JPS6132672Y2 - - Google Patents
Info
- Publication number
- JPS6132672Y2 JPS6132672Y2 JP1979157469U JP15746979U JPS6132672Y2 JP S6132672 Y2 JPS6132672 Y2 JP S6132672Y2 JP 1979157469 U JP1979157469 U JP 1979157469U JP 15746979 U JP15746979 U JP 15746979U JP S6132672 Y2 JPS6132672 Y2 JP S6132672Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- layer
- absorbing
- water absorption
- absorbed
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 87
- 239000000835 fiber Substances 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 19
- 229920002301 cellulose acetate Polymers 0.000 claims description 10
- 229920000247 superabsorbent polymer Polymers 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 description 67
- 238000009792 diffusion process Methods 0.000 description 34
- 239000007788 liquid Substances 0.000 description 26
- 239000008280 blood Substances 0.000 description 22
- 210000004369 blood Anatomy 0.000 description 22
- 230000002175 menstrual effect Effects 0.000 description 20
- 230000014759 maintenance of location Effects 0.000 description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 239000004745 nonwoven fabric Substances 0.000 description 7
- 230000000717 retained effect Effects 0.000 description 7
- 238000010998 test method Methods 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 6
- 229920000742 Cotton Polymers 0.000 description 4
- 229920000297 Rayon Polymers 0.000 description 4
- 239000002964 rayon Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005906 menstruation Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Description
（産業上の利用分野）
本考案は、吸水拡散性、保液性等を改良した生
理用ナプキンに関するものである。
（従来技術）
従来の生理用ナプキンは、人体側の最上層に吸
水紙または脱脂綿等からなる吸水層を配置してい
るが、その素材の繊維の方向は不規則であるため
経血等はこの吸水層の中心部に局部的に吸収さ
れ、中心部から円形状に拡散する傾向にある。一
方、生理用ナプキンの形状は縦長であり、従つ
て、従来のように中心部に局部吸収され円形状に
拡散すると、ナプキン長手方向には未だ吸収の余
力があるにも拘らず、厚み方向および幅方向に対
しては短時間で飽和状態になり、その後、前記経
血等が人体側に逆流したり横から漏れるという現
象が生じる。
なお、従来から吸収、拡散効率を高めるために
前記吸水層の密度を高くしたり、多層構造にした
ものが種々提案されているが、いずれも厚み方向
に対する吸水性、保液性を改良したもので、素材
の繊維の方向が乱雑のままであるため、経血等は
依然として局部吸収されて円形状に拡散され、厚
み方向および幅方向に対して短時間で飽和状態に
なり、そのため人体側への逆流および横からの漏
洩現象を完全に防止することはできず、また、こ
のように密度を高くし、あるいは層を厚くすれ
ば、クツシヨン効果が低下し、違和感が増大する
欠点がある。
（考案の目的）
本考案は、このような問題を解消するためにな
されたものであり、生理用ナプキンの縦長の形状
にあわせて長手方向の吸水拡散効率を高め、全体
的に薄くでき、しかも吸水性、保液性、防水性を
向上させ、かつ、肌触りが良く、クツシヨン性に
富み、快適に使用できる生理用ナプキンを提供す
ることを目的としている。
（考案の構成）
本考案の特徴とするところは、防水層の上に、
吸水紙からなる補助吸水層、高吸水性高分子ポリ
マーからなる吸水保液層、セルロースアセテート
繊維のトウを帯状に開繊した単糸繊度の小さい長
繊維群をその繊維長手方向をナプキン長手方向に
平行に密に配列して綿状に形成した吸水拡散層を
順次積層し、これら全体を透水性を有する被覆材
で包んで、生理用ナプキンを構成した点にある。
（実施例）
本考案の実施例を図によつて説明する。
１は防水層で、ナプキン幅寸法より広幅に形成
したポリエチレンフイルムラミネート紙を用い、
その幅方向中央部に複数枚の吸水紙を重ね合わせ
てなる補助吸水層２をのせ、その上に高吸水性高
分子ポリマーとしてのGSPシート（商品名：日本
バイリーン社製）からなる吸水保液層３をのせ、
上記防水層１の両側辺部を吸水保液層３の上面両
側辺部に巻上げるように折返し、防水層１にて補
助吸水層２および吸水保液層３を横巻きに包む。
ただし、吸水保液層３の幅方向中央大部分は上面
に露出させておく。
その後、吸水保液層３の上に、セルロースアセ
テート繊維のトウを帯状に開繊した単糸繊度の小
さい長繊維群をその繊維長手方向をナプキン長手
方向に平行に密に配列して綿状に形成してなる吸
水拡散層４をのせ、さらに、これら全体をポリエ
ステル／レーヨン混紡不織布からなる被覆材５に
て包み、この被覆材５の幅方向両側辺部を下側に
巻いて一部重ね合わせ、その長手方向両端を圧着
することにより縦長の生理用ナプキンを横成す
る。
上記生理用ナプキンは、その上面すなわち吸水
拡散層４側を人体側にして用いるもので、下面
（非使用面）には予め所定部位にずれ止め片とし
て両面粘着テープ（図示せず）を付設してあり、
この両面粘着テープを下着等に粘着固定し、位置
ずれを防止して用いる。
この使用状態において、人体から***される経
血等は、まず被覆材５を通して吸水拡散層４に吸
収され、この吸水拡散層４で長繊維群の毛管作用
によりナプキン長手方向に拡散されながら厚み方
向に透過され、次いで、吸水保液層３に吸収され
保液される。
この場合、被覆材５として上記ポリエステル／
レーヨン混紡不織布を用いることにより、肌触り
が極めて良好となる。被覆材５には上記不織布に
限らず、レーヨン不織布、綿不織布をラミネート
したレーヨン紙等、不織布を主体とした素材を用
いることにより同様の効果が得られる。
また、吸水拡散層４として、セルロースアセテ
ート繊維のトウを帯状に開繊した単糸繊度の小さ
い長繊維群をその繊維長手方向をナプキン長手方
向に密に配列して綿状に形成した素材を用いてい
るので、秀れたクツシヨン効果を発揮しながら吸
水効率および拡散効率を高めることができる。す
なわち、セルロースアセテート繊維は、一般に疎
水性繊維として認識されているが、上記のように
セルロースアセテート繊維のトウを帯状に開繊す
ることにより、単糸繊度を小さくして単位重量当
りの繊維の本数を大幅に増大でき、かつ、このよ
うに単糸繊度を小さくした長繊維群をその繊維長
手方向がナプキン長手方向と平行で密に配列して
綿状に形成することによつて、吸水拡散層４にお
ける単位体積当りの繊維の本数を大幅に増大でき
ると共に、各繊維間の隙間を極めて小さくしてそ
の隙間の数を格段に増大できる。そして、これら
微細な多数の隙間によつてクツシヨン効果を高め
ながら、強力な毛管作用を発揮し、この強力な毛
管作用によつて、上記被覆材５を透過した経血等
を吸収すると同時に、ナプキン長手方向に速やか
に拡散させ、楕円形状に拡散させながら効率よく
吸収できる。従つて、従来のように円形状に吸収
拡散する場合に比べて吸収拡散効率を高め、全体
的な吸水量を大幅に増大できることになる。
とくに吸水拡散層４として、単糸繊度が８デニ
ール以下、総繊維が35000〜50000デニールのセル
ロースアセテート繊維を用いるのが最も効果的で
ある。この素材によれば、圧縮率が高く、クツシ
ヨン効果を大幅に向上でき、上記不織布を主体と
した被覆材５の肌触りと相俟つて使用感を極めて
良好にでき、しかも、この吸水拡散層４の単位体
積当りの吸水量を従来の吸水紙、脱脂綿等のパル
プフラツプからなる吸水層に比べて増大しなが
ら、その微細な多数の隙間による強力な毛管作用
によつて吸収と同時に長手方向に拡散させるの
で、全体的な吸水量をさらに大幅に増大できるの
である。
なお、上記吸水拡散層４には、タバコ用フイル
タープラグから回収されるセルロースアセテート
繊維も有利に利用することができる。このほかセ
ルロースアセテート繊維に繊維素糸繊維を混合し
たものを用いてもよい。
次に、上記吸水拡散層４にて吸収拡散された軽
血等は、その下面に接している吸水保液層３に吸
収され保液される。この場合、前記吸水拡散層４
にて吸収された経血等は、この吸水拡散層４にて
吸収されると同時に前述した強力な毛管作用によ
つて拡散され、これによつて吸水量が増大するこ
とになるが、この吸水拡散層４の素材本来の特性
が疎水性を有するものであるから、その保液力は
下層の吸水保液層３に比べて小さく、かつ、該吸
水保液層３の吸水量および保液量が大きいため、
上記経血等は、吸水拡散層４によつて一旦吸収さ
れナプキン長手方向に速やかに拡散された後、ナ
プキン厚み方向下方に移行し、その下層の吸水保
液層３によるさらに強力な吸水力によつて該吸水
保液層３に速やかに吸収され保液される。
また、吸水保液層３を吸水性高分子ポリマーに
て形成しているので、この吸水保液層３が経血等
を吸収すると直ちにゲル化して経血等を保液する
ことになり、経血等が吸水拡散層４側に逆流する
ことなく、かつ、経血等が吸水拡散層４に滞留す
ることもなく、そのほとんどが吸水保液層３に吸
収され保液される。そして、上記吸水拡散層４に
て経血等が吸収拡散されて、吸水保液層３にて吸
収保液された後は、再度上記吸水拡散層４によつ
て前述したような吸収拡散作用が発揮され、以
下、上記の作用を繰返すことにより、吸水保液層
の３による吸収保液量を増大できることになる。
この場合、吸水保液層３に上記GSPシートを用い
ることにより、吸収保液量をさらに増大できる。
上記GSPシートは、ハンマーミルにより充分解
離された綿状パルプおよび澱粉−ポリアクリロニ
トリルグラウト共重合体のアルカリ金属塩
（GSP）のパウダーを所定の重量比率でミキサー
に空気流で送り込み、撹拌して均一な混合物と
し、これをデイストリビユーターを通じて70±12
ｇ／cm2のウエツプ状とし、これを湿熱圧着により
シート状に成形一体化することによつて製造され
るもので、このGSPシートは、吸水性がきわめて
高く、かつ、水分を吸収すると膨潤しゲル状とな
る特性を備えている。
このような特性を備えたGSPシートからなる吸
水保液層３を上記吸水拡散層４の下面に重ねて用
いると、吸水拡散層４にて吸収し長手方向に拡散
した経血等を吸水保液層３により広面積で速やか
に吸収し、吸水能力を大巾に増大できる。また、
同シートは上記の如く水分を吸収して膨潤しゲル
状となるため、従来の吸水紙が脱脂綿等からなる
吸水層のように一旦吸収した経血等が吸水層で液
状のまま飽和状態となつて遂にはナプキン側縁部
等から滲み出たり、人体側に逆流したりするおそ
れがない。すなわち、吸収した経血等の保液性が
格段に秀れたものとなる。なお、吸水保液層３と
してGSPシート以外の高吸水性高分子ポリマーを
主体としたシート状物を用いても同様の効果が得
られる。
一方、吸水保液層３の下面に重ね合わせた補助
吸水層２は、月経初期あるいは長時間使用によつ
て経血等の***量が多くなつた場合の安全性を期
すために補助的に設けたもので、経血等の吸水お
よび保液はほとんど上記吸水拡散層４と吸水保液
層３によつて行なわれるため、補助吸水層２に吸
収される経血等は極く僅かであり、従つて、この
補助吸水層２には周知の吸水紙を複数枚重ねて用
いるだけで充分である。
また、たとえ経血等が吸水保液層３および補助
吸水層２を通過しても最下層に防水層１を設けて
あるので外部に漏洩するおそれはない。
次に、上記生理用ナプキンの吸水量および保液
量（保水量）について考案する。
実験例 １
試料として本考案に係る生理用ナプキンを用い
て吸水量試験を行なつた。
試料の構造は図に示す通りである。なお、総重
量は５ｇで、各層の割合（重量％）は第１表の通
りである。
(Industrial Application Field) The present invention relates to a sanitary napkin with improved water absorption and diffusion properties, liquid retention properties, etc. (Prior art) Conventional sanitary napkins have a water-absorbing layer made of water-absorbing paper or absorbent cotton on the top layer facing the human body, but because the direction of the fibers of this material is irregular, menstrual blood, etc. It is locally absorbed in the center of the water absorption layer and tends to diffuse in a circular shape from the center. On the other hand, the shape of a sanitary napkin is vertically long, so if it is locally absorbed in the center and spread in a circular shape as in the past, even though there is still some absorption capacity in the longitudinal direction of the napkin, The width direction becomes saturated in a short time, and then the menstrual blood or the like flows back toward the human body or leaks from the sides. In addition, various proposals have been made to increase the density of the water absorption layer or to have a multilayer structure in order to increase absorption and diffusion efficiency, but all of these have improved water absorption and liquid retention in the thickness direction. However, since the direction of the fibers of the material remains disordered, menstrual blood, etc., is still locally absorbed and diffused in a circular shape, reaching saturation in a short time in the thickness and width directions, and therefore flowing toward the human body. It is not possible to completely prevent the phenomenon of backflow and leakage from the sides, and if the density is increased or the layer is thickened in this way, there is a disadvantage that the cushioning effect decreases and the discomfort increases. (Purpose of the invention) The present invention was made to solve these problems, and it increases the water absorption and diffusion efficiency in the longitudinal direction according to the vertically long shape of the sanitary napkin, allows it to be thinner overall, and The purpose of the present invention is to provide a sanitary napkin that has improved water absorption, liquid retention, and waterproofness, is soft to the touch, has high cushioning properties, and is comfortable to use. (Structure of the invention) The feature of this invention is that on top of the waterproof layer,
An auxiliary water-absorbing layer made of water-absorbing paper, a water-absorbing liquid-retaining layer made of a highly water-absorbing polymer, and a group of long fibers with small single filament fineness made by opening cellulose acetate fiber tow into a band shape, with the longitudinal direction of the fibers aligned in the longitudinal direction of the napkin. The sanitary napkin is constructed by sequentially laminating water absorbing and diffusing layers arranged densely in parallel and formed into cotton-like shapes, and wrapping the entire layer with a water-permeable covering material. (Example) An example of the present invention will be described with reference to the drawings. 1 is the waterproof layer, which is made of polyethylene film laminated paper that is wider than the napkin width.
An auxiliary water absorbing layer 2 made of multiple sheets of water absorbing paper stacked on top of each other is placed at the center in the width direction, and a water absorbing liquid retaining layer 2 made of GSP sheet (product name: Nippon Vilene Co., Ltd.) as a super absorbent polymer is placed on top of it. Put layer 3 on,
Both sides of the waterproof layer 1 are folded back to cover both sides of the upper surface of the water-absorbing liquid-retaining layer 3, and the auxiliary water-absorbing layer 2 and the water-absorbing liquid-retaining layer 3 are wrapped horizontally in the waterproof layer 1.
However, most of the center of the water-absorbing liquid-retaining layer 3 in the width direction is exposed on the upper surface. After that, on the water-absorbing liquid-retaining layer 3, a group of long fibers with small single filament fineness, which are made by opening cellulose acetate fiber tow into a band shape, are densely arranged with the longitudinal direction of the fibers parallel to the longitudinal direction of the napkin to form a cotton-like shape. The formed water absorption and diffusion layer 4 is placed thereon, and the whole is wrapped with a covering material 5 made of a polyester/rayon blended nonwoven fabric, and both sides of the covering material 5 in the width direction are rolled downward and partially overlapped. By crimping both ends in the longitudinal direction, a vertically long sanitary napkin is formed horizontally. The above-mentioned sanitary napkin is used with its upper surface, that is, the water absorption and diffusion layer 4 side facing the human body, and double-sided adhesive tape (not shown) is attached to the lower surface (unused surface) as a slip prevention piece in advance at a predetermined part. There is,
This double-sided adhesive tape is adhesively fixed to underwear or the like to prevent displacement. In this state of use, menstrual blood, etc. excreted from the human body is first absorbed into the water absorption and diffusion layer 4 through the covering material 5, and in this water absorption and diffusion layer 4, it is diffused in the longitudinal direction of the napkin due to the capillary action of the long fibers. The liquid is then absorbed and retained by the water-absorbing liquid-retaining layer 3. In this case, as the covering material 5, the above polyester/
By using a rayon blend nonwoven fabric, the feel is extremely good. The covering material 5 is not limited to the above-mentioned nonwoven fabric, but the same effect can be obtained by using a material mainly composed of nonwoven fabric, such as rayon nonwoven fabric or rayon paper laminated with cotton nonwoven fabric. In addition, as the water absorption and diffusion layer 4, a material is used in which a group of long fibers with small single filament fineness, which are formed by opening a tow of cellulose acetate fibers into a band shape, are arranged densely in the longitudinal direction of the napkin to form a cotton-like material. This makes it possible to improve water absorption and diffusion efficiency while providing excellent cushioning effects. In other words, cellulose acetate fiber is generally recognized as a hydrophobic fiber, but by opening the tow of cellulose acetate fiber into a band shape as described above, the single filament fineness can be reduced and the number of fibers per unit weight can be increased. The water absorption and diffusion layer can be greatly increased by forming a cotton-like structure by closely arranging long fibers with small single fiber fineness so that the longitudinal direction of the fibers is parallel to the longitudinal direction of the napkin. The number of fibers per unit volume in 4 can be greatly increased, and the gaps between each fiber can be made extremely small to greatly increase the number of gaps. These numerous fine gaps enhance the cushioning effect while exerting a strong capillary action, and at the same time, this strong capillary action absorbs menstrual blood, etc. that has passed through the dressing material 5, and at the same time, the napkin It can be quickly diffused in the longitudinal direction and efficiently absorbed while being diffused in an elliptical shape. Therefore, compared to the conventional case of absorbing and diffusing in a circular shape, the absorption and diffusion efficiency can be increased and the overall amount of water absorbed can be significantly increased. In particular, it is most effective to use cellulose acetate fibers with a single fiber fineness of 8 deniers or less and a total fiber count of 35,000 to 50,000 deniers as the water absorption and diffusion layer 4. This material has a high compression rate and can greatly improve the cushioning effect, and together with the texture of the covering material 5 mainly made of nonwoven fabric, it can provide an extremely good feeling of use. The amount of water absorbed per unit volume is increased compared to conventional water absorption layers made of pulp flaps such as water absorbent paper and absorbent cotton, and at the same time it is absorbed and diffused in the longitudinal direction by the strong capillary action created by the many fine gaps. , the overall water absorption can be further increased significantly. Note that cellulose acetate fibers recovered from cigarette filter plugs can also be advantageously used for the water absorption and diffusion layer 4. In addition, a mixture of cellulose acetate fiber and filament fiber may also be used. Next, the light blood and the like absorbed and diffused by the water absorption and diffusion layer 4 are absorbed and retained by the water absorption and liquid retention layer 3 that is in contact with the lower surface thereof. In this case, the water absorption diffusion layer 4
Menstrual blood, etc. absorbed in the water absorption and diffusion layer 4 are simultaneously absorbed by the water absorption and diffusion layer 4 and diffused by the aforementioned strong capillary action, thereby increasing the amount of water absorption. Since the inherent property of the material of the diffusion layer 4 is hydrophobic, its liquid retention capacity is smaller than that of the lower water-absorbing liquid-retaining layer 3, and the amount of water absorbed and liquid retained by the water-absorbing liquid-retaining layer 3 is small. is large, so
The menstrual blood, etc. is once absorbed by the water absorbing and diffusing layer 4 and quickly diffused in the longitudinal direction of the napkin, and then moves downward in the thickness direction of the napkin, where it is absorbed by the water absorbing liquid retaining layer 3, which has an even stronger water absorbing force. Therefore, it is quickly absorbed and retained in the water-absorbing liquid-retaining layer 3. In addition, since the water-absorbing liquid-retaining layer 3 is made of a water-absorbing polymer, when the water-absorbing liquid-retaining layer 3 absorbs menstrual blood, it immediately turns into a gel and retains the menstrual blood. Blood and the like do not flow back to the water absorption and diffusion layer 4 side, and menstrual blood and the like do not stay in the water absorption and diffusion layer 4, and most of it is absorbed and retained in the water absorption and liquid retention layer 3. After menstrual blood and the like are absorbed and diffused in the water absorption and diffusion layer 4 and absorbed and retained in the water absorption and liquid retention layer 3, the water absorption and diffusion layer 4 again performs the above-mentioned absorption and diffusion effect. By repeating the above action, the amount of liquid absorbed and retained by the water absorbing liquid retaining layer 3 can be increased.
In this case, by using the above-mentioned GSP sheet for the water-absorbing liquid-retaining layer 3, the amount of absorbed liquid-retaining material can be further increased. The above GSP sheet is produced by feeding flocculent pulp that has been thoroughly separated in a hammer mill and powder of alkali metal salt (GSP) of starch-polyacrylonitrile grout copolymer into a mixer at a predetermined weight ratio, and then stirring to create a uniform product. A mixture of 70 ± 12
GSP sheet is produced by forming a wet sheet with a weight of g/cm 2 and integrally molding it into a sheet using wet heat compression bonding.This GSP sheet has extremely high water absorption and swells when it absorbs water. It has the property of becoming gel-like. When the water-absorbing liquid-retaining layer 3 made of a GSP sheet with such characteristics is used by stacking it on the lower surface of the water-absorbing and diffusing layer 4, the water-absorbing liquid absorbs and retains menstrual blood, etc. that have been absorbed by the water-absorbing and diffusing layer 4 and diffused in the longitudinal direction. Layer 3 allows rapid absorption over a wide area and greatly increases water absorption capacity. Also,
As mentioned above, the sheet absorbs water, swells, and becomes gel-like, so unlike conventional water-absorbing paper, which has a water-absorbing layer made of absorbent cotton, once absorbed menstrual blood, etc. remains in a liquid state in the water-absorbing layer, becoming saturated. Finally, there is no risk of it seeping out from the side edges of the napkin or flowing back into the human body. In other words, the liquid retaining properties for absorbed menstrual blood and the like are significantly improved. Note that the same effect can be obtained even if a sheet-like material mainly made of a superabsorbent polymer other than the GSP sheet is used as the water-absorbing liquid-retaining layer 3. On the other hand, the auxiliary water-absorbing layer 2 superimposed on the lower surface of the water-absorbing liquid-retaining layer 3 is provided as an auxiliary layer to ensure safety when the amount of menstrual blood etc. increases during the early period of menstruation or due to long-term use. Most of the water absorption and retention of menstrual blood, etc. is carried out by the water absorption diffusion layer 4 and water absorption liquid retention layer 3, so only a small amount of menstrual blood, etc. is absorbed by the auxiliary water absorption layer 2. Therefore, it is sufficient to use a plurality of layers of well-known water-absorbing paper for the auxiliary water-absorbing layer 2. Further, even if menstrual blood or the like passes through the water-absorbing liquid retaining layer 3 and the auxiliary water-absorbing layer 2, there is no risk of leakage to the outside because the waterproof layer 1 is provided at the bottom layer. Next, the water absorption amount and liquid retention amount (water retention amount) of the sanitary napkin will be considered. Experimental Example 1 A water absorption test was conducted using a sanitary napkin according to the present invention as a sample. The structure of the sample is as shown in the figure. The total weight was 5 g, and the proportions (% by weight) of each layer were as shown in Table 1.
【表】
吸水量の試験法は、生理用品基準（昭和41年５
月24日厚生省告示第285号）の規格および試験
法で規定された日本薬局方（昭和46年４月厚生省
告示第73号）による試験法を用いた。その試験法
は次の通りである。
試料を使用面を上にして重量既知の1680ミクロ
ン（10メツシユ）の金網上におき、その全面にビ
ーカーで静かに水をそそぎ、試験全体に完全に吸
水させ、さらに水があふれるまで注水をつづけ、
１分間放置した後、秤量した。吸水量は吸水後の
試料総重量から吸水前の試料重量を引いたもので
ある。
その結果は第２表に示す通りである。[Table] The water absorption test method is based on the sanitary product standards (May 1960)
The test method according to the Japanese Pharmacopoeia (Ministry of Health and Welfare Notification No. 73, April 1973) specified in the standards and test methods of the Ministry of Health and Welfare Notification No. 285, April 24, 1971 was used. The test method is as follows. Place the sample on a 1680 micron (10 mesh) wire mesh with a known weight, with the side to be used facing up, and gently pour water over the entire surface with a beaker until the entire test area is completely absorbed, then continue pouring water until the water overflows. ,
After standing for 1 minute, it was weighed. The amount of water absorbed is the total weight of the sample after water absorption minus the weight of the sample before water absorption. The results are shown in Table 2.
【表】
実験例 ２
上記実施例１における試料中、吸水拡散層と吸
水保液層に相当する部分をこれとほぼ同じ重量を
有する吸水紙に置き換えたものを試料とし、上記
実験例１と同じ試験法で吸水量試験を行なつた。
その結果は第３表に示す通りである。[Table] Experimental Example 2 The sample in Example 1 above was the same as Experimental Example 1 above, except that the portions corresponding to the water absorption diffusion layer and water absorption liquid retention layer were replaced with water absorption paper having approximately the same weight. A water absorption test was conducted using the test method. The results are shown in Table 3.
【表】
上記実験１，２により、本考案に基づく試料No.
１〜５がいずれも生理処理用品基準に合格してい
ることはいうまでもなく、吸水層を吸水紙のみに
て形成したブランク品の試料No.６〜10に比べて吸
水量が飛躍的に増大していることがわかる。
実験例 ３
上記第１表に準じて試料No.11〜15を製作し、保
水量試験を行なつた。
その試験法は次の通りである。
内寸が縦165mm、横67mm、深さ50mmの薄鉄板製
容器の底部に、厚さ３mmの鉄板に直径６mmの円孔
を27個開孔した孔明鉄板をはめ込んで用意し、該
容器内に試料を入れ、その上に容器に合致した大
きさの薄鉄板をのせ、この状態で25゜±２℃に調
整した精製水の中に浸漬して５分間放置した。次
に、該試料を容器ごと静かに取り出し、２分間放
置した後、錘（底面積165×67mm、目方5436ｇ）
を静かにのせ１分間待つた。すなわち試料に約50
ｇ／cm2の荷重をかけた。その後、錘を除け静かに
周囲の水滴を拭い秤量した。その重量Ｂより前記
容器（孔明鉄板、薄鉄板を含む）の重量Ｃおよび
試料の重さＡを除いたものが保水量Ｘである。
Ｘ＝Ｂ−Ｃ−Ａ
保水倍率＝Ｘ／Ａ
その結果は第４表に示す通りである。[Table] According to the above experiments 1 and 2, sample No. based on the present invention.
It goes without saying that samples 1 to 5 all pass the standards for sanitary products, and the amount of water absorbed is dramatically higher than that of samples No. 6 to 10, which are blank products whose water absorption layer is formed only from water absorbent paper. It can be seen that it is increasing. Experimental Example 3 Samples Nos. 11 to 15 were prepared according to Table 1 above, and a water retention test was conducted. The test method is as follows. A perforated iron plate with 27 circular holes of 6 mm diameter drilled in a 3 mm thick iron plate was fitted into the bottom of a thin iron plate container with internal dimensions of 165 mm in length, 67 mm in width, and 50 mm in depth. A sample was placed, a thin iron plate of a size matching the container was placed on top of the sample, and in this state it was immersed in purified water adjusted to 25°±2°C and left for 5 minutes. Next, the sample was carefully taken out of the container, left for 2 minutes, and then weighed with a weight (base area 165 x 67 mm, weight 5436 g).
I placed it on it gently and waited for 1 minute. i.e. approximately 50
A load of g/cm 2 was applied. After that, the weight was removed, the surrounding water droplets were gently wiped, and the weight was weighed. The water retention amount X is obtained by subtracting the weight C of the container (including the iron plate and thin iron plate) and the weight A of the sample from the weight B. X=B-C-A Water retention ratio=X/A The results are shown in Table 4.
【表】
実験例 ４
ブランク品として、上記第１表で示した試料
中、吸水拡散層と吸水保液層に相当する部分をこ
れとほぼ同じ重量を有する吸水紙に置き換えたも
のを試料とし、上記実験例３と同じ試験法で保水
量試験を行なつた。
その結果を示せば第５表の通りである。[Table] Experimental Example 4 As a blank product, the sample shown in Table 1 above was obtained by replacing the portions corresponding to the water absorption diffusion layer and the water absorption liquid retention layer with water absorption paper having approximately the same weight as these, and A water retention test was conducted using the same test method as in Experimental Example 3 above. The results are shown in Table 5.
【表】
上記実験例３，４により、本考案に基づく試料
No.11〜15が、吸水層を吸水紙のみにて形成したブ
ランク品の試料No.16〜20に比べて保水量が飛躍的
に増大していることがわかる。
（考案の効果）
以上説明したように、本考案によれば、高吸水
性高分子ポリマーからなる吸水保液層の上に吸水
拡散層を積層し、とくに、その吸水拡散層をセル
ロースアセテート繊維のトウを帯状に開繊した単
糸繊度の小さい長繊維群をその繊維長手方向をナ
プキン長手方向に密に配列して綿状に形成してあ
るので、吸水拡散層における単位体積当りの繊維
の本数を大幅に増大できると共に、各繊維間の隙
間を極力小さくしてその隙間の数を大幅に増大で
き、これら微細な多数の隙間によつて吸水拡散層
のクツシヨン性を高めながら、強力な毛管作用を
発揮してナプキン長手方向に対する吸水拡散効率
を高め、経血等を非常に効率よく吸収できる。そ
して、その下層の吸水保液層に速やかに吸収さ
せ、該吸水保液層の吸水効率、ならびに保液効率
を助長して、ナプキン全体の吸水、保液量を大幅
に増大でき、一旦吸収した経血等が人体側に逆流
したり横から漏れたりするおそれがない。また、
前記吸水拡散層による単位体積当りの吸収拡散効
率の向上と、吸水保液層による吸水保液効率の向
上との相乗作用によつて、ナプキンを全体的に薄
くできるので、包装、携帯に非常に便利であり、
かつ、肌触りが良く、クツシヨン性に富み、上記
吸水性、保液性、防漏性に秀れていることと相俟
つて、使用感を著しく良好にできるのである。[Table] According to Experimental Examples 3 and 4 above, samples based on the present invention
It can be seen that samples Nos. 11 to 15 have a dramatically increased water retention amount compared to samples Nos. 16 to 20, which are blank products in which the water absorption layer is formed only from water absorption paper. (Effects of the invention) As explained above, according to the invention, a water absorption and diffusion layer is laminated on a water absorption and liquid retention layer made of a super absorbent polymer, and in particular, the water absorption and diffusion layer is made of cellulose acetate fiber. Since the tow is opened into a band shape and long fibers with small fineness are arranged densely in the longitudinal direction of the napkin to form a cotton-like shape, the number of fibers per unit volume in the water absorption and diffusion layer is reduced. In addition to greatly increasing the number of gaps between each fiber, the number of gaps can be greatly increased by minimizing the gaps between each fiber, and these many fine gaps improve the cushioning properties of the water absorption and diffusion layer while also creating strong capillary action. This increases the water absorption and diffusion efficiency in the longitudinal direction of the napkin, allowing it to absorb menstrual blood etc. very efficiently. Then, it is quickly absorbed into the water-absorbing liquid-retaining layer below, promoting the water-absorbing efficiency and liquid-retaining efficiency of the water-absorbing liquid-retaining layer, and greatly increasing the water absorption and liquid retention amount of the entire napkin. There is no risk of menstrual blood flowing back into the human body or leaking from the sides. Also,
Due to the synergistic effect of the improvement in absorption and diffusion efficiency per unit volume by the water absorption and diffusion layer and the improvement in water absorption and retention efficiency by the water absorption and liquid retention layer, the napkin can be made thinner overall, making it extremely convenient for packaging and carrying. It is convenient and
In addition, it is soft to the touch, rich in cushioning properties, and combined with the above-mentioned excellent water absorption, liquid retention, and leak-proofing properties, it provides an extremely good feeling of use.
第１図は本考案に係る生理用ナプキンの内部の
各層を分解した状態を示す斜視図、第２図はその
製品の外観斜視図、第３図はその巾方向に沿つた
縦断面図である。
１……防水層、２……補助吸水層、３……吸水
保液層、４……吸水拡散層、５……被覆材。
Fig. 1 is a perspective view of the sanitary napkin according to the present invention in which the inner layers are disassembled, Fig. 2 is an external perspective view of the product, and Fig. 3 is a longitudinal sectional view taken along its width direction. . DESCRIPTION OF SYMBOLS 1...Waterproof layer, 2...Auxiliary water absorbing layer, 3...Water absorbing liquid retaining layer, 4...Water absorbing diffusion layer, 5...Coating material.
Claims (1)
吸水性高分子ポリマーからなる吸水保液層、セル
ロースアセテート繊維のトウを帯状に開繊した単
糸繊度の小さい長繊維群をその繊維長手方向をナ
プキン長手方向に平行に密に配列して綿状に形成
した吸水拡散層を順次積層し、これら全体を透水
性を有する被覆材で包んでなることを特徴とする
生理用ナプキン。 On top of the waterproof layer, there is an auxiliary water-absorbing layer made of water-absorbing paper, a water-absorbing liquid-retaining layer made of super absorbent polymer, and a group of long fibers with small single filament fineness made by opening cellulose acetate fiber tow into a belt shape. A sanitary napkin characterized in that water absorbing and diffusing layers formed in a cotton-like manner are successively laminated in densely arranged parallel to the longitudinal direction of the napkin, and the entire layer is wrapped with a water-permeable covering material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979157469U JPS6132672Y2 (en) | 1979-11-12 | 1979-11-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979157469U JPS6132672Y2 (en) | 1979-11-12 | 1979-11-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5673820U JPS5673820U (en) | 1981-06-17 |
| JPS6132672Y2 true JPS6132672Y2 (en) | 1986-09-24 |
Family
ID=29668755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1979157469U Expired JPS6132672Y2 (en) | 1979-11-12 | 1979-11-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6132672Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007181725A (en) * | 2007-03-23 | 2007-07-19 | Uni Charm Corp | Absorbent article using surface structure of continuous filament |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4939993A (en) * | 1972-08-25 | 1974-04-15 | ||
| JPS5220692A (en) * | 1975-08-11 | 1977-02-16 | Enzeru Kk | Sanitary napkin |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5555703Y2 (en) * | 1976-01-30 | 1980-12-24 |
-
1979
- 1979-11-12 JP JP1979157469U patent/JPS6132672Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4939993A (en) * | 1972-08-25 | 1974-04-15 | ||
| JPS5220692A (en) * | 1975-08-11 | 1977-02-16 | Enzeru Kk | Sanitary napkin |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007181725A (en) * | 2007-03-23 | 2007-07-19 | Uni Charm Corp | Absorbent article using surface structure of continuous filament |
| JP4520475B2 (en) * | 2007-03-23 | 2010-08-04 | ユニ・チャーム株式会社 | Absorbent article using continuous filament surface structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5673820U (en) | 1981-06-17 |
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