JP4865620B2 - Equipment for manufacturing disposable absorbent articles - Google Patents

Description

  The present invention relates to a disposable absorbent article manufacturing apparatus including a first sheet member joined to each other and a second sheet member having elasticity.

As a prior art regarding this kind of article and its manufacturing apparatus, for example, there is one described in Patent Document 1. In this prior art, a second sheet member provided with an elastic member is joined to the surface of a first sheet member which is an article body provided with an absorber. Then, by applying the elastic member to the pleats of the second sheet member, the pleats stand up to suppress the flow of fluid such as menstrual blood.
JP-A-6-169948

  However, in this type of absorbent article, when the second sheet member is applied to the first sheet member, the elastic member or the like included in the second sheet member is in a state where tension is strongly applied. There is a problem that the first and second sheet members are curled by the contraction force of the elastic member after the second sheet member is applied. When the absorbent article is curled in this way, it is difficult to handle even when the user uses it.

  Therefore, the problem to be solved by the present invention is to produce a disposable absorbent article that can prevent both sheet members from curling when the first sheet member is provided with a stretchable second sheet member. Is to provide a device.

To solve the above problems, the invention of claim 1, an apparatus for producing a disposable absorbent article comprising a first sheet member joined together, and a second sheet member having elasticity A first transport mechanism that allows a first continuous body, in which the first sheet members are continuously connected, to pass through a predetermined junction, and a second transport mechanism, in which the second sheet members are continuously connected. the continuum, a second transport mechanism for feeding the merging section in a stretched state at least in the longitudinal direction at the merging portion, furuncle one deflated by cutting the second continuum every predetermined length , and a merging forming mechanism to be applied to said first continuous body, the merging forming mechanism, the rotation speed of the second continuous body corresponding to the first conveying speed when introduced into the merging unit While being rotated by the second transport mechanism. An introduction roller that receives the continuum of 2 at its outer peripheral portion, a cutting portion that cuts the second continuum received by the introduction roller for each predetermined length, and an outer peripheral portion of the introduction roller. The second continuous body, which is disposed to face the outer peripheral portion and is rotated in the direction opposite to the introduction roller and cut to the predetermined length at the outer peripheral portion, is received from the introduction roller and received. A relay drum that imparts the continuum of 2 to the first continuum, and the relay drum is moved along a circular orbit and cuts the second continuum cut to the predetermined length. A plurality of transfer pads that receive from the introduction roller and apply the received second continuum to the first continuum; and the relay drum includes the second continuum cut to the predetermined length. , The longitudinal direction of the first continuum At intervals to impart to said first continuous body, spacing along said orbit between the transfer pad is periodically vary with position on the orbit of the transfer pad.

The moving speed of the outer peripheral portion of the case in the invention of claim 2, in the manufacturing apparatus of the disposable absorbent article according to the invention of claim 1, wherein the outer periphery of the front-Symbol repeater drum receives the second continuum Is set to be lower than the first transport speed.

Further, in the invention of claim 3, in the manufacturing apparatus of the disposable absorbent article according to the invention of claim 2, a moving speed when the said introduction roller before Symbol transfer pad receiving said second continuous body, the first The moving speed when the second continuous body is applied to the first continuous body is different.

According to a fourth aspect of the present invention, there is provided a manufacturing apparatus for a disposable absorbent article comprising a first sheet member joined to each other and a second sheet member having elasticity, the first sheet member. At least the longitudinal direction of the first conveying mechanism that continuously passes the first continuous body that is continuously connected to the predetermined joining portion and the second continuous body that is continuously connected to the second sheet member. A second transport mechanism that feeds the merging portion in a stretched state, and a merging formation that is applied to the first continuum while the second continuum is contracted in a continuous state at the merging portion. And the confluence forming mechanism is introduced by the second transport mechanism while rotating at a rotational speed corresponding to the transport speed when the second continuum is introduced into the confluence section. Receiving said second continuous body at its outer periphery; An introduction roller for applying the received second continuum to the first continuum, and the conveyance speed of the first continuum is when the second continuum is introduced into the introduction roller. The speed is set lower than the transport speed.

According to a fifth aspect of the present invention, in the disposable absorbent article manufacturing apparatus according to any one of the first to fourth aspects, the second sheet member has an elastic member and the elastic member is stretched. A non-stretchable member joined to the elastic member in a state, and the uneven distribution is generated by sagging or wrinkles of the non-stretchable member generated as the elastic member contracts.

Moreover, in invention of Claim 6, in the manufacturing apparatus of the disposable absorbent article of Claim 5 , the said 1st sheet | seat member is an absorber which absorbs the excretion which penetrates via the said 2nd sheet | seat member. Is provided.

The invention according to claim 7 is a disposable absorbent article manufacturing apparatus comprising a first sheet member joined to each other and a second sheet member having elasticity, wherein the first sheet member At least the longitudinal direction of the first conveying mechanism that continuously passes the first continuous body that is continuously connected to the predetermined joining portion and the second continuous body that is continuously connected to the second sheet member. A second transport mechanism that feeds the merging portion in a state stretched in a direction, and the merging portion cuts and contracts the second continuum for each predetermined length, The second sheet member includes an elastic member and a non-stretchable member joined to the elastic member in a state in which the elastic member is stretched, Sag of the non-stretchable member generated with shrinkage or Uneven distribution is generated by.

Moreover, in invention of Claim 8, in the manufacturing apparatus of the disposable absorbent article of Claim 7 , the said 1st sheet | seat member is the absorber which absorbs the excretion which penetrates via the said 2nd sheet | seat member. Is provided.

Moreover, in invention of Claim 9, in the manufacturing apparatus of the disposable absorbent article in any one of Claim 1 thru | or 8 , provided in the conveyance direction upstream of the said 1st continuous body of the said confluence | merging part, An adhesive application unit that applies an adhesive for joining the two continuous bodies to at least a portion of the first continuous body to which the second continuous body is applied is further provided.

According to invention of Claim 1 , Claim 4 and Claim 7, the 2nd continuous member which the 2nd sheet | seat member which has a stretching property continues continuously, and is conveyed in the expand | extended state. Is applied to the first continuous body in which the first sheet members are continuously connected while being contracted by being cut at predetermined lengths or contracted in a continuous state. Therefore, the second sheet member can be applied to the first sheet member in a state where the contraction force of the second sheet member is relaxed or eliminated, and the second sheet member is attached to the first sheet member. When applied, both sheet members can be prevented from curling.

  According to the second aspect of the present invention, the second continuous body is applied from the introduction roller to the first continuous body via the relay drum, and the outer peripheral portion of the relay drum is the second continuous body. The second continuum is obtained by utilizing a speed difference from the moving speed (first transport speed) of the second continuum when the introduction roller receives the second continuum. The stretched state of is relaxed or eliminated. This makes it possible to set the moving speed of the second continuum when applying the second continuum to the first continuum in accordance with the transport speed of the first continuum. The second continuum can be stably applied to the first continuum while preventing a shift or the like.

  According to the third aspect of the present invention, by utilizing the change in the moving speed of the transfer pad 84, the transport speed of the first continuum and the transport of the second continuum when introduced into the junction. An effective speed difference between the introduction roller side and the transfer pad side necessary for contracting the second continuum during transfer of the second continuum is generated while setting the speed independently and optimally. Can be made.

According to the first aspect of the present invention, the second sheet member (second continuous body cut into a predetermined length) is spaced apart in the longitudinal direction of the first continuous body. Therefore, it is convenient when the second sheet member only needs to be applied in a partial section in the longitudinal direction of the first continuous body (first sheet member).

According to the first aspect of the present invention, the second continuum cut to a predetermined length is applied to the first continuum by utilizing the periodic fluctuation of the interval along the circular orbit between the transfer pads. The distance along the longitudinal direction between the second continuums can be set to an optimum value.

According to the invention described in claim 4 , the second continuum introduced in the stretched state is used to join the first continuum to give the second continuum, and the second continuum is used to obtain the second continuum. The second continuum can be applied to the first continuum while relaxing or eliminating the stretched state of the continuum. As a result, the relay drum and the like can be omitted, and the apparatus configuration can be simplified.

According to the ninth aspect of the invention, since the second continuous body in which the stretched state is relaxed or eliminated is applied to the first continuous body to which the adhesive is applied, the second continuous body is bonded. Both continuums can be joined while maintaining the flexibility of the continuum. For example, when an adhesive is applied to the second continuum so as to be joined to the first continuum, the stretched state is relaxed or eliminated, and the wrinkles of the second continuum where wrinkles and the like are generated, etc. However, the present invention can avoid such inconvenience.

According to the disposable absorbent article manufactured by the manufacturing method according to claim 5 and claim 7 , the first non- stretchable member sag or wrinkle generated as the elastic member of the second sheet member contracts causes the first An uneven distribution is generated in the portion of the sheet member to which the second sheet member is applied. For this reason, the uneven distribution of the wearer can catch the fluid excrement of the loose stool of the wearer (for example, the solid component in the loose stool) so as not to spread, and the attachment range of excrement adhering to the skin is reduced to a small range. Can be suppressed. Further, since the second sheet member can be applied to the first sheet member while relaxing or eliminating the stretched state of the second sheet member, the absorbent article is prevented from curling due to the contraction force remaining on the second sheet member. be able to. As described above, the manufacturing apparatus according to the present invention can reduce the burden of wiping work of excrement adhered to the skin at the time of replacement of the disposable absorbent article, etc., and can reduce the wearer's discomfort and stretchability. A disposable absorbent article in which curling or the like due to the shrinkage force remaining on the member is suppressed can be manufactured satisfactorily.

Further, the second sheet member continuum (second continuum) manufactured in a state where the elastic member is stretched is stretched with the first sheet continuum (first continuum). it is introduced into the merging portion, while alleviating or eliminating extended state of the second continuum, for the second of the continuum can and Turkey be given to the first continuous body, constituting an efficient production line it can.

According to the invention described in claim 6 and claim 8 , a disposable absorbent article that includes an absorbent body and that can more effectively suppress the spread and leakage of excrement can be obtained with the contraction force remaining in the second sheet member. it can be excellently manufactured prevented from curling.

[First Embodiment]
First, the structure of the absorbent article manufactured with the manufacturing apparatus of the disposable absorbent article (henceforth "absorbent article") based on this invention is demonstrated.

  FIG. 1 is a plan view of an absorbent article as an application example of the absorbent article manufacturing apparatus according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line A1-A1 of FIG. 3 is a plan view of the surface liner provided in the absorbent article of FIG. 1 in a contracted state, and FIG. 4 is a cross-sectional view taken along line A2-A2 of FIG. In addition, below, when the absorbent article 10a is mounted so as to cover the wearer's crotch, the direction of the absorbent article 10a corresponding to the front / rear direction of the wearer's crotch (the vertical direction in FIG. 1) is “ It is referred to as “front-rear direction”, and the direction (lateral direction in FIG. 1) of the absorbent article 10 a corresponding to the left-right direction by the wearer is referred to as “left-right direction”. Moreover, the side of the absorbent article 10a corresponding to the front side (abdominal side) of the wearer's crotch is referred to as “front side”, and the absorbent article 10a corresponding to the rear side (rear side) of the wearer's crotch. This side is called the “rear side”. In FIG. 1, the upper side in the figure is the front side of the absorbent article 10a.

  The absorbent article 10a shown in FIG.1 and FIG.2 is used as a disposable diaper, and is provided with the main body 9 and the surface liner 1a. The first sheet member according to the present invention corresponds to the main body 9 before the side sheet 12 described later is applied, and the surface liner 1a corresponds to the second sheet member having elasticity. is doing.

  The main body 9 of the absorbent article 10 a has a structure in which an absorbent body 14 extending in the front-rear direction is sandwiched between a top sheet 11 and a back sheet 13. Thereby, these are laminated | stacked and arrange | positioned in order of the top sheet 11, the absorber 14, and the back sheet | seat 13 from the skin surface side (refer FIG. 2). With such a laminated structure, the liquid component of excrement passes through the top sheet 11 and is absorbed by the absorbent body 14, and is prevented from exuding to the outside by the back sheet 13.

  As a material of the top sheet 11, for example, a liquid-permeable nonwoven fabric or the like is used. As a material of the back sheet 13, for example, a water-repellent nonwoven fabric, a plastic film or the like is used alone or in combination.

  Examples of the absorbent body 14 include an absorbent core formed by mixing a granular polymer absorbent body with a hydrophilic fiber aggregate layer such as pulverized pulp fiber or cellulose fiber, a paper sheet such as tissue paper, or a liquid-permeable nonwoven fabric sheet. And the like, and those formed into a predetermined shape (rectangular shape, hourglass shape, gourd shape, etc.).

  Further, a side sheet 12 is provided on the end of the main body 9 in the left-right direction so as to overlap the top sheet 11 along the longitudinal direction. A thread rubber 15 is disposed at an end of the side sheet 12 on the center side, and a part of the side sheet 12 rises toward the skin surface side by the contraction of the thread rubber 15 and functions as a side three-dimensional gather. Side leakage of excrement is prevented by this side solid gather. Examples of the material for the side sheet 12 include a liquid-impervious plus chip film and a water-repellent nonwoven fabric.

  Next, the configuration of the surface liner 1a will be described. The surface liner 1a includes a sheet-like excrement receptacle 20 that constitutes a surface for receiving excrement. The excrement receptacle 20 has a substantially rectangular outer shape and includes a plurality of tape-like members extending in a band shape. The plurality of tape-shaped members are arranged in a lattice shape. Specifically, the excretion receptacle 20 includes a plurality of tape-like members (hereinafter referred to as short-side tape-like members) 2 that extend substantially parallel to each other along the short direction (lateral direction) and each other along the longitudinal direction. A plurality of tape-shaped members (hereinafter referred to as longitudinal tape-shaped members) 3 extending substantially in parallel are bonded with an adhesive. Therefore, the plurality of short tape-shaped members 2 and the plurality of long tape-shaped members 3 are arranged substantially orthogonally.

  A plurality of tape-like members extending along the same direction are arranged with a plurality of short tape-like members 2 on the same main surface (surface in FIG. 3) of the excrement receptacle 20, and a plurality of tape-like members on the other main surface. The longitudinal tape-shaped member 3 is arranged. The width of the tape-like members 2 and 3 is preferably about 1 mm or more and about 30 mm or less, more preferably about 3 mm or more and about 20 mm or less, and further preferably about 5 mm or more and about 15 or less.

  As shown in FIG. 4, each short tape-shaped member 2 is sandwiched between two tape-shaped nonwoven fabrics 21 and 22 as non-stretchable members and both the tape-shaped nonwoven fabrics 21 and 22 in an expanded state. A thread-like elastic member 41 as a joined elastic member is provided. Therefore, when the thread-like elastic member 41 contracts, a number of slacks or wrinkles are irregularly formed on the tape-like nonwoven fabrics 21 and 22, as shown in FIG.

  Similarly, each longitudinal tape-shaped member 3 includes two tape-shaped non-woven fabrics 31 and 32 as non-stretchable members, and elastic members sandwiched and joined between the two tape-shaped non-woven fabrics 31 and 32. And a thread-like elastic member 42. Therefore, when the thread-like elastic member 42 contracts, a number of slacks or wrinkles are irregularly formed on the tape-like nonwoven fabrics 31 and 32 as shown in FIG. Since the thread-like elastic members 41 and 42 are distributed in the vertical and horizontal directions throughout the excrement receptacle 20, the excrement receptacle 20 can be expanded and contracted.

  As a material for the tape-shaped nonwoven fabrics 21, 22, 31, and 32, a liquid-permeable nonwoven fabric is employed in order to increase the absorption efficiency of excrement. As the liquid-permeable nonwoven fabric, the surface of a nonwoven fabric using hydrophilic fibers (cellulose, rayon, cotton, etc.) or hydrophobic fibers (polypropylene, polyethylene, polyester, polyamide, nylon, etc.) is treated with a surfactant. And non-woven fabric made liquid-permeable. In addition, as a material for the tape-shaped nonwoven fabrics 21, 22, 31, and 32, a plastic film having minute openings may be used.

  Moreover, as a raw material of the thread-like elastic members 41 and 42, an elastic stretchable material used for general absorbent articles such as polyurethane thread and natural rubber can be used. For joining the thread-like elastic members 41 and 42, joining means such as adhesion using a hot melt adhesive, heat welding, ultrasonic welding, etc. can be employed.

  Further, the plurality of short tape-like members 2 are arranged in a state of being separated from each other, and the plurality of long tape-like members 3 are also arranged in a state of being separated from each other. Thereby, the whole main surface of the excretion receptacle 20 has a large number of rectangular through-holes (openings that penetrate from one main surface to the other main surface) substantially in each of the longitudinal direction and the short-side direction. 91 is formed in a dispersed manner. In this way, by arranging the plurality of short tape-shaped members 2 and the plurality of long tape-shaped members 3 in different directions, the through holes 91 are dispersed and formed by the gaps between the tape-shaped members 2 and 3. Therefore, no heat treatment is required for the formation of the through hole 91.

  The surface liner 1a having such a configuration is such that its longitudinal direction is along the front-rear direction of the absorbent article 10a, and its end in the short direction is sandwiched between the top sheet 11 and the side sheet 12. To the main body 9. Thereby, the excretion receptacle 20 of the surface liner 1a is located on the skin surface side with respect to the laminated structure of the top sheet 11, the absorber 14, and the back sheet 13, and is exposed on the surface.

  In addition, the surface liner 1a should be disposed at a portion that is offset toward the rear side of the center portion in the front-rear direction of the absorbent article 10a so as to reliably receive stool and not cause discomfort to the wearer's abdomen. Is preferred. Furthermore, it is desirable that the surface liner 1a is disposed so that the main surface of the excrement receptacle 20 on which the short tape-like member 2 is disposed is on the skin surface side. Thereby, the some short tape-shaped member 2 is arrange | positioned on the skin surface side along the left-right direction of the absorbent article 10a, and the some longitudinal tape-shaped member 3 is the main body 9 side along the front-back direction of the absorbent article 10a. (Hereinafter referred to as “main body side”).

  Next, the function and the like of the absorbent article 10a will be described by taking as an example a case where loose excreta including a liquid component such as loose stool and a fixed component is excreted during use of the absorbent article 10a. Since such loose excrement tends to flow in a state where a liquid component and a solid component are mixed, diffusion of the absorbent article in the front-rear direction is particularly problematic.

  Therefore, in this absorbent article 10a, by providing the surface liner 1a, the diffusion of loose excrement can be suppressed. That is, the excreted excreted matter is received by the main surface on the skin side of the excrement receiving body 20 of the surface liner 1a. Then, excrement enters between the plurality of short tape-like members 2 and further enters the main body side of the excretion receptacle 20 through the plurality of through holes 91 and the like.

  On the skin surface side of the excrement receptacle 20, the flow of excrement is blocked by the plurality of short tape-like members 2. Since the plurality of short tape-like members 2 are along the left-right direction of the absorbent article 10a, the flow of excrement in the front-rear direction (longitudinal direction of the excretion receptacle 20) is effectively suppressed. Further, since the slack or wrinkle is formed by the thread-like elastic member 41 and the substantial thickness of the short tape-like member 2 is increased, the short tape-like member 2 effectively functions as a wall for blocking the flow of excrement.

  On the other hand, on the main body side of the excrement receptacle 20, excrement enters between the plurality of longitudinal tape-like members 3 along the front-rear direction of the absorbent article 10a. The longitudinal tape-like member 3 is also capable of accommodating a relatively large amount of excrement since slack or wrinkles are formed by the thread-like elastic member 42 and its substantial thickness is increased. At the same time, excrement passes between slacks or ridges formed on the longitudinal tape-like member 3 and spreads in the left-right direction of the absorbent article 10a.

  The excrement receptacle 20 of the surface liner 1a is formed between the short tape-like members 2, between the long tape-like members 3, the through holes 91, and slack or wrinkles of the tape-like members 2 and 3 themselves. A variety of uneven distribution is given. That is, a part of the uneven distribution is given as a slack or wrinkle distribution of the tape-like members 2 and 3 themselves. In particular, solid components of excreta can be accumulated in these irregularities. Since the uneven distribution is irregular due to irregular slack or wrinkles of the tape-like members 2 and 3, a wide variety of excrement can be retained. Further, since the substantial thickness of the tape-like members 2 and 3 is increased by the thread-like elastic members 41 and 42, the size of the unevenness can be increased and a large amount of excrement can be accumulated. As a result, the spread of excreta over a wide range is effectively prevented.

  Moreover, the liquid component of the excrement is absorbed by the absorber 14 when it reaches the main body 9 of the absorbent article 10a. A large number of through holes 91 are dispersedly formed on the main surface of the excrement receptacle 20, and the excrement receptacle 20 is made of a liquid-permeable nonwoven fabric. Will reach the main body 9 quickly. Moreover, on the main body side of the excretion receptacle 20, the excrement spreads in the left-right direction of the absorbent article 10a, so that the liquid component is absorbed in a wide range of the absorber 14. Therefore, the absorption efficiency of the liquid component of excrement by the absorber 14 can be greatly improved. As a result, the flow amount of the liquid component is reduced and the excrement flow itself is suppressed, so that the excrement is further prevented from spreading to a wide range.

  The large number of through holes 91 formed in the excretion receptacle 20 serve as a path for allowing excrement to permeate to the main body side, and also function as a space for accumulating and accumulating excrement. Since the plurality of through holes 91 are distributed approximately periodically over the entire main surface of the excretion receptacle 20, the absorption efficiency and the accumulated amount of excretion can be improved uniformly with respect to the entire excretion receptacle. Can do. As a result, even if the excrement is received at any position of the excrement receptacle 20, the diffusion of the excrement is effectively prevented.

In addition, if each opening area of these through-holes 91 is too small, the amount of money and accumulation amount of excrement will fall, but conversely, if the opening area is too large, the excrement that has once entered the body side will be on the skin surface. There is also the possibility of backflowing to the side. For this reason, each opening area of these through-holes 91 is in a non-expanded state of uneven distribution (a state in which the thread-like elastic members 41 and 42 are contracted and slack or wrinkles due to the thread-like elastic members 41 and 42 are not stretched). , Preferably about 1 mm ² or more and about 900 mm ² or less, more preferably about 4 mm ² or more and about 700 mm ² or less, more preferably about 10 mm ² or more and about 400 mm ² or less. As a result, excrement backflow can be prevented while maintaining excretion absorption efficiency.

  As mentioned above, when the absorbent article 10a provided with such a surface liner 1a is used, diffusion of excrement to a wide range is effectively prevented. As a result, since the area where excrement touches the skin of the wearer is reduced, it is possible to prevent skin irritation and to reduce the burden of wiping off excrement adhering to the skin (especially its solid components). Can do.

In addition, as a modification of the above-described absorbent article 10a, the surface liner 10a may be disposed outside the top sheet 11 (side away from the skin surface), for example, between the top sheet 11 and the absorbent body 14. In this case, you may make it provide an opening part in at least one part of the part facing the surface liner 10a of the top sheet 11. FIG. In the case of this configuration, the back sheet 13 and the absorber 14 that are components other than the top sheet 11 provided in the main body 9 correspond to the first sheet member according to the present invention. This modification can also be applied to an absorbent article 10b shown in FIG.

  Next, the manufacturing process of the above-mentioned absorbent article 10a will be described.

In the absorbent article 10a having the above-described configuration, the surface liner 1a has stretchability, and therefore, when the surface liner 1a is applied to the non-stretchable body 9 having substantially no stretchability. In addition, if the thread-like elastic members 41 and 42 included in the surface liner 1a are in a state of being strongly tensioned, the absorbent article 10a is curled by the contraction force of the thread-like elastic members 41 and 42 after the surface liner 1a is applied. Will end up. If the absorbent article 10a is curled in this way, it is difficult to handle even when the user uses it.

  Therefore, in the manufacturing process according to the present embodiment, as shown in FIG. 5, the surface liner 1a (the state shown by the solid line in FIG. 5) manufactured in the stretched state is contracted by relaxing or eliminating the stretched state. Then, after the tension applied to the thread-like elastic members 41 and 42 is relaxed or eliminated (indicated by the phantom line in FIG. 5), it is applied (joined) to the main body 9. More specifically, in this embodiment, the surface liner 1a is applied to the main body 9 after the stretched state of the thread-like elastic members 41 and 42 is substantially eliminated. The surface liner 1a is applied to the main body 9 before the side sheet 12 is applied, and the side sheet 12 is applied to the main body 9 after the surface liner 1a is applied.

  Here, the dimension L1 in the longitudinal direction of the surface liner 1a in the stretched state (the state of production or transporting process) is set to, for example, about 450 mm, and the dimension W1 in the lateral direction is set to, for example, about 280 mm. Further, the dimension L2 in the longitudinal direction of the surface liner 1a in the contracted state (state when applied to the main body 9) is set to, for example, about 205 mm, and the dimension W2 in the lateral direction is set to, for example, about 145 mm.

  FIG. 6 is a diagram schematically showing the configuration of the manufacturing apparatus 50 used in the manufacturing process according to the present embodiment. As shown in FIG. 6, the manufacturing apparatus 50 includes a main body preparation unit 51, a surface liner preparation unit 52, first and second transport mechanisms 53 and 54, a merge formation mechanism 55, and an adhesive application unit 56. And a cutting mechanism 57.

  The main body production unit 51 continuously produces and sends out a first continuous body 61 in which the portion of the main body 9 of the absorbent article 10a excluding the side sheet 12 is continuously connected in the front-rear direction of the absorbent article 10a.

  The surface liner production part 52 continuously produces and sends out a second continuous body 62 in which the surface liner 1a is continuously connected in the longitudinal direction. The second continuous body 62 is produced and sent out in a state where the second continuous body 62 is expanded in the longitudinal direction and the width direction, that is, in a state where the thread-like elastic members 41 and 42 included therein are expanded.

  The first transport mechanism 53 is configured to include a plurality of transport rollers, a transport conveyor, or the like, and allows the first continuous body 61 sent from the main body preparation unit 51 to pass through the junction B and the cutting mechanism 57.

  The second transport mechanism 54 includes a plurality of transport rollers, a transport conveyor, or the like, and maintains a stretched state in the longitudinal direction and the width direction of the second continuous body 62 manufactured by the surface liner manufacturing unit 52. However, it is introduced into the junction B. The second transport mechanism 54 is provided with a width adjusting unit 71 for adjusting the extended state of the second continuous body 62 in the width direction. For example, the width adjusting unit 71 extends the second continuous body 62 contracted in the width direction in the width direction (expands it) and introduces it into the junction B. Thus, when the second continuous body 62 is cut at predetermined lengths by the cutting portion 73 of the merging formation mechanism 55 described later, it is possible to prevent the continuous body 62 from being wrinkled and causing a cutting failure. As this cutting failure, for example, the continuous body 62 cannot be cut completely, or the cutting line is disturbed.

  The adhesive application unit 56 is provided with a hot melt adhesive (for example, an olefin-based adhesive) on a portion where the surface liner 1a of the first continuous body 61 transported by the first transport mechanism 53 is joined before the junction B. (Hot melt adhesive) 86 is applied. Examples of the application method of the adhesive 86 include a non-contact application method (spiral application, curtain application, etc.) in which the discharge part of the hot melt adhesive 86 is not brought into contact with the first continuous body 61, or a coating head part. A contact-type coating method that performs coating while being substantially in contact with the first continuous body 61 can be adopted, but a non-contact type coating method is effective for maintaining the flexibility of the absorbent article 10a. It is.

  As shown in FIG. 7, the merge formation mechanism 55 includes an introduction roller 72, a cutting unit 73, a relay drum 74, and a backup roller 75.

  The introduction roller 72 rotates the second continuous body 62 introduced by the second transport mechanism 54 while rotating at a rotational speed corresponding to the transport speed V1 when the second continuous body 62 is introduced into the junction B. Receive and pass to relay drum 74. That is, the moving speed V <b> 2 in the circumferential direction of the outer peripheral portion of the introduction roller 72 is set equal to the conveyance speed V <b> 1 when the second continuous body 62 is introduced into the introduction roller 72.

  A plurality of air suction holes for sucking the second continuous body 62 are provided on the outer peripheral portion of the introduction roller 72. For this reason, the second continuous body 62 is conveyed while being attracted to the outer peripheral portion of the introduction roller 72 through the suction hole from when it is received by the introduction roller 72 until it is delivered to the relay drum 74. However, when the second continuous body 62 cut to a predetermined length is transferred to a transfer pad 84 (to be described later) of the relay drum 74, the suction force by the suction holes is relaxed or released.

  The cutting portion 73 is disposed opposite to the outer peripheral surface of the introduction roller 72 on the upstream side in the transport direction of the second continuous body 62 from the portion where the introduction roller 72 faces the relay drum 74, and winds around the introduction roller 72. In this way, the second continuous body 62 conveyed is cut every predetermined length. When the second continuous body 62 is cut by the cutting portion 73, the introduction roller 72 functions as an anvil for the cutting blade of the cutting portion 73. Such a cutting | disconnection part 73 is comprised by the cutter roller etc. which have a cutter blade in the outer peripheral part of the rotating roller, for example.

  When the second continuous body 62 is cut by the cutting portion 73, the second continuous body 62 is adsorbed to the outer peripheral portion of the introduction roller 72, so that the tension applied to the second continuous body 62 by the cutting is reduced. Even if the second continuous body 62 is opened, the stretched state of the portion of the second continuous body 62 that has been cut is substantially maintained (or maintained at a predetermined ratio) so that the second continuous body 62 is conveyed to the transfer section with the relay drum 74. It has become.

  As shown in FIGS. 8A and 8B, the relay drum 74 includes a support 81, a drive pulley 82, a drive link 83, a plurality of (for example, three) transfer pads 84, and a transfer pad 84. The same number of links 85 are provided.

  The support 81 rotatably supports the rotation shafts of the drive pulley 82 and the drive link 83, and supports the transfer pad 84 movably along the outer peripheral portion thereof. The drive pulley 82 is connected to the drive link 83 by a rotary shaft, and the drive link 83 is moved at a constant speed in the direction opposite to the rotation direction of the introduction roller 72 and the backup roller 75 based on rotational power given from a power source (not shown). Rotate. As a result, the connecting portion between the drive link 83 and the link 85 circulates in the direction opposite to the introduction roller 72 and the backup roller 75 along the circular track C1.

  The transfer pads 84 are arranged at equal intervals in the circumferential direction on the outer periphery of the support 81 and are movable along the outer periphery of the support 81. Further, the transfer pad 84 is connected to the drive link 83 by a link 85. Therefore, the transfer pad 84 moves along the outer peripheral portion (circular orbit C2) of the support 81 as the drive link 83 rotates. The circular orbit C2 of the transfer pad 84 is set so that the transfer pad 84 passes in the vicinity of the outer peripheral portions of the introduction roller 72 and the backup roller 75.

  The transfer pad 84 is provided with a plurality of air suction holes for adsorbing the surface liner 1a which is the second continuous body 62 cut to a predetermined length. When the transfer pad 84 passes in the vicinity of the introduction roller 72, the surface liner 1a is received by being pulled off from the introduction roller 72 by the suction force of the suction hole. At the time of delivery, the suction force of the suction hole in the portion of the introduction roller 72 facing the transfer pad 84 is relaxed or released.

  The transfer pad 84 that has received the surface liner 1a advances to a position facing the backup roller 75 along the circular path C2. Then, the surface liner 1 a attached to the transfer pad 84 and the first continuous body 61 conveyed by the first conveyance mechanism 53 are sandwiched between the transfer pad 84 and the backup roller 75. The front liner 1a is joined to a predetermined portion of the first continuous body 61 by the hot melt adhesive 86 applied to the first continuous body 61 by the adhesive application unit 56. Note that the suction force of the suction holes of the transfer pad 84 is relaxed or released when the surface liner 1a is delivered.

  The center D1 of the circular orbit C1 of the connecting portion between the link 85 and the drive link 83 and the center D2 of the circular orbit C2 of the transfer pad 84 are shifted by a predetermined dimension. For this reason, the drive link 83 is rotated at a constant speed, but the moving speed of the transfer pad 84 is periodically changed according to the position on the track C1. For this reason, by utilizing the change in the moving speed of the transfer pad 84, the conveying speed V5 of the first continuous body 61 and the conveying speed V1 of the second continuous body 62 are independently optimized as will be described later. An effective speed difference between the introduction roller 72 side and the transfer pad 84 side necessary for contracting the surface liner 1a during delivery of the surface liner 1a can be generated while the value is set to a small value. .

  Specifically, when the transfer pad 84 passes in the vicinity of the introduction roller 72, that is, when the transfer liner 84 receives the surface liner 1 a cut from the introduction roller 72, the transfer pad 84 moves to the backup roller 75. The moving speed V4 of the transfer pad 84 is different from each other when the surface liner 1a is applied to the first continuous body 61. In the present embodiment, the moving speed V4 is set faster than the moving speed V3.

  In this embodiment, the moving speed V3 when the transfer pad 84 receives the surface liner 1a from the introducing roller 72 is set slower than the moving speed V2 of the outer peripheral portion of the introducing roller 72. For this reason, a difference in the moving speed between the transfer pad 84 and the outer periphery of the introduction roller 72 when the surface liner 1a is transferred from the introduction roller 72 to the transfer pad 84, or the surface liner 1a from the introduction roller 72 side to the transfer pad 84 side. Due to the influence of a temporary free state when moving in the air, the stretched state of the surface liner 1a in the longitudinal direction is relaxed or eliminated. Further, the stretched state of the surface liner 1a in the short direction (width direction) is alleviated or eliminated by the influence of a temporary free state or the like when the surface liner 1a moves in the air from the introduction roller 72 side to the transfer pad 84 side. It has come to be. In the present embodiment, accompanying this delivery, the stretched state of the surface liner 1a in the longitudinal direction and the short direction is substantially eliminated.

  In this embodiment, the moving speed V4 when the transfer pad 84 applies the surface liner 1a to the first continuous body 61 is equal to the transport speed V5 of the first continuous body 61 by the first transport mechanism 53. It is set to be. As a result, the transfer pad 84 can stably apply the surface liner 1a to the first continuous body 61.

  Here, the conveyance speed V1 when the second continuous body 61 is introduced into the junction B and the movement speed V2 of the outer peripheral portion of the introduction roller 72 are set to, for example, about 45 m / min. Further, the moving speed V3 of the transfer pad 84 when receiving the surface liner 1a from the introduction roller 72 is set to, for example, about 20.5 m / min. The moving speed V4 of the transfer pad 84 when the surface liner 1a is applied to the first continuous body 61 and the transport speed V5 when the first continuous body 61 passes the junction B are about 54 m / min, for example. Is set.

  Further, in the present embodiment, the plurality of transfer pads 84 arranged at intervals in the circumferential direction of the relay drum 74 sequentially receive the surface liner 1a while contracting the surface with the introduction roller 72. The surface liner 1a is sequentially applied to the first continuous body 61 to be conveyed. Accordingly, the surface liner 1a is applied to the first continuous body 61 with a gap in the longitudinal direction of the first continuous body 61 (the front-rear direction of the absorbent article 10a).

  More specifically, due to the deviation of the centers D1 and D2 of the circular orbits C1 and C2, the interval along the circular orbit C2 between the transfer pads 84 also periodically varies depending on the position of the transfer pad 84 on the circular orbit C2. (This function is hereinafter referred to as “re-pitch function”). In this embodiment, the interval between the transfer pads 84 when passing near the introduction roller 72 and the interval between the transfer pads 84 when passing near the backup roller 75 are set to different values. For example, the interval between the transfer pads 84 is set larger when passing near the backup roller 75 than the interval between the transfer pads 84 passing near the introduction roller 72. Thus, the interval along the longitudinal direction between the surface liners 1a when the surface liner 1a is applied to the first continuous body 61 can be set to an optimum value.

  The interval along the circular path C2 between the transfer pads 84 when passing near the introduction roller 72 is the contraction in the longitudinal direction of the surface liner 1a when the surface liner 1a is transferred from the introduction roller 72 to the relay drum 74. It is decided according to the rate. The length of the transfer pad 84 along the circular orbit C2 is determined according to the length in the longitudinal direction of the surface liner 1a after contraction.

  The cutting mechanism 57 cuts the first continuous body 61 provided with the surface liner 1a into product units. The cutting mechanism 57 may be used to shape the outer shape of the first continuous body 61 (such as excision of an unnecessary portion of the outer edge).

  Although omitted in the configuration shown in FIG. 6, in an actual production line, the side sheet 12 is attached to the first continuous body 61 provided with the surface liner 1 a between the merge formation mechanism 55 and the cutting mechanism 57. The side sheet | seat provision part which provides is provided.

  Next, the manufacturing process of the absorbent article 10a using the manufacturing apparatus 50 will be described.

The manufacturing process of the absorbent article 10a is as shown in FIG.
(S1) Main body production process (S2) Surface liner production process (S3) First introduction process (S4) Second introduction process (S5) Merging process (S6) A product cutting process is provided.

And the merging step (S5)
(S5-1) Liner cutting step (S5-2) Liner delivery step (S5-3) A liner application step is provided. The main body production step S1 and the first introduction step S3, and the surface liner production step S2 and the second introduction step S4 are processed in parallel.

  In the main body production step S1, the main body production unit 51 continuously produces and sends out the first continuous body 61 described above.

  In the surface liner manufacturing step S2, the above-described second continuous body 62 is continuously manufactured and sent out by the surface liner manufacturing unit 52. At this time, the second continuous body 62 is produced and sent out in a state where the second continuous body 62 is stretched in the longitudinal direction and the width direction, that is, in a state where the thread-like elastic members 41 and 42 included therein are stretched.

  In the first introduction step S <b> 3, the first continuous body 61 sent out from the main body preparation unit 51 is sent into the junction B by the first transport mechanism 53. The first continuous body 61 sent to the junction B is introduced so as to be sandwiched between the relay drum 74 and the backup roller 75 of the junction formation mechanism 55.

  Moreover, in this introduction process S3, hot melt adhesion is applied to the portion where the surface liner 1a of the first continuous body 61 is joined by the adhesive application unit 56 as described above. Thus, in this embodiment, since the surface liner 1a in a state in which the stretched state is relaxed or eliminated is applied to and bonded to the first continuous body 61 to which the hot melt adhesive 86 is applied, As described above, the surface liner 1a can be joined to the main body 9 while maintaining the flexibility and the like of the surface liner 1a.

  In the second introduction step S <b> 4, the second continuous body 62 produced by the surface liner production unit 52 is held by the second conveyance mechanism 54 described above while maintaining the stretched state in the longitudinal direction and the width direction. Introduced into B. At the time of introduction, as described above, for example, the second continuum 62 contracted in the width direction is expanded in the width direction (expanded) and introduced into the junction B by the width adjusting unit 71. It is like that. Thus, when the second continuous body 62 is cut at predetermined lengths by the cutting portion 73 of the merging formation mechanism 55 described later, it is possible to prevent the continuous body 62 from being wrinkled and causing a cutting failure.

  The second continuous body 62 introduced into the joining part B is introduced into the cutting part 73 so as to be wound around the introduction roller 72 of the joining formation mechanism 55.

  In the merging step S5, the second continuum 62 is joined to the first continuum 61 at the merging portion B while being cut and contracted every predetermined length. More specifically, in the liner cutting step S5-1, the second continuous body 62 that is conveyed while being stretched so as to be wound around the introduction roller 72 is cut at predetermined lengths. The second continuous body 62 cut to a predetermined length becomes the surface liner 1a.

  In the subsequent liner delivery step S5-2, the surface liner 1a is delivered from the introduction roller 72 to the transfer pad 84 of the relay drum 74. At this time, as described above, the moving speed V3 of the transfer pad 84 is set slower than the moving speed V2 of the outer peripheral portion of the introduction roller 72. For this reason, due to the influence of the movement speed difference between the transfer pad 84 and the outer peripheral portion of the introduction roller 72, the temporary free state when the surface liner 1a moves from the introduction roller 72 side to the transfer pad 84 side, etc. The stretched state in the longitudinal direction of the surface liner 1a is relaxed or eliminated. Further, the stretched state of the surface liner 1a in the short direction (width direction) is alleviated or eliminated by the influence of a temporary free state or the like when the surface liner 1a moves in the air from the introduction roller 72 side to the transfer pad 84 side. It has come to be. In the present embodiment, along with this delivery, the stretched state of the surface liner 1a in the longitudinal direction and the lateral direction is substantially eliminated.

  In the subsequent liner applying step S <b> 5-3, the surface liner 1 a applied to the transfer pad 84 and the first continuous body 61 transported by the first transport mechanism 53 are transferred between the transfer pad 84 and the backup roller 75. The surface liner 1a is joined to a predetermined portion of the first continuous body 61 by the hot melt adhesive 86 applied to the first continuous body 61 by the adhesive application unit 56. At this time, since the moving speed V4 of the transfer pad 84 is set to be equal to the transport speed V5 of the first continuous body 61, the transfer liner 84 applies the surface liner 1a to the first continuous body 61. It can be done stably.

  Further, in this liner applying step S5-3, due to the above-described re-pitch function of the relay drum 74, the interval along the circular orbit C2 between the transfer pads 84 is used when the surface liner 1a is applied to the first continuous body 61. It is changed to correspond to the interval. For this reason, the space | interval along the longitudinal direction between the surface liners 1a at the time of providing the surface liner 1a to the 1st continuous body 61 can be set now to an optimal value.

  In the subsequent product cutting step S6, the cutting mechanism 57 cuts the first continuous body 61 provided with the surface liner 1a into product units. At this time, the cutting mechanism 57 may be used to shape the outer shape of the first continuous body 61 (such as excision of an unnecessary portion of the outer edge).

  In addition, although it demonstrated abbreviate | omitting here, in an actual manufacturing process, it is the 1st continuous body 61 to which the surface liner 1a was provided by the side sheet | seat provision part between the merging process S5 and the product cutting process S6. A side sheet 12 is provided. Further, as described above, when the surface liner 1a is disposed outside the top sheet 11, the top sheet 11 and the side sheet 12 are provided in the process between the merging step S5 and the product cutting step S6. The

  As described above, according to the present embodiment, the first continuous body is stretched and cut while being contracted by cutting the second continuous body 62 conveyed in the stretched state every predetermined length. 61. Therefore, the surface liner 1a can be applied to the second continuous body 61 in a state where the contraction force of the surface liner 1a, which is the second continuous body 62 cut to a predetermined length, is relaxed or eliminated. This can prevent the absorbent article 10a from curling when the first continuous body 61 provided with the surface liner 1a is cut into product units. Thus, as described above, the absorbent article 10a that can effectively prevent the diffusion of loose stool or the like due to the uneven distribution of the surface liner 1a can be satisfactorily produced by preventing curling after the production.

  Further, a difference in moving speed between the transfer pad 84 and the outer periphery of the introduction roller 72 when the surface liner 1a is transferred from the introduction roller 72 to the transfer pad 84, or the surface liner 1a from the introduction roller 72 side to the transfer pad 84 side. The stretched state in the longitudinal direction of the surface liner 1a is relaxed or eliminated by the influence of a temporary free state when moving in the air. Further, the stretched state of the surface liner 1a in the short direction (width direction) is alleviated or eliminated by the influence of a temporary free state or the like when the surface liner 1a moves in the air from the introduction roller 72 side to the transfer pad 84 side. It has come to be. Therefore, it is possible to set the moving speed V4 of the surface liner 1a when applying the surface liner 1a to the first continuous body 61 in accordance with the transport speed V5 of the first continuous body. The surface liner 1a can be stably applied to the first continuous body 61 while preventing the above.

  In particular, in the present embodiment, the movement speed of the transfer pad 84 is periodically changed according to the position on the trajectory C1. Therefore, by utilizing the change in the moving speed of the transfer pad 84, the transport speed V5 of the first continuous body 61 and the transport speed V1 of the second continuous body 62 are independently set to optimum values. On the other hand, an effective speed difference between the introduction roller 72 side and the transfer pad 84 side necessary for contracting the surface liner 1a during delivery of the surface liner 1a can be generated.

  Moreover, according to this embodiment, since the surface liner 1a is provided to the first continuous body 61 with a space in the longitudinal direction of the first continuous body 61, the surface liner 1a is attached to the first continuous body 61. This is convenient when it is only necessary to apply it in a partial section in the longitudinal direction of the (main body 9).

  In particular, in the present embodiment, the above-described re-pitch function by the transfer pad 84 of the relay drum 74 optimizes the interval along the longitudinal direction between the surface liners 1a when the surface liner 1a is applied to the first continuous body 61. Can be set to a value.

  Further, according to the present embodiment, as described above, the surface liner 1a in which the stretched state is relaxed or eliminated is applied to and bonded to the first continuous body 61 to which the hot melt adhesive 86 is applied. Therefore, the surface liner 1a can be joined to the first continuous body 61 while maintaining the flexibility and the like of the surface liner 1a.

  Further, according to the present embodiment, the second continuous body 62 manufactured in a state where the thread-like elastic members 41 and 42 are extended is introduced into the junction B with the first continuous body 61 while being extended. Since the second continuous body 62 can be applied to the first continuous body 61 while being relaxed or eliminated by cutting the second continuous body 62 to a predetermined length, an efficient production line can be configured.

[Second Embodiment]
FIG. 9 is a diagram schematically showing a configuration of a disposable absorbent article manufacturing apparatus according to the second embodiment of the present invention. The manufacturing apparatus 50 a according to this embodiment is substantially different from the manufacturing apparatus 50 according to the first embodiment described above in that the second continuous body 62 introduced into the introduction roller 72 is replaced by the introduction roller 72. The points assigned to 61 and the related parts are attached to the parts corresponding to each other to avoid duplicating description. That is, here, only the points where the manufacturing apparatus 50a according to the present embodiment is substantially different from the manufacturing apparatus 50 according to the first embodiment will be described.

  In the manufacturing apparatus 50a according to this embodiment, as shown in FIG. 9, among the components of the merging and forming mechanism 55 according to the first embodiment described above, the cutting portion 73 and the relay drum 74 are omitted, and the introduction roller 72 is It is arranged to face the backup roller 75. For this reason, after the second continuous body 62 introduced into the junction B by the second transport mechanism 54 is received so as to be wound around the introduction roller 72, the second continuous body 62 is transferred to the first continuous body 61 by the introduction roller 72. It is given and joined.

  More specifically, in the present embodiment, in the merging step S5, the conveyance speed V5 when the first continuum 61 passes through the merging portion B is the same as when the second continuum 61 is introduced into the merging portion B. The speed is set lower than the transport speed V1. Then, using the difference in speed between the second continuum 62 and the first continuum 61 when the second continuum 62 is joined to the first continuum 61, the second continuum 62 is relaxed or eliminated while the extension state of the second continuum 62 is relaxed or eliminated. The two continuums 62 are applied to the first continuum 61 for bonding. The moving speed V11 of the outer peripheral portion of the introduction roller 72 is set to be equal to the transport speed V1 of the second continuous body 62.

  For this reason, according to the present embodiment, substantially the same effects as those of the first embodiment can be obtained for portions having the same configuration as that of the first embodiment, and the following effects can be obtained by the unique configuration according to the present embodiment. . That is, in the present embodiment, the extension state of the second continuous body 62 is relaxed by utilizing the speed difference between the second continuous body 62 and the first continuous body 61 when the second continuous body 62 joins and is applied to the first continuous body 61. Alternatively, since the second continuous body 62 is applied to and joined to the first continuous body 61 while being eliminated, the relay drum 74 and the like can be omitted, and the apparatus configuration can be simplified.

[Modifications, etc.]
Below, the modification regarding the manufacturing process which concerns on each above-mentioned embodiment, and the absorbent article manufactured by a manufacturing process is demonstrated.

  In each of the above-described embodiments, the second continuous body 62 continuously fed out from the surface liner preparation section 52 is continuously introduced into the merge section B. However, the second continuous body prepared in advance on a separate line is used. You may make it introduce | transduce into the confluence | merging part B, pulling out the 2nd continuous body 62 from the roll body around which the body 62 was wound. Even in this case, the second continuous body 62 having stretchability was stretched by applying a predetermined tension in a certain longitudinal direction and width direction so as not to cause undesired or slack or wrinkles in the transport process. It is conveyed in a state and introduced into the junction B. Therefore, the configuration according to each of the above-described embodiments (the configuration in which the second continuous body 62 is applied to the first continuous body 61 while relaxing or eliminating the stretched state) is a curl of the absorbent article 10a that is a finished product. It is effective in preventing

  Moreover, as a modification about the absorbent article 10a manufactured by the manufacturing process which concerns on each above-mentioned embodiment, the following are mentioned, for example. In addition, not only the structure taken up in this specification but the absorptivity which has the structure which provided the 2nd sheet member which has a contractibility and was produced in the stretched state to the non-stretchable 1st sheet member If it is an article | item, the manufacturing process which concerns on each above-mentioned embodiment is applicable about arbitrary structures.

  10 is a plan view showing a contracted state in another configuration example of the surface liner 1a provided in the absorbent article 10a of FIG. 1, and FIGS. 11 and 12 are an expanded state and a contracted state along the line A3-A3. FIG.

  10 to 12, the excrement receptacle 20 of the surface liner 1b has a substantially rectangular outer shape, and two non-woven fabrics 151 and 152 as non-stretchable members bonded to each other. The plurality of thread-like elastic members 146 and 147 are arranged in a lattice pattern between the nonwoven fabrics 151 and 152 and sandwiched in an expanded state.

  The plurality of thread-like elastic members 146 extend substantially parallel along the short direction, and the plurality of thread-like elastic members 147 extend substantially parallel to the longitudinal direction. Thereby, the plurality of thread-like elastic members 146 and the plurality of thread-like elastic members 147 are arranged substantially orthogonally, and a rectangular region surrounded by the thread-like elastic members 146 and 147 is formed on the entire main surface of the excretion receptacle 20. It is formed approximately periodically. Each rectangular region has a substantially circular through-hole (opening through from one main surface to the other main surface) 192. Therefore, also in this configuration example, a large number of through-holes 192 are dispersed and formed on the entire main surface substantially periodically with respect to each of the longitudinal direction and the lateral direction.

  As a material for the nonwoven fabrics 151 and 152, the liquid-permeable nonwoven fabric as described above is employed in order to increase the excretion absorption efficiency. Moreover, as a raw material of the thread-like elastic members 146 and 147, an elastic stretchable material used for general absorbent articles such as polyurethane thread and natural rubber can be used.

  10 and 11 show a state where the thread-like elastic members 146 and 147 are stretched to some extent for convenience of explanation. When the thread-like elastic members 146 and 147 contract, the excretion receptacle 20 contracts both in the longitudinal direction and in the lateral direction, and a large number of irregular slacks or wrinkles are formed on the main surface. Thereby, as shown in FIG. 12 which is a cross-sectional view at the same position as FIG. 11, an irregular uneven distribution is given to the entire main surface of the excretion receptacle 20.

  With such a configuration, even when this surface liner 1b is used in the above-described absorbent article 10a, it is possible to effectively prevent the excretion of the excrement including liquid components such as loose stool and solid components.

  FIG. 13 is a plan view of an absorbent article which is another application example of the manufacturing process according to each of the above-described embodiments, and FIG. 14 is a plan view of the surface liner provided in the absorbent article in a contracted state. 15A is a cross-sectional view taken along the line A4-A4 in FIG. 14, and FIG. 15B is a cross-sectional view taken along the line A5-A5 in FIG.

  As shown in FIGS. 13 and 14, the surface liner 1c used in the absorbent article 10b of FIG. 13 has a substantially rectangular outer shape, and two non-woven fabrics 112 as non-stretchable members bonded to each other. , 113 and a plurality of thread-like elastic members 111 arranged in a distributed manner between the nonwoven fabrics 112, 113 and sandwiched in an expanded state. When viewed from the skin surface side, the thread-like elastic member 111 is hidden behind the nonwoven fabric 112, but the thread-like elastic member 111 is represented by a solid line in FIGS. 13 and 14 for easy viewing.

  The thread-like elastic member 111 is disposed in about 60% of the rear portion of the surface liner 1c, and is not disposed in the other portion (front side) of the surface liner 1c. The arrangement position of the thread-like elastic member 111 is set so as to correspond around the wearer's buttocks.

  Further, each thread-like elastic member 111 meanders in a substantially sine curve shape, is shifted by a half wavelength from the next thread-like elastic member 111, and the adjacent thread-like elastic member 111 overlaps (or comes into contact with) adjacent parts, or Arranged so that there is a small gap). For this reason, a plurality of small enclosed regions Sa are formed by the peaks and valleys of the thread-like elastic member 111 (see FIG. 14).

  It is recommended that the meandering width W of the thread-like elastic member 111 is, for example, about 5 to about 200 mm, and the period T is about 10 to about 300 mm. In addition, the expansion ratio of the thread-like elastic member 111 when bonded to the nonwoven fabrics 112 and 113 is desirably about 1.5 to about 5.0 times.

  Thus, when the thread-like elastic member 111 contracts, the stretched state shifts to a state in which the nonwoven fabrics 112 and 113 shown in FIG. 15B are moderately slackened or wrinkled, and the longitudinal direction of the surface liner 1c In addition, a large number of mountain valleys are scattered in the short direction.

  The portion of the surface liner 1c where the thread-like elastic member 111 is not disposed is kept flat without being substantially affected by the shrinkage of the thread-like elastic member 111 as shown in FIG. For this reason, it can prevent that the uneven | corrugated | grooved part of the surface liner 1c contacts a wearer's abdominal part, and a mounting feeling is impaired by a gore.

  Also in the absorbent article 10b having such a configuration, it is possible to effectively prevent the diffusion of excreta including liquid components such as loose stool and solid components.

It is a top view of the disposable absorbent article which is one application example of the manufacturing apparatus of the disposable absorbent article which concerns on 1st Embodiment of this invention. It is sectional drawing along the A1-A1 line of FIG. It is a top view in the contracted state of the surface liner with which the disposable absorbent article of FIG. 1 is equipped. It is sectional drawing along the A2-A2 line of FIG. It is explanatory drawing of the manufacturing process by the manufacturing apparatus of the disposable absorbent article which concerns on 1st Embodiment of this invention. It is a figure which shows typically the structure of the manufacturing apparatus of the disposable absorbent article which concerns on 1st Embodiment of this invention. It is a figure which expands and shows a part of apparatus structure of FIG. (A) And (b) is sectional drawing and the side view which show the structure of the relay drum with which the structure of FIG. 7 is provided somewhat simplified. It is a figure which shows typically the structure of the manufacturing apparatus of the disposable absorbent article which concerns on 2nd Embodiment of this invention. It is a top view which shows the contraction state in the other structural example of the surface liner with which the disposable absorbent article of FIG. 1 is equipped. It is sectional drawing which shows the expansion | extension state along the A3-A3 line | wire of FIG. It is sectional drawing which shows the contraction state along the A3-A3 line of FIG. It is a top view of the disposable absorbent article which is another application example. It is a top view in the contracted state of the surface liner with which the disposable absorbent article of FIG. 13 is equipped. (A) is sectional drawing along the A4-A4 line of FIG. 14, (b) is sectional drawing along the A5-A5 line of FIG.

Explanation of symbols

  1a, 1b, 1c Surface liner, 2 Short tape member, 3 Long tape member, 10a, 10b Absorbent article, 11 Top sheet, 12 Side sheet, 13 Back sheet, 14 Absorber, 15 Rubber thread, 20 Excretion Object receiver, 21, 22, 31, 32 Tape-like non-woven fabric, 41, 42 Threaded elastic member, 50, 50a Manufacturing device, 51 Main body preparation section, 52 Surface liner preparation section, 53 First transport mechanism, 54 Second transport mechanism , 55 Merge forming mechanism, 56 Adhesive application part, 57 Cutting mechanism, 61 First continuous body, 62 Second continuous body, 71 Width adjusting part, 72 Introduction roller, 73 Cutting part, 74 Relay drum, 75 Backup roller , 81 Support, 82 Drive pulley, 83 Drive link, 84 Transfer pad, 85 link, 86 Hot melt adhesive, 91 through , 111 thread-shaped elastic members, 112 and 113 non-woven, 146, 147 thread-shaped elastic members, 151 and 152 non-woven, B merging section.

Claims (9)

An apparatus for producing a disposable absorbent article comprising a first sheet member joined together, and a second sheet member having elasticity,
A first transport mechanism that passes a first continuous body in which the first sheet members are continuously connected to a predetermined junction;
A second transport mechanism that feeds the second continuous body, in which the second sheet members are continuously connected, to the merging portion in a state of extending at least in the longitudinal direction;
At the merging portion, the furuncle one shrink by cutting every second of the continuum a predetermined length, a merging forming mechanism to be applied to said first continuous body,
Equipped with a,
The merge formation mechanism is
The second continuum introduced by the second transport mechanism while rotating at a rotational speed corresponding to the first transport speed when the second continuum is introduced into the merge portion. An introduction roller received at the outer periphery,
A cutting section that cuts the second continuous body received by the introduction roller for each predetermined length;
The outer peripheral portion is disposed to face the outer peripheral portion of the introduction roller, and the second continuous body cut at the predetermined length at the outer peripheral portion is rotated while rotating in the direction opposite to the introduction roller. A relay drum that receives from the roller and applies the received second continuum to the first continuum;
With
The relay drum is
A plurality of transfers that receive the second continuous body that is moved along a circular path and cut to the predetermined length from the introduction roller, and that applies the received second continuous body to the first continuous body. With a pad,
The relay drum applies the second continuous body cut to the predetermined length to the first continuous body with an interval in the longitudinal direction of the first continuous body,
The apparatus for manufacturing a disposable absorbent article , wherein an interval between the transfer pads along the orbit is periodically changed depending on a position of the transfer pad on the orbit . In the manufacturing apparatus of the disposable absorbent article according to claim 1 ,
A disposable absorbent article, wherein a moving speed of the outer peripheral portion when the outer peripheral portion of the relay drum receives the second continuous body is set to be lower than the first conveying speed. Manufacturing equipment. In the manufacturing apparatus of the disposable absorbent article according to claim 2 ,
The moving speed when the second continuum of the transfer pad is received from the introduction roller is different from the moving speed when the second continuum is applied to the first continuum. Equipment for manufacturing disposable absorbent articles. An apparatus for manufacturing a disposable absorbent article comprising a first sheet member joined to each other and a second sheet member having elasticity,
A first transport mechanism that passes a first continuous body in which the first sheet members are continuously connected to a predetermined junction;
A second transport mechanism that feeds the second continuous body, in which the second sheet members are continuously connected, to the merging portion in a state of extending at least in the longitudinal direction;
In the merging portion, the second continuum is contracted while being in a continuous state, and a merging formation mechanism that is applied to the first continuum;
With
The merge formation mechanism is
While rotating at a rotational speed corresponding to the transport speed when the second continuum is introduced into the junction, the second continuum introduced by the second transport mechanism is An introduction roller for receiving and applying the received second continuum to the first continuum;
The apparatus for manufacturing a disposable absorbent article, wherein the transport speed of the first continuous body is set to be lower than the transport speed when the second continuous body is introduced into the introduction roller . In the manufacturing apparatus of the disposable absorbent article according to any one of claims 1 to 4 ,
The second sheet member includes an elastic member and a non-stretchable member joined to the elastic member in a state in which the elastic member is stretched, and the non-stretchable property generated as the elastic member contracts An apparatus for producing a disposable absorbent article, wherein the uneven distribution is generated by slack or wrinkles of members . In the manufacturing apparatus of the disposable absorbent article according to claim 5 ,
The said 1st sheet | seat member is equipped with the absorber which absorbs the excrement which penetrates via the said 2nd sheet | seat member, The manufacturing apparatus of the disposable absorbent article characterized by the above-mentioned. An apparatus for manufacturing a disposable absorbent article comprising a first sheet member joined to each other and a second sheet member having elasticity,
A first transport mechanism that passes a first continuous body in which the first sheet members are continuously connected to a predetermined junction;
A second transport mechanism that feeds the second continuous body, in which the second sheet members are continuously connected, to the merging portion in a state of extending at least in the longitudinal direction;
In the merging portion, a merging formation mechanism that applies the first continuum while cutting and contracting the second continuum for each predetermined length;
With
The second sheet member includes an elastic member and a non-stretchable member joined to the elastic member in a state in which the elastic member is stretched, and the non-stretchable property generated as the elastic member contracts An apparatus for producing a disposable absorbent article, wherein the uneven distribution is generated by slack or wrinkles of members . In the manufacturing apparatus of the disposable absorbent article according to claim 7 ,
The said 1st sheet | seat member is equipped with the absorber which absorbs the excrement which penetrates via the said 2nd sheet | seat member, The manufacturing apparatus of the disposable absorbent article characterized by the above-mentioned. In the manufacturing apparatus of the disposable absorbent article according to any one of claims 1 to 8 ,
In order to join both continuous bodies to at least a part of a portion of the first continuous body to which the second continuous body is provided, which is provided on the upstream side in the transport direction of the first continuous body of the merging portion. The manufacturing apparatus of the disposable absorbent article further provided with the adhesive provision part which provides the adhesive agent of this .

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