JP2005344230A - High quality japanese paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new high quality-designed Japanese paper having a mixed color and luster of its base layer, fibers and pearly pigment, improving the depth of fibrous feeling and mixed color feeling, and having a deep pearly luster, and also a high quality Japanese paper suitable for uses such as an interior finishing material, an interior article, a packaging material, etc., and having the deep fibrous feeling, mixed color feeling and pearly luster capable of performing a representation which does not exist in conventional Japanese paper. <P>SOLUTION: This Japanese paper is produced by making a mixed paper of the base layer consisting of pulp, and a designing layer consisting of natural original grass fibers and/or chemical fibers and a pearly pigment is characterized by having 1-300 mm length natural original grass fibers or chemical fibers and 5-100 g/m<SP>2</SP>unit weight of the pearly pigment. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a Japanese paper in which a novel design layer composed of natural raw fiber and / or chemical fiber and a pearl pigment is combined on a base layer. More specifically, the present invention relates to a high-quality Japanese paper having a deep sense of fiber, color mixing, and pearly luster.

Japanese paper has a unique texture and luxury and has recently been reviewed as an environmentally friendly product made from plant-derived materials. Traditionally, there was a Japanese paper called cloud flow paper made from the bast fibers of plants such as Kozo, Mitsumata and Gamppi. For this reason, Japanese paper containing small amounts of straw, mulberry, cedar, kenaf, bamboo, etc. has been proposed. Each of these Japanese papers is made by mixing small fibers with large fibers of different colors and spreading the large fibers with water. However, such a conventional scattering pattern is obtained by mixing a little natural fiber into Japanese paper, and few fibers are visible on the surface of the Japanese paper. Therefore, conventional Japanese paper has poor fiber feeling and color mixing feeling. Moreover, although the thing which gave the color change by printing and the thing which has a pearl feeling are obtained, there exists a high possibility of reducing the fiber feeling and color mixing feeling of Japanese paper.

Furthermore, in the technique disclosed in Patent Document 1, a Japanese paper with a bulkiness, a volume feeling, and a presence of additional materials is proposed in which flowers, stems, and leaves are added to bast fibers and only one layer is combined. ing. However, the above-described Japanese paper does not have sufficient depth of fiber and color mixing, and does not have pearly luster.

JP-A-11-323784

The present invention has been made to solve the above-described problems, and the object of the present invention is to combine a design layer made of a fiber having a specific shape and a pearl pigment on the base layer to thereby form a base layer. The purpose is to provide a new high-grade Japanese paper with a deep pearly luster that improves the depth of the fiber and color mixing, and the color and gloss of the fiber and pearl pigment are mixed.

The high-grade Japanese paper of the present invention that achieves the above object is a Japanese paper made by combining a base layer made of pulp and natural raw fiber and / or a design layer made of chemical fiber and pearl pigment, Alternatively, the length of the chemical fiber is 1 to 300 mm, and the basis weight of the pearl pigment is 5 to 100 g / m ² .

The basis weight of the natural raw fiber fiber or chemical fiber fiber is 5 g / m ² or more.

Further, the natural raw fiber is at least one of abaca, banana, and pepper.

An interior finishing material using the high-grade Japanese paper according to any one of claims 1 to 3.

According to the present invention, it is possible to obtain a high-quality Japanese paper having a deep sense of fiber, color mixing and pearly luster without depending on printing. In addition, if you select the type and size of the fibers and pearl pigments in the design layer, you can obtain modern and gorgeous Japanese paper with a very high-class feel.
Furthermore, the high-grade Japanese paper of the present invention is particularly suitable for uses such as interior finishing materials such as wallpaper, interior goods, and packaging, and can provide high-quality Japanese paper with a novel design capable of producing effects not found in conventional Japanese paper.

The high-grade Japanese paper of the present invention is characterized in that a design layer made of a fiber having a specific shape and a pearl pigment is combined on a base layer.

As the raw material of the base layer of the present invention, bast fibers of non-wood plants or wood pulp beaten using a beater such as a beater can be used, and papermaking is performed by a conventional hand milling method or mechanical milling method. be able to. These pulps are preferably colored with a dye or the like before paper making to enhance the color mixing feeling with the fibers and pearls of the design layer.

The length of the natural raw fiber or chemical fiber used in the present invention needs to be in the range of 1 to 300 mm, and more preferably in the range of 3 to 100 mm. If the length is less than 1 mm, the fiber feeling becomes extremely poor and lacks in a high-class feeling, and if the length exceeds 300 mm, it cannot be uniformly spread.
Further, the design of the high-grade Japanese paper of the present invention is influenced by the diameter of the natural raw fiber or chemical fiber, and contains 50% or more of fibers having a diameter in the range of 20 to 500 μm as the natural raw fiber or chemical fiber. It is preferable to contain 50% or more of fibers having a diameter in the range of 50 to 300 μm. By including 50% or more of fibers having a diameter in the range of 20 to 500 μm as natural raw fiber fibers or chemical fibers, the fiber feeling is improved, and the pulp of the base layer and the fibers of the design layer The entanglement between each other is improved, and the strength as Japanese paper can be increased.
Here, the diameter of the natural raw fiber was measured using a microscope. In the present invention, all fiber diameters were measured by this method.

Natural raw grass fibers can be adjusted in diameter by immersing them in an alkaline aqueous solution such as caustic soda and treating them under arbitrary conditions, or by disaggregating them using a disaggregator such as a beater or a mixer. By performing such a disaggregation treatment, the fibers are fibrillated, and the entanglement between the fibers of the base layer pulp and the design layer can be strengthened.
The disaggregation here means that the fiber is broken to a specific diameter. The beating means that the fiber is disaggregated and pulped.

The basis weight of the pearl pigment used in the present invention needs to be in 5 to 100 g / ^{m 2,} is preferably 10 to 50 g / ^{m 2.} When the basis weight is less than 5 g / m ² , the pearly luster is lost, and when it exceeds 100 g / m ² , the fibers of the base layer and the design layer are covered with the pearl pigment, so that it is impossible to maintain the color mixture. .
As the weight of fibers such as natural raw grass fibers and chemical fibers, the measured values after drying the fibers at 105 ° C. for 3 hours and allowing to cool were used.

The average particle size of the pearl pigment is preferably in the range of 10 to 200 μm. By setting the average particle size of the pearl pigment to 10 μm or more, it becomes difficult for the pearl pigment to be buried in the pulp of the base layer, and a good pearl luster can be obtained with a small addition amount. By setting the system to 200 μm or less, it becomes possible to express a deep pearly luster in which the color changes depending on the angle of light.

As this pearl pigment, mica or mica coated with a metal oxide such as titanium oxide can be used, and it is preferable to select a pigment that matches the fibers of the base layer and the design layer.
In addition to the pearl pigment, a metallic pigment made of aluminum, iron, copper, chromium, nickel, gold, or the like can be used. The metallic pigment may be mixed with the pearl pigment or used alone, and the particle size is preferably in the same range as the pearl pigment.

The basis weight of the natural raw fiber or chemical fiber used in the present invention is preferably 5 g / m ² or more from the viewpoint of expressing a fiber feeling and a deep color mixing feeling.
As for the joining with the base layer, it can be carried out by a conventional hand-making method or a machine-making method.

The natural raw fiber used in the present invention is a fiber collected from stems, leaves, leaf sheaths, and examples of plants used include abaca, banana, pepper, kenaf, jute, sisal, rice straw, bamboo, kouzo, ganpi, pineapple, etc. However, the present invention is not limited to these, and various types can be used. In addition, when fibers are collected from plants belonging to the family Gabionaceae such as abaca, banana, and pepper, the texture of the fibers when they are combined dynamically appears, and the glossiness changes depending on the angle of light. Since it is obtained, it is preferable.

The chemical fibers used in the present invention include rayon, polyolefin, nylon, vinylon, polyester, acrylic, polyurethane, and the like, but not limited to these, various types can be used.

The high-grade Japanese paper of the present invention may be laminated with a synthetic resin film, coated or impregnated with a polymer emulsion, coated with a water repellent or water resistant agent, or internally added to improve water resistance, surface strength, and contamination. it can. In addition, a deodorizer, a deodorizer, an antibacterial agent, a negative ion release agent, a flame retardant, a conductive material, an electromagnetic shielding material, or the like can be swallowed or applied in order to impart a function.

The high-grade Japanese paper of the present invention can be directly attached to a wall surface, ceiling, or the like with a commonly used adhesive to form an interior finishing material. In addition, as described above, it is possible to improve water resistance, surface strength, and contamination as an interior finishing material by laminating high-grade Japanese paper with a synthetic resin film and applying or impregnating a polymer emulsion. Alternatively, if a transparent synthetic resin protective layer is provided on the surface of high-grade Japanese paper and a backing material is laminated on the back surface, it can be used as a flooring finishing material.

In addition to interior finishing materials such as wallpaper, interior goods such as wallpaper, packaging, picture letters, lighting fixtures in general, packages, uprights, bran, luncheon mats, coasters, curtains, tapestry, There are graphics, paper dolls, calendars, book covers, bookmarks, and so on. Especially when used as an interior finishing material, the fiber feel, color mixture and pearl luster change slightly depending on the angle of light, and the appearance changes depending on the day and night and the type of lighting. No directing is possible.

EXAMPLES Next, although an Example demonstrates this invention in detail, this invention is not limited to these Examples.

<Example 1>
The kenaf raw fiber is cut to 10 mm, immersed in an aqueous solution containing 10 parts by weight of caustic soda per 100 parts by weight of kenaf raw fiber, washed with water, bleached with sodium hypochlorite, Obtained a kenaf fiber of 50 to 100 μm. To this 1% aqueous solution of kenaf fiber, a pearl pigment having an average particle diameter of 70 μm and having a silver color was added so that the basis weight was 20 g / m ² to prepare a kenaf fiber solution used for the design layer.
The base layer is made from a solution of softwood pulp dyed with a purple direct dye, and the kenaf fiber solution is mixed with the base layer by a hand method so that the basis weight is 30 g / m ² , Dry to obtain high grade Japanese paper. Table 1 shows the evaluation results.

<Examples 2 and 3>
The banana raw fiber was cut into 10 mm, immersed in an aqueous solution containing 7 parts by weight of caustic soda with respect to 100 parts by weight of the banana raw fiber, heated at 100 ° C. for 1 hour, washed with water, and disaggregated with a mixer for 10 seconds. . Next, the mixture was bleached with sodium hypochlorite to obtain banana fibers having a diameter of 50 to 150 μm. To this 1% aqueous solution of banana fiber, a pearl pigment having an orange color with an average particle size of 53 μm was added so that the basis weight was 30 g / m ² to prepare a banana fiber solution used for the design layer.
The base layer is prepared from a softwood pulp solution dyed with a brown direct dye, and the banana fiber solution has a basis weight of 4 g / m ² (Example 2) and 30 g / m ² (Example 3). In this way, the base layer and the hand-rolling method were combined and dried with a press plate at 130 ° C. to obtain a high-quality Japanese paper. Table 1 shows the evaluation results.

<Comparative example>
As a comparative example, Japanese paper was produced in the same manner as in the example under the conditions shown in Table 2. Table 2 shows the evaluation results.

<Evaluation method and evaluation criteria>
Below, the evaluation method and evaluation criteria of the Japanese paper obtained by the Example and the comparative example are shown.
(Fiber feeling) The surface of the design layer was observed from various angles, and the appearance of the fibers was compared with conventional Japanese paper.
A: The fiber feeling is strongly expressed, and the fiber shines depending on the angle, so that it has a very high-class feeling. O: The fiber feeling is strongly expressed and has a high-class feeling.
Δ: Equivalent to conventional Japanese paper.
X: Fibers are hardly visible.
(Pearl luster) The surface of the design layer was observed from various angles, and the glossiness of the pearl pigment was observed.
○: Strong gloss and very high-quality △: Glossy and high-quality ×: Poor gloss (color mixing) The surface of the design layer was observed, and the depth and stereoscopic effect of the design were observed .
○: The fibers of the design layer, the pearl pigment, and the color of the base layer are deeply mixed and have a very high-class feeling. Δ: The colors of the fiber, pearl pigment, and base layer of the design layer are deeply mixed and have a high-class feeling.
×: Color is monotonous and lacks depth

From the results of Table 1, it can be seen that Examples 1, 2 and 3 have good fiber feeling, pearly feeling and color mixing feeling, and the high-quality Japanese paper of the present invention is excellent.
Further, Comparative Example 1 was poor in fiber feeling. Moreover, it turned out that the comparative example 2 has a poor pearl feeling, and the comparative example 3 has a poor color mixing feeling.

According to the present invention, it is possible to obtain a high-quality Japanese paper having a deep sense of fiber, color mixing and pearly luster without relying on printing, and its uses include interior finishing materials such as wallpaper, interior goods, packaging, postcards, lighting decorations, packaging, , Bran, placemat, coaster, curtain, tapestry, graphic, calendar, book cover, bookmark. In particular, when used as an interior finish, the deep fiber feel, color mixing, and pearl luster change slightly depending on the angle of light, and the appearance changes depending on the day and night and the type of lighting. Is possible.

It is a surface view of high-grade Japanese paper of the present invention. It is a surface view of the conventional Japanese paper.

Claims (4)

A Japanese paper made by combining a base layer made of pulp and a natural raw fiber and / or a design layer made of chemical fiber and a pearl pigment, and the length of the natural raw fiber or chemical fiber is 1 to 300 mm A high-grade Japanese paper, wherein the basis weight of the pearl pigment is 5 to 100 g / m ² . The high-grade Japanese paper according to claim 1, wherein a basis weight of the natural raw grass fiber or chemical fiber is 5 g / m ² or more. The high-quality Japanese paper according to claim 1 or 2, wherein the natural raw fiber is at least one of abaca, banana, and pepper. An interior finishing material using the high-grade Japanese paper according to any one of claims 1 to 3.

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