JP6061167B1 - LAMINATED PAPER AND METHOD FOR PRODUCING LAMINATED PAPER - Google Patents

Abstract

An object of the present invention is to provide a laminated paper that has high strength and is not easily torn even when an external force is applied from various directions including an external force applied in a direction orthogonal to a fiber direction in a state containing moisture. A laminated paper (1) has a first sanitary paper (2) containing fibers (6) arranged in one direction and a nonwoven fabric (3) laminated with the first sanitary paper (2) by heat fusion, and is used as a paper towel or a paper towel. used. And this laminated paper 1 is provided with the heat sealing | fusion part 4 formed with respect to the fiber 6 of the 1st sanitary paper 2 at an angle of 40 degree | times to 140 degree | times. [Selection] Figure 1

Description

  The present invention relates to a laminated paper, and more particularly to a laminated paper used for paper towels, paper towels, kitchen paper, cooking table sheets and the like that require a moisture absorption function, and a method for producing the laminated paper. .

Conventionally, laminated paper having a two-layer structure or a three-layer structure has been used for paper towels and paper towels.
Since the paper towel is used in a state including moisture, the paper towel is sealed in a bag after moisture is added to the laminated paper. On the other hand, a paper towel is used, for example, to wipe off water spilled on a table. This paper towel is stored in a state that does not contain moisture, and contains moisture by contacting an object to be wiped off during use.
Since paper towels and paper towels use thin laminated paper, these laminated papers have a problem that when they contain moisture, the strength is reduced, and they are torn when a large external force is applied.

In view of the above problems, a laminated paper that has high strength and is not easily torn in a state containing moisture has been proposed (for example, Patent Document 1).
In the laminated paper of Patent Document 1, crepe paper having a ridge extending in one direction is laminated on a heat-fusible sheet, and the crepe paper and the heat-fusible sheet are partially heat-sealed by a heat-sealing part. Yes. And this heat-fusion part is a broken-line shape which consists of many long points arranged at regular intervals in the direction orthogonal to the crease direction of the crepe paper, and is placed at regular intervals in the crease direction so as to be substantially parallel to each other. Several are arranged.
Moreover, in the heat fusion part adjacent to the heel direction, the intermediate part of the length direction of the non-fusion part between the long points of one heat fusion part is the length direction of the long point of the other heat fusion part. A plurality of heat-sealing portions are arranged at regular intervals in the heel direction so as to coincide with the intermediate portion, and the end portions in the length direction of the long points of the heat-sealing portions are the long points of the adjacent heat-sealing portions. It is formed so as to overlap with a predetermined length in the end portion in the length direction in a direction orthogonal to the heel direction.
Generally, the crepe paper ridge is formed in a direction orthogonal to the fiber direction in which the fibers constituting the crepe paper are arranged in the process of manufacturing the laminated paper. Therefore, the long point of the heat-sealing part of the laminated paper of Patent Document 1 is formed in the same direction as the fiber direction of the crepe paper.

In the laminated paper of Patent Document 1, a plurality of heat-sealing portions are arranged at regular intervals in the direction in which the crepe paper folds extend, so that when an external force is applied in the direction in which the crepe paper ridges extend, And the heat-sealing sheet are prevented from peeling off.
In addition, this laminated paper can increase the overall volume feeling when moisture is absorbed, so that the appearance can be improved.

Japanese Patent No. 3673488

Paper towels are used to wipe the hands and the face and mouth. Therefore, an external force is applied to the paper towel from various directions while containing moisture. On the other hand, when a paper towel is used, for example, to wipe off moisture on the table, the paper towel is rubbed many times with the paper towel. Therefore, external force is applied to the paper towel from various directions while containing moisture.
Therefore, the laminated paper used for paper towels and the like is required to have a property that it is strong against a force applied from various directions and is not easily torn in a state containing moisture.
As described above, in the laminated paper of Patent Document 1, since the long points of the heat-sealing portion are formed in the same direction with respect to the fiber direction of the laminated paper, the laminated paper has a direction orthogonal to the fiber direction. It is vulnerable to external forces applied to the surface and may be torn.
In addition, in the case of a two-layer laminated paper in which a non-woven fabric and a paper layer are laminated, the strength is further reduced when water is contained, compared to a two-layer laminated paper in which a paper layer and a paper layer are laminated. As a result, there is a problem that the product cannot be manufactured at an appropriate price. Therefore, it is desired to be able to manufacture a cheap and high-strength laminated paper.

  Therefore, an object of the present invention is to provide a laminated paper that has a high strength and is not easily torn even when an external force is applied from various directions including an external force applied in a direction orthogonal to the fiber direction in a state containing moisture. To do.

The laminated paper of the present invention has a first sanitary paper containing fibers arranged in one direction and a non-woven fabric laminated with the first sanitary paper by heat fusion , and is rectangular, and its long side is the first sanitary paper. The fiber is provided with a heat fusion part formed at an angle of 60 to 80 degrees or 100 to 120 degrees , and the heat fusion part is orthogonal to the fiber direction in which the fibers are arranged and the fiber direction. It is characterized by being formed plurally and independently in the intersecting direction .

  The laminated paper of the present invention is characterized in that the nonwoven fabric is a mesh sheet or a porous sheet. The laminated paper of the present invention is characterized in that the first sanitary paper is plain paper or crepe paper.

  The laminated paper of the present invention is characterized in that a second sanitary paper or an airlaid nonwoven fabric is laminated on the side opposite to the side on which the first sanitary paper is laminated. The laminated paper of the present invention is characterized in that the second sanitary paper is plain paper or crepe paper.

  The laminated paper of the present invention is characterized in that a pattern is applied to the first sanitary paper.

  The laminated paper of the present invention is used for paper towels or kitchen paper.

The method for producing a laminated paper of the present invention is to produce a laminated paper by a laminated paper producing apparatus having a lower roller facing the upper roller, and the upper roller is formed on the roller surface, and this Rectangle-shaped protrusions that are formed at an angle of 60 to 80 degrees or 100 to 120 degrees with respect to the circumferential direction of the roller surface, and are formed in a plurality and independently in the circumferential direction and the direction orthogonal to the circumferential direction. The laminated paper is manufactured by forming a heat-sealing portion when sandwiched between the upper roller and the lower roller.

In the laminated paper of the present invention, the heat fusion part is formed from 40 degrees to 140 with respect to the fiber direction of the first sanitary paper, and therefore the strength against external force applied from various directions is increased.
Therefore, even when a large external force is applied to the laminated paper, it can be used without tearing and can be applied to various usage modes.

  Since the non-woven fabric is laminated on one side, the laminated paper of the present invention can remove fine dust and fine dirt. Moreover, the touch is good by making one side into a nonwoven fabric, and a mouth and a face can be wiped gently. Further, since the nonwoven fabric swells when it contains moisture, wrinkles formed around the heat-sealed portion can be reduced, and a high-grade feeling can be given when used as a paper towel.

In addition, the laminated paper of the present invention is formed with a long side of 0 degrees with respect to the fiber direction, for example, by making the heat-sealing portion rectangular and the long side at the above angle (40 degrees to 140 degrees). Compared to the laminated paper, the area where the adjacent fibers in the direction orthogonal to the fiber direction are fused is increased.
Therefore, even when the area of the heat fusion part is small, the strength in the direction orthogonal to the fiber direction can be increased.

The laminated paper of the present invention can have a three-layer structure by laminating a second sanitary paper or air laid paper on the side opposite to the side on which the first sanitary paper is laminated. By making the laminated paper into a laminated paper having a three-layer structure, the strength can be increased as compared with the laminated paper having a two-layer structure.
Moreover, since the laminated paper of this invention can give a pattern to the 1st sanitary paper, the design property of laminated paper can be improved and a high-class feeling can be given to laminated paper.

  In addition, the present invention has a protrusion formed on the roller surface of the upper roller at 40 to 140 degrees with respect to the outer periphery of the upper roller, and when sandwiched between the upper roller and the lower roller, A method for producing a laminated paper for producing the above laminated paper is also provided by forming a fused portion.

It is a figure which shows the laminated paper which concerns on 1st embodiment of this invention. (A) sectional view, (b) plan view It is a figure for demonstrating angle (theta) in which a heat-fusion part is formed with respect to the fiber of the 1st sanitary paper which comprises the laminated paper which concerns on 1st embodiment of this invention. (A) θ: 60 degrees, (b) θ: 90 degrees, (c) θ: 120 degrees It is a figure which shows the various arrangement | sequence of the heat-fusion part formed in the laminated paper which concerns on 1st embodiment of this invention. It is a figure which shows the various arrangement | sequence of the heat-fusion part formed in the laminated paper which concerns on 1st embodiment of this invention. It is a figure for demonstrating the shape of the heat sealing | fusion part of the laminated paper which concerns on 1st embodiment of this invention. (A) oval, (b) isosceles triangle, (c) rhombus It is a figure which shows the arrangement | sequence of the heat-fusion part formed in the laminated paper which concerns on 1st embodiment of this invention. (A) elliptical heat-sealed portion, (b) linear heat-sealed portion It is the figure which showed a part of manufacturing apparatus of the laminated paper which concerns on 1st embodiment of this invention. The upper part shows a side view of the manufacturing apparatus, and the lower part shows a front view of the manufacturing apparatus. (A) Manufacturing apparatus in which upper and lower protrusions are formed in the same arrangement (b) Manufacturing apparatus in which upper and lower protrusions are arranged to mesh with each other (c) Only upper protrusion is formed Manufacturing equipment It is sectional drawing of the laminated paper which concerns on 2nd embodiment of this invention.

[First embodiment]
The laminated paper 1 according to the present embodiment will be described with reference to FIGS.
The laminated paper 1 is composed of a plurality of layers, and is used for, for example, paper towels and kitchen paper.
As shown in FIG. 1A, the laminated paper 1 has a first sanitary paper 2 including fibers 6 arranged in one direction, and a nonwoven fabric 3 laminated on one side of the first sanitary paper 2. As shown in FIG. 1B, the first sanitary paper 2 and the nonwoven fabric 3 have a predetermined direction with respect to the direction X in which the fibers 6 of the first sanitary paper 2 are arranged (hereinafter referred to as the fiber direction X). It is fused by a plurality of thermal fusion parts 4 formed at an angle θ.

[First sanitary paper 2]
The first sanitary paper 2 has water absorbency, and the fibers 6 constituting the first sanitary paper 2 are arranged in a certain direction. For the first sanitary paper 2, for example, plain paper or crepe paper having wrinkles in a direction Y that intersects perpendicularly with the fiber direction X (hereinafter referred to as the intersecting direction Y) can be used.
The first sanitary paper 2 can be mixed with a heat-fusible fiber or a heat-fusible agent.
In addition, the thickness of the 1st sanitary paper 2 can be suitably changed according to a use and the objective.

[Nonwoven fabric 3]
As the nonwoven fabric 3, a mesh sheet or a porous sheet can be used. As the non-woven fabric 3, one in which thermoplastic resin fibers having a low melting point are mixed on the surface of the non-woven fabric 3 or one composed entirely of thermoplastic resin fibers having a low melting point is used. For example, polyester can be used as the thermoplastic resin fiber. Moreover, the nonwoven fabric 3 preferably has a sponge property.
The mesh sheet refers to a sheet in which pores are regularly arranged, and the porous sheet refers to a sheet in which pores are formed randomly.

[Heat fusion part 4]
The heat sealing | fusion part 4 is rectangular shape, and when the 1st sanitary paper 2 and the nonwoven fabric 3 are melt | fused, two or more are formed partially (FIG.1 (b)). The heat fusion parts 4 are formed at regular intervals with respect to the fiber direction X and the cross direction Y.
The angle θ is an angle formed by one long side 5 (left side in FIG. 2) of the heat-sealing portion 4 with respect to the fiber 6. For example, FIG. In this example, the long side 5 and the fiber 6 are formed with an angle θ of 60 degrees.
FIG. 2B shows an example in which the angle θ is 90 degrees and the heat fusion part 4 is formed, and FIG. 2C shows the angle θ of 120 degrees and the heat fusion part 4 is formed. Each example is shown.
The angle θ is preferably 40 to 140 degrees, more preferably 40 to 50 degrees or 130 to 140 degrees, and most preferably 60 to 80 degrees or 100 to 120 degrees.
In FIG. 2, the angle θ formed between the long side 5 on the left side of the heat-fused portion 4 and the fiber 6 has been described. However, the angle formed between the long side 5 on the right side of the heat-fused portion 4 and the fiber 6 is defined as an angle θ. Also good.

The heat fusion part 4 can be formed with the arrangement | sequence shown in FIG. 3 and FIG. 4, for example.
For example, in the laminated paper 1, the heat fusion part 4 can be formed at a constant interval in the fiber direction X and the crossing direction Y with the same angle θ (FIG. 3A). The heat fusion portions 4 in the row in the fiber direction X and the heat fusion portions formed in the cross direction Y are adjacent to each other.
Further, in the laminated paper 1, the heat fusion part 4 is formed by shifting the heat fusion part 4 in the cross direction Y of the lamination paper 1 shown in FIG. (FIG. 3B). In this case, in the cross direction Y, the heat fusion part 4 is necessarily formed.
Further, in the heat-sealing portion 4 of the laminated paper 1, the angle θ of the heat-sealing portion 4 adjacent in the fiber direction X is the same, and the angle θ of the heat-sealing portion 4 adjacent in the cross direction Y may be changed. (FIG. 3C).

Further, in the laminated paper 1, the heat-sealed portion 4 having an angle θ of 40 degrees to 140 degrees and a heat-sealed portion not satisfying the angle (40 degrees to 140 degrees) can be formed in combination ( FIG. 4 (a)).
Furthermore, in the laminated paper 1, the area of the heat-sealing part 4 can be changed suitably (FIG.4 (b)). In the laminated paper 1, for example, in the fiber direction X, a heat-sealed portion 4 having a certain area and a heat-fused portion 4 having a smaller area than the fused portion 4 are alternately formed. Similarly, in the crossing direction Y, the area of the adjacent heat-sealed portions 4 can be changed.

The shape of the heat sealing | fusion part 4 is not limited to a rectangle, For example, as shown in FIG. 5, it can be set as arbitrary shapes, such as an ellipse, an isosceles triangle, and a rhombus. When forming the heat fusion part 4 of these shapes, as shown in FIGS. 5 (a) to 5 (c), the longest straight line passing through the center of gravity of the heat fusion part 4 of each shape (hereinafter, imaginary line). L)) is regarded as a long side, and is defined as an angle θ formed by the virtual line L and the fiber S6.
In the case where the elliptical heat-sealed portion 4 is formed, for example, as shown in FIG. 6A, the heat-fused portions 4 can be arranged. Further, as shown in FIG. 6 (b), the heat fusion part 4 can also be arranged in a mesh shape in which straight lines are combined.

Next, a method for manufacturing the laminated paper 1 will be described with reference to FIG.
The laminated paper 1 according to the present embodiment can be manufactured by a laminated paper manufacturing apparatus including the heat seal unit 10 shown in FIG. The heat seal unit 10 includes an upper roller 11 and a lower roller 12 facing the upper roller 11. An upper protrusion 13 is formed on the roller surface 11 </ b> A of the upper roller 11. The upper protrusion 13 is rectangular, and the long side of the upper protrusion 13 is formed at an angle of 40 to 140 with respect to the circumferential direction of the upper roller 11.
Between the upper roller 11 and the lower roller 12, the first sanitary paper 2 and the nonwoven fabric 3 are stacked and inserted, and heat is applied from the upper roller 11 and the lower roller 12, so that the first sanitary paper 2 and The nonwoven fabric 3 is partially heat-sealed to form a heat-sealed portion 4.
The heat-sealed laminated paper 1 is taken up by a take-up roller (not shown) and rolled.

For the heat seal part 10, for example, the heat seal part 10A to the heat seal part 10C shown in FIG. 7 can be used.
In the heat seal portion 10A, a plurality of rectangular upper protrusions 13 are formed on the roller surface 11A of the upper roller 11 and a plurality of rectangular lower protrusions 14 are formed on the roller surface 12A of the lower roller 12 (FIG. 7 ( a)). The upper protrusion 13 and the lower protrusion 14 are designed to have the same shape, and the intervals at which the upper protrusion 13 and the lower protrusion 14 are provided are the same in the circumferential direction. In this heat seal part 10A, the upper protrusion part 13 and the lower protrusion part 14 sandwich the first sanitary paper 2 and the nonwoven fabric 3 from above and below, so that a plurality of heat fusion parts 4 are formed. The long side of the lower protrusion 14 is also formed at an angle of 40 to 140 with respect to the circumferential direction of the lower roller 12.
In the heat seal part 10B, a plurality of upper protrusions 13 and a plurality of lower protrusions 14 are formed on the upper roller 11 and the lower roller 12 at predetermined intervals (FIG. 7B).
In the heat seal portion 10B, the upper protrusion 13 formed on the roller surface 11A and the lower protrusion 14 formed on the roller surface 12A sandwich the first sanitary paper 2 and the nonwoven fabric 3 from above and below like a gear. A plurality of heat fusion parts 4 are formed.
In the heat seal portion 10C, the upper protrusion 13 is formed only on the roller surface 11A of the upper roller 11 (FIG. 7C). In the heat seal portion 10 </ b> C, the upper protrusion 13 presses the first sanitary paper 2 and the nonwoven fabric 3 against the lower roller 12, thereby forming a plurality of heat fusion portions 4.
The upper protrusion 13 and the lower protrusion 14 are formed continuously in the circumferential direction of the rollers 11 and 12, respectively.

  In the heat seal part 10, the angle θ of the heat fusion part 4 with respect to the fiber direction X can be changed by changing the angle at which the upper protrusion part 13 and the lower protrusion part 14 are formed. Further, the upper roller 11 can be provided with engraving portions such as desired patterns, characters and logos in addition to the upper protrusions 13. When this engraving part is pressed against the first sanitary paper 2, the first sanitary paper 2 can be provided with a pattern, characters and a logo, the design can be improved, and the laminated paper 1 can be given a high-class feeling.

In this embodiment, a laminated paper 1 having a two-layer structure of a first sanitary paper 2 and a nonwoven fabric 3 was produced.
As the first sanitary paper 2, plain paper or crepe paper was used. A crepe paper having a plurality of wrinkles formed in the cross direction Y was used. Moreover, the nonwoven fabric 3 used the mesh sheet | seat or the porous sheet, respectively.
The heat fusion part 4 was formed in the arrangement | sequence shown to FIG. 3 (a) and FIG.3 (b) at the fixed space | interval in the fiber direction X and the cross direction Y, respectively.

[Strength test]
When an external force is applied to the laminated paper 1 containing moisture from the cross direction Y or a direction oblique to the cross direction Y shown in FIG. 1B (hereinafter referred to as a slant direction Z). The strength (hardness to tear) was examined.
In the strength test, both ends of the laminated paper 1 were sandwiched, and a predetermined external force was applied in the intersecting direction Y and the oblique direction Z. The predetermined external force was a force required when the laminated paper 1 formed by the heat fusion part 4 at 0 degrees (180 degrees) with respect to the fiber direction X was torn.
In the strength evaluation, after applying an external force to the laminated paper 1, whether the tear was generated in the laminated paper 1 was visually observed. The criteria for strength evaluation were as follows.
A: Hard to break (no tear)
○: Slightly difficult to tear (with some minor tears)
Δ: Slightly easy to tear (some major tears)
La: easy to tear

Results of strength evaluation of the laminated paper 1 in which plain paper or crepe paper is used for the first sanitary paper 2, mesh sheets are used for the nonwoven fabric 3, and the heat-sealed portions 4 are formed in the arrangement shown in FIG. Is shown in Table 1.
In the laminated paper 1 using plain paper as the first sanitary paper 2, it was found that the strength of the laminated paper 1 was large when the angle θ of the heat-sealing part 4 was formed from 40 degrees to 140 degrees (Table 1: Example 1 to Example 11).
With respect to the tensile force from the cross direction Y, no tear was observed in the laminated paper 1 formed with the angle θ of the heat-sealed portion 4 of 60 degrees to 80 degrees and 100 degrees to 120 degrees.
On the other hand, with respect to the tensile force in the oblique direction Z, no tears were observed in the laminated paper 1 formed with the angle θ of the heat-sealed portion 4 of 40 to 80 degrees and 100 to 140 degrees.
From these results, when the heat-sealed portion 4 is formed at an angle θ of 60 degrees to 80 degrees, 100 degrees to 120 degrees, the laminated paper 1 is subjected to a tensile force from the cross direction Y and the oblique direction Z. It was found to show a large strength.
Further, the strength of the laminated paper 1 with respect to the angle θ forming the heat-sealing part 4 was the same even when crepe paper was used for the first sanitary paper 2 (Table 1: Examples 12 to 22). .

On the other hand, it was found that in the laminated paper 1 formed with the angle θ of the heat-sealed portion 4 from 0 degrees to 30 degrees and from 150 degrees to 180 degrees, a large tear occurs or the laminated paper 1 is completely torn ( Table 1: Comparative Example 1 to Comparative Example 10).
Further, it was found that when the mesh sheets were laminated and the angle θ of the heat-sealing part 4 was formed at 70 degrees or 90 degrees, it was completely torn (Table 1: Comparative Example 11 and Comparative Example 12). ).
In addition, the result of the strength test of the laminated paper 1 in which the heat fusion part 4 is formed in the arrangement shown in FIG. 3B is the result of the laminated paper in which the heat fusion part 4 is formed in the arrangement shown in FIG. The result was the same as 1.

A plain paper or crepe paper is used for the first sanitary paper 2, a porous sheet is used for the nonwoven fabric 3, and the strength evaluation of the laminated paper 1 in which the heat-sealing portions 4 are formed in the arrangement shown in FIG. The results are shown in Table 2.
The strength of the laminated paper 1 when a porous sheet is used for the nonwoven fabric 3 shows almost the same result as when a mesh sheet is used for the nonwoven fabric 3, and the angle θ of the heat-sealed portion 4 is formed from 40 degrees to 140 degrees. It was found that the strength was high (Table 2: Example 1 to Example 22).
With respect to the pulling force in the cross direction Y, no tear is observed in the laminated paper 1 formed with the angle θ of the heat-sealing part 4 of 60 degrees to 80 degrees and 100 degrees to 120 degrees, while the pulling force in the oblique direction Z is With respect to No. 1, no tears were observed in the laminated paper 1 formed with the angle θ of the heat-sealed portion 4 of 40 degrees to 70 degrees and 110 degrees to 140 degrees.
From these results, even when a porous sheet is used for the nonwoven fabric 3, the laminated paper in which the angle θ is 60 ° to 80 °, 100 ° to 120 °, and the heat-sealed portion 4 is formed has a cross direction Y and an oblique direction. It was found that the tensile strength from the direction Z is large.
Further, when the heat-sealed portion 4 is formed at an angle θ of 0 degrees to 30 degrees and 150 degrees to 180 degrees, a large tear occurs in the laminated paper 1 using plain paper or crepe paper as the first sanitary paper 2. It was found that the laminated paper 1 was completely torn. It was found that the laminated sheets in which the heat-sealed portions 4 were formed at an angle θ of 70 degrees or 90 degrees between the porous sheets were completely torn (Table 2: Comparative Example 11 and Comparative Example 12). .
In addition, the result of the strength test of the laminated paper 1 in which the heat fusion part 4 is formed in the arrangement shown in FIG. 3B is the result of the laminated paper in which the heat fusion part 4 is formed in the arrangement shown in FIG. The result was the same as 1.

Next, the effect of the laminated paper 1 in the present embodiment will be described.
In the laminated paper 1 according to the present embodiment, the angle θ of the heat-sealing part 4 is formed from 40 degrees to 140 degrees, so that an external force can be applied from the cross direction Y or the oblique direction Z in a state containing moisture. , Hard to tear.
Therefore, the laminated paper 1 can maintain its function even when an external force is applied from various directions, can widen the working range in which the laminated paper 1 is used, and can be used in various ways of using paper towels and paper towels. Applicable.

  Moreover, since the single side | surface of the laminated paper 1 in this embodiment is the nonwoven fabric 3, a fine dust is entangled in the ultrafine fiber of the nonwoven fabric 3. Therefore, when the laminated paper 1 is used as a paper towel, fine dust can be wiped off on the surface of the nonwoven fabric 3. Further, even when the laminated paper 1 is used as a paper towel, fine dust adhering to the hand can be removed.

Since the heat-sealing part 4 of the laminated paper 1 is formed by compression, wrinkles are generated around the heat-sealing part 4 of the first sanitary paper 2. Since the laminated paper 1 is composed of the nonwoven fabric 3 on one side, the nonwoven fabric 3 swells and the volume of the nonwoven fabric 3 increases when it contains moisture. When it does so, the wrinkles which arose on the 1st sanitary paper 2 will be extended | stretched for the part which the volume of the nonwoven fabric 3 increased.
Therefore, the laminated paper 1 can be used as a paper towel with less wrinkles.

  Further, the laminated paper 1 may be used not only for wiping hands as a paper towel but also for wiping the face and mouth. Since the laminated paper 1 is composed of the nonwoven fabric 3 on one side, the face and mouth can be wiped with the soft feel of the nonwoven fabric 3, and the face and mouth can be wiped with a soft touch to infants and the elderly.

In the laminated paper 1 according to the present embodiment, the heat fusion part 4 (small design pattern line) is formed at 40 degrees to 140 degrees with respect to the fiber direction X. Uncreased crepe wrinkles in the non-heat-sealed portion are fused and divided by the nonwoven fabric, and the swelling function due to heating is lost. Therefore, since the swelling rate of the soot when it contains water becomes extremely small, the function and wiping feeling of the paper towel do not change whether it is plain paper or crepe paper.
The laminated paper 1 is not limited to base paper such as plain paper, crepe paper, single or double, and is selected from mass-produced base paper, so that it is highly useful from the viewpoint of cost of product cost.
Furthermore, the laminated paper 1 composed of two layers can reduce the cost of materials compared to the laminated paper composed of three layers, save processing time, and simplify equipment. It can be greatly reduced. Therefore, it is possible to provide a good and inexpensive product to a wide consumer group.

As described above, the case where the laminated paper 1 is used for a paper towel or a paper towel has been described. However, the laminated paper 1 requires a water absorption function such as a cooking table sheet, a paper towel, kitchen paper, etc. Can be used for
Although the required strength of the laminated paper 1 varies depending on the application, it is possible to design a laminated paper having a desired strength by appropriately changing the forming angle, the area, and the number of the heat-bonded portions 4 with respect to the fiber direction X .

[Second Embodiment]
In this embodiment, as shown in FIG. 8, in the laminated paper 1 produced in the first embodiment, the second sanitary paper 7 is provided on the surface opposite to the surface on which the first sanitary paper 2 is laminated with respect to the nonwoven fabric 3. Or it has the airlaid nonwoven fabric 8, and is comprised by the 3 layer structure.
This laminated paper 1 can be manufactured by the laminated paper manufacturing apparatus provided with the heat seal portions 10A to 10C shown in the first embodiment.

[Example]
In this example, a laminated paper 1 having a three-layer structure was produced and its strength was evaluated.
As the second sanitary paper 7, the plain paper and the crepe paper used in the first embodiment were used.
The strength evaluation is performed by the same method as in the first embodiment, and the notation of the strength evaluation result is also shown.

First, the results of the strength evaluation of the laminated paper 1 using plain paper or crepe paper for the first sanitary paper 2, mesh sheet for the nonwoven fabric 3, and plain paper or crepe paper for the second sanitary paper 7 are shown. 3 shows.
It was found that the laminated paper 1 using plain paper for the first sanitary paper 2 and plain paper for the second sanitary paper 7 has high strength when the angle θ of the heat-sealing part 4 is formed from 40 degrees to 140 degrees ( Table 3: Example 1 to Example 11).
With respect to the tensile force in the cross direction Y, no tears were observed in the laminated paper 1 formed with the angle θ of the heat-sealed portion 4 being 50 to 80 degrees and 100 to 130 degrees.
On the other hand, with respect to the pulling force in the oblique direction Z, no tears were observed in the laminated paper 1 formed with the angle θ of the heat-sealed portion 4 of 40 degrees to 70 degrees and 110 degrees to 140 degrees.
From these results, when the heat-sealed part 4 is formed at an angle θ of 50 degrees to 80 degrees and 100 degrees to 130 degrees, the laminated paper 1 has a tensile force from the cross direction Y and the oblique direction Z. , It was found to show great strength.
Further, the strength of the laminated paper 1 with respect to the angle θ of the heat-sealing portion 4 is as follows. When the crepe paper is used for the first sanitary paper 2 and the crepe is used for the second sanitary paper 7, the plain paper and the second sanitary paper are used for the first sanitary paper 2. The same result was obtained when crepe paper was used for No. 7 (Table 3: Example 12 to Example 33).

On the other hand, when the angle θ of the heat-sealing part 4 is formed from 15 degrees to 30 degrees and from 150 degrees to 165 degrees, the laminated paper 1 may be severely broken or the laminated paper 1 may be completely torn. (Table 3: Comparative Example 1 to Comparative Example 12).
In addition, the result of the strength test of the laminated paper 1 in which the heat fusion part 4 is formed in the arrangement shown in FIG. 3B is the result of the laminated paper in which the heat fusion part 4 is formed in the arrangement shown in FIG. The result was the same as 1.

Next, Table 4 shows the results of strength evaluation of the laminated paper 1 using the airlaid nonwoven fabric 8 as the second sanitary paper 7.
It was found that the laminated paper 1 using the airlaid nonwoven fabric 8 has a high strength when the angle θ of the heat-sealing part 4 is formed from 40 degrees to 140 degrees (Table 4: Examples 1 to 11). ).
Regarding the tensile force with respect to the cross direction Y, no tears were observed in the laminated paper 1 formed with the angle θ of the heat-sealing portion 4 of 60 to 80 degrees and 100 to 120 degrees.
On the other hand, with respect to the tensile force in the oblique direction Z, no tears were observed in the laminated paper 1 formed with the angle θ of the heat-sealing part 4 of 40 to 80 degrees and 100 to 140 degrees.
From these results, when the angle θ of the heat-sealed portion 4 is formed from 60 degrees to 80 degrees and from 100 degrees to 120 degrees, it shows a high strength against the tensile force from the cross direction Y and the oblique direction Z. I understood.
Further, the strength of the laminated paper 1 with respect to the angle θ forming the heat-sealing portion 4 showed the same tendency when crepe paper was used for the first sanitary paper 2 (Table 4: Examples 12 to 22). ).
In addition, the strength result of the laminated paper 1 in which the heat fusion part 4 is formed in the arrangement shown in FIG. 3B is the same as that of the laminated paper 1 in which the heat fusion part 4 is formed in the arrangement shown in FIG. The same result.

Next, the effect of the laminated paper 1 in the present embodiment will be described.
When plain paper or crepe paper is used for the second sanitary paper 7, the strength increases even if the laminated paper 1 contains moisture. Therefore, even when a large external force is applied to the laminated paper 1 in a state containing water from various directions, it is difficult to shake. Further, the laminated paper having a three-layer structure has a higher strength than the laminated paper having a two-layer structure, and can maintain the function even when an external force is applied from various directions.
Further, since the nonwoven fabric 3 is laminated between plain paper and crepe paper, a soft feel can be obtained when the laminated paper 1 is used, and a high-class feeling can be given to the laminated paper 1.
On the other hand, when the airlaid nonwoven fabric 8 is used for the second sanitary paper 7, the laminated paper 1 can be given a softer and softer feeling.

Although the present embodiment has been described above, the configuration described in the above embodiment can be selected or changed to other configurations as appropriate without departing from the gist of the present invention. .
In the present embodiment, the laminated paper 1 composed of two layers or three layers has been described. However, if the first sanitary paper 2 and the nonwoven fabric 3 are fused by the heat fusion part 4 at a predetermined angle, the laminated paper 1 is laminated. The number of layers is not limited.
In addition, the first sanitary paper 2 may be formed of a plurality of fiber layers other than those in which the fibers are arranged in only one direction, and each fiber layer is formed to intersect. In this case, the angle θ of the heat-sealing portion 4 can be determined by regarding the direction in which the uppermost fibers are arranged as the fiber direction X or the direction in which the most fibers are arranged as the fiber direction X.
Furthermore, by changing the area of the heat fusion part 4, the areas of the heat fusion part 4 and the non-heat fusion part can be changed, the generation rate of wrinkles can be changed, and an aesthetic value can be imparted.
Further, in the present embodiment, an example in which the regularly arranged heat fusion portions 4 are formed is shown, but the same effect can be obtained even if the heat fusion portions 4 are irregularly (randomly) formed. Occurs.

DESCRIPTION OF SYMBOLS 1 Laminated paper 2 First sanitary paper 3 Non-woven fabric 4 Thermal fusion part 5 Long side 6 Fiber 7 Second sanitary paper 8 Air-laid non-woven fabric 10 Heat seal part 11 Upper roller 11A Roller surface 12 Lower roller 12A Roller surface 13 Upper protrusion 14 Below Side projection X Fiber direction Y Cross direction Z Diagonal direction

Claims (8)

A laminated paper having a first sanitary paper containing fibers arranged in one direction and a nonwoven fabric laminated with the first sanitary paper by heat fusion,
It has a rectangular shape, and the long side thereof is provided with a heat-sealed portion formed at an angle of 60 to 80 degrees or 100 to 120 degrees with respect to the fibers of the first sanitary paper ,
The heat fusion part is formed in a plurality and independently in a fiber direction in which the fibers are arranged and a cross direction perpendicular to the fiber direction.
Laminated paper characterized by that. The nonwoven fabric is a mesh sheet or a porous sheet,
The laminated paper according to claim 1. The first sanitary paper is plain paper or crepe paper,
The laminated paper according to claim 1 or 2, characterized by the above. For the nonwoven fabric, on the side opposite to the side on which the first sanitary paper is laminated,
Second sanitary paper, or airlaid nonwoven fabric is laminated,
The laminated paper according to any one of claims 1 to 3, characterized in that: The second sanitary paper is plain paper or crepe paper,
The laminated paper according to claim 4 . A pattern is given to the first sanitary paper,
The laminated paper according to any one of claims 1 to 5, characterized in that: Used for paper towels or paper towels,
The laminated paper according to any one of claims 1 to 6, characterized in that: In the laminated paper manufacturing method for manufacturing the laminated paper by the laminated paper manufacturing apparatus provided with the lower roller facing the upper roller,
The upper roller is formed on the roller surface and formed at an angle of 60 degrees to 80 degrees or 100 degrees to 120 degrees with respect to the circumferential direction of the roller surface, and in a circumferential direction and a direction perpendicular to the circumferential direction. A plurality of and independently formed rectangular protrusions,
The laminated paper according to any one of claims 1 to 7 is manufactured by forming the thermal fusion portion when sandwiched between the upper roller and the lower roller.
A method for producing a laminated paper.