JPH0728891B2 - Absorbent article - Google Patents
Absorbent articleInfo
- Publication number
- JPH0728891B2 JPH0728891B2 JP62080089A JP8008987A JPH0728891B2 JP H0728891 B2 JPH0728891 B2 JP H0728891B2 JP 62080089 A JP62080089 A JP 62080089A JP 8008987 A JP8008987 A JP 8008987A JP H0728891 B2 JPH0728891 B2 JP H0728891B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- absorbent
- liquid
- polymer
- composite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は吸収性物品に関し、詳しくは、（Ａ）吸水性ポ
リマー、（Ｂ）水不溶性無機物質及び（Ｃ）水不溶性親
水性繊維状物質からなる吸液性複合体を含有をすること
を特徴とする、生理用ナプキン、使い捨ておむつ、母乳
パッド、産褥用パッド、失禁者用パッド、痔用パッド、
外科用パッド等の体液吸収性物質に関する。TECHNICAL FIELD The present invention relates to an absorbent article, and more specifically, to (A) a water-absorbing polymer, (B) a water-insoluble inorganic substance, and (C) a water-insoluble hydrophilic fibrous substance. Characterized by containing a liquid-absorbent complex consisting of, sanitary napkin, disposable diapers, breast pads, puerperium pads, incontinence pads, hemorrhoid pads,
The present invention relates to a body fluid absorbent substance such as a surgical pad.
従来から吸収性物品の吸収特性の向上を目的とした研究
が数多く行われ、数多くの成果が報告されている。Many studies have been conducted so far for the purpose of improving the absorption characteristics of absorbent articles, and many results have been reported.
その目標の大半は吸収速度の向上及び吸液後に吸収体か
ら表面に液が戻るのを阻止し、表面でのベタツキを低減
することなどである。Most of the goals are to improve the absorption rate, prevent the liquid from returning from the absorber to the surface after absorbing the liquid, and reduce the stickiness on the surface.
その具体的な例を挙げると、先ず表面材に関する研究と
しては、従来一般に使用されていたレーヨンステープル
が親水性材であるため表面のベタツキがあった。これを
疎水性素材、例えばポリプロピレンステープル、ポリエ
ステルステープル等に変更することで表面のベタツキを
低減させる提案がなされている。To give a concrete example, first of all, regarding the research on the surface material, there was stickiness on the surface because rayon staple which has been generally used conventionally is a hydrophilic material. It has been proposed to change this to a hydrophobic material such as polypropylene staple or polyester staple to reduce the stickiness of the surface.
又、吸収体用素材としても、従来の吸収紙や綿状パルプ
の吸収後の保持力が小さい点を改善した高分子吸収材
（高吸収性ポリマー）を応用することで吸収容量を向上
させ、同時に吸収後の表面材への液戻りを阻止すること
が提案されている。Further, as a material for the absorbent body, the absorption capacity is improved by applying a polymer absorbent material (super absorbent polymer) which is improved in that the holding power after absorption of conventional absorbent paper or cotton-like pulp is small, At the same time, it has been proposed to prevent liquid return to the surface material after absorption.
しかしながら従来の高吸水性ポリマーは水や尿といった
低粘性、低イオン強度溶液に対する吸収性は優れるが、
血液や膿、軟便等に代表される高粘性溶液に対する吸収
性は悪く、吸水性ポリマーを吸収体中に含有させても殆
ど効果を示さないのが現状である。また、この様な高粘
性液に対する吸収性能を改善する目的でポリマーの多孔
質化（特開昭59−8711号公報）や有機かつ／または無機
の水溶性塩の添加（特公表昭58−501107号公報）、パル
プ等の親水性繊維との混合（特開昭59−86657号公報）
等が提案されているがまだまだその効果は十分とは言い
難い。However, conventional superabsorbent polymers have excellent absorbency for low viscosity, low ionic strength solutions such as water and urine,
Absorbability for highly viscous solutions represented by blood, pus, loose stools, etc. is poor, and even if a water-absorbing polymer is contained in the absorber, almost no effect is exhibited at present. Further, for the purpose of improving the absorption performance for such a highly viscous liquid, the polymer is made porous (JP-A-59-8711) and an organic and / or inorganic water-soluble salt is added (JP-A-58-501107). No.), mixing with hydrophilic fibers such as pulp (Japanese Patent Laid-Open No. 59-86657).
Etc. have been proposed, but the effect is still far from sufficient.
従って、高粘性液に対しても優れた吸収性を示す吸収性
物品の出現が待ち望まれる。Therefore, the emergence of absorbent articles that exhibit excellent absorbency even for highly viscous liquids has been awaited.
そこで本発明者らは、血液等の高粘性液体に対しても優
れた吸収性を有する吸収性物品を得るべく鋭意検討した
結果、本発明を完成するに至った。Therefore, as a result of intensive investigations by the present inventors to obtain an absorbent article having excellent absorbability even for a highly viscous liquid such as blood, the present invention has been completed.
即ち、本発明は、（Ａ）吸水性ポリマー、（Ｂ）水不溶
性無機物質、および（Ｃ）水不溶性親水性繊維状物質か
らなる吸液性複合体であり、かつその複合比（重量比）
が（Ａ）：（Ｂ）：（Ｃ）＝100:5〜1200:5〜1200であ
る吸液性複合体を含有することを特徴とする吸収性物品
を提供するものである。That is, the present invention is a liquid-absorbent composite comprising (A) a water-absorbent polymer, (B) a water-insoluble inorganic substance, and (C) a water-insoluble hydrophilic fibrous substance, and its composite ratio (weight ratio).
(A) :( B) :( C) = 100: 5 to 1200: 5 to 1200 is contained, The absorbent article characterized by containing is contained.
本発明に係わる吸液性複合体は、特定量の水不溶性無機
物質と、水不溶性親水性を示す繊維状物質を吸水性ポリ
マーに添加し、且つ固定化する事により得られるもので
あり、従来にない優れた吸収性能を持つものである。The liquid-absorbent composite according to the present invention is obtained by adding a specific amount of a water-insoluble inorganic substance and a fibrous substance showing water-insoluble hydrophilicity to a water-absorbing polymer and immobilizing it. It has an excellent absorption performance not found in other products.
本発明において使用される吸水性ポリマーとしては、一
般に吸収性を有するポリマーであればいずれでも良く、
例えばポリ（メタ）アクリル酸またはその塩を主成分と
し、場合により架橋剤を添加してなる水溶性のエチレン
性不飽和ポリマーの他、ポリエチレンオキシド、ポリビ
ニルピロリドン、スルホン化ポリスチレン及びポリビニ
ルピリジンの架橋物、デンプン−ポリ（メタ）アクリロ
ニトリルグラフト共重合体のケン化物、デンプン−ポリ
（メタ）アクリル酸（及びその塩）グラフト共重合物
（及びその架橋物）、デンプン−ポリ（メタ）アクリル
エステルグラフト共重合物（及びその架橋物）、デンプ
ン−ポリ（メタ）アクリルエステルグラフト共重合物の
加水分解物などが挙げられる。又、ポリビニルアルコー
ルスルホン酸塩、ポリビニルアルコール−アクリル酸グ
ラフト共重合物なども例示できる。好ましくは、アクリ
ル酸またはアクリル酸塩を主成分とする水溶性エチレン
性不飽和単量体の重合体またはその架橋物であり、その
製造法は何れでもよい。The water-absorbing polymer used in the present invention may be any polymer as long as it generally has absorbency,
For example, a cross-linked product of polyethylene oxide, polyvinyl pyrrolidone, sulfonated polystyrene and polyvinyl pyridine, in addition to a water-soluble ethylenically unsaturated polymer containing poly (meth) acrylic acid or a salt thereof as a main component and optionally a cross-linking agent added. Saponified starch-poly (meth) acrylonitrile graft copolymer, starch-poly (meth) acrylic acid (and its salt) graft copolymer (and its cross-linked product), starch-poly (meth) acrylic ester graft copolymer Examples thereof include polymers (and crosslinked products thereof) and hydrolyzates of starch-poly (meth) acrylic ester graft copolymers. Further, polyvinyl alcohol sulfonate, polyvinyl alcohol-acrylic acid graft copolymer, etc. can be exemplified. Preferred is a polymer of a water-soluble ethylenically unsaturated monomer containing acrylic acid or an acrylic acid salt as a main component or a crosslinked product thereof, and any method for producing the polymer may be used.
これらのポリマーは、二種以上用いてもよい。Two or more kinds of these polymers may be used.
吸水性ポリマーは20ml/g以上の水を吸収するポリマーで
あって、形状としては粉末状、顆粒状、塊状、シート状
などの形態があり、本発明の複合体を製造するには、そ
の何れも使用可能である。粉末状、顆粒状の場合、粒子
径は10〜3000μｍ、好ましくは15〜1000μｍのものが良
い。The water-absorbent polymer is a polymer that absorbs 20 ml / g or more of water, and has a shape such as powder, granules, lumps, and sheets, and any one of them can be used to produce the composite of the present invention. Can also be used. In the case of powder or granule, the particle size is 10 to 3000 μm, preferably 15 to 1000 μm.
本発明で用いられる無機物質としては、実質的に水に不
溶であることを必須条件とし、これを満足するものであ
れば何れでも良い。具体的には、例えばアルミナ、シリ
カ、二酸化チタン、タルク、ジルコニア、リン酸カルシ
ウム、リン酸バリウム、硫酸カルシウム、粘土、ケイ
酸、珪藻土、ベントナイト、活性炭、ゼオライト、カオ
リナイト、カオリン、酸性白土、活性白土、バーミュキ
ュライト、その他金属酸化物等の粉末が挙げられる。特
に、アルミナ、シリカ、ゼオライト、モンモリロナイト
族粘度（ベントナイト）、カオリナイト族粘土（カオリ
ン）が好ましい。The inorganic substance used in the present invention is essentially insoluble in water, and any substance may be used as long as it satisfies this condition. Specifically, for example, alumina, silica, titanium dioxide, talc, zirconia, calcium phosphate, barium phosphate, calcium sulfate, clay, silicic acid, diatomaceous earth, bentonite, activated carbon, zeolite, kaolinite, kaolin, acid clay, activated clay, Examples include powders of vermiculite and other metal oxides. In particular, alumina, silica, zeolite, montmorillonite group viscosity (bentonite), and kaolinite group clay (kaolin) are preferable.
水不溶性無機物質の粒子径は特に限定されないが、1500
μｍ以下のものであれば好ましく用いられ、特に500μ
ｍ以下のものが好ましく用いられる。The particle size of the water-insoluble inorganic substance is not particularly limited, but is 1500
If it is less than μm, it is preferably used, especially 500 μm
Those of m or less are preferably used.
水不溶性親水性繊維状物質としては、水不溶性親水性繊
維状物質特有の濡れ性、導液性を具備したセルロース、
パルプ、レーヨン、ビニロン、綿、羊毛、及びアセテー
ト等が挙げられ、特に、セルロース、パルプ、レーヨン
の使用が好ましい。また、拡散性及び熱融着による固定
化等の機能を付与させる目的で疎水性繊維状物質である
ポリエステル、ポリエチレン、ポリプロピレン、ポリ塩
化ビニル、アクリル、ナイロン等もこれらの水不溶性親
水性繊維状物質とともに利用できる。疎水性繊維状物質
は、親水性を損なわない限り用途により大きな範囲で混
合比率を変えることができるが、水不溶性親水性繊維状
物質は60重量％以上、好ましくは、80重量％以上の使用
が望ましい。これらの形態は、長繊維から短繊維まで、
まだ、微粉化したもののいずれでもよい。繊維長は50mm
以下、好ましくは40mm以下が望ましい。As the water-insoluble hydrophilic fibrous substance, cellulose having wettability and liquid-conducting property peculiar to the water-insoluble hydrophilic fibrous substance,
Pulp, rayon, vinylon, cotton, wool, acetate and the like can be mentioned, with cellulose, pulp and rayon being particularly preferable. In addition, hydrophobic fibrous substances such as polyester, polyethylene, polypropylene, polyvinyl chloride, acryl and nylon, which are used for the purpose of imparting functions such as diffusivity and fixation by heat fusion, are also water-insoluble hydrophilic fibrous substances. Available with The mixing ratio of the hydrophobic fibrous substance can be varied within a wide range depending on the application as long as the hydrophilicity is not impaired, but the water-insoluble hydrophilic fibrous substance is used in an amount of 60% by weight or more, preferably 80% by weight or more. desirable. These forms, from long fibers to short fibers,
Still, any of finely divided powder may be used. Fiber length is 50 mm
The following is desirable, and preferably 40 mm or less.
吸水性ポリマー、水不溶性無機物質、水不溶性親水性繊
維状物質の複合比は、吸水性ポリマー100重量部に対し
て、水不溶性無機物質５〜1200重量部、水不溶性親水性
繊維状物質５〜1200重量部であり、好ましくは水不溶性
無機物質10〜800重量部、水不溶性親水性繊維状物質10
〜1000重量部、更に好ましくは水不溶性無機物質20〜50
0重量部、水不溶性親水性繊維状物質20〜800重量部であ
る。これらの構成成分の何れかが欠けても本発明の効果
は認められず、本発明の意図するところではない。水不
溶性無機物質の含量は、５重量部未満では吸水性ポリマ
ーの被液吸収速度、吸収力が小さく好ましくない。また
1200重量部を超えると複合体の被液吸収量が小さくなる
他、ポリマーに固定化されず本発明の目的を達成するこ
とができない。The composite ratio of the water-absorbent polymer, the water-insoluble inorganic substance, and the water-insoluble hydrophilic fibrous substance is 5 to 1200 parts by weight of the water-insoluble inorganic substance and 5 to 100 parts by weight of the water-insoluble hydrophilic fibrous substance. 1200 parts by weight, preferably 10 to 800 parts by weight of water-insoluble inorganic substance, 10 water-insoluble hydrophilic fibrous substance
~ 1000 parts by weight, more preferably water-insoluble inorganic material 20-50
0 parts by weight, 20 to 800 parts by weight of water-insoluble hydrophilic fibrous substance. The effect of the present invention is not recognized even if any of these constituent components is lacking, which is not the intention of the present invention. When the content of the water-insoluble inorganic substance is less than 5 parts by weight, the liquid-absorbent polymer has a low liquid absorption rate and absorbency, which is not preferable. Also
If the amount exceeds 1200 parts by weight, the amount of the complex absorbed by the liquid becomes small and the complex is not immobilized on the polymer, so that the object of the present invention cannot be achieved.
水不溶性親水性繊維状物質においては、含量が５重量部
未満のとき、吸水性ポリマーの導液性、被液吸収速度、
拡散性が小さく、1200重量部を超えると吸水性ポリマー
の被液吸収量が小さくなり本発明の目的を達成すること
ができない。In the water-insoluble hydrophilic fibrous substance, when the content is less than 5 parts by weight, the liquid-conducting property of the water-absorbing polymer, the liquid absorption rate,
The diffusivity is small, and when it exceeds 1200 parts by weight, the amount of the water-absorbent polymer absorbed by the liquid becomes small and the object of the present invention cannot be achieved.
水不溶性無機物質と水不溶性親水性繊維状物質の複合比
は、被吸収液の種類や用途に応じ、適宜上記の範囲内に
おいて自由に変化させることが出来る。The composite ratio of the water-insoluble inorganic substance and the water-insoluble hydrophilic fibrous substance can be freely changed within the above range depending on the type and application of the liquid to be absorbed.
本発明に係わる吸液性複合体を製造する方法としては、
公知の方法が用いられるが、以下の方法によって好まし
く製造される。すなわち、吸水性ポリマーを十分膨潤さ
せた状態で水不溶性無機物質及び水不溶性親水性繊維状
物質を添加する方法が挙げられる。たとえば、ニーダ混
合器に膨潤ポリマーと水不溶性無機物質及び水不溶性親
水性繊維状物質を加え、混合後乾燥する方法、有機溶媒
中に吸水性ポリマー、水、水不溶性無機物質、水不溶性
親水性繊維状物質を撹拌しながら順次添加し、混合後濾
別乾燥する方法、スクリュー回転羽根式混合器に、水不
溶性無機物質と水を混合した後、吸水性ポリマーと水不
溶性親水性繊維状物質を順次加え、混合後乾燥する方法
等が挙げられる。また、水溶性エチレン性不飽和モノマ
ー又は一部架橋剤を含む水溶性エチレン性不飽和モノマ
ーに、水不溶性無機物質、水不溶性親水性繊維状物質を
添加した後、重合、乾燥する方法等も用いられ、これら
の製造方法は特に限定されるものではない。また、乾燥
後得られた吸液性複合体は、必要に応じ粉砕の処理を行
うことも可能である。本発明の吸液性複合体は、このよ
うに製造されたものでは嵩比重が0.03〜0.7g/ccであ
り、好ましいものは、0.05〜0.6g/ccである。嵩比重が
0.03g/cc未満の複合体は、嵩高くなり過ぎて取り扱いに
くくなり、0.7g/ccを超えるものでは、目的とする吸収
性能は得られない。The method for producing the liquid-absorbent composite according to the present invention includes:
Although a known method is used, it is preferably produced by the following method. That is, a method of adding a water-insoluble inorganic substance and a water-insoluble hydrophilic fibrous substance in a state where the water-absorbent polymer is sufficiently swollen. For example, a method of adding a swelling polymer, a water-insoluble inorganic substance and a water-insoluble hydrophilic fibrous substance to a kneader mixer, followed by mixing and drying, a water-absorbing polymer in an organic solvent, water, a water-insoluble inorganic substance, a water-insoluble hydrophilic fiber. Of water-insoluble inorganic substance and water in a screw rotary blade mixer, and then water-absorbing polymer and water-insoluble hydrophilic fibrous substance in order In addition, a method of drying after mixing may be mentioned. Further, a method of adding a water-insoluble inorganic substance or a water-insoluble hydrophilic fibrous substance to a water-soluble ethylenically unsaturated monomer or a water-soluble ethylenically unsaturated monomer containing a partial cross-linking agent, and then polymerizing and drying it is also used. However, these manufacturing methods are not particularly limited. Further, the liquid-absorbent composite obtained after drying can be pulverized if necessary. The liquid-absorbent composite of the present invention thus produced has a bulk specific gravity of 0.03 to 0.7 g / cc, preferably 0.05 to 0.6 g / cc. Bulk specific gravity
A composite of less than 0.03 g / cc becomes too bulky and difficult to handle, and a composite of more than 0.7 g / cc cannot obtain the intended absorption performance.
本発明の吸液性複合体の（Ａ）吸水性ポリマー、（Ｂ）
水不溶性無機物質、および（Ｃ）水不溶性親水性繊維状
物質の複合化の状態は、以下のようなものである。(A) Water-absorbent polymer of the absorbent composite of the present invention, (B)
The composite state of the water-insoluble inorganic substance and (C) the water-insoluble hydrophilic fibrous substance is as follows.
即ち、水不溶性親水性繊維状物質及び水不溶性無機物質
は吸水性ポリマーに以下のような状態で複合化されてい
る。That is, the water-insoluble hydrophilic fibrous substance and the water-insoluble inorganic substance are combined with the water-absorbent polymer in the following state.
＜水不溶性親水性繊維状物質＞ ポリマーに繊維が部分的に又は完全に埋め込まれて
いる。<Water-insoluble hydrophilic fibrous substance> Fibers are partially or completely embedded in the polymer.
ポリマー表面に繊維が付着している。 Fibers are attached to the polymer surface.
繊維同志が絡み合っており、繊維の一部がポリマー
に埋まっているか、ポリマー表面に付着している。The fibers are intertwined with each other, and some of the fibers are embedded in the polymer or attached to the polymer surface.
＜水不溶性無機物質＞ ポリマーに無機物質が部分的に又は完全に埋め込ま
れている。<Water-insoluble inorganic substance> The inorganic substance is partially or completely embedded in the polymer.
ポリマー表面に無機物質が付着している。 Inorganic substances are attached to the polymer surface.
前記の＜繊維状物質＞〜の繊維に無機物質が付
着している。An inorganic substance is attached to the fibers of the above <fibrous substance>.
無機物質同志が凝集しており、無機物質の一部分が
ポリマーに埋め込まれているか、又はポリマー表面に付
着している。The inorganic substances are agglomerated, and some of the inorganic substances are embedded in the polymer or attached to the polymer surface.
本発明において、（Ａ）吸水性ポリマー、（Ｂ）水不溶
性無機物質、および（Ｃ）水不溶性親水性繊維状物質の
複合化の状態の例として上記のようなものが挙げられる
が、本発明はこれらに限定されるものではなく、
（Ａ），（Ｂ），（Ｃ）の三者が実質的に複合化されて
いれば良い。In the present invention, examples of the composite state of (A) the water-absorbent polymer, (B) the water-insoluble inorganic substance, and (C) the water-insoluble hydrophilic fibrous substance include those described above. Is not limited to these,
It is sufficient that the three components (A), (B), and (C) are substantially combined.
本発明における吸液性複合体中に水不溶性無機物質と水
不溶性親水性繊維状物質による吸液性の向上は、特に高
粘性液体の場合著しい効果が認められたがその作用は以
下のようにして発揮したものと考えられる。In the liquid-absorbent composite of the present invention, the water-insoluble inorganic substance and the water-insoluble hydrophilic fibrous substance in the liquid-absorbent composite have an improved liquid-absorption property, and in the case of a highly viscous liquid, a remarkable effect was observed, but the action is as follows. It is thought that it was demonstrated.
吸水性ポリマーを水不溶性親水性繊維状物質が被覆して
いるため、水溶液とのなじみが良好となり、さらに液が
ポリマーに接触しない場合でも、液が吸水性ポリマーを
被覆している水不溶性親水性繊維状物質に接触さえすれ
ば、繊維の導液効果によりポリマーまで液を運び、ポリ
マーは膨潤することができる。Since the water-absorbent polymer is coated with the water-insoluble hydrophilic fibrous substance, the compatibility with the aqueous solution is good, and even when the liquid does not come into contact with the polymer, the liquid coats the water-absorbent polymer with the water-insoluble hydrophilic property. As long as it comes into contact with the fibrous substance, the liquid can be carried to the polymer by the liquid guiding effect of the fiber, and the polymer can swell.
本発明に用いられている無機物質としては、実質的に水
に不溶で、ある程度の吸湿性を有しているものが望まし
く、この無機物質は、ポリマー中に一部含有される。こ
れは、水に不溶な無機物質であるため、塩の影響が少な
く、また、密な無機物粒子被覆特有の毛管現象により、
吸水性ポリマーの被液吸収性能を活性化させていると考
えられる。The inorganic substance used in the present invention is preferably one that is substantially insoluble in water and has a certain degree of hygroscopicity, and this inorganic substance is partially contained in the polymer. This is an inorganic substance that is insoluble in water, so there is little effect of salt, and due to the capillary phenomenon peculiar to the dense inorganic particle coating,
It is considered that the liquid absorbing ability of the water absorbent polymer is activated.
これら水不溶性無機物質、水不溶性親水性繊維状物質の
どちらか一方と吸水性ポリマーとの複合体においては、
吸液性能に大きな向上が望めず、吸水性ポリマーを含め
た三者を複合化することにより性能の向上が発現するも
のと考える。In the composite of either the water-insoluble inorganic substance or the water-insoluble hydrophilic fibrous substance and the water-absorbing polymer,
It cannot be expected that the liquid absorption performance will be greatly improved, and it is considered that the improvement of the performance will be realized by combining the three materials including the water-absorbing polymer.
本発明に係わる上記吸液性複合体は、それのみでは十分
な吸収体となり得ず、他の綿状もしくはシート状物と組
み合せる事により初めて本来の機能を発揮しうる。The liquid-absorbent composite according to the present invention cannot be a sufficient absorbent by itself, and can exhibit its original function only when it is combined with other cotton-like or sheet-like materials.
即ち、上記吸液性複合体は、繊維集合体が形成する毛管
構造体に組み入れられる事によりはじめて繊維集合体が
有する保液空間、液の拡散性、形態保持能力を合せ持つ
事が出来るものである。That is, the above-mentioned liquid-absorbent composite can not only have the liquid-retaining space, the liquid diffusibility, and the shape-retaining ability of the fiber assembly until it is incorporated into the capillary structure formed by the fiber assembly. is there.
吸液性複合体と組み合わせる素材は、液を吸収、拡散、
保持する能力を有するものが好ましく、具体的には、パ
ルプ、レーヨン、コットン等のセルロース系親水性繊維
の他、親水性処理を施したポリエステル、ビニロン、繊
維表面に多数の微細孔を有するアルリル繊維等が挙げら
れる。The material combined with the liquid-absorbent composite absorbs and diffuses liquid,
Those having the ability to retain are preferable, and specifically, in addition to cellulosic hydrophilic fibers such as pulp, rayon, and cotton, hydrophilically treated polyester, vinylon, and aryl fibers having numerous fine pores on the fiber surface. Etc.
これは非常に高い親水性を有するので繊維集合体内部に
液を迅速拡散する能力を有し、強い毛管力により液をし
っかりと保持する事ができる。Since it has very high hydrophilicity, it has the ability to rapidly diffuse the liquid inside the fiber assembly, and can firmly hold the liquid by a strong capillary force.
即ち、これらの繊維は液を吸収し、それを拡散させる事
により、有効に吸液性複合体に液を運んでいき、複合体
がその液を吸い切るまでの間、液を保持しておく機能を
果たすものである。That is, these fibers absorb the liquid and diffuse it to effectively convey the liquid to the liquid-absorbent composite, and hold the liquid until the composite absorbs the liquid. It fulfills its function.
また上記の様なセルロース系親水性繊維以外にも、乾湿
強力比の高いポリエチレン、ポリプロピレン、ポリエス
テル、ポリエチレン−ポリプロピレン複合繊維等の合成
繊維の使用も可能であり、これらを用いる事により吸液
時においても吸収体の構造安定性が高まる為、吸収体の
ヨレ、ヘタリを防止する事が出来る。In addition to the cellulose-based hydrophilic fibers as described above, it is also possible to use synthetic fibers such as polyethylene, polypropylene, polyester, polyethylene-polypropylene composite fibers having a high dry-wet strength ratio. Since the structural stability of the absorber is enhanced, it is possible to prevent the absorber from being twisted or settled.
即ち、上記両者の繊維を必要に応じて組み合わせる事に
より吸収体のパーフォーマンスはより高まる事になるの
は明白である。That is, it is obvious that the performance of the absorbent body can be further enhanced by combining the above two fibers as needed.
次に本発明の吸収性物品の種々実施態様を第１図の横断
面図に基づき説明するが、本発明がこれらに限定される
ものでない事は言うまでもない。Next, various embodiments of the absorbent article of the present invention will be described based on the cross-sectional view of FIG. 1, but it goes without saying that the present invention is not limited to these.
第１図（ａ）は本発明に係わるシート状吸収体であり、
紙または不織布３上に吸液性複合体４を均一に散布し、
その上にもう１枚の紙または不織布３′を重ねた後、少
量の水を霧状に散布するか、水蒸気をかけて乾燥させ、
上下の紙または不織布3,3′が一旦濡れた吸液性複合体
４によって接着して、柔軟性の良いシート状吸収体が得
られる。吸液性複合体４の散布量は10g/m2ないし300g/m
2が好ましく、更に好ましくは30g/m2ないし150g/m2であ
る。FIG. 1 (a) shows a sheet-shaped absorber according to the present invention,
Disperse the absorbent composite 4 evenly on the paper or nonwoven fabric 3,
After stacking another piece of paper or non-woven fabric 3'on top of it, spray a small amount of water in a mist form or apply steam to dry it.
The upper and lower papers or the non-woven fabrics 3, 3'are adhered to each other by the wet absorbent composite 4 to obtain a sheet-like absorbent body having good flexibility. The amount of the absorbent composite 4 sprayed is 10 g / m 2 or 300 g / m
2 is preferable, and more preferably 30 g / m 2 to 150 g / m 2 .
第１図（ｂ）は本発明に係わるシート状吸収体の別の実
施態様を示すものであり、粉砕パルプ又はセルロース粉
末５と吸液性複合体４を混合し、シート状にし、その上
下は紙又は不織布３ではさみ、端は接着して封じること
によって高柔軟性のシート状吸収体となる。FIG. 1 (b) shows another embodiment of the sheet-shaped absorbent body according to the present invention, in which crushed pulp or cellulose powder 5 and the liquid-absorbent composite 4 are mixed to form a sheet, and the upper and lower sides thereof are By sandwiching the paper or the non-woven fabric 3 with the scissors and the edges, the sheet-like absorbent body having high flexibility is obtained.
第１図（ｃ）は本発明の吸収性物品の一実施例を示す横
断面図であり、台紙６上に積繊した粉砕パルプ層５上に
吸液性複合体４を均一に散布し、更にその上に粉砕パル
プ５を積繊し、更に台紙６を載せて、全体を下側は防水
シート２、上側は不織布１で包むことによって得られ
る。この時、吸液性複合体４と粉砕パルプ層５の間に紙
又は不織布３を置いてもよい。この構造は主に紙おむつ
に適する。FIG. 1 (c) is a cross-sectional view showing an embodiment of the absorbent article of the present invention, in which the liquid-absorbent composite 4 is evenly dispersed on the crushed pulp layer 5 stacked on the mount paper 6, Further, it is obtained by stacking crushed pulp 5 on it, placing a backing sheet 6 thereon, and wrapping the whole with a waterproof sheet 2 on the lower side and a nonwoven fabric 1 on the upper side. At this time, paper or nonwoven fabric 3 may be placed between the liquid-absorbent composite 4 and the crushed pulp layer 5. This structure is mainly suitable for disposable diapers.
第１図（ｄ）は本発明の吸収性物品の別の実施例を示す
横断面図であり、台紙６上に積繊した粉砕パルプ５上に
吸液性複合体４を均一に散布し、クレープ紙７を１枚な
いし10枚、好ましくは３枚ないし６枚積層し、クレープ
紙７側に防水シート２、粉砕パルプ側にレーヨンステー
プル綿８を積層し、全体を不織布１で包むことにより得
られる。この構造は主に生理用ナプキンに適する。FIG. 1 (d) is a cross-sectional view showing another embodiment of the absorbent article of the present invention, in which the liquid-absorbent composite 4 is uniformly sprayed on the crushed pulp 5 stacked on the mount paper 6, Obtained by laminating 1 to 10 sheets, preferably 3 to 6 sheets of crepe paper 7, laminating the waterproof sheet 2 on the crepe paper 7 side and rayon staple cotton 8 on the crushed pulp side, and wrapping the whole with nonwoven fabric 1. To be This structure is mainly suitable for sanitary napkins.
本発明の吸収性物品は、（Ａ）吸水性ポリマー、（Ｂ）
水不溶性無機物質、及び（Ｃ）水不溶性親水性繊維状物
質からなる吸液性複合体を含有する吸収性物品であり、
従来では吸収、保持が困難であった血液や膿、軟便等に
代表される高粘性液体に対して優れた吸収、保持性能を
有するものであり、主としてこれらの液が吸収、保持さ
れない為に生じる表面のべとつき感及び横もれを著しく
減少させるものである。The absorbent article of the present invention comprises (A) a water-absorbent polymer, (B)
An absorbent article comprising a water-insoluble inorganic substance and (C) a liquid-absorbent composite comprising a water-insoluble hydrophilic fibrous substance,
It has excellent absorption and retention performance for highly viscous liquids such as blood, pus, and loose feces that were difficult to absorb and retain in the past, and is mainly caused by these liquids not being absorbed and retained. It significantly reduces the sticky feeling and the side leakage of the surface.
次に実施例により、本発明の吸収性物品の構造及び吸収
性能について更に詳細に説明するが本発明がこれら実施
例のみに限定されるものでない事は言うまでもない。Next, the structure and the absorption performance of the absorbent article of the present invention will be described in more detail with reference to Examples, but it goes without saying that the present invention is not limited to these Examples.
また本発明は、高粘性液体の吸収性に優れた吸収性物品
に関するものであるが、基本的に同様な考え方が可能な
為、以下吸収性物品の代表例として生理用ナプキンを用
いた実施例について更に詳細に説明する。Further, the present invention relates to an absorbent article excellent in absorbability of a high-viscosity liquid, but since basically the same idea is possible, an example using a sanitary napkin as a representative example of the absorbent article is described below. Will be described in more detail.
なお吸液性複合体の飽和吸収量、吸収速度、吸収力、及
び本発明の吸収性物品の効果を示す液戻り量及び動的最
大吸収量の測定は以下の方法により行った。The saturated absorption amount, absorption rate, absorption capacity of the liquid-absorbent composite, and the liquid return amount and dynamic maximum absorption amount showing the effect of the absorbent article of the present invention were measured by the following methods.
また低粘性流体の代表例として生理食塩水、高粘性流体
の代表例として血液を用いた。Further, physiological saline was used as a representative example of the low-viscosity fluid, and blood was used as a representative example of the high-viscosity fluid.
（１） 飽和吸収量 乾燥した吸液性複合体を十分な量の馬血（脱繊維、発売
元（株）日本生物材料センター）又は生理食塩水に浸漬
し、30分間放置した。その後吸引濾過（濾紙No.2、直径
125mm）し、重量を測定した。同様の操作を吸液性複合
体のない系（即ち濾紙のみ）について行い重量を測定し
た。これらより以下に示す式により吸液性複合体の飽和
吸収量を求めた。(1) Saturated absorption amount The dried liquid-absorbent complex was dipped in a sufficient amount of horse blood (defiberized, Japan Biomaterials Center, Publisher, Japan) or physiological saline, and allowed to stand for 30 minutes. Then suction filtration (filter paper No. 2, diameter
125 mm) and weighed. The same operation was performed on the system without the liquid-absorbent complex (that is, only the filter paper), and the weight was measured. From these, the saturated absorption amount of the liquid-absorbent composite was determined by the following formula.
W:吸液性複合体中の吸水性ポリマー（Ａ）の重量（ｇ） W1:吸液後の吸液性複合体の重量（ｇ） W0:吸液後の濾紙の重量（ｇ） （２−１）吸収速度（ａ） 第３図に示す装置を用い吸収速度を測定する。ビュレッ
トの上口12に栓をし、測定台13と空気口14を等高位にセ
ットする。測定台中の直径10mmのガラスフィルター（N
o.1）15上に吸液性複合体４を0.3g乗せ、その後20分間
に吸収した馬脱繊維血の値を吸収速度（ａ）として表し
た。 W: Weight of water-absorbent polymer (A) in the absorbent composite (g) W 1 : Weight of absorbent composite after absorbing liquid (g) W 0 : Weight of filter paper after absorbing liquid (g) (2-1) Absorption rate (a) The absorption rate is measured using the apparatus shown in FIG. The upper port 12 of the buret is plugged, and the measuring table 13 and the air port 14 are set at a constant height. Glass filter with a diameter of 10 mm (N
o.1) 0.3 g of the liquid-absorbent composite 4 was placed on 15 and the value of horse defibrinated blood absorbed for 20 minutes thereafter was expressed as the absorption rate (a).
（２−２）吸収速度（ｂ） （２−１）吸収速度（ａ）の測定と同様の実験法で、吸
水性ポリマー（Ａ）を0.3g固定した吸液性複合体が１分
間に吸収した生理食塩水の値を吸収速度（ｂ）として表
わした。(2-2) Absorption rate (b) (2-1) By the same experimental method as the measurement of the absorption rate (a), the absorbent composite having 0.3 g of the water-absorbing polymer (A) fixed thereon absorbs in 1 minute. The value of the physiological saline solution was expressed as the absorption rate (b).
（３） 吸収力 吸液性複合体0.05gにスポイトで馬脱繊維血又は生理食
塩水を0.5ccたらし、吸収具合いを目視にて観察し、４
段階にて表した。(3) Absorbency To 0.05 g of the liquid-absorbent complex, 0.5 cc of horse defibrinated blood or physiological saline was dropped with a dropper to visually observe the absorption condition.
Expressed in stages.
（４） 液戻り量 試験サンプルに疑似血液10gを注入し、これに50g/cm2の
圧をかけた時に逆戻りした液をろ紙で吸い取り、この重
量を液戻り量とした。 (4) Liquid return amount 10 g of pseudo blood was injected into a test sample, and the liquid that had returned when a pressure of 50 g / cm 2 was applied was absorbed by a filter paper, and this weight was used as the liquid return amount.
（５） 動的最大吸収量 第２図（ａ）に示す如く、可動式女性腰部モデル９に、
（ｂ）に示すように試験サンプル11を装着させ、ショー
ツをはかせた後、50m/minに相当する速度で歩行運動を
させながら滴下用チューブ10により疑似血液を注入し、
横もれを生じるまでに吸収した量を測定した。(5) Dynamic maximum absorption amount As shown in Fig. 2 (a), the movable female waist model 9
After attaching the test sample 11 as shown in (b) and putting on the shorts, pseudo blood was injected by the dropping tube 10 while walking at a speed corresponding to 50 m / min.
The amount absorbed up to the occurrence of lateral leakage was measured.
実施例−１ 吸水性ポリマー（Ａ）としてポリアクリル酸ナトリウム
20g、イオン交換水100g、水不溶性無機物質（Ｂ）とし
てベントナイト10g、及び水不溶性親水性繊維状物質
（Ｃ）としてセルロースパウダー（Whatman社製CF11、
繊維長〜500μｍ）10gとを双軸ニーダーを用い、約10分
間混練後80℃で減圧乾燥する事により、吸液性複合体を
得た。これを電子顕微鏡で確認したところ、ベントナイ
ト及びセルロースパウダーが吸水性ポリマーの表面に固
定化した形態をとっている事が認められた。またこの複
合体の嵩比重が0.24g/ccであった。Example-1 Sodium polyacrylate as water-absorbing polymer (A)
20 g, ion-exchanged water 100 g, bentonite 10 g as the water-insoluble inorganic substance (B), and cellulose powder (CF11 manufactured by Whatman, as the water-insoluble hydrophilic fibrous substance C).
A liquid-absorbent composite was obtained by kneading 10 g of fiber length to 500 μm) with a twin-screw kneader for about 10 minutes and then drying under reduced pressure at 80 ° C. When this was confirmed by an electron microscope, it was confirmed that bentonite and cellulose powder were in a form of being immobilized on the surface of the water-absorbent polymer. The bulk specific gravity of this composite was 0.24 g / cc.
同様な操作により吸水性ポリマー（Ａ）、水不溶性無機
物質（Ｂ）、水不溶性親水性繊維状物質（Ｃ）を表−１
に示す如く種々変え、吸液性複合体を得た。それらの吸
収性能を表−１に示す。By the same operation, the water-absorbent polymer (A), the water-insoluble inorganic substance (B) and the water-insoluble hydrophilic fibrous substance (C) are shown in Table-1.
As shown in, various changes were made to obtain an absorbent composite. Their absorption performances are shown in Table-1.
また比較品として吸水性ポリマー（Ａ）のみのもの、吸
水性ポリマー（Ａ）及び水不溶性無機物質（Ｂ）のみか
らなるもの、吸水性ポリマー（Ａ）と水不溶性親水性繊
維状物質（Ｃ）のみからなるものの吸収性能も併せて表
−１に示す。Further, as comparative products, those comprising only the water-absorbing polymer (A), those comprising only the water-absorbing polymer (A) and the water-insoluble inorganic substance (B), the water-absorbing polymer (A) and the water-insoluble hydrophilic fibrous substance (C) Table 1 also shows the absorption performance of those made of only.
上記のようにして得られた吸液性複合体又は比較品を用
い、第１図（ｄ）に示す構成の生理用ナプキンを得た。By using the liquid-absorbent composite or the comparative product obtained as described above, a sanitary napkin having a constitution shown in FIG. 1 (d) was obtained.
尚、吸収層として吸液性複合体0.6g、綿状パルプ2.0g、
吸収紙1.5g、レーヨンステープル綿0.3gを用い、表面シ
ートとしてはポリエステル65％、ポリエチレン／ポリプ
ロピレン複合繊維35％で目付20g/m2のヒートボンド不織
布を用いた。また防水シートは、防水紙（25g/m2）のポ
リエチレン10μラミネート物を用いた。Incidentally, the absorbent layer as an absorbent layer 0.6 g, cotton pulp 2.0 g,
1.5 g of absorbent paper and 0.3 g of rayon staple cotton were used, and a heat-bonded non-woven fabric having 65% polyester, 35% polyethylene / polypropylene composite fiber and a basis weight of 20 g / m 2 was used as the surface sheet. As the waterproof sheet, a polyethylene 10 μ laminate of waterproof paper (25 g / m 2 ) was used.
得られた生理用ナプキンの液戻り量及び動的最大吸収量
を測定し、表−１に示した。The liquid return amount and dynamic maximum absorption amount of the obtained sanitary napkin were measured and shown in Table 1.
表−１に示す如く、本発明の吸収性物品が血液等の高粘
性液体の吸収性に優れる事は明白である。 As shown in Table-1, it is obvious that the absorbent article of the present invention has excellent absorbency for highly viscous liquid such as blood.
第１図は本発明の吸収生物品の種々実施態様を示す横断
面図であり、第２図は可動式女性腰部モデルの斜視図、
第３図は吸収速度の測定に用いた装置の略図である。 １……液透過性表面材（不織布） ２……液不透過性防漏材（防水シート） ３……紙または不織布 ４……吸液性複合体 ５……粉砕パルプまたはセルロース粉末 ６……台紙 ７……クレープ紙 ８……レーヨンステープル綿 ９……可動式女性腰部モデル 10……滴下チューブ 11……試験サンプル 12……ビュレットの上口 13……測定台 14……空気口 15……ガラスフィルターFIG. 1 is a cross-sectional view showing various embodiments of the absorbent biological product of the present invention, and FIG. 2 is a perspective view of a movable female waist model.
FIG. 3 is a schematic diagram of the apparatus used for measuring the absorption rate. 1 ... Liquid-permeable surface material (nonwoven fabric) 2 ... Liquid-impermeable leakproof material (waterproof sheet) 3 ... Paper or nonwoven fabric 4 ... Liquid-absorbing composite 5 ... Pulverized pulp or cellulose powder 6 ... Mount 7 …… Crepe paper 8 …… Rayon staple cotton 9 …… Movable female waist model 10 …… Drip tube 11 …… Test sample 12 …… Burette top 13 …… Measuring stand 14 …… Air vent 15 …… Glass filter
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ａ６１Ｆ 13/00 ３５１ Ｚ 13/46 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location A61F 13/00 351 Z 13/46
Claims (4)
機物質、および（Ｃ）水不溶性親水性繊維状物質からな
る吸液性複合体であり、かつその複合比（重量比）が
（Ａ）：（Ｂ）：（Ｃ）＝100:5〜1200:5〜1200である
吸液性複合体を含有することを特徴とする吸収性物品。1. A liquid-absorbent composite comprising (A) a water-absorbing polymer, (B) a water-insoluble inorganic substance, and (C) a water-insoluble hydrophilic fibrous substance, and having a composite ratio (weight ratio) thereof. (A) :( B) :( C) = 100: 5 to 1200: An absorbent article containing a liquid-absorbent composite in the range of 5 to 1200.
リル酸塩を主成分とする水溶性エチレン性不飽和単量体
の重合体またはその架橋物である特許請求の範囲第１項
記載の吸収性物品。2. The absorbent according to claim 1, wherein the water-absorbent polymer is a polymer of a water-soluble ethylenically unsaturated monomer containing acrylic acid or an acrylic acid salt as a main component or a cross-linked product thereof. Goods.
許請求の範囲第１項又は第２項記載の吸収性物品。3. The absorbent article according to claim 1 or 2, wherein the liquid-absorbent composite is in contact with hydrophilic fibers.
ある特許請求の範囲第１項記載の吸収性物品。4. The absorbent article according to claim 1, wherein the liquid-absorbent composite has a bulk specific gravity of 0.03 to 0.7 g / cc.
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62080089A JPH0728891B2 (en) | 1987-04-01 | 1987-04-01 | Absorbent article |
| ES88300402T ES2035259T5 (en) | 1987-01-28 | 1988-01-19 | PROCEDURE FOR THE MANUFACTURE OF AN ABSORBENT ARTICLE. |
| DE19883875749 DE3875749T3 (en) | 1987-01-28 | 1988-01-19 | Process for making an absorbent composition |
| PH36370A PH25432A (en) | 1987-01-28 | 1988-01-19 | Absorbent composite |
| EP19880300402 EP0278601B2 (en) | 1987-01-28 | 1988-01-19 | Process for manufacturing an absorbent composite |
| MYPI88000055A MY102664A (en) | 1987-01-28 | 1988-01-22 | Absorbent composite |
| KR1019880000548A KR910008362B1 (en) | 1987-01-28 | 1988-01-25 | Absorbent composite |
| CA 557329 CA1314698C (en) | 1987-01-28 | 1988-01-26 | Absorbent composite |
| US08/068,288 US5489469A (en) | 1987-01-28 | 1993-05-28 | Absorbent composite |
| SG59394A SG59394G (en) | 1987-01-28 | 1994-04-27 | Absorbent composite |
| HK50194A HK50194A (en) | 1987-01-28 | 1994-05-19 | Absorbent composite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62080089A JPH0728891B2 (en) | 1987-04-01 | 1987-04-01 | Absorbent article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63246159A JPS63246159A (en) | 1988-10-13 |
| JPH0728891B2 true JPH0728891B2 (en) | 1995-04-05 |
Family
ID=13708470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62080089A Expired - Lifetime JPH0728891B2 (en) | 1987-01-28 | 1987-04-01 | Absorbent article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0728891B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5436737B2 (en) * | 2001-05-15 | 2014-03-05 | 一般財団法人川村理化学研究所 | Aqueous solution absorbent material and hygiene products |
| WO2004106235A1 (en) * | 2003-05-29 | 2004-12-09 | Matsushita Electric Industrial Co., Ltd. | Dry gel compound body and method of manufacturing the same |
| US8034740B2 (en) * | 2004-02-05 | 2011-10-11 | Taiyo Kagaku Co., Ltd. | Adsorptivity imparting agent containing porous silica |
| JP2012133177A (en) * | 2010-12-22 | 2012-07-12 | Daiei Kk | Article for display |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5259086A (en) * | 1975-11-11 | 1977-05-16 | Kao Corp | Absorbing material |
| JPS5812652A (en) * | 1981-04-21 | 1983-01-24 | キンバリ−・クラ−ク・コ−ポレ−シヨン | Highly absorbing material with excellent absorbing property |
| JPS6158657A (en) * | 1984-08-30 | 1986-03-25 | 三洋化成工業株式会社 | Absorbing material and absorbable article |
| JPH0720548A (en) * | 1993-07-05 | 1995-01-24 | Canon Inc | Camera |
-
1987
- 1987-04-01 JP JP62080089A patent/JPH0728891B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5259086A (en) * | 1975-11-11 | 1977-05-16 | Kao Corp | Absorbing material |
| JPS5812652A (en) * | 1981-04-21 | 1983-01-24 | キンバリ−・クラ−ク・コ−ポレ−シヨン | Highly absorbing material with excellent absorbing property |
| JPS6158657A (en) * | 1984-08-30 | 1986-03-25 | 三洋化成工業株式会社 | Absorbing material and absorbable article |
| JPH0720548A (en) * | 1993-07-05 | 1995-01-24 | Canon Inc | Camera |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63246159A (en) | 1988-10-13 |
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