JP7447187B2 - kitchen towel - Google Patents

Description

The present disclosure relates to kitchen towels.

In the kitchen, kitchen towels are used for a variety of purposes, including draining food, wiping water from dishes, cleaning various utensils and the kitchen, and straining oil. In all of these various uses, kitchen towels are required to have high water absorbency.

Widely used means for increasing the water absorbency of kitchen towels are the uneven structure provided on the front and back surfaces of the towel paper, which is the material used to make kitchen towels, and the ply structure of the towel paper.

For example, Patent Document 1 states, ``Double embossing is a process in which two ply sheets are each embossed, and the two plies are laminated so that the convex surfaces of the embossments on each sheet face each other, or the convex and concave surfaces face each other.'' , introduces the uneven structure and ply structure of the sheet (see paragraph [0022] of Patent Document 1).

As for the number of plies in a kitchen towel, the more plies there are, the more absorbent it should be. On the other hand, with roll-type kitchen towels, increasing the number of plies increases the roll diameter, and when comparing rolls with the same diameter, the number of cuts is forced to decrease. Therefore, for example, in Patent Document 1, there are many examples that express the opinion that ``The number of plies of the sheet constituting the kitchen towel roll of the present invention is not limited, but it is preferably 2 to 3 plies, and more preferably 2 plies.''

Among them, Patent Documents 2 to 5 disclose kitchen towels having a three-ply structure. What all four of these documents have in common is that
(B) It has a 3-ply structure consisting of a middle layer and both outer layers. (B) The middle layer has a flat plate shape with no unevenness, and both outer layers have an embossed finish. (d) The tops of the embossed convex portions of both outer layers and the middle layer are bonded together with an adhesive.

JP2019-013336A Japanese Patent Application Publication No. 2013-208299 JP2013-209778A Japanese Patent Application Publication No. 2016-211136 Japanese Patent Application Publication No. 2018-154957

The kitchen towels described in Patent Documents 2 to 5 adopt the configuration (c) above to form a gap (void 13) between the middle layer and both outer layers in advance, thereby reducing water absorption in this area. Are expected. For example, paragraph [0013] of Patent Documents 2 and 3 states, ``... Therefore, when liquid such as water or oil is absorbed from both outer surfaces, the liquid is transferred to the gap between the middle layer and the outer layer, and then "It is absorbed and retained in the middle layer" (paragraphs [0012] of Patent Documents 4 and 5 are similar).

Therefore, it can be said that the gap between the middle layer and both outer layers is an essential essential structure for the kitchen towels described in Patent Documents 2 to 5.

However, the 3-ply kitchen towels described in Patent Documents 2 to 5 adopt the configuration (c) above so as to provide voids on both sides of the middle layer, and as a result, when manufactured in roll form (Patent Documents 2 to 5) (see FIG. 1), the roll diameter inevitably becomes larger, or if the roll diameter is to be avoided, the number of cuts must be reduced. The 3-ply kitchen towels shown in Patent Documents 2 to 5 do not overturn the opinion of the majority that ``2-ply is more preferable than 3-ply'' mentioned above with reference to Patent Document 1.

An object of the present disclosure is to obtain a kitchen towel that can suppress increase in roll diameter while improving absorbency due to three plies.

The kitchen towel includes three sheets of towel paper having irregularities on the front and back surfaces, and a joint portion that fits the convex portion into the recess provided on the front and back surfaces to join the three sheets of towel paper in a stacked state. , a core formed by winding the three overlapping sheets of towel paper into a roll, two of the three sheets of towel paper are temporarily joined by nested embossing , and these two sheets of the towel paper and the remaining towel paper are bonded together by glue provided on the facing portion of the concave portion and the convex portion, and the convex portion of the temporarily bonded two sheets of towel paper and , the angle of inclination of the concave portion with respect to the remaining towel paper is greater than the inclination angle of the convex portion with respect to the two sheets of towel paper between the concave portion of the remaining towel paper. The nested emboss temporarily connects the two sheets of towel paper by fitting the concave portion and the convex portion into each other.

It is possible to suppress an increase in the roll diameter.

FIG. 1 is a perspective view showing a kitchen towel according to the present embodiment. A schematic diagram showing an enlarged longitudinal section of the embossed part. A schematic diagram for explaining the glue coming off phenomenon. FIG. 3 is a schematic diagram showing, in a vertical cross section, a state in which a glue removal phenomenon occurs in a two-ply comparative example (comparative example 1) having a nested structure. FIG. 3 is a schematic diagram illustrating the difference in thickness between a two-ply comparative example (comparative example 1) having a nested structure and the present embodiment. FIG. 7 is a schematic diagram illustrating the difference in thickness between a 3-ply comparative example (comparative example 2) having a tip-to-tip structure and this embodiment.

An embodiment of the kitchen towel will be described along the following items.
1. Basic configuration 2. Towel paper (1) 3-ply structure (2) Bonding by nested embossing (3) Bonding by glue (4) Voids (5) Basis weight (6) Klemm water absorption 3. Effects (1) Water absorption (2) Thickness (Comparative example 1)
(Comparative example 2)

1. Basic Configuration The kitchen towel 11 of this embodiment is a 3-ply roll type.

As shown in FIG. 1, the towel roll 31 that forms the main body of the kitchen towel 11 is wound around a core 51 to form a roll. Perforations 32 are periodically made in the towel roll 31 in the roll length direction. The perforations 32 are placed at positions that define the length of the towel roll 31 for one use, and by cutting the towel roll 31 along the perforations 32, a towel sheet 31a of a size suitable for one use is obtained. can be obtained.

As illustrated in FIG. 1, the length and diameter of the towel roll 31 are, for example,
・Reel length: 10-65m
・Rolling diameter: 85-150mm
It is. Depending on the length of the towel roll 31, the number of cuts of the towel sheet 31a can be set, for example, to 50 cuts, 100 cuts, 150 cuts, etc. The winding diameter increases in proportion to the winding length.

If the strength of the core 51 is too low, it will easily collapse when the towel roll 31 is wound around it. On the other hand, if the core 51 is required to have an unnecessarily high strength, there is a problem in that material costs and manufacturing costs increase, and productivity decreases. Therefore, the core 51 is required to have moderate strength. Such moderateness can be quantified as apparent basis weight. As an example, the core 51 is
・Appearance basis weight: 120-550g/m ²
have.

In this embodiment, the apparent basis weight of the core 51 is
(core mass) ÷ (core outer surface area)
It is expressed as If the roll width of the kitchen towel 11 is, for example, 212 mm, the above-mentioned "core mass" and "core outer surface area" are the mass and outer surface area of the core 51 converted per roll width of 212 mm. As an example, when the core mass per roll width of 212 mm is 8.8 g and the outer diameter of the core is 40 mm, the apparent basis weight (W) of the core 51 is:
W=8.8÷{(3.14×40mm/1000)×(212mm/1000)}
=330g/ ^m2
become.

The reason for bringing up the concept of "apparent" in this way is that the thickness of the core 51 is not uniform. Normally, the core 51 is manufactured by bonding two sheets of core base paper with an adhesive or the like. If the core is made from a single sheet of core base paper, it will have a uniform thickness, but when two core base papers are glued together, the core base papers overlap each other, resulting in thickened areas. Therefore, we introduced the concept of "apparent" basis weight and quantified the appropriate strength of the core 51.

2. Towel Paper (1) 3-Ply Structure As shown in FIG. 2, the towel roll 31 has a 3-ply structure in which three sheets of towel paper 31A, 31B, and 31C are stacked on top of each other. Embosses 33 are formed on each of the three towel papers 31A, 31B, and 31C, and a recess 34 is provided on one side and a protrusion 35 is provided on the opposite side. Therefore, each towel paper 31A, 31B, 31C has irregularities on the front and back surfaces.

The three towel papers 31A, 31B, and 31C are overlapped with each other by fitting the convex portions 35 into the concave portions 34, and in this state are combined with the joint portion 36. The convex portion 35 of the towel paper 31A fits into the concave portion 34 of the towel paper 31B, and the convex portion 35 of the towel paper 31B fits into the concave portion 34 of the towel paper 31C, creating a so-called nested structure. However, the joining portion 36 uses different joining methods to join the towel paper 31A and the towel paper 31B and the towel paper 31B and the towel paper 31C.

(2) Bonding by nested embossment The towel paper 31A and the towel paper 31B are bonded by a nested embossment 37. The nested embossing 37 is realized, for example, by simultaneously embossing two sheets of towel paper, ie, towel paper 31A and towel paper 31B. The two towel papers 31A and 31B are combined by being pressed simultaneously during embossing. However, the bond between the two towel papers 31A and 31B can be easily broken if force is applied in the direction of separating them from each other, so the bond in this case can also be said to be a temporary bond.

(3) Bonding by Glue The towel paper 31B and the towel paper 31C are bonded by a glue 38 provided at the opposing portions of the concave portions 34 and convex portions 35. As an example, after nested embossing is applied to towel paper 31A and towel paper 31B, and embossing is applied to towel paper 31C, glue is applied to either one of the towel paper 31B and towel paper 31C. Joined by 38.

As shown in FIG. 3, in the manufacturing process, glue 38 is supplied only between towel paper 31B and towel paper 31C. At this time, in this embodiment, a low viscosity glue 38 is used.

As shown in FIG. 4, when a low-viscosity glue 38 is used to manufacture the two-ply towel roll C1 shown as Comparative Example 1, the glue 38 soaks into the towel paper 31B and oozes out from the opposite side. This is the so-called adhesive phenomenon. For this reason, it is not possible to use glue 38 with a very low viscosity for the two-ply towel roll C1. In FIGS. 3 and 4, the glue 38 removed from the towel paper 31B is indicated by a reference numeral 38a.

As shown in FIG. 3, this embodiment takes advantage of such a glue removal phenomenon that occurs when using low-viscosity glue 38, and uses low-viscosity glue 38 supplied between towel paper 31B and towel paper 31C. The glue 38 is passed around between the towel paper 31A and the towel paper 31B to reinforce the bonding force due to the nested embossing process between these two towel papers 31A and 31B.

(4) Gap As shown in FIGS. 2 and 3, the embossment 33 on the towel paper 31C is larger than the embossment 33 on the nested towel paper 31A and 31B, and is at an angle relative to the paper surface. is being relaxed. As a result, a gap 39 is formed between the convex portion 35 of the towel paper 31B and the concave portion 34 of the towel paper 31C. However, in practice, only one of the sizes and angles with respect to the paper surface of the embossing 33 applied to the nested towel papers 31A and 31B and the embossing 33 applied to the towel paper 31C will be set as described above. A configuration that satisfies the conditions may be used. If either the size or the angle with respect to the paper surface satisfies the above conditions, a gap 39 is formed between the convex portion 35 of the towel paper 31B and the concave portion 34 of the towel paper 31C.

(5) Basis weight The three sheets of towel paper 31A, 31B, and 31C each have the following basis weight:
- Basis weight: 10 to less than 19 g/m ² is used. All three sheets may have the same basis weight, each may have a different basis weight, or two sheets may have the same basis weight and the remaining one may have a different basis weight.

The basis weight of the above-mentioned individual towel papers 31A, 31B, and 31C is smaller than, for example, the two-ply towel roll C1 of Comparative Example 1 illustrated in FIG. are set to be the same.

(6) Klemm Water Absorption The Klemm water absorbency of the towel roll 31 made by stacking three sheets of towel paper 31A, 31B, and 31C is as follows.
・Krem water absorption when immersed in fresh water: 110 mm or more ・Krem water absorption when immersed in a solution of 10% sugar dissolved in fresh water: 100 mm or more ・Immersed in a solution of 10% salt dissolved in fresh water Krem water absorption when immersed in tempura oil: 40 mm or more

3. Effects With this configuration, the towel sheet 31a cut from the perforation 32 is used for various purposes such as draining food, wiping water from dishes, cleaning various utensils and kitchens, and straining oil. Absorbs and passes through oils and oils.

(1) Water absorption amount Liquids such as water and oil that come into contact with the surface of the towel sheet 31a are absorbed by, for example, the towel paper 31C, and when the water absorption limit of the towel paper 31C is exceeded, it enters the void 39 and is absorbed by the towel paper 31B. . When the water absorption limit of the towel paper 31B is exceeded, the water enters between the towel paper 31B and the towel paper 31A, creating a second gap 40 (see FIG. 2), and is absorbed by the towel paper 31A. The liquid exceeding the water absorption limit of the towel paper 31A leaks out from the towel sheet 31a.

On the other hand, when liquid is absorbed from the side of the towel paper 31A, when the water absorption limit of the towel paper 31A is exceeded, it enters between the liquid and the towel paper 31B, creating a second gap 40, and is absorbed by the towel paper 31B. When the water absorption limit of the towel paper 31B is exceeded, it enters the void 39 and is absorbed by the towel paper 31C. The liquid exceeding the water absorption limit of the towel paper 31C leaks out from the towel sheet 31a.

In the water absorption mechanism described above, the liquid that has entered the gap 39 deforms the convex portion 35 of the towel paper 31C and increases the volume of the gap 39. The liquid that has entered the second gap 40 deforms the convex portion 35 of the towel paper 31A and increases the volume of the second gap 40. Therefore, the liquid absorbed by the towel sheet 31a is stored not only in the three sheets of towel paper 31A, 31B, and 31C, but also in the gap 39 and the second gap 40 that are generated and enlarged on both sides of the towel paper 31B. As a result, the kitchen towel 11 of this embodiment can exhibit an excellent water absorption effect even though all three towel papers 31A, 31B, and 31C are stacked in a nested structure.

The high water absorption performance of the kitchen towel 11 of this embodiment is confirmed to be superior to a two-ply product from the experimental results described later. Therefore, according to the kitchen towel 11 of this embodiment, it is possible to expect an increase in the number of cuts due to the lengthening of the towel roll 31. The reason is as follows.

When the length of the towel roll 31 is increased, the winding of the roll inevitably becomes stiffer. As a result, the embossment 33 becomes easily crushed, and its water absorbency decreases accordingly. Further, during manufacturing, it is necessary to roll the film while pulling it more forcefully than usual, which makes the above-mentioned adhesive removal phenomenon more likely to occur, and the yield rate decreases accordingly. For this reason, with the two-ply kitchen towel 11, it is difficult to make it long enough to allow, for example, 150 cuts or more.

In this regard, with the kitchen towel 11 of this embodiment, there are no problems associated with increasing the length, both because of its high water absorbency and because of the above-mentioned structure that actively utilizes the adhesive removal phenomenon. Therefore, the length of the towel roll 31 can be increased, the number of cuts can be increased, and more towel sheets 31a can be provided to the user from one kitchen towel 11.

(2) Thickness The towel roll 31 of this embodiment will be compared with a comparative example.

(Comparative example 1)
As shown in FIG. 5, the two-ply towel roll C1 shown in FIG. 4 having a nested structure is used as Comparative Example 1, and its thickness is compared with the towel roll 31 of the present embodiment. In FIG. 5, the left side is the towel roll 31 of this embodiment, and the right side is the towel roll C1 of Comparative Example 1.

The towel roll 31 of this embodiment has a thickness T. On the other hand, the thickness of the towel roll C1 of Comparative Example 1 is TC1, which is thinner by D1 than the thickness T of the towel roll 31 of the present embodiment. In other words,
T-TC1=D1
Therefore, the towel roll 31 of this embodiment is thicker than the towel roll C1 of Comparative Example 1 by +D1.

However, the thickness +D1 is only the thickness of one sheet of towel paper 31A, and only a slight increase in thickness occurs.

(Comparative example 2)
As shown in FIG. 6, a 3-ply towel roll C2 having a tip-to-tip structure is used as Comparative Example 2, and its thickness is compared with the towel roll 31 of this embodiment. In FIG. 6, the left side is the towel roll 31 of this embodiment, and the right side is the towel roll C2 of Comparative Example 2.

The thickness of the towel roll 31 in this embodiment is the thickness T as described above. On the other hand, the thickness of the towel roll C2 of Comparative Example 2 is TC2, which is thicker than the thickness T of the towel roll 31 of the present embodiment by D2. In other words,
T-TC2=-D2
Therefore, the towel roll 31 of this embodiment has a thickness smaller than that of the towel roll C2 of Comparative Example 2 by −D2.

Referring to FIG. 6, it can be seen that -D2 is equal to the height of the convex portion 35 of the embossing 33 formed on the towel paper 31A forming a part of the towel roll C2 of Comparative Example 2.

From the above comparison results, the thickness of the towel roll 31 of this embodiment, when viewed from the perspective of the roll diameter of the kitchen towel 11, does not significantly increase the roll diameter compared to, for example, a conventional 2-ply product. is clear. Therefore, even when the roll diameter is set to 85 to 150 mm as described above, it is possible to secure the same number of cuts that can obtain the towel sheet 31a from the towel roll 31 as in a two-ply product.

The kitchen towel of this embodiment and the kitchen towel of Comparative Example 1 were prototyped and compared.
Table 1 shows the results.

In this embodiment,
・Roll width: 212mm
・Basic weight of towel roll: 43.5g/ ^m2
And so. The towel roll corresponds to the 3-ply towel roll 31 (towel sheet 31a) in which three sheets of towel paper 31A, 31B, and 31C are laminated as introduced in the above [Detailed Description of the Invention].
In comparative example 1,
・Roll width: 212mm
・Basic weight of towel roll: 44.2g/ ^m2
And so. The towel roll corresponds to the two-ply towel roll 31 (towel sheet 31a) of Comparative Example 1 introduced in FIG. 4 of the above [Detailed Description of the Invention].

Wet tensile strength was measured using a tensile tester AG-IS 500N manufactured by Shimadzu Corporation.
Klemm's water absorption was measured by cutting a sample to a size of 150 mm, immersing the 15 mm portion from the bottom in water for 10 minutes, and measuring the height of water absorbed by the sample by capillary action.

As a result of the experiment, as shown in Table 1, the kitchen towel of this embodiment is superior to Comparative Example 1 in terms of strength (wet tensile strength), and is significantly superior to Comparative Example 1 in terms of water absorption performance (Klemm water absorption). is open. As a result, the effects described in the above [Detailed Description of the Invention] were verified.

11 Kitchen towel 31 Towel roll 31a Towel sheet 31A, 31B, 31C Towel paper 32 Perforation 33 Emboss 34 Concave portion 35 Convex portion 36 Joint portion 37 Nested emboss 38 Glue 38a Glue 39 Gap 40 Second gap 51 Core C1 Towel Roll (Comparative Example 1)
C2 towel roll (comparative example 2)

Claims (9)

Three sheets of towel paper with unevenness on the front and back sides,
a connecting part that connects the three sheets of towel paper in a stacked state by fitting a convex part into a concave part provided on the front and back surfaces;
a core formed by winding the three overlapping sheets of towel paper into a roll;
Equipped with
Two of the three sheets of towel paper are temporarily bonded by nested embossing ,
These two sheets of the towel paper and the remaining sheet of the towel paper are joined by glue provided at the facing portion of the concave portion and the convex portion,
There is a gap between the convex part of the two temporarily joined towel papers and the concave part of the remaining towel paper, which is larger than the inclination angle of the convex part with respect to the two towel papers. Also, there is provided a gap formed by the inclination angle of the recessed portion being gentler than the remaining sheet of towel paper,
The nested embossing temporarily connects the two sheets of towel paper by fitting the concave portion and the convex portion into each other.
kitchen towel. The glue exuding from the intermediate towel paper facing the remaining towel paper is provided between the temporarily joined portions of the two towel papers.
The kitchen towel according to claim 1. Klemm water absorption when the three stacked towel papers are immersed in fresh water is 110 mm or more;
The kitchen towel according to claim 1 or 2. The Klemm water absorption when the three stacked towel papers are immersed in a solution of 10% sugar dissolved in fresh water is 100 mm or more.
The kitchen towel according to any one of claims 1 to 3. The Klemm water absorption when the three stacked towel papers are immersed in a solution of 10% common salt dissolved in fresh water is 100 mm or more.
The kitchen towel according to any one of claims 1 to 3. Klemm water absorption when the three stacked towel papers are immersed in tempura oil is 40 mm or more;
The kitchen towel according to any one of claims 1 to 3. The length of the towel paper wrapped around the core is 10 to 65 m.
The kitchen towel according to any one of claims 1 to 6. The roll diameter of the towel paper is 85 to 150 mm.
The kitchen towel according to claim 7. The apparent basis weight of the core is 120 to 550 g/m ² ,
The kitchen towel according to any one of claims 1 to 8.

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