KR102014909B1 - Wet wipe and packaging for wet wipe - Google Patents

Abstract

An object of this disclosure is to provide the wet wipe which can be easily taken out one by one. The wet wipe of the present disclosure has the following configuration. In the wet wipe 105 including the nonwoven fabric 23 produced by the wet method and the chemical liquid impregnated in the nonwoven fabric 23, the nonwoven fabric 23 has a specific gravity of 5 to 40% by mass of the nonwoven fabric 23. Synthetic fiber which is more than 1.0, 60-95 mass% of cellulose fiber of the nonwoven fabric 23, and the said synthetic fiber has the cross-sectional shape of mold release of 20-100 mass% of the said synthetic fiber. The wet wipe 105 is characterized by including (1).

Description

WET WIPE AND PACKAGING FOR WET WIPE}

The present invention relates to a wet wipe and a package of the wet wipe.

By the wet method, it is attempted to manufacture a bulky nonwoven fabric. For example, Patent Document 1 aims to obtain a nonwoven fabric having high strength, bulkiness, and flexibility, and is supplied with a papermaking raw material containing water on a support, and a paper layer on the support. And a step of injecting high pressure water vapor into the paper layer by using a steam nozzle, and a step of injecting high pressure water vapor into the paper layer comprises, after setting the moisture content of the paper layer to 10 to 45%. A method for producing a nonwoven fabric is disclosed which injects high pressure steam onto the paper layer.

In addition, Patent Document 2 is a step of providing a nonwoven fabric having high strength, bulkiness, and flexibility, and supplying a papermaking raw material containing water on a support to form a paper layer on the support. And spraying high pressure water flow onto the paper layer from the high pressure water flow nozzle provided on the support, and spraying high pressure water vapor onto the paper layer spraying the high pressure water flow from the steam nozzle provided on the support. The manufacturing method of the nonwoven fabric which includes the process and the process of drying the paper layer which sprayed the said high pressure steam are described.

Japanese Unexamined Patent Publication No. 2012-202004 Japanese Unexamined Patent Application Publication No. 2012-202011

Although the nonwoven fabric manufactured by patent document 1 and patent document 2 is a thing with high intensity | strength, bulkiness, and flexibility, in the package of wet wipes, especially the package of pop-up wet wipes, it depends on a use condition. The wet wipes are connected to each other by a water film of a chemical liquid, and a plurality of wet wipes may be taken out from the packaging body at one time, leaving room for improvement.

Therefore, an object of this disclosure is to provide the wet wipe which can be easily taken out one by one.

The present inventors, in a wet wipe comprising a nonwoven fabric produced by a wet method and a chemical solution impregnated in the nonwoven fabric, the nonwoven fabric is 5 to 40% by mass of the nonwoven fabric, the specific gravity of more than 1.0, and It contains 60-95 mass% of cellulose fiber of the said nonwoven fabric, and the said synthetic fiber contains the synthetic fiber which has 20-100 mass% of a release cross-sectional shape of the said synthetic fiber. Found a wet wipe.

The wet wipe of this indication can be easily taken out one by one.

1: is a figure which shows the example of the cross-sectional shape of mold release of the synthetic fiber which has a cross-sectional shape of mold release.
It is a figure which shows the other example of the cross-sectional shape of mold release of the synthetic fiber which has a cross-sectional shape of mold release.
3 is a diagram for explaining the cross-sectional shape.
4 is a schematic view of a nonwoven fabric manufacturing apparatus for producing a nonwoven fabric.
5 is a diagram illustrating an example of a high pressure water flow nozzle.
6 is a diagram illustrating an example of a steam nozzle.
7 is a perspective view of a package of a wet wipe according to one of the embodiments of the present disclosure.
FIG. 8 is a cross-sectional view taken along line AA of the package 101 of the wet wipe shown in FIG. 7.
FIG. 9: is a figure for demonstrating the some wet wipe accommodated in the package of the wet wipe shown in FIG.
10 is a cross-sectional view of a package of a wet wipe according to another embodiment of the present disclosure.
11 is a cross-sectional view of a package of wet wipes according to still another embodiment of the present disclosure.

Hereinafter, the wet wipe of this indication is demonstrated in detail below.

The wet wipe of this disclosure contains the nonwoven fabric manufactured by the wet method, and the chemical liquid impregnated in the said nonwoven fabric.

The nonwoven fabric produced by the wet method comprises about 5 to about 40 mass% of the nonwoven fabric, synthetic fibers having a specific gravity greater than 1.0, and about 60 to about 95 mass% of cellulose fibers of the nonwoven fabric.

Moreover, the said synthetic fiber contains the synthetic fiber which has a cross-sectional shape of mold release of about 20 to about 100 mass% of the said synthetic fiber.

In this specification, "cross-sectional shape of mold release" means cross-sectional shape other than substantially circular.

As the cross-sectional shape of the mold release, a cross-sectional shape having at least one concave portion is preferable, and it is more preferable that the cross-sectional shape is made of a substantially polygon and that the at least one side of the approximately polygon is recessed. It is more preferable that the cross-sectional shape is made and all sides of the substantially polygon are recessed.

In addition, in this specification, "synthetic fiber which has a cross-sectional shape of mold release" may be abbreviated as a mold release cross-section synthetic fiber, and "mold cross-sectional shape" may be abbreviated as a mold release cross section.

Examples of the polygon include an n-square (n is an integer of 3 or more, for example, an integer of 3 to 12), for example, an approximately triangular, an approximately square, an approximately pentagon, an approximately hexagon, an approximately hexagon, and an octagon. .

(A)-(d) is a figure which shows the example of the mold release cross section of a mold release cross section synthetic fiber. The release cross-section synthetic fiber 1 shown to Fig.1 (a) has a substantially triangular shape, and has the cross-sectional shape in which all three sides are recessed. More specifically, the release cross-section synthetic fiber 1 shown in Fig. 1A includes three protrusions 3 (3 ', 3' 'and 3' '') and two adjacent protrusions ( It has a cross-sectional shape which has a total of three recesses 2 (2 ', 2 ", and 2'") formed between 3).

The release cross-section synthetic fiber 1 shown to Fig.1 (b) has a substantially rectangular shape, and has a cross-sectional shape in which all four sides are recessed. More specifically, the release cross-section synthetic fiber 1 shown in Fig. 1B includes four protrusions 3 (3 ', 3' ', 3' '' and 3 '' ''), It has the cross-sectional shape which has a total of four recessed parts 2 (2 ', 2 ", 2'", and 2 "") formed between two adjacent protrusion parts 3. As shown in FIG.

In addition, the cross section of the release cross section synthetic fiber 1 shown to Fig.1 (b) is also called a cross section.

The release cross-section synthetic fiber 1 shown to Fig.1 (c) has a substantially pentagon-shaped shape, and has a cross-sectional shape in which all five sides are recessed. More specifically, the release cross-section synthetic fiber 1 shown in (c) of FIG. 1 includes five protrusions 3 (3 ', 3', 3 '', 3 '' and 3 '). '' '' And a total of five recesses 2 (2 ', 2' ', 2' '', 2 '' '' and 2 '' formed between two adjacent protrusions 3). '' ') Has a cross-sectional shape.

In addition, the cross section of the release cross section synthetic fiber 1 shown to Fig.1 (c) is also called a star cross section.

The release cross-section synthetic fiber 1 shown to Fig.1 (d) has a substantially hexagonal shape, and has a cross-sectional shape in which all six sides are recessed. More specifically, the release cross-section synthetic fiber 1 shown in Fig. 1 (d) has six protrusions 3 (3 ', 3', 3 '', 3 '', 3 '). '' '' And 3 '' '' '') and a total of six concave portions 2 (2 ', 2', 2 '' ', 2 formed between two adjacent protrusions 3). '' '', 2 '' '' 'and 2' '' '' ').

In addition, the cross section of the release cross section synthetic fiber 1 shown to Fig.1 (d) is also called a star cross section.

In addition, although the example of the cross section in which all sides were recessed in the release cross section synthetic fiber was shown in (a)-(d) of FIG. 1, in the wet wipe which concerns on other embodiment of this indication, the release cross section synthetic fiber At least one side constituting the cross section of does not have to have a concave portion.

For example, in the release cross-section synthetic fiber 1 shown to Fig.1 (b), at least 1 of the four sides which form a substantially square does not need to have a recessed part, ie, four recessed parts 2 ', 2 '', 2 '' 'and 2' '' 'do not need to have at least one recess.

(A)-(c) is a figure which shows another example of the mold release cross section in a mold release cross section synthetic fiber. The release cross-section synthetic fiber 1 shown to Fig.2 (a) has a substantially C-shaped cross-sectional shape, and has one recessed part 2 and two protrusion parts 3, respectively.

The release cross-section synthetic fiber 1 shown to FIG. 2B has a substantially V-shaped cross-sectional shape, and has one recessed part 2 and two protrusion parts 3.

The release cross-section synthetic fiber 1 shown to Fig.2 (c) has a substantially W-shaped cross-sectional shape, and has three recessed parts 2 and two protrusion parts 3, respectively.

As shown in Fig. 1 and Fig. 2, since the cross-sectional synthetic fibers can hold a chemical liquid containing water having a high surface tension, such as in the concave portion of the cross section, wet wipes are connected by a water film of the chemical liquid. It is difficult, and it can take out easily one by one, and taking out is easy.

In addition, even when a large amount of chemical liquid is held in the wet wipes, the wet wipes have a high volume for holding the chemical liquid containing water having high surface tension in the concave portion of the cross-section, etc. It is hard to be connected by the film of water, and high chemical liquid concentration and ease of taking out are compatible.

In addition, since the release cross-section synthetic fiber is higher in rigidity than a general synthetic fiber having the same fineness, for example, a synthetic fiber having a substantially circular cross-sectional shape, the nonwoven fabric containing the release cross-section synthetic fiber, Even when the chemical liquid is impregnated, the volume tends to be difficult to be crushed. Therefore, wet wipes are difficult to be connected to each other by the water film of the chemical liquid, since the high-pressure water flow, the groin portion of the nonwoven fabric formed by the high-pressure steam, etc. can maintain the volume even after impregnating the chemical liquid and can keep the chemical liquid. Thereby, the phenomenon that a plurality of wet wipes are taken out at once from the packaging body is reduced.

Moreover, the cross section of a mold release cross section synthetic fiber can be prescribed | regulated by a degree of mold release when the inscribed circle and the circumscribed circle can be assumed.

The degree of release is based on the radius of the inscribed circle r _IC of the cross section and the radius of the circumscribed circle r _CC of the cross section, and

Release degree = r _CC / r _IC

Can be defined by

In the wet wipe according to one of the embodiments of the present disclosure, the degree of release is preferably in the range of about 1.2 to about 10.0, more preferably in the range of about 1.4 to about 8.0, and about 1.6 to about 6.0. It is more preferably in the range, and more preferably in the range of about 1.7 to about 5.0, and still more preferably in the range of about 1.8 to about 4.0.

In addition, synthetic fibers that do not have the cross-sectional shape of the mold release described above may have a degree of release of about 1.0 to about 1.2.

The larger the mold release degree, the larger the volume that can hold the chemical liquid containing water having a high surface tension, but the larger the mold release degree, the thinner and weaker the outer edge portion of the cross section of the fiber may be. It is desirable to stay within.

Further, in the circumscribed circle and the radius of, (a) ~ (d) of Figure 3, respectively, it is denoted as CC and r _CC, the inscribed circle and its radius, as, respectively, are shown as IC and r _IC.

In the wet wipe of the present disclosure, the release cross-section synthetic fiber has a cross-sectional shape having three protrusions and three concave portions, as shown in Fig. 1 (a), or shown in Fig. 1 (b). It is preferable to have a cross-sectional shape having four protrusions and four concave portions as losing, and to have a cross-sectional shape having four protrusions and four concave portions, as shown in Fig. 1B. More preferred.

In addition to the release cross-section synthetic fiber, the synthetic fiber may include a synthetic fiber having no cross-sectional shape of the release, for example, a synthetic fiber having a substantially circular cross-sectional shape.

The synthetic fiber which does not have the cross-sectional shape of the mold release can be entangled with other synthetic fibers or other cellulosic fibers to impart strength, in particular, wet strength, to the wet wipe of the present disclosure.

Examples of the synthetic fibers include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate (PET), polyamides such as nylon, and the like. As said synthetic fiber, polyethylene terephthalate is preferable from a viewpoint of the stability of papermaking.

Preferably, the synthetic fibers have a fineness of about 0.5 to about 3.0 dtex. In addition, the synthetic fibers preferably have a fiber length of about 3 to about 15 mm. In view of the stability of the papermaking and the strength of the wet wipes formed, in particular the wet strength.

The synthetic fibers have a specific gravity of greater than about 1.0. Since the nonwoven fabric which comprises the wet wipe of this indication is manufactured by the wet method, when synthetic fiber has a specific gravity of about 1.0 or less, it becomes difficult for synthetic fiber to float in water and form a homogeneous web.

In addition, the synthetic fiber has no upper limit on the specific gravity from the viewpoint of the wet method, and considering the specific gravity of the general synthetic fiber used for the wet wipe, the upper limit will be about 1.5.

The said synthetic fiber, especially the release cross-section synthetic fiber, may be a synthetic fiber hydrophilized. It is because it becomes easier to hold | maintain the chemical liquid containing water with high surface tension to the recessed part of the cross section.

As said hydrophilization treatment, coating a hydrophilic agent on the surface of synthetic fiber, mixing a hydrophilic agent with synthetic resin which is a raw material of synthetic fiber, etc. are mentioned.

As said cellulose fiber, mercerization formed by chemical treatment of said wood pulp, such as a pulp, for example, chemical pulp, such as a coniferous tree and a hardwood, semichemical pulp, and a mechanical pulp. Non-wood fibers such as pulp and crosslinked pulp, ramie, cotton, and regenerated cellulose fibers such as rayon such as viscose rayon and copper ammonia rayon.

As said cellulose fiber, the combination of a pulp and a rayon is preferable from a viewpoint of the strength of wet wipe formed, especially wet strength and a touch, and cost.

Moreover, it is preferable that the said cellulose fiber has specific gravity more than about 1.0 from a viewpoint of manufacturing the nonwoven fabric which comprises a wet wipe by the wet method.

The nonwoven fabric constituting the wet wipe of the present disclosure includes synthetic fibers having a specific gravity greater than 1.0 of about 5 to about 40 mass% of the nonwoven fabric, and about 60 to about 95 mass% of cellulose fibers of the nonwoven fabric, Preferably, about 5% to about 30% by weight of the nonwoven fabric comprises synthetic fibers having a specific gravity greater than 1.0, and about 70% to about 95% by weight of cellulose fibers of the nonwoven fabric, and more preferably the nonwoven fabric About 5% to about 20% by weight of synthetic fibers having a specific gravity greater than 1.0 and about 80% to about 95% by weight of cellulose fibers of the nonwoven fabric. This is true in view of the strength of the wet wipe being formed, in particular the wet strength.

In the nonwoven fabric constituting the wet wipe of the present disclosure, the synthetic fibers include about 20 to about 100 mass% of the release cross-section synthetic fibers of the synthetic fiber, and preferably about 30 to about 90 mass% of the release cross-section synthetic Fiber, and more preferably about 40 to about 80 mass% of the release cross-section synthetic fiber. Since the quantity of a mold release cross-section synthetic fiber exists in the said range, a wet wipe can be easily taken out one by one especially in the package of a wet wipe of a pop-up type | mold.

In addition, in this specification, the "popup type" regarding the package of a wet wipe means that a wet wipe can be taken out sequentially from the package of a wet wipe. More specifically, when a certain wet wipe is taken out, it means that a part of the next wet wipe protrudes from the opening of the package of the wet wipe.

The nonwoven fabric constituting the wet wipe of the present disclosure has a release cross-sectional synthetic fiber having a specific gravity greater than 1.0 of about 1 to about 20 mass% of the nonwoven fabric, and a cross-sectional shape of a release of about 1 to about 20 mass% of the nonwoven fabric. It is preferable to include a synthetic fiber that does not have a fiber, about 10 to about 40 mass% of rayon of the nonwoven fabric, and about 50 to about 85 mass% of pulp of the nonwoven fabric, and about 2 to about 15 mass% of the nonwoven fabric. The release cross-section synthetic fiber having a specific gravity of more than 1.0, the synthetic fiber having no cross-sectional shape of the release of about 2% to about 15% by mass of the nonwoven fabric, the rayon of about 15% to about 30% by mass of the nonwoven fabric, More preferably, about 55% to about 80% by mass of the nonwoven fabric is included, and about 3% to about 10% by mass of the nonwoven fabric has a specific cross-sectional synthetic fiber having a specific gravity greater than 1.0, and about 3% to about 3% of the nonwoven fabric. Synthetic fiber having no cross-sectional shape of mold release of about 10 mass% More preferably about 15% to about 25% by weight of rayon of the nonwoven fabric and about 55% to about 79% by weight of pulp of the nonwoven fabric.

Since the nonwoven fabric has the above-described configuration, the wet wipes formed can be easily taken out one by one, and the wet wipes formed are excellent in strength, in particular, wet strength.

The chemical liquid to be impregnated into the nonwoven fabric is not particularly limited, and examples thereof include a mixture of preservatives such as distilled water, propylene glycol, and parabens.

The wet wipe of this disclosure contains the said chemical liquid per 100 mass parts of nonwoven fabrics, Preferably it is about 180-400 mass parts. In view of wet wipe removal of dirt and moisture retention to an object (eg, skin) that removes dirt.

Moreover, in order to make a large amount of chemical | medical solution hold | maintain in a wet wipe in order to make high chemical | medical solution density | concentration compatible with ease of taking out, the wet wipe of this indication will contain about 300-400 mass parts of said chemical liquids per 100 mass parts of nonwoven fabrics. It can be included as.

The nonwoven fabric which comprises the wet wipe of this indication is not specifically limited except adjusting the fiber which comprises the said nonwoven fabric to a predetermined range, For example, it manufactures according to the method of patent document 1 and patent document 2 can do.

Hereinafter, an example of the manufacturing method of the nonwoven fabric which comprises the wet wipe of this indication is shown.

4 is a schematic view of a nonwoven fabric manufacturing apparatus 11 for producing the nonwoven fabric.

The papermaking raw material containing synthetic fiber and cellulose fiber is supplied from the raw material supply head 12 on the support body of the web formation conveyor 13, and the web 14 is formed on the support body. It is preferable that a support body has the air permeability which a vapor | steam can pass, for example, a wire mesh, a blanket, etc. are mentioned.

The web 14 formed on the support body is appropriately dewatered by the suction box 15. The web 14 includes two high pressure flow nozzles 16 disposed on the upper surface of the web 14 and a high pressure flow nozzle disposed at a position opposite the high pressure flow nozzle 16 with the web 14 therebetween. It passes between two suction boxes 15 which collect | recover water sprayed from (16). At this time, the groove | channel 14 is formed in the upper surface (surface of the high pressure water flow nozzle 16 side) by the high pressure water flow injected from the high pressure water flow nozzle 16 at this time.

An example of the high pressure water flow nozzle 16 is shown in FIG. From the high pressure water flow nozzle 16, a plurality of high pressure water flows 31 arranged side by side in the width direction CD of the web 14 are injected toward the web 14. As a result, a plurality of grooves 32 are formed on the upper surface of the web 14 side by side in the width direction of the web 14 and extend in the machine direction MD. In addition, by injecting the high pressure water flow 31 into the web 14, the fibers of the web 14 are entangled.

Then, as shown in FIG. 4, the web 14 is transferred to the web conveyance conveyor 18, and then the web 14 is transferred to the web conveyance conveyor 19. Then, the web 14 is transferred to the drying drier 20. As a drying dryer 20, a Yankee dryer is mentioned, for example, The web 14 is affixed to the drum heated at about 120 degreeC with steam, and is dried.

It is preferable to adjust the water content of the web 14 to about 10 to about 45 mass% by drying with the drying dryer 20, and it is more preferable to adjust to about 20 to about 40 mass%. In this specification, moisture content is a percentage of water with respect to the total mass of the web containing water. When the water content of the web is lower than 10% by mass, the hydrogen bonding force between the fibers of the web becomes strong, and the energy required for unwinding the fibers of the web by the high pressure steam described later becomes very high. On the other hand, when the moisture content of the web becomes higher than 45 mass%, the energy required in order to dry a web below a predetermined moisture content by the high pressure steam mentioned later becomes very high.

Next, the web 14 is moved onto the mesh outer circumferential surface of the cylindrical suction drum 21, and from the steam nozzle 22 disposed above the suction drum 21, high pressure steam Is sprayed on the web 14. By the high pressure steam injected from the steam nozzle 22, another groove portion is formed on the surface (side of the steam nozzle 22 side) of the web 14 on the same side as the surface on which the groove portion is formed by the high pressure water flow 31. And a nonwoven fabric 23 is formed.

An example of the steam nozzle 22 is shown in FIG. From the steam nozzle 22, a plurality of high pressure steam 41 arranged side by side in the width direction CD of the web 14 is injected toward the web 14. As a result, a plurality of grooves 42 extending in the machine direction MD are formed on the upper surface of the formed nonwoven fabric 23.

It is preferable that it is 45 mass% or less, and, as for the moisture content of the nonwoven fabric 23 after spraying high pressure steam, it is more preferable that it is 40 mass% or less. When the said moisture content is larger than 45 mass%, it may be difficult to make the moisture content of the nonwoven fabric 23 into 5 mass% or less by drying with the dry dryer mentioned later.

Next, as shown in FIG. 4, the nonwoven fabric 23 is transferred to the drying drier 24. As a drying dryer 24, a Yankee dryer is mentioned, for example, The nonwoven fabric 23 is affixed on the drum heated at about 150 degreeC by steam, and it is made to dry. It is preferable that the moisture content of the nonwoven fabric 23 after passing through the drying drier 24 is 5 mass% or less.

Next, the nonwoven fabric 23 is wound up by the winding machine 25.

Although the nonwoven fabric which comprises the wet wipe of this indication can be manufactured according to the method of patent document 1 and patent document 2 other than the method mentioned above, for example, refer to patent document 1 and patent document 2 for the detail. .

The nonwoven fabric constituting the wet wipe of the present disclosure may have a plurality of ridges and grooves derived from high pressure water flow, high pressure steam, and the like. By adjusting the surface for spraying the high pressure water flow and the high pressure steam, it is possible to form plural kinds of ridges and grooves having different pitches and heights on the same side of the nonwoven fabric, and ridges having different pitches and heights on different sides of the nonwoven fabric. And a groove portion can be formed.

Moreover, the nonwoven fabric which comprises the wet wipe of this indication can have a convex part and a recessed part derived from the shape of a support body.

The wet wipe of this disclosure can be manufactured by impregnating the chemical liquid in the nonwoven fabric which comprises a wet wipe.

FIG. 7: is a perspective view of the package of wet wipes which concerns on one of embodiment of this indication, and FIG. 8 is sectional drawing in the A-A line of the package 101 of the wet wipe shown in FIG.

In the package 101 of the wet wipe shown in FIG. 7, a plurality of wet wipes (not shown) include a top portion T having an opening 103 and a package body 102 having a bottom portion B. FIG. It is stored in the form which can be taken out one by one inside.

The packaging body 102 has a sealing material 104 covering the opening 103.

The packaging main body 102 has a bag shape, and when the opening 103 is sealed with the sealing material 104, the wet wipe inside the packaging main body 102 can be sealed, and the evaporation of the chemical is suppressed. Each wet wipe can be taken out through the opening part 103. In order for the sealing material 104 to seal the wet wipe inside the packaging main body 102 repeatedly, the adhesive is apply | coated to the surface which contact | connects the packaging main body 102. FIG.

As shown in FIG. 8, in the packaging main body 102, a plurality of wet wipes 105 are stacked in a direction from the top portion T to the bottom portion B. In addition, in FIG. 8, the some wet wipe 105 has a substantially Z-shaped folding structure.

FIG. 9: is a figure for demonstrating the some wet wipe accommodated in the package of the wet wipe shown in FIG.

In FIG. 9, in the relationship between the wet wipe 105 ′ and the wet wipe 105 ″, a part 105 of the wet wipe 105 ″ (bottom side wet wipe) located on the bottom B side is 105. '' T and a portion 105'B of the wet wipe 105 '(normal top wet wipe) adjacent to the top T side are the wet wipe 105' '(bottom side wet wipe). The portions 105 " T are superimposed on one another so as to be located at the top T side than the portion 105'B of the wet wipe 105 '(normal side wet wipe).

Similarly, in FIG. 9, in the relationship between the wet wipe 105 '' and the wet wipe 105 '' ', the wet wipe 105' '' (bottom side wet wipe) located on the bottom B side. A portion 105 '' 'T) and a portion 105''B of the wet wipe 105 " (top portion wet wipe) adjacent to the top portion T side thereof are wet wipes 105 ". '105' '' (bottom side wet wipe) portions 105 '' 'T are located on top T side than wet portion 105' '(top portion wet wipe) portion 105''B. It is stacked.

In the embodiment shown in FIG. 9, the bottom side end of the top side wet wipe of the bottom side wet wipe located in the bottom side, and the bottom side end of the top side wet wipe adjacent to the top side are the bottom side. The top side ends of the wet wipes are superimposed on each other such that they are located on the top side rather than the bottom side end of the top side wet wipes.

A plurality of wet wipes are stacked as shown in Figs. 8 and 9, so that when the wet wipe 105 'is taken out, a part of the wet wipe 105' '(mainly 105''T) is taken out. It protrudes from the packaging main body 102, and it becomes easy to take out the wet wipe 105 "at the next use.

Moreover, when the part 105'B of the wet wipe 105 'and the part 105 "T of the wet wipe 105" are connected by the chemical film of a chemical | medical solution, the wet wipe 105' is taken out. In this case, the entire wet wipe 105 '' may be taken out together (in some cases, the entire wet wipe 105 '' 'may be taken out together in some cases).

FIG. 10: is sectional drawing of the package of the wet wipe which concerns on other embodiment of this indication, and is sectional drawing corresponding to the A-A line of the package 101 of the wet wipe shown in FIG. In FIG. 10, the wet wipe 105 has a substantially C-type folded structure.

In the package 101 of the wet wipe shown in FIG. 10, similarly to FIG. 9, the top side end portion of the bottom side wet wipe positioned on the bottom side side, and the bottom portion of the top side wet wipe adjacent to the top side side thereof. The side ends are superposed on each other such that the top side end of the bottom side wet wipe is located on the top side rather than the bottom side end of the top side wet wipe.

FIG. 11: is sectional drawing of the package of the wet wipe which concerns on other embodiment of this indication, and is sectional drawing corresponding to the A-A line of the package 101 of the wet wipe shown in FIG. In FIG. 11, the wet wipe 105 has a substantially Z-shaped folding structure similarly to the embodiment shown in FIG. 8, but the plurality of wet wipes 105 are arranged in the reverse direction at a distance of one sheet and adjacent to each other. The wet wipe and the range to overlap are different from the embodiment shown in FIG.

The wet wipe package as shown in FIGS. 7-11 can be manufactured by the method known in the art, for example, the method of Unexamined-Japanese-Patent No. 2000-51118.

Example

EMBODIMENT OF THE INVENTION Below, although this invention is demonstrated in detail based on an Example, this invention is not limited by these Examples.

The measurement conditions of the item evaluated in the Example and the comparative example are as follows.

[Basic weight of nonwoven fabric]

Basis weight is measured according to 5.2 of JIS L 1906.

[Thickness of nonwoven fabric]

The volume is measured using THICKNESS GAUGE UF-60 manufactured by Daiei Scientific Precision Instruments, Ltd.

[Wet wipe test]

The nonwoven fabric is cut into a size of 190 x 135 mm (takeout direction x width direction), and a total of 60 sheets are laminated as shown in Fig. 8, and 60 laminates are packaged in a packaging body. Next, a pop-up wet wipe package is produced by impregnating the chemical liquid in the nonwoven fabric at a ratio of 250 parts by mass of the chemical liquid to 100 parts by mass of the nonwoven fabric and then sealing the packaging body.

In addition, the chemical liquid contains water, propylene glycol as a moisturizing agent, and a preservative.

The package of the pop-up wet wipe is set in the case of a commercially available wet wipe, and the wet wipe is taken out one by one.

When the n-th (1, 2, ..., n, ..., 60) wet wipe was taken out, the wet wipe (indirectly taken out) was pulled out by the n-th wet wipe (wet wipe taken out directly). The number of wet wipes) is counted.

For example, when the n-th wet wipe is taken out, when the (n + 1) -th wet wipe under 1 sheet is pulled out by the n-th wet wipe, and taken out together, the wet wipe taken out indirectly is taken out. Count one piece.

In addition, when the nth wet wipe was taken out, the (n + 1) th wet wipe under one sheet was drawn by the nth wet wipe and taken out together, and the (n + 2) th sheet under two sheets was taken out together. When the wet wipe of is taken out by the (n + 1) th wet wipe and taken out together, the wet wipe taken out indirectly is counted as two sheets.

The experiment is continued until all 60 wet wipes have been taken out, and the total number of sheets of wet wipes taken out indirectly (m) is counted.

Ease of extraction (%) is given by the following formula:

Ejectability (%) = 100 x (60-m) / 60

Calculate according to.

For example, when the total number of wet wipes taken out indirectly is 0, the ease of taking out is 100%, and when the total number of wet wipes taken out indirectly is 30 sheets (half of all wet wipes), Ease of extraction is 50%.

Example 1

71 mass% of conifer bleached kraft pulp (NBKP), 1.1 dtex of fineness, and 21 mass% of rayon (made by Daiwabo Rayon Co., Ltd.) whose fiber length is 7 mm, and 0.6 dtex of fineness, and fiber length of 10 The papermaking raw material containing 4 mass% of polyethylene terephthalate fibers of mm, and 4 mass% of polyethylene terephthalate fibers (The unit made by UNITIKA, Inc., brand name: X531) which has a cross section whose fineness is 2.2 dtex and a fiber length is 5 mm. In preparation, the nonwoven fabric 1 was manufactured using the nonwoven fabric manufacturing apparatus as shown in FIG.

The polyethylene terephthalate fiber had a radius (r _IC ) of the inscribed circle in the cross section of 8.9 μm, a radius r _CC of the circumscribed circle in the cross section of 17.1 μm, and a degree of release of 1.92.

Specifically, the papermaking raw material was supplied from the raw material supply head onto the support body (Nippon Filcon Co., Ltd. product OS80), and the papermaking raw material was dehydrated using the suction box, and the web was formed. The moisture content of the web was 80 mass%. Then, high pressure water flow was injected into the web from two high pressure water nozzles. The high-pressure water flow energy of the high-pressure water stream sprayed on the web using two high-pressure water flow nozzles was about 0.285 mW / m 2.

In addition, the high pressure water energy (kV / m 2) is represented by the following equation:

High pressure water flow energy (㎾ / ㎡)

= 1.63 x injection pressure (kg / cm 2) x injection flow rate (m 3 / min) / treatment time (m / min)

Calculated by

Moreover, the injection pressure (kg / cm <2>) is a following formula:

Injection pressure (㎏ / ㎠)

= 750 × orifice (orifice) through holes (開孔) Total area (㎡) × jetting pressure (㎏ / ㎠) ^{0 .495}

Calculated by

The distance between the tip of the high pressure water flow nozzle and the upper surface of the web was about 10 mm. Moreover, the hole diameter of the high pressure water flow nozzle was about 92 micrometers, and the hole pitch was about 0.5 mm.

After the web was transferred to two web conveying conveyors, the web was transferred to a Yankee dryer heated at 120 ° C. and dried.

Then, high pressure steam was sprayed on the web from one steam nozzle. The vapor pressure of the high pressure steam was about 0.7 MPa and the steam temperature was about 175 ° C. Moreover, the distance between the tip of a steam nozzle and the upper surface of the web was about 2 mm. Moreover, the hole diameter of the steam nozzle was about 300 micrometers, and the hole pitch was about 2.0 mm. Moreover, the suction force which a suction drum draws a web was about -1 kPa. A stainless steel 18 mesh opening sleeve was used for the outer circumference of the suction drum.

Then, the web was transferred to a Yankee dryer heated to 150 ° C. and dried to prepare Nonwoven Fabric 1. Nonwoven fabric 1 had a basis weight of 48 g / m 2 and a thickness of 0.318 mm.

In addition, in Example 1, the papermaking speed was about 70 m / min.

Subsequently, the package 1 of the pop-up wet wipe was manufactured from the nonwoven fabric 1, and when the above-mentioned extraction test was done, the ease of extraction (%) was 97%.

Comparative Example 1

71 mass% of conifer bleached kraft pulp (NBKP), 1.1 dtex of fineness, and 21 mass% of rayon (made by Daiwabo Rayon Co., Ltd.) whose fiber length is 7 mm, and 0.6 dtex of fineness, and fiber length of 10 The nonwoven fabric 2 was produced like Example 1 except having changed into the papermaking raw material containing 8 mass% of polyethylene terephthalate fibers of mm. Nonwoven fabric 2 had a basis weight of 48 g / m 2 and a thickness of 0.322 mm.

Moreover, when the extraction test was done like Example 1, the ease of extraction (%) was 80%.

The present disclosure relates to the following J1 to J12.

[J1]

In a wet wipe comprising a nonwoven fabric produced by a wet method and a chemical liquid impregnated in the nonwoven fabric,

The nonwoven fabric includes synthetic fibers having a specific gravity greater than 1.0 of 5 to 40% by mass of the nonwoven fabric, and 60 to 95% by mass of cellulose fibers of the nonwoven fabric, and

Said synthetic fiber contains the synthetic fiber which has a cross-sectional shape of mold release of 20-100 mass% of the said synthetic fiber, The said wet wipe characterized by the above-mentioned.

[J2]

The wet wipe according to J1, wherein the synthetic fiber having a cross-sectional shape of the mold release has a cross-sectional shape having at least one concave portion.

[J3]

The wet wipe according to J1 or J2, wherein the synthetic fiber having a cross-sectional shape of the mold release has a cross-sectional shape formed of a substantially polygon and in which at least one side of the approximately polygon is recessed.

[J4]

Synthetic fiber which has the said cross-sectional shape of the mold release is any one of J1-J3 which has a cross-sectional shape which is selected from the group which consists of a substantially triangular shape, a substantially square shape, a substantially pentagon shape, and a substantially hexagon shape, and all the sides are recessed. Wet wipes.

[J5]

The wet wipe according to J1 or J2, wherein the synthetic fiber having a cross-sectional shape of the mold release has a cross-sectional shape selected from the group consisting of approximately C-type, approximately V-type, and approximately W-type.

[J6]

The wet wipe according to any one of J1 to J5, wherein the synthetic fiber having a cross-sectional shape of the mold release is a polyethylene terephthalate fiber.

[J7]

The wet wipe according to any one of J1 to J6, wherein the synthetic fiber having a cross-sectional shape of the mold release is hydrophilized.

[J8]

The wet wipe according to any one of J1 to J7, wherein the cellulose fiber includes pulp and regenerated cellulose fibers.

[J9]

The wet wipe according to any one of J1 to J8, wherein the chemical liquid is contained at a ratio of 300 to 400 parts by mass per 100 parts by mass of the nonwoven fabric.

[J10]

The said nonwoven fabric has a synthetic fiber which has a cross-sectional shape of mold release of 1-20 mass% of the said nonwoven fabric, specific gravity is more than 1.0, The synthetic fiber which does not have a cross-sectional shape of mold release of 1-20 mass% of the said nonwoven fabric, and The wet wipe according to any one of J1 to J9, comprising 10 to 40% by mass of rayon of the nonwoven fabric and 40 to about 88 mass of pulp of the nonwoven fabric.

[J11]

In the package of the wet wipe, in which the plurality of wet wipes are accommodated in a form that can be taken out sequentially, inside the top portion having an opening and the packaging body having the bottom portion,

The plurality of wet wipes according to any one of J1 to J10 is laminated in the direction from the bottom to the top,

A portion of the bottom side wet wipe positioned on the bottom side, and a portion of the top side wet wipe adjacent to the top side, and a portion of the bottom side wet wipe are more than the portion of the top side wet wipe, The package is characterized in that it is superimposed on each other to be located on.

[J12]

The package according to J11, wherein the plurality of wet wipes have a Z-shaped folded structure.

1: synthetic fiber having a cross-sectional shape of a release (release cross-section synthetic fiber)
2: recess 3: protrusion
11: nonwoven fabric manufacturing device 12: raw material feeding head
13: Web Forming Conveyor 14: Web
15: suction box 16: high pressure water flow nozzle
18, 19: web conveying conveyor 20, 24: drying dryer
21: suction drum 22: steam nozzle
23: nonwoven fabric 25: winding machine
31: high pressure water flow 32: groove
41: high pressure steam 42: groove
101: package of wet wipe 102: package body
103: opening 104: sealing material
105: wet wipe

Claims (12)

A wet wipe housed in a pop-up package and used, the wet wipe comprising a nonwoven fabric produced by a wet method and a chemical liquid impregnated in the nonwoven fabric.
The nonwoven fabric has a plurality of ridges and grooves having different pitches and heights on the same side of the nonwoven fabric,
The nonwoven fabric includes synthetic fibers having a specific gravity greater than 1.0 of 5 to 40% by mass of the nonwoven fabric, and 60 to 95% by mass of cellulose fibers of the nonwoven fabric, and
The said synthetic fiber contains the synthetic fiber which has a cross-sectional shape of mold release of 20-100 mass% of the said synthetic fiber,
The said wet wipe characterized by the synthetic fiber which has the cross-sectional shape of the mold release having a cross-sectional shape which consists of a polygon and in which at least 1 side of the said polygon is recessed. The method of claim 1,
A wet wipe, wherein the synthetic fiber having a cross-sectional shape of the mold release has a cross-sectional shape selected from the group consisting of triangles, squares, pentagons, and hexagons and in which all sides are recessed. The method of claim 1,
The wet wipe which has the cross-sectional shape chosen from the group which the said synthetic fiber which has the cross-sectional shape of the mold release consists of C type, V type, and W type. The method according to any one of claims 1 to 3,
The wet wipe, wherein the synthetic fiber having a cross-sectional shape of the mold release is a polyethylene terephthalate fiber. The method according to any one of claims 1 to 3,
The wet wipe in which the synthetic fiber which has the cross-sectional shape of the mold release is hydrophilized. The method according to any one of claims 1 to 3,
The wet wipe, wherein the cellulose fibers include pulp and regenerated cellulose fibers. The method according to any one of claims 1 to 3,
The wet wipe which contains the said chemical liquid in the ratio of 300-400 mass parts per 100 mass parts of said nonwoven fabrics. The method according to any one of claims 1 to 3,
The said nonwoven fabric has a synthetic fiber which has a cross-sectional shape of mold release of 1-20 mass% of the said nonwoven fabric, specific gravity is more than 1.0, The synthetic fiber which does not have a cross-sectional shape of mold release of 1-20 mass% of the said nonwoven fabric, and The wet wipe which contains 10-40 mass% of rayon of the said nonwoven fabric, and the 40-88 mass pulp of the said nonwoven fabric. In the package of the wet wipe, in which the plurality of wet wipes are accommodated in a form that can be taken out sequentially, inside the top portion having an opening and the packaging body having the bottom portion,
The plurality of wet wipes according to any one of claims 1 to 3 are laminated in a direction from the bottom to the top,
A portion of the bottom side wet wipe positioned on the bottom side, and a portion of the top side wet wipe adjacent to the top side, and a portion of the bottom side wet wipe are more than the portion of the top side wet wipe, The package is characterized in that it is superimposed on each other to be located on. The method of claim 9,
The said plurality of wet wipes have a Z-shaped folding structure. delete delete

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