DE2910590A1 - DISPOSABLE HYGIENE ITEMS AND METHOD FOR THEIR PRODUCTION - Google Patents

Description

description

The present invention relates to disposable absorbent hygiene articles, such as diapers or sanitary napkins, as well as a method for producing such disposable hygiene articles. .

A number of patents are already known which cover diapers, sanitary napkins and similar disposable products, those with absorbents Upholstery are provided, concern. In particular, there has been a great deal of activity in the development of absorbent inner layers in these hygiene items. The inner layers of well-known disposable hygiene articles are indeed sufficiently absorbent to absorb a considerable amount of escaping liquid; she but do not have the ability to accommodate fluids that suddenly appear in large quantities and thus a To prevent leakage, because the inner part of such well-known hygiene articles is not suitable for the rapid absorption of larger ones Fluid volumes is set up. In other known hygiene articles such as diapers and sanitary towels, the inner part is while able to prevent the seepage of liquid effusions, but not able to do so within reasonable limits Time to absorb a sufficient total amount of liquid, because the means for rapid liquid absorption

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would take the total capacity of the inner layers to accommodate Fluid is reduced.

There are already several means of absorbing, transferring and distributing liquid in one Inner part has been used, for example according to US Pat. No. 2,896,627 longitudinally corrugated paper in the middle of the Interior part. There are also recesses and holes in the inner parts have been provided, such as in the U.S. Patents 3,593,717, 3,403,689, 3,046,986, and 3,749,627. From US-PS 3,666,611 a layer of a Fiber mass with a central compressed part, known. Embossing and folding processes have also been used to increase the amount of absorption, for example from US Pat 2 952 260. According to U.S. Patent 3,291,131, sanitary napkins and diapers can be manufactured on flexible assembly lines. Other US patents relating to the process of making absorbent pads on flexible conveyors are 2 973 760, 3 268 954, 2 872 023, 3 225 898, 3 439 and 3 203 419.

The present invention is based on the object of hygiene articles to create the deficiency noted above

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avoid the known hygiene articles entirely or largely, and to provide a method for producing such advantageous hygiene articles that are absorbent in a simple manner Makes it possible to manufacture pads for diapers, sanitary napkins or similar disposable items without it being affected by the Manufacturing process to an impairment of the overall absorbency and the quick absorption capacity of the disposable product for larger amounts of liquid.

According to the invention, the object is achieved by a disposable hygiene article, in particular a sanitary napkin, consisting of an absorbent core layer with a corrugated fabric layer, which lies between two layers of soft, loose fiber mass, upper and lower layers of wadding, which are placed over or over. are arranged under the absorbent core layer, a liquid-impermeable Foil that is wrapped around the top layer of cotton wool and the absorbent core layer and their ends on the lower cotton layer are attached, and a sheet-shaped nonwoven fabric, which the cotton layers, the core layer and the envelops liquid-impermeable film, the lower Layer of soft, loose fiber, facing the user, with embossed recesses and above the recesses are strongly compressed.

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The disposable sanitary article according to the invention is capable of occurring Resists liquid spills and has an extraordinarily high total absorbency.

The invention also extends to a method of manufacture of absorbent disposable hygiene articles, in particular sanitary napkins, which is characterized in that one first layer of soft, loose fiber mass subjected to an embossing, with recesses formed in the layer and the parts above the recesses are pressed together, the layer having the recesses on its underside on a lower layer of cotton wool, a corrugated sheet surface on the upper side of the first layer and on the corrugated leaf surface applies a second layer of soft, loose fiber mass, creating an absorbent core layer, on which an upper layer of cotton wool is placed, then the upper and lower layer of cotton wool are folded together using a roller ("roller crimped together"), the material built up in this way forms by cutting and punching, then rotates it by 90 °, then wraps a liquid impermeable film around the top wadding layer and the absorbent core layer and dividing them Edges attached to the lower layer of cotton wool and finally the structure thus obtained is wrapped in sheet-like nonwoven fabric.

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In one embodiment of the invention, two separate Layers of soft, loose fiber mass are placed on a flexible conveyor, with a two-layer, corrugated Layer of tissue is placed in between. One of the two layers of loose, soft fiber mass is embossed around in the Layer to form subdivided recesses. The parts lying above the recesses are strongly pressed together. Above and below, two-layer wadding is placed underneath and placed over the layers of soft, loose fiber mass. A film made of polyethylene or a similar liquid-impermeable film Material is wrapped around the top soft, loose fiber mass layer and the top cotton wool layer stretches made in such a way that their edges protrude and adhere firmly to the edge parts of the lower layer of cotton wool. The ends of the Wadding layers are pleated and a sheet-shaped non-woven fabric is wrapped around the entire structure and with the help of a pressure-sensitive adhesive attached. The latter also serves as an adhesive during use of the hygiene article. A release paper, for example one that has been treated with silicone Paper, is attached to the adhesive to make the product to protect until it is needed.

According to the invention there is thus a disposable product that subdivided, recesses that are connected to each other could be. The recesses are embossed so

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forms that the material located under the recesses is strongly compressed. Those formed by the embossing Recesses with compressed parts underneath are advantageous because there are effusions of escaping liquid can easily be picked up and accommodated by them, but the compressed parts prevent them from moving the absorbed liquid pours through the cushion at the compressed areas. This is how you get a improved distribution of the outgoing fluid.

The invention is explained further below with reference to embodiments shown in the figures.

FIG. 1 shows a longitudinal section through an embodiment of a sanitary napkin according to the invention.

Figure 2 shows a plan view of the sanitary napkin, wherein some parts are cut.

Figure 3 shows a vertical section through the

Area along line 3-3 in Figure 2 was laid.

FIG. 4 shows a partial cross-section of the surface along the line 4-4 in FIG.

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FIG. 5 shows a partial plan view of a modified formation of the lower layer with grooves which the
Connect recesses with each other.

Figure 6 also shows a partial plan view of another
Embodiment of the lower layer.

FIG. 7 shows a partial cross-section of the surface along the line 7-7 in FIG.

FIG. 8 shows a partial cross-section of the surface along the line 8-8 in FIG.

In Figure 2 is an example of an inventive
Disposable hygiene article, a sanitary napkin 10 is shown in plan view, which contains an absorbent core layer 12. Of course, the invention can also be applied in the same way to disposable winches or similar products.

The absorbent core layer 12 consists of an upper layer made of a soft, loose fiber mass and a lower layer
Layer 16 also made of a soft, loose fiber mass, with recesses 18 being provided in the latter which extend almost completely, but not completely, through layer 16. The recesses 18 are arranged so that they

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Facing users, and are about 4/5 the thickness of the lower layer 16. They are made by hot or cold stamping produced, which helps to compress the material 19 lying under the recesses. Grooves 21 can connect the recesses 18 to one another, as in FIGS Figures 5 and 7 shown. These grooves can be subdivided "lines" of the recesses. The grooves 21 are in the Usually not as deep as the recesses 18. Optionally, each recess can go through with all neighboring recesses linear grooves 23 as well as with transverse grooves 25 or with diagonal grooves 27 and 29 be connected. These Grooves can be as deep as the recesses 18, see 23 in FIG. 8. They ensure an optimal distribution of the liquid.

A two-layer, corrugated fabric surface 20 lies between the layers 14 and 16 of soft, loose fiber mass. Under the layer 16 there is a two-layer wadding insert 22, while an upper two-layer wadding insert 24 covers the top surface of layer 14. A slide off Water impermeable material 26, for example made of polyethylene, lies on top of the wadding layer 24, spreads over the core layer 12 and is on the edges of the lower batting layer 22 with the help

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of glue or glue 28 attached to end pieces 30 and 32 is provided, attached. The end pieces 30 and 32 extend does not extend below the recesses 18. A leaf-shaped one Nonwoven fabric 34 which covers the lower wadding layer 22, uncovered the upper wadding layer 24 and the waterproof one Foil 26 so that it covers them, with them at their edges can be attached by pressure sensitive adhesive 36. A strip of silicone-containing release paper 38 is with pressure sensitive adhesive 40 is provided and attached so that it overlies the nonwoven fabric 34. The ends of the Wadding layers 24 and 22 and the ends of the sheet-shaped nonwoven fabric 34 are tied together with a roller End pieces 42. The recesses 18 and grooves 21 or 23 provide means for receiving liquid pourings while the corrugated fabric surface 20, which is preferably in the longitudinal direction is corrugated, for the liquid distribution from the absorbent fiber mass layer 16 to the absorbent fiber mass layer 14 is provided. The compressed areas 19 under the recesses and grooves prevent flooding of the corrugated fabric surface 2Ov The sheet-shaped fiber fleece ensures a dry contact surface, while the water-impermeable Foil 26 protects against leaks.

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The disposable hygiene articles according to the invention, in particular Sanitary napkins are made on an endless conveyor belt using two separate layers softer, looser fiber mass is used, which lie on top of each other with a two-layer, corrugated layer in between Fabric surface 20. The bottom layer of the loose fiber mass is formed by the recesses 18. The absorbent core layer 12 lies on the lower wadding layer 22, which is two-ply and which extends in the longitudinal direction around the absorbent Core layer is folded, whereas the upper layer of cotton wool 24 on. of the core layer 12 and upper and lower cotton layers are crimped by rolling. The strip-like structure is then shaped by cutting and punching out and then turned 90, so that you can feed a polyethylene film 26 over the top, fold around and along the Can attach glue joints on the lower layer of cotton wool 22. The sheet-shaped non-woven fabric 34 is then wrapped around the bandage and its edges are attached by adhesive, which also serves to seal a silicone-containing release paper to hold on to it while the product is not in use.

There are many modifications and variations of the present invention sanitary disposable items, especially sanitary towels, and the method for their production, which are within the inventive range disclosed herein.

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Claims (9)

PATENT CLAIMS 1. Consisting of disposable hygiene articles, in particular sanitary towels from an absorbent core layer (12) with a corrugated fabric layer (20), which lies between two layers (14) and (16) made of soft, loose fiber mass, upper and lower layers (24) and (22) of wadding, which are arranged above and below the absorbent core layer (12), respectively are, a liquid-impermeable film (26) around the top cotton wool layer (24) and the absorbent Core layer (12) is wound and the ends of which are attached to the lower wadding layer (22), and a sheet-shaped Nonwoven fabric (34), which the cotton layers (24) and (22), the core layer (12) and the liquid-impermeable «09840 / OSa? Foil (26) envelops, the lower layer (16) made of softer, looser fiber mass. facing the user is provided with embossed recesses (18) and is strongly compressed above the recesses, 2. Hygiene article according to claim 1, characterized in that it is equipped with a silicone release paper strip (38) which is adhesively attached to the sheet-shaped nonwoven fabric (34) and overlying this. 3. Hygiene article according to claim 1, characterized in that the recesses (18) over about 4/5 of the thickness the lower layer (16) extend. 4. Hygiene article according to claim 1, characterized in that there are grooves (21), (23) in the lower layer (16) that connect the recesses (18) with one another. 5. Hygiene article according to claim 4, characterized in that the grooves (23) are just as deep as the recesses (18). 109840/0627 2310590 6. Hygiene article according to claim 4, characterized in that the grooves (21) are shallower than the recesses (18) 7. Process for the production of disposable hygiene articles, in particular sanitary napkins, characterized in that there is a first layer (16) made of a soft, loose fiber mass subjected to an embossing, with recesses (18) formed in the layer and the parts (19) above of the recesses are pressed together, the first having the recesses (18) on its underside Layer (16) on a lower layer of cotton wool (22), a corrugated sheet surface (20) on the upper side of the first layer (16) and on the corrugated sheet surface (20) a second layer (14) made of soft, loose fiber mass applies, forming an absorbent core layer (12) on which an upper layer of cotton wool (24) is placed ' then folds the top and bottom wadding layers together using a roller, the material built up in this way Shapes by cutting and punching, then rotates it 90 °, then a liquid-impermeable film (26) around the top wadding layer (24) and the absorbent core layer (12) and their divided edges on the attached to the lower layer of cotton wool (22) and finally the structure obtained in this way with sheet-like nonwoven fabric (34) enveloped. 909840/062? ORiGiNAL INSPECTED 8. The method according to claim 7, characterized in that the edges of the sheet-shaped nonwoven fabric (34) with Adhesive and then a silicone release paper (38> attached to it. 9. The method according to claim 8, characterized in that the sheet-shaped non-woven fabric with a pressure-sensitive * Adhesive is provided. 909840/0627