DE1946056A1 - Device for sucking up liquid, especially absorbent disposable pad or the like. - Google Patents

Description

CRBard, Inc.
Murray Hill, New Jersey, U.S. ₀ A.

Device for sucking up liquid, in particular disposable absorbent pad O ₀ like.

The invention relates to a device for sucking up liquid, in particular absorbent disposable pads or the like.

Currently available documents usually consist of a 0.5 to 1 mil thick film of polyethylene as a waterproof back, an absorbent padding or loose mass of cellulose or the like. and a cover layer of soft, wet strength, nonwoven material. Such documents, where dimensions of 172 ^{x 2} ^ ^or 36 χ 24 inches are common, can absorb 25 to 50 ml V / ater and then remain completely moist and wet to the touch. Lying on such a wet mat is very harmful for the patient, since diaper rash or other skin irritation can be caused if the mat is not changed often, and since these offer neither protection nor comfort to the patient. In many cases, the moisture is transferred to the bed linen. In practical use, several such documents must be used in frequent alternation, which required higher costs and maintenance time

One of the objects of the invention is to provide a disposable bed pad or the like. to create, which has an absorbent layer of wet-strength paper, v / which urine (or other liquid) on pulls itself and offers the patient a relatively drier surface to lie on, whereby the possibility of bed sores, secondary bacterial infection and other skin irritation as a result of the wetting of the skin with urine for prolonged periods of time is decreased.

009827/1691

According to the U.S. patent 3344789, attempts have already been made Aspirate urine using aqueous calcium silicate. Such attempts, however, proved inadequate * For example, packaged powder forms a very lumpy and uncomfortable base and is very difficult to dispose of. The document is very expensive.

The device, preferably a support, according to the invention is characterized by a fiber-containing material for distribution the liquid, and a powdery material for Absorption, which are connected to form a flat, uniform body, that the distribution material and the absorption material stand in close contact with each other.

It has been found that making cardboard with a conventional paper machine, such as a Fourdrinier machine, with a filling of aqueous calcium silicate results in a softer, more pleasant product that binds liquid, which is easier to remove and also easier to manufacture. Furthermore, it was found that certain (namely absorbent) types of cotton waste material result in a better execution in connection with aqueous calcium silicate together with the commercially available auxiliaries for binding the powder in the layer. With such a manufacturing process, cardboard can be filled with aqueous calcium silicate up to 10% of its weight. Handcrafted laboratory samples show that the amount can go as high as $ 80. However, at this high percentage the product is fragile. In theory, the higher the absorbent powder content, the more absorbent the product becomes for a given basis weight and obviously more economical for a given manufacturing cost.

It was found that the amount of liquid absorbed depends on three parameters, namely 1 »the amount of powder, '2. the Type of filling compound and 3. the density of the layer. Laboratory tests show that products with the same filling mass, the same pulp -mixing (determined by the standard Tappi incineration test), however. alt different density actually different

009827/189 1

BATH ORIGINAL

Ingesting amounts of urine (or other liquids) «, It will the more liquid is bound, the lower the density of the Shift is ο

A mass of cotton waste shows the advantageous property distribute the liquid from the point of contact to the outer boundaries of the supports and thereby, compared to other products currently available, a larger percentage to make the surface usable.

For example, if a pad is sized to hold 330 ml of liquid, it was found that the surface felt dry to the touch within 1 to 5 minutes when 80% of this amount had been added to the product. If only 10 or 2.0% of the theoretically possible amount is used, the surface dries within 30 seconds or less. If the volume of the liquid remains below the limit which the layer is intended to absorb, the bed base can be lifted or printed without the liquid dripping off. This eye-catching demonstration of fluid retention and patient protection cannot be achieved with any other single-use product currently available.

Another embodiment of the invention is performed from aqueous solution made using conventional paper-making technology and consists of two layers of cardboard, preferably made from cotton waste, However, it should also consist of other materials, such as alpha cellulose, wood masfie and the like. Between the two Layers is a layer of aqueous calcium silicate that can be painted onto one layer. In this way the aqueous calcium silicate is trapped between the two layers. Such a product behaves quite well similar to the previously described embodiment to which still under the designation "matrix powder paper product" Is referred to. An advantage of this modified embodiment is shown in applications where limited edges and high absorbency are required. The two

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outer layers on each side can be relatively thin compared to the thick layer or »the core of aqueous calcium silicate be. In the formation of pus in this particular embodiment a bottom layer made of a waterproof material such as polyethylene can be provided «,

In addition, a moisture-proof material, such as fabric-bonded polyester, can be used as the cover layer in both embodiments. be provided in the matrix powder paper product and the above-mentioned layered product. The commercially available material with the trade name REMAY (a product of Dupont Comp *) is suitable for use with the latter product. This material has been found to have two obvious advantages. Firstly, with a given amount of liquid that is poured onto the surface of the product covered with REMAY or the like, the time to reach a dry surface, ie dry to the touch or on the skin, is noticeably reduced. Experiments have shown time reductions of up to 50% _e The second obvious advantage is that the absorption capacity of a base in the manner of the matrix powder paper product or the layered product is increased. This is obviously based on the fact that the layers of the matrix powder paper product that are directly adjacent on the surface or the surface can be used to absorb liquid without any perception of surface moisture when touched or on the skin. «Obviously, more than 10 % Capacity can be expected for a given size.

According to the invention designed documents can absorb 25 to 500 ml liquid and remain dry and relatively in contact _e as a result achieves a reduction in the number of documents required less change and maintenance services, as well as less irritation and discomfort to the patient. Furthermore, less fresh bed linen is required. Attention from the nursing staff.

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Implementation forms of the invention are shown in the drawings. Show it:

1 shows a detail of a top view of the corner of a base,

Fig.2 shows a section along the line II-II in Fig.1, the thickness the layers are shown enlarged for explanation, FIG. 3 shows a similar section with two absorbent layers, 4 shows a similar section of a modified embodiment the document.

The base according to FIGS. 1 and 2 'contains a layer 1 for distribution and absorption of liquid, which consists entirely of cotton waste matter, and a certain amount of aqueous calcium silicate (commercially available, for example, under the trademark "Micro-Cel-E" from Johns-Mansville Sales Corp., which is up to 560% of its own weight in liquid as a dry powder) included in the mass, so that a homogeneous .Layer of any thickness, formed like blotting paper The weight percentage of the powder in the layer can be varied within wide limits depending on the intended use. The maximum value for practical use is about 85% o The powder is made according to conventional paper-making processes added to the crowd. Cotton waste 'have excellent Absorbent properties and ensure immediate transfer of the liquid to the enclosed powder «

The top layer 2 is made of moisture-proof, non-woven porous material that quickly transfers liquid and thereby retains its moisture resistance. Fabric-bound polyester shows excellent results and also satisfies other non-woven fabrics made in the usual '.' / iron.

The backsheet 3 is a moisture-proof separation between the absorbed layer 1 and the base (z _e B, the bed) on which it rests, and is gewöhnlich.aus a film of polyethylene in a strength of 0.5 to 1, 0 mil. This is drawn around the outer hands of la /? En 1 and 2 and

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closes the outer parts, which are designated with 4, so that the three layers are connected to each other. As shown in Fig. 1 represents, the rear layer can be folded up and close all four sides of the rectangular base or on the two shorter sides remain open,

■ A greater absorption capacity is desired than is the case with a single layer for spreading and vacuuming is possible, so 'can two or more such elements can be provided. Pig.3 shows a section of a base with two layers 5 and 6, the as described above are covered by a non-woven, porous layer, and the back is covered by an impermeable layer Layer 8 is covered, also as described above Condition have a thickness in the range of 0.25 to 2.5 mm, which is adequate flexibility and at the same time adequate Absorbance guaranteed if necessary a large number of such layers are naturally more flexible than a single layer of the same thickness »

In the in Figure 4 shown modified embodiment, a layer is 9 11 enclosed by aqueous calcium silicate between about underlying layers and 10, made of cardboard, which is preferably made of cotton waste, but also from alpha cellulose, wood pulp o ₀ like "consist kann.- As can be seen, the layers 9, 10 and 11 are covered on the back by a layer or film of impermeable material 12 which, as in the case of FIGS. 1 to 3, is folded around the edges, as indicated by the reference numeral 13, in order to completely enclose the layer of absorbent material and in this way to form a single large container for the powder, the displacement of which is prevented by the adjacent surface or surfaces of the distribution material. A cover layer 14, which corresponds to layer 2, can be applied if necessary. Modifications of the embodiment according to FIG . Veining of the liquid

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ke it intake capacity or in porting the layer 11 exist, -which the layer 9 is applied directly to the layer 12 «,

Is the top surface of layers 1, 5 and 10 suitable designed, e.g. smooth and / or soft enough to provide comfort, the cover layers 2, 7 or 14 can be omitted will. The suction effect of the distribution material is based on the property of quickly draining the liquid from the surface and feed it to the recording material.

The embodiments described above appear not only suitable for use in hospitals as documents, but are also available in suitable dimensions as hygienic templates, inserts for breastfeeding bras, diapers, wound dressings and for other uses that are not necessarily medical Area are limited, usable »

14 claims
1 sheet of drawings

009827/1691

Claims (1)

Patent claims Device for sucking up liquid, especially absorbent Disposable pad or the like., Characterized by a fibrous Material for distributing the liquid and a powdery material for absorption, which in such a way form a flat, uniform body are connected that the distribution material and the absorbent material in close contact with each other stand,, 2. Apparatus according to claim 1, characterized in that the fiber-containing distribution material is a planar last with gaps forms between the fibers, which are filled with the absorbent material in close connection with the fiber material sindo. 3. Apparatus according to claim 1, characterized in that the flat, uniform body, two layers (10, 11) of fibrous distribution material and one enclosed between them Contains layer (9) of absorbent material. 4. The device according to claim 1, characterized in that the liquid distribution material is sheet-shaped, and the absorption material as a layer in close surface contact is arranged between one surface and a rear layer (8). 5 ο device according to one of claims 1 to 4, characterized by an absorbent material that is able to absorb at least 400% of its own weight in liquid without getting wet yourself. 6. Device according to one of claims 1 to 5, characterized in that that the distribution and absorption materials between a porous cover layer (2,7,14), which is at least extends over a surface of the body, and one for fluid 009827/169 1 impermeable back layer (3, 8, 12), which covers the other surface of the body, including i <ind " 7o device according to one of claims 1 to 6, characterized in that that the liquid-distributing material contains at least one layer made of a mass of cotton waste. 8. Device according to one of claims 1 to 6, characterized in that that the liquid distribution material is made from cotton waste ο 9 ο Device according to one of claims 1 to 8, characterized in that that the absorbent material consists of aqueous calcium silicate, preferably as an admixture of up to 85% of the weight further material is added « 10. The device according to claim 6, characterized in that the cover layer (2,7,14) consists of a non-woven fabric =, 11. The device according to claim 6, characterized in that the cover layer (2, 7, 14) consists of fabric-bound polyester. 12. Device according to one of claims 6 to 11, characterized in that that the rear layer (3, 8, 12) is the whole of the surface opposite to the surface covered with the porous cover layer Covered surface and over at least two opposite edges, preferably all edges, of the sheet-like body and is folded over the top layer » 13o device according to one of claims 1 to 12, characterized through dimensions and design as a ready-to-use test base, Bed pad or pad » 14 · Device according to one of claims 1 to 12, characterized by dimensions and design for carrying on the human body. 009827/1691 Blank page