JP2000336597A - Liner base paper for patterned corrugated fiberboard and patterned corrugated fiberboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a patterned corrugated fiber board liner which can be produced at a low cost without using a printing technique, and to provide a patterned corrugated fiber board. SOLUTION: This liner base paper for corrugated fiberboard is formed by a multi-layered paper-making method. Therein, at least the outermost surface layer is patterned with cotton seed shells, screen residues, or aggregates as a pattern-forming material. The aggregates are obtained by mixing a CMC aqueous solution with one or more substances selected from dyes, pigments, fillers, wood fibers, chemical fibers and then adding a metal aqueous solution to the mixture liquid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base paper for a patterned cardboard liner and a patterned cardboard. In more detail, using a base paper for liners for patterned corrugated cardboard manufactured without using printing technology, it is possible to produce corrugated cardboard with excellent appearance and quality characteristics, and a unique pattern with a new and rich design. provide.

[0002]

2. Description of the Related Art A recent trend in the corrugated cardboard industry is to make cardboard boxes smaller, more beautiful and more sophisticated. Above all, as the size of the cardboard boxes has progressed in cosmetics and luxury, the number of cases in which cardboard boxes, which have been used as boxes for transporting conventional items, are placed directly in stores has increased. For this reason, cosmetics and luxury have been promoted for the purpose of promoting fashion by making packaging fashionable and increasing the image of over-the-counter sales. Currently, 60% of cardboard boxes for fruits and vegetables are white or colored, and it is estimated that cosmetics and luxury will be further advanced in the future. 2. Description of the Related Art Conventionally, a cardboard with a pattern is manufactured by either a method of bonding fancy paper and a single-sided cardboard or a method of printing. Fancy paper is colored on the entire paper layer, contains a specially shaped material or colored substance on the entire paper layer, and is not manufactured as a liner base paper for corrugated cardboard. When it does not come out or becomes a box, it cannot function as a cardboard box. Of course, it is inevitable that the cost will be extremely high. Therefore, at present, most of cardboards with patterns are printed, and the printed patterns have regularity and the like.

Conventionally, as a pattern paper, a pattern-containing base paper containing 0.1 to 5% by weight of a cottonseed hull ground to an average particle size of 3 mm or less. (Japanese Patent Publication No. 3-27679) and wood chips are kraft-digested and then subjected to screening treatment to separate them into high-quality fibers and screen lees mainly composed of binding fibers. The paper cut into fiber lengths was mixed into pulp and formed into a patterned base paper (JP-B-53-45412).
No.), one or several kinds of substances selected from dyes, pigments, fillers, wood fibers, and chemical fibers are added to an aqueous solution of sodium carboxymethyl cellulose, and a metal aqueous solution is added to the mixture while stirring a mixture thereof. A base paper formed by adding an aggregate obtained by agglomeration to a fiber as a raw material for papermaking. (Registered Publication No. 2649851) is disclosed, but it is not disclosed that these patterned papers are used for a cardboard liner base paper. In addition, these pattern papers have the necessary paper strength as cardboard liner base paper,
There is no suitability for processing into cardboard. The cardboard made by pasting these pattern papers on the cardboard is very expensive and is not practical.

In Japanese Patent Application Laid-Open No. 9-256291, the rotation speed of a round-mesh paper machine and the rotation speed of a rotating endless belt are changed to partially displace the stock layer thick paper adhering to the rotating endless band to display the lower layer paper. There is disclosed a method for producing a patterned paper that forms an irregular pattern by being expressed on a layer surface. According to this method, an irregular pattern different from printing is formed, but the papermaking speed needs to be adjusted. Further, the finished patterned paper has a problem that it is difficult to print characters or the like due to the uneven surface. Since the present invention does not change the papermaking conditions other than the raw materials, the workability is good, and the pattern-formed body is fine or flexible or is incorporated into the paperboard liner base paper thus completed. The difference is that printing of characters and the like is easy because the surface is smooth.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and form a corrugated liner base paper with a pattern using a conventional paper machine as it is. It is intended to provide a low-priced patterned cardboard with a new and unique deep appearance by using it as it is.

[0006]

SUMMARY OF THE INVENTION The inventor of the present invention has been based on the technology of pattern paper production accumulated over many years, and has been designed with a corrugated cardboard containing various additives without adversely affecting the characteristics and functions that the cardboard base paper should have. A method for producing a liner base paper was found.

That is, the present invention includes the following inventions. (1) A cardboard liner base paper with a pattern, wherein a pattern forming body is formed at least in the outermost layer of the cardboard liner base paper formed by multilayer papermaking.

[0008] (2) A patterned cardboard manufactured by using the cardboard liner base paper.

(3) The liner base paper for a corrugated cardboard with a pattern according to (1), wherein the pattern forming body is a cottonseed shell.

(4) The liner base paper for a cardboard with a pattern according to the above (1), wherein the pattern forming body is a screen lees.

(5) The pattern forming body is prepared by adding a dye, a pigment, a filler,
Put one or several kinds of substances selected from wood fiber and chemical fiber, and stir the mixture.
The liner base paper for patterned cardboard according to (1), which is an aggregate obtained by adding an aqueous metal solution to the mixture and aggregating the mixture.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A liner base paper for patterned cardboard according to the present invention and a method for producing the same are used to separate a corrugated cardboard having a novel and unique design with excellent appearance and quality characteristics. Since the pattern paper that has been pasted in the process is manufactured in a part of the corrugated cardboard manufacturing process, it can be manufactured at a much lower cost.

The pulp used for the outermost layer of the patterned liner for corrugated cardboard in the present invention is generally used for cardboard base paper, such as NUKP, LUKP, corrugated paper, kraft paper,
Used magazine paper, NBKP, LBKP, used white paper, etc. can be used alone or as a mixture. However, in order to make the pattern more conspicuous, when the color of the additive constituting the pattern is dark, use a white raw material. When the color of the constituent additives is whitish, it is preferable to use a coloring material.

In order to produce a new and highly designable pattern, what is added to the pulp slurry as a pattern former in the present invention is cotton seed husk, screen cake, sodium carboxymethylcellulose aqueous solution, dye, pigment, filler, wood fiber, One or several kinds of substances selected from chemical fibers are added, and while stirring the mixture thereof, an aqueous metal solution is added to the mixture to form an aggregate.
Types or two or more types may be mixed.

It is preferable that the cottonseed shell, which is the pattern forming body of the present invention, is used after being crushed to a particle size of 0.1 to 3 mm. It is preferable that the thickness be 3 mm or less when used without printing as it is, and 1.5 mm or less when printing is performed. The pulverization may be performed simultaneously with the pulp at the time of beating the pulp using a refiner, a beater, or the like, or may be performed independently using a pulverizer such as a hammer mill, a ball mill, or a crusher. The content of the cottonseed shell in the patterned cardboard liner is appropriately selected depending on the purpose within the range of 0.5 to 20% by weight.

The screen residue, which is a pattern forming body of the present invention, is also available in the papermaking process. After wood chips are kraft-digested, a screening treatment is carried out to produce high-quality fibers and screen residues mainly comprising binding fibers. Obtained separately. The screen residue is used as it is or after being defibrated and cut into an appropriate fiber length. The fiber length affects paper strength, pattern, and color tone, so it is adjusted according to the purpose. The content in the patterned cardboard liner may be selected depending on the desired appearance and color tone, but is 1 to 30.
% By weight, preferably 1 to 10% by weight.

As the pattern forming body of the present invention, one or several kinds of substances selected from dyes, pigments, fillers, wood fibers, and chemical fibers are added to an aqueous solution of sodium carboxymethylcellulose, and a mixture thereof is stirred. It is an aggregate obtained by adding an aqueous metal solution to the mixture to cause aggregation. The sodium carboxymethyl cellulose aqueous solution concentration used here has fluidity by stirring,
It is necessary that the concentration is such that gelation occurs when an aqueous metal salt solution is added, and 0.5 to 2% is preferable. Dyes, pigments, fillers, and fibers are appropriately selected depending on the purpose as long as they are used in a normal papermaking process. Metal salts for making aqueous metal solutions include potassium alum, aluminum sulfate,
Examples include aluminum acetate, calcium hydroxide, ferrous sulfate, ferric chloride, zinc sulfate, barium chloride and the like. The concentration of the aqueous metal solution is preferably 1 to 10%.

Other substances that can be added to the pulp pulley containing the pattern former include wood fiber pulp, vegetable fiber pulp such as linter pulp, synthetic pulp, synthetic fiber, synthetic fiber, inorganic fiber and other chemical fiber, and ordinary papermaking. (Kaolin, diatomaceous earth, clay, talc, calcium carbonate, calcium sulfate, barium sulfate, titanium oxide, etc.), dyes, pigments, and chemicals (sizing agents, paper strength improvers, fixing agents) used for this purpose.

In the present invention, since the specially shaped object having an unspecified shape or size is irregularly distributed in the papermaking raw material in the paper making process, the patterned cardboard liner base paper of the present invention is expressed by printing. It is possible to create a unique deep pattern that cannot be done.

The liner base paper is generally made by multi-layering, and is made by joining a plurality of paper layers. The papermaking method of the patterned cardboard liner base paper of the present invention is a multi-layer round-mesh papermaking machine in the bat of the outermost layer of a plurality of bats,
In the case of a special former, the raw material of the portion to be the outermost layer is supplied, and in the case of the combination former, a raw material obtained by blending a pattern forming body with the former raw material corresponding to the outermost layer is supplied. In order to improve the design properties of the liner base paper, the pattern former may be blended with a raw material other than the outermost layer. However, since the lowermost layer requires corrugated board workability such as lamination with a core, a liner is formed by an ordinary method.

As the pulp used for the layer in which the pattern forming body is not blended, N pulp generally used for cardboard base paper is used.
UKP, LUKP, old corrugated paper, old kraft paper, old magazine paper, NB
KP, LBKP, used white paper etc. can be used alone or in combination

The corrugated cardboard liner is always processed into a corrugated cardboard structure, which is set together with the core. For this reason, in addition to the quality characteristics required for general paper, such as appearance and strength (JIS quality standards for cardboard liners), suitability for lamination and suitability for box making are required. In particular, the uniformity of the moisture and thickness profile of the liner, which greatly affects the laminating speed and warpage, the water absorption of the back surface and the surface strength of the back surface, which affect laminating speed and adhesion, are important characteristics. In addition, there are crease breaking suitability, printing suitability and the like.

In the present invention, since the back side of the liner, which governs important laminating suitability, is completed by the usual liner formulation, the suitability of the liner is not impaired. In other words, the present invention makes it possible to produce a liner base paper for cardboard without impairing the features, characteristics, and functions that the cardboard base paper should originally have.By using the patterned cardboard liner base paper of the present invention, In addition, it becomes possible to produce a highly corrugated cardboard with a rich design at low cost.

[0024]

The present invention will be described in detail with reference to the following examples, but the present invention is not limited to the following examples. In addition, the compounding ratio in an Example means a weight part or weight%.

(Example 1) A four-layer circular paper machine was used to make 220
A g / m ² liner for corrugated board was prepared. The outermost layer used was one of the four layers, and was adjusted to 55 g / m ² , which was about １ ／ of the total basis weight.
The raw material for the outermost layer was prepared by mixing and refining 50 parts of coarse linters (containing 2% hull shell), 20 parts of NBKP and 30 parts of LBKP with a refiner to a beating degree of 350 mlcsf. To 100 parts of this pulp raw material, 0.3 parts of a sizing agent and 3.0 parts of a sulfuric acid band were added, and the mixture was passed through a vertical screen and a sentry cleaner. ) Was removed to obtain a stock. For the remaining three layers, waste paper pulp with a beating degree of 300 mlcsf was used.
0.03 part of a sizing agent and 4.0 parts of a sulfuric acid band were added, and a base paper was formed by a usual method.
and m ² is applied.

(Example 2) On a four-layer circular paper machine, 220
A g / m ² liner for corrugated board was prepared. The outermost layer used was one of the four layers, and was adjusted to 55 g / m ² , which was about １ ／ of the total basis weight.
The raw material for the outermost layer was prepared by mixing 3.0 parts of screen lees fiber adjusted to an average fiber length of 5 mm with 100 parts of upper white pulp having an N / L ratio of about 50/50 and a beating degree of 300 mlcsf. The paper stock was obtained by adding 0.1 part and 3.0 parts of a sulfuric acid band. For the remaining three layers, beating degree 300mlcs
Using waste paper pulp prepared as f, 0.03 part of a sizing agent and 4.0 parts of a sulfuric acid band were added, base paper was made by a usual method, and starch was applied to the outermost surface layer at a rate of 1 g / m ² .

(Manufacture of corrugated cardboard sheet and corrugated cardboard box) The base paper made in Examples 1 and 2 was used as a base liner base paper (laminated so that the patterned surface is turned upside down). Production and further, a cardboard box was produced. A cardboard box with a new pattern was obtained.

[0028]

The patterned liner obtained by the production method of the present invention is a raw material for a patterned paper which is approximately 1/3 to 1/7 when the entire paper layer is made of the raw material for a patterned paper. It is possible to make a filled liner. In other words, the finished liner occupies about 1/3 to 1/7 of the ratio of the raw material layer for the pattern paper, so that the pattern can be added without adversely affecting the characteristics, characteristics, and functions that the cardboard liner base paper should originally have. Thus, a patterned cardboard liner base paper and a patterned cardboard having a unique and deep pattern can be obtained, which are unprecedented and cannot be desired by printing.

 ──────────────────────────────────────────────────の Continued on the front page F-term (reference) 4F100 AA06H AA07H AJ06A AJ07 AJ20A AK01A AP01A BA04 BA07 BA10A BA10D CA14A CA30 CA30A DD12A DD12B DD12C DD12D DG01A DG02 DG10A DG10B DG10A0A DG10A DG10A AJ01 AJ10 BD18 BG04 FA30 GA06

Claims (5)

[Claims] 1. A base liner for a corrugated cardboard, comprising a pattern forming body formed at least on the outermost layer of the base paper for a liner for corrugated cardboard formed by multi-layer making. 2. A patterned cardboard manufactured by using the patterned cardboard liner base paper. 3. The liner base paper for cardboard according to claim 1, wherein said pattern forming body is a cottonseed shell. 4. The liner base paper for a cardboard with a pattern according to claim 1, wherein the pattern forming body is screen waste. 5. The pattern forming body is prepared by adding one or several kinds of substances selected from dyes, pigments, fillers, wood fibers, and chemical fibers to an aqueous solution of sodium carboxymethyl cellulose, and stirring the mixture thereof. A patterned cardboard liner base paper, which is an aggregate obtained by adding an aqueous metal solution to the mixture and aggregating the mixture.