JPH04136300A - Decorative paper and its production - Google Patents

Abstract

PURPOSE:To continuously produce the subject decorative paper having the function of an interior material and the function of a pattern paper in large quantities by combining a pulp paper layer with a paper layer of a rayon staple fiber formed by a single-cylinder machine. CONSTITUTION:Modified cross-section rayon staple fibers having self-adhesivity are dispersed, dyed, beaten, purified and formed in the form of a paper sheet by a single-cylinder machine. At the same time, pulp is dispersed, dyed in a color similar to the fiber, beaten, purified and subjected together with the above fiber to combined paper-making process to obtain the objective decorative paper.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a decorative paper, particularly a decorative paper suitable as an interior material when packaging various products in a packaging box or the like,
It relates to its manufacturing method.

BACKGROUND OF THE INVENTION When packaging products in a fashionable manner, various interior materials are used.

For example, when packaging products such as Western alcoholic beverages one by one or multiple bottles at a time, a paper pattern is placed in the box to secure the product stably, and then the paper interior is lined with cloth, etc. to cover this paper pattern. By packaging the product in this way, it is possible to safely handle the product, and when the package is opened, it looks luxurious. Note that the paper pattern has cutouts or notches that match the external shape of the product, and by assembling it three-dimensionally to match the size of the box, it is possible to prevent the product stored in the cutout from moving. On the other hand, interior materials such as cloth,
Since it is purely for appearance, it is common to use thin woven or non-woven fabric dyed in an appropriate color.

Problems to be Solved by the Invention When using such conventional technology, the interior material such as cloth is a separate member from the paper pattern, so the packaging work is troublesome, and depending on the product, it has been pointed out that there is excessive packaging. There were many problems.

Also, if you want to integrate the pattern and the interior material, you will have to glue them together to create a pattern with the interior material.
The problem of excessive labor required for the bonding work was unavoidable.

Therefore, in view of the problems of the prior art, an object of the present invention is to make paper by combining a paper layer of rayon stable fiber and a paper layer of pulp equivalent to a paper pattern, thereby facilitating the lamination work. To provide a decorative paper capable of realizing both the function of an interior material and the function of a paper pattern without having to do anything, and to provide a method for producing the same.

Means for Solving the Problems The first invention according to this application to achieve the object has a paper layer made of rayon stable fibers made by a short wire paper machine, and a paper layer made of rope paper. Its gist is to combine the two into one.

The configuration of the second invention is to disperse and disintegrate rayon stable fibers with irregular cross sections that have self-adhesive properties, dye, beat and purify them, and make paper using a short wire paper machine, while dispersing and disintegrating pulp, and dispersing and disintegrating rayon tape/l. /The gist is to dye the fiber in a similar color, beat and refine it, and combine it with rayon stable fiber to make paper.

Effect When according to the configuration of the first invention, the paper layer made of rayon stable fiber and the paper layer made of pulp are:
Together, they form a sheet of paper, and the former can be used to create a beautiful interior material due to the luster of the rayon stable fiber, while the latter can be made into a paper with sufficient quality (by making it into a paper pattern). can perform the following functions.

According to the configuration of the second invention, since the rayon stable fiber is made into paper by a short wire paper machine and then combined with paper stock made of pulp, the - side is the paper layer of the rayon stable fiber. It is possible to continuously produce a predetermined decorative paper consisting of a pulp paper layer on the other side. Note that a cylinder or short wire paper machine can be used for both paper-combining steps.

As the rayon stable fiber, one with an irregular cross section that has self-adhesive properties is used, and this may be one that is commercially available for use in wet-laid nonwoven fabrics (for example, Daiwabo Rayon Co., Ltd.'s rayon for nonwoven fabrics "Corona", type S.B.
H, same 5BR).

The fineness of the rayon stable fiber is preferably about 1 to 5 denier, and the fiber length is about 1 to 1011
A thickness of about 11n is preferable, and particularly a thickness of about 3 to 5 mm shows good results. Excessive fiber length will result in poor dispersion during the disintegration process, resulting in an uneven finish and a tendency to cause uneven texture. On the other hand, if the length is too short, entanglement is difficult to occur, resulting in poor papermaking yield, and in the finished state, the presence of fibers will not be recognized, and the difference from ordinary paper will not be noticeable.

Note that the hollow flat cross-section rayon stable fiber is
A particularly good gloss can be achieved during finishing.

1 g of rayon stable fiber can be processed by a pulper, and the solid content concentration at that time is about 5% by weight or less, particularly preferably about 2% by weight, which is lower than that in dispersion and disintegration of pulp. It is preferable.

This is because if the solid content concentration is too high, it is difficult to obtain uniform dispersion.

For dyeing of rayon stable fiber, the solid content concentration should be 3.
It is diluted to less than 1% by weight, particularly preferably less than 1% by weight, and carried out by pouring. The dye may be any of general direct dyes, basic dyes, acidic dyes, and may be cationic dyes. Cationic dyes are salts that have a positively charged dye cation in the coloring part, and include diarylmethane, triallylmethane, thiazole, methine, xanthine, oxazine, thiazine, azine, acridine, and azo dyes. There are dyes such as , azamethine, and anthraquinone.

In addition, various additives can be added at the same time as dyeing, if necessary. For example, dry paper strength enhancers include cationized starch, cationized polyacrylamide, anionized polyacrylamide, carboxy-modified polyvinyl alcohol, gelatin, etc., and sizing agents include fatty acid salts,
Rosin derivatives, dialkyl ketene dimer emulsions, petroleum resin emulsions, ammonium salts of styrene-maleic anhydride copolymer alkyl esters, etc., as wet paper strength enhancers, melamine resins, urea resins, epoxidized polyamide resins, fixing agents, etc. Examples include cationically modified polymers such as cationized starch. The paper strength enhancer is Rayon Stable Phino S? By increasing the bonding strength between the rayon staple fiber itself or the pulp, it is possible to prevent the rayon staple fiber from peeling off during the subsequent drying process or the like.

Beating and purification after dyeing is performed using a refiner.

The rayon staple fiber stock prepared in this way is made into paper using a short wire paper machine, and is made of 100% rayon.
paper layer is obtained. In short wire paper machines, the furnish is further diluted to a solids concentration of 0.05% by weight or less, particularly preferably 0.
．． Paper is made at a concentration of about 0.03 to 0.01% by weight. If the solid content concentration during paper making is high, harmful unevenness in texture tends to occur, but by lowering this concentration sufficiently, the orientation of the fibers in the paper layer becomes random, resulting in a product with no directionality and a rich glossiness. be able to.

As pulp, various natural pulps and synthetic pulps are used.
Although they can be used alone or in combination, pulps with few impurities and high strength are preferred. For example, in terms of strength, softwood kraft pulp is preferred. Furthermore, it is necessary to limit the blending ratio of synthetic pulps and semi-chemical pulps that have poor fixing properties depending on the purpose of use.

The pulp processing process is not particularly different from that in the general paper manufacturing process. That is, after performing dispersion and disintegration using a pulper at a solid content concentration of approximately 7 to 8% by weight, dyeing using a bocher is performed, but at this time, the solid content concentration is approximately 1% by weight.
About 8% by weight, especially about 3 to 4% by weight is suitable.

It is preferable that the pulp be dyed in a similar color to the dyeing of the rayon staple fibers, and the dyeing density should be somewhat higher than that of the rayon staple fibers. Since the rayon staple fiber has high transparency, by doing so, a two-stage refraction effect can be obtained, and a deeper glossiness can be obtained.

A paper layer of rayon staple fibers made by a short wire paper machine is adsorbed to the underside of the felt and then conveyed to, for example, a cylinder paper machine. Therefore, in a cylinder paper machine, paper can be made by adhering a pulp paper layer to the lower surface of the rayon staple fiber paper layer adsorbed to the lower surface of the felt, and combining the two. Note that the paper machine for making the combined paper may be a short wire paper machine in addition to a cylinder paper machine.

After the paper layer of rayon staple fiber and the paper layer of pulp are combined, they are compressed and dehydrated, dried, and then finished using a calender device. At this time, the compression process has a linear pressure of 70
It is best to use a powerful multistage press with a pressure of about 100 kg/an, and if the linear pressure is insufficient, the rayon staple fiber cannot be pressed into a sheet. In addition, in the drying process, it is preferable that the drying temperature on the pulp side is somewhat higher than that on the rayon staple fiber side, and in the calendering process, it is preferable to apply water gloss to the rayon staple fiber side.

This is because the product tends to warp somewhat toward the rayon staple fiber side during the drying process.

The decorative paper produced in this way has a decorative surface of rayon staple fibers formed on the front side, and a patterned paper surface of a predetermined strength on the back side, and both form a complete sheet of paper. present. On the decorative surface, it is recognized that rayon staple fibers are scattered in no direction, and a deep luster is observed, so that it can be extremely suitably used as an interior material for packaging products.

As described in detail, according to the first invention of this application,
By combining a paper layer of rayon staple fiber made with a short wire paper machine and a paper layer of pulp, the former forms a glossy decorative surface, and the latter forms a paper pattern surface, so it can be used for interior decoration. It has the excellent effect of having both the function of wood and the function of paper pattern.

According to the second invention, without complicated pasting work,
There is an effect that the decorative paper according to the first invention can be continuously mass-produced.

EXAMPLE A rayon staple fiber with a fineness of 1.5 denier and a fiber length of 5 tmn was used, which was dispersed and disintegrated at a solid content concentration of 2%, and then diluted to a solid content concentration of 1% or less and dyed.

As the rayon staple fiber, wet-laid nonwoven rayon "Corona", type SBH manufactured by Daiwabo Rayon Co., Ltd. was used.

This material has a hollow flat cross section and has self-adhesive properties due to hydrogen bonding.

After the dyed rayon staple fiber is beaten and purified,
Wet paper was made using a short wire paper machine to give a dry weight of 37 g/rT1'.

The pulp is dispersed and disintegrated at a solid content concentration of 8%, diluted to 4%, dyed in a similar color to that of rayon staple fibers, and after beating and purification, it is made into a paper layer of rayon staple fibers using a cylinder paper machine. I combined them and made paper. Note that the paper layer of pulp had a dry weight of 120 g/d.

After papermaking, the paper was compressed and dehydrated, dried, and then calendered.

The resulting decorative paper has a beautiful decorative surface made of rayon staple fibers formed on one side of the stiff pulp paper layer, and the two are completely integrated to form a single sheet of paper. ing. On the decorative surface, rayon staple fibers directed in an undefined direction can be recognized, and since both the rayon staple fibers and the pulp are dyed in similar colors, the decorative surface as a whole has a deep glossy appearance. It was suitable as an interior material for packaging.

Claims (1)

[Scope of Claims] 1) Decorative paper made by integrally making a paper layer made of rayon staple fibers made by a short wire paper machine and a paper layer made of pulp. 2) Disperse and disintegrate self-adhesive rayon staple fibers with irregular cross-sections, dye them, beat and refine them, and make paper using a short-mesh paper machine, while dispersing and disintegrate the pulp and dye it in a similar color to the rayon staple fibers. A method for producing decorative paper, which comprises beating and refining the rayon staple fiber and making paper by combining it with the rayon staple fiber.