DE2238526A1 - Catamenial tampon - made of expanded viscose rayon fibres for better absorption and retention - Google Patents

Abstract

A catamenial tampon is produced from a multitude of threads made of a cellulose material (viscose rayon, nitro-cellulose, acetate, ethyl cellulose rayon or cuprammonium) most of which have been expanded to contain cavities. Such a tampon expands both longitudinally and transversely when exposed to catamenia; particles of larger size which are not retained by the cavities are retained by the random interstices between the threads.

Description

Absorbent products for absorbing body fluids.

The invention relates to absorbent products for absorbing Body fluids, and particularly tampons, which are fibers or threads with cavities or enclosed gas areas.

Absorbent products for absorbing body fluids, in particular products that are inserted into the body cavities during use must have certain desirable properties because of their intended use own. As the main function of the final product is the absorption of body fluids is, the main property is any fiber, thread or material used its ability to moisture to absorb and hold back.

Due to the fact that the end product, e.g. a tampon insert a tooth insert, can be used in an area with very limited dimensions other properties of the product are highly desirable.

Especially with tampons, the material used must be in a certain Shape be malleable to allow convenient insertion into the vaginal opening. The fibers or threads that make up the tampon must be sufficiently undamaged to so that their breakthrough in the body is prevented when they are released from the body fluid are exposed. Next, the tampon must have sufficient elasticity to avoid that the absorbed liquid during use by body pressure is squeezed out of the tampon. At the same time, the tampon must expand or can inflate so that it can adapt to the size of the vaginal opening itself, in order to avoid leakage of the primary fluid, and preferably the Tampon not only puff up in a sideways direction, but should'-t 'itself too stretch lengthways.

With the greater spread of tampons in stores in recent times Numerous attempts have been made over the years to create a product which. Has as many of the above properties as possible and also economically in Can be mass produced. The initial attempts, the ability to absorb to increase were generally due to an increase in the pack of the material used directed. The existing restriction on the size of the tampons was an increase the packing of the material necessary associated with efforts, rflhr; ! 4material compress into a product of a given size. Even if such efforts Successful up to a point has a clenching over one certain; sweet many undesirable consequences. Too much compression reduces or to some extent destroys the elasticity of the ones used Fibers or threads and affects the expansion and puffing properties of the final product disadvantageous. The compression also provides a tighter assembly of fibers or threads, creating the spaces or open areas between the fibers or threads in which blood or the like is otherwise retained can be. Therefore, above a certain limit, a pack with a higher concentration or density of the material actually increases the absorbency adversely affect.

Other efforts to improve the overall properties of Tampons involved the use of different fiber materials, if more Absorbent properties were desired again in earlier attempts returned to denser packs under pressure and the problems recurred. a greater density of the fibers with the consequent difficulties.

Although these problems have long been known, the majority of them are so far used, commercially available tampon products either made of cotton or made from viscose rayon with a relatively fine denier, and in some cases from a mixture Constructed of either cotton or viscose rayon tifit cellulose crepe.

According to the invention it has been found that various materials, and in particular cellulose-based materials that are modified in such a way that that they provide lower specific gravity, not just greater absorbency but also have improved inflation and expansion properties, when used in a tampon.

In particular, it has been found that puffed cellulosic materials, when they are used as a material component in a product for absorbing body fluids are used, significantly improve the overall properties of the product.

It has long been known that polynosic fibers such as regenerated Cellulose and cellulose esters, can be puffed up.

E.g. in the production of rayon fibers and threads are different Techniques known to produce threads with voids in the thread walls. With some Techniques are numerous, longitudinally aligned voids in the thread arranged. With other techniques, they become flatter, transverse, somewhat regular aligned cavities formed.

In some cases, gaseous material remains in the bubble form Cavities are enclosed, and in other cases the gases are released, whereby they leave behind cavities that are open to the surrounding air, which they then replenishes.

Even if the techniques differ depending on the material you want can be such a puffing of the fibers for rayon, such as viscose rayon and collodion fibers (e.g. nitrocellulose), and for cellulose esters such as acetate, triacetate, Cuprammonium and ethyl cellulose rayon.

Even if great strides have been made in the field of fiber technology The basic technology has so far not been in any substantial way Extent applied to tampons or similar products.

In the field of cellulosic materials, it might appear have as if the first work with inflated "thread or threads on trials extended the look and feel of wool to such cellulosic materials give, i.e.

an otherwise heavy, transparent and cold-to-feel fiber to give it a light and fluffy texture. By placing cavities or gas pockets in The fiber was provided with flexibility and, to some extent, elasticity given.

The absorbent properties of the fibers were not essential considered, and indeed numerous professionals were working, obviously in an effort to improve wool, to a hydrophobic, puffed product out, and the improvements were generally on the look and feel as well directed the uniformity that could be given to such a fiber. The inflation properties were generally only taken into account to the extent that than they opted for upholstery, earthquake rescue equipment and sound-insulating materials suited.

Although recently the fact has been recognized that such threads or fibers have absorbent properties that are used for an end product the fiber was basically in a fabric or other end product that was constructed to maintain its desired shape, too when absorbency was desired. Even if it was therefore recognized that a inflated rayon or cellulose product in an absorbent end product has been the desirable property of the material for the Use as a tampon with this type of thread or fiber neither recognized nor used.

According to the invention, bloated measles and threads, and in particular Cellulosic fibers or filaments either as a main component or as an additional component Component in products for absorbing body fluids, in particular used in tampons, the product thus obtained in comparison to others absorbent materials suitable for use as a tampon have a high ratio from packing to low density shows. Even if the specific weight depends on the specific cellulose-based material used and the manufacturing process is different, the puffed cellulose material shows a significantly lower one Density than the commonly available fibers. E.g. for a base with 1.5 denier cotton a specific gravity of 1.50, rayon a specific Weight of 1.50 and wool a specific gravity of 1.28 while bloated Viscose rayon has a specific gravity of 0.60 to 1.20. This means that a puffed rayon with a given denier of 1.5 denier when it is up to the area of 0.60, a surface area twice that of a standard paleon has the same titer and also has an absorption capacity in the fibers, the absorption capacity by more than 100 compared to a standard rayon or Cotton enlarged.

It was also found that the puffed fibers or filaments have a significantly greater ability to expand in the transverse and longitudinal direction than usual viscous rayon fibers or the like with the same titer.

Even if there is no binding theory for how the When used in a tampon, the puffed up is believed to be viscous Rayon has better absorbent properties due to the fact that the hollow cellulose fibers or threads large amounts of water and various others Solutions and also a part of the serum of the menstrual blood can absorb due to the areas in the fibers that are osmotically or by capillary action the Liquids and serum attract and hold. Similarly, it appears as if the larger blood particles and components of the Mont's bleeding that are not in the cavities of the fibers can be absorbed more easily around the fibers and between them owing to the larger outer surface of the fibers or threads and adhere in the spaces between the fibers or threads.

As will be described in detail below, it has also been found that a combination comprising standard cellulosic (i.e. non-inflated) and expanded cellulose material used in a given ratio, better absorbent properties than the sum of the absorbent properties each component can be expected for itself. Even if again there is no binding Theory should be given for the mode of action, it seems as if the greater Affinity for liquid of the inflated material so interacts with the usual rayon, that this closer to its greatest possible absorption capacity approaches. aside from that the expansion observed in the puffed cellulosic material can have the effect have to increase the spacing of the standard viscose rayon fibers or threads, whereby created a larger exposed surface for the retention of the liquid will.

It was found that the absorbency and retention properties of the puffed cellulose material is so superior to that of conventional viscose rayon are that the cleaning step normally used in tampon manufacture when viscose rayon is a constituent material, if desired, is omitted can be, and a tampon is the result, the better absorption properties than a standard rayon tampon. The cleaning or rinsing is done in general on viscose rayon products to add certain finishing chemicals to remove, which are used in the production of viscose rayon. These chemicals generally have an adverse effect on the absorption capacity cleaning was done to remove these chemicals so that the Absorbency is increased.

Therefore, if inflated cellulosic material is used, can it is desirable for economy of manufacture - cleaning is omitted and a tampon made from such a material has a better one Absorbency is more than a tampon made from a conventional, cleaned viscose rayon.

Even if, as already mentioned, a lot of bloated materials cellulose-based, puffed viscose rayon is best suitable because it can be produced more economically than nitrocellulose and the cellulose esters previously described.

In the following, the invention is based on embodiments under To be further explained with reference to the accompanying drawing.

1A and 1B show a transverse and longitudinal section, respectively, of one form of the puffed viscose rayons as used according to the invention.

Figs. 2A and 2B show a transverse and longitudinal section, respectively, of another Form of a puffed rayon rayon thread.

Figs. 3A and DB show a transverse and longitudinal section, respectively, of another Embodiment of a thread according to the invention.

Figures 4A and 4B show a transverse and longitudinal section, respectively, of yet another Embodiment of a thread according to the invention.

Fig. 5 is a longitudinal section of the puffed viscose rayon thread of Figs Fig. 1B and shows gas bubbles trapped in the thread.

Fig. 6 shows a top view of one made in accordance with the invention Tampon.

Fig. 7 shows the tampon of Fig. 6 after having body fluids recorded.

Fig. 8 is a reproduction of a photomicrograph of a Shape of the puffed up viscose rayon threads when dry.

Fig. 9 is a reproduction of a photomicrograph showing shows the thread of Figure 8 after exposure to moisture.

Fig. 10 shows the reproduction of a photomicrograph of the threads after exposure to blood serum.

Figures 1A, 1B, 2A, 2B, 3A, 33, 4A, 43 and 5 illustrate different ones to shape of puffed viscose rayon. The differences between threads la, 2a and 3 are the result of variations in the manufacturing processes used.

Each of the threads shown shows a puffed viscose rayon thread; however, it should be noted that other filaments have a similar shape when inflated are.

The diameter of the threads varies, of course, depending on the Titer with which they are made and the uniformity of the puffing of the fibers or threads used.

In Figs. IA and 1B, the hollow areas 4 are due to the manufacturing process relatively long and extend for a considerable distance in the longitudinal direction the fiber or thread. For a simpler description, the thread of Fig. 1A and 13 are referred to as the severely bloated type, with "severely" referring to the Formation of the hollow areas 4 relates.

In Figs. 2A and 2B, the hollow areas 5 are larger in the transverse direction than lengthways, and because of their flat basic shape, they can be of simplicity are referred to as "weakly" inflated threads.

Of course, the 'strong "and" weak " inflated hollow areas 4 and 5 not the illustrated regular shape, and modifications in size and shape are common, as shown in FIGS. 3A, 33 and Figures 4A, 43 are shown where an irregular pattern of puffed areas is randomly distributed in the threads.

In Fig. 5, the thread 3 is of the "highly" inflated type, but they are contained in the hollow areas 4 bubbles 6 of enclosed, gaseous material.

Even if Fig. 5 shows the inclusion of gas bubbles in a "strongly" inflated Thread shows, of course, can do the same in the weakly inflated thread 2A, 2B or in the threads of FIGS. 3A, 3B or 4A, 4B.

The threads i, ia, 2,2a and 3 are generally produced in this way and treated so that they are made in the form of a spun strand. The strand is then cut to a certain length and carded. To roll up the cards To facilitate this, a surfactant is often applied to the strand.

If it has been carded or otherwise treated, it can the rayon as a material component in the manufacture of tampons, like the one in Fig. 6 shown tampon 7 can be used. The tampons can be of various types Manner using various manufacturing techniques.

For example, a tampon making machine can be used like them U.S. Patent 3,465,390.

As can be seen from the examples below, the usage improves of inflated material, the absorption capacity of a body fluid retentive Item greatly and further improves the overall desirable properties of such a product. As can be easily seen from the following examples, a given weight of the material has twice the surface area as the same weight of a non-inflated product of the same material and an additional absorption capacity in the fibers or threads.

This significant decrease in the specific weight can not only occur with Viscose rayon can be obtained, but also based on other materials of regenerated cellulose and other cellulose esters. It can also be different Titers can be used (in the following tests samples with 1.5 and 5.5 denier used), a titer suitable for the specific purpose being selected will. A tampon can develop e.g. a range of 1 denier up to 25 denier are suitable, although the higher titers are somewhat coarser. As far as the treatment of the raw material is considered, is also in use a relatively uniform inflation difficult with current techniques, and it is somewhat cumbersome to reach the range above about 20 denier.

In order to get concrete results, the puffed material was used used after it was molded in tampons, and the absorbency and others Results were determined in this state.

As can be seen from the following tables, tampons were manufactured where "weak" (L) and highly (lI) puffed viscose rayon using 1.5 denier and 5.5 denier samples were used.

For comparison purposes, a control tampon made from standard rayon was used was made with 3 denier, which has the weight given in the tables.

Absorbency was assessed using the Syngyna procedure tested. A summary of the Syngyna procedure is given in the treatise "A Comparison Of The Absorptive Efficienty Of The Commercial Catamenial Tampons", 1958, Department of Research, Loyola University, Chicago, Illinois, by G.W. Rapp.

The Syngyna procedure is basically based on being suitable for one applied tampon to apply an adjustment pressure of physiological size, uni then a liquid of suitable consistency at a set speed to flow on its upper end. The test is complete when the first Drops of fluid begin to fall from the open end of the syngyna " regardless of whether the tampon appears saturated or not.

In order to obtain more precise data, the following investigations were carried out Blood used as the fluid in the Syngyna test.

In the following Table I are the absorbencies of distended Viscose rayon fibers of 1.5 denier and 5.5 denier in both the "strong" and in the "weakly" inflated variants and in both the purified and unpurified Condition listed. A control sample of a tampon product is also included in the data made of standard 3 denier paleon.

In addition, a tampon is specified, which consists of an outer layer of 1.5 denier and an inner layer of 5.5 denier.

Table 1 Type tampon total absorption% over balance absorpt. me (g) control stretchability test 1.5 Denter (H-type) cleaned 3.09 '18.09 5.87 +31 15/16 "not cleaned 2.96 18.68 6.31 + 41% 1 1.5 Denter (L-type) cleaned 3.00 18.31 6.10 + 37% 15/16 "not cleaned 3.14 19.21 6.12 + 37% 1" 5.5 Denter (H-type) cleaned 3.05 19.52 6.40 + 44% 10/8 "not cleaned 3.28 17.87 5.45 + 22% 11/8" 5.5 Denter (L-type) cleaned 3.01 April 19 6.33 + 42% 1 "not cleaned 3.30 17.77 5.38 + 22% 1 "mixture of 50% 1.5 den outer layer and 5.5 t * 97 19.56 6.59 + 118% 11/8 "the inner layer control sample 2.89 12.69 4.46?" (cleaned) 100% Rayon All Values are mean values of 5 tampons Even if the presence a finishing agent on the fiber obtained from the uncleaned samples remains, the absorption capacity is influenced somewhat, especially in the case of the 5.5 denier samples, absorb the bloated tampon in both the cleaned and uncleaned The condition of the Syngyna? Est is significantly more than that of the control tampon. The strong "and" weak " puffed material is essentially equally effective. Table II shows the Expansion properties in the longitudinal and transverse directions.

Table II Saturation pad after saturation 100% standard rayon Diameter 1.34 cm, diameter 2j22 cm by 3 denier, dry length 5.1 cm, length 5.1 cm weight 2.91 g 100% inflated diameter 1.34 cm diameter 2.54 cm rayon of 1.5 denier, length 5.4 cm, length 6.4 cm dry weight. 2.95 g 100% inflated diameter 1.34 cm diameter 2.86 cm rayon of 5.5 denier, length 5.4 cm length 6.4 cm Grockengew. 3.18 50 outer layer of diameter 1 + 34 cm diameter 2.86 cm 1.5 den, 50% inner Length 5.4 cm length 6.0 em layer of 5.5 denier, dry weight. 3.19 g As Table II shows, finds both an expansion; in the longitudinal direction as well as a lateral expansion instead, i.e. do not use the tampons made from puffed viscose rayon only in diameter but also in length.

If it was previously possible to manufacture tampons that would absorb absorption of body fluids grow lengthways, so became this caused by din special orientation of the layers of material that make up the tampon was made. However, as shown in Table II above, the tampons made from inflated material in exactly the same way as the control tampons, and the control tampons do not increase in weight, while the tampons do this from bloated material.

This is illustrated in FIGS. 6 and 7, where the tampon 7, which is shown in Fig. 6 in the dry state, grows both in the longitudinal direction and also inflates, i.e. grows in the transverse direction, so that it becomes a larger one Diameter. The tampon 7 of FIGS. 6 and 7 is in the same way as the control tampon manufactured, i.e. two layers of superimposed material are provided, which are formed in an approximately cylindrical shape, and a ribbon or strand 8 is attached to each end of the tampon 7 for withdrawal.

As is clear from the above test results, it is the property of the puffed material causing the longitudinal and thickness growth, and therefore is the special shape of the tampon and / or 'the alignment of the one on top of the other stored layers of the material are not critical with regard to the increase in length or thickness of the tampon, so that the tampon is in any suitable manner with the two layers can be constructed, and the manufacturing method described above is only one optionally 1> option for the manufacture of the tampon.

An investigation was also carried out to determine the context to be determined between the weight and the intake per g.

While the weight of the tampons was varied, the size was standardized. Two groups were studied. One was 5.1 cm in length and diameter 1.34 cm, and the other 5.4 cm long and 1.34 cm in diameter cm, giving the results shown in Table III.

Table III 5.1 cm length-1.34 cm 0 5.4 cm length-1.34 cm titre (den) Total uptake by weight Total uptake weight (g) absorpt. me per g (g) absorpt. me pro ability ability g 1.5 100% blend 1.93 14.21 7.36 2.44 16.88 6.93 1.5 "" 2.22 15.14 6.81 2.73 18.58 6.81 1.5 "" 2.63 17.62 6.70 3.02 19.64 6.50 1.5 4.09 25.97 6.35 5.5 100% "1.82 13.54 7.44 2.48 16.88 6.79 5.5" "2.45 15.80 6.45 2.63 19.06 6.73 5.5 "2 2.79 18.65 6.68 3.18 20.17 6.34 5.5 4.04 25.53 6.31 1.5 outer layer 1.85 13.18 7.08 2.74 18.53 6.77 50% 2.30 16.19 7.04 3.16 20.72 6.55 5.5 inner layer 2.74 17.53 6.39 3.56 22.52 6.32 50% 3.95 25.07 6.35 50/50 mix 1.5 den puffed Rayon from 1.5 3.25 19.70 6.05 den and standard rayon from 3 den 50/50 mixture of 5.5 denier puffed rayon & standard rayon from 3 den 2.99 17.83 5.97 control 100% rayon of 2.61 13.29 5.09 2.93 15.12 5.16 3 denier 3.64 18.18 4.89 Apart from that of the Syngyna test procedures that were used to test those in the tables above To obtain test results shown, certain test data were below Use of clinical tests recorded and where clinical tests are carried out the results were within the range reported by the Syngyna test.

From the above data and other data obtained, it is clear that The most desirable properties of a building material are: 1. Low specific gravity, 2. a system of cavities in the threads that make up the basic component of the material is built up, 3. a fairly close spacing between the cavities.

The difference between the hollow areas of "strong" and "weak" bloated type is not essential in terms of the desired properties for products for absorbing body fluids.

Even though the above examples show results using the from regenerated viscose rayon using techniques such as those used in plastic fiber technology are known, it is also possible by inflating, i.e. by forming hollow Areas in a fiber or thread, the specific gravity of nitrocellulose or other collodion fibers.

Cellulose esters such as acetate can be treated in the same way so that their specific gravity of 1.30 to 1.35 due to the training of cavities can be reduced to a specific weight of around 0.60, and in the same way can triacetate, ethyl cellulose rayon and cuprammonium fibers a specific gravity of 0.60 can be given.

It appears that the inclusion of gaseous material in Bubble shape, as shown in Fig. 5, the effectiveness of a product for absorbing body fluid is not adversely affected.

It appears as if the blood serum or some other liquid, though it is drawn into the voids or hollow areas in the fibers or threads, the trapped gaseous material is sucked off by the bubbles bursting and the Release trapped gas so that it evolves through the porous threads or fibers.

The suction of the bubbles during the absorption phase of use of the inflated cellulosic material is shown in Figs. 8, 9 and 10, respectively Reproductions of photomicrographs of puffed viscose rayon threads of 5.5 denier.

As Fig. 8 shows where the inflated threads or fibers 9 in their dry state, each of the threads or fibers 9 includes numerous hollow or inflated areas 10, wherein gas bubbles or pockets 11 in random Way in some of the hollow areas 10 are distributed.

In Fig. 9 the fibers or threads 9 are shown after they have moisture were exposed. As can be seen in the circled area 12, the Initial stage of absorption the moisture or body fluid the hollow areas 10, the bubbles 11 being removed from the cavity areas 10 when the absorption takes place, In Fig. 10 the fibers or filaments 9 are shown after they have blood serum were exposed.

In addition to absorption in the hollow areas 10. blood cells, which are generally about 7 microns and therefore too large to fit the outer Cellulose surface of the up to penetrate expanded material and to get trapped in the inflated hollow areas on the outside surface of the fibers or threads held. While therefore the blood serum or another body fluid through the capillarity or osmotic forces ins As the interior is drawn, larger constituents of the body fluid are carried through the Cellulosic fibers or filaments absorb and wrap around the outer surface of the fibers or threads or held in the spaces or areas that the fibers or keep threads apart.

As apparently the hollow areas as restrained reservoirs for the body fluid act, it is preferable that the fibers or filaments one have relatively high numbers of hollow areas per unit length. There in addition the capillarity and the osmotic forces play a role in the drawing in of the liquid Playing on the hollow areas, it is obviously preferable if the hollow areas have a relatively close spacing from one another.

Even if the examples described in this application are in particular are directed at a puffed viscose rayon, it should be pointed out that that it is known in the art to puff other products. In U.S. Patent No. 2,913,769, for example, discloses methods of making puffed cellulose acetate, cuprammoniunirayon, llitrocellulose rayon and also of viscose rayon.

It is therefore within the scope of the invention to provide a product for absorption of body fluids to create in the form of a shaped body, at least a part of the body includes a variety of synthetic fibers or threads, at least a portion of said filaments or lasers including voids, and wherein these threads are arranged so that they are relatively randomly spaced areas form between them, whereby the body fluid is absorbed by the shaped body can be, with the liquid in the cavities and that by chance distributed areas is withheld.

Claims (13)

P a t e n t a n 5 p r ü c h e 1. Product for absorbing and retaining body fluids and the components contained in these, which are not shown t that at least a part of this product consists of a plurality of threads from one Cellulosic material includes at least a portion of these filaments having voids includes, and that the threads are arranged so that they are arranged relatively randomly Form spaces between them, the cavities and the randomly distributed Gaps are used for absorption and retention of body fluids, and wherein the randomly arranged spaces are the constituents in the body fluid that are of a size that matches the size of the constituents that can be retained in the cavities. 2. Product according to claim 1, d a d u r c h g e k e n n -z e i c n e t that the threads are made of viscose rayon, nitrocellulose, acetate, ethyl cellulose rayon or cuprammonium (upferammoniak). 3. Product according to claim 1, d a d u r c h g e k e n n -z e i c Neither is it shaped like a tampon. 4. Product according to claim 1, d a d u r c h g e k e n n -z e i c h n e t that the cavities in the threads are arranged at a relatively close spacing from one another are. 5. Product according to claim 3, d a d u r c h g e k e n n -z e i c That is, the product formed into a tampon in length and diameter increases when a liquid is absorbed in it. 6. Product according to claim 5, d a d u r c h g e k e n n -z e i c That is, some of the shops have cavities in which gases are trapped. 7. tampon made from a product according to one of the preceding claims, d u r c h e k e nn n n z e i n e t that a shaped body with certain Initial values of the length and the diameter is provided that a device for pulling away on this body that at least a part of this body is attached Fäden.aus a material based on cellulose that contains at least a portion of these Filaments includes cavities that the filaments are arranged so that they are proportionate randomly arranged spaces between them form, the through this shaped body absorbed body fluid in these cavities and these randomly arranged interstices is retained, and that this shaped body increases in length and diameter from its initial values when a liquid is absorbed in it. 8. Tampon according to claim 7, d a d u r c h g e k e n n -z e i c h n e t that the threads enclosing the cavities are made of regenerated viscose rayon exist 9. Tampon according to claim 8, d a d u r c h g e k e n n z e i c h n e t that these threads have a titer of 1.5 denier. 10. Tampon according to claim 8, d a d u r c h g e k e n n -æ e i c hn e t that these threads have a titer of 5.5 denier. 11. Tampon according to claim 8, d a d ur c h g e k e n n -z-e i c h n e t, that part of these, -F 'threads; n have a titer of 1.5 denier and part one titer of 5.5 "? nier -have. 12. Tampon according to claim 8, d a d u r c h g e k e n n -z e i c h n e t that a part of the molded body also contains filaments without voids. 13. Tampon made using a product according to one of the Claims 1 to 6 is made, d u r c h g e n n n z e i c h n e t that it has a shaped body that means for pulling away on this Ybody is attached that at least part of this body is inflated filaments includes, which are lower in specific gravity than similar, non-inflated Threads, and that these threads are arranged so that they are arranged relatively randomly Form spaces between them. L e r s e i t e