JP2003052745A - Body fluid absorber - Google Patents

Abstract

(57) [Problem] To provide a bodily fluid absorber that makes use of the hygroscopic property of cellulose fiber, does not easily re-wet, is comfortable when worn, and allows the state of absorbing bodily fluid to be seen from the surface. A first layer made of a nonwoven fabric containing cellulose fibers, a second layer made of a hydrophilic nonwoven fabric,
A laminate in which a third layer made of an absorber and a fourth layer made of a liquid-impermeable exterior material are sequentially stacked, wherein the first layer is used on the skin side, and the absorbed body fluid is A bodily fluid absorber characterized by being seen through from the first layer side.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a body fluid absorber,
More specifically, the present invention relates to a body fluid absorber used for a delivery pad and the like.

[0002]

2. Description of the Related Art A delivery pad which has been one of the body fluid absorbers is conventionally used after childbirth and its main purpose is to absorb bad dew and protect wounds. As the material on the skin side of the delivery pad, cotton products such as medical gauze, synthetic fibers, and materials containing cellulose fibers are often used. When synthetic fibers are used as the surface material, there is a drawback that the surface is not hygroscopic and thus easily stuffy. In addition, hydrophilic treatment was required to prevent liquid flow on the surface. As this hydrophilic treatment method, a method of applying and impregnating a hydrophilic agent is known, but there is a possibility that the hydrophilic agent may come into contact with the wound. was there.

On the other hand, when a nonwoven fabric made of cellulose fiber having water absorption and hygroscopicity is used as the surface material, the above-mentioned drawbacks of the synthetic fiber are solved, but the body fluid absorbed from the surface material to the absorber is Wet the surface material again and return.
There was a problem of so-called getting back wet. This not only makes the wearer uncomfortable, but also impairs the hygroscopicity which is a characteristic of the cellulose fiber, and sometimes causes rash on the skin surface. In addition, when examining the postpartum process at a hospital, it is necessary to accurately grasp the amount and color of bad dew absorbed in the delivery pad or its spreadability. It is necessary to accurately see the state of dew through the surface material of the production pad, and a highly transparent surface material has been demanded.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems of the prior art and to make good use of the hygroscopicity of cellulose fibers, to prevent rewetting, to be comfortable when worn, and to absorb body fluids. The object is to provide a body fluid absorber whose condition can be seen from the surface.

[0005]

Means for Solving the Problems The present inventors have diligently studied the above-mentioned problems, and by using a non-woven fabric containing cellulose fibers as a surface material and a hydrophilized synthetic fiber in combination, the above-mentioned problems are solved. The inventors have found what can be achieved and have reached the present invention. The invention claimed in the present application for achieving the above object is as follows.

(1) A first layer made of a nonwoven fabric containing cellulose fibers, a second layer made of a hydrophilized synthetic fiber nonwoven fabric, a third layer made of an absorbent body, and a first layer made of a liquid impermeable exterior material. A body fluid absorber, which is a laminated body in which four layers are sequentially stacked, and the body fluid absorbed from the first layer can be seen through from the first layer side. (2) The body fluid absorbent according to (1), which has a liquid absorption rate of 80 seconds or less using pseudo blood and a wet-back property of 1.0 g or less. (3) The body fluid absorbent according to (1) or (2), wherein the amount of the hydrophilic agent attached to the hydrophilized synthetic fiber nonwoven fabric is 10% by weight or less. (4) The non-woven fabric containing the cellulose fibers is a regenerated cellulose long-fiber non-woven fabric.
The body fluid absorber according to any one of 1.

[0007]

The laminated body of the body fluid absorbent according to the present invention comprises a nonwoven fabric containing cellulose fibers as the first layer on the side in contact with the skin (skin side), and a hydrophilic synthetic fiber nonwoven fabric as the second layer. Although a liquid absorbing layer and a liquid impermeable outer package are used for the fourth layer, the role of each layer in absorbing body fluid can be explained as follows. Cellulose fibers contained in the first layer quickly absorb body fluid from the skin surface and spread it. The hydrophilized synthetic fiber nonwoven fabric of the second layer quickly transfers the body fluid absorbed in the first layer to the absorber of the third layer. The body fluid absorbed by the absorber is retained therein, and the fourth layer prevents the body fluid from leaking to the outside. By the action of each of these layers, it is possible to prevent absorbed body fluid from returning to the skin surface side,
The surface of the skin does not damp, there is little stuffiness, and it can be kept clean and comfortable. Therefore, it is possible to obtain excellent liquid absorbency and wet-back property (wet-back property), and observe the shape of body fluid absorbed from the first layer side to the absorber due to the see-through effect of cellulose fiber when absorbing liquid. Will be able to

The cellulose fiber of the first layer has moisture absorbing and moisture releasing properties, is gentle to the skin, and has little stuffiness when worn,
Suitable for use on the skin side. The second layer, which is hydrophilized synthetic fiber nonwoven fabric, is located between the surface layer (first layer) and the absorber (third layer), and quickly guides the body fluid wet and spread in the first layer to the absorber. It has a function to prevent the body fluid from getting wet again. When the first layer is a non-woven fabric containing cellulose fibers and the second layer is a hydrophilized synthetic fiber non-woven fabric as in the present invention, highly viscous dew is quickly absorbed by the first layer and spreads wet. Not only can the liquid be quickly absorbed through the second layer, but the shape of the bad dew absorbed by the absorber can be accurately observed through the first layer and the second layer. This phenomenon is due to the water-absorbing property and wettability of the cellulose fiber of the first layer and the see-through effect due to the swelling property of the cellulose fiber, and the liquid transfer effect of the hydrophilized synthetic fiber nonwoven fabric of the second layer. it is conceivable that.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The non-woven fabric containing cellulose fibers used in the present invention may be a non-woven fabric composed of 100% cellulose or a non-woven fabric composed of a combination of cellulose fibers and synthetic fibers. Is preferably 50% by weight or more. Cellulose fibers are used for the first layer that comes into direct contact with the skin, because they swell and become soft when they absorb body fluids, they rarely hurt the wound, the liquid absorption speed is high, and the wettability is excellent.

Examples of the cellulose fiber include cotton, rayon, cupra and the like. The fibers may be long fibers or short fibers, but long fibers are preferred because they are less likely to fall off or fluff and have less irritation when contacted with the skin. Further, when absorbing body fluid, it is preferable that the liquid absorption state is easily visible from the outside. For that purpose, it is preferable to use a material having high transparency when absorbing liquid, and it is particularly preferable to use regenerated cellulose fiber having low crystallinity and good water swelling property among cellulose fibers. The most preferable embodiment of the nonwoven fabric containing the cellulose fiber in the present invention is a nonwoven fabric composed of regenerated cellulose long fibers.

The basis weight of a non-woven fabric containing cellulose fibers is 10
-60 g / m < ² > is preferable, and 10-30 g / m < ² > is more preferable in terms of transparency and wet back property. The fineness of the cellulose fiber is preferably 1.0 to 3 dtex. If it is too thin, it tends to fluff due to friction, and if it is too thick, it may lack softness. There is no particular limitation on the synthetic fiber nonwoven fabric used as the second layer, and the production method thereof is not particularly limited. For example, synthetic fiber non-woven fabric such as polyester, polypropylene, nylon and polyethylene is used.

The above synthetic fiber nonwoven fabric is used after being hydrophilized. Here, hydrophilization means imparting or improving the wettability with water to synthetic fibers, which are generally inferior in wettability with water as compared with cellulose, and the treatment method and the agent used are not particularly limited. For example, a synthetic fiber non-woven fabric whose surface is modified with a hydrophilic agent, or a synthetic fiber in which a hydrophilic agent is kneaded in advance can be used. As the hydrophilic agent, for example, a double-sided surface-active agent, a nonionic surface-active agent, a nonionic surface-active agent, polyvinyl alcohol, carboxycellulose or the like is used. From the viewpoint of wettability and water absorption rate, the amount of application is preferably 10% by weight or less, more preferably 0.1 to 5% by weight.

The thickness of the hydrophilized synthetic fiber nonwoven fabric is
0.1 to 1 mm is preferable, and 0.1 is more preferable.
It is 0.5 mm. The fineness of the fibers constituting the synthetic fiber nonwoven fabric is preferably 0.5 to 5 dtex, more preferably 1.0 to 3 dtex. If the fineness of the synthetic fiber is too thin, the liquid flow on the surface becomes large, and if it is too thick, the wettability to the surface tends to become large. The basis weight of the synthetic fiber nonwoven fabric is preferably 10 to 50 g / m ² , and more preferably 15 to 30 g / m ² .

As the material of the absorber as the third layer, cotton, pulp, superabsorbent polymer, hydrophilic sheet, absorbent sheet and the like are preferably used. The liquid-impermeable outer packaging material as the fourth layer is not particularly limited as long as it is a liquid-impermeable polymer film such as a polyethylene film or a polypropylene film.

The laminated body of the present invention is obtained by laminating the above-mentioned first to fourth layers in order, and the liquid absorption rate measured by using the pseudo blood by the method described below shows a rapid absorption into the absorbent body. From the point, it is preferably 80 seconds or less, more preferably 7 seconds.
It is 0 seconds or less, and the wet-back property (wet-back property) similarly measured using pseudo blood by the method described below is preferably 1.0 g or less, more preferably 0, from the viewpoint of reducing discomfort during wearing. It is not more than 0.6 g.

[0016]

EXAMPLES The present invention will now be described in detail with reference to examples, but the present invention is not limited thereto. In addition,
The evaluation of the liquid absorption rate and the like in the examples was performed by the following methods. (1) Absorption rate: A weighted cylinder (inner diameter 20 mm) is placed in the center of the delivery pad, and 20 m of simulated blood is placed in it.
1 was poured, and the time (seconds) until absorbing liquid was measured. The pseudo blood used in this evaluation is a solution in which polyvinylpyrrolidone is dissolved in a sports drink (commercially available product) and the viscosity is adjusted to 3 mmPa · s to make it easy to see by coloring it with red ink or the like. (2) Wet-back property: A doughnut-shaped (inner diameter 40 mm) weight was placed in the center of the delivery pad, 10 ml of pseudo blood was infused therein for 10 seconds, and the donut-shaped weight was removed and left for 1 minute. After that, a filter paper was placed, a weight was applied from above, and after standing for 1 minute, the amount (g) of pseudo blood returning to the filter paper was measured.

(3) Liquid flow area: A litter pad is placed on an acrylic plate inclined at 45 degrees, and 20 ml of pseudo blood is dropped from a position of 100 mm in height for 10 seconds. The length spread horizontally was measured and converted into an area (cm ² ). (4) Feeling of stuffiness: A wear test of the delivery pad was carried out by 10 monitors, and the feeling of stuffiness during wearing was sensory-evaluated and judged as follows. However, the first layer was used on the skin side. ○ More than 6 people answered that there was almost no stuffiness △ More than 6 people answered that there was some stuffiness × 6 people answered that there was very stuffiness (5) From the surface of the production pad after use Visibility of body fluids:
Wearing test of the delivery pad by 10 monitors was carried out, and the visibility of the body fluid from the surface material of the delivery pad after use was sensory-evaluated and judged as follows. However, the first layer was used on the skin side. ○ 6 or more people answered that body fluid absorption seems to be the same as actual △ 6 or more people answered that body fluid absorption seemed to be less than actual × 6 or more people answered that body fluid absorption seemed to be much smaller than actual did

Example 1 As the first layer, a regenerated cellulose nonwoven fabric made by Asahi Kasei Co., Ltd. under the trade name Benlyse SF184 (Basis weight: 18.5 g / m ² ) was used, and as the second layer, a mixed fiber of polypropylene (PP) and polyethylene (PE). (Mixing ratio (PP / PE) 60/4
0) is made into a non-woven fabric by the air-through method and the basis weight is 20 g / m
² and 0.4% by weight of polyglycerin fatty acid ester (decaglyceryl monolaurate) as a hydrophilic agent
The applied hydrophilic synthetic fiber nonwoven fabric was used. As the absorber, a pulp and a superabsorbent polymer wrapped in a tissue was used, and as the liquid-impermeable outer packaging, a liquid-impermeable backsheet made of polyethylene was used. These were laminated in order to produce an industrial pad. The composition of the delivery pad, performance evaluation using simulated blood, stuffiness when worn, and visibility of body fluid from the surface of the delivery pad after use were evaluated, and the results are shown in Table 1.

Example 2 In Example 1, as a second layer, PP fibers were made into a non-woven fabric by a spunbond method to give a basis weight of 20 g / m ² , to which polyglycerin fatty acid ester (decaglyceryl monolaurate) was added as a hydrophilic agent. A production pad was produced in the same manner as in Example 1 except that the hydrophilic synthetic nonwoven fabric provided with 0.3% by weight was used, and the performance evaluation results are shown in Table 1.

Example 3 Production was carried out in the same manner as in Example 2 except that as the first layer, rayon short fibers were made into a non-woven fabric by a spunlace method to have a basis weight of 40 g / m ² . Table 1 shows the results of evaluating the performance of the pad prepared in the same manner.

Comparative Example 1 In Example 1, as the second layer, rayon cotton 1
A production pad was prepared in the same manner as in Example 1 except that 0 g / m ² was used, and the performance evaluation results are shown in Table 1.

Comparative Example 2 The same as Example 2 except that as the second layer, a non-hydrophilic synthetic fiber nonwoven fabric was used in which the PP fiber was made into a nonwoven fabric by the spunbond method to have a basis weight of 20 g / m ^2. Table 1 shows the results of evaluation of the performance of the production pad produced in the same manner.

Comparative Example 3 In Example 2, as a first layer, PP fibers were made into a nonwoven fabric by a spunbond method to have a basis weight of 20 g / m ^2, and polyglycerin fatty acid ester (decaglyceryl monolaurate) was added as a hydrophilic agent. A production pad was produced in the same manner as in Example 2 except that the hydrophilic synthetic fiber nonwoven fabric provided with 0.3% by weight was used, and the results of performance evaluation in the same manner are shown in Table 1.
It was shown to.

[0024]

[Table 1]

From Table 1, the production pads obtained in Examples 1 to 3 were compared with those of Comparative Examples 1 to 3 in terms of liquid absorption rate, wet back property, liquid flow area, stuffiness, and absorption. It was confirmed that the body fluids were easy to see.

[0026]

EFFECTS OF THE INVENTION According to the body fluid absorber of the present invention, a nonwoven fabric containing cellulose fibers is used for the first layer on the skin surface side and a hydrophilized synthetic nonwoven fabric is used for the second layer. It has excellent wettability and wetback property, has no stuffiness, and the absorbed body fluid can be observed from the first layer side. Therefore, the liquid absorbent absorber of the present invention is particularly effective in diagnosing the postpartum process in hospitals and the like.

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Claims (4)

[Claims] 1. A first layer made of a nonwoven fabric containing cellulose fibers, a second layer made of a hydrophilized synthetic fiber nonwoven fabric, a third layer made of an absorbent body, and a fourth layer made of a liquid impermeable exterior material. A body fluid absorber comprising a layered body in which layers are sequentially stacked, and the body fluid absorbed from the first layer is seen through the first layer side. 2. The body fluid absorber according to claim 1, wherein the liquid absorption rate using simulated blood is 80 seconds or less and the wet back property is 1.0 g or less. 3. The bodily fluid absorbent body according to claim 1, wherein the amount of the hydrophilic agent attached to the hydrophilized synthetic fiber nonwoven fabric is 10% by weight or less. 4. The body fluid absorber according to claim 1, wherein the nonwoven fabric containing the cellulose fibers is a regenerated cellulose long fiber nonwoven fabric.