This invention relates generally to a multiple layer laminate having a visible indicia for use in absorbent articles, such as adult incontinence garments, feminine hygiene pads and the like, such as disposable underwear, adult and youth briefs, and training pants for children. More specifically, this invention relates to a multiple layer laminate having a visible indicia for use in an absorbent article that can be manufactured efficiently and economically, which exhibits good fit and comfort.
Absorbent articles such as disposable diapers, training pants, adult incontinence garments and the like are known, their major function being to absorb and contain body exudates. Such articles are thus intended to prevent the soiling, wetting, or other contamination of clothing or other articles, such as bedding, that come into contact with the wearer. In the case of disposable absorbent articles, a variety of designs and manufacturing techniques have been developed to maximize performance and comfort to the wearer, as well as to obtain an absorbent article having a visible indicia that is aesthetically pleasing to the wearer. However, many of the current designs and manufacturing methods have been unable to achieve an optimum balance between these desirable, yet often diverging goals. While many developments have been made in the art of disposable absorbent undergarments, there remains a need for further improvements in both design and manufacturing.
In one aspect, the invention provides a multiple layer laminate having visible indicia for use in an absorbent article. The multiple layer laminate comprises a first outer layer, a second outer layer and an elastomeric film interposed between the first outer layer and the second outer layer. A non-elastomeric appliqué having the indicia is interposed between the elastomeric film and the first outer layer or between the elastomeric film and the second outer layer. The non-elastomeric appliqué is coupled to the elastomeric film in a stretched condition such that the appliqué limits the retraction of the elastomeric film from the stretched condition in a location where the appliqué is coupled to the elastomeric film, wherein the indicia is positioned to be visible through the first outer layer, the second outer layer or the first and the second outer layers.
In another aspect, the invention provides an absorbent article having visible indicia. The absorbent article comprises a multiple layer chassis, at least a portion of which includes a first outer layer, a second outer layer, an elastomeric film interposed between the first outer layer and the second outer layer and a non-elastomeric appliqué having the indicia. The non-elastomeric appliqué is interposed between the elastomeric film and the first outer layer or between the elastomeric film and the second outer layer. The non-elastomeric appliqué is coupled to the elastomeric film from a stretched condition such that the appliqué limits the retraction of the elastomeric film from the stretched condition in a location where the appliqué is coupled to the elastomeric film, wherein the indicia is positioned to be visible through the first outer layer, the second outer layer or the first and the second outer layers.
In a yet another aspect, the invention provides an absorbent article having visible indicia. The absorbent article comprises a front panel, a rear panel and a crotch panel extending between the front panel and the rear panel. The crotch panel is associated with an absorbent core wherein edges of the front panel are connected to edges of the rear panel to define a waist opening. The front panel or the rear panel comprises a multiple layer having a first outer layer, a second outer layer, an elastomeric film interposed between the first outer layer and the second outer layer and a non-elastomeric appliqué having the indicia. The non-elastomeric appliqué is interposed between the elastomeric film and the first outer layer or between the elastomeric film and the second outer layer. The non-elastomeric film is coupled to the elastomeric film. The indicia is positioned to be visible through the first outer layer or the second outer layer.
In still yet another aspect, the invention provides a method of manufacturing a multiple layer laminate having visible indicia for use in an absorbent article. The method of manufacturing comprises the step of interposing an elastomeric film in a stretched condition between a first outer layer and a second outer layer. A further step of the method includes interposing a non-elastomeric appliqué having the visible indicia between the elastomeric film and the first outer layer or between the elastomeric film and the second outer layer to form the multiple layer laminate such that the indicia is visible through the first outer layer, the second outer layer or the first and the second outer layers. Another step includes coupling together the non-elastomeric appliqué to the elastomeric film thereby limiting the retraction of the elastomeric film from the stretched condition in a location where the non-elastomeric appliqué and the elastomeric film are coupled together.
In a further aspect, the invention provides a method of manufacturing a multiple layer laminate having visible indicia for use in an absorbent article. The method comprises the step of elongating an elastomeric film. The method further includes positioning a non-elastomeric appliqué having the indicia adjacent a first nonwoven web, positioning a first surface of the elastomeric film adjacent the appliqué to sandwich the appliqué between the elastomeric film and the first nonwoven web, and positioning a second nonwoven web adjacent a second surface of the elastomeric film. The method also includes the step of bonding the elastomeric film, the appliqué and the first and second nonwoven webs to one another to form the multiple layer laminate.
The invention is best understood from the following detailed description when read in connection with the accompanying drawing. It is emphasized that, according to common practice, the various features of the drawing are not rendered to scale. On the contrary, the dimensions of the various features are arbitrarily expanded or reduced for clarity. Included in the drawing are the following figures, in which like reference numerals refer to similar features in the respective Figures:
Although the invention is illustrated and described herein with reference to specific embodiments, the invention is not intended to be limited to the details shown. Rather, various modifications may be made in the details within the scope and range of equivalents of the claims and without departing from the invention.
It is desirable in the art of absorbent articles, such as disposable underwear, briefs and training pants, to produce an absorbent article having visible indicia on at least a portion of the absorbent article to make the article more aesthetically pleasing to the wearer, without sacrificing overall performance of the absorbent article. For example, in some conventional absorbent articles, typical outer covers comprise a non-woven material or the like. Generally, such material is less desirable or less suitable than other surfaces, such as a thermoplastic material surfaces, for providing a surface for printing or including indicia thereon, because it is difficult to print on such fibrous surfaces. Likewise, it is possible to provide an indicia-bearing substrate positioned on a portion of the outside of the nonwoven outer cover. However, including such indicia-bearing substrates results in the absorbent article being less comfortable for the wearer. This is because materials most suitable for printing indicia thereon are generally materials that are not as soft as nonwoven material and are more likely to irritate the skin of the wearer.
The present invention provides an improved absorbent article by providing a multiple layer laminate for use in an absorbent article that is aesthetically pleasing, and also one that maximizes performance and comfort to the wearer of the absorbent article. In one aspect, the invention provides a multiple layer laminate having visible indicia for use in an absorbent article. The multiple layer laminate comprises a first outer layer and a second outer layer. Further, the multiple layer laminate provides an elastomeric film that is interposed between the first outer layer and second outer layer. The multiple layer laminate also includes a non-elastomeric appliqué having the indicia, the non-elastomeric appliqué being interposed between the elastomeric film and the first outer layer. Alternatively, the absorbent article provides a non-elastomeric appliqué between the elastomeric film and the second outer layer. The non-elastomeric appliqué is coupled to the elastomeric film in a stretched condition such that the appliqué limits the retraction of the elastomeric film from the stretched condition. Further, the indicia is positioned to be visible through the first outer layer, the second outer layer or the first and the second outer layers.
By coupling the non-elastomeric appliqué in this way, preferably with ultrasonic bonds, to the elongated elastomeric film, the appliqué limits the ability of the elastomeric film to substantially retract to its un-elongated condition. In an exemplary embodiment, the appliqué is of a gauge or thickness, or has a column strength, such that the retractive force of the elastomeric film does not cause “neck-down” of the appliqué. As used herein, the term “neck-down,” refers to the gathering of the material that results in bending, bunching, folding or the like, of the material as a result of the retractive force of the elastomeric film from its stretched condition that is applied to the appliqué.
In another exemplary embodiment, in which the appliqué is of a lesser gauge or thickness, or has a lesser column strength, the retractive force causes a predetermined amount of neck-down of the appliqué. Preferably, the percentage of neck-down of the appliqué is in the range of about 0% to about 40%, when the elastomeric film is retracted from the stretched condition. More preferably, the percentage of neck-down of the appliqué is in the range of about 10% to about 30%. The percentage of neck-down is based on the length of the appliqué when it is laid flat as compared to the length of the appliqué when the retractive force of the elastomeric film acts on the appliqué. In other words, the percentage of neck-down is the reduction in the footprint of the appliqué both before and after the retractive force of the elastomeric film acts on the appliqué.
In embodiments of the invention where neck-down occurs, in order to compensate for the neck-down of the appliqué, the indicia on the appliqué will be printed with some distortion, for example, by being printed in a widened manner. For example, ovals may be printed on the appliqué that will be viewed as circles once the elastomeric film retracts causing the appliqué to neck-down. By printing in a distorted manner, when the retractive force of the elastomeric film causes the appliqué to neck-down, the indicia will also retract and appear without, or with minimal, distortion. The amount of distortion applied to the indicia is determined based on the amount of neck-down of the appliqué. For example, a 10% distortion in the direction of the neck-down would be applied for an appliqué designed to provide a neck-down of 10%. The ratio would be approximately a 1:1 ratio. Accordingly, the amount of distortion applied to the indicia may be about 0% to about 40%; preferably about 10% to about 30%, though other ranges are contemplated as well.
It is recognized that in embodiments in which the appliqué is of a gauge or thickness, or has a column strength such that the appliqué has a neck-down of about 0%, the appliqué may be too stiff to maximize comfort for the wearer. In this instance, however, the embodiment provides the advantage that the indicia on the appliqué does not need to be distorted, as the appliqué will have minimal, if any, neck-down.
Referring generally to the drawing,
With reference to
As shown in
Similar to the front panel 20, the rear panel 30 of the absorbent article 10, according to the exemplary embodiment of
Also illustrated in
Referring to
In the exemplary embodiment shown in
Exemplary material forming the front 20 and rear 30 panels of an absorbent article of an exemplary embodiment of the invention, including the rear panel inner layer 37 and outer layer 38 and front panel inner layer 27 and outer layer 28, as shown in
Interposed between the front and rear panel outer layers 28, 38 and inner layers 27, 37, respectively, the absorbent article 10 includes waist areas 11, 16, belly areas 12, 15, and leg/thigh areas 13, 14. The waist areas 11, 16 include waist elastics 24, 34, such as elastic strands, threads or filaments. The belly areas 12, 15 include belly elastics 25, 35, shown as elastomeric film. Optionally, the belly areas 12, 15 may be uni-directionally stretchable in a direction across a wearer's belly. And the leg/thigh areas 13, 14 include leg/thigh elastics 26, 36, which include elastic strands, threads or filaments. Optionally, the waist elastics 24, 34 and/or the leg/thigh elastics can be elastomeric film in place of the elastic threads or filaments.
Suitable elastomeric films that may be used in the present invention preferably include bidirectional film manufactured by Pliant Corp. Optionally, the elastomeric film has an elongation of about 80% to about 400%. Preferably, the elongation of the elastomeric film is about 300%. Suitable elastic threads or filaments that may be used in the present invention include, for example, the product spandex, sold under the trademarks LYCRA (manufactured by INVISTA) or CREORA (manufactured by Hyosung, Inc.).
As shown in
In an embodiment of the invention such as shown in
The crotch panel 40 an exemplary embodiment of the absorbent article 10 can be configured as shown in
In another embodiment, the ADL may comprise two separate layers including an acquisition layer and a distribution layer. While one exemplary embodiment of a crotch panel is shown for purposes of illustration, a wide variety of portions and composites are optionally used within the scope of this invention. Exemplary absorbent cores may include those for which the details of each of the layers and materials are as described in U.S. patent application Ser. No. 10/617,218, filed on Jul. 10, 2003, Ser. No. 11/236,994 filed on Sep. 28, 2005 and Ser. Nos. 11/904,467, 11/904,468, and 11/904,493, all of which were filed on Sep. 27, 2007, each of which applications are incorporated by reference in their entireties herein.
In another aspect, an exemplary embodiment of the invention provides an absorbent article having visible indicia in which the absorbent article comprises a multiple layer chassis, as least a portion of which includes a first outer layer, a second outer layer, an elastomeric film interposed between the first outer layer and the second outer layer and a non-elastomeric appliqué interposed between the elastomeric film and the first outer layer, or between the elastomeric film and the second outer layer. The portion of the multiple layer chassis shown in
As shown in
The non-elastomeric appliqué 129 is coupled to the elastomeric film 125 or to the first and/or second outer layer 127, 128, in which the elastomeric film 125 is in a stretched condition. The non-elastomeric appliqué 129 and the elastomeric film 125 are also preferably bonded to the first outer layer 128 and the second outer layer 127. When bonded, the elastomeric film 125 is allowed to relax. However, the retraction of the elastomeric film 125 is limited by the bonding of the non-elastomeric appliqué 129 to the elastomeric film 125 in the location where the non-elastomeric appliqué 129 is coupled to the elastomeric film 125. The tension provided by the bonds also causes the non-elastomeric appliqué 129 to neck-down when the retractive forces from the stretched condition of the elastomeric film 125 are strong enough to cause the non-elastomeric 129 appliqué to become bunched. For example, the non-elastomeric appliqué 125 may be designed so as to provide a neck-down of about 0% to about 40%. Neck-down may be decreased based on the thickness of the appliqué or the particular rigidness of the thermoplastic materials from which it is made. The indicia is visible through the first outer layer 128. The indicia may also, optionally, be visible through the elastomeric film 125 and the second outer layer 127. Also, although shown in
In an alternative embodiment, as shown in
Referring to
Referring now to the embodiment shown in
As with the front panel discussed previously, the non-elastomeric appliqué 639 of the rear panel 630 is coupled to the elastomeric film 635. The non-elastomeric appliqué 639 and the elastomeric film 635 are also preferably bonded to the first outer layer 638 and the second outer layer 637. The indicia is visible through the first outer layer 638. By coupling the elastomeric film 635 and the non-elastomeric appliqué 639 together, the ability of the elastomeric film 635 to return to its un-elongated or pre-stretched condition is limited. Further, the retractive force of the elastomeric film 635 that acts on the non-elastomeric appliqué 639 may cause the non-elastomeric appliqué to neck-down. Alternatively, similar to the embodiment shown in
Optionally, in an embodiment (not shown) each of the front and rear panels of the absorbent article may contain a multiple layer subassembly, such that each of the front and rear panels include an appliqué. In such an embodiment, each of the front and rear panels would have an indicia incorporated in the appliqué that would be visible through either the body-side outer layers or the garment-side outer layers, or both.
This is exemplified by the schematic of
It is also contemplated that the invention may also include graphic design or designs incorporated on the front end of the crotch panel, which may be attached to garment-side of the front panel 720, in addition to having an appliqué having indicia visible through the outer and/or inner layers of the front and/or rear panels. For example, the graphic design can include a wide variety of shapes and characters aesthetically pleasing to wearers, such as cartoon characters for children, as described in U.S. patent application Ser. Nos. 11/904,467, 11/904,468 and 11/904,493 all of which were filed on Sep. 27, 2007, and each of which is incorporated herein by reference.
As shown in
In another aspect, the present invention provides a method of manufacturing a multiple layer laminate having visible indicia for use an absorbent article. The method of manufacturing includes the steps of interposing an elastomeric film in a stretched condition between a first outer layer and a second outer layer and interposing a non-elastomeric appliqué having the visible indicia between the elastomeric film and the first outer layer. Alternatively, the method includes interposing a non-elastomeric appliqué in a stretched condition and having the visible indicia between the elastomeric film and the second outer layer. The method thus forms a multiple layer subassembly such that the indicia is visible through the first outer layer, the second outer layer or both of the first and the second outer layers. The method further includes the step of coupling together the non-elastomeric appliqué to the elastomeric film thereby limiting the retraction of the elastomeric film from the stretched condition in a location where the non-elastomeric appliqué and the elastomeric film are coupled together. Optionally, coupling the non-elastomeric appliqué to the elastomeric film may be performed by ultrasonically bonding the elastomeric film, the non-elastomeric appliqué, and the first and second outer layers together to form the multiple layer laminate.
Optionally, the method may further comprise distorting the indicia of the appliqué. As mentioned previously, the distortion may be included in order to compensate for the neck-down of the non-elastomeric appliqué resulting from the retractive forces of the elastomeric film. The method may thus further comprise the steps of relaxing the elastomeric film from the stretched condition. Additionally, the method may include limiting the neck down of the non-elastomeric appliqué to about 0% to about 40%. The method may also include the step of providing indicia on the appliqué in a distortion in a direction of the neck-down.
Optionally, the method of manufacturing may also include the step of associating the multiple layer laminate with an absorbent core. Absorbent cores for use in the present invention may include a number of absorbent cores suitable for use in diapers, training pants, napkins, incontinence pads and the like. The absorbent cores may include superabsorbent polymers and may comprise one or more layers of a number of liquid-absorbing materials of varying absorbent capacities depending on the use of the product.
In yet another aspect, the invention provides a method of manufacturing a multiple layer laminate having visible indicia for use in an absorbent article. The manufacturing method includes elongating an elastomeric film, as well as positioning a non-elastomeric appliqué adjacent a first nonwoven web and positioning a first surface of the elastomeric film adjacent the non-elastomeric appliqué to sandwich the appliqué between the elastomeric film and the first nonwoven web. Further steps include positioning a second nonwoven web adjacent a second surface of the elastomeric film and bonding the elastomeric film, the appliqué and the first and second nonwoven webs together to form the multiple layer laminate.
In an embodiment according to this aspect, the first nonwoven may be the inner nonwoven of the absorbent article, that is, the nonwoven that is positioned to contact the body of the wearer. Alternatively, in another embodiment, the first nonwoven may be the outer nonwoven of the absorbent article, that is, the nonwoven that is positioned on the side of the article opposed to the wearer.
Embodiments of the absorbent article also include those in which the indicia is visible through the first nonwoven web, the second nonwoven web, or both of the first and second nonwoven webs. In other words, regardless of the position of the appliqué, the indicia may designed to be visible on the body-side of the article, on the garment-side of the article, or be designed to optionally be visible through each of the body- and garment-sides of the absorbent article.
Optionally, the method may further comprise the step of step of ultrasonically bonding the elastomeric film, the non-elastomeric appliqué and the first and the second non-woven webs together. Other bonding processes may also be suitable for use in the present invention, such as those previously described herein.
Though the manufacturing steps described and claimed herein are optionally performed in the order described or claimed, they can be performed in any order, depending upon the equipment and processes selected and the preferences of the manufacturer. For example, the order of positioning or coupling layers such as the elastomeric film, one or more outer layers, and non-elastomeric appliqués can be performed in a variety of orders.
While the invention includes the various embodiments described above, other embodiments of the invention may also include features as shown and described in U.S. patent application Ser. No. 10/617,218 to Glaug et al., filed on Jul. 10, 2003, Ser. No. 11/236,994 to Babusik et al., filed on Sep. 28, 2005 and Ser. Nos. 11/904,467, 11/904,468 and 11/904,493, all of which were filed on Sep. 27, 2007, which applications are incorporated herein by reference. Each of the embodiments of the present invention is expected to provide equal or better functional performance and customer acceptance at a lower cost as compared to conventional protective undergarments.
Although the invention is illustrated and described herein with reference to specific embodiments, the invention is not intended to be limited to the details shown. Rather, various modifications may be made in the details within the scope and range of equivalents of the claims and without departing from the invention.
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