JP2013064221A - Fastening device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanical fastening device having an engagement component and a receiving component.SOLUTION: The receiving component includes a first bonding line 110, a second bonding line 112, a bonding zone, and a plurality of continuous sweeping regions 140, 142, 144, 146. The second bonding line 112 is arranged adjacently to the first bonding line such that a part of the second bonding line 112 overlaps a part of the first bonding line 110. The bonding zone 130 surrounds the first bonding line 110 and the second bonding line 112. The plurality of continuous sweeping regions 140, 142, 144, 146 are arranged in the bonding zone 130. At least one sweeping region includes a part of both the first bonding line 110 and the second bonding line 112, and the rest sweeping regions include a part of at least the first or the second bonding line 110, 112. The receiving component 100 has a bond ratio of 1 or more to 20 or less.

Description

  The present invention relates to a fastening device. Strictly speaking, the present invention relates to a receiving component for use with a suitable engagement component in a fastening device.

  The present invention was made in accordance with a joint research agreement between Procter & Gamble and Mitsui Chemicals.

  Refastenable mechanical fastening devices can be used in a wide variety of applications. For example, such a refastenable fastening device can be used to connect one part of a disposable absorbent article to another part of a disposable absorbent article.

  In general, a mechanical fastening device includes a receiving / female member and an engagement / male member. In some mechanical fastening devices, the engagement member comprises a plurality of hook elements and the receiving member comprises a plurality of loop elements. In the clamped state, the hook element is generally intertwined with the loop element so that a coupling between the engaging and receiving components is formed.

  Nonwoven webs are known in the art as materials that may be used as female members. Generally, the nonwoven female member includes a plurality of polymer fibers. These fiber portions can be joined by fiber-to-fiber bonding to form a web having a sufficient amount of available non-adhesive fibers or non-adhesive areas of adhesive fibers as well as web integrity. Fiber-to-fiber bonding is generally formed by partially melting the fibers together, for example, with heat, pressure, or sonic (ie, ultrasonic) energy.

  In some processes, a pair of heated calender rolls can be used to make these fibers / fiber bonds. In general, one of the calendar rolls has a plurality of protrusions extending outward from its outer surface. A constant force is generally applied to one of the calendar rolls such that the protrusions exert pressure on the nonwoven web as it passes between the calender rolls. Generally, at least one fiber / fiber bond is made at a location where pressure is applied.

  In general, nonwoven webs used as receiving components are not fully bonded, such as 100% fiber-to-fiber bonding. In general, fiber-to-fiber bonding prevents the bonded area from being engaged by the engaging component, so that the non-woven web is fully bonded can result in a poor performing receiving component. Therefore, the protrusions extending outward from the outer surface of the calendar roll are generally spaced so that a special pattern is created on the nonwoven fabric.

  Furthermore, wherever the hook from the engagement component is placed, a large, gapless non-bonded to ensure that a non-adhesive fiber or non-adhesive area of adhesive fiber is obtained to engage the hook. It is preferable to have an adhesive area. However, an adhesive pattern that creates a large, interstitial non-adhesive area may have reduced cross-machine strength due to a decrease in the number of fibers and fiber bonds in the non-adhesive area. To compensate for this, some adhesive patterns can be entirely enclosed, for example, areas where fully bonded fibers surround unadhered fibers. However, an adhesive pattern that creates a fully bonded fiber surrounding the non-adhesive fibers can reduce the likelihood of finding non-adhesive fibers that can be engaged by hooks from the engaging components.

  Furthermore, such an adhesive pattern can negatively affect the quality of the fiber / fiber adhesion. For example, since the conventional adhesive pattern does not fully bond the nonwoven web, the pressure on the nonwoven web may vary as the nonwoven web passes through the calendar roll. In some cases, pressure fluctuations can cause higher pressure at one fiber / fiber bond site and lower pressure at another fiber / fiber bond site. Higher pressure can result in overbonding or fiber cutting (weakening the resulting web). A lower pressure can result in the formation of a smaller percentage of bonded areas, lower adhesion strength, and / or lower adhesion quality compared to the desired percentage of bonded areas. In addition, lower pressures may reduce the cross machine strength.

  As a result, a fastening device is provided comprising a receiving component having an adhesive pattern that reduces the pressure fluctuations experienced by the receiving component in the process while maintaining a sufficient area of non-adhesive fibers and / or non-adhesive areas of adhesive fibers. There is a need to.

  The present invention relates to a mechanical fastening device comprising an engaging component and a receiving component. The engagement component includes a plurality of engagement elements. A plurality of engaging components can engage the receiving component, the receiving component having a longitudinal axis and a horizontal axis.

  The receiving component further includes a first bond line, a second bond line, a bond zone, and a plurality of consecutive sweep regions. The second bonding line is disposed adjacent to the first bonding line so that a part of the second bonding line overlaps with a part of the first bonding line, and the first bonding line and the second bonding line are in the first direction. To grow. The overlap is generally parallel to a second direction that is generally perpendicular to the first direction.

  The bond zone surrounds the first bond line and the second bond line. A plurality of consecutive sweep regions are disposed within the adhesion zone. Each sweep region extends in a direction substantially parallel to the longitudinal axis, and each sweep region includes a length and a width. The length of the sweep area is equal and the width of the sweep area is equal. The at least one sweep region includes a portion of both the first bond line and the second bond line, and the remaining sweep region of the plurality of sweep regions is at least a portion of the first bond line or at least one of the second bond lines. Part. Each sweep region has an adhesive area, and the receiving component has an adhesion ratio between about 1 and about 20 between the two sweep regions.

Definition:
As used herein, the terms “absorbent article” and “article” refer to a wearable device that absorbs and / or contains liquid, and more specifically, in contact with or in close proximity to the wearer's body. Refers to devices that are placed and absorb and contain various effluents excreted from the body. Suitable examples include diapers, training pants, refastenable pants, pull-on underwear, adult incontinence products, and feminine care products such as sanitary napkins. Furthermore, the terms “absorbent article” and “article” are intended to be discarded after 10 uses, preferably after 5 uses, more preferably after 1 use and are washed. Or “disposable absorbent articles” that are not intended to be restored otherwise (although certain components may be reused, reused, or composted).

  “Facing the body”, “facing the wearer”, “facing the exterior”, and “facing the garment” each refer to the relative positional relationship of the element or element surface or group of elements . “Body facing” and “facing the wearer” indicate that the element or surface is closer to the wearer than other elements or surfaces when worn. “Clothing facing” and “external facing” mean that an element or surface is farther from the wearer when worn than other elements or surfaces (ie, the element or surface is disposable absorbent) Closest to the wearer's clothing worn on the article).

  As used herein, the term “bond line” refers to a plurality of sites on a substrate where the fibers of the substrate are fused together. Multiple sites are melted together to form a “line”. However, the term “line”, as used herein, can also describe a series of discrete points or short lines that are closely spaced so as to be effectively close to a single line. Thus, although those skilled in the art have described a solid line adhesive pattern, the advantages of the present invention are similar due to the close spacing or discontinuous line fragments that are virtually close to the line. I know that can be achieved.

  As used herein, the term “bond line pattern” refers to at least two bond lines with some overlap between at least two bond lines.

  As used herein, the term “continuous” means from one to the next. For example, adjacent sweep regions of the present invention may share the boundaries of each other.

  As used herein, the term “crimp” refers to a feature of a fiber having at least one fold or ridge. The term “crimp” includes fibers that have multiple folds, fibers that have crimps, and / or fibers that form a spiral or helical structure.

  The term “diaper” as used herein is generally intended for infants and incontinent persons to wear around the lower torso around the waist and legs and to receive and contain urine and fecal excretion. Refers to an absorbent article that is particularly adapted. The term “diaper” as used herein also includes “pants” as defined below.

  “Elastic extensibility” as used herein refers to the property of an extensible material that has the force to return to approximately its original dimensions after removing the force that stretched the extensible material. As used herein, a material or element described as “extensible” may also be “elastically extensible” unless otherwise specified.

  As used herein, the term “joined” refers to a configuration in which an element is secured directly to another element by directly securing the element to another element, as well as an element in the intermediate member ( One or more), which in turn is secured to another element, thereby including that element is indirectly secured to another element.

  The term “longitudinal” is used herein to refer to a direction substantially parallel to the longest edge of an element, unless otherwise stated. In the context of a disposable absorbent article, the “longitudinal” direction extends from the waist edge substantially perpendicular to the opposite waist edge of the article and substantially parallel to the maximum linear dimension of the article. The direction within ± 45 degrees of the longitudinal direction is considered to be the “longitudinal direction”.

  The term “lateral” refers to a direction that is substantially perpendicular to and in the same plane as the “longitudinal” direction. In disposable absorbent articles, the “lateral” direction passes from one longitudinal edge of the article to the opposite longitudinal edge of the article. Directions within ± 45 ° of the lateral direction are considered to be “lateral”.

  The term “machine direction” or “MD” refers to a direction generally parallel to the forward direction of a material, member, element, item, component, etc. that undergoes processing. For example, nonwoven fabrics are generally formed with a machine direction that matches the length of manufacture or the winding direction. The machine direction can also be the main direction of fiber orientation in the nonwoven fabric.

  The term “cross-machine direction” or “CD” refers to a direction that is substantially perpendicular to and in the same plane as the machine direction.

  As used herein, the terms “pants”, “training pants”, “closed diapers”, “pre-tightened diapers”, and “pull-on diapers” are designed for infant or adult wearers Refers to a disposable garment having a waist opening and leg openings. The pants may be configured to have a waist opening and leg openings that are closed before the pants are worn on the wearer, or the pants are closed at the waist opening while on the wearer. The leg opening may be formed. The pants may be preformed by any suitable technique that encloses, but is not limited to, parts of the article together using a fastening device that can be pre-fastened. The pants may be formed in advance (eg, side fastening, front waist fastening, rear waist fastening) at any location along the periphery of the article. Examples of suitable pants are US Pat. No. 5,246,433, US Pat. No. 5,569,234, US Pat. No. 6,120,487, US Pat. No. 6,120,489, US Pat. 4,940,464, U.S. Pat. No. 5,092,861, U.S. Pat. No. 5,897,545, U.S. Pat. No. 5,957,908, and U.S. Patent Publication No. 2003 / 0233082A1. Yes.

Description:
Fastening devices made in accordance with the present invention include a receiving component that can reduce pressure fluctuations that may occur during manufacture of the receiving component. In particular, receiving components made in accordance with the present invention include an adhesive pattern that can reduce pressure fluctuations encountered by the receiving component during the manufacturing process. Furthermore, the receiving component made in accordance with the present invention has a sufficient area of non-bonded fibers and / or non-bonded areas of bonded fibers so that the receiving components can be used with suitable engaging components in a fastening device. Can hold.

  As shown in FIG. 1A, a fastening device 10 made in accordance with the present invention may include an engaging component 12 and a receiving component 100. The engagement component 12 may include a plurality of hooks 14 that extend outwardly from the engagement surface 16. The receiving component 100 may include a plurality of looped fibers (not shown) that can become intertwined with the plurality of hooks 14 of the engaging component 12. Examples of suitable engagement components are discussed below.

  The fastening device 10 can be used with a variety of consumer and commercial products that benefit from having the fastening device of the present invention. Some examples of articles that may utilize the fastening device of the present invention include disposable absorbent articles, body coverings, packaging, and industrial joints for abrasive pads, medical products, and the like.

  As shown in FIG. 1B, a receiving component 100 made in accordance with the present invention may include a plurality of bond lines, a bond zone 130, and a plurality of continuous sweep regions. In some embodiments, the receiving component 100 may include a first bond line 110, a second bond line 112, and a third bond line 114. Embodiments having more than three bond lines and less than three bond lines are also contemplated.

  In some embodiments, the first bond line 110 may be disposed adjacent to the first end edge 151 and the second bond line 112 may be disposed adjacent to the first bond line 110. In some embodiments, the third bond line 114 may be disposed adjacent to the second end edge 152 and adjacent to the second bond line 112. In some embodiments, the first end edge 151 and the second end edge can extend from the first longitudinal edge 170 to the second longitudinal edge 172 in a direction generally parallel to the transverse axis 162. .

  As shown in some embodiments, the first bond line 110, the second bond line 112, and the third bond line 114 extend from the first longitudinal edge 170 to the second longitudinal edge of the receiving component 100. It can extend in the first direction 1222 up to 172. In some embodiments, the first direction 1222 may be substantially parallel to the horizontal axis 162. The first longitudinal edge 170 and the second longitudinal edge 172 may extend between the first end edge 151 and the second end edge 152 in a direction substantially parallel to the longitudinal axis 160.

  The receiving component 100 further includes an adhesive zone 130. Bond zone 130 surrounds more than one bond line. For example, as shown, the bond zone 130 can surround the first bond line 110 and the second bond line 112. In some embodiments, the bond zone 130 may comprise a rectangle that contacts the outermost point of the first bond line 110 and the outermost point of the second bond line 112. In some embodiments, the outermost point of the first bond line 110 is closest to the first end edge 151, closest to the first longitudinal edge 170, and closest to the second longitudinal edge 172. It is a point on the first primary bond line 110 that is close. Similarly, in some embodiments, the outermost point of the second bond line 112 is closest to the second end edge 152, the first longitudinal edge 170, and the second longitudinal edge 172, 2 on the bond line 112. In some embodiments, the third bond line 114 may overlap within the bond zone 130 adjacent to the second boundary 134 of the bond zone 130. In some embodiments, the additional bond line may overlap within the bond zone 130 adjacent to either the first boundary 132 or the second boundary 134.

  A plurality of consecutive sweep regions 140, 142, 144, and 146 can be disposed in the adhesive zone 130. The sweep region includes a portion of the receiving component 100 and is used to analyze the total area of the bonded area and the receiving component 100 portion within the sweep region. The advantage of a shorter length 175 sweep region is that more data points can be collected which are essentially on the bond line. A large number of data points can increase the accuracy of the calculation of the variability of the bonded area within the receiving component 100. The cumulative length 175 of the sweep regions 140, 142, 144, and 146 is equal to the length of the adhesive zone 130.

  Each sweep region 140, 142, 144, and 146 includes a portion of the first bond line 110 and / or the second bond line 112. In some embodiments, some of the continuous sweep regions 140, 142, 144, and 146 overlap within the adhesive zone 130 adjacent to either the first end edge 151 or the second end edge 152. Some of the additional bond lines may be included. For example, the sweep region 146 may further include a portion of the third bond line 114 because the third bond line 114 overlaps the bond zone 130.

  The at least one sweep region includes a portion of both the first bond line 110 and the second bond line 112. For example, in some embodiments, as shown, the two sweep regions, 142 and 144, include a portion of the first bond line 110 and the second bond line 112. Depending on the size of the sweep area, one or more sweep areas may include a portion of more than one bond line. Embodiments consisting of more than four sweep regions and fewer than four sweep regions are contemplated.

  Because sweep regions 140, 142, 144, and 146 are continuous, each sweep region shares a boundary with an adjacent sweep region. For example, the sweep region 140 shares a boundary with the sweep region 142. Similarly, the sweep region 144 shares a boundary with the sweep region 142. However, the sweep regions 140, 142, 144, and 146 are arranged such that the odd (first and third) sweep regions, eg, 140 and 144, do not share a boundary. Further, the sweep regions 140, 142, 144, and 146 are arranged such that even (second and fourth) sweep regions, eg, 142 and 146, do not share a boundary.

  The continuous sweep regions 140, 142, 144, and 146 are rectangular and extend from the first longitudinal edge 170 to the second longitudinal edge 172 of the receiving component 100. The continuous sweep regions 140, 142, 144, and 146 have a width 177 that can be equal to the width of the web of fibrous material that the receiving component comprises. The width 177 can be substantially parallel to the horizontal axis 162. In some embodiments, the sweep regions 140, 142, 144, and 146 can have a length 175 that is equal to the contact length 250 between calendar rolls (shown in FIG. 2B). In some embodiments, the sweep regions 140, 142, 144, and 146 can have a length 175 that is less than the contact length 250 (shown in FIG. 2B). In some embodiments, the length 175 can vary from about 0.1 mm to about 1.2 mm, or any individual number within this range. The length 175 may be substantially parallel to the longitudinal axis 160.

  Each sweep region 140, 142, 144, and 146 has a length 175 equal to the length 175 of the adjacent sweep region. As further illustrated, in some embodiments, the sweep region 140 may share the first boundary 132 with the adhesive zone 130. Also, in some embodiments, the sweep region 146 may share the second boundary 134 with the adhesive zone 130.

  Each sweep region 140, 142, 144, and 146 includes an adhesive area defined by an adhesive pattern. The percentage of bonded area in the sweep region is a measure of fiber to fiber adhesion within the sweep region. In particular, the percentage of bonded area is determined by calculating the area of fiber-fiber bonding within a particular sweep region and dividing this area by the total area of the sweep region and multiplying by 100.

  The adhesion area of the sweep regions 140, 142, 144, and 146 can vary. The variability of the amount of bonded area between sweep regions 140, 142, 144, and 146 is determined by comparing the value of the maximum bonded area of a sweep region with the value of the minimum bonded area of another sweep region. I can decide. The ratio of the maximum adhesion area to the minimum adhesion area between any two sweep regions is termed the adhesion ratio. In some embodiments, the adhesion ratio is greater than or equal to about 1, less than about 20, or any individual value within such a range. In other embodiments, the adhesion ratio is about 1 or more and about 10 or less. In other embodiments, the adhesion ratio is about 1 or more and about 3 or less. In some embodiments where the adhesion ratio is 1, it may not be a maximum adhesion area value or a minimum adhesion area value. In this case, one bonded area value may be divided by another bonded area value.

  A cumulative adhesion area can be provided by adding the adhesion area of each individual sweep region. Adding the total area of each individual sweep region can provide a cumulative total area. In some embodiments, the total bonded area can be provided by dividing the cumulative bonded area by the total accumulated area, or in other embodiments providing the total bonded area of the receiving component 100. be able to.

  As shown in FIGS. 2A and 2B, the adhesive lines of receiving component 100 (shown in FIG. 1), such as 110 (shown in FIG. 1B), 112, and 114, in some embodiments, are calendars. Formed via device 200. The calendar device 200 may include a pair of calendar rolls 202 and 204 that form a nip therebetween. The outer surface of calendar roll 202 and / or calendar roll 204 may include protrusions (not shown) that extend outwardly from the outer surface. These protrusions typically create a fiber-fiber bond to the web 275 made of fiber material as the web 275 made of fiber material passes through the nip. The receiving component 100 (shown in FIGS. 1A and 1B) may include a portion of a web 275 of fibrous material.

  A web 275 of fibrous material passes through the calendar rolls 202 and 204 in a direction generally parallel to the longitudinal axis 160 (shown in FIG. 1B) of the receiving component 100 (shown in FIGS. 1A and 1B). be able to. In particular, the longitudinal axis 160 (shown in FIG. 1B) of the receiving component 100 (shown in FIGS. 1A and 1B) can be substantially parallel to the machine direction of the calendar device 200. Calendar rolls 202 and 204 can rotate in the directions indicated by arrows 280 and 281 (shown in FIG. 2B), respectively.

  In some embodiments, calendar rolls 202 and / or 204 can be heated. Calendar rolls 202 and 204 can provide energy to web 275 made of fibrous material as web 275 made of fibrous material passes through the nip. Further, in some embodiments, a force 240 can be applied to the calendar rolls 202 and / or 204 such that pressure is applied to the web as the web 275 of fibrous material passes through the nip. The force 240 applied to the calendar rolls 202 and / or 204 will be discussed later.

The surface-to-surface contact of calendar rolls 202 and 204 can define a contact length 250. The contact length 250 is the calender roll 202 that is in contact with the web 275 of fiber material (shown in FIG. 2A) as the web 275 of fiber material (shown in FIG. 2A) passes through the nip. And a part of the calendar roll 204. In some embodiments, contact length 250 is determined by the Hertz equation below. The Hertz equation assumes that the calendar rolls 202 and 204 are made of a homogeneous and isotropic material, and further assumes the validity of Hook's law. Other assumptions are that the calendar rolls 202 and 204 have equal diameters, that the calendar rolls 202 and 204 are made of the same elastic modulus, and that the width 220 of the calendar rolls 202 and 204 is at least in the sweep region. Including the same width as width 177 (shown in FIG. 1B). The contact length 250 is obtained by the following formula:
Where X is half the width of the contact area 250;
R is the radius in millimeters of calendar rolls 202 and 204;
F is the force applied in Newton / mm,
E is the elastic modulus of the material of calendar rolls 202 and 204;
L is the width of calendar rolls 202 and 204 (shown as 220), and ν is the Poisson's ratio.

  If the calendar rolls do not have equal diameters, one of ordinary skill in the art can redirect the above equation to account for the unequal diameters of the calendar rolls. If the calendar roll is not made from a material with equal modulus, one of ordinary skill in the art can redirect the above equation to account for the unequal modulus of the calendar roll.

In some embodiments where the calendar roll is made of steel, the modulus E can be equal to 210,000 N / mm ² , so the Poisson's ratio is 0.3 and the applied force is about 0 0.03 N / m to about 0.15 N / m (about 30 N / mm to about 150 N / mm). As mentioned above, X is equal to 1/2 of the contact length 250. Thus, twice X provides a contact length of 250. In some embodiments, the contact area 250 may be in the range of about 0.1 mm to about 1.2 mm, or any individual value within this range. In some embodiments, the contact area 250 is in the range of about 0.7 mm to about 1.0 mm.

  One advantage of the present invention is that pressure fluctuations during the calendar process can be reduced due to the ratio of the larger bonded area to the smaller bonded area of the present invention. For example, in a conventional receiving component where the bonded area changes to over 2000% between sweep regions, the contact area of the calendar roll that creates these bonded areas also changes to over 2000%. As a result, even if the force applied to the calendar roll is constant, the pressure applied to the web made from the fibrous material as it passes through the nip of the calendar roll will also vary to over 2000%. In conventional receiving components, when several sweep regions contain 0% bonded area, the ratio of the larger bonded area to the smaller bonded area is therefore infinite, with pressure fluctuations greater than 2000%. Can happen. Zero percent bonded area occurs, for example, when the first and second bonded lines are separated by a finite distance at least equal to the length of the sweep region in a direction generally parallel to the longitudinal axis of the receiving component. obtain. In another embodiment, pressure fluctuations greater than 2000% can still occur where there is too much or too little overlap between the bond lines. The overlap between bond lines is further discussed in connection with FIG.

  From a process point of view, pressure fluctuations greater than 2000% can cause process instability. For example, extreme pressure fluctuations can cause premature failure of protrusions on the calendar roll.

  From the viewpoint of product / material performance, a pressure fluctuation of more than 2000% is generally not preferable. For example, a swept region with 0% bonded area can only provide the result of low shear and potentially poor refastening capabilities. In particular, because fewer loose fiber ends are glued into this sweep region, this can result in fuzz during repeated opening and closing with a suitable engagement component.

  Also, a sweep region with 0% bonded area can reduce the strength in a direction parallel to the horizontal axis of the receiving component. In some embodiments, the horizontal axis of the receiving component can often be associated with the direction of the shear force. For example, in the clamped state, the horizontal axis of the receiving component can generally be parallel to the direction of the shear force. For example, referring temporarily to FIG. 8A, in the clamped state, the shear force can act along a main direction of shear 775 that is generally parallel to the transverse axis of the receiving component 740. Where there is no overlap between adjacent bond lines, the receiving component material between adjacent bond lines is free to move even when shear forces are applied.

  In contrast, where the overlap between bond lines causes pressure fluctuations greater than 2000%, the concentration of fiber to fiber bond sites in the overlap region generally results in poor tightness. For example, as previously mentioned, the engaging component generally cannot engage the receiving component in the adhesive area.

  As discussed further above, pressure fluctuations greater than 2000% can cause adhesion quality fluctuations. When the pressure fluctuation is larger than 2000%, the fiber / fiber bonding in the sweep region having the smaller bonding area may receive a higher pressure than the sweep region having the larger bonding area, and the high pressure may cause a hole. Also, fiber / fiber bonds in a swept area with a larger bonded area are subject to lower pressure than a swept area with a smaller bonded area, which may result in fewer fiber / fiber bonds due to low pressure. In particular, in some cases, the low pressure may actually simply compress instead of gluing the fibers.

  As shown in FIG. 2C, receiving component 30 was created in accordance with the present invention, resulting in several defects, such as 32, 34, 36, 38, 40, and 42. The adhesion ratio of the receiving component 30 was about 1.8. It is believed that there is an acceptable number of defects at a ratio of about 20 or less. However, an unacceptable amount of defects often occurs in the receiving component for adhesion ratios greater than 20, and is therefore outside the scope of the present invention.

  In contrast to conventional receiving components, receiving components made in accordance with the present invention reduce pressure fluctuations to less than about 2000%. The reduction in pressure fluctuations can be achieved to some extent by ensuring that the adhesive area of the receiving component includes a plurality of sweep regions each having a limited amount of adhesive area. Further, for a receiving component made in accordance with the present invention, the sweep region constitutes a bonded area percentage that reduces pressure fluctuations to less than about 2000%.

  There are several factors that can affect the ratio of larger bonded area to smaller bonded area. Some factors include bond line overlap, in some embodiments, bond line orientation angle, bond line period, and in some embodiments, bond line orientation in the process. The orientation of the bond line during the process is further discussed in connection with FIG.

  As shown in FIG. 3, the overlap 320 is the distance between the first reference line 302 and the second reference line 304. In some embodiments, the overlap 320 is generally parallel to the longitudinal axis 160 and substantially parallel to the second direction 1223. In some embodiments, the first reference line 302 can be drawn between the two most internal points 308 and 310 on the first bond line and can be substantially parallel to the horizontal axis 162. In some embodiments, the second reference line 304 can be drawn between the two innermost points 312 and 314 of the second bond line 112 and can be substantially parallel to the horizontal axis 162. In some embodiments, the innermost points 308 and 310 of the first bond line 110 may be the points closest to the second bond line 112. Similarly, in some embodiments, the innermost points 312 and 314 of the second bond line 112 may be the points closest to the first bond line 110. Where the first bonding line 110 does not intersect the second reference line 304 and where the second bonding line 112 does not intersect the first reference line 302, the first bonding line 110 and the second bonding line 112 do not overlap.

  Further, FIG. 3 shows a period 330, an orientation angle 350, a bond line spacing 370, and a bond line thickness 360. In some embodiments, the period 330 is the smallest distance that the periodic function has the same value. As shown, in some embodiments, the period 330 may be the distance from the first peak 332 of the third bond line 114 to the second peak 334 of the third bond line 114. In embodiments where the first bond line 110 and the second bond line 112 are similar to the third bond line 114, the period 330 can be found in the same way for the first bond line 110 and the second bond line 112. it can. Where a portion of the first bond line 110 intersects the first reference line 302, an orientation angle 350 is also shown.

  Bond line spacing 370 is the distance between the first and second bond lines 110 and 112. For example, in some embodiments, the bond line spacing 370 can be measured from the innermost point 308 of the first bond line 110 to the outermost point 372 of the second bond line 112. In some embodiments, the outermost point 372 of the second bond line 112 may be the point closest to the third bond line 114. In some embodiments, the bond line spacing 370 is substantially parallel to the longitudinal axis 160. Any suitable spacing may be used. For example, the spacing 370 between bond lines may be in the range of about 1 mm to about 20 mm, or may be any individual number within the range. As yet another example, the spacing 370 may be between about 3 mm and about 18 mm. As yet another example, the spacing 370 may be between about 6 mm and 12 mm.

  Similarly, any suitable bond line thickness 360 can be utilized. For example, in some embodiments, the bond line thickness 360 may be in the range of about 0.2 mm to about 5 mm, or may be any individual number within the range. In some embodiments, the bond line thickness 360 may range from about 0.5 mm to about 2 mm. In some embodiments, the bond line thickness 360 may range from about 1 mm to about 1.5 mm.

  Any suitable period 330 may be used in connection with the present invention. For example, in some embodiments, the period 330 may be in the range of about 1 mm to about 20 mm, or may be any individual number within the range. In some embodiments, the period 330 may range from about 1.5 mm to about 15 mm. In some embodiments, the period 330 may range from about 5 mm to about 12 mm.

The effect of bond line overlap on the ratio of larger bonded area to smaller bonded area is shown in Table I. Table I contains prophetic examples, and all calculations contained in Table I are based on a zigzag bond line pattern similar to the bond line pattern shown in FIG.

  As shown in Table I and previously discussed (see Example 3), where the bond line overlap is equal to zero, the ratio of the larger bond area to the smaller bond area may be Can be infinite. In contrast, in an embodiment of the present invention, the first bond line 110 (shown in FIG. 1) and the second bond line 112 (shown in FIG. 1) overlap by a finite amount. Looking at Examples 1 and 4, as shown, the ratio of larger bonded area to smaller bonded area decreases as the overlap increases.

  Overlap is affected by the thickness of the bond line. For example, in Table I, the overlap between bond lines decreases in the same way as the thickness of the bond lines decreases (see Examples 1 and 2). Furthermore, the thickness of all bond lines in a pattern can be varied as desired to adjust the overall bond area percentage of the bond pattern. Similarly, the overlap is affected by the spacing of the bond lines. For example, in Table I, the overlap between bond lines decreases as the spacing between bond lines increases (see Examples 1 and 4, 2 and 5).

The effect that orientation angle 350 has on the ratio of larger bonded area to smaller bonded area is shown in Table II. Table II contains prophetic examples, and all calculations contained in Table II are based on a zigzag bond line pattern similar to the bond line pattern shown in FIG.

  For the embodiment shown above, the orientation angle 350 (shown in FIG. 3) is varied for the zigzag bond pattern shown in FIG. As shown, the orientation angle 350 (shown in FIG. 3) can be moved from about 75 degrees to about 45 degrees while maintaining an overlap of about 2.5 mm for most embodiments. The line spacing was also varied for each orientation angle 350 (shown in FIG. 3) to ensure an equal amount of overlap for most examples. In some examples, the period and bond line thickness were kept constant.

  In Example 6, the orientation angle was 75 degrees, which resulted in the smallest adhesion area of 20.7% as a whole in comparison with the other examples in Table II. Without being bound by theory, when the overlap is kept constant at about 2.5 mm, this low percentage bonded area is the result of a line spacing of 18.7 mm, a line thickness of 1 mm, and a period of 9.3 mm. Is believed.

  As shown in Example 7, when the orientation angle is 65 degrees while maintaining the overlap at 2.5 mm, the total proportion of the adhesion area can be increased to 24.1% at a line interval of 9.8 mm. Decreasing the orientation angle by about 10 degrees from Example 6 can reduce the ratio of larger bonded area to smaller bonded area from 1.53 to 1.07.

  In accordance with the present invention, in some embodiments, the orientation angle 350 may be in the range of about 45 degrees to about 75 degrees, or may be any individual number within the range. In other embodiments, the orientation angle 350 may range from about 55 degrees to about 65 degrees. In still other embodiments, the orientation angle 350 may range from about 60 degrees to about 65 degrees.

  Example 11 shows, in one particular embodiment, how to make the larger / smaller bond area ratio equal to 1.0 for a zigzag bond line pattern similar to that shown in FIG. Explains what can be done. In some embodiments, the greater / smaller bond area ratio can be equal to about 1.0 by adjusting the bond line thickness in areas where the bond lines do not overlap. Based on the parameters and the relationship of these parameters discussed herein, at least one parameter and / or between parameters to obtain a ratio of a larger bonded area to a smaller bonded area of about 1.0. It is possible to change the relationship.

The effect of the period on the ratio of larger bonded area to smaller bonded area is described in Table III. Table III contains prophetic examples, and all calculations contained in Table III are based on a zigzag bond line pattern similar to the bond line pattern shown in FIG.

  With an equal percentage of total bonded area, the determined ratio of larger bonded area to smaller bonded area was 1.07 for a period equal to 7. The overlap for Example 13 can be about 1.9 mm. Based on the data in Table III, in some embodiments, the period may be in the range of about 5 mm to about 11 mm, or any number within the range. In other embodiments, the period may be from about 6 mm to about 8 mm. In yet other embodiments, the period may be about 7 mm.

  As shown in Examples 17-20, the bond line spacing may be adjusted so that the total bond area is affected. In some embodiments of the present invention, the total bonded area may be in the range of about 10% to about 50%, or any number within the range. In other embodiments, the percentage of total bonded area may be between about 20% and about 30%. In yet other embodiments, the percentage of total bonded area may be between about 20% and about 25%. In other embodiments, the total bonded area may be less than about 40%, while the bonded area in any sweep region is less than about 60%. In other embodiments, the total bonded area may be less than about 30%, while the bonded area in any sweep region may be less than about 50%. In still other embodiments, the total bonded area may be between about 20% and about 30%, while the bonded area in any sweep region is less than about 40%.

  As stated previously, the data in Tables I, II, and III are based on a zigzag bond line pattern similar to the bond line shown in FIG. However, one skilled in the art can calculate values for the parameters described in Tables I, II, and III for any given bond line or variations thereof. For example, for simple, eg, straight, straight line geometries, the values shown in Tables I, II, and III appear to have been made for the bond line patterns shown so far. In addition, it can be calculated using geometric and trigonometric relations of straight lines connected at a certain angle. For more complex patterns, such as bond line patterns as shown in FIGS. 4A-4C or including shapes such as those of FIGS. 5B-5E, the values in Tables I, II, and III are computer Can be obtained using a simplified image analysis.

  In computerized image analysis, the adhesive pattern in question is digitized to ensure that color contrast can be measured to determine the location of bonded and non-bonded areas. For example, non-bonded areas may be represented as white pixels and bonded areas may be represented as black pixels. The number of pixels representing the bonded area can be counted and compared to the number of pixels representing the non-bonded area to determine the percentage of the bonded area. Similarly, period, overlap, bond line thickness, orientation angle, and line spacing can also be measured using computerized image analysis.

  Further, any data or trends discussed in connection with Tables I, II, and III relate to analyzed bond line patterns, such as zigzag patterns. As a result, any data and / or trends discussed in connection with Tables I, II, and III may not be valid for other bond line patterns.

  As shown in FIGS. 4A-4C, the overlap between adjacent bond lines can be achieved in many different ways. For example, as shown in FIG. 4A, a receiving component 400A made in accordance with the present invention may include a first bond line 410A and a second bond line 412A. The first bonding line 410A and the second bonding line 412A may each include a plurality of repeating units 510A. The repeat units 510A of the first bond line 410A and the second bond line 412A may overlap each other in some embodiments by extensions 520 that extend substantially parallel to the direction of the longitudinal axis 160 from each repeat unit 510A. . Also, as shown, in some embodiments, the first and second bond lines 410A and 412B may include extensions 520 that extend in a direction generally parallel to the longitudinal axis 160 between the repeat units 510A.

  In some embodiments, the extension 520 may extend in an inclined orientation with respect to the longitudinal axis 160. In some embodiments, the extension angle 1350 (shown in FIG. 4C) may be in the range of greater than about 0 degrees and less than about 180 degrees, or any numerical value within the range. In still other embodiments, the extension angle 1350 (shown in FIG. 4C) may be in the range of about 30 degrees and about 150 degrees or less. In still other embodiments, the extension angle 1350 may range from about 60 degrees to about 120 degrees. In some embodiments, all bond line extension angles 1350 may be similar. In some embodiments, the extension angle 1350 may vary between bond lines of a bond pattern. Further, in some embodiments, the extension angle 1350 may vary between repeat units 510A.

  In other embodiments, as shown in FIG. 4B, a receiving component 400B made in accordance with the present invention may include a first bond line 410B and a second bond line 412B. Similarly, the first bond line 410B and the second bond line 412B may include a plurality of repeating units 510B having extensions 520. The extension 520 of the repeat unit 510B may be configured similar to the extension 520 of the repeat unit 510A. Further, as shown in FIG. 4B, the bond line of the present invention is not limited to a linear repeat unit 510A. For example, as shown, in some embodiments, the bond line may include a plurality of repeating units 510B consisting of curved segments. As shown in the figure, the repetition unit 510B actually appears in a sine wave shape. Examples of other repeat units are shown in FIGS. 5A-5E.

  The extension 520 of FIGS. 4A and 4B may be straight as shown in some embodiments. However, the extension may have any suitable shape. For example, in some embodiments, the extension 520 can be a rectangle, circle, triangle, rhombus-like structure, trapezoid-like structure, any suitable polygonal shape, curve, angled line, twisted line, combinations thereof Etc. may be included. In other embodiments, the extension 520 may include an aesthetic design, such as a graphic or children's drawing. The graphic may be any suitable visual image (s). The graphics may be pictograms and / or images, such as but not limited to photographs, drawing, embossing, or any other material used to create pictograms and / or images. . Pictograms and / or images may be used for children's images, anthropomorphic images of animals or objects, cartoon images including famous cartoon characters, images of famous brand logos, and / or implementation of commerce. It may include image characters, arrows, marks, or symbols that are created in particular in association with each other, such as but not limited to movements and movements, and combinations thereof. Graphics and children's graphics are described in US Patent Publication No. 2005 / 0129743A1, US Patent Publication No. 2005 / 0125923A1, and US Patent Publication No. 2005 / 0125877A1.

  In some embodiments, it has been found that a sweep region that includes a portion of more than one bond line may have a higher bond area than a sweep region that includes a portion of a single bond line. The adhesion area of the sweep region including more than one part of the adhesion line can be reduced by any suitable method. For example, as shown in FIG. 4D, the first bond line 110 and / or the second bond line 112 may include a plurality of bond sites 460 that are close to a straight line in some embodiments. The plurality of bond sites 460 may be disposed within the overlap 320 of the first bond line 110 and the second bond line 112. In some embodiments, the plurality of adhesion sites 460 in the overlap 320 can define fewer bond areas than successive bond lines in the overlap, thereby reducing the amount of bond areas in the overlap 320. The plurality of adhesive sites 460 can have any shape known in the art.

  As shown in FIG. 5A, a receiving component made in accordance with the present invention may comprise an adhesive line including a plurality of repeating units 510A. The repeat unit 510A may include an open geometric shape consisting of straight lines forming the first leg 517 and the second leg 519 of the repeat unit 510A in some embodiments. As shown in FIG. 5B, in some embodiments, the repeat unit 510A may include a rounded edge 529 that connects the first foot 517 and the second foot 519 of the repeat unit 510A. A rounded edge 529 may likewise be placed between adjacent repeating units. As shown in FIG. 5C, the repeat unit 510A may include a flat edge 530 that connects the first foot 517 of the repeat unit 510A to the second foot 519. The flat edge 530 may similarly be disposed between adjacent repeat units.

  As shown in FIG. 5D, in some embodiments, the repeat unit 510A may include a plurality of wavy edges 512 and 514 that define boundaries for the first foot 517 and the second foot 519. In embodiments where the bond line includes a plurality of repeat units having wavy edges, the bond line thickness can be determined by measuring the thickness of the repeat unit 510A at at least 10 locations and taking their average thickness. . Further, as shown in FIG. 5E, in some embodiments, the repeat unit 510B may include a plurality of sinusoidal edges 516 and 518.

  The repeat units 510A and 510B of the present invention may include any suitable shape and combination of shapes. In some embodiments, the bond line of the present invention may include different repeating units within the bond line. In other embodiments, the repeat unit in the first bond line is similar while the second bond line includes a repeat unit that is different from the repeat unit of the first bond line.

  As previously mentioned, the orientation of the bond line during the manufacturing process can also affect the ratio of larger and smaller bond areas. In a receiving component made in accordance with the present invention, the longitudinal axis of the receiving component is generally parallel to the machine direction during the manufacturing process. In some embodiments, the resulting bond line is from the first longitudinal edge 170 (shown in FIGS. 1B and 3) to the second longitudinal edge 172 (shown in FIGS. 1B and 3). Can be extended).

  In contrast, as shown in FIG. 6, in some embodiments, a receiving component 1000 made in accordance with the present invention includes a first bond line 1010, a second bond line 1012, and a third bond line 1014. May include. In some embodiments, each of the first bond line 1010, the second bond line 1012, and the third bond line 1014 is directed toward the first direction 1224 that is generally parallel to the longitudinal axis 1060 of the receiving component 1000. The first end edge 1151 can extend to the second end edge 1152. The receiving component 1000 may include an adhesive zone 1030 that surrounds the adhesive line closest to the first longitudinal edge 1170 and the adhesive line closest to the second longitudinal edge 1172 and any adhesive lines in between. For example, as shown, the bond zone 1030 can surround the first bond line 1010, the second bond line 1012, and the third bond line 1014. Embodiments are contemplated where the receiving component includes more than three bond lines and fewer than three bond lines.

  The adhesive zone 1030 includes a plurality of sweep regions 1040, 1042, 1044, 1046, 1048, 1050 and 1052. The plurality of sweep regions 1040, 1042, 1044, 1046, 1048, 1050, and 1052 may have similar lengths and widths as previously discussed sweep regions. As shown, in some embodiments, each sweep region of the plurality of sweep regions 1040, 1042, 1044, 1046, 1048, 1050, and 1052 is a portion of the first bond line 1010, the second bond line. Part of 1012 and part of third bonding line 1014 may be included.

  Similar to the bond line pattern shown in FIG. 1B, in the bond line pattern of FIG. 6, each sweep region has a finite amount of bond area. The first bond line 1010 can overlap with the second bond line, and the second bond line 1012 can overlap with the third bond line 1014. However, in contrast to the overlap 320 (shown in FIG. 3) of the receiving component 100 (shown in FIGS. 1 and 3), the overlap 1020 of the receiving component 1000 is generally parallel to the horizontal axis 1062. Can be. Similarly, the second bond line 1012 can overlap the third bond line 1014.

  Overlap 1020 can be the distance between third reference line 1565 and fourth reference line 1575. In some embodiments, the overlap 1020 can be substantially parallel to the second direction 1225. Third reference line 1565 may be substantially parallel to longitudinal axis 1060 in some embodiments. Similarly, the fourth reference line 1575 can be substantially parallel to the longitudinal axis 1060 in some embodiments. The third reference line 1565 can extend from the first end edge 1151 toward the second end edge 1152, and can intersect the innermost point of the first bonding line 1010. The innermost points of the first bond line 1010 are those points closest to the second bond line 1012. The fourth reference line 1575 can extend from the first end edge 1151 toward the second end edge 1152, and can intersect the outermost point of the second bonding line 1012. The outermost points of the second bond line 1012 are those points on the second bond line closest to the first bond line 1010 when referring to the overlap 1020 of the first bond line 1010 and the second bond line 1012. .

  The receiving component of the present invention can be made in many different ways. For example, in some embodiments, the receiving component may include a web from a fibrous material such as a woven web, a nonwoven web, or any combination thereof. In some embodiments, the process described in connection with FIGS. 2A and 2B can be utilized to form a fiber-to-fiber bond between the open fibers of the nonwoven and create a nonwoven web. In other embodiments, the process can be utilized to provide supplemental adhesion to an already lightly bonded nonwoven web. Further, in some embodiments, supplemental bonding can bond the nonwoven web to the support structure. For example, the nonwoven web can have an initial bonded area that is between about 10% and about 20%, and can subsequently be bonded to the support layer using the bonding pattern of the present invention. The resulting receiving component can have a bonded area that is larger than the initial bonded area.

  The support layer may comprise any suitable support layer known in the art. For example, the support layer can comprise a film or a nonwoven web. Embodiments are contemplated in which the receiving component is bonded to the disposable absorbent article using the adhesive pattern of the present invention. For example, the receiving component can be coupled to a disposable diaper backsheet.

  One advantage of using the adhesive pattern of the present invention to bond the receiving component to the underlying support layer is that in some embodiments, no adhesive is required. For example, in one embodiment, when using a calendaring device as described in connection with FIGS. 2A and 2B, the adhesive pattern of the present invention is used to bond the receiving component and the support layer without adhesive. be able to.

  In certain embodiments, the initial bonded area of the receiving component may not be measurable. In particular, in embodiments where the receiving component includes a nonwoven web having hydroentangled fibers or needle punched fibers, the initial bonded area may not be ascertained. However, these nonwoven webs can still be utilized in the receiving component and bonded to the underlying support layer using the adhesive pattern of the present invention.

  As previously mentioned, the receiving component made in accordance with the present invention may comprise a nonwoven web. In some embodiments, the nonwoven web may include one fiber layer. In other embodiments, the nonwoven web may include more than one fiber layer. Any suitable nonwoven web can be used. For example, suitable nonwovens may include polypropylene, polyethylene, polyester, nylon, cellulose, polyamide or fibers made from a mixture of such materials. Fibers of one material or fibers of multiple materials or material combinations may be used for the first and / or second nonwovens. Exemplary nonwoven materials include spunbond, spunbond / meltblown / spunbond (SMS), spunbond / meltblown / meltblown / spunbond (SMMS), card, meltblown, and the like. Particularly acceptable nonwovens include high elongation card (HEC) nonwovens and deep activation polypropylene (DAPP) nonwovens. The nonwoven fabric may be made using any process known in the art.

  Nonwovens may include mechanically bonded fibers including needle punched or hydroentangled fibers. Other suitable bonding processes for making suitable nonwovens for use in the present invention are various types of chemical bonding such as spunbonding, thermal bonding, latex bonding, powder bonding, and the like.

  In certain embodiments, the basis weight of the nonwoven can be in the range of about 10 gsm to about 100 gsm, or any specific value within such range. In other embodiments, the basis weight of the nonwoven can be in the range of about 25 gsm to about 80 gsm. In still other embodiments, the basis weight of the nonwoven can be in the range of about 30 gsm to about 50 gsm.

  The fibers can be of any preferred size and shape. Some examples of preferred cross-sectional shapes include circles, ellipses (with or without lobe-like extensions), rectangles, triangles, diamonds, trapezoids, arbitrary polygons, and the like. Furthermore, the cross-sectional shape may comprise multiple lobes in some embodiments. For example, the cross-sectional shape may comprise three lobes or three leaves. Embodiments with more than three lobes and fewer than three lobes are also contemplated. In some embodiments, the fiber may be hollow. For example, the fiber may be a hollow crimped fiber.

  The fiber may be any preferred denier. For example, in some embodiments, the fiber may have a denier in the range of about 1 to about 10, or any individual numerical value within that range. In some embodiments, the fiber denier may range from about 1 to about 8. In other embodiments, the fiber denier may range from about 1 to about 5. Further, in some embodiments, the nonwoven fabrics of the present invention may include fibers made from polypropylene, polyethylene, polyolefin, bicomponent fibers, or any combination thereof.

  Further, crimped conjugate fibers (hereinafter simply referred to as conjugate fibers or nonwoven laminates using the same) can be used in accordance with the present invention. The crimped composite fiber may include a first propylene type polymer and a second propylene type polymer. The first and second propylene type polymers may be arranged to occupy substantially separate areas in the cross section of the composite fiber and may extend continuously in the length direction. In some embodiments, each of the first and second propylene type polymers forms a portion on the peripheral surface at least along the length of the composite fiber. In some embodiments, as shown in FIG. 9A, the bicomponent fiber 1500 comprises a first propylene type polymer 1502 and a second propylene type polymer 1510, and each of the first and second propylene type polymers 1502 and 1510 is conjugated. It may be a side-by-side type composite fiber that extends side-by-side in the length direction of the composite fiber so as to form about 50% of 1520 on the peripheral surface of the fiber 1500.

  The first propylene type polymer 1502 and the second propylene type polymer 1510 may be arranged in any suitable shape that causes crimping in the resulting fiber 1500. For example, in some embodiments, as shown in FIG. 9B, a second propylene type polymer 1510 that is asymmetrically distributed within the first propylene type polymer has a transverse pattern within the first propylene type polymer 1502. May be formed. In some embodiments, as shown in FIG. 9C, the second propylene-type polymer 1510 comprises the first propylene-type polymer 1502 such that the first propylene-type polymer 1502 comprises about 100% of the peripheral surface 1520 of the composite fiber 1500. It may be completely surrounded by the type polymer 1502. The second propylene type polymer 1510 may be disposed asymmetrically within the first propylene type polymer 1502 such that crimping results in the resulting fiber 1500. In some embodiments, the first propylene type polymer 1502 and the second propylene type polymer 1510 are in side-by-side orientation such that an opening 1530 is formed between the first propylene type polymer and the second propylene type polymer. It may be. This structure can be similar to a hollow fiber.

  Further, embodiments are contemplated in which the second propylene type polymer 1510 comprises any numerical value greater than about 50% of the perimeter surface 1520 of the composite fiber 1500. Further, embodiments are contemplated in which the second propylene type polymer 1510 comprises any numerical value that is less than about 50% of the perimeter surface 1520 of the composite fiber 1500. Also, the first propylene type polymer 1502 may be configured similar to the second propylene type polymer 1510, and vice versa. Embodiments can also be envisaged where the fibers are crimped to form a curled or helical structure.

  In some embodiments, the melting point of the first propylene type polymer 1502 as measured by a differential scanning calorimeter (DSC) may be at least 15 ° C. higher than the melting point of the second propylene type polymer 1510. In some embodiments, the melting point of the first propylene type polymer 1502 may be higher than the melting point of the second propylene type polymer 1510 by a range from about 15 ° C. to about 60 ° C. or any value within this range.

  Further, the weight ratio of the first propylene type polymer 1502 to the second propylene type polymer 1510 may in some embodiments range from about 50/50 to about 5/95 or at any ratio within the range. There may be. In some embodiments, the weight ratio may be in the range of about 40/60 to 10/90 or any ratio within the range. In some embodiments, the weight ratio may be in the range of about 30/70 to 10/90 or any ratio within the range.

  In some embodiments, a possible method of determining the weight ratio of the first propylene type polymer 1502 to the second propylene type polymer 1510 may be a temperature rising elution diversion (TREF). For example, weight ratio using cross fractionation chromatography T-150A manufactured by Mitsubishi Chemical Co., Ltd., IR spectrometer 1 ACVF manufactured by Miran, 3.42 micrometer 135 ° C., and TREF column 4 mm in inner diameter and 150 mm in length. Can be determined.

  Other steps may include utilizing an eluate of orthodichlorobenzene (ODCB) at a flow rate of 1.0 mL / min, a sample concentration of 30 mg / 10 mL-ODCB, and a sample volume of 500 microliters. Still other conditions may include cooling the sample from 135 ° C. to 0 ° C. in 135 minutes and then holding the sample at 0 ° C. for 60 minutes. The shunt increments are 0, 20, 40, 50, 60, 75, 80, 83, 86, 89, 92, 95, 98, 101, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 125, 130, and 135 ° C.

  The resulting elution curve is divided by a vertical line (perpendicular to the x-axis) at the valley between the two peaks. The vertical line creates the first and second parts of the elution curve. The first part includes an area under the curve to the right of the vertical line, and the second part includes an area under the curve to the left of the vertical line. The weight ratio of the first propylene type polymer to the second propylene type polymer can be calculated by the ratio of the first portion to the second portion.

  In some embodiments, melts of first and second propylene type polymers (second propylene type polymer / first propylene type polymer) measured according to ASTM standard D1238 (MFR: measurement temperature 230 ° C., load 2.16 kg). The flow rate may be in the range of about 0.8 to about 1.2, or any individual number within this range. In some embodiments, the melt-flow rate can range from about 0.9 to about 1.1.

  In some embodiments, the area ratio of the first propylene type polymer to the second propylene type polymer in the cross-section of the composite fiber can be approximately the same as the weight ratio. For example, in some embodiments, the ratio of the cross-sectional area of the first propylene type polymer to the cross-sectional area of the second propylene type polymer can be in the range of about 50/50 to about 5/95, or Any numerical value within this range may be used. In some embodiments, the ratio can be in the range of about 40/60 to 10/90, or any ratio within the range. In some embodiments, the ratio can be in the range of about 30/70 to 10/90 or any ratio within the range.

  When the above conditions are met, a crimped state can be realized in the composite fiber. A suitable number of crimps may be in the range of about 5 crimps to about 50 crimps / 25 mm according to JIS standard L1015, or any individual number within this range.

  In the present invention, DSC melting point measurements of the first and second propylene type polymers were made with a Perkin Elmer apparatus. When the sample is set on the measuring plate, the temperature is increased from 30 ° C. to 200 ° C. at a heating rate of 10 ° C./min, 200 ° C. is maintained for 10 minutes, and then the temperature is 30 ° C. at a cooling rate of 10 ° C./min. After that, the temperature is raised again from 30 ° C. to 200 ° C. at a rate of 10 ° C./min, and the measurement is performed during the second run.

  Further, when two or more melting point peaks are present in the composite fiber based on DSC, it is desirable that the area of the lowest melting point peak is greater than the area of the higher melting point peak. The melting point of the composite fiber based on DSC is measured by setting the sample on the measurement plate and increasing the temperature from 30 ° C. to 200 ° C. at a heating rate of 10 ° C./min. Made during the run. In the measurement method described above, the melting point is obtained as a peak on the endothermic curve, and the area of the melting point peak is obtained together with the melting point value. When the melting point peaks of two composite fibers obtained by the first run measurement method overlap, the other peaks are estimated according to the shape of the peak having the maximum intensity, and the area is obtained. A comparison is made with the peak area.

  Regarding the first and second propylene type polymers constituting the composite fiber of the present invention, propylene homopolymer and propylene copolymer, and ethylene, 1-butene, 1-pentene, 1-hexene, 1-octene and 4-methyl-1 One or more different types of α-olefins having 2-20 carbon atoms, such as pentene, preferably 2-8 carbon atoms, and having propylene as the main structural unit, Can be utilized in embodiments. Among those listed above, a propylene homopolymer or a propylene-ethylene random copolymer having an ethylene unit content in the range of about 0 to about 10 mol% and having an MFR of about 20 to about 200 g / 10 min. preferable.

In some embodiments, the first propylene is from the viewpoint of producing a non-woven fabric having excellent fastening strength and mechanical strength in addition to high bulkiness and flexibility suitable for use as a female member of a fastening device. The type polymer may be a propylene homopolymer and the second propylene type polymer is a random copolymer of propylene and a small amount of ethylene having a uniform ethylene component content of about 10 mole percent or less, preferably from about 2 to about 10 mole percent. It may be. In this case, the amount of ethylene unit component is obtained according to standard methods using ¹³ C-NMR spectral analysis.

  In some embodiments, the melting point of the first propylene-type polymer can be in the range of about 120 to about 175 ° C., or any numerical value within this range. In some embodiments, the melting point of the second propylene type polymer may be in the range of about 110 ° C to about 155 ° C. The aforementioned propylene type polymer can be produced using a highly stereoregular polymerization catalyst.

  As long as the object of the present invention is not lost, a suitable amount of other components may be included in the above-mentioned composite fiber in addition to the propylene type polymer. Other suitable components include heat stabilizers, weathering agents, various stabilizers, antistatic agents, slip agents, anti-blocking agents, antifoggants, lubricants, dyes, pigments, natural oils, synthetic oils, waxes And so on. Some suitable examples of stabilizers include antioxidants such as 2,6-di-t-butyl-4-methylphenol (BHT), tetrakis [methylene-3- (3,5-di-t- Butyl-4-hydroxyphenyl) propionate] methane, β- (3,5-di-t-butyl-4-hydroxyphenyl) alkyl ester propionate, and 2,2′-oxamide bis [ethyl-3- (3 Phenolic antioxidants such as 5-di-tert-butyl-4-hydroxyphenyl) propionate], fatty acid metal salts such as zinc stearate, calcium stearate and calcium 1,2-hydroxystearate, glycidyl monostearate, Glycidyl distearate, pentaerythritol monostearate, pentaerythritol distearate and Polyhydric alcohol fatty acid esters such as pentaerythritol tristearate, and the like. In addition, one or more different types of ingredients may be combined, mixed and used in a similar manner. Some examples of suitable lubricants include oleic acid amide, erucic acid amide, stearic acid amide, and the like.

  Further, in some embodiments, the composite fiber further comprises silica, diatomaceous earth, alumina, titanium oxide, magnesium oxide, pumice powder, pumice balloon, aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, dolomite, calcium sulfate, Fillers such as potassium titanate, barium sulfate, calcium sulfite, talc, clay, mica, asbestos, calcium silicate, montmorillonite, bentonite, graphite, aluminum powder, and molybdenum sulfide may be included.

  Mixing of the propylene type polymer with the optional ingredients described above can be accomplished by any suitable conventional method.

  The production of a spunbonded nonwoven fabric is, in some embodiments, a first propylene type polymer that forms one section of a composite fiber and a second propylene type polymer that forms another section melted by another extruder. Can be realized when done. The first propylene type polymer and the second propylene type polymer can be extruded from a nozzle plate having a composite spinning nozzle structure in such a way that each molten material forms a desired fiber structure while extruding composite long fibers. The extruded long fibers are cooled with cooling air. In some embodiments, tension is applied with blowing air to form a predetermined fiber size. The fibers are collected on a collecting belt for deposition to form a predetermined thickness, and for the bonding process, thermal melting is applied to the nonwoven using an embossing finish.

Where the nonwoven includes bicomponent fibers as described above, in some embodiments, the fiber size of the nonwoven is preferably from about 0.5 to about 5.0 denier, or any individual number within this range. is there. In some embodiments, the fiber size may range from about 1.0 to about 4.0 denier. The basis weight of the nonwoven may in some embodiments be in the range of about 0.2 Pa to about 0.8 Pa (about 20 to about 80 g / m ² ), or any individual number in this range. It's okay. In some embodiments, the basis weight may range from about 0.3 Pa to about 0.6 Pa (about 30 to about 60 g / m ² ).

  Fastening devices made in accordance with the present invention can be incorporated into a variety of consumer and commercial products that benefit from having a receiving component with an adhesive pattern made in accordance with the present invention. In any of the embodiments described herein, the receiving component may be a separate component that is added to the commercial product. For example, the receiving member can be any component (eg, topsheet, absorbent core, backsheet, fastening device, side panel, cuff, etc.) of an absorbent article or other commercial item (eg, wrap, medical product, etc.) ) May be a separate structure. Alternatively, the receiving component may be made as part or all of any commercial or fastener element. For example, the receiving component can be any component (eg, topsheet, absorbent core, backsheet, fastening device, side panel, cuffs) of an absorbent article or other commercial item (eg, wrap, medical product, etc.). Etc.). Further, the receiving component may be placed in any suitable location on or within the commercial item or fastener. For example, the receiving component may be disposed on the outer surface of the commercial item or fastener, the surface facing the wearer, or may be contained within. For purposes of explanation, the receiving component of the present invention will be discussed in the context of disposable diapers.

  As shown in FIGS. 7A and 7B, the disposable absorbent article 600 may include a liquid permeable topsheet 622 and a backsheet 624 coupled to at least a portion of the topsheet 622. The disposable absorbent article 600 further includes an absorbent core 646 disposed between the topsheet 622 and the backsheet 624. The disposable absorbent article 600 further includes a side panel 628, an external cuff 632, an internal cuff 652, and a waist structure 630.

  The peripheral portion of the disposable absorbent article 600 may be defined by longitudinal edges 675A and 675B, a first waist edge 650, and a second waist edge 651. The longitudinal edges 675A and 675B may run substantially parallel to the longitudinal centerline 690 of the disposable absorbent article 600. The first waist edge 650 and the second waist edge 651 may run substantially parallel to the lateral centerline 680 of the disposable absorbent article 600. The disposable absorbent article 600 may further include a stretchable leg structure 631 that may be disposed adjacent to the longitudinal edges 675A and 675B.

  The disposable absorbent article 600 may further include a first waist member 602 and a second waist member 604. The first waist member 602 and / or the second waist member 604 may be elastically extensible. As shown, in some embodiments, the first waist member 602 may be disposed adjacent to the first waist edge 650. In some embodiments, the second waist member 604 may be disposed adjacent to the second waist edge 651. In general, the first waist member 602 and / or the second waist member 604 may be stretched before bonding to the disposable absorbent article 600. Thus, by releasing at least a portion of the extension hung on the first waist member 602 and / or the second waist member 604, a portion of the disposable absorbent article 600 coupled thereto can be corrugated. This corrugation of the disposable absorbent article 600 allows the first waist member 602 and / or the second waist member 604 and the disposable absorbent article 600 to expand and contract around the waist of the wearer, thereby further comforting the wearer. And may provide improved fit. Examples of suitable waist members 602 and / or 604 include those described in US Pat. No. 4,515,595, US Pat. No. 5,151,092, and US Pat. No. 5,221,274. Including. Disposable diapers are typically made to have two elastic waist structures, one located in the first waist region and one located in the second waist region, but the diaper is a single elastic Can be created in the waist structure.

  The disposable absorbent article 600 may further include an outer cuff 632 and an inner cuff 652 to improve the containment of liquid and other body effluent. Each elasticized external cuff 632 may include several different embodiments for reducing leakage of effluent from the body into the legs. Outer cuff 632 and inner cuff 652 are further described in US Pat. No. 3,860,003, US Pat. No. 4,909,803, and US Pat. No. 4,695,278.

  As previously mentioned, the disposable absorbent article may further include a pair of side panels 628. As shown in FIG. 7B, the side panel 628 can extend outward from the first longitudinal edge 675A and the second longitudinal edge 675B of the disposable absorbent article 600. In some embodiments, the side panel 628 can be coupled to the disposable absorbent article 600 at the second waist region 638, and in some embodiments, the side panel 628 is disposable at the first waist region 636. The absorbent article 600 can be bonded. Alternatively, in some embodiments, the disposable absorbent article 600 may include a pair of side panels disposed in the second waist region 638 and a pair of side panels disposed in the first waist region 636. In some embodiments, the side panel 628 can form part of the leg opening when the disposable absorbent article 600 is fastened. Side panel 628 may form part of a leg opening disposed on the outer surface of the wearer's leg. The crotch region 610 of the disposable absorbent article 600, together with the first waist region 636 and the second waist region 638, may form part of a leg opening disposed on the inner surface of the wearer's leg. In some embodiments, the side panel 628 may be elastically extensible.

  The disposable absorbent article 600 further includes a fastening device 640 that couples at least a portion of the first waist region 636 and at least a portion of the second waist region 638, preferably to form a leg and waist opening. Including. The fastening device 640 also functions to maintain lateral tension with the waist members 602 and / or 604 to keep the disposable absorbent article 600 in position around the waist of the wearer. The fastening device 640 may include an engagement component 642 that can be disposed on the side panel 628 in some embodiments. The fastening device 640 may further include a receiving component 644 disposed in the first waist region 636 in some embodiments.

  As shown in FIG. 7C, in other embodiments, the fastening device 640 can comprise a plurality of fastening components on the side panel 628. For example, as shown, the side panel 628 may include an engagement component 642 that may include a plurality of engagement elements in some embodiments. Further, in some embodiments, the side panel 628 may further comprise a receiving component 1475 disposed on the opposite side of the engaging component 642. One advantage of this arrangement is that the receiving component 644 (shown in FIG. 7A) can be coupled to the first waist region 636 or to the receiving component 1475 of the other side panel 628. ) Can be engaged.

  As shown in FIG. 7A, receiving component 644 is disposed on disposable absorbent article 600 such that the overlap of bond lines 1375 is substantially perpendicular to the main direction of shear force 775. As shown in FIG. 7A, main direction shear force 775 is a force desired during use that generally occurs once disposable absorbent article 600 is in a clamped state. In some embodiments, the receiving component 644 may be disposed adjacent to the first waist edge 650 of the first waist region 636 on the outer surface of the disposable absorbent article 600. In other embodiments, the receiving component 644 may be disposed adjacent to the second waist edge 651 in the second waist region 638. In this embodiment, the engagement component 642 may be disposed adjacent to the first waist region 636. In some embodiments, the receiving component 644 may be disposed on the side panel 628 and the engaging component may be disposed in the first waist region 636. In some embodiments, the receiving component 644 may include a plurality of separate elements.

  Any suitable engagement component 642 can be used in the present invention. A preferred engagement component 642 comprises a hook fastening material. The hook fastening material can mechanically engage the fibrous element of the receiving component 644 to provide a positive closure. The hook fastening material according to the invention can be manufactured from a wide range of materials. Suitable materials include nylon, polyester, polypropylene, or any combination of these materials, or other materials known in the art.

  A suitable hook fastening material is Scotchmate ™ available from Minnesota Mining and Manufacturing Company of St. Paul, Minn. It includes a number of molded engagement elements that protrude from the backing, such as a commercially available material designated by brand number FJ3402. Alternatively, the engagement element may have any shape, such as a clasp, “T” shape, mushroom, or any other shape known in the art. An exemplary hook fastening material is described in US Pat. No. 4,846,815. Another suitable hook fastening material includes an array of protrusions formed of a thermoplastic material. Hot melt adhesive thermoplastics, particularly polyester and polyamide hot melt adhesives, are particularly well suited for forming protrusions of hook fastening materials. Protrusions, in some embodiments, cut the material in a manner that allows the thermoplastic material to be printed on the substrate in separate units in the molten state and allows a portion of the thermoplastic material to stretch prior to cutting. It can be manufactured using a modified gravure printing process by allowing the stretched molten material to “freeze” into protrusions. This hook fastening material and method and apparatus for making such a hook fastening material is more fully described in European Patent Application 03810887.

  The fastening device 640 may be a primary fastening device for joining the first and second waist regions 636 and 638. However, the fastening device 640 may be used alone or in conjunction with other fastening methods such as tab and slot fasteners, tape fasteners, snaps, buttons, etc., to provide different fastening characteristics. For example, the fastening device 640 may provide a disposable absorbent article 600 with a disposal method to fasten the disposable absorbent article 600 in a shape convenient for disposal. Further, the second fastening method can provide a disposable absorbent article 600 with a method of adjusting fit or can increase the bond strength between the first waist region 636 and the second waist region 638.

  The fastening device 640 can be pre-fastened in a packaged state so that the caregiver or wearer can wear the disposable absorbent article 600 when removed from the package. Alternatively, the fastening device 640 may be unfastened in the packaged state so that the caregiver or wearer fastens the fastening device 640 while wearing the disposable absorbent article 600. In yet another embodiment, the packaging may include both pre-fastened and non-fastened disposable absorbent articles 600 for caregiver or wearer convenience.

  As shown in FIG. 8A, a disposable absorbent article 700 with a fastening device 740 is shown. The fastening device 740 includes a first engagement component 760A disposed on the first side panel 728A and a second engagement component 760B disposed on the second side panel 728B. The first engaging component 760A and the second engaging component 760B can engage the receiving component 644 when fastened.

  Receiving component 644 may include a plurality of bond lines 718 made in accordance with the present invention. Each of the plurality of bond lines 718 may include a crest portion and a trough portion. As previously mentioned, the receiving component 644 can be disposed on the disposable absorbent article 700 such that the overlap between the bond lines is approximately perpendicular to the main direction of the shear force 775. Thus, the receiving component of the present invention, which is made similar to receiving component 100 (shown in FIGS. 1B and 3), has a receiving component horizontal axis 162 (shown in FIGS. 1B and 3). May be disposed on the disposable absorbent article 700 such that is substantially parallel to the main direction of the shear force 775. Alternatively, the receiving component of the present invention made similar to receiving component 1000 (shown in FIG. 6) may have a longitudinal axis 1060 of the receiving component that is substantially parallel to the main direction of shear force 775. In addition, it may be disposed on the disposable absorbent article 700.

  The main direction of shear force 775 is defined by the force in use. In particular, the first side panel 728A and the second side panel 728B exert a force on the receiving component 644 when the disposable absorbent article 700 is in a clamped state. The force can be caused in part by the elastomeric material of the side panels if they are elastically stretchable. Further, the shear force can be caused by a user or caregiver during use of the disposable absorbent article 700.

  As shown in FIG. 8B, a disposable absorbent article 702 with a fastening device 740 is shown. Similar to the disposable absorbent article above, the first engaging component 760A and the second engaging component 760B can engage the receiving component 644 when fastened. The receiving component 644 may include a plurality of first bond lines 722 and a plurality of second bond lines 720. A part of each of the plurality of first bonding lines 722 overlaps each adjacent bonding line. Similarly, a part of each of the plurality of second adhesive lines 720 overlaps a part of each adjacent adhesive line.

  The plurality of first bond lines 722 may be bent at an angle so as to provide the wearer with a visual signal of where to fasten the first engagement component 760A. Further, the plurality of second bond lines 720 may be bent at an angle so as to provide a visual signal to the wearer where to fasten the second engagement component 760B.

  In some embodiments, the fastening angle 1250 may be in the range of about 0 degrees to about 45 degrees, or may be any individual number in this range. In other embodiments, the fastening angle 1250 may be between about 10 degrees and about 25 degrees. In still other embodiments, the fastening angle 1250 may be between about 15 degrees and about 20 degrees.

  The fastening angle 1250 of the plurality of first bonding lines 722 can be determined by performing linear approximation on each bonding line in the bonding pattern of the plurality of first bonding lines 722. A bond line is considered to be part of a plurality of first bond lines 722 if a portion of that bond line overlaps any portion of another bond line within the plurality of first bond lines 722. Can do. A linear approximation for each bond line within the plurality of first bond lines 722 may be averaged to determine a first orientation line 1253 for the plurality of first bond lines 722. The intersection between the first orientation line 1253 and the longitudinal axis 770 of the disposable absorbent article 702 defines a fastening angle 1250. The same analysis can be performed for multiple second bond lines 720.

  The disposable absorbent article may include many components, elements, members, etc., and can be made in a variety of ways. For example, the topsheet 622 (shown in FIG. 6) and the backsheet 624 (shown in FIG. 6) generally have a length greater than the dimensions of the absorbent core 626 (shown in FIG. 6) and It may have a width dimension. A topsheet 622 (shown in FIG. 6) and a backsheet 624 (shown in FIG. 6) can extend beyond the edges of the absorbent core 626 (shown in FIG. 6). , Thereby forming the periphery of the disposable absorbent article 600 (shown in FIG. 6). The topsheet 622 (shown in FIG. 6), the backsheet 624 (shown in FIG. 6), and the absorbent core 626 (shown in FIG. 6) may include many different materials, A variety of well-known shapes may be assembled, and typical diaper materials and shapes are generally described in U.S. Pat. No. 3,860,003, U.S. Pat. No. 5,151,092, and U.S. Pat. 221,274.

  Any topsheet known in the art that is compatible with the present invention may be used in the present invention. Suitable materials for the topsheet include porous foams, reticulated foams, perforated plastic films, or natural fiber woven or non-woven materials (eg wood or cotton fibers), synthetic fibers (eg polyester or polypropylene fibers) ), Or a combination of natural and synthetic fibers. By way of example, materials suitable for use in the topsheet are P-P by Veratec, Inc., a division of International Paper Company in Walpole, Mass. A web of staple length polypropylene fibers produced with the notation of 8.

  Some examples of suitable topsheets are further described in US Pat. No. 3,929,135, US Pat. No. 4,324,246, US Pat. No. 4,342,314, US Pat. No. 045, US Pat. No. 5,006,394, US Pat. No. 4,609,518, US Pat. No. 4,629,643. Any portion of the topsheet may be coated with a lotion known in the art. Examples of suitable lotions are US Pat. No. 5,607,760, US Pat. No. 5,609,587, US Pat. No. 5,635,191, US Pat. No. 5,643,588, US Pat. 5,968,025, US Pat. No. 6,714,441 and PCT International Publication No. WO 95/24173.

  Further, the topsheet may be fully or partially elastically extensible or shortened to provide space for the topsheet and the absorbent core. Representative structures including elasticized or shortened topsheets are disclosed in US Pat. No. 4,892,536, US Pat. No. 4,990,147, US Pat. No. 5,037,416, and US Pat. No. 5,269,775.

  A suitable backsheet for use in the disposable absorbent article of the present invention may comprise a laminated structure. For example, as discussed above, the backsheet may include a first backsheet layer and a second backsheet layer (see items 241 and 242 in FIG. 2C). The second backsheet layer is impermeable to liquid (eg, urine) and has a thickness of, for example, from about 0.012 mm (0.5 mil) to about 0.051 mm (2.0 mils). It may include a thin plastic film such as a thermoplastic film having. Suitable backsheet films include those manufactured by Tredegar Corporation, based in Richmond, VA, and sold under the trade name CPC2 film. The first backsheet layer and / or the second backsheet layer may include a breathable material that allows vapor to escape from the pull-on garment while still preventing emissions from passing through the backsheet. Suitable breathable materials include composite materials such as woven webs, nonwoven webs, film-coated nonwoven webs, those manufactured by Mitsui Toatsu Co. (Japan) under the designation ESPOIR NO, and Toledegar Microporous films such as those manufactured by (Tredegar) (Richmond, VA) and sold under the EXAIRE designation, as well as Clopay Corporation (Cincinnati, Ohio) May include materials such as monolithic films such as those manufactured under the name HYTREL blend P18-3097. Several breathable composite materials are more fully described in PCT patent application WO 95/16746, US Pat. No. 5,938,648, US Pat. No. 5,865,823, and US Pat. No. 5,571,096. Have been described.

  The backsheet or any portion thereof may be elastically extensible in one or more directions. In one embodiment, the backsheet may comprise a structural elastic-like film (“SELF”) web. A structural elastic-like film web is an extensible material that exhibits an elastic-like behavior in the direction of elongation without the use of additional elastic materials and is described in more detail in US Pat. No. 5,518,801. In alternative embodiments, the backsheet may comprise an elastic film, foam, strand, or a combination of these or other suitable materials with a nonwoven or synthetic film.

  Absorbent cores suitable for use in the present invention are generally compressible, conformable, non-irritating to the wearer's skin, and absorb and retain liquids such as urine and other specific body exudates Any absorbent material that may be included may be included. In addition, the configuration and structure of the absorbent core may also vary (eg, the absorbent core (s) or other absorbent structure (s) may change caliper zones, hydrophilic May have sex gradient (s), superabsorbent gradient (s), or lower average density and lower average basis weight acquisition area, or include one or more layers or structures It may be) Suitable exemplary absorbent structures for use as the absorbent core are US Pat. No. 4,610,678, US Pat. No. 4,673,402, US Pat. No. 4,834,735, US Patent No. 4,888,231, US Pat. No. 5,137,537, US Pat. No. 5,147,345, US Pat. No. 5,342,338, US Pat. No. 5,260,345, US No. 5,387,207 and US Pat. No. 5,625,222.

  The backsheet may be coupled to the topsheet, absorbent core, or any other element of the disposable absorbent article by any attachment means known in the art. For example, the attachment means can include a uniform continuous layer of adhesive, a patterned layer of adhesive, or an array of discrete lines, helices, or dots of adhesive. Some suitable attachment means are disclosed in US Pat. No. 4,573,986, US Pat. No. 3,911,173, US Pat. No. 4,785,996, and US Pat. No. 4,842,666. It is disclosed. Examples of suitable adhesives are described in H.C. B. Manufactured by Fuller Company and marketed as HL-1620 and HL1358-XZP. Alternatively, the attachment means can include thermal bonding, pressure bonding, ultrasonic bonding, dynamic mechanical bonding, or any other suitable attachment means known in the art, or a combination of these attachment means.

  Various sublayers may be disposed between the topsheet and the backsheet. The sublayer may be any material or structure capable of receiving, storing or immobilizing excreta. Thus, the sublayer may include a single material or multiple materials operatively associated with each other. Further, the sub-layer may be integral with another element of the pull-on disposable absorbent article, or one or more coupled directly or indirectly to one or more elements of the disposable absorbent article. It may be a separate element. Further, the sublayer may include a structure that is separate from the absorbent core, or may include or be part of at least a portion of the absorbent core.

  Typical materials suitable for use as the sublayer include large open-cell foams, macroporous, compression-resistant non-woven bulky products, open-cell foams and closed-cell foams (large size particulate moldings). forms) (macroporous and / or microporous), bulky nonwovens, polyolefins, polystyrene, polyurethane foams or particles, structures comprising a number of vertically oriented looped fiber strands, punched holes or depressions as described above And the like, and the like. (As used herein, the term “microporous” refers to a material that can transfer fluid by capillary action. The term “macroporous” refers to a material that is too large to allow capillary transfer of fluid. And generally has holes larger than about 0.5 mm in diameter, and more precisely, holes larger than about 1.0 mm in diameter.) One embodiment of the sublayer is 3M Company as XPL-7124 Includes a mechanically fastened loop landing element having an uncompressed thickness of about 1.5 mm, available from 3M Corporation (Minneapolis, Minnesota). Another embodiment includes a crimped, resin bonded 6 denier nonwoven bulk with a basis weight of 110 g per square meter and an uncompressed thickness of 7.9 mm, which is a Glit Company ) (Wrens, Georgia). Other suitable absorbent and non-absorbent sublayers are described in US Pat. No. 6,680,422 and US Pat. No. 5,941,864. Further, the sublayer or any portion thereof may include or be coated with a lotion or other known material to add, enhance, or modify the performance or other properties of the element.

  Embodiments of the present invention also include pockets for receiving and enclosing excrement, spacers providing voids for excrement, barriers for restricting excrement movement within the article, pull-on disposable absorbent articles It may include compartments or voids that receive and enclose excreted material deposited therein, or any combination thereof. Examples of pockets and spacers used in absorbent products are US Pat. No. 5,514,121, US Pat. No. 5,171,236, US Pat. No. 5,397,318, US Pat. No. 5,540. 671, US Pat. No. 6,168,584, US Pat. No. 5,306,266, and US Pat. No. 5,997,520. Examples of compartments or voids in absorbent articles are U.S. Pat. No. 4,968,312, U.S. Pat. No. 4,990,147, U.S. Pat. No. 5,062,840, and U.S. Pat. No. 755. Examples of suitable transverse barriers are described in US Pat. No. 5,554,142, PCT Patent WO 94/14395, and US Pat. No. 5,653,703. Examples of other structures suitable for handling low viscosity feces are disclosed in US Pat. No. 5,941,864, US Pat. No. 5,977,430, and US Pat. No. 6,013,063. Yes.

  Embodiments of the present invention may include an acquisition / distribution layer that can be configured to distribute moisture from a humidifying event to a moisture responsive member within a disposable absorbent article. Examples of suitable acquisition / distribution layers are described in US Pat. No. 5,460,622, US Patent Application Publication No. 2005/0027267, and US Patent Application Publication No. 2005/009173.

  Embodiments of the present invention may include a dusting layer well known in the art. An example of a suitable dusting layer is described in US Pat. No. 4,888,231.

Test method:
Determination of the adhesive area of the receiving component,
Sample preparation Sufficient representative absorbent articles are selected from the retail packaging of absorbent articles to perform all necessary tests. The receiving component of each absorbent article is removed from the article. Suitable methods include cutting the receiving component from the article.

  2. Each sample is equilibrated in a conditioned environment. The environmental parameters are 22 ° C. ± 2 ° C., 50% relative humidity ± 10% relative humidity. Samples are placed in these conditions for at least 24 hours prior to testing.

  3. Fix the sample on a flat surface. The sample is fixed to a flat surface so that the sample is placed on a completely flat surface. The sample is secured to a flat surface using a tape such as Scotch Removable Magic Tape ™ manufactured by 3M ™.

  4). The adhesion zone is identified according to the description of the adhesion zone described herein.

  5). The sweep region within the adhesion zone is identified according to the description of the sweep region described herein. Each of the sweep areas has a length equal to the contact area between the calendar rolls. Each of the sweep areas has a width equal to the width of the web on which the receiving component is created. Where the contact area between the calender rolls is not obtained, the length of the adhesive zone is divided by 0.25 and rounded up to the nearest whole number. The quotient is the number of sweep regions in the adhesion zone. The sweep areas have equal length.

6). The bonded area in each sweep region is measured and the bonded area of the sweep region is denoted as Bi, where i = 1 to n and n is the total number of sweep regions. Bonded area is measured in 0.01 mm ² to the nearest.

7). The total area in each sweep region is measured, and the total sweep region area is expressed as Si, where i = 1 to n and n is the total number of sweep regions. The total area is rounded and measured to the nearest 0.01 mm ² .

8). The following items are calculated from the collected data.
a) Adhesion ratio,
i) Identify the sweep region with the smallest adhesion area and denote it as Bi, min.
ii) identify the sweep region with the largest adhesion area, denoted as Bi, max;
iii) Calculate the adhesion ratio = Bi, max / Bi, min,
b)% adhesion area of each sweep region,
i) Percent bonded area for each sweep region = 100 × Bi / Si,
c) Total% bonded area,
i) Calculate the cumulative adhesion area, sum Bt = Bi, and i = 1 to n.
ii) Calculate the total area of accumulation, and make St = Si sum, i = 1-n.
iii) Total percent bonded area = 100 × Bt / St

  As previously mentioned, the area may be measured using a linear ruler and a geometric / trigonometric relationship. Alternatively, computerized image analysis may be used for more complex bond line patterns.

Measurement of the number of crimps of the fiber The number of crimps was measured by the procedure described below. Except for the procedure shown below, it should be remembered that the measurements were made according to JIS standard L1015.

  Initially, lines with a spatial separation of 25 mm were formed on a piece of glossy paper with a smooth surface. The two ends of each fiber are carefully removed from the non-woven fabric prior to thermal compression with an embossing roll so that crimps are not lost, and the paper described above with 25 ± 5% looseness due to spatial separation. It was pasted on.

  Each of the above test pieces is attached to the crimp tester chuck, the paper is removed, and the distance between the chucks (space distance) (mm) is read while the initial load (0.18 mN x number of display tex) is applied. It was.

  The number of crimps at that time was counted, the number of crimps per distance of 25 mm was obtained, and the average value of 20 measurements was used. The number of crimps was obtained by counting the sum of peaks and valleys and dividing by two.

  All documents cited in “Best Mode for Carrying Out the Invention” of the present invention are incorporated herein by reference in the relevant part, and any citation of any document shall It should not be construed as an admission that it is prior art. To the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of a term in a document incorporated by reference, the meaning or definition given to that term in this document applies And

  While specific embodiments of the present invention have been described and described, it will be appreciated by those skilled in the art that various modifications can be made without departing from the spirit of the invention. Accordingly, it is intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

  The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as “40 mm” shall mean “about 40 mm”.

The front view which shows the fastening apparatus created according to this invention. FIG. 1B is a top view of the receiving component of the fastening device of FIG. 1A, the receiving component being made in accordance with the present invention. 1 is a schematic diagram illustrating a process for forming an adhesive pattern according to the present invention. The front view which shows the side surface of a pair of calendar roll of the process of FIG. 2A. FIG. 3 is a plan view showing a receiving component made in accordance with the present invention. FIG. 2 is a plan view of the receiving component of FIG. 1 highlighting additional features of the adhesive pattern. FIG. 6 is a plan view illustrating another embodiment of a receiving component having an adhesive pattern according to the present invention. FIG. 6 is a plan view illustrating another embodiment of a receiving component having an adhesive pattern according to the present invention. 4B is a close-up view showing a cross section of the fibrous material web of FIG. 4A. FIG. FIG. 2 is a close-up view showing a cross section of the receiving component of FIG. 1. FIG. 4 is a plan view showing repeat units of various embodiments for repeat units that can be included in an adhesive pattern made in accordance with the present invention. FIG. 4 is a plan view showing repeat units of various embodiments for repeat units that can be included in an adhesive pattern made in accordance with the present invention. FIG. 4 is a plan view showing repeat units of various embodiments for repeat units that can be included in an adhesive pattern made in accordance with the present invention. FIG. 4 is a plan view showing repeat units of various embodiments for repeat units that can be included in an adhesive pattern made in accordance with the present invention. FIG. 4 is a plan view showing repeat units of various embodiments for repeat units that can be included in an adhesive pattern made in accordance with the present invention. FIG. 6 is a plan view illustrating another embodiment of a receiving component made in accordance with the present invention. The perspective view which shows the disposable absorbent article made according to this invention. FIG. 7B is a top view of the absorbent article of FIG. 7A in a flattened, uncontracted state. The front view which shows another embodiment of the side panel of the disposable absorbent article of FIG. 7A. The front view which shows a part of disposable absorbent article of FIG. 6 which has the fastening apparatus in a fastening state. To make the arrangement visible, the portion of the disposable absorbent article of FIG. 7 having the fastening device in a clamped state with the receiving component of the fastening device disposed on the disposable absorbent article. FIG. Sectional drawing which shows bicomponent fiber. Sectional drawing which shows bicomponent fiber. Sectional drawing which shows bicomponent fiber.

Claims (10)

A mechanical fastening device (10) comprising:
An engagement component (12) comprising a plurality of engagement elements (14) and a receiving component (100) having a longitudinal axis and a transverse axis, the plurality of engagement elements being engageable; A receiving component (100), the receiving component further comprising:
a. ) A first bonding line (110) and a second bonding line (112) extending in the first direction (1222), wherein a part of the second bonding line (112) is a part of the first bonding line (110). The second bonding line is disposed adjacent to the first bonding line so as to overlap the portion, the overlapping is substantially parallel to the second direction (1223), and the first direction (1222) is the first direction A first bond line and a second bond line, substantially orthogonal to the two directions,
b. ) An adhesive zone (1030) surrounding the first adhesive line and the second adhesive line; and c. ) A plurality of consecutive sweep regions (1040, 1042, 1044, 1046, 1048, 1050, 1052) disposed within the adhesive zone, each sweep region having a length (175) and a width (111). The sweep regions (1040, 1042, 1044, 1044, 1044, 1044, 1044, 1044, 1044, 1044), wherein the sweep regions are equal in length and substantially parallel to the longitudinal axis (160), and the width of the sweep region is equal and substantially parallel to the horizontal axis (162). 1046, 1048, 1050, 1052),
At least one sweep region includes a portion of both the first bond line and the second bond line, and the remaining sweep region of the plurality of sweep regions is at least a portion of the first bond line or at least the second bond line. A mechanical fastening apparatus comprising a portion of a bond line, each sweep region including a bond area, and wherein the receiving component has a bond ratio between two sweep regions of 1 or more and 20 or less.   The receiving component according to claim 1, wherein each of the plurality of sweep regions has a length of 0.1 mm or more and 1.2 mm or less.   3. A receiving component according to any of claims 1 and 2, wherein the first direction is substantially parallel to the longitudinal axis of the receiving component.   Receiving component according to claims 1 and 2, wherein the first direction is substantially parallel to the horizontal axis of the receiving component.   The receiving component of claim 1, wherein the adhesion ratio is greater than or equal to 1.0 and less than 3. 3.   Each of the plurality of sweep regions has a leading edge and a trailing edge, the leading edge and the trailing edge are substantially parallel to the first direction, and the intersection of the bonding line with the trailing edge is Receiving component according to any of the preceding claims, forming an angle (350) of 45 degrees or more.   7. A receiving component according to claim 6, wherein the angle is greater than or equal to 65 degrees.   A receiving component according to any preceding claim, wherein the total bonded area is less than 30% and the bonded area in any sweep region is less than 50%.   8. A receiving component according to claim 1-7, wherein the total bonded area is between 20% and 30% and the bonded area in any sweep region is less than 40%.   A disposable absorbent article to be worn around a wearer's lower torso, wherein the disposable absorbent article (600, 700, 702) comprises a first waist region, a second waist region, the first and second waist regions. A crotch region, a first waist edge and a second waist edge, and a first longitudinal edge and a second longitudinal edge, wherein the disposable absorbent article further comprises a topsheet, the top A back sheet coupled to at least a part of the sheet, an absorbent core disposed between the top sheet and the back sheet, and the fastening device according to claim 1, wherein the engagement A component is disposed on a side panel that extends outward from the first longitudinal edge in the first waist region of the disposable absorbent article, and the receiving component is disposed on an outer surface of the disposable absorbent article. Be done Disposable absorbent article.