JPH10249970A - Bonding sheet and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a partial bonding part opened at an interval by forming coating pattern of adhesive in a simple shape. SOLUTION: An adhesive 2 is applied in a strip-like state between sheets. A pressurized region 3 is formed by opening an interval along a coating region of adhesive by embossing wider than the strip-like coating region. Accordingly, the sheets are rigidly fixed at a superposed part of the region 3 and the coating region of the adhesive 2 to form a bonding part (a). The adhesive coats in a strip-like state to make coating amount of the adhesive at the part (a) uniform, and sufficient adhesive strength can be obtained. And, the coating step of the adhesive becomes simple.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention is used as a wet or dry wiping sheet for cleaning, disinfecting or disinfecting flush toilets, for wiping the human body, or for cleaning or toweling indoors. The present invention relates to a bonded sheet to be manufactured and a method for manufacturing the same.

[0002]

2. Description of the Related Art Wet sheets are used for cleaning toilets and rooms, or toweling. This wet sheet is made of paper made of wood pulp fiber, etc.
Alternatively, a nonwoven fabric formed of water-absorbing fibers is impregnated with a cleaning chemical. The detergent solution contains a surfactant, a detergent component, a preservative, a fragrance, and the like in water and alcohol. Further, as a wet sheet for cleaning a flush toilet, a water-disintegratable sheet (water-disintegrated paper) impregnated with a chemical solution for suppressing water disintegration is used. As such a wiping sheet, there is a wiping sheet in which a plurality of sheets are overlapped and joined so as to give a sense of volume when held by hand. As a joining method for partially joining a plurality of sheets, there is a method using an adhesive. In particular, in the case of a wet sheet that can be poured into a flush toilet, the water-disintegrable sheet is joined with a water-soluble adhesive.

[0003]

When a sheet such as paper or nonwoven fabric is bonded with an adhesive, a step of applying the adhesive to the surface of the sheet is required. In this adhesive application step, it is relatively easy to apply the adhesive uniformly over a predetermined area of the surface of the sheet. However, in the case where the sheets are joined via an adhesive applied to a wide area, the occupancy ratio of the area of the adhesive joint to the area of the sheet is widened, and the overall feeling becomes rugged and the soft feeling is poor, The holding feeling by hand becomes worse. Further, if the adhesive bonding area is too large, the effect of wiping off dirt on the sheet surface is also reduced. Therefore, when the sheets are joined with an adhesive, the adhesive is applied in a predetermined pattern at intervals on the sheet surface, and the embossed area corresponding to the adhesive application pattern is used to form the adhesive application area. It is preferable to apply pressure to form an adhesive joint portion that matches the adhesive application pattern. When the sheets are partially joined at intervals, a soft feeling can be given to the entire sheet, the area ratio of the adhesive joint area can be reduced, and the wiping effect on the sheet surface can be enhanced.

Further, the inventor of the present invention disclosed in Japanese Patent Application No. 257032 in 1996 that sheets having different crepe ratios were joined to each other by partial joining portions, and the sheets were restored by crepe when impregnated with a chemical solution. It was proposed to form a bulge in the sheet between the joints due to the difference in the elongation of the sheet, thereby forming a bulky wiping sheet. Also in this case, in order to generate a regular swelling on the sheet surface, it is necessary to form a joining portion for joining the sheets at predetermined intervals. However, a special process such as a screen printing method is required to apply the adhesive on the surface of the sheet at predetermined intervals. In this case, the application pattern of the adhesive applied to the sheet surface and the pressure emboss of the embossing roll for pressing the sheet must be aligned with each other, which makes setting and adjustment of work equipment complicated. It becomes something.

The present invention has been made to solve the above-mentioned conventional problems. In a case where a plurality of sheets are joined at a partial joining portion, an adhesive application pattern is formed in a simple shape, and a portion having an interval is provided. It is an object of the present invention to provide a bonding sheet capable of forming a typical bonding portion and a manufacturing method thereof.

[0006]

According to the present invention, there is provided a bonded sheet in which a plurality of sheets are partially bonded, an adhesive is applied in a band shape to a mating surface of the sheets, and the adhesive is applied to a band-shaped application area of the adhesive. The sheet is partially pressurized at intervals along the sheet, and the sheets are fixed with the adhesive in the pressurized area to form a partial joint.

In the above, the width dimension of the pressure area is
It is preferable that the width is larger than the width of the band-shaped application region of the adhesive.

[0008] For example, the plurality of sheets to be joined include one or more creped first sheets and a second sheet having a lower crepe rate or no crepe than the first sheet. The crepe of the first sheet is restored, a bulge is formed between the joints, and the whole is made bulky. When this bulky sheet is used as a wiping sheet, the feeling of holding by hand is excellent, and the impregnation rate of the chemical solution is increased.

When used as a wiping sheet that can be poured into a flush toilet, the sheet is a water-disintegratable sheet containing a water-soluble or water-swellable binder, and the adhesive is a water-soluble adhesive. is there.

In this case, the binder and the water-soluble adhesive are made of the same substance, and the sheet is impregnated with a chemical solution for suppressing the dissolution of both the binder and the water-soluble adhesive. Is preferred.

The bonding sheet of the present invention is obtained by laminating a plurality of sheets and partially bonding them, and is used as a bulky wet or dry wiping sheet.
Alternatively, it is used as a soft sheet for other uses than the wiping sheet. The sheet is paper formed by a wet papermaking method or the like, or a nonwoven fabric containing water-absorbing fibers.

In this bonding sheet, an adhesive is applied in a strip shape to the mating surfaces of the sheets, but the actual bonding portion, the main bonding portion, or the bonding portion having the highest bonding strength is
It is formed by partially providing a pressurized region at intervals along the band-shaped application region of the adhesive. Therefore,
The adhesive can be continuously applied to the sheet surface, so that the application process of the adhesive can be simplified, and the adhesive having a relatively high viscosity can be uniformly applied. Moreover, since the joints that firmly bond the sheets to each other are formed at intervals, the area ratio of the joints is reduced, the flexibility of the entire sheet can be maintained, and the sheets are held by hand and wiped off. The feeling when performing is improved. In addition, since the area ratio of the adhesive joint can be reduced, a wide surface used for wiping dirt can be secured on the sheet surface.

In a preferred embodiment of the present invention, as shown in FIG. 2A, the sheet flow direction (MD;
The adhesive is formed in a plurality of rows in a band along the ine direction, and the joining portions are formed in a row along the band-shaped adhesive application region at an equal pitch. The joined first sheet is creped paper, and the joined second sheet is a paper having a lower crepe rate or no crepe than the first sheet.
When the sheet is impregnated with a chemical solution after joining, the crepe of the first sheet is restored and elongation occurs, and uneven wrinkles are formed by swelling according to the pitch of the joining portion.

When this bonding sheet is used as a wiping sheet, the whole is bulky and easily held by hand, and in the wiping operation, dirt due to the uneven wrinkles can be effectively removed.

Further, as shown in FIG. 2B, when the width of the pressing area is set to be larger than that of the adhesive band-shaped application area, the adhesive application area and the pressure applied by an emboss roll or the like are set. Even if the area is slightly displaced in the X direction, the adhesive applied area surely enters the pressurized area, and the area of the joint can be secured as set in the pressurized area, and the adhesive strength of the entire sheet decreases. Can be prevented.

Further, two sheets may be joined, or two sheets having a high crepe rate and a second sheet having a low crepe rate or having no crepe in the middle may be used. It may have a sheet structure.

The sheet of the present invention contains paper containing natural fibers such as wood pulp, cotton fiber, hemp fiber, and bamboo fiber as the water-absorbing fibers, or the natural pulp fiber and a chemical fiber such as rayon. Paper or a non-woven fabric formed from these fibers.

As an adhesive used for bonding between sheets, a hot melt adhesive such as an EVA-based adhesive can be used. When used as a wet wiping sheet, the sheet contains a cleaning solution. As the cleaning chemical, a liquid containing a surfactant, a cleaning component, a preservative, a fragrance, and the like in water and alcohol is used. Alternatively, it may be sold in a dry state, and the user impregnates with water or the above-mentioned cleaning chemicals at the time of use.

Further, the sheet is a water-disintegrable sheet (water-disintegrated paper) comprising fibers such as natural pulp and a water-soluble or water-swellable binder such as carboxymethylated pulp or carboxymethylcellulose, which can be poured into a flush toilet. In this case, the sheets are bonded with a water-soluble adhesive such as carboxymethylcellulose to form the joint. In this case, as the cleaning liquid to be contained in the sheet, a liquid containing alcohol and metal ions such as calcium and strontium in water is used. The dissociation of the sheet and the dissolution of the adhesive by the chemical solution impregnated in the sheet are suppressed by this metal ion, so that the sheet strength can be maintained during use, and the cleaning chemical solution is diluted with water after flowing into the flush toilet. This allows the sheet to be hydrolyzed and the adhesive to be released.

In the present invention, since the pressurized area is formed with an interval with respect to the water-soluble adhesive applied in a belt shape, the bonding strength between the sheets by the water-soluble adhesive is not included in the area other than the pressurized area. It is getting weaker. Alternatively, the sheet is hardly bonded except in the pressure region. Therefore, when the drug solution is diluted with a large amount of water, the dissolution of the water-soluble adhesive in a portion other than the pressurized region occurs quickly, and the dissolution of the sheet is promoted.

When the above-mentioned water-disintegrable sheet is used, any combination of a water-soluble or water-swellable binder contained in the sheet and a water-soluble adhesive for bonding the sheet may be used. It is preferable to use similar substances as the binder and the water-soluble adhesive. When the same type of binder and water-soluble adhesive are used, the dissolution of both the binder and the water-soluble adhesive can be suppressed by the same kind of metal ions contained in the chemical solution.

As the binder, carboxymethylated pulp or carboxymethylcellulose-Na, polyvinyl alcohol, sodium alginate, starch and the like can be used. In this case, the same type of water-soluble adhesive is used.

The binder and the water-soluble adhesive are carboxymethylated pulp and carboxymethylcellulose-N
a or a combination of carboxymethyl cellulose-
In the case of Na, the chemical solution is CaCl ₂ , ZnSO ₄ , MgSO _4
At least one metal ion selected from ₄ is included. The binder and the adhesive cause a cross-linking complex with the metal ions, so that dissociation of sheets and dissociation of sheets are suppressed. When the sheet is flushed into a flush toilet, the metal ions are diluted with water, and the sheet is dissociated.

When the binder and the water-soluble adhesive are polyvinyl alcohol, Na ₂ SO ₄ , KCl, K
_At least one metal ion selected from ₂ SO ₄ is contained.
The binder and the water-soluble adhesive cause salting out by the metal ions, and dissolution in a chemical solution is suppressed.
For this reason, the strength and joining strength of the sheet can be increased.
Also in this case, when the metal ions flow into the flush toilet, the metal ions are diluted with water, so that the adhesion of the sheet is released and the sheet is hydrolyzed.

Next, in the method for manufacturing a bonded sheet according to the present invention, in the method for manufacturing a bonded sheet in which a plurality of sheets are partially bonded, an adhesive is applied to a surface of the fed sheet in a strip shape extending in the feeding direction. An adhesive application step to be performed, another sheet is superimposed on the adhesive application surface of the sheet, and the sheet is partially pressurized at intervals along the band-shaped application area of the adhesive. A pressure joining step of fixing the sheets with an adhesive to form a partial joint.

In the adhesive application step, a coater having a discharge slit is used, and in a state where the discharge slit is in contact with the sheet surface, the viscosity from the discharge slit to the sheet surface is 200 to 20,000 (cps; centipoise). It is preferable to apply and supply the adhesive of (3).

In the adhesive application step, since the discharge slit is in contact with the sheet surface, an adhesive having a relatively high viscosity can be reliably applied to the sheet surface. Further, since the adhesive having a high viscosity is applied in a strip shape, the adhesive does not spread more than necessary on the sheet surface, and the bonding strength between the sheets can be sufficiently secured at each joint.

In the pressure bonding step, an embossing roll having an embossment having a width larger than that of the adhesive band-like application region is used, and the embossing is used to partially separate the adhesive band-like application region at intervals. Preferably, the pressure is increased.

In this step, the band-shaped application region of the adhesive is surely pressed by the emboss.

Further, in the case of manufacturing a wet wiping sheet as a bonding sheet, a folding step of folding the bonded sheet after the pressure bonding step, and a chemical impregnation for impregnating a chemical liquid into each of the folded sheets. And a step are preferably provided.

Each sheet is impregnated with a chemical one by one.
Thereafter, the package is hermetically sealed, so that each sheet is surely impregnated with the chemical solution.

[0032]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a structure of a wiping sheet as an example of a bonding sheet of the present invention, FIG. 2A is a plan view of the wiping sheet, and FIG. 2B is a partially enlarged view of FIG. FIG. This wipe sheet 1
Is used for cleaning indoors such as toilets and kitchens, or for wiping towels, or as a towel, and is a non-water dissolvable wet sheet impregnated with a cleaning chemical, or after wiping off dirt. It is a water-disintegrable wet sheet that can be poured into a flush toilet or a dry sheet that is used in a dry state.

The wiping sheet 1 has a three-layer sandwich structure in which a second sheet S2 is interposed and joined between two first sheets S1. First sheet S1
Is obtained by subjecting a base paper sheet formed of pulp fiber or the like to wet papermaking by creping at a high creping rate, and the second sheet S2 is creped at a lower creping rate than the first sheet S1. Or not creped.

The adhesive joint A, which adhesively bonds the three sheets to each other, is formed linearly along the Y direction (row direction) with a certain interval in the X direction. In the adhesive bonding portion A, first sheets S1 and S1 positioned vertically,
The adhesive 2 is applied in a band shape to the mating surface with the intermediate second sheet S2. The strip-shaped application region of the adhesive 2 has a predetermined width dimension b in the X direction (CD; Cross Direction) and extends linearly along the sheet flow direction (MD) (Y direction). .

The application area of the adhesive 2 extending in the Y direction is pressurized at intervals at a constant pitch p. FIG.
In (A) and (B), the pressurized area is indicated by reference numeral 3.
The pressurized area 3 is formed by being pressurized and heated by the hot emboss 5a shown in FIG. 4A, and the individual pressurized areas 3 are formed in both the X direction and the Y direction. , Are formed inclined.

A portion (hatched portion) of the strip-shaped application region of the adhesive 2 which is pressurized and heated in the pressurizing region 3 is a short bonding portion a where the sheets are bonded and bonded.
It is. At the short joint a, the first sheet S1 and the second sheet S2 are firmly bonded to each other.
Further, in the application area (area indicated by c) of the adhesive 2 other than the pressure area 3, the adhesive strength between the sheets is extremely weak as compared with the short joint part a even if the sheets are not bonded or even if they are bonded. Has become.

When the sheets S1, S1 and S2 bonded and bonded at the bonding portion A are impregnated with a liquid such as a cleaning solution, fine wrinkles of the creping process of the first sheet S1 expand in the Y direction. Restores and produces elongation. At this time, since the first sheet S1 and the second sheet S2 are extremely firmly bonded at the short joint a, the second sheet S2 hardly expands in the Y direction at the short joint a. On the other hand, in the region c sandwiched between the short joints a and the short joints a, the sheets are not bonded, or even if they are bonded, the bonding strength is extremely weak. Occur. As a result, in the region sandwiched between the adhesive joints A and A, that is, in the region L between the rows formed by the short joints a, the valleys connecting the short joints a on both sides are formed in a belt shape. , And a band-like mountain portion connecting the region c appears. Therefore,
In the region of L sandwiched between the rows formed by the short joints a, the unevenness is repeated at a pitch substantially matching the arrangement pitch p of the short joints a, and wrinkles B are formed.

The appearance of the wrinkles B gives the whole wiping sheet 1 a sense of volume as shown in FIG.
The wrinkles B make it easier to grasp the wiping sheet by hand, and the wrinkles B make the sheet 1 uneven, so that the effect of wiping dirt can be enhanced.

In the case of forming a water-decomposable wet sheet, the first sheet S1 and the second sheet S2 are composed of natural pulp fibers (for example, 90% by weight) and carboxylmethylated pulp as a water-swellable binder. (10% by weight) and wet papermaking. As the adhesive 2 for joining the sheets, a water-soluble adhesive such as carboxymethylcellulose-Na is used. The chemical solution impregnated in the wiping sheet 1 includes CaCl ₂ , Zn
One or more metal ions selected from SO ₄ and MgSO ₄ are included. The binder and the water-soluble adhesive form a crosslinking complex with the metal ions. Therefore, the dissolution of the binder and the water-soluble adhesive in the chemical solution is suppressed, and the strength of the sheet at the time of wiping can be maintained. When the metal ions are flushed after use, the metal ions are diluted by a large amount of water, so that the adhesive bonding between the sheets at the short bonding portion a is dissociated, and the binder swells to dissociate the pulp fibers.

The first sheet S1 between the short joints a
In order to have a moderate bulge, the second sheet S2
The difference in elongation due to restoration of crepe wrinkles between the first sheet S1 and the first sheet S1 is preferably 20% or more and 80% or less, and more preferably 30% or more and 60% or less.
Also, if the basis weight of the first sheet S1 and the second sheet S2 is too large, the flexibility of the sheet is reduced, and the sheet is stiff and difficult to wipe off. There is a problem that the sheet is torn. Therefore, the basis weight of each of the first and second sheets is preferably 20 g / m ² or more and 100 g / m ² or less. When such a sheet is used, in the case of a two-layer structure of the first sheet and the second sheet, the total basis weight of the sheet is not less than 40 g / m ^{2 and not} more than 200 g / m ^2, and the front and back of the second sheet S2 In a three-layer structure sheet in which the first sheet S1 is bonded to both sides, the total weight is 60.
When it is not less than g / m ^{2, it is not} more than 300 g / m ² .

Next, a method of manufacturing the wiping sheet 1 as an example of the above-described bonding sheet will be described. FIG. 3 is a side view showing a manufacturing facility for the wiping sheet 1, and FIG.
FIGS. 2B and 2C are explanatory views of the manufacturing process, and the wiping sheet 1 corresponds to a cross-sectional view taken along line IV-IV in FIG. 2A. As shown in FIG. 3, the base paper webs 10b and 10c supply a first sheet S1 having a high crepe rate, and the base paper web 10a supplies a second sheet S2 having a low crepe rate or having no crepe. Is supplied.

In the adhesive application step I, the second sheet S2
The adhesive 2 is applied to both the front and back surfaces of the first sheet S1, that is, the mating surface with the first sheet S1. In the adhesive application step I, two coaters 11a and 11b are provided as a coating machine. In the coaters 11a and 11b, discharge slits 12a and 12b having a width dimension of substantially b are opened in a plurality of rows, and the discharge slits 12a and 12b are formed.
Are in contact with both front and back surfaces of the second sheet S2. In addition, the Y direction (MD) of the discharge slits 12a and 12b
Has a gap width of about 1 mm to 3 mm.

An adhesive such as carboxymethylcellulose-Na is supplied from a tank 13 to each of the coaters 11a and 11b by a metering pump 14 such as a gear pump.
By the metering pump 14, the adhesive is applied to the second sheet S
The adhesive is applied to the front and back surfaces of the second sheet S2 from the discharge slits 12a and 12b of each of the coaters 11a and 11b in accordance with the feed rate in the Y direction (MD) of No. 2. Here, the viscosity of the adhesive is 200 cps
(Centipoise) or more and relatively high viscosity of 20,000 cps or less are used. The viscosity was measured at 20 ° C. and 6 rpm using a B-type viscometer manufactured by Shibaura System Co., Ltd.
It was carried out under the following conditions. The discharge slit 12
Since a and 12b are in contact with the surface of the second sheet S2, a relatively high-viscosity adhesive can be uniformly applied to the second sheet S2. By using a relatively high-viscosity adhesive, the adhesive 2 applied to the second sheet S2 from the discharge slits 12a and 12b substantially matches the opening width of the discharge slits 12a and 12b.
(A) As shown in (B), it is applied in a strip shape and uniformly so as to have a width dimension b.

If the viscosity of the adhesive is less than 200 cps, the adhesive is diffused on the surface of the second sheet S2, and the adhesive 2 applied to the second sheet S2 is further diffused to the left and right than the width dimension b. It will be easier. On the other hand, if the viscosity is low, the adhesive easily penetrates into the inside of the sheet, and not only is the width too wide, but also it is not possible to form an adhesive layer necessary for strong adhesion on the sheet surface. The adhesive has a viscosity of 20,000 c.
If it exceeds ps, the adhesive cannot be uniformly applied to the sheet surface from the coaters 11a and 11b. Therefore, the viscosity of the adhesive is preferably 200 cps or more and 20,000 cps or less, more preferably 200 cps.
This is 10,000 cps or less. As described above, by bringing the coaters 11a and 11b into contact with the second sheet S2, an adhesive having a relatively high viscosity can be uniformly applied, and thus, in the completed bonding sheet, the bonding strength of the short bonding portion a is increased. In addition, the bonding strength at the individual short joints a can be made uniform.

In the example shown in FIG. 3, the coater 11a
And 11b are in contact with both surfaces of the second sheet S2, but these coaters may be in contact with the mating surface of the upper first sheet S1 and the mating surface of the lower sheet S1. . Further, the above-mentioned coater is a preferable example for applying a relatively high-viscosity adhesive with a constant width and uniformly, but it is also possible to use a means other than the coater, for example, a means such as gravure coating or flexo coating. It is possible.

After the adhesive 2 is applied to both sides of the second sheet S2 in the form of a strip, the three sheets are overlapped and bonded by pressure in the pressure bonding step II. In the pressure bonding step II, the heating roll 4 having a flat surface and the emboss 5a
The heating embossing roll 5 on which is formed is provided,
The three stacked sheets are sandwiched between the rolls 4 and 5, and are fed in the Y direction by rotation of the rolls. The pattern of the embossing 5a on the surface of the embossing roll 5 is shown in FIG.
(A) It is a convex part of substantially the same shape as the pressurization area 3 shown in (B).

The hot roll 4 and the hot emboss roll 5
Then, while the sheets S1, S1 and the sheet S2 are being heated, the embossing 5a presses the application area of the band-shaped adhesive 2 at intervals. As a result, as shown in FIG. 4B, the overlapping portion between the application region of the adhesive 2 and the pressing region 3 by the embossing 5a is heated and pressed to be firmly adhered, so that the short joint portion a is formed. It is formed. Further, in the area c of the adhesive application area where the embossment 5a does not contact, the sheets are not bonded, or even if they are bonded, the bonding strength is small.

The sheet having undergone the adhesive bonding step II is sent to a folding step III. In the folding machine 15 provided in the folding step III, the sheet after bonding is cut into a predetermined length,
It is folded in four or eight. The folded sheet is sent to the chemical liquid impregnation step IV. In the chemical liquid impregnation step IV, a chemical liquid is applied to each of the folded sheets by the application spray 16. Then, the sheet provided with the chemical solution is sealed and packaged. Because each sheet is impregnated with the chemical solution, when sealed and packaged,
The chemical liquid surely permeates the folded sheet. The chemical is a cleaning chemical in which water is mixed with alcohol, a surfactant, a preservative, a deodorant, an aromatic, and the like. In the case of a water-decomposable sheet, sheets S1 and S of metal ions are used.
2 and the adhesive 2 applied to the sheet S2
And a component that suppresses water hydrolysis.

When the cleaning liquid is impregnated into the adhesively bonded sheets as shown in FIG. 4C, the fine wrinkles of the crepe processing of the first sheet S1 expand in the Y direction. At this time, since the sheets S1 and S2 are firmly adhered and fixed at the short joint a, the elongation of the sheet is suppressed at the short joint a. Since the strength is weak, the elongation of the first sheet S1 is not suppressed. Therefore, in a region L sandwiched between the adhesive joints A, a valley connecting the short joints a and a peak connecting the regions c appear, and wrinkles B are formed. Note that the present invention is not limited to the above, and as shown in FIG. 5, a second sheet S2 which has been creped with a low elongation rate or has not been creped, and which has a high elongation rate. The creped first sheet S1 may be stacked one by one to form a two-layer structure.

[0050]

As described above, according to the present invention, the adhesive is applied in a strip shape when forming the partial adhesive joint, so that the adhesive applying step is simple. Also, the adhesive can be applied uniformly.

Further, since the adhesive portions to which the sheets are fixed are formed at intervals, the flexibility of the entire sheet can be ensured. Further, it is easy to form a pattern of a joint portion for forming uneven wrinkles as shown in FIGS.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall structure of a wiping sheet of the present invention;

FIG. 2A is an enlarged view of a part of FIG. 1, showing a plan view of a shape of an adhesive joint and a state of wrinkles caused by the shape of the adhesive joint;
Is a partially enlarged view of (A),

FIG. 3 is a side view showing a manufacturing apparatus for a bonding sheet according to the present invention;

FIGS. 4A, 4B, and 4C sequentially show a part of the manufacturing process of the wiping sheet of the present invention, and are sectional views taken along line IV-IV in FIG.

FIG. 5 is a cross-sectional view showing another configuration example of the laminated structure of the sheet;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wiping sheet 2 Adhesive 3 Pressing area 4 Heat roll 5 Emboss roll 11a, 11b Coater 12a, 12b Discharge slit 15 Folding machine 16 Chemical liquid application spray S1 First sheet S2 Second sheet A Adhesive joint a Short joint c Non-joined area p Short junction pitch

Claims (9)

[Claims] 1. A bonding sheet in which a plurality of sheets are partially bonded, wherein an adhesive is applied in a band shape to a mating surface of the sheets, and the sheets are spaced along the band-shaped application region of the adhesive. A bonding sheet, wherein the bonding sheet is partially pressurized, and the sheets are fixed with the adhesive in the pressing area to form a partial bonding portion. 2. The bonding sheet according to claim 1, wherein the width of the pressure region is larger than the width of the band-shaped application region of the adhesive. 3. The plurality of sheets to be joined are composed of one or more creped first sheets and a second sheet having a lower crepe rate or no crepe than the first sheets. 3. The joining sheet according to claim 1, wherein the crepe of the first sheet is restored, a bulge is formed between the joining portions, and the whole is made bulky. 4. The bonding sheet according to claim 1, wherein the sheet is a water-disintegrable sheet containing a water-soluble or water-swellable binder, and the adhesive is a water-soluble adhesive. 5. The bonding according to claim 4, wherein the binder and the water-soluble adhesive are made of the same substance, and the sheet is impregnated with a chemical solution for suppressing the dissolution of both the binder and the water-soluble adhesive. Sheet. 6. A method for manufacturing a joined sheet in which a plurality of sheets are partially joined, wherein an adhesive is applied to a surface of the sheet to be fed in a band shape extending in the sending direction; Another sheet is superimposed on the adhesive application surface, the sheet is partially pressed at intervals along the adhesive band-shaped application area, and the sheets are fixed with the adhesive in the pressure area. And a pressure bonding step of forming an effective bonding portion. 7. In the adhesive applying step, a coater having a discharge slit is used, and in a state where the discharge slit is in contact with the sheet surface, the viscosity from the discharge slit to the sheet surface is 200 to 20,000 (cps; The method for producing a bonding sheet according to claim 6, wherein an adhesive (centipoise) is supplied and applied. 8. In the pressure bonding step, an embossing roll having an embossment having a larger width than the band-shaped application region of the adhesive is used, and the band-shaped application region of the adhesive is partially spaced by the emboss. 8. The method according to claim 6, wherein
A method for producing the bonding sheet according to the above. 9. The method according to claim 6, further comprising, after the pressure bonding step, a folding step of folding the bonded sheets and a chemical liquid impregnating step of impregnating each of the folded sheets with a chemical liquid. A method for producing a bonding sheet according to any one of the above.