DE2618350A1 - TAMPON FOR WOMEN HYGIENE - Google Patents

Description

Bi 328a, b / 75 April 26, 1976

Applicant:

"Tampon for feminine hygiene"

The invention relates to a tampon for feminine hygiene, which consists of a tampon provided with a withdrawal thread and subsequently wound and pressed fiber fleece, e.g. a wadding fleece.

A well-known tampon of this type (according to DT-OS 1 491 162) has a return thread that is approximately the The middle of the fiber fleece encompasses its two narrow sides and that by knotting it over one side edge of the fleece protruding ends forms a loop. This knotting of the thread ends had become absolutely necessary, according to experience on tampons with untied thread ends showed that a thread grasped at only one end then inevitably with his other end from which the liquid absorbed and thus swollen tampon exchanged ^ ^ g

Bi 328a, b / 75 - ^ - April 26, 1976

With this return thread knotted into a loop at its ends is a pulling out of the tampon after its intended use en use is guaranteed, but the dreaded spiraling or - around it cannot in every case more vividly characterize - telescoping of the tampon while pulling it out can be prevented. One understands under "telescoping" the change in shape of a tampon, which the tampon causes after its swelling due to tensile forces along its longitudinal axis under the associated increase in length when pulling out by means of the retrieval thread.

For a better understanding of this undesirable effect, two aspects are essential:

On the one hand, the sticking of the retrieval thread in the pressed, unused tampon is completely irrelevant for its intended use Use. This only starts when the tampon has absorbed the menstrual fluid and thus a Has experienced swelling. In this phase, the tampon with the retrieval thread must, if possible, change its shape without causing contamination as well as can be completely removed.

On the other hand, there is the ratio of the frictional forces during the pull-out process essential. Then the frictional forces between the outer peripheral surface of the tampon and the vagina wall are greater than the frictional forces between the circumferential surfaces of the inner fleece

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turns of the swollen tampon, so is usually a Telescoping inevitable.

This disadvantage has obviously been recognized and proposed (according to DT-AS 2 240 753) to roll up the tampon blank of the fleece strip to form at least from its two ends in the direction of its longitudinal center, the direction of rotation of Winding direction for the two ends of the fleece strip should optionally be opposite or in the same direction. The production Such a tampon, insofar as such a tampon can be produced in an economically justifiable extent, is hardly effective manufacturing problems to be solved. This causes excessive calendering of the to be wound between the At the ends of the non-woven part a tearing and a too weak calendering a different blank shape, which at handover of the tampon to the press leads to malfunctions. In addition, in addition to the obligatory loop formation, the both free ends of the retrieval thread are knotted together, since when only one thread end is detected, the other thread end cannot be prevented in every case.

Finally, apart from other difficulties, the manufacture of such a tampon is like that of a tampon according to the aforementioned DT-OS 1 491 162 only in an intermittent manner because of the thread ends to be knotted or entwined

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and not possible in a continuous manufacturing operation.

Proceeding from this, the invention is based on the object of creating a tampon of the type mentioned at the outset, in which a Telescoping can only occur up to about the length of the last fleece turn without any knot formation a protruding thread end ensures complete removal and that with simple means its production in a continuous Manufacturing operation guaranteed.

According to the invention, this object is achieved in that the withdrawal thread is arranged over most of the total length of the fiber fleece in its longitudinal direction on or under it, whereas another part of the return thread is approximately at right angles to the longitudinal direction of the fiber fleece beyond its longitudinal edge is bent to wind up the fiber fleece from the end facing away from the bent end of the return thread and then the bent The end of the return thread is to be pulled approximately through the middle of the winding blank. This creates a tampon, the withdrawal thread part of which despite opposing concerns of the average person skilled in the art, not only cannot rustle out, but through the the swollen tampon, moreover, during the withdrawal process, depending on the tensile and frictional forces that then occur experiences a constriction that favors its removal. Telescoping or unwinding of the fleece is just a matter of course

Bi 328a, b / 75 - ^ - April 26, 1976

f 26183S0

possible up to the point at which the return thread is bent and pulled through the center of the winding blank. Practically the return thread could also wrap around the fleece completely, so that telescoping would be completely impossible however, there is the risk that the return thread part then lying on the outside will be damaged by the press jaws in the subsequent pressing process could. For this reason, the return thread part located in the vicinity of this point is advantageous from the last outside the end of the fleece to be wound overlaps.

And finally, there is also a simple and cost-saving production this tampon ensured in a continuous operation, since neither to fix the thread on the fleece part gluing, needling or other tacking is required. Electrostatic fixation proves advantageous in such a way that that the return thread before its feed onto the wadding with an electrostatic that differs from that of the nonwoven Potential is provided and, due to the resulting forces, is closely linked to the fibers of the fleece.

According to an advantageous feature of the invention, the withdrawal thread before the winding process between two separate, parallel to each other arranged nonwovens, whereby on the one hand the thread is fixed directly by the two fleece layers and, on the other hand, the fleece length is kept relatively short

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can. It is also possible to make one of the two fiber fleeces a little narrower than the other, whereby the specifically lower end of the winding blank is assigned to the introducer. In this way, not only a dome is formed facilitated, but also at this end a greater suction speed of the tampon achieved during its swelling phase.

In order to provide the retrieval thread with a loop that makes it easier to handle without knot formation, the retrieval thread is used placed twice on or under the respective fiber fleece, the end having the loop being bent and roughly through the middle of the blank is to be pulled.

A particularly advantageous embodiment of the new tampon is produced in that the withdrawal thread with the largest Part of its length is arranged parallel and in the vicinity of that side edge of the fiber fleece, which is wound in State forms the pull-out end of the finished tampon. In this way, the tampon experiences directly proportional to the size of the opposing Forces during the pull-out phase a constriction at its pull-out end, giving the tampon a cone-like shape Takes shape, which in particular reduces the risk of telescoping and favors its removal.

Several embodiments of the new tampon are based on

Bi 328a, b / 75 - ^ - April 26, 1976

A ₀ 26183150

Drawings described below. Show:

Fig. 1: A fiber fleece with a centrally placed over almost its entire length retrieval thread with a bent Part of the thread in perspective view,

Fig. 2: the fiber fleece and the retrieval thread from Fig. 1 in

almost wound up with the return thread end pulled through in the middle,

3: the finished tampon blank according to FIGS. 1 and 2,

4: the perspective view from below of a fiber fleece with a center over almost its entire length Return thread arranged below it with a return thread part bent over one longitudinal edge,

FIG. 5: the fiber fleece and the retrieval thread from FIG. 4 in an almost wound-up manufacturing phase after pulling through of the return thread end,

6: the finished tampon blank according to FIGS. 4 and 5,

Fig. 7: a fiber fleece with a centrally placed double thread,

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Fig. 8: the parts of Fig. 7 in an almost rolled-up manufacturing phase,

9: the finished tampon blank according to FIGS. 7 and 8 with the loop hanging out,

10: a return thread arranged centrally between two separate fiber fleeces,

11: the two nonwovens and the retrieval thread from FIG. 10 in an almost wound manufacturing phase,

12: the finished tampon blank according to FIGS. 10 and 11,

13: Two fiber fleeces of different widths with eccentric between them in the vicinity of that side edge arranged return thread, which in the wound state, the extraction end of the finished Tampons forms,

14: the nonwovens and the retrieval thread from FIG. In an almost wound manufacturing phase,

FIG. 15: the finished tamppnrdhling according to FIG. 13

ORIGINAL INSPECTED

Bi 328a, b / 75. /. ' ₂ fa. April 1976

and 14,

16: a fiber fleece with a retrieval thread placed eccentrically near that side edge, which, when rolled up, forms the pull-out end of the finished tampon,

FIG. 17: the fiber fleece and the retrieval thread from FIG. 16 in an almost wound production phase,

18: the finished tampon blank according to FIGS. 16 and 17,

19: a tampon according to FIG. 18 after its use during removal, contrary to the corresponding one Tensile and frictional forces and their resulting change in shape,

20 shows a tampon produced according to FIGS. 1 to 3 after its intended use telescoped and folded outer circumferential coil, and

21 shows a tampon produced according to FIGS. 16 to 18 after its intended use

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slightly folded outer circumferential coil.

In FIGS. 1 to 3, a return thread 2 is arranged centrally on a fiber fleece 1. The return thread 2 runs with its largest thread part 2 'approximately parallel to the side edges I ^{1 of} the fiber fleece 1. It is advantageous - although more difficult from a manufacturing point of view - to place it with its part 2', for example in serpentine lines, on the fiber fleece 1, because thereby its effective wrapping length and the frictional forces between the return thread 2 and the nonwoven fabric 1 can be increased. In the vicinity of the end 1 ″ of the fiber fleece 1, the return thread 2 is bent with a further part 2 ″ approximately at right angles to its part 2 ′ and protrudes with its extension end 2 ¹ ″ over one of the side edges 1 ′ of the fiber fleece 1. From the end 1 ^MI , the fiber fleece 1 is wound up in the direction of arrow A. As soon as the winding has approximately exceeded the production phase in FIG. In this case, the bent thread part 2 ″ is advantageously overlapped by the end 1 ″ of the fiber fleece and thus covered. The result is the finished winding blank according to Fig. 3. In this way, the bent thread end 2 ″ is protected from possible damage by the pressing jaws of the tampon blank press, which then press the tampon blank to its final form ready for use.

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Bi 328a, b / 75 - yes - April 26, 1976

If, due to the special design of the press jaws, there is no fear of damage to an exposed return tape 2, the embodiment of the new tampon according to FIGS. 4 to 6 is recommended, in which corresponding parts are provided with corresponding reference numbers. In this case, the return thread 2 is arranged with its thread part 2 'over most of the total length of the fiber fleece 1 in its longitudinal direction below this 1 and otherwise ^{bent according to the arrangement of FIG. 1 with its thread parts 2 "and 2 1} ". In this case, when the thread 2 is wound in the direction of arrow A, it reaches the outer circumference of the winding blank 3, whereby the fiber fleece 1 including its end 1 "is wrapped in a packet-like manner and spiraling can no longer occur, as is most clearly shown in FIG. 6 In FIG. 6, the dotted lines 2 also ^{indicate the constriction of the tampon when tensile forces are exerted on the end 2 1} ″ of the retrieval thread.

In FIGS. 7 to 9, a double thread 12 is now placed on the fiber fleece 1 in accordance with the arrangement of FIGS. 1 to 3, the free thread ends 12 of which ^{are assigned to the end I 1} "of the fiber fleece 1. which is drawn ^{through the center 3 1} of the winding blank 3 shortly after the winding phase of FIG. The result is the winding blank 3 of FIG. 9 with a, a closed so-

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Bi 328a, b / 75 - ^ - April 26, 1976

like pull-out ends 12 ¹ "with knotless loops. In addition to the advantages mentioned above and easier handling of the tampon while it is being removed, this also has the advantage that even if the loop 12 '" is torn, the tampon 3 can still be pulled by one of its two loose pullers can be safely pulled out and a ruffling of the withdrawal thread 2 is still just as impossible as in the embodiment of FIGS. 1 to 3.

In FIGS. 10 to 12, the return thread 2 is arranged between two nonwovens 1, 11, the winding here as well in the direction of arrow A from the end 1 ′ ″ of the fiber fleece 1 begins. In the present case, the fleece 11 lying on top is just as long and as wide as the fleece 1 below.

In the case of FIGS. 13 to 15, however, the overlying fleece 11 is narrower on one side than the underlying fleece 1. The latter leads to the tampon blank 3 having a fleece structure of lower density per unit length at its end 3 ″. This lower fleece density causes the tampon to swell more quickly at the insertion end 3 ″ and thus a greater suction speed for receiving the periodically expelled menstrual fluid. And finally it will be this way also a dome formation at the end 3 ″ of the tampon blank 3 favors.

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A particularly advantageous embodiment of the new tampon is shown in FIGS. Here, too, as in the embodiment according to FIGS. 1 to 3, the return thread 2 is arranged on the wadding fleece 1, but in contrast to this not in the middle, but in the vicinity of that side edge l ^{f of} the fiber fleece 1, which in the wound state ( 17 and 18) forms the pull-out end 3 ¹ "of the finished tampon. If the end 2 '" of the retrieval thread 2 is now pulled after the intended use of the tampon, the pull-out end 3'"of the tampon 3 becomes dependent on the existing tensile and frictional forces cone-like - as shown in Fig. 19 - tied ^{together at this front end 3 IU} , which considerably facilitates its removal due to this change in shape 2 ^{1 arranged} eccentrically between the fleeces 1 and 11.

It goes without saying that within the scope of the inventive concept, various Modifications and combinations of the execution forms shown are possible. For example, it is particularly advantageous in the embodiments of Figures 4 to 6 and the Figures 10 to 18 each use the double thread 12 shown in Figures 7 to 9.

In Figure 20 is a according to the embodiment of Figures 1 to

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Bi 328a, b / 75 - j ** - ₂ 6 _O April 1976

manufactured tampon according to its intended use as well shown in its worst possible position. How nevertheless

IV clearly emerges from this, only the last turn 3 of the tampon 3 can spiral up to the turn-over of the thread part 2 ″ or fold down, whereas any further telescoping is inevitably prevented by the return thread part 2 ″.

In FIG. 21, a tampon produced according to the embodiment of FIGS. 16 to 18 is shown after its intended use with the outer circumferential turn 3 folded away. In this embodiment, the thread part 2 ″ is arranged in the vicinity of the pull-out end 3 ^MI of the winding blank 3, can only

IV
Fold down part of the outer circumferential turn 3, the lower

IV
than the part 3 of FIG.

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Claims (7)

Bi 328a, b / 75 -] rfK- April 26, 1976 Claims Tampon for feminine hygiene, which consists of a nonwoven fabric provided with a retrieval thread and then wound and pressed, for example a wadding, characterized in that the retrieval thread (2) extends on or over most of the total length of the nonwoven fabric (1) in its longitudinal direction is arranged under this (1), whereas another part (2 ") of the return thread (2) is bent approximately at right angles to the longitudinal direction of the fiber fleece (1) over one longitudinal edge (I ¹ ), the fiber fleece (1) from the dem Wind up the bent end (2 ¹¹ ) of the return thread (2) facing away from the end and then pull the bent return thread end (2 ", 2 '") approximately through the center (3 ¹ ) of the winding blank (3) is ₀ 7098U / 0496 - 16 - Bi 328a, b / 75 - tf - ₂ April 6, 1976 1 26183E0 2. Tampon according to claim 1, characterized in that the return thread (2) before the winding process is arranged between two separate fiber fleeces (1, 11) running parallel to one another. 3. Tampon according to claim 2, characterized in that one (11) of the nonwovens (1, 11) a little narrower than the other (1). 4. Tampon according to claims 1 to 3, characterized in that the return thread (12) is laid twice on or under the respective nonwoven fabric (1), the end (12 ") having the loop (12 '") being bent and approximately is to be pulled through the middle (3 ¹ ) of the blank (3). 5. Tampon according to claims 1 to 4, characterized in that the withdrawal thread (2) with the largest part (2 ¹ ) of its length is arranged parallel and in the vicinity of that side edge (I ¹ ) of the nonwoven fabric (l) which in In the wound state, the pull-out end (3 ^MI ) of the tampon blank (3) forms. 7098U / tU9B - 17 - ORIGINAL INSPECTED Bi 328a, b / 75 - Jf - _{April 26} 6 "Tampon according to claims 1 to 5, characterized that the return thread (2) before its arrangement on or under the respective fiber fleece (1 or 11) is provided with an electrostatic potential that differs from that of the nonwoven fabric (1 or 11). 7. Tampon according to claims 1 to 6, characterized in that the last one to be wound up outside Fleece end (1 ") overlaps the retrieval thread (2", 12 ") located near this point. 7098U / <M8ß