KR102221217B1 - Absorbent sheet and method for manufacturing the same - Google Patents

Abstract

The absorbent sheet according to the present invention includes an upper sheet including a first substrate and a first pile layer formed by tufting a plurality of pile yarns on the first substrate; And a lower sheet including a second substrate and a second pile layer formed by tufting a plurality of pile yarns on the second substrate, wherein the upper sheet and the lower sheet include the first pile layer and the second pile The layers are disposed to contact each other, and an absorbent material may be dispersedly disposed between the upper sheet and the lower sheet.

Description

Absorbent sheet and its manufacturing method {ABSORBENT SHEET AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to an absorbent sheet, and more particularly, to an absorbent sheet having excellent breathability and cushioning feeling and a manufacturing method thereof by including a pile layer formed by tufting a plurality of pile yarns on an upper sheet and a lower sheet, respectively.

Humans excrete secretions such as blood, urine, feces, and menstrual blood through various physiological actions. Disposable absorbent products absorb these secretions and provide a hygienic and convenient environment. That is, disposable absorbent products are products that absorb secretions (e.g., urine, feces, menstrual secretions, vaginal secretions, etc.) excreted by various physiological actions of the wearer, and are typically disposable diapers used by infants or incontinence. (Disposable Diaper), sanitary napkin, and panty liner.

On the other hand, in general, bed sores are inflamed because the skin area of the patient in contact with the bed is not ventilated when a patient with discomfort is lying on the bed for a long period of time and blood circulation is not properly due to pressure due to weight. It refers to the phenomenon that occurs. In particular, in the case of patients who have been lying down for a long time, various types of absorbent products for preventing bedsores have been developed to receive excrement from feces and feces.

In general, the above disposable absorbent products include a liquid-permeable upper sheet in contact with the skin, a super absorption polymer that absorbs and holds secretions that have passed through the upper sheet, and prevents secretions from leaking from the absorber to the outside. It is basically composed of a liquid impermeable back sheet, and has a fastening means that can be fixed to the body.

Disposable absorbent products have been developed into an ultra-thin form that increases the absorbent capacity and makes the thickness thinner in order to quickly absorb secretions excreted by the wearer and provide comfort in use. Accordingly, in recent years, it has become possible to wear disposable absorbent products for a relatively long period of time.

However, in absorbent products, diapers worn by patients who have been lying down for a long time are usually worn for 3 to 5 hours in close contact with the skin, and because the skin is weak and sensitive, excretion such as urine must be quickly absorbed and feces can be accommodated without leakage. You should be able to. Thus, absorbent products such as diapers contain an absorbent structure to rapidly absorb secretions or excreta.

However, the conventional absorbent structure applied to the absorbent product had a disadvantage that the excrement was not dried well due to poor ventilation, and this caused a problem of causing diaper rash, heat rash, or hives to the wearer due to the continued moist condition. Has become. In addition, there is a disadvantage in that the cushion is not good, so it cannot absorb the shock smoothly and it cannot provide a soft fit.

An object of the present invention is to provide an absorbent sheet having improved breathability and cushioning as well as absorbency, and a method of manufacturing the same, in order to solve the problems of the prior art.

An absorbent sheet according to an embodiment of the present invention includes an upper sheet including a first substrate and a first pile layer formed by tufting a plurality of pile yarns on the first substrate; And a lower sheet including a second substrate and a second pile layer formed by tufting a plurality of pile yarns on the second substrate, wherein the upper sheet and the lower sheet include the first pile layer and the second pile The layers are disposed to contact each other, and an absorbent material may be dispersedly disposed between the upper sheet and the lower sheet.

In this case, the first substrate and the second substrate may be made of fibers of 70 to 80 denier/30 to 40 filaments, respectively.

In addition, the first pile yarn and the second pile yarn are monofilaments having 25 to 35 denier, respectively, and each may have a height of 0.2 to 20 mm.

In addition, the absorbent sheet may further include a colloidal coating layer disposed on the rear surface of the first substrate on which the first pile layer is formed, or may further include a urethane coating layer disposed on the rear surface of the second substrate on which the second pile layer is formed. have.

In addition, a method of manufacturing an absorbent sheet according to an embodiment of the present invention includes the steps of preparing an upper sheet on which a first pile layer is formed by tufting a plurality of pile yarns on a first substrate; Manufacturing a lower sheet on which a second pile layer is formed by tufting a plurality of pile yarns on a second substrate; And disposing the upper sheet and the lower sheet so that the first pile layer and the second pile layer are in contact with each other, and distributing an absorbent material between the upper sheet and the lower sheet.

According to an embodiment of the present invention, by including a pile layer formed by tufting a plurality of pile yarns on the upper and lower sheets, respectively, breathability and cushioning feeling are improved, so that shocks can be easily absorbed, and a soft fit is provided. can do.

In addition, the pile layer has an effect of improving water absorption by forming appropriate pores to hold the absorbent material disposed between the pile layers.

Accordingly, the absorbent sheet of the present invention is very effective for use by patients who have been lying down for a long time, and is suitable for use in preventing bedsores.

In the present invention, various modifications may be made and various forms may be applied, and specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing each drawing, similar reference numerals have been used for similar elements. In the accompanying drawings, the dimensions of the structures are shown to be enlarged than actual for clarity of the present invention. Terms such as first and second may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of being added. Further, when a part such as a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the case where the other part is "directly above", but also the case where there is another part in the middle. Conversely, when a part such as a layer, a film, a region, or a plate is said to be "under" another part, this includes not only the case where the other part is "directly below", but also the case where there is another part in the middle. In addition, in the present application, the term "top" may include a case where it is disposed not only in the upper part but also in the lower part.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

The absorbent sheet according to an embodiment includes an upper sheet; Lower sheet; And an absorbent material disposed between the upper sheet and the lower sheet.

First, the upper sheet may include a first substrate and a first pile layer formed by tufting a plurality of pile yarns on the first substrate.

The first substrate is a support structure for fixing and supporting a plurality of pile yarns, and may include a raschel structure. The first substrate is preferably a breathable sheet made of fibers of 70 to 80 denier/30 to 40 filaments, and a two-ply sheet may be used. In addition, the material of the first substrate may be made of any one of polyolefin, polyester, and nylon.

The first pile layer is formed of yarn tufted on the first substrate, and may be a plurality of pile yarns tufted on the first substrate in a cut type. The material of the pile yarn may be made of any one of polyolefin, polyester, and nylon. The material of the pile yarn may be made of the same material as the material of the first substrate, or may be made of different materials. In addition, the pile yarn may include a monofilament having a fineness of 25 to 35 denier. The height of the pile yarn of the first pile layer is preferably 0.2 to 20 mm, more preferably 10 to 20 mm, and even more preferably 15 to 20 mm in order to maintain an appropriate voluminous feel.

In addition, when the first substrate is made of a two-ply sheet, it is preferable that the pile yarn is tufted on the overlapped two-ply sheets, thereby connecting the two-ply sheets.

The lower sheet may include a second substrate and a second pile layer formed by tufting a plurality of pile yarns on the second substrate.

The second substrate is a support structure for fixing and supporting a plurality of pile yarns, and may include a raschel structure. The second substrate is preferably a breathable sheet made of fibers of 70 to 80 denier/30 to 40 filaments, and a two-ply sheet may be used. In addition, the material of the second substrate may be made of any one of polyolefin, polyester, and nylon.

The second pile layer is formed of yarn tufted on the second substrate, and may be a plurality of pile yarns tufted on the second substrate in a cut type. The material of the pile yarn may be made of any one of polyolefin, polyester, and nylon. The material of the pile yarn may be made of the same material as the material of the second substrate, or may be made of different materials. In addition, the pile yarn may include a monofilament having a fineness of 25 to 35 denier. The pile yarn of the second pile layer can maintain a proper volume and hold the absorbent material, and the height is preferably 0.2 to 20 mm, more preferably 10 to 20 mm, and even more preferably 15 to 20 mm. desirable.

In addition, when the second substrate is made of a two-ply sheet, it is preferable that the pile yarn is tufted on the overlapped two-ply sheets, thereby connecting the two-ply sheets.

The upper sheet and the lower sheet may be disposed so that the first pile layer and the second pile layer come into contact with each other. In this case, the rear surface of the first substrate on which the first pile layer is formed may be a surface in contact with the skin, and may further include a colloidal coating layer. In addition, a urethane coating layer coated with a polyurethane resin may be disposed on the back of the second substrate on which the second pile layer is formed, or a waterproof cloth laminated with a polyurethane film may be disposed. Do not.

In addition, an absorbent material may be dispersedly disposed between the upper sheet and the lower sheet, that is, in a portion where the first pile layer and the second pile layer are in contact. As the absorbent material, those well known in the art may be used, such as acrylate polymer crosslinked product, vinyl alcohol-acrylate copolymer crosslinked product, maleic anhydride graft polyvinyl alcohol crosslinked product, acrylate-methacrylate copolymer Crosslinked product, crosslinked product of saponified product of methyl acrylate-vinyl acetate copolymer, crosslinked product of starch-acrylate graft copolymer, crosslinked product of saponified product of starch-acrylonitrile graft copolymer, crosslinked carboxymethylcellulose , Isobutylene-maleate anhydride copolymer crosslinked product, methylene oxide polymer crosslinked material, and the like, but is not limited thereto. This absorbent material serves to absorb and retain a large amount of fluid as a water-swelling polymer.

The absorbent sheet of the present invention as described above includes a pile layer formed by tufting a plurality of pile yarns on the upper sheet and the lower sheet, respectively, so that breathability and cushioning feeling are improved, so that shock can be easily absorbed, and a soft wearing feeling Can provide. In addition, the pile layer has an effect of improving water absorption by forming appropriate pores to hold the absorbent material disposed between the pile layers.

Accordingly, the absorbent sheet of the present invention is very effective for use by patients who have been lying down for a long time, and is suitable for use in preventing bedsores.

Hereinafter, a method of manufacturing the absorbent sheet will be described in more detail.

In the first step, a plurality of pile yarns are tufted on the first substrate to manufacture an upper sheet on which the first pile layer is formed.

The first substrate includes a raschel structure, and is preferably a breathable sheet made of fibers of 70 to 80 denier/30 to 40 filaments, and a two-ply sheet may be used. In addition, the material of the first substrate may be made of any one of polyolefin, polyester, and nylon.

The first pile layer is formed by tufting the pile yarn on the first substrate using a conventional tufting machine. The material of the pile yarn may be made of any one of polyolefin, polyester, and nylon. The material of the pile yarn may be made of the same material as the material of the breathable sheet, or may be made of different materials. In addition, the pile yarn may include a monofilament having a fineness of 25 to 35 denier.

Thereafter, the tufted pile yarn is cut using a cutting blade heated to a temperature lower than the melting point of the pile yarn, and remains standing on the first substrate. At this time, the height of the pile yarn of the first pile layer is preferably 0.2 to 20 mm, more preferably 10 to 20 mm, and even more preferably 15 to 20 mm in order to maintain an appropriate voluminous feel.

In addition, when the first substrate is made of a two-ply sheet, it is preferable that the pile yarn is tufted on the overlapped two-ply sheets, thereby connecting the two-ply sheets.

Meanwhile, the rear surface of the first substrate on which the first pile layer is formed is a surface in contact with the skin, and may further include coating a colloid on the rear surface of the first substrate on which the first pile layer is formed.

In the second step, a lower sheet on which a second pile layer is formed is manufactured by tufting a plurality of pile yarns on the second substrate. Specifically, a second pile layer is formed by tufting the pile yarn on the second substrate using a conventional tufting machine.

In this case, the material and structure of the second substrate may be the same as the first substrate described above, and the material of the pile yarn forming the second pile layer may also be the same as the pile yarn of the first pile layer.

On the other hand, the tufted pile yarn is cut using a cutting blade heated to a temperature lower than the melting point of the pile yarn, and remains standing on the second substrate. At this time, the pile yarn of the second pile layer can maintain an appropriate volume feeling, and in order to hold the absorbent material, the height is preferably 0.2 to 20 mm, more preferably 10 to 20 mm, and 15 to 20 mm. Even more desirable.

Thereafter, it may further include a step of forming a urethane coating layer by coating a polyurethane resin on the back surface of the second substrate on which the second pile layer is formed, or disposing a waterproof cloth laminated with a polyurethane film. Prevent fluid from leaking to the outside.

In the third step, the upper sheet and the lower sheet are arranged so that the first pile layer and the second pile layer are in contact, and the absorbent sheet is completed by dispersing an absorbent material between the upper sheet and the lower sheet.

Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art or those of ordinary skill in the relevant technical field will not depart from the spirit and scope of the present invention described in the claims to be described later. It will be appreciated that various modifications and changes can be made to the present invention within the scope of the invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be determined by the claims.

Claims (6)

An upper sheet including a first substrate and a first pile layer formed by tufting a plurality of pile yarns on the first substrate; And
A second substrate and a lower sheet including a second pile layer formed by tufting a plurality of pile yarns on the second substrate,
The upper sheet and the lower sheet are disposed so that the first pile layer and the second pile layer contact,
An absorbent sheet in which an absorbent material is dispersed and disposed between the upper sheet and the lower sheet. The method of claim 1,
The first substrate and the second substrate is an absorbent sheet made of fibers of 70 to 80 denier / 30 to 40 filaments, respectively. The method of claim 1,
The first pile yarn and the second pile yarn are monofilaments of 25 to 35 denier, respectively, and each of the absorbent sheet has a height of 0.2 to 20 mm. The method of claim 1,
The absorbent sheet further comprising a colloidal coating layer disposed on the rear surface of the first substrate on which the first pile layer is formed. The method of claim 1,
An absorbent sheet further comprising a urethane coating layer disposed on the rear surface of the second substrate on which the second pile layer is formed. Tufting a plurality of pile yarns on a first substrate to prepare an upper sheet on which a first pile layer is formed;
Manufacturing a lower sheet on which a second pile layer is formed by tufting a plurality of pile yarns on a second substrate; And
And disposing the upper sheet and the lower sheet so that the first pile layer and the second pile layer are in contact with each other, and distributing an absorbent material between the upper sheet and the lower sheet.