KR20010012777A - Folding and stacking configuration for wet wipes - Google Patents

Abstract

The present invention relates to wet wipes for use in cleaning surfaces in homes and industries, in addition to use in the body, such as cosmetic removal with baby wipes, and other skin protection applications. The wet wipes 1 are folded and fitted together to provide an improved laminate structure, whereby each wipe can be easily separated one by one from the wet wipe stack 23 by the consumer.

Description

FOLDING AND STACKING CONFIGURATION FOR WET WIPES}

Wet wipes are disposable small paper towels, typically pre-moisture, that can be used in a variety of applications in the home and industry and perform a variety of functions. Wet wipes are typically used to clean living and inanimate surfaces and can provide numerous benefits, such as cleaning, cleansing, disinfectant disinfection, and skin protection benefits.

One particular application uses wet wipes to wipe portions of the body, especially when wash water is unavailable, for example when traveling. Wipe materials are personal hygiene wipes, such as, for example, wet wipes for women, and are commonly used for body cleansing and wiping, such as cleansing the anus, perineum, genital cleansing, and facial and hand cleansing. Wet wipes can also be used to apply substances to the body, including removing and applying makeup, skin conditioners, and medications. Another application of the wiping material is when treating dermatitis in adults and babies partially caused by the change of diapers and / or the use of diapers and incontinence devices. In addition, wet wipes can be used to apply synthetic chemicals to wipe or clean other surfaces, or to, for example, kitchen and bathroom surfaces, eyeglass surfaces, sneaker surfaces, and surfaces that require cleaning, for example in the machinery or automotive industry. It can also be applied. Wet wipes also relate to articles used for washing or grooming of pets.

Wet wipes generally consist of a combination of synthetic and natural fibers, such as polyolefin fibers, viscose fibers, and cotton yarns, which generally include some of other surfactants, preservatives, oils, and fragrances. Wet with an aqueous mixture. Thus, the wet wipes are typically provided in a stacked and folded structure in a lid-covered container, such as a tub-like container with a lid. Alternatively, the wiping material may be provided in a keg container having a dispensing hole. In both cases, this allows for easy movement and storage of the wiping material.

However, a problem with the current stack of wet wipes that is folded is that it is difficult to dispense one wipe from the wet wipe stack. This problem is particularly acute in the use environment, such as when the consumer is holding the baby during the exchange of diapers. Under these conditions, the consumer should be able to pick up and separate the wipe from the laminate using only one hand. This is not satisfactorily achieved with current articles.

The problem of not being able to satisfactorily dispense wet wipes from lamination and containers is due to many reasons. First, the wet wipes are typically folded so that one is placed on top of the other or sandwiched in adjacent wipes. However, the exact position of the leading edge of the current laminated top wipe cannot be easily distinguished visually or tactilely. This is because the substrate material of the wiping material is typically homogeneous, and therefore the front edge of the wiping material, in particular when folded, is indistinguishable from the rested wiping substrate material. In addition, the front edge portion of the wiping material also has a tendency to stick to the floor wiping substrate material to be seated. Therefore, even the tactile identification of the edges by the action or dragging of a finger across the wiping material surface does not immediately identify the position of the edges.

Secondly, once the front edge is found, it is difficult for the consumer to grasp and hold the substrate material in order to separate one wipe from the seated stack. Since the consumer can only dig a small portion of the front edge, often no firm grip is taken, so that the wiping material slides easily from the finger of the consumer.

These problems with the distribution of wet wipes have been recognized in the art. For example, US Pat. No. US 5 540 332 addresses the dispensability of wet wipes and methods of producing these wipes. The improved dispensability is achieved by providing a repeating non-linear pattern, such as a sinusoidal wave, at a portion of the minimum end edge of the wipe. However, the problem of one wet wipe distribution is not addressed or overcome by the use of nonlinear front edges.

Another proposed solution to the dispensing problem is described in US Pat. No. 4,778,048, which discloses an article that includes an improved access, dispensing, and stacking of wet wipes with a slanted edge in a container for even liquid dispensing. It is. In a preferred embodiment, the edge of each wipe has a Gurley Stiffness greater than the stiffness of the wipe main body. However, the provision of the rigid edges by itself has the disadvantage that wet wipes are undesirable. They are intended for use in sensitive areas of the skin, such as wet wipes, especially baby wipes, and require some softness. The hardened edges of the wiping material are no longer suitable for applications actually recognized in the patent itself, and therefore the wiping material has a reduced substrate surface suitable for use. In addition, it is necessary to take measures to reduce or avoid contact of the edges with the skin since the edges can cause irritation. In addition, the edge stiffness also never solves one wipe distribution problem. In addition, the provision of the non-linear edges to nonwoven substrates using current fabrication techniques will also result in very undesirable fraying of the substrate edges.

Alternatively, it has also been proposed to provide a specially designed dispensing container with dispensing orifices to assist the identification of the front edge by the consumer. During removal of the top wiping material from the container, these containers are designed so that the adjacent wiping material is lifted from the stack so that once the top wiping material is pulled out, it partially projects through the hole. In this manner, the top wipe is positioned to be easily held by the consumer. However, a disadvantage of the device is that too much substrate material of adjacent wipes is exposed through the holes. Therefore, the wipe should be dried and unsuitable for use. EP 747 313 proposes a means of dealing with the problem and discloses a multifolded toilet paper, such as a wet tissue (toilet paper), for continuous processing through the container openings. In this manner, up to one quarter of adjacent wipes are exposed through the dispensing holes. However, since the wet toilet paper is not satisfactory for its softness or strength, the toilet paper article cannot be used for the application of all-wet wipes, such as baby wipes. In particular, the wet tissues are not suitable for use as wet wipes because they tend to tear during use.

Another solution contributing factor to one wet wipe distribution problem from a wet wipe stack not covered by any of the prior art is the tendency of the wipe substrate material to stick to itself. In particular, this is due to the compression of the wipe stack during manufacture and storage, the actual weight of the wipe stack itself, and the substance of attraction between the substrate material and the wipe wash water. As a result, when the wipe material is folded to form a laminate, the substrate material tends to stick to itself and to the substrate material of the adjacent wipe material. Thus, once the consumer has lifted the wipe from the stack, the wipe has a tendency to maintain its folded shape. In addition, the wiping material is at least partially stuck to adjacent wiping materials that are typically seated. Therefore, furthermore, during removal of the wiping material from the lamination, the adjacent wiping material is also at least partially separated from the lamination. As a result, the consumer is required to not only spread the wiping material before starting the desired application of the wiping material, but also to separate the wiping material from the adjacent wiping material in the stack and to put the adjacent wiping material back into the stack in the container. This is particularly clearly uncomfortable for consumers who use baby wipes during diaper change.

The problem of adhesion of substrate wipes has been recognized in the prior art. Attempts have been made to solve this problem, for example, in providing an embedded wiping material described in, for example, Japanese Patent No. JP 08 089 439. In practice, embedding is also known in the prior art for dry tissue articles such as those disclosed in US Pat. Nos. US 2 772 021 and US 3 330 553. However, due to the complex interactions present between the substrate material and the wash water in the wet wipes article, it is known that a folding structure that can be generally used in the dry tissue article cannot be applied again to the wet wipes.

Moreover, many of the proposed embedding structures have problems in this regard. In particular, when the degree of overlap of substrate materials between adjacent wipes is large as a result of embedding, the problem of substrate stickiness is therefore only exacerbated so that the wipes are virtually always unpaired, or even if the wipes are distributed one by one, A large portion of adjacent wiping material may still be exposed through the dispensing hole even after removal of the top wiping material, as a result of which the wiping material dries. On the other hand, if the overlap between adjacent wipes is minimized so that one wipe distribution is ensured, the separation of adjacent wipes from the stack cannot be recognized and the problem of identification of the front edges again occurs.

Moreover, in addition to unsatisfactory distribution of the wiping material, another problem also arises with the proposed prior art embedding structure. For example, as a result of the embedding structure, the substrate material may be unevenly distributed in the container, which may have many undesirable effects such as uneven wash water distribution through the lamination of wipes, Within the wiping material itself, concentration of the washing water occurs in a particular area within the stack. In addition, many embedding structures also form ridges and grooves in the substrate material, both of which tend to reduce the strength and softness of the wiping material in addition to being aesthetically undesirable.

Therefore, it is desirable to provide a wet wipe substrate suitable for many applications, such as a hard, soft and absorbent baby wipe. It is also desirable to provide a laminate structure for the wet wipe material that facilitates and facilitates one wipe material distribution from the wipe material stack.

The present invention addresses these problems by providing a stack of wet wipes with improved folding and embedding structures.

FIELD OF THE INVENTION The present invention relates to laminates of wet wipes provided with improved folding and embedding structures, in particular lamination of wet wipes in which each wipe can be easily separated by the consumer from the wet wipe stack. It's about water.

1 is a perspective view showing a wet wipe material folded in a Z shape.

FIG. 2 is a schematic cross-sectional view showing the stack of wet wipes folded and inserted into a dispensing container. FIG.

3A is a cross-sectional view taken along the line X-X of FIG. 1 showing the wiping material having a front edge panel 9, a center panel 8, and a rear edge panel 10 and folded into a Z-shaped folded structure.

FIG. 3B is a cross sectional view showing the folded wipe material with a lip 36 in the front edge panel. FIG.

4A, 4B, 4C, and 4D are cross-sectional views illustrating four embodiments of a fold and insert structure for a wet wipe in accordance with the present invention.

Therefore, the present invention relates to a wet wipe for wiping a part of a body, such as a baby wipe, and a wet wipe for wiping other surfaces. In particular, the present invention relates in particular to a laminate structure for a wet wipe, which facilitates the dispensing and separating of one wipe from the stack of wet wipes in applications with containers and dispensing holes.

Accordingly, the wet wipe material stack structure includes a first wipe material assembly and a second wipe material assembly, each wipe material comprising a substrate and a liquid mixture. Each of the wiping materials extends longitudinally from the first leading end edge to the second trailing end edge and has two or more folds to provide a front edge panel, a center panel, and a rear edge panel.

According to the invention, the first wipe material assembly is sandwiched between the second wipe material assembly and vice versa, resulting in at least a portion of the front edge panel of each of the second wipe material assemblies and the central panel. At least a portion of the first wiping material assembly is sandwiched between at least a portion of the wiping material and the rear edge panel and at least a portion of the central panel. Similarly, at least a portion of the central panel of each of the first wipe material assemblies and at least a portion of the front edge panel is at least a portion of the wipe panel of the second wipe material assembly and at least a portion of the central panel. It is sandwiched between. In addition, the front edge panel or the rear edge panel of each of the first wipe material assemblies may be up to 50% of the corresponding center panel length, and the front edge panel or the rear edge panel of each of the second wipe material assemblies The wiping material is sandwiched so that the length of is at most 50% of the corresponding center panel length.

According to the invention, the wet wipes comprise a substrate on which the liquid mixture is coated or impregnated. The substrate may be woven or nonwoven, foaming agent, sponge, battings, balls, puffs, or films, most preferably nonwovens, consisting of natural or synthetic fibers or mixtures thereof. Can be. Preferably, the fiber composite is a mixture of hydrophilic fiber materials, such as viscose fibers, cotton yarn fibers, or flax, and hydrophobic fiber materials, such as polyethylene tetraphthalate (PET) or polypropylene (PP). Furnace by weight ratio of 20% -80% hydrophilic material and 80% -20% hydrophobic material. Two particularly preferred composites are 50% viscose / 50% PP, and 50% viscose / 50% PET. The substrate preferably has a basis weight of at least ²⁰ gm ⁻² , preferably 150 gm ⁻² , most preferably the basis weight is ²⁰ gm ⁻² to 70 gm ⁻² , more preferably 50 gm ⁻² to 65 gm ^{− It} is in the range of ² . The substrate can have any caliper. Typically, when the substrate is made by a hydroentangling process, the average caliper of the substrate is less than 0.8 mm. More preferably, the average caliper of the substrate is between 0.1 mm and 0.4 mm. Substrate calipers are measured according to reference method # 30.4-89, of the standard EDANA nonwovens industry methodology. The bulk density of the substrate is about 1.0 g / cm ³ , preferably about 0.9 g / cm ³ , most preferably about 0.7 g / cm ³ .

In addition to the fibers used to make the substrate, the substrate may have other components or materials added as known in the art. Preferred types of additives will depend on the particular end use of the substrate contemplated. For wet wipe materials, such as, for example, wet toilet paper, paper towels, facial tissues, baby wipes, and other similar air containing articles, high wet strength is a desirable attribute. Thus, the addition of chemicals, such as wet strong resins known in the art, is often preferred, especially for cellulose based materials. A general paper on the types of wet strength resins used in paper technology is the wet strength in paper and paperboard of the Pulp and Paper Industry (New York, 1965), Technical Association of the Pulp and The paper industry is published in the periodical No. 29 of the TAPPI major. In addition to the wet strength additives, it may also be desirable to include certain dry strength and lint control additives known in the art, such as starch binders. Moreover, the substrate may also include an agent to improve the optical properties of the substrate material, such as opacifying agents, for example titanium dioxide.

According to the invention, the substrate can be produced by any method known in the art. For example, the nonwoven substrate may be formed by a dry forming technique such as air containing, or by containing moisture such as in a paper making machine. Other nonwoven fabrication techniques may also be used, such as melt blown, spun bonded, needle punched and spun laced methods. The preferred method is hydroentangling.

According to the present invention, there is provided a laminated structure of wet wipes, which results in improved easy dispensing and separation of one wipe from the wet wipe stack, and easy recognition of the front edge position of each subsequent wipe and its easy grip. Let's do it.

The present invention will now be described with reference to the drawings. 1 provides a perspective view of one folded wet wipe material 1. FIG. 2 is a cross-sectional view illustrating the stacking of superposed embedded wipe material 23 according to the present invention contained within a vessel 20. The container 20 includes a barrel portion 21, for example a lid 22 pivotally coupled to the tube portion by a hinge mechanism, and a dispensing hole 24. In an alternative embodiment, the wiping material may also be laminated, thus unit packing in a moisture impermeable package, such as a foil or laminated polymer film package, to provide a fill package for use in filling the container. do.

According to the present invention, the laminated structure includes a first wipe material assembly and a second wipe material assembly which are fitted to each other. 1 to 3, each folded wipe 1 in each assembly extends longitudinally from the first front end edge 2 to the second rear end edge 3. The folded web also has side edges 4, 5 extending longitudinally from the first front end edge 2 to the second rear end edge 3. Each folded wipe 1 has three panels by having two or more folds. As used herein, the panel is the portion of the wipe that extends between the two folds or between the fold and the corner end.

The first panel fold 6 is generally parallel to the front edge 2 and generally perpendicular to the side edges 4, 5. The first panel fold 6 is longitudinally spaced from the front edge 2 in order to provide a front edge panel 9 that extends between the first panel fold 6 and the front edge 2. Is away. The second panel fold 7 is generally parallel to the first panel fold 6 and is spaced apart therefrom in a longitudinal direction, whereby the first panel fold 6 side front edge panel ( A central panel 8 is provided, which is coupled to 9 and extends between the first panel fold 6 and the second panel fold 7. The rear edge panel 10 is coupled to the center panel 8 on the second panel fold 7 side and extends between the second panel fold 7 and the rear edge 3. According to the invention, the wiping material is provided with a first panel fold 6 and a second panel fold 7 to provide the corresponding front edge panel 9, center panel 8, and rear edge panel 10. Fold in) Thus, the wiping material may be folded into a number of structures prior to insertion. This is clearly explained with reference to the corresponding surface of each panel as shown in FIG. 3.

In FIG. 3A, each wiping material is the front edge panel 30 of the first upper surface, the front edge panel 31 of the second lower surface, the rear edge panel 32 of the first upper surface, the rear side of the second lower surface. A corner panel 33, a center panel 34 of the first upper surface, and a center panel 35 of the second lower surface. Thus, the front edge panel and the rear edge panel may be provided by the first panel fold and the second panel fold, respectively, so that the panel rests on the top contact surface of the center panel or the bottom contact surface of the center panel. As illustrated in FIGS. 1 and 3A, the front edge panel 9 is laid over and adjacent to a portion of the upper contact surface of the center panel 8 and the rear edge panel is attached to a portion of the lower contact surface of the center panel 8. By adjoining underneath, a wiping material folded in a so-called inverse Z-shape is provided. Alternatively, the wiping material may be folded to provide a Z-shaped folded structure. In another alternative embodiment, the front edge panel and the rear edge panel of each wiping material may be folded so as to lie over and adjacent to a portion of the top surface of the central panel. Preferably, the wiping material of the first assembly and the second assembly is folded, for example, to provide a mirror image of each other, such that the first wiping material assembly is folded in a Z-shaped fold and the second wiping material assembly is inverted Z-shaped. Fold in form

Moreover, in addition to the front corner panels, in the center panel and the rear corner panels described above, each wiping material may further have additional panels. In particular, the front corner panel and / or rear corner panel may also be provided with additional folds to provide a front corner panel lip 36 or a rear corner panel lip as shown in FIG. 3B. The lip is formed by providing a panel lip fold in the front edge panel or the rear corner panel adjacent to the front or rear edges of the folded substrate and spaced therefrom to provide a lip extending between the panel lip fold and the end edge. do. The panel lip can be folded on the bottom surface of the front edge panel such that the front end edge is below the front edge end panel. Such a structure is particularly beneficial for facilitating cornering. Alternatively, the front edge panel can be folded so that the front end edge rests on the top surface of the front edge panel. The lip can also be located on the top or bottom surface of the rear edge panel. The lip typically extends from the front edge or rear edge of 4 cm to 0.1 cm, preferably 2 cm to 0.25 cm, to the lip fold of the front corner panel or the lip fold of the rear corner panel.

According to the invention, the overall size of the substrate material and its panel depends on the intended application of the wiping material and can be selected accordingly. Preferably, the ratio of the front corner panel to the center panel to the rear corner panel is 1: 2: 1 to 1: 5: 1, most preferably the ratio is 1: 3: 1. More preferably, the length ratio of the wipe panel of the first wipe member assembly to the second wipe member assembly is the same, and most preferably the front edge panel and the rear edge panel are about one quarter of the wipe length. In one illustrative example, where the wipe material can be used as a baby wipe material, each folded wipe material 1 has a length of 10 cm to 30 cm measured longitudinally from the front end edge 2 to the rear end edge 3. It can have an unfolded length of. For each folded wipe 1, the spacing between the first panel fold 6 and the second panel fold 7 may be between 2 cm and 7 cm, while the front edge panel 9 and the rear edge The length of the panel 10 may be between 2 cm and 7 cm. In a preferred embodiment, the spacing between the first panel fold 6 and the front end edge 2 is more preferably between 3 cm and 6 cm, even more preferably between about 3 cm and 5 cm. More preferably, the spacing between the first panel fold 6 and the second panel fold is between 3 cm and 12 cm, even more preferably between about 10 cm and 12 cm. The spacing between the second panel fold 7 and the rear edges is more preferably between 3 cm and 6 cm, even more preferably between about 3 cm and 5 cm.

In accordance with the present invention and with reference to the embodiments shown in FIGS. 4A, 4B, 4C, and 4D, the essential properties of the laminated structure are that each of the first assemblies of the folded wipe material 40 is folded with the wipe material 50. It is fitted with each of the second assembly of).

For example, the wiping material x of the second wiping material assembly is sandwiched between the wiping materials x folded in the Z-shaped folds and folded in the reverse Z-shape of the first wiping material assembly. Similarly, the wiping material y of the first wiping material assembly is sandwiched between the second wiping material assembly wiping material x, and the wiping material y of the first wiping material assembly is the second wiping material assembly or the like. Is inserted into the wiping material (y). In this manner, starting from the second wipe material assembly x, at least a portion of the center panel 52x of each of the second wipe material assemblies 50, and at least a portion of the front edge panel 51x. The first wiping material assembly 40 is sandwiched between the wiping material x of the first wiping material assembly between at least a portion of the front edge panel 43x and at least a portion of the central panel 42x. Similarly, at least a portion of the center panel 42y of each of the first wipe material assemblies 40 and at least a portion of the front edge panel 41y may have the rear edge panel of each of the second wipe material assemblies 50. It is sandwiched between at least a portion of 53x and at least a portion of the center panel 52x.

According to the invention, other essential properties of the laminate structure relate to the relative lengths of the panels of each of the first assembly and the second assembly wipes. Thus, for example, for the wiping material x of the first wiping material assembly, it is known that the length of the front edge panel or the rear edge panel of each wiping material is at most 50% of the corresponding center panel length. Similarly, the length of the front edge panel or the rear edge panel of the wipe material of each of the second wipe material assemblies is at most 50% of the corresponding center panel length. Therefore, the front edge panel and the rear edge panel of each of the first wipe member assembly and the second wipe member assembly provide the sum of the lengths of the front edge panels and the rear edge panels of any wipe material to the length of the corresponding central panel of the wipe material. It may be a predetermined length. Preferably, however, the length of the panels of all wiping materials and more preferably the panels corresponding to the first and second assemblies in each assembly are of substantially the same size.

The laminated wet wipes described herein above produce a better distribution than the wipe wipes laminated according to the prior art. While not wishing to be bound by theory, it is known that improved dispensing relates to the combination of specific overlapping regions of the wiping material panel with the particular interposed folding structure of the first wiping material assembly and the second wiping material assembly.

By using the embedding structure described herein above, removal of the top wiping material, for example, the wiping material (x) of the first assembly from the sandwiched stack, is achieved by the adjacent wiping material (x) front edge panel of the second assembly from the stacking. And will cause agitation of the central panel. In particular, when the front edges of adjacent wipes remain positioned in the center panel during agitation, this facilitates the positioning of the front edges of the wipes adjacent to the consumer, thereby allowing the consumer to grab the thickened portion. to provide. Furthermore, the center or rear edge panel of the front side edge panel of the adjacent wipe material (i.e., the wipe material (x) of the second wipe material assembly) and the top wipe material (ie, the wipe material (x) of the first wipe material assembly). It is known that the overlap region between them ensures that the required amount of substrate material length of the second assembly wipe (x) is protruded and separated from the stack. The overlapping area between the center panel of the adjacent wiping material (x of the second assembly) and the rear edge panel or center panel of the top wiping material (x of the first assembly) is considered less important. Therefore, the positioning of the first panel fold and the second panel fold and the relative lengths of the front and rear corner panels with respect to the center panel are very important. However, the improved distribution provided by the present invention may also relate to other effects and interactions in addition to or instead of a given hypothesis, and will therefore never depend.

In addition to improving dispensing operations, the embedding structure of the embodiment of the invention, in particular shown in FIG. 4A, also ensures that the majority of each wipe substrate material in the stack is positioned in a horizontal plane. This reduces the tendency for lamination to produce protrusions or grooves in the substrate material. In addition, the lamination structure also reduces the tendency for the liquid mixture to be unevenly distributed throughout the lamination.

Further details of the invention will be described in turn with reference to each of the present embodiments FIGS. 4A, 4B, 4C, and 4D.

4A shows the most preferred laminate structure of the present invention. The structure includes a first wipe material assembly 40 that is folded into an inverted Z-shaped structure that fits into a second wipe material assembly that is folded into an inverted Z-shaped folded structure. As such, a portion of the center panel 42x (42y) of the wiping material of each of the first assemblies 40 is in contact with a portion of the front edge panel 51x (51y) of the wiping material of each of the second assemblies 50. The entirety of the surface by the front edge panel {51x (51y)} of the wiping material of each of the second assemblies 50 is substantially all one by one portion of the central panel {42x (42y)} of each of the wiping materials of the first assembly 40. Contact. In this embodiment, the front edge panel 41y and the rear edge panel {43x (43y)} of each of the first wiping material assemblies 40 are at most 50% of the corresponding center panel {42x (42y)} length. The length is substantially the same. Correspondingly, the front edge panel {51x (51y)} and rear edge panel {53x (53y)} of each of the second assemblies 50 of the wiping material are the maximum of the corresponding center panel {52x (52y)} length. 50% and the length is practically the same. Moreover, the front edge panel {41x (41y)}, rear edge panel {43x (43y)}, and center panel {42x (42y)} of each of the wiping materials of the first assembly 40 have a second wipe length. It is substantially the same as the corresponding front edge panel {51x (51y)}, rear corner panel {53x (53y)}, and center panel {52x (52y)} of the reassembly 50. In particular, in the embodiment shown in FIG. 4A, the front edges of each of the first wipe material assembly and each of the second wipe material assemblies are about one quarter of the total length of each of the wipe materials.

The embodiment shown in FIG. 4B is the same as the embodiment of FIG. 4A for each panel length. However, in this embodiment, the wiping material of the first assembly and the second assembly is folded so as to be adjacent to the lower surface of the center panel of the corresponding wiping material prior to the insertion of the front and rear edge panels of the wiping material. Therefore, after the inserting operation according to the present invention, a portion of each wiping center panel 42x (42y) of the first assembly 40 is replaced with each wiping center panel 52x (52y) of the second assembly 50. }, And a portion of the wiping material rear edge panel 53x (53y) of the second assembly is in contact with the wiping material front edge panel 41y of the first assembly 40. Similarly, a portion of each wipe back side edge panel 53x of the second assembly is in contact with a portion of the wipe front side edge panel 41y of each of the first assemblies, and a wipe center panel 52x of each of the second assemblies is provided. A portion of) contacts a portion of the wipe center panel 42y of each of the first wipe assembly.

The embodiment according to FIGS. 4C and 4D shows a laminated structure, in which the wiping material of the first assembly 40 is fitted into a second wiping material assembly 50 that is folded into an inverted Z-shaped structure and folded into a Z-shaped fold. . However, in these embodiments, the lengths of the wiping material front and back corner panels of each assembly are not the same. In the embodiment shown in FIG. 4C, the length of the wiping material front edge panel of the first assembly and the second assembly is at least 50% of the length of the central panel and is substantially the length of the central panel of each of the wiping materials of the first assembly and the second assembly. About 60%. As a result, the length of the rear edge panels of each of the wiping materials of the first assembly and the second assembly is less than 50% and about 30% of the center panel length. In the embodiment shown in FIG. 4D, the length of the rear edge panel of each of the wiping materials of the first assembly and the second assembly is at least 50% of the center panel length of each of the wiping materials of the first assembly and the second assembly, and about 60%. %to be. Correspondingly, the length of each wipe front edge panel is less than 50% of the center panel length and is about 30%.

In a particularly preferred embodiment according to the present invention, for example, as shown in FIG. 4A, the second panel fold 45x of each of the wiping materials of the first assembly is characterized by each of the adjacent wiping materials of the second wiping material assembly. It should not be in direct contact with the first center panel fold 54x. Similarly, the second panel fold 55x of each wiping material of the second assembly should not contact the first panel fold 44y of the adjacent wiping material of the first assembly. Preferably, the distance between the fold lines should be at least 1 mm, preferably between 1 mm and 5 mm, and most preferably between 1 mm and 3 mm. This implies that the contact between two adjacent wipes (x of the second assembly and y of the first assembly) interferes with the ability of the top wipe to separate from the adjacent wipes and causes too much substrate material of the adjacent wipes. This is because it is believed to cause to separate from the stack.

In another preferred embodiment of the present invention, it is also desirable to provide a visible and / or tactile indication in the front edge or panel. The indication also helps the consumer find the front edge itself. The visible indicia may be provided, for example, in the form of thin colored strips or bands printed on the surface of the adjacency front side edge panel of the edge itself.

Particularly preferred means for providing edge markings are by the use of nonlinear edges such as repeating sine waves or repeating zigzag patterns. The non-linear pattern may extend partially along the length of the edge in a continuous or intermittent manner, or more preferably substantially along the entire length of the edge of the wipe. The provision of the corners provides a visible edge position indication and a tactile edge position indication. The mechanism further facilitates the convenience of wiping material distribution.

According to the invention, the substrate material is typically dipped or coated with a liquid mixture. It is an advantage of the present invention that the laminate structure allows various mixtures to be used with the substrate material without significantly affecting the dispensing mechanism. This is not only useful for allowing the properties of the mixture to be changed, but also allows the load of the mixture to be changed through the stack to prevent the mixture from sinking to the bottom of the stack. According to the invention, the liquid mixture of the term refers to any mixture which is in the form of a liquid when the wiping material is in contact with the surface. Typically, the mixture may be an aqueous alcohol based or emulsion, ie water-in-oil or oil-in water or multiple emulsions, preferably the emulsion is oil-in-water. Emulsion. The emulsion may also include a lipid phase, which can be broken by minimal pressure application, for example by wiping the skin. Typically, the mixture will comprise from 2% to 50% and 50% to 98%, preferably deionized or distilled water, by weight of the active mixture. Preferably 2% to 20% of the active ingredient is in the oil phase and the remainder is in the aqueous phase.

According to the invention, the wet wipes are provided with an emulsion mixture containing an oil phase in the range of 1% to 20%, preferably 2% to 10% by weight of the mixture. Advantageously, the oil based phase can be extracted from natural sources, such as in plant or animal oil, or a synthesis or some composite thereof. Suitable plant and animal oils for use herein are waxes, waxes such as lanolin, candelilla, and oils such as glycerin esters and glycerin ethers, caprylic and capric triglycerides. fatty alcohols such as capric triglycerides and octylpalmitate, fatty acid esters, and fatty acid ethers. Suitable mineral oils include petroleum based oils such as paraffin and petroleum jelly. Synthetic oils for use herein include, for example, ethylene polymers of polyethylene wax or silicone based oils. Suitable silicone oils include polydimethylsiloxanes, volatile cyclomethicones, dimethiconols, siloxysilicates, amino- and phenyl derivatives of siloxanes, and mixtures thereof. Examples include dimethicone (Dow Corning 200 Fluids), cyclomethicone and dimethicone (Dow Corning 1401 fluid), cetyl dimethicone (Dow Corning 2502 fluid), dimethicone and trimethylsiloxysilicate (Dow Corning 593 fluid), cyclomethicone (Dow Corning 244, 245, 344 or 345 fluid), phenyl trimethicone (Dow Corning 556 fluid), or combinations thereof.

Oil-in-water emulsions typically require emulsifying agents. It is preferred that the emulsifying agent that can be used in the present invention is capable of major emulsifying oil-in-water emulsions. The emulsifying agent is in the range of 0.02% to 5.0%, preferably 0.02% to 3.0% by weight of the mixture.

In a preferred embodiment, the emulsifying agent is a copolymer of C10-C30 alkyl acrylate, one or more monomers of acyl acid, methylacrylic acid, or aryl ether or sucrose of sucrose. It is a polymer type of emulsifying agent, such as one of their simple esters that crosslinks with the aryl ethers of pentaerythritol. Accordingly, emulsifying agents that may be useful in the present invention are Cetereth-12, Setiereth-20, or Pemulen, available from BF Goodrich Company, USA. ) TR1 and TR2. However, other known emulsifying agents, such as ethoxylated fatty alcohols, glycerin esters of fatty acids, alkali metal salts, sugar inducing agents, may also be suitable for use herein. Other useful emulsion agents include those disclosed in detail in EP-A-328 355.

According to the invention, the mixture may comprise a stabilizing agent or preservative. Stable agents suitable for use herein are phenoxyethanol, benzoate sodium, sorbate potassium, methylparaben, propylparaben, propylparaben, ethyl, preferably in the range of 0.1 to 1.0%. Ethylenediamine tetraacetic acid (hereinafter EDTA) of paraben (ethylparaben), butylparaben, sodium benzoate, potassium sorbate, benzalkonium chloride, and disodium salt Mentioned)} or other EDTA salts (sequestrenes). The sequestering agent is a family of complex agents of ethylenediamine-tetraacetic acid and salts and of general metal complexes. The total amount of stabilizing agent should be in the range of 0.1% to 4.0% by weight of the mixture.

The mixture of the present invention may further comprise 0.02% to 5.0% by weight of the emollient or moisturizer of the mixture. Emollients are preferably water soluble and include polyhydric alcohols such as propylene glycol, glycerin, and also water soluble lanolin derivatives.

Another optional ingredient that may be used in the present invention is an anti fungal agent, an antibacterial agent, a skin protector, a fat soluble washing agent, a water soluble surfactant, or a detergent, preferably deionized or amphoteric, pH Adjusting agents, perfumes, fragrances, and the like.

In order for the emulsion to provide good cleaning performance to the wet wipes, the delivery viscosity should be less than 500 mPas, preferably in the range of at least 100 mPas to 300, and most preferably in the range of 120 to 180 mPas.

In preparing a wet wipe article according to the invention, the mixture is applied to one or more surfaces of the substrate material. The mixture can be applied at any time during the manufacture of the wet wipes. Preferably, the mixture can be applied to the substrate after the substrate is dried. Various application methods can be used to evenly distribute the lubricating material having a dissolved or liquid phase concentration. Suitable methods include spraying, printing (eg, flexographic printing), extrusion coating (eg, gravure coating or flood coating), thereby passing across the tube. The mixture is forced in via a tube in contact with the substrate, or a combination of these application techniques. For example, when spraying the mixture onto a rotating surface, such as a calender roll, the method thus delivers the mixture to the surface of the substrate. The mixture may be applied to one or both surfaces of the substrate, preferably to both surfaces. The preferred method of application is extrusion coating.

The mixture may also be applied heterogeneously to the surface of the substrate. By heterogeneity, it is meant, for example, that the amount and distribution pattern of the mixture can be varied over the surface of the substrate. For example, some surfaces of the substrate may have larger or lesser amounts of the mixture, including portions of the surface where no mixture is added at all. The mixture is typically applied in an amount of about 0.5 g to 10 g per gram of substrate, preferably 1.0 g to 5 g per gram of substrate, most preferably 2 g to 4 g per gram of dry substrate.

Preferably, the mixture can be applied at any point on the substrate after it is dried. For example, the mixture may be applied to the substrate before calendering or after calendering and before being wound onto the parent roll. Typically, the application will be performed on a substrate that is unwound from a roll having the same width as a large number of wipes intended for production. Thus, the substrate to which the mixture is applied is subsequently cut to produce individual wipes.

Claims (13)

A laminate structure for wet wipes, the laminate structure comprising a first wipe material assembly and a second wipe material assembly, Each of the wipes comprises a substrate and a liquid mixture, each of the wipes extending longitudinally from a first leading end edge to a second trailing end edge, each of the wipes being By providing two folds, the front corner panel, the center panel, and the rear corner panel are provided. The first wiping material assembly is fitted into the second wiping material assembly, At least a portion of the front edge panel and at least a portion of the central panel of each of the second wipe material assemblies are sandwiched between at least a portion of the rear edge panel of the wipe material of the first wipe material assembly and at least a portion of the central panel. Put in, At least a portion of the central panel of each of the first wipe material assemblies and at least a portion of the front edge panel are sandwiched between at least a portion of the rear edge panel of the wipe material of the second wipe material assembly and at least a portion of the central panel. Put in, The length of the front edge panel or the rear edge panel of each of the first wiping material assemblies is at most 50% of the corresponding center panel length, A wet wipe comprising a first wipe material assembly and a second wipe material assembly, wherein the length of the front edge panel or the rear edge panel of each of the second wipe material assemblies is at most 50% of the corresponding center panel length. For laminated structure. 2. The front side of each of the first wipe material assemblies of claim 1, wherein the length of the front edge panel and the rear edge panel of each of the first wipe material assemblies is both at most 50% of the corresponding center panel length. Laminated structure for a wet wipe, wherein the length of the edge panel and the rear edge panel are both up to 50% of the corresponding center panel length. 3. The front edge panel and the rear side of claim 1, wherein the length of the front edge panel and the rear edge panel of each of the first wipe material assemblies is substantially the same length. Laminated construction for wet wipes with edge panels of substantially the same length. 4. The laminate structure of claim 3 wherein the front edge panel of each of the first wipe material assemblies is substantially the same length as the front edge panel of each of the second wipe material assemblies. 5. The method of claim 4, wherein the front edge panel length of each of the first wipe material assembly and the second wipe material assembly of the rear edge length of each of the first wipe material assembly and the second wipe material assembly, respectively. The laminate structure for the wet wipes, wherein the ratio is between 1: 2: 1 and 1: 5: 1. The laminate structure of claim 4, wherein the front edge panels of each of the first wipe material assembly and each of the second wipe material assemblies are approximately one quarter of the total length of each of the wipe materials. 7. The laminate of claim 6, wherein each wiping material of the first wiping material assembly is folded into a Z-shaped folded structure, and each wiping material of the second wiping material assembly is folded into a reverse Z-shaped folded structure. rescue. The apparatus of claim 1, wherein each wiping material of the first wiping material assembly and each wiping material of the second wiping material assembly have a first panel fold and a second panel fold. The distance of the wiping material first panel fold of each wiping assembly and the wiping second panel fold of the second wiping material assembly is between 1 mm and 5 mm, And a distance between the second panel fold of the wiping material of each of the first wiping material assemblies and the first panel fold of the wiping material of the second wiping material assembly is between 1 mm and 5 mm. The laminated structure according to any one of the preceding claims, wherein the wiping material is contained in a container, the container having a dispensing orifice. In the wet wipes according to any one of the preceding claims, A wet wipe, wherein said substrate is nonwoven. The wet wipe according to any one of the preceding claims wherein the substrate comprises hydrophobic fibers selected from polyethylene telephthalate, polypropylene, or mixtures thereof. The wet wipe according to any one of the preceding claims wherein the substrate comprises a hydrophilic fiber selected from cotton, viscose, flax, or mixtures thereof. The wet wipe according to any one of the preceding claims wherein the liquid mixture is an oil-in-water emulsion and the wet wipe comprises between 0.5 g and 10 g of the emulsion per gram of the dry weight substrate. .