JP2001020197A - Pearl-toned glossy paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide pearl-toned glossy paper especially suitably used e.g. for flower wrapping and wrapping paper for gifts. SOLUTION: This glossy paper is made of a blend paper stock contain >=30 wt.% fiber having a flat section, a flatness of 3 to 20, a single fiber fineness of 0.01 to 2.0 deniers, a single fiber length of 0.5 to 20 mm, and has a glossiness of >=10 glosses. The fiber having the flat section is produced by splitting a multilayer lamination-type splittable conjugate fiber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pearly glossy paper,
Particularly, the present invention relates to a glossy paper suitably used for flower wrapping, gift wrapping paper and the like.

[0002]

2. Description of the Related Art Conventionally, paper using natural fibers such as pulp and hemp, or paper obtained by mixing recycled fibers and synthetic fibers with natural fibers has been used as a wrapping paper for flower wrapping and gifts. . However, these papers have poor glossiness, and in order to compensate for this, post-processing methods such as laminating a synthetic plastic film to these papers or coating with resin are used. However, the number of steps increases and the process becomes complicated, which leads to an increase in cost and is not preferable.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to suppress the increase in the number of steps, which is a problem in the above-mentioned prior art, to reduce the cost, and to obtain a glossy paper having an unprecedented pearly gloss. It is obtained by a simple method.

[0004]

Means for Solving the Problems The present inventors have conducted intensive studies to achieve the above-mentioned object, and as a result, by using a specific flat cross section fiber, a pearly glossy paper having a glossiness of 10 gloss or more can be obtained. It has been found that it can be obtained.

In the present invention, the aspect ratio is 3 or more and 20 or less, the single fiber fineness is 0.01 d or more and 2.0 d or less, and the fiber length is 0.3 or less.
A pearlescent glossy paper characterized by having a gloss of 10 gloss or more by blending a flat cross section fiber of 5 mm or more and 20 mm or less with 30 wt% or more, preferably, a split composite fiber having a multilayer cross section of flat cross section fiber. This is a pearly glossy paper which is a fiber obtained by splitting the paper.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The pearly glossy paper of the present invention has a flat section having a flatness ratio of 3 or more and 20 or less, a single fiber fineness of 0.01 d or more and 2.0 d or less, and a fiber length of 0.5 mm or more and 20 mm or less. It is obtained by blending fibers in an amount of 30 wt% or more.
For example, a fiber-forming polymer such as polyester, polyamide, polyolefin, and polyacrylonitrile may be used.

A fiber having an aspect ratio of 3 or more and 20 or less can be obtained, for example, by melt-spinning a thermoplastic polymer represented by polyester, polyamide, or polyolefin to obtain a cross-sectional fiber having an intended aspect ratio. For this purpose, a method in which a polymer is spun alone from a slit-shaped die is conceivable.However, in this method, there is a limit in reducing the single-fiber fineness, and particularly in order to obtain a flat cross-sectional fiber of 0.5 d or less. Is preferably a method based on composite spinning. The method of composite spinning refers to a method of spinning two or more kinds of polymers from a composite spinneret, for example, a method obtained by using a radial split die (FIG. 1) or a multilayer alternately laminated die. (FIG. 2). The conjugate fiber obtained by using these methods has an intended flatness ratio by dividing at the lamination surface at the time of drawing, cutting, and / or at the time of fiber dispersion in the paper making process. And a single fiber fineness of not more than 2.0 d,
5d or less can be achieved. Incidentally, the polymer in the flat cross-section fiber used in the present invention, an antioxidant,
Even if a matting agent, an antistatic agent, a deodorant, a fragrance, a flame retardant, and a yarn-making process passability improver, etc. are added, there is no problem, but the amount of these additives is limited to the gloss of glossy paper.
In addition, the content is preferably in a range that does not adversely affect the performance as wrapping paper. In particular, it is preferable not to add a matting agent. In the fiber production method of the present invention, the two types of thermoplastic polymers described above are each melt-extruded by an individual extruder, introduced into a spinning head, and passed through a spinneret for forming a desired individual composite shape. Then, a production method of melt spinning, stretching, and cutting may be used.

The fineness and the fiber length are preferably in the range of 0.01 d to 2.0 d, and the fiber length is in the range of 0.5 to 20 mm because the wet papermaking method is used.
More preferably, the fiber length is in the range of 1 to 1.5 d and the fiber length is in the range of 1 to 10 mm, and more preferably, the aspect ratio {fiber length / fiber diameter (circumscribed circle diameter of single fiber cross section)} is 1000 or less. When the aspect ratio exceeds 1000, poor dispersion of fibers is caused during papermaking, and the strength of the paper is remarkably reduced. In addition, spotting and poor formation are caused, so that it is a high-grade material for flower wrapping or gift wrapping paper. It is not desirable because there is no feeling. If it is less than 0.01 d, stable fibers will not be obtained, and it will be difficult to obtain the target flatness ratio described below, so that it cannot be used.

As for the aspect ratio, the major axis length of the fiber cross section /
Calculated by the short axis length, it must be in the range of 3 or more and 20 or less. Preferably, the aspect ratio is 4 or more and 13 or less. When the aspect ratio is less than 3, glossy paper is undesirably lost due to irregular reflection on the surface of each single fiber when glossy paper is used. When the aspect ratio is more than 20, it is very difficult to maintain the target cross-sectional fiber in the fiber production stage, and even if it can be maintained, it is fibrillated at the time of stretching, at the time of cutting, and at the time of dispersion in the papermaking process, and This is not preferable because it tends to cause poor dispersion.

The glossy paper of the present invention can be easily obtained by making a paper using a wet paper machine. Examples of the paper net used include circular nets, short nets, and long nets, and these paper nets can be used alone to form a single-layer glossy paper. The paper may be a glossy paper. Next, examples of the dryer include a Yankee type and a cylindrical type. Also, after paper making, if necessary, hot press processing, even if subjected to processing such as heat embossing, as long as it does not affect the glossiness,
No problem. In order to obtain the glossy paper of the present invention, the above-mentioned flat cross section fiber in the above-mentioned papermaking process is 30 wt%.
It is necessary that they are mixed. In the papermaking process,
Most of the flat cross-section fibers are paper-formed so that the smooth surface faces upward, and the desired glossiness can be obtained by reflection on the smooth surface. Preferably, the blending rate is 40% by weight or more, and more preferably, the blending rate is 50% by weight or more. If the blending ratio of the flat cross-section fiber is less than 30 wt%, glossy paper having the desired glossiness cannot be obtained, which is not preferable. Other fibers to be mixed include natural fibers such as pulp and hemp, regenerated fibers such as rayon, and synthetic fibers such as vinylon, polyester, polyolefin, and polyamide.The fineness and fiber length of these fibers are determined during papermaking. Is good if the dispersibility of the fiber is good, and the formation is good.
One or two or more of them may be mixed.

The basis weight of the glossy paper in the present invention is preferably from 5 g / m ^{2 to} 100 g / m ² , more preferably from 10 g / m ^{2 to} 60 g / m ² .

In view of the strength of the glossy paper, it is preferable to blend about 3 wt% or more and about 30 wt% or less of binder fibers. The binder fiber is not particularly limited as long as it softens under dry conditions and fixes the fibers, and examples thereof include vinylon-based binder fibers, ester-based binder fibers, and urethane-based binder fibers. Further, a latex polymer such as vinyl chloride or vinylidene chloride having the same function may be used.
If the amount of the binder is less than 3 wt%, the strength as paper is poor, which is not preferable. The amount of the binder only needs to be an amount that can maintain the strength as flower wrapping paper or gift wrapping paper. That is, it is not necessary to use a large amount exceeding 30 wt%. Further, depending on the type of the binder, when used in a large amount, a sticky feeling may be generated and the paper may become unsuitable as paper.

The pearly glossy paper of the present invention is ERICHS
The glossiness measured by EN company (Germany) 60 ゜ glossmeter is 1
It has 0 gloss or more and is suitable for flower wrapping or gift wrapping paper. Preferably, the glossiness is 12 gloss or more. Paper having a glossiness of less than 10 gloss is not preferable because it lacks glossiness and lacks high-grade feeling as glossy paper for flower wrapping or gift wrapping paper.

[0014]

EXAMPLES The present invention will be described below with reference to more specific examples, but the present invention is by no means limited to these examples.

Example 1 Reduced viscosity 0.85 (concentration of 1 g in orthochlorophenol)
/ Dl, 30 ° C) and reduced viscosity 1.80 (concentration in orthochlorophenol 1 g / d)
1, 30 ° C.) and melt extruded individually, and then each polymer part is formed into a multi-layer composite shape having 6 layers of polyethylene terephthalate and 5 layers of nylon 6 as shown in FIG. The mixture was supplied to a spinning head to be molded, melt-spun at a melt spinning temperature of 285 ° C., stretched and cut by a conventional method to obtain a splittable conjugate fiber having a fineness of 3.3 d and a fiber length of 3 mm. 90 w of the obtained splittable conjugate fiber
t%, vinylon-based binder fiber (1 d × 3 mm, “VPB105-2 × 3” manufactured by Kuraray Co., Ltd.) at a ratio of 10 wt% into a pulper, mixed using a short net type wet paper machine, and then mixed with a Yankee Drying was performed with a dryer to obtain glossy paper. At this time, the single-fiber fineness of the flat cross-section fiber was 0.3 d, the flatness ratio was 8.75, and the glossiness of the obtained glossy paper was 16.8 gloss, which was a glossy paper having a pearly glossiness. .

Examples 2 to 4 The splittable conjugate fiber of Example 1 was mixed with unbeaten pulp in the same manner as in Example 1 in the ratio shown in Table 1, and dried to obtain glossy paper. As shown in Table 1, the glossiness of the obtained glossy papers was glossy paper having a pearly glossiness.

[0017]

[Table 1]

Examples 5 to 7 By using the splittable conjugate fiber of Example 1 and performing the same operation as in Example 1, at the ratio shown in Table 1, polyester fiber (having a fineness of 0.1%) was used.
4d, fiber length 3 mm, addition of TiO ₂ 0.4%, round cross-section fiber) and vinylon-based binder fiber were mixed, and a glossy paper was obtained in the same manner as in Example 1. The glossiness of the glossy paper thus obtained was as shown in Table 1, and the glossy paper had a pearly glossiness.

Comparative Example 1 A paper was prepared and dried in the same manner as in Example 1 with a 100% unbeaten pulp composition. The glossiness of the obtained paper was 4.3 gloss, which was a paper having no glossiness.

Comparative Examples 2 and 3 The splittable conjugate fiber of Example 1 was mixed with unbeaten pulp in the same manner as in Example 1 in the ratio shown in Table 1, and dried to obtain a sample paper. The glossiness of the obtained paper was as shown in Table 1, and the paper was poor in glossiness.

Comparative Example 4 Polyester fiber (fineness = 0.4 d, fiber length = 3 mm,
TiO ₂ 0.4%, round cross-section fiber) and the vinylon-based binder fiber of Example 1 with the composition shown in Table 1
The mixture was mixed and dried in the same manner as described above to obtain a sample paper. The glossiness of the obtained paper was as shown in Table 1, and the paper was poor in glossiness.

Comparative Examples 5 to 6 The splittable conjugate fiber and polyester fiber of Example 1 (fineness =
0.4d, fiber length = 3 mm, TiO ₂ is 0.4%, and a vinylon binder fibers of round cross-section fibers) and Example 1 in the compositions shown in Table 1, and混抄in the same manner as in Example 1 And dried to obtain a sample paper. The glossiness of the obtained paper was as shown in Table 1, and the paper was poor in glossiness.

Comparative Example 7 Vinylon fiber (fineness = 0.3 d, fiber length = 3 mm, Ti
O ₂ 0.4%, round cross-section fiber) and vinylon-based binder fiber were mixed with the composition shown in Table 1 in the same manner as in Example 1 and dried to obtain a sample paper. The glossiness of the obtained paper was a paper lacking in glossiness as shown in Table 1.

Comparative Example 8 Acrylic fiber (fineness = 0.1 d, fiber length = 3 mm, round section fiber) and vinylon-based binder fiber were mixed in the same manner as in Example 1 with the composition shown in Table 1, It was dried to obtain a sample paper. The glossiness of the obtained paper was a paper lacking in glossiness as shown in Table 1.

[0025]

The glossy paper of the present invention is made of fibers having a flat cross section, so that the surface glossiness is extremely excellent. Due to such characteristics, it is suitably used for wrapping paper requiring design properties.

[Brief description of the drawings]

FIG. 1 is a fiber cross-sectional view showing an example of a composite form of a splittable composite fiber of the present invention.

FIG. 2 is a fiber cross-sectional view showing another example of the composite form of the splittable composite fiber of the present invention.

[Explanation of symbols]

 A: One component of splittable fiber B: Another component of splittable fiber

Claims (3)

[Claims] 1. A flat fiber having a flattening ratio of 3 or more and 20 or less, a single fiber fineness of 0.01 d or more and 2.0 d or less, and a fiber length of 0.5 mm or more and 20 mm or less having a flat cross section of 30 wt% or more, is mixed to form 10 gloss. A pearly glossy paper having the above glossiness. 2. The pearly glossy paper according to claim 1, wherein the flat cross-section fiber is a fiber obtained by dividing a multi-layer laminated splittable conjugate fiber. 3. A wrapping material using the glossy paper according to claim 1.