JP5641758B2 - Kitchen paper - Google Patents

Description

  The present invention relates to a kitchen paper used for a cleaning application and a food touching application.

  Kitchen paper is used for cleaning the kitchen, cleaning utensils, etc., food packaging, boiled drop lids, drip absorbents such as fresh fish, water drainers, oil sachets, and fried foods. Although it is used for various purposes such as direct contact, liquid absorption and hygienic safety are required.

  Conventionally, as a configuration of kitchen paper, an appropriate number of sheets made of embossed crepe paper are laminated and formed as a liquid absorption mechanism mainly due to a capillary phenomenon due to a gap between sheet fibers in a gap between embosses of each sheet. Known are those configured to take in and hold moisture, oil, and the like, and those formed only from a nonwoven fabric sheet, in which moisture, oil, etc. are taken in and held in the gaps between the nonwoven fabric fibers.

  However, the kitchen paper made of these conventional crepe paper and the kitchen paper made of non-woven sheet are clearly suitable and unsuitable for the use due to the nature of each sheet. Has drawbacks.

  For example, crepe paper is dense between fibers and oriented in the MD direction in the plane direction, and the valley of the crepe extends in the CD direction, so water / oil absorption in the plane direction is faster compared to the nonwoven sheet, Absorption and transmission in the Z-axis direction are slow due to high density. In wiping, dust and dirt can be entangled by crepe peaks and valleys, but the cushioning property is inferior.

On the other hand, the kitchen paper consisting only of the nonwoven fabric sheet is easy to permeate although it has a very high liquid absorption speed due to the coarse fiber density and the large number of voids between the fibers due to the manufacturing method of the nonwoven sheet. The liquid retainability is extremely inferior to that of kitchen paper laminated with crepe paper. Due to this property, the crepe in which the fibers are strongly oriented in a certain direction also in terms of diffusibility within the liquid sheet. Inferior to paper. Further, since the fiber density is coarse as described above, the impression of the smoothness of the surface has a feeling of friction as compared with crepe paper, and is suitable for wiping off sticky dirt.
Here, the present applicant has developed a kitchen paper in which a non-embossed nonwoven sheet and an embossed crepe paper are laminated (Patent Document 2 below).

  However, this kitchen paper has the functions of a nonwoven fabric sheet and crepe paper on each side, and it is excellent, but the bonded part by the adhesive hinders absorption and permeation of water and oil, and does not necessarily function as a base material. It was not something that was fully utilized. Moreover, when taking the structure which adhere | attaches the nonwoven fabric sheet with a coarse fiber density, and a crepe paper through the adhesive agent provided to the embossing convex part, the adhesive agent is absorbed by the nonwoven fabric, and both are insufficiently bonded. The sheet tends to become hard due to the application of the adhesive.

JP2008-208501 JP2008-137241 JP 2005-288774 A

  Therefore, the present invention has a function of a nonwoven sheet and crepe paper, and bonds them in such a manner that the bonded portion does not hinder the absorption and permeation of water and oil, and makes more effective use of the characteristics of both sheets. It is another object of the present invention to provide a kitchen paper that exhibits the above-described effects and does not have the sheet hardness and insufficient adhesion due to the adhesive.

The present invention and effects obtained by solving the above problems are as follows.
<Invention of Claim 1>
It has a ply structure in which crepe paper and a nonwoven fabric sheet by the airlaid method are laminated,
The ply structure is laminated and integrated with a needle punch that punches from the front side to the back side and a needle punch that punches from the back side to the front side. paper.
<Invention of Claim 2>
The kitchen paper according to claim 1, wherein only a linear needle punch along the MD direction of the crepe paper is applied.

<Invention of Claim 3 >
It has a ply structure in which crepe paper and a nonwoven fabric sheet by the airlaid method are laminated,
A kitchen paper, wherein the ply structure is laminated and integrated by a needle punch, and only a linear needle punch along the MD direction of the crepe paper is applied.
<Invention of Claim 4 >
The crepe paper is provided with 5.0 to 40% of micro embossing with an embossed area of 0.04 to 1.0 mm ² and an embossed depth of 0.1 to 1.0 mm based on the area of one side of the kitchen paper. And the kitchen paper of any one of Claims 1-3 in which the micro embossing is not provided to the nonwoven fabric sheet.

<Invention of Claim 5 >
It has a ply structure in which crepe paper and a nonwoven fabric sheet by the airlaid method are laminated,
Lamination integration with the ply structure is done by needle punch,
The crepe paper is provided with 5.0 to 40% of micro embossing with an embossed area of 0.04 to 1.0 mm ² and an embossed depth of 0.1 to 1.0 mm based on the area of one side of the kitchen paper. Kitchen paper characterized in that the nonwoven fabric sheet is not provided with microembossing.
<Invention of Claim 6>
The nonwoven fabric sheet is a kitchen paper according to any one of claims 1 to 5, comprising 40% or more of pulp fibers having a fiber length of 1.0 to 12.0 mm.

<Invention of Claim 7 >
It has a ply structure in which crepe paper and a nonwoven fabric sheet by the airlaid method are laminated,
Lamination integration with the ply structure is done by needle punch ,
A kitchen paper, wherein the nonwoven fabric sheet contains 40% or more of pulp fibers having a fiber length of 1.0 to 12.0 mm.

<Invention of Claim 8 >
The kitchen paper according to any one of claims 1 to 7, wherein the laminated sheets are not adhered by an adhesive.

<Invention of Claim 9 >
The crepe paper and the nonwoven fabric sheet have a two-layer structure of each layer, or the front and back layers are crepe paper, and the intermediate layer positioned between the front and back layers is a nonwoven fabric sheet. Kitchen paper of any one of -8.

<Invention of Claim 10 >
The kitchen paper according to any one of claims 1 to 9, wherein a needle punch is linearly provided along the edge of the kitchen paper.

<Invention of Claim 11 >
The needle punches punched from the front surface side toward the back surface side and the needle punches punched from the back surface side toward the front surface side are arranged in parallel so as to be alternately or regularly arranged to form a line. Kitchen paper given in any 1 paragraph .

<Invention of Claim 12 >
The embossed top area is 1.75 to 9.0 mm ² and the embossed depth is 0.9 to 1.5 mm on the crepe paper and the airlaid nonwoven fabric sheet. Kitchen paper as described in

  As described above, according to the present invention, the non-woven sheet and the crepe paper have functions, and the bonded portions are bonded in a manner that does not prevent the absorption and permeation of water and oil, and the characteristics of both sheets are utilized more effectively. There is provided a kitchen paper that exhibits an effect due to an organic action and that does not have a sheet hardness or insufficient adhesion due to an adhesive.

It is a perspective view for demonstrating the kitchen paper X1 of the 1st structural example of this invention. It is the II-II sectional view. It is a perspective view for demonstrating the needle punch of the 1st structural example of this invention. It is a perspective view which shows an example of the usage method of the kitchen paper of this invention. It is the schematic which shows the example of the manufacturing method of the kitchen paper of this invention. It is a perspective view for demonstrating the kitchen paper X2 of the 2nd structural example of this invention. It is a perspective view for demonstrating the kitchen paper X3 of the 3rd structural example of this invention. It is a perspective view for demonstrating the kitchen paper X4 of the 4th structural example of this invention. It is the IX-IX sectional view. It is a perspective view for demonstrating the needle punch of the 4th structural example of this invention. It is a perspective view for demonstrating the other example of the needle punch of this invention. It is a perspective view for demonstrating another example of the needle punch of this invention. It is a perspective view which shows the example of the kitchen paper product concerning this invention.

Next, embodiments of the present invention will be described in detail below with reference to the drawings.
"First structural example"
A first structural example of the present invention will be described with reference to FIGS.
The kitchen paper X1 according to this structural example has a two-ply structure in which a crepe paper 1 and a nonwoven fabric sheet 2 by an airlaid method are laminated, and the laminated integration of the ply structure is a sheet side edge on the side edge of the sheet. A needle punch 10 (hereinafter also referred to as a needle punch line 11) provided linearly along E is used.

  Here, in the present invention, as shown in FIG. 3, the needle punch 10 is preferably punched from the crepe paper 1 side toward the nonwoven fabric sheet 2 side (in FIG. 3, the needle punch driving direction is one point). This is indicated by a chain arrow (the same applies to FIGS. 10 to 12). The needle punch 10 stacks and integrates the sheets 1 and 2 by inserting a sharp needle with a sharp tip. At this time, when the needle is inserted from the crepe paper 1 side toward the nonwoven fabric sheet 2, the dense and hard crepe paper 1 protrudes and bites into the nonwoven fabric sheet 2 as shown in FIG. Are desirable because they are entangled and reliably integrated. When the needle is punched from the nonwoven fabric sheet 2 side toward the crepe paper 1 side, the nonwoven fabric sheet 2 has a coarser fiber density than the crepe paper 1 and the needle passes through the fibers so that the entanglement between the sheets is crepe paper 1. It is weaker than punching from the side.

  The sheets 1 and 2 are not bonded to each other through an adhesive. In this embodiment, since the sheets are laminated and integrated only by the entanglement of the fibers around the punch hole 15 by the needle punch 10 and no adhesive is used, the sheet X1 does not become hard due to the adhesive. Furthermore, conventionally, there is no absorption or transmission of oil / water in the Z-axis direction at the part bonded with the adhesive, and the absorption or transmission of oil / water is inhibited at the part where the adhesive penetrates in the plane direction. Is done. On the other hand, when the sheets are bonded with a needle punch without using an adhesive, the portion where the fibers are bonded to each other is smaller and the gap between the fibers is not clogged by the adhesive. Therefore, the cushioning property and fast liquid absorption speed of the nonwoven fabric sheet 2 and the liquid absorption retention property of the crepe paper 1 are sufficiently exhibited.

  In addition, the side edge part in this invention means the range within 5 cm from the side edge E. In this embodiment, since the adhesive 11 is not used, if the line 11 of the needle punch 10 is in a range exceeding 5 cm, the non-integrated portion of the side edge portion flutters, and the needle punch is started from the non-integrated portion. The possibility that the wire 11 is peeled off and the sheets 1 and 2 are peeled off increases.

  On the other hand, in this embodiment, the needle punch line 11 is preferably arranged along the MD direction of the crepe paper 1 (also referred to as a longitudinal direction or a line flow direction).

  When arranging in this way, as shown schematically in FIG. 5, the continuous air-laid nonwoven sheet S2 and the continuous crepe paper S1 fed out from the raw fabric rolls 1R and 2R are laminated by a ply machine or the like, and then stacked in the peripheral direction. By rotating the rollers 30 on which the needles 31 are arranged and contacting the laminated continuous sheet S3, the needles 31 can be continuously subjected to needle punching by the needles 31 and can be manufactured at high speed.

  On the other hand, in this embodiment, the needle punch 10 is linearly arranged only at both side edges, and no adhesive is used for bonding the sheets 1 and 2. Therefore, the kitchen paper X1 of this embodiment can be formed into a cylindrical shape because the central portion is not integrated as shown in FIG. Therefore, as illustrated, it is suitable for wrapping an object to be packaged F such as food. Particularly, in the present invention, the nonwoven fabric sheet 2 having cushioning properties and air permeability constitutes one layer, and the crepe paper 1 excellent in moisture absorption retention constitutes the other layer. Therefore, when a soft food or the like is stored, the cushioning property of the nonwoven fabric sheet 2 acts effectively. Moreover, if the operation of wiping off the oil and moisture is performed by wrapping the ingredients, the crepe paper 1 effectively exhibits its function. The effect exhibited by accepting such a foodstuff inside the interlayer is an effect that cannot be achieved with a conventional adhesive. In particular, in the present invention, the effect is enhanced by taking a structure in which the crepe paper 1 and the nonwoven fabric sheet 2 are laminated, which is a very characteristic action / effect.

"Second structural example"
Next, a second structure example will be described with reference to FIG. The second structural example is different from the first structural example in the arrangement of the lines 11 by the needle punch 10. In the first structure example, the needle punch line 11 is not formed along the edge E in the CD direction. However, in the present invention, the needle punch 10 is linearly arranged also on the edge E in the CD direction. Yes. That is, the needle punch line 11 is arranged over the peripheral edge E of the kitchen paper X1. Since other configurations are the same as those of the first structure example, description thereof is omitted.

  In the second structural example, since the needle punched wires 11 are arranged along the peripheral edge E of the kitchen paper X1, it is difficult to form a cylindrical shape as in the first structural example. Become strong. In addition, when the layered and integrated product is peeled off by the needle punch wire 11 as compared with the case where the layered and integrated product by the adhesive is peeled off, the fluffing of the peeled portion is less and the material is easily peeled off. Therefore, in this embodiment, it is possible to peel only the needle punch line 11 in one CD direction to form a bag shape having an opening in the CD direction. This is also an advantage of stacking and integrating without using an adhesive.

  In addition, the needle punch line 11 in the CD direction extends in the width direction of the laminated continuous sheet S3 in which the continuous crepe paper S1 and the continuous nonwoven fabric sheet S2 are overlapped although not shown in FIG. A rotating cylinder is provided, and the needle is inserted into the laminated continuous sheet so that the needle is arranged in the cylinder extending direction on the outer surface of the rotating cylinder and rotated. More specifically, the blade of the perforation roll that forms the perforation line in the width direction of the continuous sheet may be processed instead of the needle.

“Third structure example”
Next, a third structure example will be described with reference to FIG. A description of the same points as in the first and second structural examples will be omitted. The third structure example is a form in which the needle punch lines 11 are arranged in a lattice shape in plan view as shown in the illustrated example. When the needle punch wires 11 are arranged in a lattice shape as in this embodiment, the design is improved and the integration of the sheets is strengthened. Here, when the needle punch lines 11 are formed in a lattice shape, both the sheets 1 and 2 can be firmly laminated and integrated. However, unlike the case of applying with an adhesive, the sheets do not become hard. Moreover, compared with the case where it adhere | attaches with an adhesive agent, there exists an advantage that it is easy to isolate | separate which a user intends to peel both sheets.

  As a modification of the third structural example, a honeycomb pattern may be drawn with the needle punch line 11, or a geometric pattern, for example, from one point in the center of the paper (generally a range excluding 5 cm from the edge). An appropriate pattern such as a pattern in which the needle punch lines 11 are arranged radially toward the outside of the paper surface can be used. As a needle punching method, it can be easily manufactured if the above-mentioned press type is adopted.

"Fourth structural example"
Next, a fourth structure example will be described with reference to FIGS. This form has a three-layer structure in which the front and back layers are crepe papers 1A and 1B and the intermediate layer is a nonwoven fabric sheet 2. It is desirable that the MD direction CD direction of the crepe papers 1A and 1B on the front and back surfaces is the same. As in the example of the manufacturing method shown in FIG. 5, each sheet is fed out from the raw roll obtained by winding the continuous crepe paper and the raw roll obtained by winding the continuous non-woven sheet, and then laminated and integrated by a ply machine for stacking and integrating. Can be manufactured easily.

  This form of the illustrated example has such a structure, and, similarly to the first structural example, the needle punches 10 are linearly arranged along the side edges in the MD direction of the crepe paper, and the respective layers 1A, 2, 1B are formed. Stacked and integrated. Here, in this structural example, in order to make the peel strengths of the crepe papers 1A, 1B on the front and back surfaces and the nonwoven fabric sheet 2 of the intermediate layer the same, as shown in FIG. The adjacent needle punch holes 15 are driven in alternating directions with respect to the needle punch hole 15 (the needle punch driving direction is indicated by a one-dot chain arrow in the figure, and the same applies to FIGS. 11 and 12). That is, if the direction in which a certain needle punch hole 15A is driven is the one surface of the kitchen paper X1, the driving direction of the adjacent needle punch holes 15B and 15B constituting the needle punch line 11 together with the needle punch hole 15A is from the other surface. It is configured as follows.

  In the three-layer structure of this embodiment, since the crepe papers 1A and 1B are located on the front and back surfaces of the nonwoven fabric sheet 2, only the crepe papers 1A and 1B on one surface are not easily peeled off by driving from the front and back surfaces. If only the crepe paper 2 on one side is intentionally easily peeled off, an operation of driving the needle only from the other side may be performed.

  As a modification of the present embodiment, as shown in FIG. 11, the punching direction may be alternately changed every appropriate number with regularity instead of alternating. Further, as shown in FIG. 12, the driving direction may be different between one side and the other side in the width direction.

"Needle punch"
Here, the needle punch of the present invention is known to laminate and integrate a laminated sheet by inserting and pulling a needle having a sharp point of 0.2 to 2.0 mm in diameter so as to penetrate the laminated sheet. Technology. In this embodiment, it can be formed by inserting and withdrawing a needle having a sharp tip.

  It is also possible to use a reed needle having a barb at the tip as the needle. However, the present invention can be entangled regardless of the presence or absence of wrinkles because the fibers of the crepe paper are dense. Since the hole diameter of the punch hole becomes large and is not preferable in terms of appearance, it is desirable to perform needle punching with a needle having a sharp tip.

  Here, the interval between the needle holes in the needle punch is 1.0 to 3.0 mm, and the size of the needle hole is not limited, but is preferably 0.1 to 2.0 mm. It should be noted that the diameter of the needle for punching the needle is substantially equal to the needle punch hole formed in the crepe paper.

"Crepe paper"
On the other hand, the crepe paper 1 of the kitchen paper X1 in the present invention desirably contains 90% or more of pulp fibers, and by making it 90% or more, the water absorption retention characteristic of crepe paper that is difficult to be expressed only by the airlaid nonwoven fabric sheet. Effective expression. Here, the pulp fiber content is preferably 98% or more, and more preferably 100%.
About this numerical range, if it is at least 90% or more, there are effects peculiar to crepe paper such as moisture retention and moisture penetration prevention that are difficult to be expressed in the nonwoven fabric sheet.

  Here, wood pulp is desirable as the pulp fiber. Furthermore, wood pulp which is virgin pulp is most preferable, and it is desirable to use 100% of this as raw material fiber. Further, among wood pulps, LBKP (hardwood kraft pulp) and NBKP (conifer kraft pulp) are most preferable. This is because these fibers are generally used for crepe paper in hygienic applications, and there is an advantage that existing equipment can be used without any problems. However, when LBKP and NBKP are used, the properties of the paper differ depending on the blending ratio, which is important. In the kitchen paper of the present invention, when blending and using them, the blending ratio of NBKP is increased. That is, it is desirable that NBKP is 50% or more, preferably 70% or more. NBKP has a longer and firmer fiber than LBKP, and therefore it is easy to develop the desired strength required for kitchen paper.

  As described above, when the constituent fibers of the crepe paper are summarized, in the kitchen paper X1 of the present invention, the most preferable fiber type and blending form are composed of NBKP and LBKP, and are composed of 100% pulp fiber containing 50% or more of NBKP. is there.

  The crepe paper can be produced by a known papermaking process in which a papermaking raw material mainly composed of the above-mentioned raw material fibers is subjected to a wire part, a press part, a dryer part, a creping part, a calendar part and the like. The crepe is preferably applied by a dry crepe method.

On the other hand, the crepe paper 1 has a basis weight of 10.0 to 40.0 g / m ² , preferably 18 to 35 g / m ² , and a dry longitudinal paper force (Fgk) of 800 to 2000 cN, preferably 1200 to 1800 cN. is there.

When the basis weight of the crepe paper 1 is less than 10 g / m ^{2, the} crepe paper is easily torn, and the liquid absorbency is deteriorated. When the basis weight exceeds 40 g / m ² , the crepe paper 1 becomes hard and the usability is reduced when used. Further, when the dry longitudinal paper force of the crepe paper 1 is less than 800 cN, the strength is low and the processing suitability is deteriorated, and when it exceeds 2000 cN, convenience is deteriorated such that it becomes difficult to provide a perforation line for cutting.

  Here, the basis weight (weight per unit area) in the present invention and the specification refers to a value measured based on JIS P 8124. Further, the paper strength and the elongation rate are determined by using a test piece that is cut to a width of 25 mm × a length of 150 mm and cured at 105 ° C. for 10 minutes, using a load cell tensile tester (for example, TG-200N TECHNOGRAPH manufactured by Minebea Co., Ltd.). A test piece 1 ply is set with a gripping interval of 100 mm, and the paper strength and elongation when the test piece breaks are measured. This measurement is performed 10 times, and the average value is used as the paper strength and elongation rate in the present invention.

  Moreover, as a measuring method of thickness, it shall measure using the dial thickness gauge (thickness measuring device) "PEACOCK G type" (made by Ozaki Seisakusho) under the conditions of JIS P8111. Specifically, confirm that there is no dust, dust, etc. between the plunger and the measuring table, lower the plunger on the measuring table, move the memory of the dial thickness gauge to adjust the zero point, and then Raise the plunger, place the sample on the test bench, slowly lower the plunger and read the gauge at that time. At this time, only the plunger is placed. The thickness is an average value obtained by performing measurement 10 times.

"Nonwoven fabric sheet"
The nonwoven fabric sheet 2 in the present invention preferably contains 40%, more preferably 50% or more, and still more preferably 85% or more of hydrophilic fibers. In particular, the nonwoven fabric sheet is preferably made of 100% hydrophilic fiber. By containing 40% or more of hydrophilic fibers, moisture absorption on the nonwoven fabric sheet surface is suitably exhibited. If it is less than 40%, not only the water absorption of the nonwoven fabric sheet itself deteriorates, but also the affinity of crepe paper containing 90% or more of hydrophilic fibers, particularly pulp fibers, deteriorates. It is difficult to maintain layered integration. Further, the moisture transfer from the nonwoven fabric sheet 2 to the crepe paper 1 is not sufficient.

  Here, typical examples of the hydrophilic fiber include pulp fiber and rayon fiber, and pulp fiber is particularly preferable. Pulp fibers have good hydrophilicity and rich cushioning properties and are suitable for airlaid processes. In particular, a pulp fiber having a fiber length of 1.0 to 12.0 mm is preferable. It is easy to form an interfiber gap that brings about a capillary phenomenon that sufficiently exhibits the liquid absorption performance of the kitchen paper X1.

  Among the pulp fibers, wood pulp, particularly wood pulp which is virgin pulp is most preferable, and it is desirable to use 100% as a raw fiber for hydrophilic fibers. It is preferable from the viewpoint of liquid absorption performance such as water and oil absorption speed, liquid retention, and the like, and easy production. Further, among wood pulps, LBKP (hardwood kraft pulp) and NBKP (conifer kraft pulp) are most preferable. When these LBKP and NBKP are used, they can be blended and used, and the blending ratio in that case is arbitrary. However, NBKP is easy to make the fiber length suitable for embossing and airlaid methods, so NBKP is desirably 50 to 100%, preferably 70 to 100%. The blending of LBKP is desirable in terms of flexibility, and may be blended appropriately in consideration of this point. However, LBKP may not be blended. In consideration of the design properties due to whiteness, bleached pulp fibers are used as the wood pulp.

As the fibers other than the hydrophilic fibers, various known chemical fibers used for kitchen paper can be appropriately selected. As described above, in the nonwoven sheet of kitchen paper of the present invention, the ratio of hydrophilic fibers is large, and it is desirable that the fibers are natural fibers such as pulp fibers and rayon fibers, particularly wood pulp. It is desirable to mix fibers that do not interfere with the cushioning property of the airlaid method, such as fibers), and develop a bulkiness.
Examples of chemical fibers include polyolefin fibers, polyamide fibers, and polyester fibers.

  Here, the nonwoven fabric sheet of this invention is manufactured by the airlaid method. This airlaid method is a method in which relatively short fibers are deposited by an air flow and formed into a sheet by an adhesive or the like, and the fiber orientation is innumerable at the surface and in the vicinity thereof. , The constituent fibers are dispersed in a three-dimensional random state, and there are many inter-fiber voids extending in the thickness direction of the sheet, and even for oils with higher viscosity than water While exhibiting a good absorption rate, it has excellent cushioning properties.

In the kitchen paper of the present invention, the fiber orientation by the airlaid method described above is an important feature. That is, as understood from the enlarged cross-sectional view of the needle punch hole portion of FIG. 2, the peripheral edge of the punch hole of the crepe paper penetrates into the air laid non-woven fabric by the fiber orientation of the air laid, and the non-woven fiber around the periphery. Is positioned so as to be entangled, so that the lamination and integration by the needle punch holes is effectively performed. Therefore, it is desirable that no hydroentanglement treatment or the like that impedes this three-dimensional fiber orientation by the airlaid method is performed.
As the adhesive used for bonding the fibers, a known adhesive used for an airlaid nonwoven fabric sheet is used in consideration of the essential use of touching the food of kitchen paper.

On the other hand, the air-laid nonwoven fabric according to the present invention desirably has a basis weight (weight per unit area) of 45.1 to 55 g / m ² and a dry longitudinal paper strength of 300 to 1000 cN. If the basis weight of the nonwoven fabric sheet is less than 45.1 g / m ² , it will be difficult to maintain the paper strength of the kitchen paper as a whole, and the liquid absorbability may also be reduced. If it exceeds 70 g / m ² , the thickness may be too large to be processed, and the strength may be too strong to cause a problem with cutting at the perforation line described later. Further, when the non-woven sheet has a dry longitudinal paper strength of less than 300 cN, the strength is low and processability deteriorates, and when it exceeds 1000, it may be difficult to cut at the perforation line during use.

`` Emboss ''
The kitchen paper of the present invention can impart macro embossing (not shown) to each of the crepe paper and the nonwoven fabric sheet. The crepe paper can also be given microembossing. The design is enhanced by embossing.

  As the embossing form, the embossed form of each sheet can take a nested form, a tip-to-tip form, or a single emboss form in which the laminated sheets are embossed integrally. However, in any type, in order to ensure the effect of the present invention, it is desirable not to bond both sheets using an adhesive. However, if the adhesion area ratio is less than 3%, preferably less than 1%, the adverse effect of being hardened by the adhesive is small, and if within this range, the adhesive may be used for assisting the integration of both sheets. . Of course, it is desirable to use no adhesive.

  Further, the separation between the sheets due to embossing may weaken the lamination and integration by the needle punch, so it is preferable to use a nested type or single embossing in which the distance between the sheets is short.

In particular, the nested type is desirable in that it has excellent liquid absorbability and cushioning properties because voids are formed between the sheets.
Here, the nested format is such that the positional relationship of macro embossing given to each sheet is such that the embossed top of the other sheet faces the embossed bottom of one sheet. The bottom portion is a concave portion when viewed from the facing sheet, and the top portion is a convex portion when viewed from the facing sheet.

  However, since any embossing may cause the sheet to be tightened and hardened by embossing, this point is considered when embossing is applied. However, if an adhesive is not used, the present invention is superior in terms of softness as compared with a technique in which an adhesive and embossing for stacking integration are integrated.

  In addition, if embossing is given, the specific shape of one unit macro emboss and the embossed pattern drawn by these unit macro emboss are appropriate design matters. As a specific example, as unit macro embossing, it can be a dot shape such as a rhombus, an ellipse, a polygon in addition to a square or a circle, and as an embossed pattern drawn by a plurality of unit macro embossing, a floral pattern, Appropriate patterns such as a leopard pattern and a geometric pattern can be obtained, and thereby excellent design can be achieved.

The area of the unit macro emboss in each sheet in plan view is 1.75 to 9.0 mm ² , more preferably 2.00 to 7.50 mm ² , particularly preferably from the viewpoint of excellent visibility and good design. 2.0 to 4.0 mm ² .

  The emboss depth of the unit macro emboss is preferably 1.5 mm or less. When the emboss depth is deep, there is a high possibility that the lamination and integration by the needle punch will be insufficient.

When microembossing is applied to the crepe paper 1, it is desirable that the area of the unit microembossing is 0.04 to 1.0 mm ² and the embossing depth is 0.1 to 0.8 mm. With this micro embossing, the design properties are improved, the wiping property is improved, and the influence on the needle punch stacking and integration is small.

  Embossing of each sheet can be performed by a known method of passing each sheet between a pair of embossing rolls. For example, it is preferable that one is an elastic roll made of rubber or the like and the other is a metal roll having an embossing convex portion.

  In this embodiment, after embossing is applied to each sheet, the sheets are stacked, and the stacked sheets may be needle punched.

"Rolled kitchen paper products"
The kitchen paper X1 of the present invention is a roll-shaped kitchen paper product X2 as shown in FIG. 13, particularly, as a strip, which is wound around a tube core 4 having substantially the same width as the paper width in the short direction. Suitable.

  In this case, the pipe core 4 can be a known one used for this type of kitchen paper product. If a general example is shown, the outer diameter may be about 30 to 50 mm, and the width may be about 100 to 250 mm.

  The winding length of the kitchen paper is desirably 8.8 to 30 m. When the paper tube 4 is used, the outer diameter of the kitchen paper product is preferably 90 to 130 mm.

  On the other hand, it is desirable to provide the perforation lines 5 for cutting over the sheet width direction at predetermined intervals in the kitchen paper longitudinal direction. The interval L1 between the perforation lines 5 is preferably about 48 to 250 mm. If it is less than 48 mm, it will be too small for actual use, and if it exceeds 250 mm, it will become larger compared to tableware and the like, resulting in poor usability.

  The cut tie ratio of the perforation line 5 for cutting is preferably 5: 1 to 8: 1, and the tie portion is preferably 0.75 to 1.25 mm. The perforation strength is 200 to 500 cN. If it does in this way, the fluff of the cut surface of an air laid nonwoven fabric layer will be prevented effectively. The perforation line 5 is preferably arranged in a direction intersecting with the longitudinal direction (also referred to as MD direction) of the crepe paper, and preferably in a direction orthogonal.

  The perforation strength is measured according to the paper strength and elongation measurement method based on the above-mentioned JIS P 8113 with a width of 50 mm and a grip interval of 100 mm, and a perforation line in the center between the grips. Measure as positioned.

  When the needle punch is disposed on the periphery as shown in FIG. 6 described above, the perforation line 5 for cutting is an edge.

  X1 ... Kitchen paper, X2 ... Kitchen paper product, 1R, 2R ... Raw fabric roll, 1S ... Continuous crepe paper, S2 ... Continuous nonwoven fabric sheet, S3 ... Continuous laminated sheet, E ... Kitchen paper side edge, 1, 1A, 1B ... Crepe paper, 2 ... Airlaid nonwoven sheet, 10 ... Needle punch, 11 ... Needle punch wire, 15, 15A, 15B ... Needle punch hole, 31 ... Needle, 30 ... Roll, F ... Package, 4 ... Tube core, 5 ... perforation line for cutting, L1 ... interval between perforation lines.

Claims (12)

It has a ply structure in which crepe paper and a nonwoven fabric sheet by the airlaid method are laminated,
The ply structure is laminated and integrated with a needle punch that punches from the front side to the back side and a needle punch that punches from the back side to the front side. paper. The kitchen paper according to claim 1, wherein only a linear needle punch along the MD direction of the crepe paper is applied. It has a ply structure in which crepe paper and a nonwoven fabric sheet by the airlaid method are laminated,
A kitchen paper, wherein the ply structure is laminated and integrated by a needle punch , and only a linear needle punch along the MD direction of the crepe paper is applied . The crepe paper is provided with 5.0 to 40% of micro embossing with an embossed area of 0.04 to 1.0 mm ² and an embossed depth of 0.1 to 1.0 mm based on the area of one side of the kitchen paper. And the kitchen paper of any one of Claims 1-3 in which the micro embossing is not provided to the nonwoven fabric sheet. It has a ply structure in which crepe paper and a nonwoven fabric sheet by the airlaid method are laminated,
Lamination integration with the ply structure is done by needle punch,
The crepe paper is provided with 5.0 to 40% of micro embossing with an embossed area of 0.04 to 1.0 mm ² and an embossed depth of 0.1 to 1.0 mm based on the area of one side of the kitchen paper. Kitchen paper characterized in that the nonwoven fabric sheet is not provided with microembossing . The nonwoven fabric sheet is a kitchen paper according to any one of claims 1 to 5, comprising 40% or more of pulp fibers having a fiber length of 1.0 to 12.0 mm. It has a ply structure in which crepe paper and a nonwoven fabric sheet by the airlaid method are laminated,
Lamination integration with the ply structure is done by needle punch,
A kitchen paper , wherein the nonwoven fabric sheet contains 40% or more of pulp fibers having a fiber length of 1.0 to 12.0 mm . The kitchen paper according to any one of claims 1 to 7 , wherein the laminated sheets are not adhered by an adhesive. Or a crepe paper and non-woven fabric sheet has a two-layer structure of each further, or front and back surfaces layer is crepe paper, according to claim 1 intermediate layer positioned between the front and back surface layer is a three-layer structure is a nonwoven fabric sheet Kitchen paper of any one of -8 . The kitchen paper according to any one of claims 1 to 9, wherein a needle punch is linearly provided along the edge of the kitchen paper. The needle punches punched from the front surface side toward the back surface side and the needle punches punched from the back surface side toward the front surface side are arranged in parallel so as to be alternately or regularly arranged to form a line . Kitchen paper given in any 1 paragraph . Crepe paper and air-laid nonwoven fabric sheet embossed top portion area 1.75～9.0Mm ² in any one of claims 1 to 11, emboss depth macro embossed 0.9~1.5mm has been granted Kitchen paper as described in

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