qmax described in this specification is based on a measurement method using FR-07 unless otherwise specified.

As a preferred embodiment of the design paper of the present invention, specific coated paper having a base paper and a coating layer formed on one side of the base paper can be mentioned. This specific coated paper has a Qmax on the surface of the coated layer in the range of 0.300 to 0.377 W / cm ² as described above, and the printability is improved as compared with plain paper without the coated layer. At the same time, a moist feeling on the surface of the coating layer is imparted, and a moist feeling on the surface of the coating layer is added, whereby the touch feeling on the surface of the coating layer can be further improved. The reason why a specific coated paper (design paper) is moistened by the formation of the coating layer is that the finger touching the surface of the coating layer due to a decrease in the air permeability of the entire paper due to the formation of the coating layer It is presumed that this is because the evaporated water due to the insensitive digestion of the skin tends to stay between the skin and the surface of the paper coating layer. Hereinafter, the specific coated paper will be described.

  As the base paper constituting the specific coated paper, basically, any sheet that can be coated with a coating layer can be used, and mainly pulp such as high-quality paper, medium-quality paper, paperboard, and Japanese paper. In addition to paper, synthetic paper, non-woven fabric, resin film, synthetic fiber paper, and the like can be used. However, from the viewpoint of setting Qmax on the surface of the coating layer in the specific range, paper mainly composed of pulp is preferable. The kind of pulp blended in the base paper is not particularly limited. For example, softwood bleached kraft pulp (NBKP), hardwood bleached kraft pulp (LBKP), softwood bleached sulfite pulp (NBSP), thermomechanical pulp (TMP), groundwood pulp Wood pulp such as (GP); non-wood pulp such as hemp, bamboo, cocoon, kenaf, trifoam, cocoon, and cotton; modified pulp such as cationized pulp and mercerized pulp, and the like. Alternatively, two or more kinds can be used in combination.

The density of the base paper constituting the specific coated paper is a factor that greatly affects Qmax on the surface of the coated layer. In general, the texture of paper is evaluated based on the tactile sensation such as the lightness and feel of paper, and in order to realize the `` softness, softness, warm touch '' pursued in the present invention, The lower the density of the paper, the better the unevenness should be felt. However, if the density of the paper is too low, the quality and quality may be impaired due to a decrease in weight feeling, and further, the suitability for processing such as printing may be reduced. Considering these comprehensively, from the viewpoint of surely setting the Qmax on the surface of the coating layer within the specific range, the density of the base paper is preferably 0.55 to 0.67 g / cm ³ , more preferably 0.00. 57 to 0.67 g / cm ³ . The density of the base paper here is a density measured according to JIS P8118.

  From the viewpoint of setting the density of the base paper constituting the specific coated paper within the above range, the pulp freeness (CSF) contained in the base paper is preferably 280 to 500 ml, more preferably 330 to 450 ml. Freeness is a value obtained by the Canadian standard form among the methods for testing the freeness of pulp specified in JIS P8121. Freeness can be adjusted by appropriately adjusting the degree of beating of the pulp.

  The base paper constituting the specific coated paper may be heavy calcium carbonate, light calcium carbonate, kaolin, calcined kaolin, clay, talc, silica, titanium oxide, white carbon, aluminum oxide, plastic, if necessary, in addition to pulp. Pigment fillers or composites thereof; paper strength enhancers or fixing agents such as starch, polyacrylamide, and polyamine polyamide epichlorohydrin; One or two or more of a drainage yield improver, a fixing agent such as a sulfuric acid band, a dye, a fluorescent whitening agent, an antifoaming agent, and a slime control agent may be contained.

The paper making conditions of the base paper constituting the specific coated paper are not particularly limited. For example, a known paper machine such as a long net paper machine, a gap former type paper machine, a circular net paper machine, or a short net paper machine. Can be appropriately selected according to the purpose. In order to obtain a base paper having a low density and excellent texture, it is preferable that a calendar is not used. Further, if necessary, embossing may be applied to the base paper before forming the coating layer without departing from the spirit of the present invention, and the embossing method in that case is not particularly limited. Then, the dry embossing method in which press molding is performed between the rolls engraved with the pattern, the water mark method in which the wet part of the circular paper machine or the dandy roll of the long paper machine is used, and the press in which the press part is molded. Any method such as a mark method or a wet embossing method that is formed after the press part may be used. As the papermaking method, any method such as acidic papermaking, neutral papermaking, and weak alkali papermaking can be used. The basis weight of the base paper is not particularly limited, but is preferably 50 to 300 g / m ² .

  As an example of what is preferably used as a base paper in the present invention, “a bleaching composition comprising pulp and calcined kaolin and / or silica, and 70% by mass or more, preferably 80% by mass or more of the pulp is made from eucalyptus. Examples thereof include “base paper that is kraft pulp” (hereinafter also referred to as specific base paper). By using such a specific base paper, it is possible to reliably set Qmax on the surface of the coating layer within the specific range.

  Examples of eucalyptus used as a pulp raw material for the specific base paper include, for example, E.I. camaldulensis, E .; citriodora, E .; deglupta, E.I. globulus, E.I. grandis, E .; maculata, E .; punctata, E .; saligna, E .; terericornis, E .; urophylla or a hybrid of these can be used. Bleached kraft pulp made from eucalyptus, which is the main component of the specific base paper, can be produced by a known kraft cooking method or pulp bleaching method using these eucalyptus.

  Further, the specific base paper may contain both calcined kaolin and silica, or only one of them. The total content of calcined kaolin and silica in the specific base paper is preferably 5% by mass or more, and more preferably 7 to 13% by mass with respect to the total mass of the specific base paper. The calcined kaolin is obtained by releasing crystal water existing in the crystal structure of kaolin by subjecting kaolin produced in nature to high heat treatment (eg, heat treatment at about 800 ° C. using a kiln or the like). Collapses to have an amorphous structure. As silica, synthetic amorphous silica is preferably used. Synthetic amorphous silica is roughly classified into those produced by a dry method and those produced by a wet method. The former includes dry silica, and the latter includes wet silica, silica gel, and colloidal silica. The primary average particle diameter of the calcined kaolin and the secondary average particle diameter of silica are each preferably 1 to 30 μm. If the primary average particle size of the calcined kaolin and the secondary average particle size of the silica are too small, a sufficient low density effect cannot be obtained, and if the primary average particle size of the calcined kaolin and the secondary average particle size of the silica are too large, The smoothness of the coating layer surface is remarkably deteriorated and the printing uniformity is lowered.

  Moreover, as a coating layer which comprises the said specific coated paper, what can be formed in the paper surface by coating for the purpose of the improvement of printability etc. can be especially used without a restriction | limiting. The method for forming the coating layer is not particularly limited. For example, contact coating methods such as air knife coater, blade coater, bar coater, roll coater, rod coater, gravure coater; curtain coater, spray coater, slot die coater, etc. Non-contact coating method is mentioned. Particularly preferable among these coating methods is a non-contact coating method in which a coating liquid is supplied without physically contacting the base paper, and it is particularly preferable to form a coating layer using a curtain coater. . A curtain coater is a coating device that forms a curtain coating film by flowing the coating liquid in a curtain shape, and passes the base paper through the curtain coating film to provide a coating layer on the base paper. It has the feature that contour coating that follows the unevenness of the coated surface can be performed. By forming a coating layer using a non-contact coating method, especially using a curtain coater, on a base paper having a low density and moderate irregularities such that the density is in the above range, moderate irregularities similar to the irregularities of the base paper can be obtained. As a result, the contact area between the paper and the skin is reduced, and the Qmax on the surface of the coating layer can be reliably set according to the specific range. The solid content concentration of the coating liquid applied to the base paper by the non-contact coating type coating apparatus is usually 30 to 70% by mass.

That is, as a preferred specific example of the specific coated paper which is an embodiment of the design paper of the present invention, the density of the base paper measured according to JIS P8118 is 0.55 to 0.67 g / cm ³ , and Examples thereof include a coating layer formed by a non-contact coating method, more preferably a curtain coater.

The coating layer constituting the specific coated paper usually contains a filler and an adhesive. The filler coating layer, mosquitoes Olin, acid titanium, precipitated calcium carbonate, inorganic pigments heavy carbonate calcium; organic pigments such as plastic pigments and the like, alone, or two or more of these one Can be used in combination. The light calcium carbonate may be either calcite or aragonite, and the shape may be any of acicular, columnar, spindle, spherical, cubic, and rosetta types. Among these fillers for coating layers, calcium carbonate is particularly preferably used in the present invention because it is inexpensive and has high whiteness. Although content of the filler in a coating layer is not specifically limited, It can use suitably in 10-95 mass% suitably in conversion of solid content with respect to the total mass of a coating layer.

  In addition, as the adhesive for the coating layer, a water-dispersible or water-soluble adhesive usually contained in the coating layer of this type of coated paper can be used without particular limitation, and one of these can be used alone. Alternatively, two or more kinds can be used in combination. Examples of water-dispersible adhesives include conjugated diene copolymer latexes such as styrene-butadiene copolymer latex, methyl methacrylate-butadiene copolymer latex, styrene-methyl methacrylate-butadiene copolymer latex, and acrylate esters. And / or acrylic polymer latex such as a polymer or copolymer latex of a methacrylic acid ester, vinyl polymer latex such as ethylene-vinyl acetate polymer latex, or a functional group such as a carboxyl group. Examples thereof include a polymer or copolymer latex modified with a group-containing monomer. Examples of the water-soluble adhesive include starches such as polyvinyl alcohol, oxidized starch, positive starch, esterified starch, and dextrin. Although content of the adhesive agent in a coating layer is not specifically limited, It uses suitably in the range of 5-50 mass parts in conversion of solid content with respect to 100 mass parts of all the fillers of a coating layer. be able to.

  The coating layer in the specific coated paper may contain other components other than the filler and the adhesive, for example, various agents for improving the coating suitability usually contained in this type of coating layer. it can. In particular, the coating layer formed by a non-contact coating type coating apparatus such as a curtain coater preferably contains a surfactant. That the surfactant is contained in the coating layer formed by the non-contact coating type coating apparatus means that the surfactant is contained in the coating liquid to be applied by the coating apparatus. As a result, the dynamic surface tension of the coating liquid is thereby lowered, so that, for example, when the coating liquid is applied to the base paper using a curtain coater, the curtain coating film is further stabilized. In particular, in coating on uneven base paper, the leveling property of the coating liquid is further enhanced, and contour coating following the base paper unevenness can be performed. Therefore, when the coating layer contains a surfactant, the moist feeling on the surface of the coating layer can be further improved.

  The surfactant that can be contained in the coating layer may be any of an anionic surfactant, a cationic surfactant, and a nonionic surfactant, and in particular, a carboxylate, a sulfonate, a sulfate ester salt, Anionic surfactants such as phosphate ester salts are preferably used in the present invention because of their good compatibility with the coating solution. The content of the surfactant in the coating layer is preferably 0.03 to 0.30% by mass, more preferably 0.05 to 0.20% by mass in terms of solid content with respect to the total mass of the coating layer. %. If the content of the surfactant in the coating layer is too small, the predetermined effect is not sufficiently achieved. On the other hand, if the content is too large, the permeability of the coating liquid to the base paper becomes too high. There is a possibility that the printing uniformity of the ink is reduced.

The design paper of the present invention may have an initial heat flux maximum value in the specific range, and may not have a coating layer. Further, when the design paper of the present invention has a coating layer such as the specific coated paper, the coating layer may be formed only on one side of the base paper, or may be formed on each of both sides, In addition, a single layer structure or a multilayer structure in which two or more layers are stacked may be used. The basis weight of the coating layer on one side of the base paper is preferably 5 to 20 g / in terms of solid content as the basis weight of the entire coating layer regardless of whether the coating layer is a single layer structure or a multilayer structure. m ² , more preferably 7 to 16 g / m ² .

  The design paper of the present invention can be applied to various uses utilizing its unique texture, and examples thereof include printing paper and wrapping paper.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated further in detail, this invention is not restrict | limited by a following example.

[Example 1]
As a pulp, 100% by mass of bleached kraft pulp made from eucalyptus was used, and a double pulp refiner was used to prepare a raw pulp slurry having a beating degree of 380 ml according to Canadian Standard Freeness. To this raw material pulp slurry, 7% by mass of calcined kaolin (manufactured by BASF, Ansilex 93), 5% by mass of wet silica (manufactured by Grace, Psyloid 74X4500), and 0.2% by mass of rosin sizing agent in solid content concentration are added. A raw material slurry is prepared (the added amounts of calcined kaolin, wet silica, and rosin sizing agent are all added to the weight of pulp), and this raw material slurry is subjected to wet papermaking according to a conventional method to obtain a density of 0.60 g / cm. ³ A base paper having a basis weight of 100 g / m ² was obtained.
Separately, a coating solution having a solid content concentration of 45% by mass was prepared. Contains 50 parts by weight of light calcium carbonate (trade name: Tama Pearl TP221GS, manufactured by Okutama Kogyo Co., Ltd.) as a filler and 50 parts by weight of heavy calcium carbonate (trade name: FMT-OP2A, manufactured by Phimatech), and phosphoric acid as an adhesive Esterified starch (trade name: MS # 4600, manufactured by Nippon Food Processing Co., Ltd.) 5 parts by mass, styrene-methyl methacrylate-butadiene copolymer latex (trade name: PA3803, manufactured by Nippon A & L Co., Ltd.), 15 parts by mass, surfactant ( (Product name: SURFYNOL PSA336, manufactured by AIR PRODUCTS) A coating solution containing 0.10 parts by mass was prepared.
And using the curtain coater, the said coating liquid was apply | coated to each of both surfaces of the said base paper, the coating layer was formed, and the coated paper which has the coating layer of a single layer structure on each of both surfaces of a base paper was obtained. The coating amount was the same on both sides of the base paper and was 10 g / m ² in terms of solid content.

[Example 2]
In Example 1, the coating layer was formed using an air knife coater that was a contact coating type coating apparatus instead of the curtain coater that was a non-contact coating type coating apparatus. Thus, a coated paper having a coating layer having a single-layer structure with a coating amount of 10 g / m ² was obtained on both surfaces of the base paper.

[Comparative Example 1]
In Example 1, a coating layer having a single layer structure with a coating amount of 10 g / m ² was formed on both sides of the base paper in the same manner as in Example 1 except that the content of wet silica in the base paper was 15% by mass. A coated paper having was obtained.

[Comparative Example 2]
In Example 1, the wet silica content in the base paper was set to 12% by mass, and the entire base paper before coating was smoothed with a calendar in the same manner as in Example 1 except that the both sides of the base paper were coated. A coated paper having a coating layer having a single layer structure with a work amount of 10 g / m ² was obtained.

[Comparative Example 3]
In Example 1, a coating layer having a single-layer structure with a coating amount of 10 g / m ² was formed on both sides of the base paper in the same manner as in Example 1 except that the entire base paper before coating was smoothed with a calendar. A coated paper having was obtained.

〔Evaluation test〕
About the coated paper (design paper) of an Example and a comparative example, while measuring Qmax on the surface of a coating layer by the said method, tactile sense and printability (printing strength) were evaluated by the following method, respectively.

[Tactile evaluation method]
The surface of the coated paper to be evaluated (coating layer surface) was directly contacted by 10 panelists with fingers, and evaluated according to the following evaluation criteria. The evaluation results (average score of 10 panelists) are shown in Table 1 below.
(Evaluation criteria for tactile sensation: 4 points or more pass)
5 points: Soft, soft and warm enough, very good.
4 points: soft, soft and warm, good.
3 points: Softness, soft feeling, almost no warmth, not possible.
2 points: Softness, soft feeling, no warmth, poor.
1 point: There is no softness, soft feeling, warmth, and extremely poor.

[Method for evaluating printability]
Four-color printing was performed at a printing speed of 8,000 sheets / hour on the coated layer surface of each 10,000 coated paper to be evaluated using an offset sheet-fed printing machine, and then the blanket was visually checked. Observed and evaluated based on the following evaluation criteria.
(Evaluation criteria for printability: ◎ and ○ pass)
(Double-circle): Blanket dirt is not seen at all and is very good.
○: Blanket dirt is hardly seen and is good.
(Triangle | delta): Blanket dirt is seen and it is bad.
X: Blanket dirt is very conspicuous and defective.

As shown in Table 1, the coated paper of each example in which the Qmax is within a specific range of 0.300 to 0.377 W / cm ² , compared with the comparative examples where the Qmax is not within the specific range, Both tactile feel and printability are compatible at a higher level. From this, 1) it is possible to evaluate both the tactile sensation and printability of the coated paper by paying attention to the Qmax on the surface of the coated layer of the coated paper, and 2) when the printability is good and touched with fingers. In order to obtain a coated paper (design paper) having a unique touch feeling that can feel softness, softness and warmth, the Qmax on the surface of the coating layer is about the same as each example (0.300 to 0.00). It can be seen that it is effective to adjust to 377 W / cm ² ).

The reason why Qmax of Comparative Examples 1 and 3 is not within the specific range is presumed to be that the density of the base paper is out of the specific range of 0.55 to 0.67 g / cm ³ .
The reason why the density of the base paper in Comparative Example 3 is higher than the specific range is because of a smoothing process using a calendar.
On the other hand, the reason why the density of the base paper in Comparative Example 1 is lower than the specific range is presumed to be due to the influence of the content of the specific filler in the base paper. That is, the base paper in each Example has a total content of calcined kaolin and silica of 12% by mass (= 7% by mass of calcined kaolin + 5% by mass of wet silica), whereas the base paper in Comparative Example 1 has the total content. The content is 22% by mass (= 7% by mass of calcined kaolin + 15% by mass of wet silica), resulting in higher bulk and lower density than the base paper in each example. From this, in order to set Qmax on the coating layer surface within the specific range, it is understood that the total content of calcined kaolin and silica in the base paper is preferably about 7 to 13% by mass as described above. .

In Comparative Example 2, although the density of the base paper is within the specific range, Qmax is not within the specific range. The reason is presumed that the smoothness of the base paper, which is the surface to be measured, has increased the smoothness of the coating layer surface, which is the measurement target surface. Then, in consideration of the result of Comparative Example 3, it is understood that it is better not to perform a smoothing process such as a calendar on the base paper in order to set the Qmax on the surface of the coating layer within the specific range.
In Comparative Example 2, since the total content of calcined kaolin and silica in the base paper is relatively high at 19% by mass (= 7% by mass of calcined kaolin + 12% by mass of wet silica), the density of the base paper is low as it is. Therefore, the density is adjusted to increase the density of the base paper by the calendar process.

Claims (4)

A base paper and a coating layer formed on one side thereof, the initial heat flux maximum value of the surface of the coating layer is 0.300 to 0.377 W / cm ² ;
The base paper contains one or more fillers selected from the group consisting of calcium carbonate, kaolin, calcined kaolin, talc, silica, titanium oxide and aluminum oxide, and has a density of 0.55 to 0.67 g / cm ³ . There is no smoothing process by the calendar,
The coating layer is composed of one or more fillers selected from the group consisting of kaolin, titanium oxide, calcium carbonate and organic pigments and an adhesive , or composed of kaolin, titanium oxide, calcium carbonate and organic pigments. A design paper comprising at least one filler selected from the group, an adhesive, and a surfactant . The base paper contains at least one of calcined kaolin and silica as the filler,
The design paper according to claim 1, wherein a total content of the calcined kaolin and silica in the base paper is 5 to 13% by mass with respect to the total mass of the base paper.   The design paper according to claim 1 or 2, wherein the base paper contains pulp, and 70 mass% or more of the pulp is bleached kraft pulp using eucalyptus as a raw material.   The design paper according to any one of claims 1 to 3, wherein the coating layer is formed by a non-contact coating method.