JP2006052488A - Multiply combination paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide multiply combination paper in which a technique for preventing falsification applicable to valuables such as a coupon ticket or various kinds of tickets of a bank bill, a passport, a security, stamps, a merchandise tag, a toll road, etc. <P>SOLUTION: The multiply combination paper is obtained by successively laminating a lower paper layer, a nonwoven fabric to which an optical variable element is applied and an upper paper layer. In the multiply combination paper, the nonwoven fabric to which the optical variable element is applied is prepared by applying at least the one optical variable element to one surface and/or both surfaces of the nonwoven fabric. A region in which the optical variable element is applied has an exposed part that is at least partially exposed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention is a multilayer laminated paper in which a nonwoven fabric is formed between a lower paper layer and an upper paper layer, wherein at least one optical change element is attached to the nonwoven fabric, and the optical change element is provided. The areas given relate to multilayer laminated paper with exposed parts.

Anti-counterfeiting technology has been applied to valuable goods such as banknotes, passports, securities, stamps, product tags, toll road tickets, and various tickets. Therefore, authenticity determination is performed on such valuables by attaching an optical change element such as a hologram to the surface of the base material. An optically changing element such as a hologram is one of anti-counterfeiting elements particularly effective from the viewpoint of copy prevention and copy prevention, and has been applied to many valuable items.

For example, an anti-counterfeit label is disclosed in which a hologram transfer foil layer is attached and formed on the surface of a substrate (see Patent Document 1).

In addition, in a securities provided with holograms, a hologram-attached certificate in which a different pattern is engraved on each leaf like a split between the hologram and the paper (see Patent Document 2).

JP 61-182580 A (1st page, Fig. 1-4) JP 2000-355183 A (page 1-3, FIGS. 1 and 2)

However, the Internet has made it possible for anyone to know the principle of optical change elements such as holograms, and optical change elements with high reproducibility that cannot be distinguished at first glance have been forged and duplicated. ing. Therefore, forgery and tampering can be easily performed only by attaching a hologram to a substrate as disclosed in JP-A-61-182580. For this reason, as disclosed in Japanese Patent Application Laid-Open No. 2000-355183, a technique for imprinting a picture between a hologram and a base material and preventing the act of peeling and altering the hologram is disclosed. Similar to 61-182580, a hologram is affixed to the surface of the base material, so that a hologram with good reproducibility can be duplicated, affixed to the base material, and printed on it. There is. For these reasons, an element having a higher effect of preventing forgery has been demanded.

In JP-A-61-182580 and JP-A-2000-355183, a hologram is not provided in a spot shape in the paper layer, and the boundary between the hologram and the substrate is on the surface of the paper. For this reason, there is a problem that the hologram is easily peeled off because the hologram is affected by friction during distribution of the valuables with the hologram attached thereto. Also, by applying the hologram to the surface of the substrate, the hologram must be applied off-line after producing the paper, which increases the number of processes and is inefficient and expensive. Further, when a plurality of valuables are stacked after pasting, there is a problem that a difference in thickness occurs between the hologram region and other regions, and the stacked state becomes unstable. In addition, the window opening hologram thread is inserted into the paper, and the thread is exposed from the paper in the form of a window, but it is not provided in a spot shape in the paper layer but in a belt shape. Yes, the design was limited. Moreover, it was impossible to give it in the form of a spot.

From the above, the present invention is intended to solve the above-mentioned problems, and is a multilayer laminated paper in which a nonwoven fabric is woven between a lower paper layer and an upper paper layer, It has been found that by applying an optical change element such as a hologram to a nonwoven fabric, it can be applied in a spot shape in a paper layer. The region of the upper paper layer to which the optically changing element is applied is provided with an exposed portion where at least a part of the optically changing element is exposed, and is excellent in an anti-falsification effect and an anti-duplication effect, and is excellent in design flexibility. There is no problem that the optical change element is hardly affected by friction when the valuables with the optical change element attached are distributed, and the optical change element is not easily peeled off. It is possible to produce efficiently without performing the pasting work, and when multiple valuables overlap after pasting, they are stacked without causing a difference in thickness between the optically variable element area and other areas. The present invention proposes a multilayer laminated paper that does not become unstable in a state and a method for producing the same.

The present invention relates to a multi-layered laminated paper in which a lower paper layer, a nonwoven fabric provided with an optical change element, and an upper paper layer are sequentially laminated, and the nonwoven fabric provided with the optical change element is provided on one side of the nonwoven fabric. And / or at least one of the optically changing elements is attached to both sides, and the region to which the optically changing element is applied is a multi-layered laminated paper having an exposed portion at least partially exposed. is there.

The present invention is the multilayer laminated paper according to claim 1, wherein the optically variable element has a diffraction grating.

The present invention is a multi-layered laminated paper comprising at least three layers, wherein at least one optical change element is provided on the nonwoven fabric between the lower paper layer and the upper paper layer of the multi-layered paper, and the optical change In the region where the element is applied, by providing an exposed portion where at least a part is exposed, the optically changing element is provided in the paper layer, and the boundary between the optically changing element and the substrate is in the paper layer. The optical change element is not tampered with, and even if the optical change element is duplicated and pasted on the substrate, it can be seen that the optical change element is not present in the paper layer. Furthermore, it can be determined that the copy is a duplicate by a touch feeling or visual observation. Further, by providing at least one optical change element to the layer between the upper layer and the lower layer, the design flexibility is excellent.

In addition, since the boundary between the optical change element and the substrate is in the paper layer, the optical change element is hardly affected by friction during distribution of valuables with the optical change element attached, and has excellent wear resistance. The optical change element is excellent in peeling prevention effect, and when the optical change element sticking operation is performed on-line during the production of the paper, a multilayer paper having a high anti-counterfeit effect can be produced efficiently. Therefore, the efficiency of the work process can be improved. In addition, when multiple valuables are stacked after pasting, since the boundary between the optical change element and the substrate is in the paper layer, there is little difference in thickness between the optical change element area and other areas, and stacking The problem of instability in the state can be solved. In addition, by using a non-woven fabric for the layer between the lower paper layer and the upper paper layer of the multi-layered paper, it does not affect the squeezing, dehydration, etc. in the paper making process. Furthermore, the lower paper layer, the nonwoven fabric, and the upper paper layer are excellent in the delamination preventing effect because the fibers are intertwined and bonded to each other.

In addition, multilayer laminated paper is obtained by cutting a web wound by a paper machine, and at the paper making stage, the position of the optically variable element and its exposed portion is detected by a non-woven fabric position correcting device and a positional deviation detecting device. There is almost no deviation, and it can be arranged at a predetermined position.

The best mode for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the best mode for carrying out the invention described below, and includes various other embodiments within the scope of the technical idea described in the scope of claims.

(Multi-layered laminated paper)
FIG. 1 shows a multilayer paper (A1) composed of an upper paper layer (1) composed of fibers, a non-woven fabric (2) serving as an intermediate layer, and a lower paper layer (3) composed of fibers, and a sectional view thereof. In the intermediate layer (2), an optical change element (4) made of a hologram or the like is provided in a spot shape. An exposed portion (5) where at least a part of the optically variable element (4) provided on the nonwoven fabric (2) is exposed is provided. That is, the exposed portion (5) is formed in the region of the upper paper layer (1) where the optically variable element (4) is provided. All regions of the boundary (6) between the nonwoven fabric (2) and the optically variable element (4) are covered with fibers of the upper paper layer (1). Of course, the multi-layered laminated paper (A2) can be provided with a printing region (7) by a general printing method. Further, the print region (7) can be provided on the optical change element (4) made of a hologram or the like. The printing method is not particularly limited.

In FIG. 1, the entire region of the boundary (6) between the nonwoven fabric (2) and the optical change element (4) is covered with the fibers of the upper paper layer (1), but the nonwoven fabric (2) and the optical change element ( The effect of the present invention can be obtained if at least a part of the boundary (6) of 4) is covered with the fibers of the upper paper layer (1). However, preferably, as shown in FIG. 1, it is necessary that the entire region of the boundary (6) between the nonwoven fabric (2) and the optical change element (4) is covered with the fibers of the upper paper layer (1). 1 is provided with a single optical change element (4) in the form of a spot. The present invention is applicable to the multilayer paper as shown in FIGS. 2 (a, b). A plurality of optically variable elements (4) may be provided in a spot shape as in (A2, A3).

1 and 2, an optical change element (4) made of a hologram or the like is provided on one side of the nonwoven fabric (2), and at least a part of the optical change element (4) provided on the nonwoven fabric (2) is provided. Although the exposed part (5) to expose is provided, this invention is not limited to this, At least one optical change element (4) is formed in a spot shape on one side and / or both sides of the nonwoven fabric (2). It is possible to provide an exposed portion (5) to which at least a part of the optically variable element (4) provided to the nonwoven fabric (2) is exposed.

The optical change element is not peeled off and tampered with the fibers of the upper paper layer at the boundary portion, and even if the optical change element is duplicated and pasted to the substrate, the optical change element Is not present in the paper layer, and it can be determined that it is a duplicate by touch or visual observation. In addition, since the boundary between the optical change element and the substrate is in the paper layer, the optical change element is hardly affected by friction during distribution of valuables with the optical change element attached, and has excellent wear resistance. Excellent anti-peeling effect for optically variable elements.

As the optically variable element (4), a transfer foil, an aluminum foil, a foil having a diffraction grating, a hologram, or the like can be used. The hologram is not particularly limited to a transmission hologram, a reflection hologram, or the like. . Further, the shape of the optical change element (4) is not particularly limited, such as a special shape such as a circle, an ellipse, a polygon, and a star. Therefore, it can be read by at least one sensor such as reflected light, transmitted light, and magnetism.

  The pulp used for the upper paper layer and the lower paper layer is not particularly limited. For example, chemical pulp obtained by KP method or SP method using plant fibers such as wood and cotton, GP, TMP, Any pulp such as mechanical pulp such as CTMP, CGP, SCP, bleached pulp, recycled paper recycled pulp and the like can be appropriately selected and used.

The nonwoven fabric (2) to which the optically variable element (4) is affixed is preferably rayon. The thickness of the nonwoven fabric is about 10 μm to 200 μm, preferably about 5 μm to 60 μm. The width | variety of a nonwoven fabric (2) is not specifically limited, You may provide in strip shape between an upper paper layer (1) and a lower paper layer (3). When providing in strip shape, it is also possible to provide a plurality. By using a non-woven fabric, the lower paper layer, the non-woven fabric, and the upper paper layer are excellent in the effect of preventing delamination because the fibers are intertwined and bonded to each other during paper making.

In addition, it is possible to apply other anti-counterfeiting techniques to the multilayer laminated paper of the best mode for carrying out the present invention, such as colored fibers or strips, colorless fluorescent fibers or strips, colored fluorescent fibers or strips. At least one kind of piece, magnetic fiber or strip, metal strip, aluminum strip, fiber or strip having infrared absorption characteristics, fiber or strip having infrared reflection characteristics, thermochromic fiber or strip, etc. Can be mixed, and further, a thread, a cut image, or the like can be applied.

  The multi-layered laminated paper described above has been described with the three-layer structure of the upper paper layer (1), the nonwoven fabric (2), and the lower paper layer (3), but the upper paper layer (1) and the nonwoven paper (2) sandwiched between them. As long as the lower paper layer (3) is included, a multi-layer structure such as four layers or five layers may be used.

  Next, an example of the alignment of the optically changing element of the multilayer laminated paper and the exposed part thereof in the best mode for carrying out the present invention will be shown. FIG. 3 is a cross-sectional view taken along the line XX ′ when observed in the longitudinal direction of a strip-shaped multilayered laminated paper that is finally wound up by a winding drum in a multilayered sheeting apparatus according to the present invention described later. FIG. In this strip-shaped multilayer paper (B1), the non-woven fabric (2) to which the optical change element (4) is applied is made between the lower paper layer (3) and the upper paper layer (1). The structure formed integrally in multiple layers is shown. The optical change element (4) is provided in advance in the longitudinal direction of the non-woven fabric (2) at a plurality of intervals, or is supplied with non-woven fabric from a non-woven fabric supply device described later, and optical change is applied to the supplied non-woven fabric. It is applied at regular intervals by an element applicator.

  The multilayer laminated paper (B1) is provided with an exposed portion (5). The position of the exposed portion (5) (hereinafter referred to as “exposed portion position”) (p) with respect to (as a reference). ), The position (q) of the optically variable element (in the drawing, it is the position of one corner of the optically variable element (4), but if it is determined in advance, the center position or the like may be used). A position separated by a predetermined interval (s) in the longitudinal direction of the paper (B1) (the direction in which the paper moves on the wire during paper making) is determined, and a position separated by a predetermined interval (t) in the width direction. The non-woven fabric (2) to which the optical change element (4) is applied is inserted and fixed. In this case, the nonwoven fabric provided with the optically variable element (4) by one or both of the predetermined interval (s) in the longitudinal direction and the predetermined interval (t) in the width direction of the multilayer laminated paper (B1). (2) is inserted and fixed.

(Modification 1)
As shown in FIG. 4, the multi-layered laminated paper (B2) is provided with a clearance (8), and the position of the clearance (8) (hereinafter referred to as “the clearance position”) (r). On the other hand (on the basis), the position (q) of the optical change element (in the drawing, it is the position of one corner of the optical change element (4), but it may be the center position or the like if determined in advance). Is defined as a position separated by a predetermined interval (s) in the longitudinal direction of the multilayer laminated paper (B2) and a position separated by a predetermined interval (t) in the width direction, and the optical change element (4) is applied. The formed nonwoven fabric (2) is inserted and fixed. In this case, the nonwoven fabric provided with the optically variable element (4) by either one or both of a predetermined interval (s) in the longitudinal direction and a predetermined interval (t) in the width direction of the multilayer laminated paper (B2). (2) is inserted and fixed.

(Modification 2)
As shown in FIG. 5, the multi-layered paper (B3) has white register marks or IJP (inkjet printer) marks (9) as shown by cross marks. Has been granted. In the second modification, focusing on the register mark or IJP mark (9), the optical change element (4) is in the longitudinal direction and / or with respect to the register mark or IJP mark (9). Alternatively, it is configured to be placed at a position separated by a predetermined interval in the width direction. The position (q) of the optically variable element (4) is set to a predetermined distance (s) in the longitudinal direction with respect to the position (v) of the register mark or IJP mark (9) (cross point of the cross mark) and the width. The non-woven fabric (2) provided with the optical change element (4) is inserted and fixed so as to be separated by a predetermined interval (t) in the direction.

  Since the multilayer laminated paper (B1, B2, B3) described above has an exposed portion in the optically variable element, the optically variable element is based on the exposed portion position, the insertion position, the register mark or the mark by IJP. As a fixed position. When the optically changing element is not provided with an exposed portion, it is not such a standard, and when the multilayer laminated paper wound up by the winding device is cut, the side of the cut multilayer laminated paper is not Cutting is performed so that the distance from the position to the position (q) of the optical change element is a predetermined interval. As a result, the optically variable element of the multilayered laminated paper manufactured from the multilayered laminated paper wound up by the winding device is arranged at a predetermined position.

(Manufacturing equipment)
Next, an apparatus for producing multilayer laminated paper of the best mode for carrying out the present invention will be described with reference to FIG. FIG. 6 is a diagram showing an overall configuration of a multilayer laminated paper manufacturing apparatus. In FIG. 6, this multi-layer paper making apparatus (11) has a wire 12 for endless paper making which is made of a net and circulates. The wire (12) is bridged between the driven pulley (13) and the driving pulley (14), and further, although not shown, a plurality of supports and a plurality of supports arranged on the inner side along the wire (12) It is supported by a guiding roll and is guided to circulate.

  In the upstream part (movement start end part on the upper surface of the wire) (15) of the wire (12), from the upstream side toward the downstream side, the lower layer material supply tank (16), the nonwoven fabric supply device (17), the upper layer material Supply tanks (18) are sequentially arranged at intervals.

  The lower layer stock supply tank (16) and the upper layer stock supply tank (18) are respectively filled with the lower layer stock (19) and the upper layer stock (20), and are appropriately replenished from a supply source (not shown). The liquid level is controlled to be maintained. The lower layer stock (19) and the upper layer stock (20) are materials composed of the material of the lower paper layer (3) and the upper paper layer (1), and are mainly composed of pulp fibers, water and additives.

  In the downstream portion of each of the lower layer material supply tank (16) and the upper layer material supply tank (18), a lower sheet material sealing plate (21) and an upper layer material sealing plate (22) are arranged. Yes. The lower layer paper and the upper layer paper are respectively placed on the wires (12) through the gaps between the lower sheet material (21) and the upper layer paper (22) and the wire (12). Supply paper and make paper.

  The non-woven fabric supply site by the non-woven fabric supply device (17) is provided downstream of the lower layer stock supply tank (16) and upstream of the upper layer stock supply tank (18). 12) A sheet is fed toward a lower stock layer (wet paper) (23) formed thereon. This nonwoven fabric supply device (17) is for correcting the insertion position of the optical change element (4) applied to the nonwoven fabric supply drum (24), the tension roll (25), and the nonwoven fabric (2) in the paper making direction. A position correction roll (29) in the position correction device (26) is provided.

A strip-shaped nonwoven fabric (2) is wound around the nonwoven fabric supply drum (24), and the nonwoven fabric (2) is supplied while being fed out toward the wire (12). As described above, an optical change element is previously applied to the belt-shaped nonwoven fabric at a certain interval in the longitudinal direction. However, when an optical change element is not previously applied to the nonwoven fabric, the optical change element is attached to the nonwoven fabric while the nonwoven fabric (2) is fed out from the nonwoven fabric supply drum (24) toward the wire (12). Optical change elements are applied by the device (38) at regular intervals in the longitudinal direction.

  The width (w) of the strip-shaped nonwoven fabric (2) supplied from the nonwoven fabric supply device (17) is formed by being supplied from the lower layer material sealing plate (21) to the upper surface (conveying surface) of the wire (12). The width of the lower layer paper layer (lower wet paper) (23) is substantially the same as that of the lower layer paper layer (23), and is further supplied from the upper layer material sealing plate (22) to the upper surface of the lower layer material layer (23). The width of the upper paper stock layer (upper wet paper) (27) is substantially the same.

  The nonwoven fabric position correcting device (26) has a position controller (28) for controlling the position correcting roll (29). In the position correction roll (29), the interval between the exposed portion position (p) of the multilayer laminated paper (B) and the optically variable element position (q) is deviated from a predetermined interval (s) preset in the longitudinal direction. In this case, the roll corrects the positional deviation between the nonwoven fabric and the optical change element. In the modification example 1, when the interval between the insertion position (r) and the optical change element position (q) is deviated from a predetermined interval (s) set in the longitudinal direction, the positions of the nonwoven fabric and the optical change element are changed. In the second modification, the shift of the position of the optical change element position (q) with respect to the register mark or IJP mark position (v) is shifted from a predetermined distance (s) set in advance in the longitudinal direction. In such a case, the positional deviation between the nonwoven fabric and the optical change element is corrected.

  The position correction roll (29) is driven by a motor whose speed can be controlled by a control signal from the position controller (28), and has a roll configuration capable of feed control capable of positively increasing or decreasing the feed speed of the nonwoven fabric (2). To do.

The nonwoven fabric supply drum (24) moves along the longitudinal direction of its axis (direction perpendicular to the paper surface in FIG. 6), that is, the width direction of the nonwoven fabric (2), and moves along with the wound nonwoven fabric to position in the width direction. The non-woven fabric supply drum width direction position adjusting device (not shown) is adjusted so as to be adjusted. Thereby, as will be described later, in the multi-layered paper, the optical change element position (q) is set at a predetermined interval (t) set in advance in the width direction of the multi-layered paper (B) from the exposed portion position (p). ), The nonwoven fabric (2) can be moved in the width direction with respect to the multilayer laminated paper (B) to correct the deviation. In the first modification, when the gap between the insertion position (r) and the optical change element position (q) is deviated from a predetermined interval (t) set in advance, the position of the nonwoven fabric and the optical change element is shifted. In modified example 2, when the position (v) of the register mark or IJP mark is shifted from a predetermined interval (t) set in advance in the width direction of the optically variable element position (q), The displacement can be corrected by moving the nonwoven fabric (2) in the width direction with respect to the multi-layered laminated paper (B).

  A water squeezing box (30) is disposed below the wire (12) at the downstream side (the movement terminal portion on the upper surface of the wire). The water extraction box (30) sucks water contained in the lower layer paper layer (23), the nonwoven fabric (2) and the upper layer material layer (27) in the downstream portion of the wire (12) in the paper making process. And squeezing water.

  The multilayer laminated paper (B) formed of the wire (12) is guided by a guide roll (not shown) and wound up by a winding roll as a final product, but between the wire (12) and the winding roll, From the upstream side, an exposed portion forming device (34), a press roll (31), a drying device (32) (indicated by an imaginary line in FIG. 6) and a positional deviation detecting device (33) are arranged. The press roll (31) is used in the case of the first modification, or in the case where a crease is imparted to the multilayer laminated paper.

The exposed portion forming device (39) includes an exposed portion in a region provided with the optical change element (4) in the lower layer paper layer (23) and / or the upper layer paper layer (27) of the multi-layered laminated paper. It is a device for forming. FIG. 6 shows an example applied to the upper paper layer. The exposed portion forming device (39) includes a liquid discharge nozzle, an air discharge nozzle, a press roll, a dandy roll, and the like. The liquid discharge nozzle and the air discharge nozzle are controlled so as to be ejected at regular intervals in accordance with the paper making speed, and exposed portions are formed at regular intervals. Similarly, the rotational speed of the press roll or dandy roll is controlled together with the papermaking speed, and exposed portions are formed at regular intervals. An example is shown in FIG. As shown in FIG. 7 (a), the dandy roll (40) provided with the convex portion (41) provides an exposed portion where at least a part of the optically variable element is exposed. As shown in FIG. 2, at least one part of the optical change element is exposed by injecting compressed air to the lower paper layer (23) and / or the upper paper layer (27) by at least one air nozzle (42). You may give an exposed part. The compressed air of the air nozzle (42) can control the position, timing, air pressure, etc. according to the paper making speed, the air pressure is about 0.5 to 4.0 Kg / cm 2, and the direction of jetting is the lower paper layer A direction perpendicular to (23) and / or the upper stock layer (27) is preferred. Further, it is also possible to form an exposed portion by ejecting liquid by a liquid ejecting nozzle instead of the air nozzle (42). The pressure is about 0.5 to 4.0 Kg / cm @ 2, and the direction of jetting is preferably perpendicular to the lower stock layer (23) and / or the upper stock layer (27).

  The press roll (31) sandwiches the multilayered laminated paper (B) and sends it to the downstream winding roll side. The gap (8) is formed by a well-known press roll (31) or tundee roll (35). The drying device (32) uses a known drying device.

  The position deviation detection device (33) includes a position detector (34) and a position deviation discriminator (36). The position detector (34) is an optical detection means having a CCD, and utilizes the transmitted light from the light table (37) arranged on the opposite side across the multilayer laminated paper (B) to be detected. Then, by detecting the exposed portion position (p) and the optical change element position (q), the distance between the two is measured, and this is sent as an electric signal to the position shift discriminator (36). In the first modification, the insertion position (p) and the optical change element position (q) are detected, and in the second modification, the register mark or IJP mark position (v) and the optical change element position (q) are detected. To detect.

  The position deviation discriminator (36) includes a distance between the exposed portion position (p) sent from the position detector (34) and the optical change element position (q), and a predetermined interval (s) set in advance. The magnitude of the deviation and the direction of the deviation are discriminated and sent as position deviation information to the position controller (28). It should be noted that the distance in the width direction between the exposed portion position (p) and the optical change element position (q) is measured, and the difference between the vertical direction (paper making direction) and the horizontal direction (horizontal width direction) is also detected. However, the detection of the deviation is basically the same. In the first modification, the size of the gap between the gap position (p) and the optical change element position (q) and the predetermined gap (s) set in advance and the direction of the gap are determined. This is an example of sending data of deviation information to the position controller (28). In the second modification, the difference between the position (v) of the mark (8) by the register mark or the IJP and the optical change element position (q) and the predetermined interval (s) set in advance and its size This is an example in which the direction of deviation is determined and data of positional deviation information is sent to the position controller (28). In the first and second modified examples, the distance in the width direction between the exposed portion position (p) and the optical change element position (q) is measured, and when the deviation is detected, the vertical direction (papermaking direction) Although there is a difference in the horizontal direction (horizontal width direction), the detection method and detection apparatus for the deviation are basically the same.

  In Modification 3, an optical change element is detected by detecting the transmitted light from the light table in the vicinity of a cutting device (not shown) for cutting the multi-layered paper wound on the winding device. A position detector for detecting the position is provided. Based on the optical change element position information detected by this position detector, the distance from the position of the side of the multilayer paper (B) to be cut to the insertion position of the optical change element is a predetermined distance. Thus, the cutting device is controlled.

(Production method)
The method for producing the multi-layered laminated paper will be sequentially described below.
(1) Supply the lower layer material (19) from the lower layer material supply tank (16) to the upper surface of the wire (12) being circulated through the gap between the sealing plate (21) for the lower layer material and the wire (12). To do. The lower layer stock (23) supplied on the wire (12) is sent in the paper making direction as the lower layer stock layer (23).

(2) The strip-shaped nonwoven fabric 2 provided with the optical change element is continuously supplied from the nonwoven fabric supply device (17) to the upper surface of the lower layer stock layer (23). However, if the nonwoven fabric is not preliminarily provided with the optical change element, the optical change element is applied to the nonwoven fabric while the nonwoven fabric (2) is fed out from the nonwoven fabric supply drum (24) toward the wire (12). Optical change elements are applied by the device (38) at regular intervals in the longitudinal direction. Then, the strip-shaped non-woven fabric (2) and the lower layer stock layer (23) overlap while being fed in the paper making direction on the wire (12), and the lower layer stock (19) enters between the fibers of the non-woven fabric (2). The pulp fiber of the stock (19) and the fiber of the nonwoven fabric (2) are entangled and a strong bond between the two is generated.

(3) On the upper surface of the strip-shaped non-woven fabric (2) overlapped with the pulp fibers of the lower layer stock (19), the upper layer stock supply plate (22) and the wire (12 ) To supply the upper layer stock (20). Then, the upper layer stock (20) overlaps with the non-woven fabric (2) while being sent in the paper making direction as the upper layer stock layer (27) on the wire (12), and the upper layer stock (20) is a fiber of the non-woven fabric (2). Get in between. As a result, the pulp fibers of the upper layer stock (20) are intertwined with the fibers of the non-woven fabric (2) and are also intertwined with the pulp fibers of the lower layer stock (19) already in the non-woven fabric (2). It will be generated.

(4) In this way, the lower layer stock (19), the non-woven fabric (2) and the upper layer stock (20) to which the optical change element is applied are sequentially supplied on the wire (12), and are stacked in multiple layers. By making the paper, the fibers of the lower layer stock (19), the non-woven fabric (2) and the upper layer stock (20) are entangled with each other to form a strong bond layer. In this bond layer, an optical change element ( Paper making of a multilayer multilayer paper (B) formed by inserting 4) is performed.

(5) The multi-layered laminated paper (B), which has been laminated in multiple layers, passes through the squeezing box (30), and is provided with the optically changing element (4) of the multi-layered laminated paper. The exposed portion (5) is formed by the exposed portion forming device (39) so that at least a part of (23) and / or the upper paper layer (27) is exposed. The exposed portion (5) is applied at a position spaced apart from the optically variable element position (q) in the longitudinal direction (paper making direction) of the multi-layered laminated paper (B) by a predetermined interval (s). To be. That is, the timing of the exposed portion (5) is set by controlling the rotational speed of the exposed portion forming device in consideration of the wire feed speed and the position of the optical change element in the nonwoven fabric. However, in actuality, at the time of inserting the nonwoven fabric, the optically variable element position (q) is shifted from a position separated by a predetermined interval (s) set in advance with respect to the expected exposed portion position (p). Therefore, it is necessary to correct the misalignment position as will be described later.

(6) The multilayer laminated paper (B) formed in this way is further dried by passing through a drying device to be completed as a final product. Then, the multi-layered paper (B) is sent to a winder as a product, and the position shift detection device (33) determines the position of the exposed portion (p) and the optical change element position (q). For the actual interval, the amount of deviation from a predetermined interval (s) set in advance is detected, position deviation information is generated, and sent to the position controller (28) of the position correction device (26). Similarly, the actual distance in the width direction between the optically variable element position (q) and the exposed portion position (p) from the predetermined distance (t) set in advance by the position shift detection device (33). The amount of displacement is detected and position displacement information is generated and sent to the position controller (28) of the position correction device (26).

  The multi-layered paper without the exposed portion is sent to a winding device for winding as a product, and a misalignment detection device (33) is used to detect a cleaning position (r), a register mark or an IJP mark ( v) and the actual distance between the optical change element position (q), the amount of deviation from a predetermined interval (s) set in advance is detected to generate position deviation information, and the position correction device (26) Send to position controller (28).

In the case of applying the penetration (8) by the press roll (31), the water passes through the squeezing box (30) and the penetration (8) is applied by the press roll 31. This insertion (8) is performed at a predetermined distance (s) from the optical change element position (q) in the longitudinal direction (paper making direction) of the multi-layered paper (B). To be. That is, in consideration of the wire feed speed and the optical change element position in the nonwoven fabric, the rotational speed of the press roll (31) is controlled to set the timing of the penetration (8). However, in actuality, at the time of inserting the nonwoven fabric, the optically variable element position (q) is shifted from a position away from the planned insertion position (r) by a predetermined interval (s). It is necessary to correct the misalignment position as will be described later.

(7) The position controller (28) receives the position shift information and controls the position correction roll (29) to control the feeding of the nonwoven fabric (2). That is, by adjusting the feed speed of the position correction roll (29) via the motor by the position controller (28), the feed speed of the belt-like nonwoven fabric (2) is increased or decreased to enter the nonwoven fabric (2). The relative position in the paper making direction of the applied optical change element (4) with respect to the lower paper layer (23) can be adjusted, and the distance between the optical change element position (q) and the exposed portion position (p) is set in advance. It can correct so that it may become a predetermined interval (s) set. When the exposed portion is not provided, the multi-layered laminated paper adjusts the feed speed of the position correction roll (29) via the motor by the position controller (28), so that the feed speed of the strip-shaped nonwoven fabric (2) is adjusted. The relative position of the paper making direction with respect to the lower stock layer (23) of the optical change element (4) applied in the nonwoven fabric (2) by raising or lowering can be adjusted, and the optical change element position (q) Then, the interval between the mark position (r), the register mark or the mark (v) by IJP can be corrected so as to be a predetermined interval (s) set in advance.

  The positional deviation information in the width direction between the optical change element position (q) and the exposed portion position (p) sent to the position controller (28) is the nonwoven fabric supply in the width direction of the nonwoven fabric supply drum (24) (not shown). It is sent to the drum width direction position adjusting device, whereby the non-woven fabric (2) can be moved in the width direction with respect to the multi-layered paper (B) to correct the deviation.

It is also possible to produce a multi-layered laminated paper having different colors, basis weights or fiber configurations by changing the stock characteristics of the raw materials stored in the lower layer stock supply tank (16) or the upper layer stock supply tank (18). Is possible. The color can be adjusted depending on the type of fiber, mixing of pigments and dyes, bleached or unbleached, etc. The basis weight can be adjusted by adjusting the raw material concentration and the raw material discharge section. Adjustment can be made by changing the fiber type, blending ratio, fiber length, beating degree, and the like.

EXAMPLES Hereinafter, although this invention is demonstrated further in detail using an Example, the content of this invention is not limited to the range of these Examples.

Example 1
Using the multi-layered laminated paper manufacturing apparatus shown in FIG. 6, softwood bleached kraft pulp, lower layer stock (19) with beating degree adjusted to Canadian standard freeness 550 ml from lower layer stock supply tank (16) to lower layer The lower layer stock (19) is supplied to the upper surface of the circulating wire (12) through the gap between the stock plug (21) and the wire (12). The lower layer stock (23) supplied on the wire (12) is sent in the paper making direction as a lower layer stock layer (lower wet paper) (23).

The basis weight is 12g / m2, thickness is 35μm, and the air permeability is an index of water permeability. The optical change element composed of rayon fiber with high air permeability below the measurement limit by JIS air permeability test method is attached in advance. The rolled-up nonwoven fabric (2) is set on the nonwoven fabric supply drum (24), and the upper surface of the lower layer stock layer (23) is provided with an optical change element from the nonwoven fabric supply device (17). The non-woven fabric (2) is continuously supplied. Upper layer paper supply tank (20) prepared by adjusting 570 ml of Canadian standard freeness on the upper surface of strip-shaped non-woven fabric (2) overlapped with pulp fibers of lower layer paper stock (19) The upper layer stock (20) is supplied from (18) through the gap between the upper layer stock plug (22) and the wire (12). Then, the upper layer stock (20) overlaps with the non-woven fabric (2) while being sent in the paper making direction as the upper layer stock layer (27) on the wire (12), and the upper layer stock (20) is a fiber of the non-woven fabric (2). Get in between. Thereby, the pulp fibers of the upper layer stock (20) are intertwined with the fibers of the non-woven fabric (2) and are also intertwined with the pulp fibers of the lower layer stock (19) already entering the non-woven fabric (2).

The multi-layered laminated paper that has been bonded to the multi-layer passes through the squeezing box (30), and the exposed portion is exposed so that a part of the upper paper layer (27) to which the optical change element (4) is applied is exposed. An exposed portion (5) is formed by the former (39). The exposed portion (5) is provided at a position spaced apart from the optically variable element position (q) in the longitudinal direction (paper making direction) of the multi-layered paper by a predetermined interval (s). Furthermore, it passes through the inside of the drying device and is dried to complete a multi-layered laminated paper.

Then, in the middle of being sent to the winding device that winds up as a product, the positional deviation detection device (33) sets a predetermined interval that is set in advance with respect to the actual interval between the exposed portion position (p) and the optical change element position (q). The amount of deviation from the interval (s) is detected, position deviation information is generated, and sent to the position controller (28) of the position correction device (26). Further, the positional deviation detecting device (33) shifts the actual distance in the width direction between the optically variable element position (q) and the exposed portion position (p) from a predetermined distance (t) set in advance. Is detected and position deviation information is generated and sent to the position controller (28) of the position correction device (26).

(Example 2)
Using the multi-layered laminated paper manufacturing apparatus shown in FIG. 6, softwood bleached kraft pulp, lower layer stock (19) with beating degree adjusted to Canadian standard freeness 550 ml from lower layer stock supply tank (16) to lower layer The lower layer stock (19) is supplied to the upper surface of the circulating wire (12) through the gap between the stock plug (21) and the wire (12). The lower layer stock (23) supplied on the wire (12) is sent in the paper making direction as the lower layer stock layer (23).

Prepare a non-woven fabric (2) composed of rayon fibers with high air permeability below the measurement limit by JIS air permeability test method, with a basis weight of 12g / m2, thickness of 35μm, and air permeability as an indicator of water permeability. While the wound nonwoven fabric (2) is set on the nonwoven fabric supply drum (24), the nonwoven fabric (2) is fed from the nonwoven fabric supply drum (24) while being fed out toward the wire (12). The optical change element is applied at regular intervals in the longitudinal direction by the optical change element applicator (38). On the upper surface of this lower layer stock layer (23), a strip-shaped nonwoven fabric (2) provided with an optical change element is continuously fed from a nonwoven fabric feeder (17). Upper layer paper supply tank (20) prepared by adjusting 570 ml of Canadian standard freeness on the upper surface of strip-shaped non-woven fabric (2) overlapped with pulp fibers of lower layer paper stock (19) The upper layer stock (20) is supplied from (18) through the gap between the upper layer stock plug (22) and the wire (12). Then, the upper layer stock (20) overlaps with the non-woven fabric (2) while being sent in the paper making direction as the upper layer stock layer (27) on the wire (12), and the upper layer stock (20) is a fiber of the non-woven fabric (2). Get in between. Thereby, the pulp fibers of the upper layer stock (20) are intertwined with the fibers of the non-woven fabric (2) and are also intertwined with the pulp fibers of the lower layer stock (19) already entering the non-woven fabric (2).

The multi-layered laminated paper that has been bonded to the multi-layer passes through the squeezing box (30), and the exposed portion is exposed so that a part of the upper paper layer (27) to which the optical change element (4) is applied is exposed. An exposed portion (5) is formed by the former (39). The exposed portion (5) is provided at a position spaced apart from the optically variable element position (q) in the longitudinal direction (paper making direction) of the multi-layered paper by a predetermined interval (s). Furthermore, it passes through the drying device and is dried to complete a multi-layered laminated paper. The alignment in the width direction and / or the longitudinal direction of the optical change element position (q) and the exposed portion position (p) is the same as that in the first embodiment.

The figure which shows the multilayer paper (A1) which consists of the upper paper layer (1) which consists of fibers, the nonwoven fabric (2) which consists of fibers, and the lower paper layer (3) which consists of fibers, and its XX 'sectional drawing . The figure which shows the multilayer paper (A2, A3) which consists of the upper paper layer (1) which consists of fiber, the nonwoven fabric (2) which consists of fiber, and the lower paper layer (3) which consists of fiber, and its XX 'sectional drawing It is. It is the figure which shows an example of position alignment of the optical change element of the multilayer laminated paper of the best form for implementing this invention, and its exposure part, and its X-X 'sectional drawing. It is the figure which shows an example of position alignment of the optical change element of the multilayer laminated paper of the best form for implementing this invention, and its exposure part, and its X-X 'sectional drawing. It is the figure which shows an example of position alignment of the optical change element of the multilayer laminated paper of the best form for implementing this invention, and its exposure part, and its X-X 'sectional drawing. It is a figure which shows the manufacturing apparatus of the multilayer laminated paper of the best form for implementing this invention. It is a figure which shows an example of an exposed part formation device (39).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper paper layer 2 Nonwoven fabric 3 Lower paper layer 4 Optical change element 5 Exposed part 6 Boundary 7 Printing area 8 Pitch 9 Mark by register mark or IJP 11 Multi-layer sheeting device 12 Wire for paper making 13 Driven pulley 14 Drive Pulley for wire 15 Upstream portion of wire 16 Lower layer material supply tank 17 Non-woven fabric supply device 18 Upper layer material supply tank 19 Lower layer material 20 Upper layer material 21 Lower sheet material sealing plate 22 Upper layer material sealing plate 23 Lower layer paper Layer (wet paper)
24 Nonwoven fabric supply drum 25 Tension roll 26 Position correction device 27 Upper layer paper layer (upper wet paper)
DESCRIPTION OF SYMBOLS 28 Position controller 29 Position correction roll 30 Squeezing box 31 Press roll 32 Drying device 33 Position shift detection device 34 Position detector 35 Tandy roll 36 Position shift discriminator 37 Light table 38 Optical change element sticker 39 Exposed part formation device 40 Tandy roll 41 Convex part 42 Air nozzle p Exposed part position q Optical change element position r Clearing position v Register mark or mark position by IJP s Longitudinal direction t Spacing in the width direction w Width of lower layer material layer A1, A2 A3, B, B1, B2, B3 Multilayer laminated paper

Claims (2)

In multi-layered laminated paper in which a lower paper layer, a nonwoven fabric provided with an optical change element, and an upper paper layer are sequentially laminated,
The nonwoven fabric provided with the optical change element is formed by attaching at least one optical change element on one side and / or both sides of the nonwoven fabric,
A multi-layered laminated paper in which the region provided with the optically variable element has an exposed portion at least partially exposed. The multilayer laminated paper according to claim 1, wherein the optically variable element comprises a diffraction grating.

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