JP2000127268A - Off-machine embossing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a patterned sheet wherein a pattern is deeply formed by one-side embossing in such a manner that the pattern appears as if it were formed by both-side embossing while using a rubber roll having a flat outer periphery with a specific hardness. SOLUTION: The rubber hardness of a rubber roll 12 having a flat outer periphery is set 70 deg.-90 deg. of JIS A. And in an emboss processing, a paper 20 is passed through between an engraved roll 11 and the rubber roll 12 to transfer an irregular pattern onto the paper 20. At that time, at a location where a protrusion of the roll 11 comes into contact with the paper, the paper 20 is pressed toward the roll 12 so that a recess is formed. At that moment, the roll 12 and the paper 20 as well are simultaneously pressed; however, there are differences in the amount of recess between the roll and the paper, and the irregular pattern transferred to the paper 20 is influenced. Since the rubber must have a large elastic recovery, a nitrile rubber or urethane rubber is preferable as the rubber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embossing device for forming an uneven pattern on a sheet-like material,
In particular, it relates to an off-machine embossing device using a rubber roll.

[0002]

2. Description of the Related Art Embossing methods include on-machine wet embossing, on-machine dry embossing, and off-machine dry embossing. The on-machine wet embossing method is a method in which embossing is performed in the state of wet paper at the dryer entrance after the press part of a paper machine to form a pattern on the paper. The on-machine dry embossing method is a method of embossing dry paper between a dryer and a dryer of a paper machine to form a pattern on the paper. The off-machine dry embossing method is a method of dry embossing dry paper separated from a paper machine.

[0003] The off-machine dry embossing method involves embossing a single-sided embossed metal roll using a high-hardness roll (hardness D: 80 ° ± 4 °) as a receiving roll. It can be patterned with engraving rolls and embossed on both sides,
Clearer pattern processing is possible than on-machine wet embossing method and on-machine dry embossing method.

However, in the case of a single-sided emboss using a receiving roll having a high hardness, it is difficult to reproduce a roll pattern depending on a pattern even when a strong pressure is applied. Also, when a double-sided embossing is performed on a receiving roll having high hardness, it takes time to design the receiving roll. Further, in order to make a product of an ordered product by embossing on both sides, a special receiving roll is required, so that there is a problem that the cost is increased.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve these problems. In an off-machine embossing apparatus, a rubber roll is used as a receiving roll, and a single-sided emboss is used as a paper roll. It is an object of the present invention to provide an apparatus for manufacturing a pattern paper by deeply inserting a pattern into a pattern.

[0006]

Means for Solving the Problems The present inventors have made various studies to achieve the above object, and as a result, even if a rubber roll having a flat outer peripheral surface is used in an off-machine dry embossing device, it is relatively thick. It has been found that in embossing paper having texture, good patterning can be achieved depending on the rubber hardness, and the present invention has been accomplished based on this finding.

That is, the present invention relates to an off-machine embossing apparatus for embossing pattern paper in which paper is embossed between an engraving roll and a rubber roll, wherein the rubber roll having a flat outer peripheral surface has a rubber hardness of JIS A 70 ° to 90 °. It is characterized by:

Further, the present invention is characterized in that, in the off-machine embossing device, the rubber of the rubber roll is nitrile rubber or urethane rubber.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is an overall view of the off-machine embossing device. The wound paper 20 is attached to the unwinding device 30, and the paper 2
0 is supplied to the off-machine embossing device 10 on the left side, the embossing is performed by the off-machine embossing device 10, and the processed paper 20 is supplied to the cutting machine 40 on the left side. The embossed paper 20 is cut to a desired length. However, a winding device may be arranged instead of the cutting machine 40.

FIG. 1 shows that a paper 20 is passed between an engraving roll 11 and a rubber roll 12 during embossing.
Is a model representation of a state in which an uneven pattern is transferred to the image. At this time, the paper 20 is in a dry state.

In FIG. 1, a paper 20 is fed from the right side, embossed, and sent to the left side. Where the convex portion of the engraving roll 11 is in contact, the paper 20 is pressed toward the rubber roll 12 to form a dent. At this time, the rubber roll 12 is also pushed at the same time as the paper 20, but the amount to be pushed varies depending on the rubber hardness, and the uneven pattern transferred to the paper 20 is affected.

In the present embodiment, the lasha skin, 4 × 6 size (Y
In (E), embossing was performed using an off-machine embossing apparatus using 1,000 sheets of relatively thick paper 20 weighing 130 kg. During processing, the best linear pressure applied to the engraving roll 11 is 75 kg / cm, and 70 kg / cm.
The range of ８０80 kg / cm was good in terms of patterning.
As the linear pressure increases, the transferred irregularities become deeper,
Deformation and abrasion are increased, and the linear pressure is 60 kg / c.
When it was less than m, the transferred concavo-convex pattern became thin. In addition, since the surface of the rubber roll deforms to conform to the irregularities of the engraving roll, a pattern such as double-sided embossing can be transferred.
The rubber hardness at this time is sh when converted to Shore hardness.
ORE A JIS A7 equivalent to 20 ° to 45 °
Those between 0 ° and 90 ° gave good results. Rubber hardness is 7
When the angle is 0 ° or less, the rubber wears quickly and the strength of the rubber is inferior.

The rubber of the rubber roll 12 has a high abrasion resistance because it comes into direct contact with the paper, and is well adapted to the engraving roll during patterning, and is elastic before returning to a flat state before processing. It must be resilient. For the above reasons, the rubber material is preferably nitrile rubber or urethane rubber having high abrasion resistance and elastic recovery force.

[0015]

As described above, the present invention has the following excellent effects. (1) When performing double-sided embossing, it is not necessary to use a receiving roll for double-sided embossing as in the related art, and it is not necessary to pattern the receiving roll. (2) Even if the engraving roll is the same, the same engraving roll and the receiving roll or rubber roll having high hardness are used by using the fact that the pattern to be embossed is different between the case of using a high hardness roll as the receiving roll and the case of using the rubber roll. By combining any of the above, embossing with different patterns can be performed.

[Brief description of the drawings]

FIG. 1 is a sectional view of an engraving roll and a rubber roll of the present invention.

FIG. 2 is a schematic view of an off-machine embossing device of the present invention.

[Explanation of symbols]

 Reference Signs List 10 off-machine embossing device 11 engraving roll 12 receiving roll (rubber roll) 20 paper 30 unwinding device 40 cutter device

Claims (2)

[Claims] 1. An off-machine embossing apparatus for embossing a patterned paper in which paper is embossed between an engraving roll and a rubber roll, wherein the rubber roll having a flat outer peripheral surface has a rubber hardness of JIS A 70 ° to 90 °. And off-machine embossing equipment. 2. The off-machine embossing device for patterned paper according to claim 1, wherein the rubber of the rubber roll is nitrile rubber or urethane rubber.