JP2620166B2 - Manufacturing method of shaped pattern paper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a patterned paper on which a lace pattern is transferred by pressing a wet paper.

[0002]

2. Description of the Related Art The technique of forming an uneven shaping pattern on paper includes a dry embossing method in which the paper is once formed and then pressed between rolls on which the pattern is engraved, or the paper is dried on a paper machine. Before the pattern is formed. As is well known, the latter method is a water mark method of shaping with a wet part of a round paper machine or a dandy roll of a fourdrinier paper machine, a press mark method of shaping with a press part, and a wet method of shaping after a press part. The embossing method is typical.

[0003] As is well known, the press part of a paper machine is installed in one or more stages after a wire part.
The felt is circulated between the top roll and the bottom roll via the felt roll. The main functions of the felt used here are to help transport the wet paper, act as a porous medium for efficient dewatering, and to cushion the wet paper without crushing or marking. Work as materials. By the action of the felt, the wet paper web formed by the wire part is subjected to dehydration, surface improvement, densification, and the like, and is transferred to the next dry part.

[0004] In the conventional shaped pattern paper by the press mark method, a wet nip formed by a wet part or a wire part is held and transported on a felt by a roll nip pressure of a press roll or a suction roll.
This is a transfer of the texture pattern of felt to wet paper. Therefore, for the purpose of press marking, it is necessary to manufacture a special felt in which the texture pattern of the felt is strongly exposed on the surface, which is a special example of how to use the felt.

[0005] In order to manufacture paper having a special pattern by the press mark method, it is necessary to specially design and manufacture a felt having a target pattern. There are always disadvantages that must be paid for. Further, when a different type of pattern paper is manufactured, the felt must be replaced each time, and the replacement operation requires a lot of time, so that it is not suitable for small lot production.

[0006]

As the embossing roll used in the wet embossing method, an engraved metal roll or a patterned rubber roll is usually used, and has a feature that a clearer pattern can be expressed by the press mark method. However, there was a defect lacking in delicacy. Another disadvantage is that the production of the roll requires a lot of time and money. In the case of producing a different type of patterned paper, the rolls must be replaced each time, and the replacement operation requires a lot of time, which is not suitable for the production of small lots. An object of the present invention is to solve the disadvantages of the conventional press mark method and wet embossing method. That is,
It is a proposal relating to a method for producing a shaped pattern paper expressing a delicate pattern that could not be produced by these conventional methods.

[0007]

SUMMARY OF THE INVENTION The present inventors have noticed that laces widely used in curtains and the like have complicated and diverse patterns, are simple to manufacture, and relatively inexpensive. A method of manufacturing a transparent paper using this is filed as Japanese Patent Application No. 1-324765. As a result of further studies, the present inventors have found that it is possible to produce delicate and expressive patterned paper using this lace by the press mark method and the wet embossing method, and have completed the present invention. Things. That is, the present invention relates to a shaped pattern paper in which a lace pattern is pressure-transferred to wet paper and a method for producing the same. The gist of the manufacturing method is that, in a press part of a paper machine composed of a top roll, a bottom roll, and a felt passing between the felt and the top roll, a wet paper web is attached by a felt and / or a top roll. To produce a patterned paper to transfer the lace pattern, and, after the press part of the paper machine, press the wet paper between the rolls attached so as to rotate the lace integrally, An object of the present invention is to produce a shaped pattern paper for transferring a lace pattern.

[0008] In the present invention, the wet paper is used alone or as a mixture of chemical pulp such as kraft pulp and sulfite pulp, mechanical pulp, semi-chemical pulp, waste paper pulp, synthetic pulp, synthetic fiber, bast fiber and the like. Strength enhancer, wet paper strength enhancer, sizing agent, fixing agent, retention improver, drainage improver, defoamer, dye, coloring pigment, fluorescent agent, etc. are added as required, and usually freeness 550-350 mlC .
S. F. By using a well-known paper machine such as a fourdrinier paper machine or a circular net paper machine. The pattern of the wet paper thus obtained is transferred by a lace with a press roll in the next press part or after the press part.

In the press part method, when the pattern is transferred in the first-stage press part, and when the transfer is performed in the second and subsequent press parts, the moisture content of the wet paper is different, so the pattern is transferred. The state is different. In the case of pressing in the first stage containing a large amount of water (usually 80 to 85%), a clear pattern is easily transferred because the fibers are easily moved in the paper layer. The pattern becomes unclear as it moves to a later stage, but it is only necessary to appropriately determine at what stage the pressing should be performed depending on the required pattern level. According to the results of the study by the present inventors, a pattern having a water content of about 60% and a medium definition was obtained. In the present invention, in the case of a multi-stage press, a lace pattern can be transferred by a plurality of press parts. In this case, the lace pattern may be changed in each stage.

When the wet paper is pressed between the rolls attached so as to rotate the lace integrally after the press part to produce a shaped pattern paper, this pressing may be performed immediately after the press part. Alternatively, the pressure may be applied by slightly drying with a cylinder dryer or the like.

The lace used in the present invention is a generic name of products in which yarns are formed in a certain structure and the gaps are dense and dense to express a perforated pattern. The lace is embroidered on a base cloth such as a cloth or netting. Includes races with In the present invention, the material of the yarn for producing the lace is not particularly limited, and any of bronze, metal fibers such as stainless steel, synthetic fibers such as nylon and polyester, and natural fibers such as cotton, hemp, and wool are used. Can be used. The lace can be manufactured using a known manufacturing method. Typical methods include embroidery (perforating a cloth stretched over a frame, sewing with a front and back thread, and creating an open lace), and chemical (animal fiber or water-soluble). After embroidering with a thread on a basic cloth knitted with synthetic fibers, only the basic cloth is dissolved and removed with a chemical solution, leaving only the thread part), and a knitting method (knitting with a knitting machine such as a Raschel knitting machine), etc. In the present invention, any of these can be used.

The imprinted paper of the present invention is based on the variety of the lace structure, such as the combination of the thicknesses of the lace yarns, the density of the gaps between the yarns, and the variety of the thickness of the pattern formed by the size of the yarn overlap. Therefore, it is possible to obtain a complicated and delicate pattern and a pattern paper having rich gradations, which are difficult to obtain with the conventional technology. Furthermore, the gradation can be further enhanced by painting a part of the lace mesh with a resin by screen printing or printing, or by embossing the resin. In addition, the lace of the present invention is a digital information of the design by an electronic scanner device and the like, so that it can be manufactured on an automatic weaving machine,
There is an advantage that a complex design can be manufactured in a short time.

An example of a method of rotating a race integrally with a felt or a press roll in the press part method will be described with reference to the drawings. As shown in FIG. 1, the lace 4 is sewn on the surface of the felt 3 and is rotated integrally. In this manner, the lace 4 may be glued to the felt 3 using an adhesive, and in some cases may be rotated in tune with the felt without sewn or glued. As another example, as shown in FIG. 2, a method in which a race 4 is passed around a top roll 1 and a touch roll 6 in a belt shape and rotated. In this method, in order to improve the durability of the race, the race may be integrally rotated via a backing material such as a rubber-impregnated woven fabric or a rubber annular belt. Another example is a method in which a race 4 is attached to the outer peripheral surface of the top roll 1 and rotated as shown in FIG. At this time, the lace is attached to the roll by a method of sewing or bonding, or a method of attaching a cylindrical lace made of a heat-shrinkable fiber by a shrink method. At this time, similarly to the above, the race may be integrally rotated via a backing material such as a rubber-impregnated woven fabric or a rubber annular belt. In the present invention, these combinations are appropriately performed. That is, by rotating the lace with both the top roll and the felt, the lace pattern can be transferred to both surfaces of the wet paper, and the design effect can be further enhanced.

An example of a method of rotating a lace and a roll integrally in a method of manufacturing a pattern paper in which a wet paper is pressed between rolls attached so as to rotate a lace integrally after a press part is described below. Will be described. As shown in FIG. 4, this is a method of attaching a race to a metal or rubber top roll and rotating it. At this time, the lace is attached to the roll by a method of sewing or bonding, or a method of attaching a cylindrical lace made of a heat-shrinkable fiber by a shrink method. At this time, the lace may be integrally rotated through a backing material such as a rubber-impregnated woven fabric or a rubber annular belt. As shown in FIG. 5, this is a method in which a race is passed around a top roll and a touch roll in a belt shape and rotated. In this method, the race may be integrally rotated through a backing material such as a rubber-impregnated woven fabric or a rubber annular belt.

According to the present invention, the lace pattern is transferred to wet paper by the method described above, dried and wound up in a dry part such as a multi-cylinder cylinder dryer according to a conventional method. Hereinafter, the present invention will be described in detail based on examples.

[0016]

【Example】

Example. 1. In the press part of Fourdrinier paper machine, a lace of a floral pattern woven with polyester fiber is laid on the felt so as not to loosen, the both ends of the lace are sewn to the felt, and the top roll and the bottom roll are turned together. I can move.
Then, using the stock of the following composition, the basis weight is 100 g / m
² (converted to dry weight; the same applies hereinafter), and a wet paper web is formed.
After pressing at 20 kg / cm, it was dried with a multi-cylinder cylinder drier to produce a pattern paper. As a result, a shaped pattern paper with rich gradations in which a delicate and complicated floral pattern was embossed was obtained.

Embodiment 1 2 The same race as in Example 1 was impregnated with a water-dispersible urethane resin (trade name "VONDIC1670N", manufactured by Dainippon Ink and Chemicals, Inc.) to which a crosslinking agent and a catalyst were added, and the race strength and texture were stabilized. A belt-like lace was produced with improved properties. Using this, it was attached to the top roll of the press part of the round paper machine so as to be able to rotate via a touch roll. Then, using the same stock as in Example 1,
A wet paper of 00 g / m ² was formed, pressed at a press linear pressure of 90 kg / cm between both rolls at a moisture of 62%, and then dried with a multi-cylinder cylinder dryer to produce a patterned paper. As a result, a shaped pattern paper with rich gradations in which a delicate and complicated floral pattern was embossed was obtained.

Embodiment 1 3 On the top roll of the press part of the fourdrinier paper machine, apply a lace of a cage woven with polyester filament to an epoxy resin (trade name “Araldite 106” CIBA-GE).
(Manufactured by IGY)). The felt was sewn in the same way as in Example 1 with the same lacquer-like lace. Next, a wet paper having a basis weight of 100 g / m ² was formed under the same press conditions using the same stock as in Example 1.
By embossing from both sides of the wet paper, a shaped pattern paper having a laid pattern on both sides was obtained.

Embodiment 1 4. After the press part of the Fourdrinier paper machine, a lace treated in the same manner as in Example 2 was passed through a top roll in the form of a belt and swirled through a paper roll. Wet paper with a basis weight of 110 g / m ² (water content 55
%) Was passed between rolls and pressed at a linear pressure of 120 kg / cm, and then dried with a multi-cylinder cylinder dryer to produce a patterned paper. As a result, a shaped pattern paper with rich gradations in which a delicate and complicated floral pattern was embossed was obtained.

As described above, the shaped pattern paper of the present invention can be manufactured and has the following advantages. It has become possible to produce imprinted patterned paper having various and complicated patterns that could not be achieved by the conventional press mark method and wet embossing method. The pattern can be changed by changing the race, but the frame can be changed in a much shorter time than the conventional method. Production of small lots became possible. Inexpensive machine-woven laces can be used, so that the economic effect is great.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of an apparatus for transferring a lace pattern to wet paper by a press mark method.

FIG. 2 is a side view showing another example of an apparatus for transferring a lace pattern to wet paper by a press mark method.

FIG. 3 is a side view showing another example of an apparatus for transferring a lace pattern to wet paper by a press mark method.

FIG. 4 is a side view showing an example of an apparatus for transferring a lace pattern to wet paper by a wet embossing method.

FIG. 5 is a side view showing another example of an apparatus for transferring a lace pattern to wet paper by a wet embossing method.

[Explanation of symbols]

 1 Top roll 2 Bottom roll 3 Felt 4 Lace 5 Wet paper 6 Touch roll

 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-57-25497 (JP, A) JP-A-49-109613 (JP, A) JP-A-3-185200 (JP, A)

Claims (2)

(57) [Claims] In a press part of a paper machine comprising a top roll, a bottom roll, and a felt passing therebetween, the wet paper is pressed by a felt and / or a top roll attached so as to rotate the lace integrally. A method for producing a shaped pattern paper, comprising transferring a lace pattern. 2. A patterning paper, wherein a wet paper is pressed between rolls attached so as to rotate the lace integrally after a press part of the paper machine, and a pattern of the lace is transferred. Production method.