JP2005519675A - Manufacturing method of diaper pants - Google Patents

Abstract

The present invention is a) a step of continuously supplying a web (1) along a traveling path, wherein the web (1) has a longitudinal direction coinciding with the traveling path and a lateral direction perpendicular to the longitudinal direction. And having a longitudinally extending first and second edge (7,8) and b) a web (1) with a number of first and second pant blanks (25,26). Each blank has a front portion (27, 36) and a rear portion (28, 37), and the portions are sequentially arranged in the lateral direction of the web (1), In a method for manufacturing disposable pants (2), including blanks (25, 26) such that all individual second blanks (26) are rotated 180 ° relative to all individual first blanks (25). Are aligned in the longitudinal direction of the web (1) To a method of, wherein in the cutting is performed. The invention also relates to a pant or pant diaper manufactured according to the method.

Description

The present invention relates to a method for manufacturing disposable pants or pants diapers, the method comprising the step of continuously feeding a web along a running path, wherein the web is coincident with the running path and perpendicular to the running direction. It is defined by first and second edges having a transverse direction and extending in the longitudinal direction.
The invention also relates to a product manufactured by said method.

  It has long been known to produce diaper pants and disposable pant diapers in an automated process factory. The more disposable pants that are produced per unit time, the faster the production speed is, since the time required to obtain the desired number of finished disposable pants is reduced. The quality of manufactured pants is of course another highly important issue because of customer demand and because manufacturing quality directly reflects the product economy. By eliminating the need to discard defective disposable pants, manufacturers can save a lot of money. Another important factor is the desire to minimize waste, as manufacturers usually have to pay for waste management, i.e. to remove waste. Furthermore, the waste itself represents expenses in the form of material loss.

  In addition, there is a customer demand that disposable pants or disposable pants diapers should be as comfortable as possible. To increase comfort, customers desire disposable pants or disposable pant diapers that do not have a seam in the hip or crotch region that runs over the user's hips on the lumbar side.

  It is known in the art to produce disposable pants having a waist side seam displaced towards the front of the disposable pant to avoid a seam located over the user's hips during use. The disposable pants are cut from the web and a number of cut portions are cut from the web to form leg openings in the pants. The web is also cut in such a way as to form the posterior and anterior parts of the pants. The rear body part and the front body part are joined together to form a waist-enclosing part. In order to obtain a waist side seam displaced towards the front body part, after some of the width of the front body part has been cut and removed, the rear body part is attached to the front body part. Even if such manufacturing provides the disposable pants with a lumbar side seam that is displaced toward the anterior part, cutting the anterior part results in a manufacturing process that consumes significant amounts of waste and time.

  Alternative process methods have been proposed to overcome the problem of undesired seams and unsatisfactory amounts of waste. The most common way to reduce waste is to make disposable pants part by part, and then assemble the parts at the join points along the production line. One problem with such a method is that production speed is reduced, and the risk of misassembling parts is obvious. Furthermore, assembling the different parts results in a number of undesirable seams, for example in the user's crotch region.

  A number of solutions have been proposed to overcome the problem of assembling the parts. GB2257347 shows a method for manufacturing disposable pants, for example. The web is fed continuously in its longitudinal direction and divided into upper and lower parts along the longitudinal centerline, which are joined together along the longitudinal centerline. The upper part is intended to form the posterior body part of the pants and the lower part is intended to form the anterior part of the pants. The posterior body part consists essentially of a non-stretchable material and the anterior body part consists of a prestretched material. In the process, multiple cuts are cut from the web to form each of the leg openings in the pants. The cut section has the desired size and shape and is symmetrical with respect to a line running in the transverse direction of the web, centered over the top and bottom of each pant blank. The web is then folded in half along the longitudinal centerline. The folded web is then joined and cut to form individual pants. Pre-stretched front body part shrinks in such a way that the back body part stretches over the user's waist side during use of the pants, and the user has comfortable pants where the seam is not located directly on the waist side give.

  Even though the pants described in GB 2257347 are manufactured with minimal waste and have no seams on the waist side, there are still problems related to both the manufacturing process and the pants themselves. In order to remove the seam from the lumbar side, the front body part must be made from a pre-stretched material and the back body part must be made from a different material. Thus, the production line has a slow first step with pre-stretching of the material of the front body part and a second step of joining that material to another material of the back body part with a seam landing in the user's crotch region during use. Must be included. If these two steps can be eliminated, the manufacturing process will be much faster and more reliable, and the seam from the bond in the second step will not appear in the user's crotch area while using the pants right. The removal of such seams in the crotch area will of course make the pants comfortable for the user.

  Thus, there is still a need for improved manufacturing methods for disposable pants. All improvements give the manufacturer a better and cheaper product, especially by providing an efficient production line with a high product volume and with as little waste as possible and by producing disposable pants that are more comfortable for the user Should be aimed at.

  The above-mentioned requirements are met and the above-mentioned problems are corrected by a highly efficient method of manufacturing disposable pants according to the present invention with a high flexibility for minimal waste and product alternatives. Furthermore, a disposable pant or disposable pant diaper according to the present invention will have a waist side seam displaced towards the front part of the pant and no seam in the crotch region of the pant.

  A typical disposable pant or pant diaper is a liquid-impermeable lower sheet facing away from the user during use, and a liquid-permeable upper sheet facing the user during use, and one or more disposed therebetween Including absorbers. However, disposable pants may be intended for use with one or more absorbent inserts.

  The lower sheet can be any liquid impermeable material or liquid impermeable material, such as a treated nonwoven, or any plastic material, or a laminate of nonwovens.

  The top sheet may be any inherent liquid permeable material or material that has been treated to be liquid permeable, such as a nonwoven, woven or perforated plastic film.

  The absorber may be any liquid holding material, or a layer of liquid holding material, or a combination of liquid dispensing material and liquid holding material. The absorber is an absorbent polymer material that can absorb an amount of fluid corresponding to several times the dry weight of the superabsorbent, and may contain a superabsorbent that swells upon absorption into a fluid-containing gel.

  The present invention relates to a method of manufacturing a disposable pant resulting from a pant blank, the disposable pant comprising a front part, a rear part and a central part extending between the front part and the rear part. The disposable pants also include a side edge that defines the leg opening of the pant and thus defines the disposable pant in an area intended to surround the user's leg.

The pant blank includes a front part and a rear part and a central part extending between them, which corresponds to the front part, the rear part and the central part of the final disposable pants. The method of manufacturing disposable pants includes the following steps:
a) a step of continuously supplying a web along a traveling path, wherein the web has a longitudinal direction coinciding with the traveling path and a lateral direction perpendicular to the longitudinal direction and extending in the longitudinal direction; A step defined by the first and second edges;
b) cutting the web into a number of first and second pant blanks, each blank having a front portion and a rear portion, wherein the portions are arranged in order in the transverse direction of the web.
The cutting is carried out in such a way that the blanks are arranged in the longitudinal direction of the web so that all the individual second blanks are rotated 180 ° with respect to all the individual first blanks.

  Pant blanks constitute the starting material when forming disposable pants. The web may include a single layer of one material or multiple layers of the same or different material, and depending on the web characteristics, the pant blank forms different types of disposable pants. For example, the absorbent body may be placed on a web that gives the possibility of producing disposable absorbent pants or pant diapers.

  The pant blank along the web is a first distance defining the length of the first rear portion for each first blank along the first end edge, and the first front portion for each first blank along the second end edge. A second distance that defines the length of the second distance, and a third distance that defines the length of the second front portion for each second blank along the first end edge, and for each second blank along the second edge. It can be described as having a fourth distance that defines the length of the second rear portion.

  Preferably, in the method for manufacturing disposable pants according to the present invention, the value obtained by dividing the first distance by the second distance and the value obtained by dividing the fourth distance by the third distance are in the range of 1.8 to 5.7. It is characterized by that.

  When disposable pants are formed, a seam will inevitably appear in the area where the rear part is joined to the front part. In a conventionally known lateral production method for disposable pants, the length of the front part and the length of the rear part along the production line are the same, i.e. the pant blanks lie adjacent to each other and At seams on disposable pants located on the hips. As mentioned above while describing the prior art, it is a desirable feature to have a disposable pant with a seam displaced towards the front of the user. That is, when disposable pants are used, the seam is positioned in such a way that the seam is located somewhere on the user's belly.

  According to the present invention, due to the difference in length due to the above, the rear part of the disposable pants is wider than the front part, so the seam between the rear part and the front part will be displaced towards the front of the disposable pants during use. Let's go.

  According to an example of the present invention, multiple first cut portions of the web are cut from the web along the first partial cut line, and multiple second cut portions of the web are cut from the web along the second partial cut line. The The first and second cutting portions are arranged at a predetermined distance from each other in the longitudinal direction of the web and are preferably cut in such a way that they form the side edges of the final product, disposable pants.

  The cutting portions may be the same or different from each other depending on the desired characteristics of the disposable pants. Each partial cut line need not be a single cut line, but may be a number of connected cut lines. Such cut cutting lines may be straight or curved, and at least one such cutting line spans an imaginary vertical center line, for example, intersects the vertical center line and is perpendicular to the vertical center line. It may extend in a straight line at one or another suitable angle.

  Further, the web is cut along a first cutting line, each of which extends from the first end edge to the first point on the first partial cutting line. The web is also cut along a second cut line, each of which extends from the first end edge to the second point on the second partial cut line. The web is also cut along a third cut line, each of which extends from the second edge to the third point on the first partial cut line. The web is also cut along a fourth cut line, each of which extends from the second edge to the fourth point on the second partial cut line.

  The web need not be cut along the cutting line in any particular order, but the web may be cut in the first, second, third and fourth cutting lines simultaneously with all or part of the first and second partial cutting lines. It may be cut along all or any one. Accordingly, all or one of the first, second, third and fourth cutting lines may coincide with at least a part of the partial cutting line.

  The first, second, third, and fourth cut lines may be straight or curved, or may include both straight and curved areas. Further, the cutting line may be perpendicular to the edge of the web or may be at a different angle to the edge of the web.

  When the pant blanks are cut from the web, each pant blank is folded and the front part is recloseable or permanently attached to the front part in such a way that each rear part of the pant rank overlaps the overlapping part To the corresponding second rear part. The folded pant blank thereby forms a disposable pant.

  The expression “overlapping method” relates to when the outside of one sheet is placed against the inside of another sheet or vice versa. Thus, according to the present invention, the inside of the rear part is placed on the outside of the front part or vice versa.

  The overlapping part is defined by a predetermined distance from the first cutting line to the third cutting line and from the second cutting line to the fourth cutting line at the overlapping part. That is, the overlapping portion will be the portion of the pant blank that constitutes the distance between the first cut line and the third cut line when the rear portion is folded over the front portion.

  For the first pant blank, the first cutting line lies on the first front part and the second cutting line lies on the first front part. For the second pant blank, the third cutting line lies on the second front part and the fourth cutting line lies on the first front part.

  However, it is possible to produce a disposable pant according to the invention in which the front part overlaps the rear part. The front part may be reclosed or permanently attached to the rear part in an overlapping manner.

  If it is envisaged that the disposable pants are reclosable, the overlap may comprise hook and loop material or other suitable reclosable means. If the overlap is to be permanently attached, a seam may be applied to secure the overlap to each other. The seam can be the result of a sealing operation including welding, hot melt, ultrasonic, gluing, or other suitable method. It may be a combination of an openable seam, i.e. a seam that can be torn or broken and a reclosable part with a reclosable fastening means. The openable seam can help hold the pants together when the user is wearing the pants. Such a seam may be placed on the inside of the reclosable fastening means.

  The folding of the pant blank is preferably done on a roller comprising a folding mechanism, for example a gripping means of the pant blank corner and a dolly or holding tool in which the pant blank is folded.

As mentioned above, one other important feature of the present invention is that the overlap is displaced toward the front part because the first distance is greater than the second distance and the fourth distance is greater than the third distance; That is, any seam or reclosable portion is displaced toward the front portion of the disposable pants. The displacement of the overlapping part towards the front part increases the comfort of the user. This is because the front part is less likely to receive pressure from outside clothing, thereby making the user less uncomfortable. In addition, it becomes easier to handle a reclosable diaper when the overlapping part is placed in the front part. This is because children tend to lie down on their backs, and adults using disposable pants can more easily handle overlapping parts at the front than at the sides.
According to an example of the invention, the cutting part and the pant blank are advantageously cut in such a way as to achieve a similar / identical shape for each of the first and second pant blanks.

  The first and second cut portions may each have a shape described by, for example, two opposing semicircles and two parallel lines connecting these semicircles. However, each cutting portion may have an oval, rectangular, square, or other suitable shape for the leg opening, thereby providing the desired characteristics of the disposable pants having different shapes on the side edges of the disposable pants. give.

  Generally when manufacturing disposable absorbent pants or absorbent articles using the method according to the present invention, the absorbent body is placed along the web at a fifth predetermined distance between the absorbent bodies. Disposable absorbent pants as well as a number of different absorbent layers and a number of other layers, such as liquid distribution layers and layers that are particularly suitable for being placed against the user's skin, such as non-woven liquid permeable skin You may provide a gentle material.

  The absorbent need not be placed on the web prior to cutting, but may be placed in or on each of the pant blanks at any time during manufacture. For example, the absorbent body may be placed on the pant blank immediately before folding the pant blank.

  In another example of the invention, the absorbent body is in the form of a unit that can be applied on the side of the disposable pants facing the user during use. Such an absorbent unit may include a liquid impermeable layer, a liquid permeable layer, and one or more absorbent layers therebetween. The absorbent unit may comprise securing means on the side of the liquid-impermeable layer lying adjacent to the disposable pants to keep the absorbent unit in place in the disposable pants. The disposable unit may further include a securing means on the portion of the liquid permeable layer that lies adjacent to the user's skin during use to keep the absorbent unit in place relative to the user's body or only the securing means. May be included. The latter fixing means may include various types of skin care products such as ointments, lotions and the like. The absorbent unit may comprise any type of conventional liquid retaining means such as upright gathers, side barriers, leg elastics, humps, and superabsorbent materials.

  Depending on the characteristics of the absorbent unit, the absorbent pants, i.e. the web, may be made of any suitable material. For example, if the absorbent unit has a liquid impermeable layer and a liquid retention system, the web making up the pants may be made of a suitable breathable material, and if the absorbent unit does not have a liquid impermeable layer, The web may be made of any suitable liquid impermeable material.

  However, the absorbent unit may be placed on the web or between layers of the web during the manufacturing process.

  Another method for producing disposable pants with absorbent or other characteristics is that the web already contains all or some of the material corresponding to the desired characteristics of the final product when the web is fed in-process. Forming the web in a simple way. For example, the web may include a liquid impermeable layer, a liquid permeable layer, and an absorbent body therebetween.

  To obtain the desired shape of the disposable pants, elastic means may be applied on the web. It is known in the art to use elastic means when forming disposable pants, for example when forming leg elastics, liquid barriers, humps and waist elastics. One advantage with the present invention is that the formation of the pant blank corresponds to the shape of the final disposable pant, which provides the unique possibility of applying an elastic body to the web in any desired pattern. In a known method of manufacturing disposable pants, the disposable pants are assembled from at least two parts joined together at a central part. Such a configuration limits the way in which the elastic element can be placed along the leg opening or waist opening of the pant or pant diaper.

  The elastic body can be applied or arranged in a number of different patterns, for example in an anti-phase zigzag pattern or in an anti-phase sine. Anti-phase means that the two elastic means start from a starting point on the opposite side of the center line running in the longitudinal direction of the product web and run in a pattern that opposes along the web. The elastic body is applied to the web in such a way that the different elastic means intersect each other in a small loop in the central part or not at all, or in such a way that the elastic body runs from one side of the web to the other. Also good. The elastic body may be applied to the rear part forming the waist elastic body and / or to the front part forming the waist elastic body and / or on the part forming the side or leg opening of the final product.

  The invention also relates to a product produced by the method according to the above.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in several examples with the aid of the drawings.
FIG. 1 shows a web on a production line according to the invention.
FIG. 2 shows a schematic flow chart of the method according to the invention.
FIG. 3 shows a disposable pant according to the invention.

  Although the method of manufacturing the disposable pants according to the present invention is shown in a number of examples, these examples should not be considered as limitations of the present invention, but merely as examples of various methods for using the manufacturing method.

  FIG. 1 shows a web 1 on a production line according to the invention in a method for producing disposable pants 2 (see FIG. 3), for example a pant diaper.

  The method is intended to be used to produce a disposable pant 2 comprising a front part 3 and a rear part 4 and a central part 5 extending between them (the central part 5 extends into the user's crotch region during use). Is done. The disposable pants also include two sides 6 that extend between the front portion 3 and the back portion 4 over the user's waist side during use.

FIG. 2 shows an example of the present invention, where the method of manufacturing the disposable pants 2 includes the following steps (see FIG. 2):
a) A web 1 defined by two parallel and longitudinally extending first and second edges 7, 8 is continuously fed in the longitudinal direction. The longitudinal direction of the web coincides with the feeding direction or the traveling direction of the web. The web may be made of any material or mixture of materials suitable for that purpose, for example a liquid impervious material suitable for creating the outside of a disposable pant or disposable pant diaper. When using the method for making a disposable pant diaper, the web may include a liquid impermeable layer and a liquid permeable layer and one or several absorbent layers disposed therebetween. It is also possible to use a liquid permeable material for the web 1 and to place on the web an absorbent unit formed by a liquid impermeable layer and a liquid permeable layer and an absorbent body arranged therebetween. it can.
b) A number of first and second cut portions 9 ', 9 of the web 1 from the web 1 along first and second partial cut lines 10', 10 "arranged at a predetermined partial distance 11 from each other. ′ ′ Is cut. The partial distance 11 is preferably the distance between the side edges 12 of the central part 5 of the disposable pants 2, which side edges 12 define the width of the central part 5 of the disposable pants 2 in its unfolded state. . The first and second side edges 10 ', 10 "each describe the part of the disposable pant that is intended to be a leg opening.
c) The web 1 is cut along the first cutting line 13 extending from the first end edge 7 to the first point 17 on the first partial cutting line 10 ′, and the first cutting is performed on the second partial cutting line 10 ″. The web 1 is cut along a second cutting line 14 extending from the edge 7 to the second point 18 respectively, and a third cutting extending from the second edge 8 to the third point 19 on the first partial cutting line 10 '. The web 1 is cut along the line 15, and the web 1 is cut along the fourth cutting lines 16 that respectively extend from the second edge 8 to the fourth point 20 on the second partial cutting line 10 ″. In FIG. 1, the first, second, third and fourth cutting lines 13, 14, 15, 16 are shown as making an angle with respect to the edges 7, 8 of the web 1. 14, 15, 16 may be perpendicular to the edges 7, 8.

  The first and second cutting lines 13 and 14 are repeated in a pattern along the first end edge 7 extending in the longitudinal direction, and the first cutting line 13 is a predetermined first distance 21 with respect to the second cutting line 14. The first cutting line 13 is arranged at a predetermined third distance 23 with respect to another second cutting line 14, and the first distance 21 is larger than the third distance 23.

  The third and fourth cutting lines 15 and 16 are repeated in a pattern along the second edge 8 extending in the longitudinal direction, and the third cutting line 15 is at a predetermined second distance 22 with respect to the fourth cutting line 16. The third cutting line 15 is arranged at a predetermined fourth distance 24 with respect to another fourth cutting line 16, and the fourth distance 24 is greater than the second distance 22.

  Further, the first distance 21 is greater than the second distance 22 and the fourth distance 24 is greater than the third distance 23.

  The first, second, third and fourth cutting lines 13, 14, 15, 16 and the cutting portions 9 ', 9' 'divide the web into a number of first and second pant blanks 25,26. Here, the pants blanks 25 and 26 mean the disposable pants 2 before forming the side panels, and the disposable pants are not folded and are sufficiently flat. The first pant blank 25 has a first front part 27, a first rear part 28 and a first central part 29, which parts 27, 28, 29 are the front part 3, the rear part 4 and the finished disposable pant 2. Corresponds to the central portion 5. The second pant blank 26 has a second front part 36, a second rear part 37 and a second central part 38, which parts 36, 37, 38 are the front part 3, the rear part 4 and the finished disposable pant 2. Corresponds to the central portion 5.

  d) After cutting according to steps b) and c), each of the pant blanks 25, 26 is folded and their rear portions 28, 37 are folded over the front portions 27, 36 at a predetermined area, overlapping portion 30. The first pant blank 25 is such that the overlapping part 30 is defined by a predetermined distance from the first cutting line 13 to the third cutting line 15 and from the second cutting line 14 to the fourth cutting line 16 in the overlapping part. It can be folded. That is, when the first rear portion 28 is folded onto the first front portion 27 so that the first cutting line 13 lies on the front portion, the overlapping portion 30 is the distance between the first cutting line 13 and the third cutting line 15. These are the parts of the first pant blank 25 that constitute the same, and the same applies to the second cutting line. The first rear portion 28 folded on the first front portion 27 forms the side 6 of the final disposable pants. That is, the side portion 6 mainly consists of the first rear portion 28 by the first and second distances 21 and 22, but also the first front portion 27. The second pant blank 26 is folded in a manner corresponding to the first pant blank 25.

  e) The folded pant blanks 25, 26 are joined at overlapping portions by a reclosable material or by a permanent seam.

  The above manufacturing method of disposable pants is such that all individual second pant blanks lie parallel to all individual first pant blanks along the longitudinal direction of the web 1, but in the opposite direction to all individual first pant blanks. (Ie, adjusted so that the first pant blank 25 is parallel to the adjacent second pant blank and in the opposite direction relative to the second pant blank). And the second pant blanks 25, 26 can be more easily described as being continuously cut. The first distance 21 records the length in the running direction of the web 1 of the first rear portion 28 on all individual first pant blanks, and the fourth distance 24 is the first distance on all individual second pant blanks. Record the length of the second rear portion 37. The second distance 22 records the length of the first front portion 27 on all individual first pant blanks, and the third distance 23 is the second front portion 36 on all individual second opposing pant blanks. Record the length of.

  When the first pant blank 25 is folded and joined according to steps d) and e) above, the first rear portion 28 is joined to the first front portion 27 at the overlapping portion 30. A first rear portion 28 joined to the first front portion 27 forms the side 6 of the disposable pants. Side 6 is defined by the area of the disposable pants that extends over the waist side of the user during use (ie, between front panel 31 of front portion 3 and rear panel 32 of rear portion 4 of disposable pants 2). The second pant blank 26 is preferably folded and joined in a manner corresponding to the first pant blank 25, but may be folded and joined in another manner. For example, the first pant blank 25 may be folded and joined by reclosable means, while the second pant blank may be folded and joined with a permanent seam.

  If the disposable pants are assumed to be reclosable, the overlap may comprise hook and loop material or other suitable reclosable means. If the overlapping portions are to be permanently attached, a seam may be applied to secure the overlapping portions relative to each other. The seam may be the result of an operation such as welding, hot melt, ultrasonic, gluing, sewing or other suitable method. It may be a combination of a reclosable part having a seam that can be torn and a reclosable fastening means. A seam that can be torn may help the user hold the pants together when wearing the pants. Such a seam may be placed on the inside of the reclosable securing means.

  Since the first distance 21 exceeds the second distance 22, the coupling area of the overlapping portion 30 on the side 6 is displaced towards the front panel 31, which is the coupling area on the user's waist side which is common in the prior art. This is a great advantage compared to those with sides having

  The formation of the second pant blank 26 into a disposable pant can, of course, be made completely analogous to the description above in connection with the first pant blank of the leg opening.

  Although the disposable pants according to the present invention are described as having overlapping coupling regions, the rear portion can be coupled to the front portion by non-overlapping means. That is, the inner side of the rear part is joined to the inner side of the front part.

  Thus, one great advantage of the present invention is that the disposable pants can be made from a single web without using, for example, an elastic body in the front portion to pull the overlapping portion 30, i.e., the bonding area, toward the front portion. It is. The use of a single web (ie, a single pant blank that forms the disposable pants) also removes the bond area in the central portion of the disposable pants. Such a centrally located connecting region is common in the prior art and is known to cause irritation and discomfort to the user in the crotch region.

  The first and third cutting lines 13, 15 are advantageously mirror images of the second and fourth cutting lines on the horizontal imaginary center line 40 shown in FIG. The cutting portions 9 are advantageously arranged symmetrically with the longitudinal centerline 41 (see FIG. 1), but of course may be cut from the web in different patterns depending on the desired characteristics of the final product. . While the above symmetrically cut pant blanks advantageously yield a large number of first and second pant blanks having the same shape, the cutting line and the cut portion have different shapes for the first and second pant blanks. You may cut | disconnect by the method which has.

  In one example of the present invention, a method of manufacturing a disposable pant diaper is used (see FIG. 1) in which the absorbent body 33 is placed along the web at a predetermined fifth distance 34 between the absorbent bodies. The absorbent body may be placed before, during or after cutting the web depending on the process. One example is that the absorbent body 33 is placed on a layer of liquid impermeable material, and then a liquid permeable layer is placed on the absorbent body, and these layers and the absorbent form a web. Good.

  Each of the absorbers may be any suitable shape, such as a rectangle or an hourglass shape as shown in FIG.

  In one example of the present invention (see FIG. 1), the elastic means 35 is on the rear part, on the front part and on either side of each of the cutting parts 9 ', 9' 'partially along the edges 7,8 and Applied to the web at the central portions 29, 38 along the side edges 12. The elastic means 35 located along the side edge 12 on either side of the cutting part 9 ', 9' 'form a leg elastic body around the user's leg during use. The first elastic means 35 preferably intersect each other in a small loop at the central portions 29, 38 on all individual pant blanks 25, 26. The elastic means may be deactivated by cutting the elastic means (so-called snapback method).

  In another example (not shown), the elastic means are applied as described above, except that the elastic means do not intersect in the central part, but the two loops lie close to each other in the central part of the individual pant blanks. The

  Elastic means may be applied to the web as described above, but the two loops are connected to all individual pants so that the elastic means intersect each other somewhere along the side edges and there is no elastic means in the central part. It may be applied in a pattern placed on each of the front part and the rear part on the blank.

  Yet another possibility to apply the elastic means to the pant blank is first with a longitudinal sinusoid according to one side and side edge of the cut part on one pant blank and to the other side of the cut part on the adjacent pant blank. Placing elastic means and placing another elastic means in a longitudinal sinusoid according to the opposite side and corresponding side edges of said part.

  The elastic means may form leg elastics such as raised barriers, also known as upright gathers, or side barriers, or other suitable liquid holding means. Thus, the elastic means is at least along the edge of the cutting part forming the part of the pant diaper intended to surround the part of the user's leg (for example the partial cutting line 10 ', 10 "or the partial cutting line 10). It is advantageous to be placed on a part of ', 10' '(eg along the side edge 12). It is also possible to add a separate leg elastic in the central part 5, for example in the form of a cuff. Further, the elastic means may be applied to the pant blank such that the elastic means follows a partial cutting line lying essentially parallel to the edge, the elastic means intersecting each of the front part and the rear part on the pant blank. .

  In a further example, the elastic means 35 may be placed in a number of different patterns, for example an anti-phase zigzag pattern or an anti-phase sine. Anti-phase means that the two elastic means start from opposite starting points. The elastic means consists of two different elastic means intersecting each other at the central portion, where the elastic means is between the cut portions 9 ', 9' ', ie from one side 7, 8 of the web 1 at the central portions 29, 38. It may be applied to the web in such a way as to run to the other.

  The elastic means may be applied differently on the rear part forming the waist elastic and / or on the front part forming the waist elastic and / or on the part forming the side of the final product. The application of a separate leg elastic can also be combined with a separate waist elastic 39 (FIG. 1). The waist elastic body is of a type in which the elastic means contracts the pant blank in the direction of web supply and the leg elastic body contracts the finished product in the direction around the user's leg, ie along the side edges. It is advantageous that All of the methods described above for applying the elastic means can also be combined. The elastic means may advantageously have different characteristics at different locations of the disposable pants, for example different tensions, and / or may consist of different elastic materials or different compositions.

  The elastic means 35 intended for the leg elastics are advantageously made of yarn of the type placed in a curved pattern according to conventional methods and may be made entirely of elastic material, but may be made of sheets, for example elastic yarns. It may include a strip having a suitable elasticity applied at a suitable location along the nonwoven or sheet. Such a strip or sheet is preferably used when placing the waist elastic body 39 preferably along the web feeding direction. The sheet may be woven or non-woven or other suitable material. The elastic may be applied on a separate web sheet, which will be applied on the web 1. If a liquid permeable top sheet is applied to the pant blank on the absorbent body, elastic means can be applied to form a side barrier on the top sheet.

  Since the process is assumed to be a continuous process, it is advantageous to run the web with different rollers equipped for different purposes. Cutting may be done, for example, by running through a web on a pair of rollers having a cutting tool. The folding of the pant blank may be done by using a roller with a suction device intended to hold the corners of the pant blank when the pant blank is folded, for example by a mechanical arm. The joining of the rear part to the front part is done, for example, by passing the web through a pair of rollers equipped with a welding or gluing tool and a dolly separating the rear part from the front part leaving only the joining area to be joined. Also good.

  The invention should not be regarded as limited by the above examples, but all the above examples can be combined within the scope of the claims.

1 shows a web on a production line according to the invention. 2 shows a schematic flow chart of a method according to the invention. 1 shows a disposable pant according to the invention.

Claims (12)

a) a step of continuously supplying the web (1) along the travel path, wherein the web (1) has a longitudinal direction coinciding with the travel path and a lateral direction perpendicular to the longitudinal direction; and A step defined by said longitudinally extending first and second edges (7, 8); and b) cutting the web (1) into a number of first and second pant blanks (25, 26). Each blank has a front portion (27, 36) and a rear portion (28, 37), the portions being arranged in the transverse direction of the web (1) in sequence,
In a method of manufacturing disposable pants (2), including blanks (25, 26) such that all individual second blanks (26) are rotated 180 ° relative to all individual first blanks (25). The cutting is carried out in such a way that they are aligned in the longitudinal direction of the web (1).   The first distance (21) defines the length of the first rear portion (28) for each first pant blank (25) along the first end edge (7), and the second distance (22) is the second end. The length of the first front part for each first pant blank (25) along the edge (8) is defined, and the third distance (23) is the second pant blank (26) along the first end edge (7) ) Defining the length of the second front part (36) for each second, and the fourth distance (24) is the length of the second rear part (37) for each second pant blank along the second edge (8). The value obtained by dividing the first distance (21) by the second distance (22) and the value obtained by dividing the fourth distance (24) by the third distance (23) are 1.8 to 5.7. The method according to claim 1, wherein   Multiple first cut portions (9 ') of the web (1) are cut from the web (1) along the first partial cut line (10'), and multiple second cut portions (9 "'of the web (1) are cut. ) Is cut from the web (1) along the second part cutting line (10 ″), and the first and second cutting parts (9 ′, 9 ″) are cut at a predetermined interval. The method according to claim 1, wherein: a) The web (1) is cut along a first cutting line (13), each of the first cutting lines (13) being separated from the first end edge (7) on the first partial cutting line (10 '). Extending to one point (17),
b) The web (1) is cut along a second cutting line (14), each of the second cutting lines (14) being on the second partial cutting line (10 ″) and the first end edge (7). Extending to the second point (18),
c) The web (1) is cut along a third cutting line (15), each of which is cut from the second edge (8) on the first partial cutting line (10 '). Extending to three points (19),
d) The web (1) is cut along the fourth cutting line (16), each of the fourth cutting lines (16) on the second partial cutting line (10 ″) and the second edge (8). To the fourth point (20) from
The method according to claim 3.   One or all of the first, second, third and fourth cutting lines (13, 14, 15, 16) are one or both of the first and second partial cutting lines (10 ', 10 "). The method of claim 4, wherein the method matches at least a portion.   Each of the pant blanks (25, 26) is folded and the first and second front parts (27, 36) are joined to the first and second rear parts (28, 36), thus the first rear part (28). Can be resealably or permanently attached to the first front portion (27) and the second rear portion (37) can be resealably or permanently attached to the second front portion (36), thereby being disposable 6. The method according to claim 1, wherein the pants (2) are formed.   Each of the pant blanks (25, 26) is folded and the first and second front parts (27, 36) are joined to the first and second rear parts (28, 36), thus the first rear part (28). Can be resealably or permanently attached to the first front portion (27) in a manner that overlaps the overlap portion (30), and the second front portion in a manner that the second rear portion (37) overlaps the overlap portion (30). 7. A method according to claim 6, characterized in that it is recloseable or permanently attached to (36), thereby forming a disposable pant (2).   8. Method according to claim 7, characterized in that the overlapping part (30) is displaced towards the front part (3) of the disposable pants (2).   9. The method according to claim 1, wherein an absorbent body (33) is placed on each of the pant blanks (25, 26).   10. A method according to claim 1, wherein the elastic means (35) is applied to the web (1).   11. A method according to any of the preceding claims, characterized in that the web (1) comprises a liquid impermeable layer, a liquid permeable layer and an absorbent body therebetween.   A product manufactured by the method according to claim 1.

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