JP2011214193A - Paper towel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper towel suitable for oil filtration.SOLUTION: There is provided the paper towel usable for oil filtration, which is two plies provided by laminating an air-laid nonwoven fabric sheet and a crepe paper to integrate, wherein the air-laid nonwoven fabric sheet has a layer structure of two or more layers and a lipophilic synthetic fiber having ≥250°C melting point is contained in layers other than the layer composing the outermost layer of the layer structure.

Description

  The present invention relates to kitchen paper suitable for oil strainers.

  Kitchen paper is hygienic, and is used for cleaning around kitchens, cleaning utensils, food packaging, boiled drop lids, drip absorbents such as fresh fish, water drainers, oil strainers, and excess oil in fried foods. It is used for various purposes around kitchens, such as for use in direct contact with foodstuffs such as absorption. Demand is increasing due to its high convenience.

  On the other hand, among the above-mentioned various uses, sheets other than kitchen paper, such as woven fabrics, are often used for cleaning, draining, etc. In most cases, kitchen paper is used. Although the frequency of use in such applications is not high compared to other applications, its function is regarded as important.

  On the other hand, conventionally, as a configuration of kitchen paper, one formed by laminating an appropriate number of sheets of crepe paper subjected to embossing, or one made only of an airlaid nonwoven sheet is well known. However, both the conventional kitchen paper made of crepe paper and the kitchen paper made of an airlaid non-woven sheet have drawbacks particularly in the application of oil squeezing due to the properties of each sheet.

  For example, a laminate of the above-mentioned crepe paper has a higher fiber density than the airlaid nonwoven fabric sheet, so the liquid permeation rate is slow, and the oil strainer takes time. In addition, the operation of the oil strainer may be, for example, the operation of laying kitchen paper on the bowl-shaped strainer at the top of the oil pot and pouring oil from the top. It is not enough, and when it is laid on a bay-like part such as a strainer, it can be dredged. In addition, since the gap between the crepe papers formed by embossing is crushed in this wrinkled portion and the fibers are dense in the thickness direction, it is difficult for further liquid to permeate. In addition, oil easily accumulates in the ridges, so clogging due to oil residue is likely to occur.

On the other hand, the kitchen paper composed of only one airlaid nonwoven sheet has a high liquid permeation speed compared with a laminate of a plurality of crepe papers, but there are cases where the gap between fibers is wide and a sufficient filtration function is not exhibited. Moreover, since there is a lot of gaps between fibers because of the thickness, a large amount of oil is inevitably left between fibers compared to that of crepe paper, and the amount of wasted oil is large.
Thus, the conventional kitchen paper has the point which should be improved in the use of an oil strainer.

JP-A-6-313290

  Therefore, the main problem of the present invention is that the user who uses the kitchen paper often feels dissatisfied, can reduce the work time of the oil strainer, the absorption speed at the time of the oil strainer is fast, and is resistant to heat, An object of the present invention is to provide a kitchen paper having basic functions required for kitchen paper such as a wiping function and a liquid absorbing function such as water absorption and oil absorption.

The present invention and effects obtained by solving the above problems are as follows.
[Invention of Claim 1]
Kitchen paper used for oil strainer,
It is a two-ply in which crepe paper and airlaid non-woven sheet are stacked and integrated,
The air-laid nonwoven fabric sheet has a layer structure of two or more layers, and a synthetic fiber having a lipophilic property and a melting point of 250 ° C. or higher is contained in a layer other than the layer constituting the outermost surface of kitchen paper. Kitchen paper characterized by.

  In addition, the ply in this invention means what integrated and integrated the sheets, and the integration by the entanglement of the fiber between each sheet | seat is not included. The layer structure of the non-woven fabric sheet includes those integrated by overlapping and integration by entanglement of fibers between layers.

[Invention of Claim 2]
The airlaid nonwoven fabric sheet has a layer structure consisting of a surface layer, a back surface layer, and one or a plurality of intermediate layers positioned therebetween, and the synthetic fibers are contained in at least one of the intermediate layers. Kitchen paper.

[Invention of Claim 3]
The kitchen paper according to claim 1 or 2, wherein the synthetic fiber has a glass transition temperature of 200 ° C or higher.

[Invention of Claim 4]
The kitchen paper according to any one of claims 1 to 3, wherein the kitchen paper has a wrinkle forming portion arranged linearly, and synthetic fibers are arranged along the wrinkle forming portion.

[Invention of Claim 5]
5. The synthetic fiber according to claim 1, wherein the synthetic fiber is arranged so as to draw a cross pattern in a plan view, a pattern extending from 3 to 10 lines from the center of the paper to the radiation, a lattice pattern, and a mesh pattern. The kitchen paper according to item 1.

[Invention of Claim 6]
The kitchen paper according to any one of claims 1 to 5, wherein the synthetic fiber is an aramid fiber.

  As described above, according to the present invention, there is provided a kitchen paper that has basic functions required for kitchen paper such as a wiping function and a water absorption function such as water absorption and oil absorption, and that is particularly excellent in use of an oil strainer.

It is a perspective view for demonstrating the kitchen paper X1 of this invention. It is a perspective view of the kitchen paper of the other form of this invention. It is a perspective view of the kitchen paper of another form of this invention. It is the III-III sectional view. It is a perspective view of the kitchen paper of the other form of this invention. It is sectional drawing of the kitchen paper which has the embossing of this invention. It is a perspective view illustrating the usage aspect of the kitchen paper of the present invention. It is a perspective view 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.
The kitchen paper X1 of the present invention is used for an oil strainer. As shown in FIG. 1, a crepe paper 1 and an airlaid nonwoven fabric sheet 2 (airlaid nonwoven fabric sheet manufactured by an airlaid method) are laminated and integrated. A two-ply structure is used.
The kitchen paper X1 preferably has a basis weight (weight per unit area) of 50 to 70 g / m ² as a whole.

  On the other hand, the airlaid nonwoven fabric sheet 2 has a layer structure of two or more layers, and is lipophilic and has a melting point of 250 ° C. or higher in layers other than the layer constituting the outermost surface (surface) of the kitchen paper X1. Synthetic fibers (hereinafter simply referred to as “lipophilic synthetic fibers”, and the portion of the lipophilic synthetic fibers in the figure is indicated by reference numeral 20). Here, the layer in the air-laid nonwoven fabric 2 in the present invention means not a ply but a fiber layer.

  For the lamination and integration of the crepe paper 1 and the air laid nonwoven sheet 2, bonding by an adhesive, bonding by embossing described later, bonding by contact embossing, bonding by needle punching, or the like can be employed.

  In the case where the crepe paper 1 and the airlaid nonwoven fabric sheet 2 are laminated and integrated through the adhesive 3, it is desirable that the adhesive is scattered in a plan view. This adhesive can be applied by printing, a coating machine, or spray coating. In addition, as for the adhesion area (area of an adhesion part) of both the sheets 1 and 2, it is desirable that it is 5 to 40% with respect to the area of the single side | surface of the kitchen paper X1. When the area ratio is less than 5%, it is easy to peel off, and when it exceeds 40%, the paper becomes hard. In addition, the risk of a decrease in liquid absorption rate increases.

  The adhesive used for adhering the crepe paper 1 and the airlaid nonwoven sheet 2 is selected in consideration of the essential use of touching the food material of the kitchen paper X1 and the oil strainer. Specific examples include PVA (polyvinyl alcohol), CMC (carboxyl methyl cellulose), starch and the like.

  Here, the airlaid method, which is a method for producing the airlaid nonwoven fabric 2, deposits relatively short fibers at a predetermined position by an air flow and adheres them with an adhesive or the like to form a sheet-like pile. The air-laid nonwoven fabric sheet can be formed into a layer structure by intermittently depositing fibers during production, or by adhering a plurality of formed fibers with an adhesive or the like. Examples of the adhesive used for bonding the fibers of the air laid nonwoven sheet include PVA (polyvinyl alcohol), CMC (carboxyl methyl cellulose), starch and the like.

  Here, the air-laid nonwoven fabric sheet 2 has an infinite number of leading ends of the constituent fibers on the surface and in the vicinity thereof, and the constituent fibers are tertiary. Originally dispersed in a random state, and has a feature that many inter-fiber voids extending in the thickness direction of the sheet are formed, and exhibits a good absorption rate even for oils with higher viscosity than water At the same time, it has excellent cushioning properties and effectively exhibits the action and effect of the kitchen paper of the present invention. In the kitchen paper of the present invention, fiber orientation by the airlaid method described above is an important feature. Therefore, hydroentanglement treatment that inhibits three-dimensional fiber orientation by the airlaid method is performed. Desirably not.

  And since the airlaid nonwoven fabric sheet 2 is excellent in the liquid permeation | transmission speed | rate in this way, when using as an oil strainer, it is good to use the airlaid nonwoven fabric sheet surface as a surface.

  Here, as a blending form of the lipophilic synthetic fiber, it may be dispersed and uniformly blended in the fiber layer of the air-laid nonwoven sheet 2, or locally, for example, blended only in the central portion in plan view. You may do it. Preferably, they are arranged so as to draw a cross pattern, a pattern extending from 3 to 10 lines from the center of the paper, and a lattice pattern or a mesh pattern in plan view. FIG. 2 shows a cross-shaped pattern in a plan view (in the form in which four lines extend from one point in the center of the paper to the radiation, and adjacent lines form 90 degrees). Shows a pattern that is partially positioned so as to draw a lattice pattern (a mesh pattern with a square portion where the mesh is removed). In the case of a handle having radial lines, it is desirable that the lines are in contact with each other at the center.

  Here, the central portion in the present invention is a range excluding at least 5 cm from the edge of the kitchen paper. In the case of a form in which the strip-shaped kitchen paper 2 wound in a roll shape, such as a roll form described later, is appropriately wound and cut and used, the center portion is provided with a perforation line for cutting. In this case, the interval between the perforations is defined as a single sheet, and the range excluding the single edge 5 cm is defined as each central portion.

  The line width for drawing the cross and the lattice is preferably 10 mm or more. If it is less than 10 mm, the liquid absorption speed is not sufficiently improved. The upper limit of the line width is not limited, but if the line width is wide and the blended portion of the oleophilic rigid fiber is widened, the whole kitchen paper becomes hard, and it is 10 mm or less considering the cost merit etc. Is desirable.

  Moreover, as for the compounding form of a lipophilic synthetic fiber, Preferably, as can be understood from FIG. 2 and FIG. 4 of the cross-sectional view thereof, the airlaid nonwoven fabric sheet is opposed to the surface layer 21 constituting the kitchen paper surface and the crepe paper. As a layer structure composed of the back layer 22 and one or more intermediate layers 23 positioned therebetween, it is preferable that at least one of the intermediate layers 23 contains the lipophilic synthetic fiber 20.

  In the case of three or more layers, it is particularly suitable in a form in which the lipophilic synthetic fiber 20 is not uniformly dispersed in the fiber layer such as the above-mentioned cross shape or lattice shape. When the lipophilic synthetic fiber is arranged so as to draw a predetermined shape as described above, the touch, softness, and the like of the part are different from those of the other parts, so that the use becomes uncomfortable. In addition, the synthetic fiber itself may cause a decrease in surface smoothness. However, if the lipophilic synthetic fiber 20 is blended in the intermediate layer 23, the surface can be made uniform and uncomfortable.

  On the other hand, the kitchen paper X1 of the present invention preferably has a wrinkle forming portion 25 arranged in a linear shape, and the lipophilic synthetic fiber 20 is arranged along the wrinkle forming portion 25. As described above, when the lipophilic synthetic fiber 20 is positioned in a cross shape or a lattice shape, wrinkles are easily formed along the cross or the lattice, but it is more effective to further provide the wrinkle forming portion 25. The crease forming portion 25 may be provided on either the crepe paper 1 or the airlaid nonwoven sheet 2, but the crepe paper 1 is harder and has a firmer crease, so FIG. 5 (kitchen paper in FIG. 3). As shown in the perspective view from the back side of the crepe paper 1. Of course, you may provide in both. Here, the wrinkle forming portion 25 is a part that intentionally easily forms wrinkles and creases on the line. For example, a perforation line (illustrated example), a needle punch line, a pre-formed fold line, etc. It can be illustrated. When the crease forming portion 25 is provided on the crepe paper 1 as a perforation line or a needle punch, an auxiliary effect of liquid permeability resulting from a hole (cut portion) such as a perforation line is also obtained. By providing the crease forming part 25 with a perforation line or the like on the crepe paper 1 having a lower liquid permeability than the air laid nonwoven fabric sheet 2, the effect of improving the liquid permeation rate is exhibited along with the formation of the crease.

  Here, in general, an oil pot for storing used oil is used for oil scouring. And this oil pot has the structure which has the metal-mesh surface (filter part) formed with a bowl-shaped and dish-shaped curved surface in the upper part, and has a storage part in the lower part. When squeezing oil, lay flat kitchen paper on the bowl-shaped and dish-shaped strainers, and pour the used oil into the pot. That is, oil is filtered with kitchen paper X1 and a wire mesh. And when flat kitchen paper is laid on the curved surface, not a little wrinkles occur. In the kitchen paper X1, the wrinkle portion becomes dense as the layers and fibers constituting the ply come close to each other and the liquid permeability decreases. Further, oil is easily stored in this portion, and fine oil residue is likely to be clogged, resulting in a further decrease in liquid permeability. As described in the prior art, the occurrence of the soot and the ease of storing the oil in the buttocks were one factor that made the operation of the oil strainer time consuming.

In this embodiment, the part where the wrinkle is intentionally generated is defined, and the lipophilic synthetic fiber having high liquid permeability is positioned in the part, so that oil squeezing can be performed at an extremely high speed. Therefore, for example, when the kitchen paper of this embodiment is laid on the strainer at the upper part of the oil pot as described above, or when the oil is poured and poured, as shown in FIG. Will occur. And since the lipophilic synthetic fiber is arranged along this collar part, a liquid is rapidly absorbed and filtered in the collar part, and filtration time is shortened conventionally.
Moreover, the kitchen paper of the present invention can be used without problems for other uses of kitchen paper such as wiping applications.

  Here, the oleophilic synthetic fiber in the present invention is oleophilic as described above and has a melting point of 250 ° C. or higher, and particularly preferably has a glass transition temperature of 200 ° C. or higher. By being lipophilic, the filtration rate can be increased, and by setting the melting point to 250 ° C. or higher, the synthetic fiber does not dissolve in the oil even when touched at high temperature immediately after cooking such as tempura. . In particular, if the glass transition temperature is 250 degrees, the hot oil immediately after cooking can be processed without cooling, and the synthetic fiber does not become excessively soft even when touched with such hot oil. Since the stiffness of the oil is not lost, the oil filter can be easily filtered. In particular, there is a synergistic effect when the wrinkle forming part is provided.

  The fineness of the lipophilic synthetic fiber 25 is 2.0 to 10 dtex, preferably 2 to 3 dtex. If it is less than 2.0, it is difficult to produce, and it is difficult for the nonwoven fabric sheet to exhibit stiffness. In addition, there is a tendency that the fibers are too dense, and the liquid permeability may be delayed. If it exceeds 10 dtex, it becomes hard and difficult to use. The length (cut length) of the lipophilic synthetic fiber is 3 to 51 mm, preferably 7 to 13 mm. If it is less than 3 mm, it is difficult to produce, and it is difficult to express stiffness in paper. In addition, there is a tendency that the fibers are too dense, and the liquid permeability may be delayed. If it exceeds 51 mm, it will be soft.

  Here, as the lipophilic synthetic fiber 25, an aramid fiber is most preferable. Aramid fiber (a para-amide obtained by co-condensation polymerization from p-phenylenediamine and terephthalic acid chloride. Specific product names include Kevlar (manufactured by DuPont) and Nomex (manufactured by Teijin Techno Products). An aramid fiber has high heat resistance and water resistance, and has a firmness and flexibility, and exhibits an extremely high tensile strength regardless of whether it is wet or dry. In consideration of the length and fiber type, the fiber may be opened and cut as appropriate.

  The blending ratio of the lipophilic synthetic fiber 25 in the air laid nonwoven fabric sheet 2 is suitably 10 to 50% by weight. If it is less than 10% by weight, the effect of improving the liquid permeability speed of the present invention is not sufficient. On the other hand, if it exceeds 50% by weight, the water wiping property is deteriorated and the cost may be increased. In particular, aramid fibers are expensive, and if they are used in excess of 50%, the cost becomes high.

  As the constituent fibers other than the lipophilic synthetic fibers in the air laid nonwoven fabric sheet 2, hydrophilic fibers are suitable. Especially pulp fibers are suitable. Rayon fibers are not desirable in terms of heat resistance. Pulp fibers have good hydrophilicity and rich cushioning properties, and are also suitable for the airlaid method. In particular, a pulp fiber having a fiber length of 1.0 to 12.0 mm is preferable.

  As the pulp fiber suitably used as the fiber other than the lipophilic synthetic fiber, wood pulp, particularly wood pulp which is virgin pulp is most preferable. 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. In consideration of the design properties due to whiteness, bleached pulp fibers are used as the wood pulp.

On the other hand, in the kitchen paper X1 of the present invention, the air-laid nonwoven fabric sheet 2 may have a basis weight of 45.1 to 70.0 g / m ² and a dry longitudinal paper strength (Fgh) of 300 to 1000 cN. More preferably, the basis weight is 45.1 to 55 g / m ² and the dry longitudinal paper strength is 400 to 600 cN. If the basis weight of the airlaid nonwoven fabric sheet 2 is less than 45.1 g / m ² , it will be difficult to maintain the paper strength of the kitchen paper X1 as a whole, and the liquid absorbency 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, which may cause problems with cutting at the perforation line 5 described later. Further, when the airlaid nonwoven fabric sheet 2 has a dry longitudinal paper strength of less than 300 cN, the strength is low and processing suitability deteriorates, and when it exceeds 1000 cN, it becomes difficult to give an appropriate perforation line, which will be described later, and cutting properties deteriorate.

  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 as follows: a test piece cut to a width of 25 mm × a length of 150 mm is used, and the load interval of a load cell tensile tester (for example, TG-200N TECHNOGRAPH from Minebea Co., Ltd.) is set to 100 mm. Is set, 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.

<Composition and physical properties of 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 moisture absorption retention characteristic of crepe paper, which is not good at airlaid nonwoven fabric sheets, is effective. Expresses. 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, which are not good for nonwoven fabrics.

  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, it becomes difficult to give an appropriate perforation line to be described later, and the cutting property is deteriorated.

<Emboss>
On the other hand, the kitchen paper X1 of the present invention can give macro embosses 18 and 28 to the crepe paper 1 and the airlaid nonwoven fabric sheet 2, respectively, as shown in a sectional view in FIG. In this case, they can be laminated and integrated in a nested manner. Preferably, the crepe paper 1 is provided with microembossing (not shown).

  Preferably, as shown in the illustrated example, in the nested format, the layers are integrated and integrated by the adhesive 30 applied only to the 18t top of the macro emboss 18 of the crepe paper 1, and the macro emboss 28 of the airlaid nonwoven fabric sheet 2 is integrated. The top portion 28t is not provided with an adhesive.

  In this preferable form, in the laminated integration by bonding the sheets 1 and 2, it is sufficient to apply an adhesive to one sheet, and the crepe paper 1 is more clogged with fibers than the airlaid nonwoven sheet 2. The reason is that it is easy to apply an adhesive to the top 18t because the macro emboss 18 is firmly inserted. Even if the air-laid nonwoven fabric sheet 2 can apply an adhesive to the embossed top portion 28t, it may not be securely bonded to the crepe paper 1 due to cushioning properties. Furthermore, due to the feature that the fiber density of the air laid nonwoven fabric is coarse, the adhesive penetrates between the fibers and it is difficult to stop at the top part. From this point, the adhesiveness is also difficult.

  And since it is sufficient to apply an adhesive to one of the sheets, the amount of adhesive used can be reduced in the form of applying the adhesive, and the portion where the substantial absorbency is lowered as the applied portion of the adhesive There is an advantage that can reduce the area of

  Here, the nested type in the kitchen paper X1 of the present invention refers to the positional relationship between the macro embosses 18 and 28 applied to the sheets 1 and 2 with respect to the embossed bottom of one sheet and the embossed top of the other sheet. The departments face each other.

  The top portions 18t and 28t are top surfaces of convex portions protruding so as to approach each other as viewed from the facing sheet, and the bottom portions are bottom surfaces of concave portions recessed so as to be separated from the facing sheet.

  Here, the specific shape in plan view of one unit macro emboss 18 and 28 and the embossed pattern drawn by the 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 1 and 2 in plan view is at least 1.75 to 9.0 mm ² , more preferably 2.00 to 7.50 mm ² , and particularly preferably 2.0 at least in the crepe paper 1. ˜4.0 mm ² . If the area of the unit macro emboss 10 is too small, sufficient adhesive strength between sheets cannot be obtained. On the other hand, if the area of the unit emboss is too large, the volume of the absorption space due to macro embossing becomes excessively small, so that sufficient absorption capacity cannot be obtained.

  The embossed area ratio of the macro embosses 18 and 28 in each of the sheets 1 and 2 (the total area of the unit macro embosses) is preferably 5 to 40% with respect to the area of one side of the kitchen paper X1. When the area ratio is less than 5%, the voids are easily crushed and the effect of imparting macro embossing is reduced, and the adhesion between the two sheets is insufficient, and separation between the sheets is likely to occur. Moreover, there is a possibility that the liquid absorption performance of the sheet itself exceeding 40% may be hindered. For example, in the use of absorbing excess oil in fried foods, which is one of the uses of kitchen paper, the installation area of the food material is reduced and desired. Absorption performance may not be obtained. In particular, when the area of the macro embossing with respect to the air-laid nonwoven fabric sheet 2 is in the above range, the elongation specific to the air-laid nonwoven fabric sheet is sufficiently exhibited, and it is also suitable in terms of workability.

  On the other hand, the bonding area ratio between the airlaid nonwoven fabric sheet 2 and the crepe paper 1, that is, the ratio of the area of the portion bonded with the adhesive to the sheet area (one side) is 3 to 40%, more preferably 3 to 20%. It is good. If it is this range, the influence of the hardening by an adhesive agent is small, and the softness by a macro embossing process can fully be ensured, and the influence of the oil absorption inhibition by an adhesion part is also small.

  A known acrylic resin, PVA (polyvinyl alcohol), CMC (carboxylmethyl cellulose), starch, or the like that is used for bonding air-laid nonwoven sheets is suitable as the adhesive used for bonding the sheets.

On the other hand, regarding the micro embossing in the crepe paper 1 preferably applied, it is desirable that the area of the unit micro embossing is 0.04 to 1.0 mm ² and the embossing depth is 0.1 to 0.8 mm. The micro embossing is preferably given in an amount of 5.0 to 40% with respect to the area of one side of the kitchen paper X1. By providing the micro embossing, further improvement in design properties and suppleness of the crepe paper 1 are expressed. Further, the area of the portion facing the air laid nonwoven sheet surface is increased, and the liquid transfer property from the further air laid nonwoven sheet to the crepe paper 1 is increased.

<Rolled kitchen paper products>
As shown in FIG. 8, the kitchen paper X1 of the present invention is a roll-shaped kitchen paper product X2 by, for example, winding it around a tube core 4 having the same width as the paper width in the short direction as shown in FIG. Suitable for
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.

  As can be understood from FIG. 8, when the lipophilic synthetic fiber is arranged so as to draw the above-described cross, the gap between the adjacent perforation lines 5 is viewed in the same manner as one piece of sheet. Just draw a cross.

  On the other hand, the cut tie ratio of the cutting perforation 5 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 JIS P 8113 described above so that the perforation line is positioned in the center in the longitudinal direction with a width of 50 mm and a grip interval of 100 mm. To measure.

Samples 1 to 3 were prepared and verified for the oil absorption rate of the airlaid nonwoven fabric according to the present invention. Samples 1 and 2 are air-laid nonwoven sheets according to the present invention, and sample 3 is a comparative example.
(Sample 1) Sample 1 is an airlaid nonwoven fabric having a three-layer structure in which the surface layer is a layer made of pulp fibers, the intermediate layer is a layer made of aramid fibers, and the back layer is a layer made of pulp fibers. The basis weight (weight per unit area) of each layer is a surface layer 15 g / m ² , an intermediate layer 10 g / m ² , and a back layer 15 g / m ² .
(Sample 2) Sample 2 is an airlaid nonwoven fabric having a three-layer structure, in which the surface layer is a layer made of pulp fibers, the intermediate layer is a layer made of aramid fibers, and the back layer is a layer made of pulp fibers. The basis weight (weight per unit area) of each layer is a surface layer 15 g / m ² , an intermediate layer 10 g / m ² , and a back layer 15 g / m ² .
(Sample 3) Sample 3 is an airlaid nonwoven fabric sheet having a three-layer structure in which all of the surface layer, the intermediate layer, and the back surface layer are made of pulp fibers. The basis weight (weight per unit area) of each layer is 15 g / m ² .
In addition, the aramid fiber used in each sample has a fineness of 2.2 dtex and a fiber length of 10 mm.

(Test method)
The test method is to cut a sample into a 5 cm × 5 cm square, drop 1 cc of salad oil (Nisshin Oillio Group Co., Ltd.) with a micropipette from a position of 1 cm on the test piece, and use salad oil from the surface of the test piece. The time until the gloss disappeared was measured. The determination of the loss of gloss was made visually.

(result)
As a result, Sample 1 and Sample 2 were 4 seconds, and Sample 3 was 7 seconds. When sample 4 and sample 3 are compared, sample 2 has a faster absorption rate despite the large total basis weight. Further, when Sample 1 and Sample 2 are compared, the speed is improved regardless of the blending ratio of the aramid fibers. ...

  X1 ... kitchen paper, X2 ... kitchen paper product, 1 ... crepe paper, 2 ... airlaid nonwoven fabric sheet, 3 ... adhesive, 4 ... paper tube, 5 ... perforation line, 20 ... lipophilic synthetic fiber, 21 ... airlaid nonwoven fabric sheet Surface layer, 22 ... Back layer of air laid nonwoven sheet, 23 ... Intermediate layer of air laid nonwoven sheet, 25 ... Wrinkle forming part, 18, 28 ... Macro embossing (may be referred to as unit macro embossing), 18t, 28t ... Macro embossing 18w, 28w ... side wall of macro emboss, 30 ... adhesive, L1 ... spacing between perforations.

Claims (6)

Kitchen paper used for oil strainer,
It is a two-ply in which crepe paper and airlaid non-woven sheet are stacked and integrated,
The air-laid nonwoven fabric sheet has a layer structure of two or more layers, and a synthetic fiber having a lipophilic property and a melting point of 250 ° C. or higher is contained in a layer other than the layer constituting the outermost surface of kitchen paper. Kitchen paper characterized by.   The airlaid nonwoven fabric sheet has a layer structure consisting of a surface layer, a back surface layer, and one or a plurality of intermediate layers positioned therebetween, and the synthetic fibers are contained in at least one of the intermediate layers. Kitchen paper.   The kitchen paper according to claim 1 or 2, wherein the synthetic fiber has a glass transition temperature of 200 ° C or higher.   The kitchen paper according to any one of claims 1 to 3, wherein the kitchen paper has a wrinkle forming portion arranged linearly, and synthetic fibers are arranged along the wrinkle forming portion.   5. The synthetic fiber according to claim 1, wherein the synthetic fiber is arranged so as to draw a pattern in which 3 to 10 lines are extended from the cross, the lattice, or the central portion of the paper in a plan view. Kitchen paper.   The kitchen paper according to any one of claims 1 to 5, wherein the synthetic fiber is an aramid fiber.

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