JP2001146697A - Decoration liner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decoration liner capable of providing white paper appearance and printed surface appearance, capable of providing not only beautiful but also mild and deep impression. SOLUTION: This decoration liner has 35-65%s whiteness of the surface measured by following JIS-P-8148, and a hue of the surface represented by L=70-82, (a)=(-2.5)-1.5, and b=(-2.5)-5.0, measured by following JIS-Z-8722. The decoration liner contains a waste paper in a raw material pulp, and has an aqueous composition consisting essentially of a water-based material and coated on the surface so as to form 0.01-5 g/m2 weight expressed in terms of solid per one surface. The paper layer is constituted of two or more layers, and the waste paper pulp in the surface layer is a waste paper of magazines and/or a waste paper of newspapers in the decoration liner. The surface of the surface layer of the decoration liner has >=20 s smoothness when the smoothness of the surface of the surface layer of the decorative liner is measured by following the Oken-type smoothness tester method of the Tappi paper pulp test method No.5. The decoration liner also has a material for inhibiting the bond among pulp fibers, coated thereon or included therein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic liner, and more particularly, to controlling the whiteness and the hue of a surface within a specific range, so that the appearance of a white paper and the appearance of a printed surface are deep and calm. The present invention relates to a cosmetic liner that provides a visual effect.

[0002]

2. Description of the Related Art A cosmetic liner generally refers to a liner having an excellent appearance of a blank paper or a printed surface. Conventionally, in order to achieve this, the surface layer was exposed to pulp or a blend of used white paper pulp, or a white pigment paint was applied to increase the surface whiteness. Those having an appearance with high whiteness give an effect that not only the blank surface but also the printed surface thereof looks beautiful and vivid. Therefore, it is made using such a liner,
The printed cardboard box has a high eye-catching effect and has an excellent surface that accurately represents the contents and is reminiscent of being excellent.

[0003] However, the appearance of beautiful and vivid, on the other hand, may give a deep and impressive impression in other words. A similar example is the case of coated paper. In coated papers, glossy coated papers with the highest possible gloss were first developed. Glossy ones give a beautiful and vivid impression, but on the other hand also give a less solid and deep impression. One reason for this is that in the field of coated papers, matte coated papers having the lowest possible gloss, which is the opposite of gloss, were developed. This matte-coated paper is less vivid than glossy paper, but is superior in giving a calm and deep impression. I have.

On the other hand, as described above, in the field of cosmetic liners, beautiful and vividness has been pursued, and cosmetic liners that give a calm and deep impression with the appearance of blank paper and the appearance of the printed surface have not yet been developed. Is the current situation.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cosmetic liner which gives a beautiful, calm and deep impression to a blank paper or printed surface.

[0006]

The present invention has the following configuration. 1. The whiteness of the surface measured according to JIS-P-8148 is 35-65%, and the hue of the surface measured according to JIS-Z-8722 is L = 70-82, a = -2.5.
A cosmetic liner, wherein b = -2.5 to 5.0. 2. An aqueous composition containing waste paper in the raw pulp and containing an aqueous substance as a main component on the surface is 0.01 to
The cosmetic liner according to 1, wherein the cosmetic liner is applied at 5 g / m ² . 3. 3. The cosmetic liner according to 1 or 2, wherein the paper layer is composed of two or more layers, and the surface paper pulp is used magazine paper and / or used newspaper paper. 4. J. 4. The cosmetic liner according to 1, 2, or 3, wherein the surface of the cosmetic liner has a smoothness of at least 20 seconds as measured according to the Tappi paper pulp test method No. 5 by the Oken Smoothness Tester. 5. 5. The cosmetic liner according to 1, 2, 3 or 4, wherein a substance which inhibits the bond between pulp fibers is applied or internally added.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION As a result of intensive studies, the present inventors have found that
Surface brightness of 35 to 6 according to JIS-P-8148
5% and surface hue L according to JIS-Z-8722
The value is 70 to 82, the a value is -2.5 to 1.5, and the b value is -2.
It has been found that the above problems can be achieved by setting the ratio to 5 to 5.0, and the present invention has been completed.

Although it is not clear why the object can be achieved by this means, it is presumed as described below. That is, when the whiteness of the surface is suppressed, the amount of light reflected not only from the blank surface but also from the printing surface is reduced, so that the amount of irritation to the eyes when viewing this is reduced. Therefore, it is considered that the stimulation load on the eyes is suppressed, and the vividness is reduced, but a calm and deep impression is given. The reason why a certain range of hue is preferable is presumed as follows. If any color arrives on the surface, the color of the printing surface will be affected by the color of the surface, resulting in a color tone different from the original color tone of the printing ink,
The print surface becomes cloudy. Therefore, it is considered that the above-mentioned problems can be prevented if the color tone is a medium colorless hue.

The details will be described below. The whiteness of the surface of the cosmetic liner is preferably 35 to 65%, preferably 40 to 65%.
~ 55%. Here, if the whiteness is less than 35%, it lacks beauty. On the other hand, if it exceeds 65%, it is too vivid and lacks a calm depth.

The hue is L = 70-82, a = -2.5-1.5.
5, the range of b = −2.5 to 5.0 is good, and if it is out of this range, the color tone will be different from the original color tone of the printing ink,
The print surface becomes cloudy. The printing method adopted is flexographic printing, gravure printing, offset printing, etc., and the ink can be arbitrarily selected whether solvent-based or water-based,
If the pre-printing is performed by printing the liner in advance, the printing effect will be better.

Here, various methods can be applied as a method for obtaining the above-mentioned whiteness and hue, for example, a method of adjusting a single or mixed pulp system, a method of applying a coloring pigment,
There are a method of applying or internally adding a coloring dye, a method of solid printing, and the like. Further, these methods may be combined.

The pulp to be used can be appropriately selected according to the required characteristics. For example, there are unpulled and unpulled mechanical pulp and chemical pulp wood pulp, non-wood pulp and waste paper pulp such as magazine waste paper, newspaper waste paper, office waste paper, information paper waste paper, cardboard waste paper, paper container waste paper, and the like. These pulp may be used alone or in combination of two or more kinds as long as the whiteness and hue of the surface of the liner of the present invention fall within the above ranges. In addition,
Magazine wastepaper and newspaper wastepaper are single pulp without deinking treatment and bleaching treatment in wastepaper processing, and generally have whiteness and hue within or close to the range specified in claim 1,
It can be used preferably. Furthermore, since it does not perform deinking and bleaching treatments, it has a very small impact on the environment, contributes to the recycling of paper and paperboard, and greatly contributes to the environment and waste problems.

[0013] Internal additives may be used as needed, for example, sizing agents such as sulfated bands and rosin, paper strength agents such as polyamide and starch, drainage retention enhancers such as polyamide, and water-resistant agents such as polyamidepolyamine epichlorohydrin. Agents, defoamers, fillers such as talc, dyes and the like.

The present cosmetic liner may be formed into a single layer or a plurality of layers, either in combination. In particular, it is particularly preferable to use two or more layers in order to control the hue and whiteness of the surface and to secure the balance of strength as a liner. In other words, the surface layer mainly has the visual function of hue and whiteness and the printability function, and the layers other than the surface layer mainly have the strength function required when the liner is formed into a corrugated ball box. Since the functions can be differentiated, the visual effect, the printability effect, and the strength effect can be balanced at a high level.

An aqueous composition containing an aqueous substance as a main component may be applied to the surface of the liner. By applying this, printing suitability such as ink deposition property, ink color density, and ink picking resistance can be improved, which is more preferable. Here, as the aqueous substance, a material usually used in this field can be used. Examples include polyacrylamide and its derivatives, polyvinyl alcohol, cellulose derivatives, starch, modified starch, latexes such as polystyrene-butadiene, acrylic, and polyvinyl acetate, and wax emulsions. These are
A single system or a mixture of two or more systems may be used.

The solid content of the aqueous composition is 0.01-5.
preferably g / m ^2, in particular 0.01 to 1 g / m ² are preferred. That is, if the amount is less than 0.01 g / m ² , the effect of improving the printability is not significant, and if it exceeds 5 g / m ² , the effect of improving the printability is almost saturated. Inorganic pigments in the aqueous composition,
White or colored components such as organic pigments and dyes can also be compounded and added. In this case, the coating amount is preferably about 1 to 15 g / m ² . Of course, it can also be used for hue control.

The method of applying the aqueous composition includes, for example, various coaters, water doctors for machine calendars, spray coating and the like. This may be an online process on a paper machine or an offline process.

When a substance that inhibits the bond between pulp fibers is applied or internally added, if stress is applied to the pulp sheet, a deviation occurs between the pulp fibers and stress relaxation occurs. This stress relaxation mechanism improves the ruled line cracking resistance when a ruled line is inserted and bent in the paperboard. When compounded with newspaper or magazine wastepaper pulp that has a high proportion of pulp with a short pulp fiber length, ruled line cracking is likely to occur. Can be improved. Here, any substance may be used as long as it inhibits the bonding between pulp fibers, and examples thereof include waxes, surfactants described in JP-A-11-200279, alkyl ketene dimer, alkenyl succinic acid, fillers and the like. There is. In particular, surfactants described in JP-A-11-200279 can be suitably used.

In addition, according to various calendars and the like, J.I. Ta
It is preferable that the smoothness of the surface of the cosmetic liner measured according to the ppi paper pulp test method No. 5 be 20 seconds or more, because the ink adhesion property is particularly improved. Among calenders, a soft nip calender is a preferable treatment method because it can reduce bulk and increase smoothness.

[0020]

EXAMPLES The present invention will be described below in detail with reference to examples, but the present invention is not limited to these examples. The numerical values indicating the composition, concentration, etc. are numerical values based on the mass of the solid component or the active ingredient.

Example 1 As a surface pulp, whiteness was 48.4% and hue was L =
A pulp slurry was prepared by using 100% of recycled paper pulp with 75.8, a = 0.03 and b = 1.38, and a sulfuric acid band of 2 kg / pulp (air-dried, the same applies hereinafter) t, size pine G (rosin) Size, Arakawa Chemical Co., Ltd.) added at 2 kg / pulp t.
A pulp slurry was prepared using a mixture of UKP = 7/3, and 2 kg / pulp t of a sulfate band and 3 kg / pulp t of Polystron 117 (paper strength enhancer, Arakawa Chemical) were added. The back layers are each made of paper, combined, pressed, dried, machine calendered, and weighed 220 g
/ M ² liner samples were obtained. The basis weight of each layer in this case the surface layer is 70 g / m ^2, middle is 70 g / m ^2, the backing layer 80
g / m ² . The surface of this liner sample is subjected to process printing in black, indigo, red, and yellow with a flexo printing machine,
The visual evaluation of the blank area and the printed surface was performed by five monitors. Further, the white area ratio of the solid black portion was measured by an image analyzer, and this was used as an index of ink adhesion. Further, as described in Japanese Patent Application Laid-Open No. H11-200279, the liner sample is dried to a completely dry state by a dryer, folded in half with the surface facing outward, and passed through a laboratory mini-calender set to a predetermined clearance. The crack length of this broken portion was measured, and the crack length ratio was determined from the following equation. The crack length ratio was used as an index of the ruled line cracking suitability. Crack length ratio (%) = [Total crack length (mm) / length of entire sheet (mm)] × 100 In addition, the liner sample was pre-treated according to JIS-P-8111. Tappi paper pulp test method No.
The surface smoothness was measured according to the Oken type smoothness tester method of No. 5. In addition, JIS-P-8148 and JIS-Z-
The whiteness and hue of the sample surface were measured according to 8722. Table 2 shows the results.

Examples 2, 3, 4, 5, and 6 A liner sample was obtained in the same manner as in Example 1 except that the conditions described in Table 1 were changed. The sample was evaluated in the same manner as in Example 1. The results are shown in Table-2.

Comparative Examples 1, 2, 3, 4 A liner sample was obtained in the same manner as in Example 1 except that the conditions described in Table 1 were changed. The sample was evaluated in the same manner as in Example 1. The results are shown in Table-2.

[0024]

[Table 1] (Note 1) Whiteness and hue of used newspaper pulp [Whiteness: 4
2.6%, L = 72.8, a = -1.52, b = 3.32] (Note 2) Whiteness and hue of used flyer pulp [whiteness: 5]
3.9%, L = 77.2, a = 0.69, b = -2.13] (Note 3) Whiteness and hue of NUKP [Whiteness: 19.6
%, L = 66.2, a = 6.53, b = 18.5] (Note 4) Whiteness and hue of NBKP [Whiteness: 87.8]
%, L = 96.3, a = -0.52, b = 2.50] (Note 5) Whiteness and hue of LBKP [Whiteness: 88.3
%, L = 95.3, a = -0.52, b = 4.21] (Note 6) Whiteness and hue of white art waste paper pulp [whiteness:
79.8, L = 92.4, a = 0.24, b = 1.87] (Note 7) Kuraray Poval PVA-
117 (manufactured by Kuraray) was applied to the surface at a solid content of 0.5 g / m ² . (Note 8) Sofnon P400 (cationic surfactant, manufactured by Toho Chemical Industry) is added to the surface layer of the crease break prevention agent at 5k.
g / pulp t.

[0025]

[Table 2] (Note 1) The print sample was shown on a monitor of 35 persons, asked about the four items shown in Table 2 as visual evaluation of the blank part and the printed surface, and asked to answer "yes" or "no".
The results were tabulated, and the number of respondents who answered "yes" was ranked as follows. ◎: 31 to 35 people ○ to ：: 26 to 30 people ○: 21 to 25 people △ to ○: 16 to 20 people △: 11 to 15 people × to Δ: 6 to 10 people ×: 0 to 5 people

[0026]

According to the embodiment satisfying the requirements of the present invention, a deep and subdued visual effect is provided.
It is excellent and beautiful.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor: Naoaki Furusaka 4-7-5, Ginza, Chuo-ku, Tokyo Inside Oji Paper Co., Ltd. F Term in Matsumoto Mill of Paper Mills Co., Ltd. (Reference) 4L055 AA11 AC09 AG35 AG64 AH29 AH37 AH50 AJ01 BD16 BE09 EA11 FA30 GA06 GA15

Claims (5)

[Claims] A whiteness of a surface measured according to JIS-P-8148 is 35 to 65%, and JIS-Z-872.
The hue of the surface measured according to 2 is L = 70-82, a =
A cosmetic liner, wherein -2.5 to 1.5 and b = -2.5 to 5.0. 2. An aqueous composition containing waste paper in the raw pulp and having an aqueous substance as a main component on the surface, with a solid content per one side,
^{2. The method according} to claim 1, wherein the composition is applied in an amount of 0.01 to 5 g / m ^2.
A cosmetic liner as described. 3. The cosmetic liner according to claim 1, wherein the paper layer is composed of two or more layers, and the surface waste paper pulp is used magazine paper and / or used newspaper paper. 4. The method according to Tappi paper pulp test method No.5
The cosmetic liner according to claim 1, 2 or 3, wherein the surface roughness of the surface of the cosmetic liner measured according to the Oken Smoothness Tester is 20 seconds or more. 5. The cosmetic liner according to claim 1, wherein a substance that inhibits the binding between pulp fibers is applied or internally added.