MXPA97006378A - Mechanical fastener with two mecanis - Google Patents

Abstract

It provides a fastening system with two primary mechanisms, economical reusable, capable of being used with disposable absorbent products. The fastening system comprises a first fastening portion (12) second fastening portion (14). The first fastening portion (12) comprises a hook fastening material (16) and a first cohesive portion (18). The second holding portion (14) comprises a non-woven fibrous portion engageable with the hook fastening material (16) and a second cohesive portion (26) engageable with the first cohesive portion (18). The hook fastener material (16) has surface areas of base (22) and hook (20) Several modalities of the first fastening portion (12) include the first cohesive portion (18) that is coated over a portion of the material hook fastener For example, the cohesive can be coated on only the surface area of the base, the surface area of the hook only or a part of both portions of surface area of base and hook The amount, type and manner of applying the cohesive, In addition to the type and base weight of the non-woven material, it can be varied to obtain the shear strength and resistance to the desired release force for the fastener couple

Description

MECHANICAL BRAKE WITH TWO MECHANISMS FIELD OF THE INVENTION The present invention relates to mechanical fasteners of double mechanism that can be fastened and detached repeatedly. The invention also relates to articles, especially disposable absorbent articles, for which fasteners are particularly useful.

BACKGROUND OF THE INVENTION Disposable absorbent articles such as disposable diapers are well-known articles of manufacture, which are used by infants and incontinent persons. Disposable diapers are worn around the user's lower torso and are intended to absorb and contain urine and other body exudates, thereby preventing these exudates from staining, moistening or otherwise contaminating the items (eg, bedding, costume, etc.), who can get in touch with the diaper user. When a disposable diaper is used, the user of the diaper adjusts the diaper on the wearer and fastens it around the wearer's waist by a primary fastening system to effect thereby a lateral closure. Adjusting the diaper around the wearer usually requires that the front and back waist portions of the diaper overlap each other. Since proper and sustained adjustment around the user's waist and legs is vital, for optimal performance in terms of minimizing leakage of body exudates out of the diaper, a diaper fastener system must be able to provide effective lateral closure. (or primary), in which the front and back waist portions are maintained in an overlap configuration. As the diaper is worn, the forces tend to cause the overlapping portions to disengage from the position in relation to each other. In other words, the overlapping portions are subjected to forces that tend to cause the portions to assume a relative position to each other, which is different from the position they assume when the diaper is initially adjusted to the wearer. Unless said deviation is limited, the diaper fit and containment characteristics degrade as the diaper is worn. In this way, the fastening system must be designed to fit securely in such a way that it does not separate due to the shearing forces and shear stress encountered by the fastening system during use. As used herein, "primary fastener system" refers to a system that provides the primary means for coupling and disassociating an article to be used around the user. In the case of an absorbent article, such as a diaper, the primary fastening system operates as the lateral closure means that secures the absorbent article around the wearer and provides a variable side closure to maintain the diaper on the wearer. This is distinguished from the waist closure fastening system described in United States Patent 5,196,000, which was used in addition to a primary fastening system to provide lateral tension for the purpose of preventing cupping, bulging, and winding of the belt. Waist or elasticated waistband. The primary fastening system finds different amounts of shear and shear forces that said belt closure system finds and therefore must be designed differently to adequately resist those forces. As used herein, the term "shear stress" refers to the distributed forces acting tangentially to the contact surface of the members of the fastener system (or along the x / y plane). During the use of a diaper, the shear stress tends to cause the members of the fastener system to move relative to each other; the shear stress will be distinguished from the "detachment forces" which act on the members of the system. bra to separate and detach one from another (in the z direction). A disposable diaper typically subjected to detachment forces in at least 3 ways. Detachment forces are generated by the movements of the user during use as they tend to cause the first and second fastener members to be separated from each other by the user when trying to detach the fastener system during use (this being a special problem for disposable diapers used by babies because babies are not able to detach and remove the diaper by themselves), and by the user to check the diaper for dirt or to remove the user's diaper. Because the fastener system must be capable of being checked and removed by the user, and because the user generates detachment forces that are much greater than the detachment forces generated by the first two methods, the fastener system is preferably designed to have a resistance to the detachment forces (resistance to detachment forces) with respect to only the movement and methods generated by the user. Therefore, the detachment resistance should be only sufficiently large to avoid failure of the fastened system during the first two methods, but low enough to allow the user to check if the diaper is dirty or to remove the diaper of the user without undue difficulty or torn from other diaper members. Therefore, it is desirable to design a primary fastener system capable of resisting shear and shear forces generated by the user, but having a low enough strength to release force to allow the user to easily remove the diaper or to check if the diaper is dirty. Typically, fastener systems having adequate shear strength have been provided to prevent the panels from moving relative to each other. For example, however, due to the shearing forces that are too high, the resistance to detachment of the fastening system is also very high. This is generally the situation because the coating weight of the adhesive on the smooth surface of the backing frame of the fastener is increased to improve the strength of the fastener to the shear forces, the resistance to the release forces also increases quickly. The result is that typical fastener systems can tear the back sheet of the diaper during the detachment process to check if the diaper has been soiled or to adjust it, which is left with a hole in the back sheet of the diaper and makes the fastener unsubstantiated and to the unusable diaper, due to the high resistance of detachment of the fastener. Other primary fastening systems have been provided but suffer from one or more problems. For example, hook and loop fastener systems such as those available as Velero® have been employed but are very expensive and require specific male and female coupling portions. The combination of primary mechanical / adhesive fastening systems as shown in U.S. Patents 4,946,527 and 5,196,000 have also been employed. These systems suffer from being expensive to require specific male and female coupling portions that are matched, and the possibility that the adhesives become unusable by contamination of oils, ointments and powders used during the diaper placement procedure. In this way, it would be advantageous to provide a cheap primary fastener system capable of using a wide variety of male and female coupling portions, resistant to contamination, having a sufficiently high shear strength to prevent the panels from moving one with respect to the other. on the other, they have sufficient resistance to detachment to avoid the failure of the fastening system by the movements of the user, but a resistance to detachment sufficiently low to allow the user to easily remove the diaper and check for dirt or adjustments without making the fastener system incapable of Resuscitate or the unusable diaper.

BRIEF DESCRIPTION OF THE INVENTION According to the present invention, a reusable, economical two-mechanism primary fastening system is provided. The fastening system comprises first and second fastening portions. The first portion of the fastener comprises a fastener material of the hook and a first cohesive portion. The second fastening portion comprises a portion of receiving material such as a non-woven fiber, or other material engageable with the hook fastening material and a second cohesive portion engageable with the first cohesive portion. The hook fastening material has hook and base surface areas. Various embodiments of the first fastening portion include the first cohesive portion that is coated on a portion of the hook fastening material. For example, the cohesive portion may be coated on only the base surface area, on only the hook surface area or on a portion of both the hook and base surface area portions. The amount, type and manner of application of the cohesive material in addition to the type and basis weight of the receiving material can be varied to obtain the shear strength, and resistance to the peel strength desired for the attached fastener. Furthermore, the present invention relates to disposable absorbent articles, such as diapers, having a fastening system according to the present invention. The diaper fastener system fixes the diaper overlap portions to one another and keeps them in contact with each other during use. The fastener system prevents the separation of the lap waist portions because the fastening system is able to withstand the shearing forces generated by the user encountered during use and the shear encountered when using the diaper. In addition, the fastener system allows the user to easily resuscitate and check the diaper for dirt, and to remove the diaper without making the fastener system unable to resuscitate or to the diaper capable of not being worn. Furthermore, the present invention relates to the method of holding two objects together using the fastening system with two mechanisms.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the invention will become more apparent from the following detailed description of the invention, as illustrated in the accompanying drawings, in which parts of similar references refer to the same parts throughout the various figures wherein: Figure 1 is a schematic view of a primary mechanism of two mechanisms fastener of the present invention; Figure 2 is a schematic view of a first embodiment of a first portion of the fastener of the present invention; Figure 3 is a schematic view of a second embodiment of a first portion of the fastener of the present invention; Figure 4 is a schematic view of a third embodiment of a first portion of the fastener of the present invention; Figure 5 is a schematic view of a fourth embodiment of a first portion of the fastener of the present invention; Figure 6 is a perspective view partly cut away of a diaper modalizing the fastener device of two mechanisms of the present invention; and Figure 7 is an enlarged fragmentary sectional view taken along line 7-7 of Figure 6. The coupling elements 20 also have a portion 24A of the rod 23B and a coupling portion 23C, which are oriented towards or towards the back 22 of a portion 24D that is oriented or away from the backrest 22.

DETAILED DESCRIPTION OF THE INVENTION As seen from Figure 1, a primary two-mechanism mechanical fastening system 10 is provided. The fastener comprises a first portion of the fastener 12 and a second portion of the fastener 14. The first portion of the fastener 12 comprises the fastening material of the fastener 12. hook 16 (a first portion of the mechanical fastener) and a first cohesive portion 18. As used herein, the term "hook fastening material" is used to designate a material having coupling elements, so the hook fastening material can also be referred to as a male fastener.It is also to be understood that the use of the term "hook "should not be limited in the sense that the coupling elements may comprise any of the forms as are known in the art as long as they are adapted to couple a complementary mechanical closure element such as a curl fastening material or other material of hook fastening The hook fastening material 16 is preferably intended to mechanically couple a fibrous nonwoven web or any other suitable material, thus, a hook fastening material according to the present invention can be manufactured from from a wide range of materials, suitable materials include nylon, polyester polypropylene, or any other ombination of these materials or other materials as are known in the art. As seen from Figure 1, a suitable hook fastening material comprises a number of formed coupling elements 20 projecting from a back 22 such as the commercially available material designated trademark "Scotchmate" No. FJ3402 available from Minnesota Mining and Manufacturing Company, St. Paul, Minn. As seen in Figure 1, each coupling element has a base 23A, connected to the backrest 22, a rod 23B connected to the base 23A and a coupling portion 23C connected to the rod 23B and separated from the base 23A. Alternatively, the coupling elements may have any shape such as hooks, T-shaped, mushroom-shaped or any other form that is well known in the art. Especially preferred are the hooks or tips shown in U.S. Patent No. 5,116,563 to Thomas et al., And U.S. Patent No. 5,058,247 to Thomas et al., Both of which incorporate the present wing by reference. The first cohesive portion 18 comprises a cohesive material. The term "cohesive material" refers to materials that only do not bond with other cohesives and will generally adhere only strongly to a similar material. The cohesive materials comprise water-based cohesives, thermal fusion cohesives, cross-linked cohesives and non-tacky cohesives or mixtures thereof. Preferably, it is used in a non-tacky cohesive. As discussed in more detail below, the first cohesive portion may be coated on a portion of the surface area of the hook fastening material or a segregated area of the first portion of the fastener 12. The second portion of the fastener 14 is complementary to the first. portion of the fastener 12 and is comprised of a portion of the receiving material 24 (a second portion of the mechanical fastener), and a second cohesive portion 26. The portion of the receiving material 24 provides a plurality of fibers or other elements that engage the fastener elements. coupling 20 of the hook fastening material 16. The receiving portion 24 is preferably a non-woven material, such as a carded web or a non-woven web spin-linked. The receiving portion 24 may also be a fibrous web that includes substrates insufflated in the molten or felted state. In addition, the portion of receiving material 24 can be alternately comprised of woven materials, cross-linked foams, or perforated films capable of coupling the hook fastening material 16. The second cohesive portion 26 is comprised of a cohesive material which is compatible and will form a joint or engage with the first cohesive portion 18. As seen in Figure 1, the second cohesive portion 26 is coated on at least a portion of the nonwoven material 24. The second cohesive portion 26 is preferably comprised of the same material cohesive as the first cohesive portion 18. As seen in Figures 2 to 5, various embodiments of the first fastener portion 212, 312, 412, 512 are shown. The hook fastening material 216, 316, 416, 516 and the cohesive 218, 318, 418, 518, are combined in various ways. As seen in Figure 2, a first portion of the fastener is provided where the cohesive portion 218 is not covered in the hook fastening material 216, but is segregated in a different patch away from the hook fastening material 216. The portion Segregated cohesive 218 and segregated hook fastening material 216 may be applied in a pattern as shown in Figure 2, or alternate segregated patterns such as strips, ladies' pads or other patterns. As seen in Figures 3 to 5, the cohesive portion 318, 418, 518 of the first fastener portion 312, 412, 512 may also be coated on a portion of the hook fastening material 316, 416, 51 6. As seen in Figures 3 to 5, the hook fastening material 316, 416, 516 has a hook surface area 328, 428, 528 and a base surface area 330, 430, 530. The surface area of the hook 328, 428, 528 is the surface of the coupling elements 320, 420, 520, of the hook fastening material 316, 416, 516. The hook surface area 328, 428, 528 has a portion 328A, 428A, 528A facing toward or facing toward the resilient 322, 422, 522 and a portion 328B, 438B, 528B, which is oriented away from or away from the backrest 322, 422, 522. The base surface area 330, 430, 530 is the backing surface 322, 422,522 from which the linking elements 320, 420, 520 are projected. As seen in Figure 3, an embodiment of the first portion of the fastener 312 is provided wherein a portion of the hook fastening material 316 is coated with cohesive. In this embodiment, only a portion of the base surface area 330 of the hook fastening material 316 is coated with cohesive 318. Although only a portion of the base surface area 330 is coated with cohesive 318 in Figure 3, the entire area surface of base 330 may be coated. As seen in Figure 4, another embodiment of coated hook fastening material of the first fastener portion 412 is provided. This embodiment includes a portion of the hook surface area 428 of the fastener elements 420A-420D of the fastening material. of hook 416 is coated with the first cohesive portion 418. As seen in Figure 5, a third embodiment of the coated hook fastening material of the first portion of the fastener 512 is provided. This embodiment includes at least a portion of both the hook surface area 528 of the coupling elements 520A-D, as a portion of the base surface area 530 whereby the coupling elements 520D-520E of the projecting hook fastener material 516 are coated with cohesive 518. As seen in Figures 4 and 5, those coupling elements 420, 520 which are respectively coated with the first cohesive portion 418, 518 are coated only in the portions 428B, 528B of the hook surface area 428,528 which are oriented away from the backing 422, 522, or the base surface area 530. 530. Additionally or alternatively and depending on the composition of the receiving material, the total surface area 428, 528 of the coupling elements 420, 520 may be coated or only the surface area 428A, 528A of the coupling elements 420, 520 which are oriented towards or towards the back 522, 522 or towards the surface area 430, 530 may be coated with the first cohesive portion 418, 518. For coupling to the primary fastener system 10, the first portion of the fastener 12 comes into contact with the second portion of the fastener 14 where pressure is exerted by the user activating the cohesive fastening mechanism comprised of the first and second cohesive portions 18 and 20 and a mechanical fastening mechanism comprised of the hook fastening material 16 and the receiving material 24. The pressure exerted by the user engages the cohesive mechanism by attaching or coupling the first cohesive portion 18 to the second cohesive portion 26, and activates the mechanical fastening mechanism coupling the hook fastening material 16 to the receiving material 24. Rather than requiring each of two clamping mechanisms to independently provide the necessary shear strength or shear strength, the present invention utilizes and requires both of these two clamping mechanisms in place. combination to provide a fastener coupled with the resistance to the desired shear force and detachment force. As used herein, "shear force strength" is defined as the maximum force in the x / y plane defined by the plane of the clamping mechanism, which the engaged clamping mechanism can resist without decoupling. As used herein, "resistance to detachment force" is the maximum detachment force in the Z direction, the direction normal to the plane of the fastener mechanism, which the fastener attached can resist without uncoupling. As discussed above, the mechanical fastening mechanism includes the hook fastening material 16 and the nonwoven material 24. When there is sufficient tension between the hook fastening material 16 and the nonwoven web in the x / y plane, the mechanical fastening mechanism provides excellent strength to shear forces. Since the present invention allows the use of non-curl-type receiving material 24, common the mechanical fastening mechanism only does not always provide adequate resistance to the detachment force when there is little or no tension in the mechanical fastening mechanism in the plane x / y In many examples, the mechanical fastening mechanism would only uncouple if there were no tension in the appropriate x / y plane, because the receiving material does not provide the proper anchorage to which the hook fastening material can attach in the Z direction. cohesive fastening, however, provides the fastening system 10 with the required shear force resistance that the mechanical fastening mechanism may not always provide and maintain fastener attachment or binding during times when there is a lack of tension in the x / plane Y. The cohesive holding mechanism also provides some resistance to shear force. However, since the mechanical clamping mechanism provides resistance to the shear force, the cohesive clamping mechanism is not required to provide as much resistance to the shear force as if it were the only clamping mechanism. This allows the use of weaker cohesives and smaller amounts of cohesive, thereby avoiding the destruction of the fastening mechanism or the materials to which the mechanism joins when the fastener system is uncoupled 10. Having two mechanisms whose attributes can be To alter, the strength resistances to detachment and shear strength of the attached fastener can be achieved in a variety of ways. For example, the amount, type and manner of applying the cohesive can be varied. Using cohesive with stronger bond strengths will increase the shear strength and shear force. Also increasing the weight of the coating, i.e., the amount of the coated cohesive on the hook fastening material 16 and the receiving material 24, will increase the shear and shear forces. Typical cohesive coating weights are 0.30 mg / inch2 to 1.0 g / inch. Finally, the longest of the surface area covered by the first and second cohesive portions 18 and 26, the greater number of bonding points or points of contact that will exist between the two cohesive portions and will be the greater resistance to shear and strength of detachment Also if the receiving material is a material its base weight can be varied. A lower base weight nonwoven material will allow the coupling members 20 of the hook fastening material 16 to penetrate deeper into the nonwoven receiving material 24. This will provide a strong shear strength as the linking or coupling elements 20 have more fibrous contact that prevents movement in the x / y plane. However, a lower basis weight will provide a mechanical fastening mechanism with less resistance to the detachment force because there is more space between the fibers and therefore fewer fibers for the coupling elements 20 of the hook fastening material 16 to engage in Z direction. As discussed above, to said low base weight woven material, the cohesive mechanism would be used to provide the strength of the necessary additional release force.

The present invention can provide a primary, resilient, coupled two-mechanism fastener system having shear strength values greater than about 2,000 g / in2, preferably greater than 5,000 g / pug 2, and resistance values to the peel strength of between about 300 gr / in2 for approximately 2,000 gr / inch, preferably 300 to 500 gr / in2, for always less than 5,000 gr / in2. The shear strength is measured by cutting a first sample representative of the first portion of the fastener and a second sample representative of the second portion of the fastener, and following the method described in U.S. Patent No. 4,699,622 to Toussant et al. which is incorporated herein by reference. Resistance to the peel force is measured by cutting first and second representative samples, from the first and second portions of the fastener, respectively, and following the method described in U.S. Patent 4,846,815 to Scripps, which is incorporated in FIG. the present by reference. The fastener systems of the present invention have been found to be particularly useful and beneficial when disposable absorbent articles are used. As used herein the term "disposable absorbent article" refers to articles that absorb and contain body exudate and, more specifically, refer to articles that are placed against or close to the wearer's body to absorb and contain the various exudates of the body. body, and which are intended to be discarded after a single use (ie, these are not intended to be washed or otherwise restored or reused). Examples of suitable disposable absorbent articles include diapers, trusses and incontinence undergarments, sanitary napkins, bibs, bands and the like. A preferred embodiment of a disposable absorbent article that modalizes the present invention is shown in Figure 6 as a diaper 50. As used herein the term "diaper" refers to a garment generally worn by infants and incontinent persons which is placed between the legs and fastens around the user's waist. Examples of diaper types to which the present invention is very readily adapted are shown in U.S. Patent No. 26,151, entitled "Disposable Diaper," which was reexpiled to Robert C. Duncan and Norma L. Baker on January 31. of 1967; in U.S. Patent 3,860,003 entitled "Shrinkable side portions for disposable diaper", which was issued to Kenneth B. Buell on January 14, 1975; and in U.S. Patent 4,834,735 entitled "High Density Absorbing Members Having Acquisition Zones of Low Density and Lower Weight", which was issued to Miguel Alemany and Charles J. Berg on May 30, 1989, disclosures of which are incorporated herein by reference. It will be apparent from the following description that the fastener system illustrated and described herein can be applied to the body portion of said diapers. On the other hand, it will be understood that the invention is not limited to any specific diaper structure or configuration. Figure 6 is a partially cut away perspective view of a diaper 50 which modalizes the present invention before being placed on the wearer by the wearer of the diaper. As can be seen from Figure 6, a preferred diaper 50 comprises a body portion 52 and a fastening system 54. The preferred body portion 52 comprises an upper sheet 56 permeable to liquid, or an absorbent core 58, a back sheet 60. liquid impermeable and elastically contractible leg cuffs 62, each leg fold preferably comprising a side flap 64 and one or more elastic members 66. Although the top sheet 56, the absorbent core 58, the backsheet 60, the side flaps 64 and the elastic members 66, can be assembled in a variety of well-known configurations, a disposable diaper configuration is shown and is generally described in the aforementioned patent of the United States No. 3,860,003 which was issued to Kenneth B. Buell on January 14, 1975, and whose patent is incorporated herein by reference. In this preferred diaper configuration, the backsheet 60 is attached to the top sheet 56; the absorbent core 58 is positioned between the upper sheet 56 and the back sheet 60; the side flap 66 extends outwardly from and along each lateral edge of the absorbent core 58; and the elastic member 66 is operatively associated with each side flap 64. Figure 6 shows the body portion 523 in which the topsheet 56 and the backsheet 60 are coextensive and have length and width dimensions generally greater than those of the absorbent core58. The topsheet 56 is superimposed on the backsheet 60, whereby the periphery 68 of the body portion 52 is formed, in other words, the outer boundary of the body portion 52. The periphery 68 comprises longitudinal edges 70 and edges. ends 72. The body portion 52 has an inner surface 74 and an outer surface 76. In general, the outer surface 76 of the diaper 50 extends from one end edge 72 toward the other end edge 72 of the diaper 50, and from a longitudinal edge. 7 0 towards the other longitudinal edge 70 of the diaper 50, and is the farthest surface of the wearer during the use of the diaper. When a backsheet 60 is used, it typically forms the outer surface 76 of the body portion 72. The inner surface 74 is that surface of the diaper 50 opposite the outer surface 76, and in the embodiment shown is typically formed by the sheet upper 56. In general, the inner surface 74 of the diaper 50 is that surface coextensive with the outer surface 76, in which it is for the most part in contact with the wearer when the diaper 50 is used. The diaper 50 has a first region extreme 78 and a second extreme region 80 extending from the extreme edges 72 of the periphery 68 of the diaper to the lateral center line of the diaper 50. Both the first end region 78 and the second end region 80 extend a distance of about half the length of the diaper. 50, such that the end regions comprise each half of the diaper 50. Both the first end region 7 8 and the second end region 80 have panels 82. The panels 82 are those portions of the first end region 78 and the second end region 80. which overlap when the diaper 50 is fastened around the wearer's waist. The limit at which the end regions overlap, and thus the limit to which the panels 82 are formed, will depend on the overall dimensions and shape of the diaper 50 and the size of the wearer. The diaper 50 is provided with a fastening system 54 to form a side closure. In this way the diaper 50 is adjusted to the user and the panels 82 of the first end region 78 and the second end region 80 are maintained in an overlapping configuration when the diaper 50 is used. In a preferred embodiment of the present invention as shown in FIG. shown in Figure 6, the fastening system 54 comprises a closure member 84 disposed adjacent each longitudinal edge 70 of the body portion 52 in the first end region 78, and a landing member 44 disposed on the external surface 76 of the body portion 52 in the second end region 80. As shown in Figure 6, the closure member 84 preferably comprises a tape tab 86 and a first fastener portion 612 of the present invention (a first fastener 88), comprising a hook fastening material 616 and a first cohesive portion 618. As described above, the hook fastening material 616 has a hook surface area 628 and a base surface area 630. As shown in Figures 6 and 7, a portions of both the hook and base surface area 628 and 630 are coated with cohesives 618. Furthermore, as described above, the first cohesive portion 618 may also be segregated or detached from the hook fastening material or may be coated on a portion of the hook fastening material 616 as shown in FIGS.

Figures 2 to 5. The landing member 44 which is engageable with the first fastening element 88 is comprised of the second fastener portion 14 of the present invention as seen in Figure 1, a non-woven fibrous material 24 coated with a material cohesive 26. Each closure member 84 is intended to provide a fastener means for coupling the landing member 44 to provide a secure lateral closure for the diaper 50. In this manner, the closure member 84 comprises at least the first fastener element. 88. Each closure member 84 also preferably comprises a means for positioning the first fastener element 88 adjacent the landing member 44, to achieve a lateral closure. In this manner, the closure member 84 can comprise any of the well-known configurations and securing means for achieving a lateral closure on a diaper 50, such as an internal fastening member secured to the inner surface 74 and / or to the outer surface 76 of the body portion 52, tape tabs, or belts. An exemplary embodiment of an internal fastener member is described in U.S. Patent 4,699,622 entitled "Disposable diaper having an improved side closure", issued to John W. Toussant and Margaret H. Hasse on October 13, 1987, whose patent it is incorporated herein by reference. One embodiment of an incontinence underwear that utilizes a belt suspension system is described in U.S. Patent No. 4,315,508, entitled "Self-Centering, Multi-Use Garment Suspension System", issued to Bolick on February 16, 1982, incorporated here by reference. As shown in Figure 6, each closure member 84 most preferably comprises a tape tab 86. Any of the well-known configurations and constructions of a tape tab 86 may be used. A preferred tape tab is a Y-shaped tape tab as described in detail in U.S. Patent 3,848,594, entitled "Disposable diaper tape fastener system" which was issued to Kenneth B. Buell on November 19 of 1974, and whose patent is incorporated herein by reference. As shown in Figure 6, a tape tab 86 is provided on both longitudinal edges 70 of the body portion 52, most preferably in the first end region 78. A particularly preferred tape tab 86 is illustrated in Figure 7, and has a tongue fastening surface 90 and a tongue backing surface 92. The tongue fastening surface 90 is that surface of the tape tab 86 designed to engage the landing member 44 of the present invention. In this manner, the tongue fastening surface 90 of the tape tab 86 will generally correspond to the intera surface 74 of the body portion 52. The tongue backing surface 92 is that opposite surface of the tongue fastening surface 90. , and generally corresponds to the outer surface 76 of the body portion 52. The tongue backing surface 92 is thus generally exposed during the use of the diaper 50. The preferred tape tab 86 illustrated in Figure 7 is one that it is anchored to both of the inner surfaces 74 and the outer surface 76 of the body portion 52, so as to create a fixed end 94 (i.e., that attachment of the tape tab 86 of the diaper 50 made during the manufacture of the diaper 50) . The tape tab 86 has another element that forms the tongue end 96 (i.e., that union made by the person securing the diaper 50 to the wearer) which is secured to the fixed end 94 and extends beyond the longitudinal edge 70 of the body portion 52, to be secured to landing member 44. In this manner, the preferred tape tab 86 of the present invention has at least 3 elements, a first fixed portion 98, a second fixed portion 100 and a connecting portion. 102. The first fixed portion 98 is that portion of the tape tab 86 that is attached to the inner surface 74 of the body portion 52. The second fixed portion 100 is that portion of the tape tab 86 that is fixed to the web. outer surface 76 of body portion 52. The first fixed portion 98 and the second fixed portion 100 thus form the fixed end 94 of the tape tab 86. The connector portion 102 is that portion of the tongue. ribbon tape 86 which is attached to another portion of diaper 50, generally to landing member 44, by the user when securing diaper 50 to the wearer. The connector portion 102 thus forms the tongue end 96. Additionally, the outer surface 104 of the second fixed portion 100 and the outer surface 106 of the connector portion 102 form the tongue back surface 92 of the tape tab 86. , while the internal surface 108 of the first fixed portion 98 and the internal surface 110 of the portion 102 form the tongue fastening surface 90 of the tape tab 86. The preferred Y-shaped tape tab 86 of the present invention can be constructed in various ways. The first fixed portion 98, the second fixed portion 100, and the connector portion 102 may each be separate tapes that meet and join adjacent the longitudinal edge of the body portion 52 in a joint area. A more practical structure for the tape tab 86 is one in which the connector portion 102 and any of the first fixed portion 98 of the second fixed portion 100, are a strip of unitary tape material. If the connector portion 112 is unitary with the second fixed portion 100 as shown in Figure 7, then the first fixed portion 98 is a separate element that is joined to the combined connector portion and to the second fixed portion adjacent the longitudinal edge 70 of the body portion 52. Preferred materials for the tape tabs comprise a tape material such as tape no. Code XPF14.43.0, Y-9376 or Y-9030 available from The Minnesota Mining and Manufacturing Company of St. Paul, Minn. The tape material in the embodiments is preferably a polyethylene film having a hand-held tongue fastening means for attaching the polyethylene placed in the tape material. The tongue fastening means may comprise any of these adhesives that provide a suitable bond with other portions of the diaper 50, and is preferably any of the pressure sensitive adhesives well known to those of ordinary skill in the art. The preferred tongue fastening means is a pressure sensitive adhesive such as code number XPF1.42.34 available from The Minnesota Mining and Manufacturing Company of St. Paul, Minn. The first fastener element 88 of the closure member 84 forms the closure between the closure member 84 and the landing member 44. In this way the first fastener element 88 provides elements which engage the non-woven fibrous material 24 which is coated with cohesive material. of the landing member 44, to maintain the first end region 78 and the second end region 80 in an overlapping configuration to provide a secure lateral closure. The first fastener element 88 comprises the first fastener portion 612 of the present invention having a hook fastener material 616 that is coated with cohesive 618. The first fastener element 88 may be a separate member attached to and associated with the fastener number 84. or a unitary member with the closure member 84. The first fastening element 88 is preferably attached to either the body portion 52 or the tape tab 86. As used herein the term "attached" encompasses configurations with which the first fastener element 88 is removably secured to the diaper 50 in such a way that the first fastener element 88 can be removed from the diaper 50 or its location during use, and configurations with which the first fastener element 88 is fixed to the diaper 50 such that the first fastener element 88 is securely fastened to the diaper 50. It is also used joining to denote that the first fastener element The fastener 88 can be attached to the diaper 50 or it can be attached to the diaper 50 such as by securing or removably securing the first fastener element 88 to an intermediate member which in turn is secured or releasably secured to the diaper 50. Preferably, as shown in Figure 6, the first fastener element 88 it is fixed directly to the connector portion of the tape tab 86 by a second tongue fastening means 112. Furthermore, the first fastener element 88 can be placed on either side on the diaper 50. When the closure member 84 comprises a member internal fastener, the first fastener element 88 is preferably placed in the panels 82 of the first end region 78, adjacent the longitudinal edges 70. When the closure member 84 comprises a tape tab 86, the first fastener element 88 is preferably placed on either all or at least a portion of the fastening surface 90, or preferably especially of or at least a portion of the portion of the connector portion 102. Most preferably, the first fastener element 88 is disposed on the connector portion 102 on the fastening surface 90 of the tape tab 86. The landing member 44 of the fastening system 54 provides a means for securing itself and the closure member 84 together to provide a secure lateral closure, and maintain the first end region 78 and the second end region 80 in an overlapping configuration. The landing member 44 may be disposed on either side of the diaper 50 as it engages the closure member 84 to provide the side closure. For example, the landing member 44 may be disposed on the outer surface 76 in the second end region 80 on the inner surface 74 in the first end region 78, or on any other portion of the diaper 50 that is arranged to engage the landing member. closure 84. In addition, the landing member 44 can be any of a separate discrete element attached to a diaper member 50 (such as the topsheet 56 or the backsheet 60) or a piece of unitary material that is not divided nor is it discontinuous with the diaper member 50 such as the topsheet 56 or the backsheet 60. While the landing member 44 may assume various shapes and sizes, it preferably comprises one or more (at least one) separate patches of material that are greater in area than the first fastener element 88, and which are secured to the body portion 52 to allow a maximum fit at the wearer's waist. The preferred embodiment of the diaper 50 illustrated in Figure 6 has a rectangular shaped landing member 44 secured to the outer surface 76 of the body portion 52 in the panels 82 of the second end region 80 adjacent to each of the edges. longitudinal 70. In use, the diaper 50 is applied to the wearer by placing the first region 78 under the user's back and directing the remainder of the diaper 50 between the user's legs, such that the second end region 80 is placed across the front of the user. The connector portion 102 of the tape tabs 186 are then placed adjacent the landing member 44, placing the outer surface 76 of the second end region such that the hook fastener material 616 and the cohesive 618 of the first fastener portion. 612 of the first fastener element 88, which is disposed on the clamping surface 90 of the tongue 186, will respectively link the nonwoven material 24 and the cohesive material 26 of the landing member 44 to form a side closure. Although particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the scope and spirit of the invention. Therefore, it is intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

Claims (17)

1. A fastening system with two mechanisms, primary comprising: a first fastener portion comprising: (1) a hook fastener material having a base surface area and a hook surface area, (i) a first cohesive portion coated on at least a portion of said hook fastening material; and a second fastener portion comprising: (i) a receiving material engageable with said hook fastening material, (ii) a second cohesive portion coated on at least a portion of said receiving material engageable with said first cohesive portion, whereby when said first and second fastener portions are engaged, said first and second cohesive portions are joined together.

2. The primary fastener system according to claim 1, wherein said first cohesive portion is coated on at least a portion of said hook surface area.

3. The primary fastening system according to claim 1, wherein said first cohesive portion is coated in said base surface area of said hook fastening material.

4. The primary fastening system according to claim 3, wherein said first cohesive portion is coated on both of said hook surface area and said base surface area and said hook fastening material.

5. - The primary fastener system according to claim 2, wherein said hook surface area includes a portion of surface area facing said base surface area and coated with said first cohesive portion. 6.- The primary fastening system in accordance with the claim 2, wherein said hook surface area includes a portion of surface area oriented away from said base surface area and coated with said first cohesive portion. 7. The primary fastening system according to claim 1, wherein said primary fastener system has a shear strength of at least about 2,000 g / in2 and a peel strength of no more than about 5,000 g / in2, when said first mechanical and cohesive portions are coupled with said second respective cohesive mechanical portions. A method of fastening using a primary fastener system comprising the steps of: a) providing a first portion of the fastener comprising: i) a hook fastener material, and ii) a first cohesive portion coated in at least a portion of said hook fastener material; b) providing a second portion of the fastener comprising: i) a receiving material engageable with said hook fastening material, and ii) a second cohesive portion; and c) contacting said first portion of the fastener in said second portion of the fastener, for coupling said first portion of the fastener to said second portion of the fastener to provide a closed primary system. The method according to claim 8, wherein the hook fastening material has a base surface area and a hook surface area, and said first cohesive portion is coated on at least a portion of said hook fastening material. . The method according to claim 9, wherein said first cohesive portion is coated on said base surface area of said hook fastening material. The method according to claim 10, wherein said first cohesive portion is coated on both said hook surface area and said base surface area of said hook fastening material. The method according to claim 9, wherein said first cohesive portion is coated on said hook surface area of said hook fastening material. 13. The method according to claim 8, wherein said closed primary fastener has a peel strength of less than about 5000 g / in2, and a shear strength of at least about 2000 g / in2. A disposable absorbent article comprising an absorbent structure and a primary fastening system, said primary fastening system comprising: a first portion of the fastener comprising (i) a hook fastening material, (ii) a first cohesive portion coated in at least one a portion of said hook fastener material; and a second portion of the fastener comprising (i) a receiving material engageable with said hook fastening material, (ii) a second cohesive portion engageable with said first cohesive portion, whereby when coupling said first and second portions of the fastener are join said first and second cohesive portions together. 15. The absorbent article according to claim 14, wherein said hook fastener material has a base surface area and a hook surface area, and said first cohesive portion is coated on at least a portion of said surface area of the hook. hook. 1

6. The absorbent article according to claim 15, wherein said first cohesive portion is coated on said base surface area of said hook fastening material. The absorbent article according to claim 14, wherein said absorbent structure comprises a body portion having an inner surface, an outer surface, longitudinal edges, end edges, a first end region and a second end region, said portion of body comprising a liquid-permeable top sheet, a liquid-impermeable back sheet bonded to said top sheet and an absorbent core disposed between said back sheet and said top sheet, and said primary fastener system comprising: (i) first and second reed tabs; tape, each joined respectively to said first and second longitudinal edges in said first end region, each of said tape tabs having said hook fastening material and said first cohesive portion disposed thereon, and (li) first and second members of said tape. landing, each respectively capable of coupling with said first and second unite tape tabs, each disposed on said outer surface in said second end region, each of said landing member having said fibrous nonwoven material and said second cohesive portion disposed thereon.