JPH0580221B2 - - Google Patents
Info
- Publication number
- JPH0580221B2 JPH0580221B2 JP61009576A JP957686A JPH0580221B2 JP H0580221 B2 JPH0580221 B2 JP H0580221B2 JP 61009576 A JP61009576 A JP 61009576A JP 957686 A JP957686 A JP 957686A JP H0580221 B2 JPH0580221 B2 JP H0580221B2
- Authority
- JP
- Japan
- Prior art keywords
- absorbent
- polymer particles
- fiber web
- superabsorbent polymer
- article according
- 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
- 230000002745 absorbent Effects 0.000 claims description 74
- 239000002250 absorbent Substances 0.000 claims description 74
- 239000000835 fiber Substances 0.000 claims description 50
- 239000002245 particle Substances 0.000 claims description 48
- 229920000247 superabsorbent polymer Polymers 0.000 claims description 37
- 238000009826 distribution Methods 0.000 claims description 21
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 239000000470 constituent Substances 0.000 claims description 5
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 230000002209 hydrophobic effect Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 239000012209 synthetic fiber Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 13
- 238000010521 absorption reaction Methods 0.000 description 11
- 210000001124 body fluid Anatomy 0.000 description 11
- 239000010839 body fluid Substances 0.000 description 10
- 238000009792 diffusion process Methods 0.000 description 10
- 239000002585 base Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000178 monomer Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- -1 furthermore Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- 230000001953 sensory effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010021639 Incontinence Diseases 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、使い捨ておむつ、生理用ナプキン、
失禁パツド、その他の衛生物品用として利用する
ことができる吸収体に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to disposable diapers, sanitary napkins,
This invention relates to an absorbent material that can be used for incontinence pads and other sanitary products.
従来、この種の吸収体として、高吸収性ポリマ
ー粒子を、吸水紙、繊維をゆるく集積させまたは
繊維を結合させたウエブ等の基材上に接着剤を介
してまたは前記粒子に加湿し粘着性を付与して基
材の面方向に連続的または間欠的に固定した複合
体、さらに前記複合体を複数積層したもの、さら
にまた繊維または／および綿状（粉砕）パルプと
混合して形態を賦与したもの等が知られている。
しかし、これら公知のものは、前記粒子の基材に
おける安定性が悪く、前記粒子が基材から脱落し
たり移動偏在したりし、また体液拡散性が悪く、
前記粒子の有効利用ができないといつた多くの問
題点を有している。
Conventionally, as this type of absorbent material, superabsorbent polymer particles are placed on a base material such as water-absorbing paper, a web made by loosely accumulating fibers or a web made by bonding fibers, etc. via an adhesive or by humidifying the particles to make them sticky. composites that are fixed continuously or intermittently in the surface direction of a base material, furthermore, composites that are laminated with multiple layers of the above-mentioned composites, and furthermore, that are mixed with fibers or/and flocculent (pulverized) pulp to give a shape. Those who have done so are known.
However, in these known methods, the stability of the particles in the base material is poor, the particles fall off from the base material or are unevenly distributed, and the body fluid diffusivity is poor.
There are many problems such as the inability to utilize the particles effectively.
最近、かかる問題点を解決するため、繊維ウエ
ブ中に高吸収性ポリマー成分のモノマー水溶液を
繊維質基材に含浸させたのち該モノマーを重合さ
せる吸収体の製法が、例えば、特開昭60−149609
号公報において提案されている。 Recently, in order to solve this problem, an absorbent manufacturing method has been developed in which a fibrous base material is impregnated with an aqueous monomer solution of a superabsorbent polymer component in a fiber web, and then the monomer is polymerized. 149609
It is proposed in the publication No.
前記提案にかかる吸収体は、モノマー水溶液を
重合、乾燥させることによりポリマーを基材中に
一体的に固定することから、前記ポリマーの基材
中における安定性はきわめて良好である。しか
し、それがため、しかも基材の全域にわたり均一
に前記ポリマーを存在させてあるため、衛生物品
の吸収体として用いるのには剛性が高すぎ、しか
も体液の拡散方向性がないため、前記ポリマーの
有効利用が改善されず、甚だ不経済であるといつ
たいまだ多くの問題点がある。
In the absorbent body according to the above proposal, the polymer is integrally fixed in the base material by polymerizing and drying an aqueous monomer solution, and therefore, the stability of the polymer in the base material is extremely good. However, because of this, and because the polymer is uniformly present over the entire area of the base material, the rigidity is too high to be used as an absorbent material for sanitary articles, and there is no directionality in the diffusion of body fluids. There are still many problems, such as the fact that the effective use of energy has not been improved and it is extremely uneconomical.
（発明の目的）
本発明は、主として、前記提案にかかるがごと
き吸収体の前記問題点を解決して、吸収性衛生物
品として良好な剛軟度、体液拡散方向性、経済性
等の利点を有する吸収体を提供することにある。
(Objective of the Invention) The present invention mainly solves the above-mentioned problems of the absorbent body as proposed above, and provides advantages such as good bending resistance, directionality of bodily fluid diffusion, and economic efficiency as an absorbent sanitary article. The object of the present invention is to provide an absorbent body having the following properties.
（発明の構成）
本発明は、前記目的を達成するため繊維ウエブ
中に高吸収性ポリマー粒子が混在する第１吸収層
と、その少なくとも片面に重積した綿状パルプ層
からなる第２吸収層とを含む吸収性衛生物品の吸
収体において、前記第１吸収層は前記高吸収性ポ
リマー粒子が前記繊維ウエブ中に群れを形成して
その面方向に間欠的にかつ厚さ方向に連続的に分
布するとともに繊維に一体的に固定してなること
を特徴とする前記吸収体に存する。(Structure of the Invention) In order to achieve the above object, the present invention comprises a first absorbent layer in which superabsorbent polymer particles are mixed in a fiber web, and a second absorbent layer in which a cotton-like pulp layer is stacked on at least one side of the first absorbent layer. In the absorbent body for an absorbent sanitary article, the first absorbent layer is such that the superabsorbent polymer particles form clusters in the fiber web intermittently in the surface direction and continuously in the thickness direction. The absorbent body is characterized in that the fibers are distributed and integrally fixed to the fibers.
（実施態様）
さらに、本発明を図示の実施態様に基づいて説
明すると、以下のとおりである。(Embodiments) Further, the present invention will be explained based on the illustrated embodiments as follows.
第１図に示すように、吸収体１は、第１吸収層
２と、その上下面に重積した第２吸収層３，４と
を含む。 As shown in FIG. 1, the absorbent body 1 includes a first absorbent layer 2 and second absorbent layers 3 and 4 stacked on the upper and lower surfaces thereof.
第２図ＡないしＣに示すように、第１吸収層２
は，繊維ウエブ５と、高吸収性ポリマー粒子６と
を含む。高吸収性ポリマー粒子６は、繊維ウエブ
５の中に群れを形成してその面方向に間欠的にか
つ厚さ方向に連続的に分布させるとともに繊維に
一体に固定させてある。高吸収性ポリマー粒子６
が群れを形成して分布する領域７は、第２図Ａに
おいては、繊維ウエブ５の幅方向に間隔をおきか
つ長さ方向に連続する縦縞模様をなし、第２図Ｂ
においては、第２図Ａの縦縞領域が波模様をな
し、第２図Ｃにおいては、第２図Ａの縦縞状領域
が長さ方向に幅方向の間隔よりも長く断続する模
様をなしている。 As shown in FIGS. 2A to 2C, the first absorption layer 2
includes a fibrous web 5 and superabsorbent polymer particles 6. The superabsorbent polymer particles 6 form clusters in the fiber web 5, are distributed intermittently in the surface direction and continuously in the thickness direction, and are integrally fixed to the fibers. Super absorbent polymer particles 6
In FIG. 2A, the region 7 where the fibers are distributed in clusters forms a vertical striped pattern spaced apart in the width direction of the fiber web 5 and continuous in the length direction, and in FIG. 2B.
In FIG. 2A, the vertical striped regions in FIG. 2A form a wave pattern, and in FIG. 2C, the vertical striped regions in FIG. .
高吸収性ポリマー粒子の分布領域７の長さと幅
の方向におけるピツチは10〜50mm、好ましくは25
〜40mmである。また繊維ウエブ５に対する高吸収
性ポリマー粒子６の分布量は、繊維ウエブ５の重
量の１〜6.25倍、具体的には15〜500g／m2、好ま
しくは40〜300g／m2である。前記ピツチが10mm
以下、前記分布量が500g／m2以上であると、第
１吸収層２の剛性が身体に当接する衛生物品用と
しては高くなり、圧縮復元性が悪くなり、かつ、
第１吸収層２中における高吸収性ポリマー粒子６
の吸液時の膨脹許容空隙率が低くなる。また前記
ピツチが50mm以上、前記分布量が15g／m2以下で
あると、体液の吸収容量が少なくなり、高吸収性
ポリマー粒子６を用いた効果を十分に奏しない。
なお、高吸収性ポリマー粒子の分布領域７の対向
端の間隔、すなわち、非分布領域８の幅または長
さは３mm以上であることが好ましい。 The pitch in the length and width direction of the superabsorbent polymer particle distribution region 7 is 10 to 50 mm, preferably 25 mm.
~40mm. The distribution amount of the superabsorbent polymer particles 6 in the fiber web 5 is 1 to 6.25 times the weight of the fiber web 5, specifically 15 to 500 g/m 2 , preferably 40 to 300 g/m 2 . The pitch is 10mm
Hereinafter, if the distribution amount is 500 g/m 2 or more, the rigidity of the first absorbent layer 2 will be high for sanitary articles that come into contact with the body, and the compression recovery property will be poor, and
Super absorbent polymer particles 6 in the first absorbent layer 2
The allowable porosity for expansion during liquid absorption becomes lower. Further, if the pitch is 50 mm or more and the distribution amount is 15 g/m 2 or less, the absorption capacity for body fluids will be reduced, and the effect of using the superabsorbent polymer particles 6 will not be sufficiently achieved.
The distance between the opposing ends of the superabsorbent polymer particle distribution region 7, that is, the width or length of the non-distribution region 8, is preferably 3 mm or more.
高吸収性ポリマー粒子６は、第３図および第４
図に示すように、分布領域７において間欠的にか
つ実質的に均一分布するとともに、繊維間、繊維
交差部や非交差部に繊維の一部の周囲を包みまた
は包まない状態で一体的に結合している。 The superabsorbent polymer particles 6 are shown in FIGS.
As shown in the figure, it is distributed intermittently and substantially uniformly in the distribution region 7, and is integrally bonded between fibers, at fiber intersections and non-intersections, with or without wrapping around some of the fibers. are doing.
繊維ウエブ５は、目付が15〜80g／m2、好まし
くは25〜40g／m2である。目付が15g／m2以下で
あると、所要の高吸収性ポリマー粒子６を支持さ
せ、かつ所要の弾性（クツシヨン）を付与するこ
とができない。また目付が80g／m2以上である
と、高吸収性ポリマー粒子６の使用量を少なくせ
ざるをえず、それを用いる効果を十分に奏しな
い。 The fiber web 5 has a basis weight of 15 to 80 g/m 2 , preferably 25 to 40 g/m 2 . If the basis weight is less than 15 g/m 2 , it is not possible to support the required superabsorbent polymer particles 6 and provide the required elasticity (cushion). Moreover, if the basis weight is 80 g/m 2 or more, the amount of superabsorbent polymer particles 6 used must be reduced, and the effect of using them will not be sufficiently achieved.
第１吸収層２、すなわち、繊維ウエブ５に高吸
収性ポリマー粒子６を分布させたものは、乾燥状
態において、圧縮復元率が30％以上、好ましくは
50％以上である。圧縮復元率が30％以下である
と、着用者に剛性感を与え、繊維ウエブ５の繊維
間や高吸収性ポリマー粒子６間の所定空隙率が低
下して体液吸収容量が少なくなり、かつ、通気性
も低下する。 The first absorbent layer 2, that is, the one in which superabsorbent polymer particles 6 are distributed in the fiber web 5, has a compression recovery rate of 30% or more in a dry state, preferably
50% or more. If the compression recovery rate is 30% or less, the wearer will feel stiff, the predetermined porosity between the fibers of the fiber web 5 and the superabsorbent polymer particles 6 will decrease, and the body fluid absorption capacity will decrease, and Breathability also decreases.
繊維ウエブ５の構成繊維は、コツトン・レーヨ
ン等の親水性繊維、ポリエステル・ポリプロピレ
ン等の疎水性繊維の単独または混合物からなる。
第１吸収層２における体液の浸透性、湿潤下の圧
縮復元性等を向上させるためには、表面を親水化
した合成繊維、特にそのポリエステル繊維を適宜
量を含むことが好ましい。また前記圧縮復元性を
向上させるためには、繊度は3d以上、好ましく
は５〜15dである。繊維ウエブ５の形態として
は、繊維をゆるく集積したもの、繊維を高速水流
噴射処理やニードリング処理で交絡させ、または
熱溶融で接合することにより、シート状化した不
織布を好適に用いることができる。なお、繊維ウ
エブ５の密度は0.01〜0.5g／cm3ものが好ましい
が、特に限定されない。 The constituent fibers of the fibrous web 5 are hydrophilic fibers such as cotton and rayon, and hydrophobic fibers such as polyester and polypropylene, either singly or in combination.
In order to improve the permeability of body fluids, compression recovery properties under wet conditions, etc. in the first absorbent layer 2, it is preferable to include an appropriate amount of synthetic fibers whose surfaces are made hydrophilic, particularly polyester fibers thereof. Further, in order to improve the compression recovery property, the fineness is 3 d or more, preferably 5 to 15 d. As the form of the fibrous web 5, it is possible to suitably use a loosely accumulated fiber, a nonwoven fabric formed into a sheet by intertwining the fibers by high-speed water jet treatment or needling treatment, or joining them by heat melting. . Note that the density of the fiber web 5 is preferably 0.01 to 0.5 g/cm 3 , but is not particularly limited.
高吸収性ポリマー粒子６は、例えば、澱粉のグ
ラフト重合体、セルロース変性物、水溶性高分子
の架橋物、自己架橋型アクリル酸アルカリ金属塩
ポリマー等、従来、吸収性衛生物品や園芸用の吸
収性材料等として知られているものを用いること
ができるが、特に限定されない。 The superabsorbent polymer particles 6 may be made of, for example, a graft polymer of starch, a cellulose modified product, a crosslinked product of a water-soluble polymer, a self-crosslinking type alkali metal acrylate polymer, etc. Although it is possible to use materials known as flexible materials, there are no particular limitations.
前述のような第１吸収層２は、高吸収性ポリマ
ー粒子６の成分、例えば、アクリル酸またはアク
リル酸／メタクリル酸の混合物のアルカリ金属塩
またはアンモニユウム塩を含むモノマーの水溶液
に水溶性ラジカル重合開始剤を溶解させてこれを
スプレーノズルにより繊維ウエブ５に前記模様状
に噴霧含浸させたのち、重合、乾燥させることに
より製造することができる。 The first absorbent layer 2 as described above is formed by initiating water-soluble radical polymerization in an aqueous solution of a monomer containing a component of the superabsorbent polymer particles 6, for example, an alkali metal salt or an ammonium salt of acrylic acid or a mixture of acrylic acid/methacrylic acid. It can be manufactured by dissolving the agent and spraying it into the fiber web 5 in the pattern described above using a spray nozzle, followed by polymerization and drying.
第２吸収層３，４は、綿状（粉砕）パルプから
なり、その目付は物品の種類によつて異なるが、
両者合計で100〜650g／m2であることが好まし
い。また第２吸収層３，４は、物品によつては、
その一方、特に上部のものだけである場合もあ
り、その場合の目付は30〜350g／m2であること
が好ましい。また目的とする吸収機構の採択に当
つては、第１吸収体２、第２吸収層３，４の少な
くとも一つに加湿してまたは加湿せずにエンボス
を賦与し、または全面プレスすることもある。た
だし、高吸収性ポリマー粒子を繊維ウエブに混在
させた吸収層の片面または両面に綿状パルプ層を
重積することは公知であるので、本発明はそのよ
うな構成自体を新規とするものではない。 The second absorbent layers 3 and 4 are made of flocculent (pulverized) pulp, and the basis weight thereof varies depending on the type of article, but
The total amount of both is preferably 100 to 650 g/m 2 . Further, depending on the article, the second absorbent layers 3 and 4 may be
On the other hand, there are cases in which only the upper part is used, and in that case, the basis weight is preferably 30 to 350 g/m 2 . In addition, when selecting the desired absorption mechanism, at least one of the first absorbent body 2 and the second absorbent layers 3 and 4 may be embossed with or without humidification, or the entire surface may be pressed. be. However, since it is known that a cotton-like pulp layer is stacked on one or both sides of an absorbent layer in which superabsorbent polymer particles are mixed in a fiber web, the present invention does not propose such a structure as new. do not have.
第１図に示すような高吸収性ポリマー粒子の分
布模様と構造を有する吸収体を既述の製法により
得た。
An absorbent body having the distribution pattern and structure of superabsorbent polymer particles as shown in FIG. 1 was obtained by the above-mentioned manufacturing method.
全体の大きさ 縦370mm×幅140mm
繊維ウエブ 40g／m2
高吸収性ポリマー粒子 280g／m2
上部綿状パルプ層 130g／m2
下部綿状パルプ層 150g／m2
高吸収性ポリマー粒子の分布領域の幅 20mm
高吸収性ポリマー粒子の非分布領域の幅 10mm
比較例として、高吸収性ポリマー粒子を繊維ウ
エブの全体に均一に分布させた吸収体を得た以外
は、前記実施例と同条件とした。 Overall size Length 370 mm x Width 140 mm Fiber web 40 g/m 2 Super absorbent polymer particles 280 g/m 2 Upper cotton pulp layer 130 g/m 2 Lower cotton pulp layer 150 g/m 2 Distribution area of super absorbent polymer particles Width of 20mm Width of non-distribution area of superabsorbent polymer particles 10mm As a comparative example, the same conditions as in the previous example were used, except that an absorbent body in which superabsorbent polymer particles were uniformly distributed throughout the fiber web was obtained. did.
実施例、比較例の各吸収体を38.1mm×50mmにカ
ツトし、それらの剛軟度、体液拡散方向性を測定
した。剛軟度は、手で触わる官能評価と、テーバ
ーステイフネステスター（K.K.社安田精機製造
所）でJIS−Ｐ−8125に準拠する測定とによつた。
また実施例、比較例の各吸収体（370mm×140mm）
の液体拡散方向性は、それらの上部から生理食塩
水40c.c.を投入し、５分間放置したのち、再び同一
個所に同水40c.c.を投入し、５分間放置したのち、
液体の拡散状態を測定した。 Each of the absorbent bodies of Examples and Comparative Examples was cut into 38.1 mm x 50 mm, and their bending resistance and body fluid diffusion directionality were measured. The bending resistance was determined by sensory evaluation by touch and by measurement using a Taber stiffness tester (KK Yasuda Seiki Manufacturing Co., Ltd.) in accordance with JIS-P-8125.
Also, each absorber of Examples and Comparative Examples (370mm x 140mm)
The liquid diffusion direction is as follows: Pour 40 c.c. of physiological saline from above, leave it for 5 minutes, then pour 40 c.c. of the same water into the same place again, leave it for 5 minutes, and then
The state of liquid diffusion was measured.
比較例 実施例
官能評価 腰があり硬い 柔かい
テスター測定 35.0 5.0
（曲げモーメント、ｇ・cm）
拡散方向性 130×130 110×220
（幅×長さ、mm）
前記性能の比較から、柔かさに関して実施例が
比較例よりも優れており、また前記物品における
横漏れを防止し長さ方向に拡散して吸収体の有効
利用をはかることに関して実施例が比較例よりも
優れていることが判る。 Comparative example Sensory evaluation of the example Stiff and hard Soft tester measurement 35.0 5.0 (Bending moment, g cm) Diffusion directionality 130 x 130 110 x 220 (Width x Length, mm) Based on the above performance comparison, the softness test was carried out. It can be seen that the Examples are superior to the Comparative Examples, and the Examples are superior to the Comparative Examples in preventing lateral leakage in the article and promoting effective utilization of the absorbent body through longitudinal diffusion.
（発明の作用・効果）
上述のように構成してある本発明にかかる吸収
体によれば、第１吸収層は、繊維ウエブ中の全域
に均一に高吸収性ポリマー成分のモノマーを含浸
させたのち、重合、乾燥させることにより、繊維
に固定させた公知の吸収層に比較して、身体に当
接して用いる衛生物品に要求される柔かさが著し
く優れている。また体液は、高吸収性ポリマー粒
子の分布領域においては、隣接する前記粒子間の
吸引作用と繊維による誘導作用とにより前記粒子
の分布領域に沿う面方向（特に長さ方向）と厚さ
方向に拡散吸収されるが、そして、単にそのよう
な拡散吸収状態であれば、比較的に拡散吸収速度
が遅く、吸収容量も少ないが、さらに体液は、前
記粒子の非分布領域を素早く透過して前記粒子の
分布領域の厚さ方向に交差する方向である側面か
らも吸収されるので、前記拡散吸収速度が著しく
高くなり、そのため前記粒子を有効に利用するこ
とができるとともに、前記粒子の少ない使用量で
吸収性能を著しく向上させることができ、またそ
のためきわめて経済的である。(Operations and Effects of the Invention) According to the absorbent body according to the present invention configured as described above, the first absorbent layer has a monomer of a superabsorbent polymer component uniformly impregnated throughout the fiber web. By subsequently polymerizing and drying, the absorbent layer is significantly superior in softness, which is required for sanitary articles used in contact with the body, compared to known absorbent layers fixed to fibers. In addition, in the distribution area of superabsorbent polymer particles, body fluids are absorbed in the surface direction (particularly the length direction) and the thickness direction along the distribution area of the particles due to the suction effect between the adjacent particles and the guiding effect by the fibers. However, if the body fluid is simply in such a state of diffusion absorption, the diffusion absorption rate is relatively slow and the absorption capacity is small. Since the particles are also absorbed from the side surface, which is the direction intersecting the thickness direction of the distribution area of the particles, the rate of diffusion and absorption is significantly increased, which makes it possible to utilize the particles effectively and reduce the amount of particles used. It is possible to significantly improve the absorption performance with this method, and it is therefore extremely economical.
なお、第２吸収層は、エンボスや全面プレスし
てない場合は、吸収体はさらに柔軟性を付与する
とともに体液を局部的に吸収して第１吸収層に移
行させ、一方、エンボスや全面プレスしてある場
合には、体液を面方向に拡散させて第１吸収層に
移行させるから、吸収体に付与しようとする柔軟
性、吸収機構を適宜調整ないし制御することがで
きる。 In addition, if the second absorbent layer is not embossed or fully pressed, the absorbent body will have more flexibility and will locally absorb body fluids and transfer to the first absorbent layer; In this case, the body fluid is diffused in the surface direction and transferred to the first absorbent layer, so that the flexibility and absorption mechanism to be imparted to the absorbent body can be adjusted or controlled as appropriate.
したがつて、本発明にかかる吸収体は、吸収性
衛生物品のそれとしてまことに好適である。 Therefore, the absorbent body according to the present invention is truly suitable as an absorbent sanitary article.
図面は本発明にかかる吸収体の実施態様を模式
的に示すもので、第１図は一部を切欠した吸収体
の斜視図、第２図ＡないしＣは高吸収性ポリマー
粒子の分布領域の形態を示す平面図、第３図は第
１図Ｘ−Ｘ線拡大断面図、第４図は前記粒子の分
布領域の拡大図。
１……吸収体、２……第１吸収層、３，４……
第２吸収層、５……繊維ウエブ、６……高吸収性
ポリマー粒子、７……該粒子の分布領域、８……
該粒子の非分布領域。
The drawings schematically show embodiments of the absorbent body according to the present invention. Figure 1 is a partially cutaway perspective view of the absorbent body, and Figures 2 A to C are diagrams showing the distribution area of superabsorbent polymer particles. FIG. 3 is an enlarged sectional view taken along the line X-X in FIG. 1, and FIG. 4 is an enlarged view of the distribution area of the particles. 1... Absorber, 2... First absorbent layer, 3, 4...
Second absorbent layer, 5... Fibrous web, 6... Super absorbent polymer particles, 7... Distribution area of the particles, 8...
Non-distribution area of the particles.
Claims (1)
する第１吸収層と、その少なくとも片面に重積し
た綿状パルプからなる第２吸収層とを含む吸収性
衛生物品の吸収体において、前記第１吸収層は前
記高吸収性ポリマー粒子が前記繊維ウエブ中に群
れを形成してその面方向に間欠的にかつ厚さ方向
に連続的に分布するとともに繊維に一体的に固定
していることを特徴とする前記吸収体。 ２ 高吸収性ポリマー粒子の分布領域は繊維ウエ
ブの幅方向に間隔をおきかつ長さ方向に連続する
縦縞模様をなす特許請求の範囲第１項記載の吸収
体。 ３ 高吸収性ポリマー粒子の分布領域は繊維ウエ
ブの幅方向に間隔をおきかつ長さ方向に該間隔よ
りも長く断続的に延びる模様をなす特許請求の範
囲第１項記載の吸収体。 ４ 高吸収性ポリマー粒子の分布領域はピツチは
10〜50mmである特許請求の範囲第１項記載の吸収
体。 ５ 繊維ウエブに対する高吸収性ポリマー粒子の
分布量は前記繊維ウエブの重量の１〜6.25倍であ
る特許請求の範囲第１項記載の吸収体。 ６ 繊維ウエブは目付が15〜80g／m2である特許
請求の範囲第１項記載の吸収体。 ７ 高吸収性ポリマー粒子は分布量が15〜
500g／m2である特許請求の範囲第１項記載の吸
収体。 ８ 高吸収性ポリマー粒子が分布結合する状態の
繊維ウエブは乾燥状態における圧縮復元率が少な
くとも30％である特許請求の範囲第１項記載の吸
収体。 ９ 繊維ウエブは構成繊維が親水性・疎水性繊維
の単独または混合物である特許請求の範囲第１項
記載の吸収体。 １０ 繊維ウエブは構成繊維として表面を親水化
処理した合成繊維を含む特許請求の範囲第１項記
載の吸収体。 １１ 繊維ウエブは構成繊維がゆるく集積したも
のである特許請求の範囲第１項記載の吸収体。 １２ 繊維ウエブは構成繊維が交絡してシート状
形態を賦与された不織布である特許請求の範囲第
１項記載の吸収体。 １３ 繊維ウエブは構成繊維が融着してシート状
形態を賦与された不織布である特許請求の範囲第
１項記載の吸収体。 １４ 第２吸収層は目付が30〜350g／m2である
特許請求の範囲第１項記載の吸収体。 １５ 第２吸収層は第１吸収層の上面に位置して
いる特許請求の範囲第１項記載の吸収体。 １６ 第２吸収層は第１吸収層の上下面に位置
し、かつ、その上下の第２吸収層の合計目付は
100〜650g／m2である特許請求の範囲第１項記載
の吸収体。[Claims] 1. Absorbent sanitary article comprising a first absorbent layer in which superabsorbent polymer particles are mixed in a fibrous web, and a second absorbent layer made of cotton-like pulp stacked on at least one side of the first absorbent layer. In the first absorbent layer, the superabsorbent polymer particles form clusters in the fiber web, are distributed intermittently in the surface direction and continuously in the thickness direction, and are integrally fixed to the fibers. The absorbent body is characterized in that: 2. The absorbent article according to claim 1, wherein the distribution regions of the superabsorbent polymer particles form a vertical striped pattern spaced apart in the width direction of the fiber web and continuous in the length direction. 3. The absorbent article according to claim 1, wherein the distribution regions of the superabsorbent polymer particles form a pattern that is spaced apart in the width direction of the fibrous web and intermittently extends longer than the spacing in the length direction. 4 The pitch of the distribution area of superabsorbent polymer particles is
The absorbent body according to claim 1, which has a diameter of 10 to 50 mm. 5. The absorbent article according to claim 1, wherein the amount of superabsorbent polymer particles distributed in the fiber web is 1 to 6.25 times the weight of the fiber web. 6. The absorbent article according to claim 1, wherein the fiber web has a basis weight of 15 to 80 g/ m2 . 7 Super absorbent polymer particles have a distribution volume of 15~
The absorbent body according to claim 1, which has a weight of 500 g/m 2 . 8. The absorbent article according to claim 1, wherein the fibrous web in which the superabsorbent polymer particles are distributed and bonded has a compression recovery rate of at least 30% in a dry state. 9. The absorbent body according to claim 1, wherein the fiber web is composed of hydrophilic/hydrophobic fibers alone or in a mixture. 10. The absorbent body according to claim 1, wherein the fiber web includes synthetic fibers whose surfaces have been subjected to hydrophilic treatment as constituent fibers. 11. The absorbent article according to claim 1, wherein the fiber web is a loose collection of constituent fibers. 12. The absorbent article according to claim 1, wherein the fibrous web is a nonwoven fabric in which constituent fibers are intertwined to give a sheet-like shape. 13. The absorbent article according to claim 1, wherein the fiber web is a nonwoven fabric in which constituent fibers are fused and given a sheet-like shape. 14. The absorbent body according to claim 1, wherein the second absorbent layer has a basis weight of 30 to 350 g/m 2 . 15. The absorbent body according to claim 1, wherein the second absorbent layer is located on the upper surface of the first absorbent layer. 16 The second absorbent layer is located on the upper and lower surfaces of the first absorbent layer, and the total basis weight of the upper and lower second absorbent layers is
The absorbent body according to claim 1, which has a weight of 100 to 650 g/m 2 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61009576A JPS62170247A (en) | 1986-01-20 | 1986-01-20 | Absorbing material of absorbable sanitary article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61009576A JPS62170247A (en) | 1986-01-20 | 1986-01-20 | Absorbing material of absorbable sanitary article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62170247A JPS62170247A (en) | 1987-07-27 |
| JPH0580221B2 true JPH0580221B2 (en) | 1993-11-08 |
Family
ID=11724137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61009576A Granted JPS62170247A (en) | 1986-01-20 | 1986-01-20 | Absorbing material of absorbable sanitary article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62170247A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5098775A (en) * | 1989-03-29 | 1992-03-24 | Nippon Shokubai Kagaku Kogyo Co., Ltd. | Body fluid-absorbing article |
| US6420626B1 (en) * | 1999-06-08 | 2002-07-16 | Buckeye Technologies Inc. | Unitary fluid acquisition, storage, and wicking material |
| JP5000198B2 (en) * | 2006-05-30 | 2012-08-15 | 旭化成ケミカルズ株式会社 | Absorber and body fluid absorbent article with little leakage |
| JP6903810B1 (en) * | 2020-12-01 | 2021-07-14 | 株式会社瑞光 | Manufacturing method of worn goods |
| JP6903809B1 (en) * | 2020-12-01 | 2021-07-14 | 株式会社瑞光 | Items to wear |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5536321A (en) * | 1978-09-01 | 1980-03-13 | Johnson & Johnson | Improved absorbing fiber panel |
| JPS59204975A (en) * | 1983-04-18 | 1984-11-20 | パ−ソナル・プロダクツ・カンパニ− | Production of absorbable composite |
| US4559050A (en) * | 1984-08-17 | 1985-12-17 | Personal Products Company | Thin, soft, absorbent product |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1981003274A1 (en) * | 1980-05-12 | 1981-11-26 | Johnson & Johnson | Absorbent composite |
-
1986
- 1986-01-20 JP JP61009576A patent/JPS62170247A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5536321A (en) * | 1978-09-01 | 1980-03-13 | Johnson & Johnson | Improved absorbing fiber panel |
| JPS59204975A (en) * | 1983-04-18 | 1984-11-20 | パ−ソナル・プロダクツ・カンパニ− | Production of absorbable composite |
| US4559050A (en) * | 1984-08-17 | 1985-12-17 | Personal Products Company | Thin, soft, absorbent product |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62170247A (en) | 1987-07-27 |
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