JP3154286B2 - Hygroscopic nonwoven fabric - Google Patents
Hygroscopic nonwoven fabricInfo
- Publication number
- JP3154286B2 JP3154286B2 JP1804393A JP1804393A JP3154286B2 JP 3154286 B2 JP3154286 B2 JP 3154286B2 JP 1804393 A JP1804393 A JP 1804393A JP 1804393 A JP1804393 A JP 1804393A JP 3154286 B2 JP3154286 B2 JP 3154286B2
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- weight
- hygroscopic
- monomer
- carboxylic acid
- 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 - Fee Related
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- Nonwoven Fabrics (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は吸湿性不織布に関する。The present invention relates to a hygroscopic nonwoven fabric.
【0002】[0002]
【従来の技術】不織布は既に種々のものが提案されてい
るが、吸湿性が高く、吸放湿性を備えたものはまだな
い。例えば特開昭60−146004号公報に開示され
ているコットンやウールは比較的高い吸湿性を示すが不
十分である。一方、天然の皮革は優れた吸放湿性を示
し、靴,衣料等に多く用いられている。しかし、自然保
護の観点からも天然の皮革に多くを頼ることは許されな
い。また、天然皮革は加工方法により立体的に成形する
ことができるが、伸縮性の無い不織布では立体的な成形
が出来ない。2. Description of the Related Art Various nonwoven fabrics have already been proposed, but none of them have high hygroscopicity and have hygroscopicity. For example, cotton and wool disclosed in JP-A-60-146004 show relatively high hygroscopicity but are insufficient. On the other hand, natural leather exhibits excellent moisture absorption and release properties, and is widely used in shoes, clothing and the like. However, from the viewpoint of nature protection, it is not permissible to rely on natural leather. In addition, natural leather can be three-dimensionally formed by a processing method, but three-dimensional molding cannot be performed with a non-stretchable nonwoven fabric.
【0003】そこで、吸湿性が不足するため透湿性を強
化した不織布、織編物も既に市販されているが、吸湿性
には及ばない。また、不織布が吸湿性に富み、汗をかい
たときには吸汗すればさらによい。[0003] Non-woven fabrics and woven / knitted fabrics having enhanced moisture permeability due to insufficient moisture absorption are already on the market, but they are inferior to moisture absorption. In addition, it is more preferable that the nonwoven fabric is rich in hygroscopicity and absorbs sweat when sweating.
【0004】[0004]
【発明が解決しようとする課題】本発明の目的は、天然
の皮革に代替し得る安価な吸湿性不織布を提供するにあ
る。SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive hygroscopic nonwoven fabric which can be replaced with natural leather.
【0005】[0005]
【課題を解決するための手段】本発明者らは水に対する
吸水性が高く、吸湿性も高い高吸湿高吸水性繊維を用
い、その調合や形態を研究し本発明の完成に至った。Means for Solving the Problems The present inventors have studied high-absorbency and high-absorbency fibers which have high water absorbency and high water absorbency with respect to water, and have studied the preparation and form thereof to complete the present invention.
【0006】本発明の吸湿性不織布は30℃、相対湿度
80%下での吸湿性が30重量%以上であり、生理食塩
水を1200重量%以上、3000重量%未満吸水する
カルボン酸基を持つモノマーと、カルボン酸基と反応し
て架橋結合を形成し得るヒドロキシル基及び/又はアミ
ノ基を持つモノマーと、カルボン酸アルカリ金属塩基を
持つモノマーを共重合し、熱により架橋した高吸水性繊
維を10〜50重量%含有し、不織布を構成する繊維が
相互にゴムにより接着され、10%以上の伸縮弾性率を
持つことを特徴とする。[0006] hygroscopicity nonwoven fabric of the present invention is 30 ° C., Ri der hygroscopicity 30% by weight or more at 80% relative humidity, saline
Absorbs water from 1200 wt% to less than 3000 wt%
Reacts with a monomer having a carboxylic acid group
Hydroxyl groups and / or amino groups capable of forming
Monomer with a carboxylic acid group and an alkali metal carboxylate
Contains 10 to 50% by weight of superabsorbent fibers cross-linked by heat by copolymerizing the monomer having the fibers, and the fibers constituting the nonwoven fabric are bonded to each other by rubber , and have an elastic modulus of 10% or more.
It is characterized by having .
【0007】また、本発明の吸湿性不織布は、30℃、
相対湿度80%下での吸湿性が30重量%以上であり、
生理食塩水を1200重量%以上、3000重量%未満
吸水するカルボン酸基を持つモノマーと、カルボン酸基
と反応して架橋結合を形成し得るヒドロキシル基及び/
又はアミノ基を持つモノマーと、カルボン酸アルカリ金
属塩基を持つモノマーを共重合し、熱により架橋した高
吸水性繊維を10〜50重量%含有し、芯地が20%以
上の伸縮性(例えば99%の伸長回復率を有する)を持
つ不織布であり、10%以上の伸縮弾性率を持つことを
特徴とする。ここでいう伸縮弾性率は、伸長したときに
80%以上の回復率を示す伸長率を意味する。Further, the hygroscopic nonwoven fabric of the present invention has a temperature of 30 ° C.
Ri der hygroscopicity 30% by weight or more at 80% relative humidity,
1200% by weight or more and less than 3000% by weight of physiological saline
A monomer having a carboxylic acid group that absorbs water and a carboxylic acid group
Hydroxyl groups which can react with
Or a monomer having an amino group and an alkali gold carboxylate
Nonwoven fabric containing 10-50% by weight of superabsorbent fibers crosslinked by heat by copolymerizing a monomer having a genus base and having an interlining of 20% or more (for example, having a 99% elongation recovery rate) And has an elastic modulus of 10% or more. The term “elastic modulus” as used herein means an elongation rate that indicates a recovery rate of 80% or more when stretched.
【0008】本発明に用いる高吸水繊維は30℃、相対
湿度80%下での吸湿性が30重量%以上である。ま
た、高吸水繊維がカルボン酸基を持つモノマーと、カル
ボン酸基と反応して架橋結合を形成し得るヒドロキシル
基及び/又はアミノ基を持つモノマーと、カルボン酸ア
ルカリ金属塩基を持つモノマーを共重合し、熱により架
橋した繊維で、且つ生理食塩水を1200重量%以上、
3000重量%未満吸水する。また好ましくは、吸湿性
不織布の片面がフィルム、又は多孔性ウレタンコーティ
ング不織布、又は他の不織布と複合されていることを特
徴とする。The superabsorbent fiber used in the present invention has a moisture absorbency of 30% by weight or more at 30 ° C. and a relative humidity of 80%. Ma
In addition , copolymerization of a monomer having a carboxylic acid group, a monomer having a hydroxyl group and / or an amino group capable of forming a cross-linking by reacting with the carboxylic acid group, and a monomer having an alkali metal carboxylate is performed. And a fiber cross-linked by heat, and a physiological saline of 1200% by weight or more,
It absorbs less than 3000% by weight of water. Also preferably, one side of the hygroscopic nonwoven fabric is combined with a film, a porous urethane-coated nonwoven fabric, or another nonwoven fabric.
【0009】本発明に用いる高吸水繊維のカルボン酸基
を持つモノマーとしては、例えばアクリル酸(以下「A
A」と略記する。),メタクリル酸,マレイン酸等が用
いられる。As the monomer having a carboxylic acid group of the superabsorbent fiber used in the present invention, for example, acrylic acid (hereinafter referred to as "A
A ". ), Methacrylic acid, maleic acid, and the like.
【0010】カルボン酸アルカリ金属塩基を持つモノマ
ーとしては、例えばAA,メタクリル酸,マレイン酸等
のアルカリ金属塩が用いられる。アルカリ金属としては
ナトリウム(以下「Na」と略記する。),カリウム等
が用いられる。カルボン酸基を持つモノマーとカルボン
酸アルカリ金属塩基を持つモノマーとの割合は1/1〜
1/10が好ましい。カルボン酸基を持つモノマーとカ
ルボン酸アルカリ金属塩基を持つモノマーの合計は、通
常70重量%〜99.5重量%含まれる。好ましくは8
0重量%以上である。70重量%未満では生理食塩水の
吸水率及び吸湿率が不足する。As the monomer having an alkali metal carboxylate, for example, alkali metal salts such as AA, methacrylic acid and maleic acid are used. As the alkali metal, sodium (hereinafter abbreviated as "Na"), potassium and the like are used. The ratio of the monomer having a carboxylic acid group to the monomer having a carboxylic acid alkali metal base is 1/1 to 1
1/10 is preferred. The total of the monomer having a carboxylic acid group and the monomer having a carboxylic acid alkali metal base is usually 70% by weight to 99.5% by weight. Preferably 8
0% by weight or more. If it is less than 70% by weight, the water absorption and the water absorption of the physiological saline are insufficient.
【0011】ヒドロキシル基を持つモノマーとしては、
例えばヒドロキシエチルメタクリレート(以下「HEM
A」と略記する。),ヒドロキシプロピルメタクリレー
ト,ヒドロキシエチルアクリレート,ヒドロキシプロピ
ルアクリレート,グリセリルモノメタクリレート,グリ
セリルモノアクリレート等が用いられる。As the monomer having a hydroxyl group,
For example, hydroxyethyl methacrylate (hereinafter "HEM")
A ". ), Hydroxypropyl methacrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, glyceryl monomethacrylate, glyceryl monoacrylate, and the like.
【0012】アミノ基を持つモノマーは、例えばジメチ
ルアミノエチルアクリレート(以下「AEA」と略記す
る。),ジエチルアミノエチルアクリレート,ジエチル
アミノイソプロピルメタクリレート等がある。Examples of the monomer having an amino group include dimethylaminoethyl acrylate (hereinafter abbreviated as "AEA"), diethylaminoethyl acrylate, diethylaminoisopropyl methacrylate and the like.
【0013】これらのモノマーは各々複数の種類で用い
てもよい。ヒドロキシル基及び/又はアミノ基を持つモ
ノマーはフリーのアクリル酸と当量以下で、通常0.5
重量%以上含まれる。0.5重量%未満では架橋が不足
する。Each of these monomers may be used in a plurality of types. The monomer having a hydroxyl group and / or an amino group is not more than an equivalent of free acrylic acid,
% By weight or more. If it is less than 0.5% by weight, crosslinking is insufficient.
【0014】上記のモノマー以外に可塑性を付与するた
めに他のビニルモノマー、例えば酢酸ビニル(以下「V
A」と略記する。),アクリロニトリル等を用いてもよ
い。可塑化のためのモノマーの量は30重量%以下であ
る。In addition to the above monomers, other vinyl monomers such as vinyl acetate (hereinafter referred to as "V
A ". ), Acrylonitrile and the like may be used. The amount of monomer for plasticization is not more than 30% by weight.
【0015】本発明に用いる重合方法は特に限定はしな
いが、モノマー組成が水溶性であれば水系重合すればよ
い。重合開始剤には一般に用いる過硫酸ナトリウム等を
用いればよい。The polymerization method used in the present invention is not particularly limited, but water-based polymerization may be used as long as the monomer composition is water-soluble. Sodium persulfate, which is generally used, may be used as the polymerization initiator.
【0016】本発明に用いる紡糸方法は一般的な乾式紡
糸が好ましい。湿式紡糸の場合は、凝固剤に水を使用で
きないので有機溶剤系で用いなければならない。The spinning method used in the present invention is preferably general dry spinning. In the case of wet spinning, water cannot be used as a coagulant and must be used in an organic solvent system.
【0017】例えば乾式紡糸した後、水分が10重量%
以上残ったまま乾熱で1.3倍以上延伸し、次に乾熱で
架橋処理を行う。クリンプ付与、カットを適宜行う。水
分が10重量%以上残ったまま乾熱で1.3倍以上延伸
すると繊維の強度が向上する。分子量の大きい繊維は吸
水量も大きいが、一方、分子量が大きいために延伸しに
くく、分子量が過大であると逆に繊維強度が低くなる。For example, after dry spinning, the water content is 10% by weight.
The film is stretched 1.3 times or more by dry heat while remaining as described above, and then crosslinked by dry heat. Crimping and cutting are appropriately performed. When the fiber is stretched 1.3 times or more by dry heat with 10% by weight or more of water remaining, the fiber strength is improved. Fibers having a large molecular weight have a large water absorption, but on the other hand, are difficult to be stretched due to a large molecular weight, and conversely if the molecular weight is too large, the fiber strength is low.
【0018】上記の方法にて製造した本発明に用いる高
吸水性繊維は、生理食塩水を1200重量%以上吸水す
る。好ましくは1800%以上である。3000重量%
を越えると繊維強度が低下する。また30℃、相対湿度
80%下での吸湿性が30重量%以上である高吸湿性繊
維である。高吸水性繊維の吸湿性が30重量%未満では
不織布の吸湿性が不足する。高吸水性繊維の吸水性が1
200重量%未満では吸水性が不足する。The superabsorbent fiber used in the present invention produced by the above method absorbs 1200% by weight or more of physiological saline. Preferably it is 1800% or more. 3000% by weight
If it exceeds, the fiber strength decreases. It is a highly hygroscopic fiber having a hygroscopicity of 30% by weight or more at 30 ° C. and a relative humidity of 80%. If the hygroscopicity of the superabsorbent fiber is less than 30% by weight, the hygroscopicity of the nonwoven fabric is insufficient. The water absorption of super absorbent fiber is 1
If it is less than 200% by weight, water absorption is insufficient.
【0019】本発明に用いる不織布の製造方法は一般的
な方法でよい。例えばニードルパンチ法、エアレイ法、
熱融着繊維を混綿する方法等でよい。The method for producing the nonwoven fabric used in the present invention may be a general method. For example, needle punch method, air lay method,
A method of blending heat-fused fibers may be used.
【0020】また、ゴムを含浸させ、伸長弾性率を高く
することもできる。ゴムの種類は特に限定はしない。例
えば天然ゴム,合成ゴム、例えばIR,BR,EPM,
IIR,CR,NBR,SBR,ECO,CPE,AC
M等があるがこれに限定するものではない。また、アク
リル系樹脂,ウレタン系樹脂,酢酸ビニル系樹脂等も用
いることができる。伸長性の点では樹脂よりゴムの方が
良い。これらのゴムや樹脂はエマルジョンとして用いる
ことが出来る。樹脂の選定は用途により、弾性,硬さ等
を考慮し適宜選択すべきである。In addition, rubber can be impregnated to increase the elongation modulus. The type of rubber is not particularly limited. For example, natural rubber, synthetic rubber such as IR, BR, EPM,
IIR, CR, NBR, SBR, ECO, CPE, AC
M, but is not limited to this. In addition, acrylic resins, urethane resins, vinyl acetate resins and the like can also be used. Rubber is better than resin in terms of extensibility. These rubbers and resins can be used as emulsions. The selection of the resin should be appropriately selected in consideration of the elasticity, hardness and the like depending on the application.
【0021】ゴムまたは樹脂の量は、不織布重量に対し
て3〜50重量%が好ましい。3重量%未満では付与す
べき性能、例えばゴム弾性,硬さ等が不足する。50重
量%を越えると吸水性、吸湿性を阻害する。The amount of rubber or resin is preferably 3 to 50% by weight based on the weight of the nonwoven fabric. If it is less than 3% by weight, the properties to be imparted, for example, rubber elasticity, hardness, etc., are insufficient. If it exceeds 50% by weight, water absorption and hygroscopicity are impaired.
【0022】本発明に用いる樹脂は一般に市販されてい
る樹脂でよいが、吸水性不織布に樹脂加工するため、エ
マルジョンを吸水量に相当するだけ希釈するか、予め吸
水性不織布に水を適当量含浸させてからエマルジョンを
含浸させないと付着斑を起こし易い。付着させた後、マ
ングル等で絞り、乾燥、ベーキングすればよい。スプレ
ーで含浸させることもできるが、浸漬した方が斑が少な
く好ましい。また、樹脂エマルジョン等に顔料,難燃剤
等を混合し用いることもできる。The resin used in the present invention may be a commercially available resin. In order to process the resin into a water-absorbent nonwoven fabric, the emulsion is diluted to an amount corresponding to the amount of water absorbed, or a suitable amount of water is previously impregnated into the water-absorbent nonwoven fabric. If the emulsion is not impregnated after the formation, adhesion spots are likely to occur. After the adhesion, it may be squeezed with a mangle or the like, dried and baked. It can be impregnated with a spray, but immersion is preferable because it has less unevenness. Further, a pigment, a flame retardant, or the like can be mixed with a resin emulsion or the like.
【0023】本発明の不織布は他の不織布素材等と積層
することもできる。また、弾性のある不織布はその弾性
と熱軟化性を利用し、立体成形もできる。乾燥温度は不
織布に用いる繊維の耐熱性を考慮すべきである。The nonwoven fabric of the present invention can be laminated with other nonwoven fabric materials. Elastic nonwoven fabrics can be three-dimensionally formed by utilizing their elasticity and heat softening properties. The drying temperature should take into account the heat resistance of the fibers used in the nonwoven fabric.
【0024】また、ニードルパンチ法で伸縮性のある不
織布を芯地に用いたものもある。このような不織布は、
例えば溶融タイプのスパンボンドで鐘紡(株)より市販
されている「エスパンシオーネ」がある。ゴムを含浸さ
せる方法と併用してもよい。伸縮回復力が向上する。Further, there is also a method in which an elastic nonwoven fabric is used as an interlining by a needle punch method. Such non-woven fabrics
For example, there is "espansione" which is commercially available from Kanebo Co., Ltd. as a melt-type spunbond. You may use together with the method of impregnating rubber. The elasticity recovery power is improved.
【0025】また、本発明の吸湿性不織布は吸湿性高吸
水性繊維を10〜50重量%含有する。好ましくは20
重量%以上である。より好ましくは30重量%以上であ
る。10重量%未満では実用上、不織布の吸湿、吸水能
力が不足する。50重量%を越えると強度が不足する。The hygroscopic nonwoven fabric of the present invention contains 10 to 50% by weight of a hygroscopic superabsorbent fiber. Preferably 20
% By weight or more. It is more preferably at least 30% by weight. If the content is less than 10% by weight, the moisture absorption and water absorption capabilities of the nonwoven fabric are insufficient for practical use. If it exceeds 50% by weight, the strength is insufficient.
【0026】本発明の吸湿性不織布に用いる特に吸水さ
せる部分の不織布の密度は0.02〜0.10gr/c
m3 程度が好ましい。密度が大きくなりすぎると吸湿
性、吸水性が低下する。密度が小さすぎると強度が不足
する。The density of the non-woven fabric used in the moisture-absorbing non-woven fabric of the present invention, particularly at the portion where water is absorbed, is 0.02 to 0.10 gr / c
About m 3 is preferable. If the density is too high, the hygroscopicity and the water absorption are reduced. If the density is too low, the strength will be insufficient.
【0027】本発明の不織布に用いる熱融着繊維は特に
限定しない。例えば市販されている芯にポリプロピレ
ン、鞘にポリエチレンを複合した繊維、芯にポリエステ
ル、鞘にポリエチレンを複合した繊維等がある。The heat-fused fibers used in the nonwoven fabric of the present invention are not particularly limited. For example, there are commercially available fibers in which the core is made of polypropylene, the sheath is made of polyethylene, and the core is made of polyester, and the sheath is made of polyethylene.
【0028】本発明の吸湿性不織布は多層構造となって
もよい。例えば表面を化粧するためにウレタンコーティ
ングをした不織布層を接着して、積層してもよい。The hygroscopic nonwoven fabric of the present invention may have a multilayer structure. For example, a nonwoven fabric layer coated with urethane may be bonded and laminated to make up the surface.
【0029】一般にウレタンコーティングは多孔が発生
するので、水を凝固溶媒とした湿式で製造されるため高
吸水繊維を含有する不織布に直接加工することはできな
い。しかし、ウレタンコーティング層と吸湿性不織布の
中間に他の不織布または編織物を積層するとよい。中間
層が無いと吸湿性不織布が吸水し、膨潤するためウレタ
ンコーティングが凸凹になりうまくいかない。ウレタン
コーティングを有機溶媒(例えばイソプロパトル)もし
くは有機溶媒を含む凝固液で行えば中間層がなくともよ
い。In general, since urethane coatings are porous, they are produced by a wet method using water as a coagulating solvent, and cannot be directly processed into a nonwoven fabric containing superabsorbent fibers. However, another nonwoven fabric or knitted fabric may be laminated between the urethane coating layer and the hygroscopic nonwoven fabric. If there is no intermediate layer, the moisture-absorbent nonwoven fabric absorbs water and swells, so that the urethane coating becomes uneven, which does not work. If the urethane coating is performed with an organic solvent (for example, isopropanol) or a coagulating liquid containing the organic solvent, the intermediate layer may not be provided.
【0030】本発明の不織布に用いるウレタンは特に限
定はしない。ジイソシアネートには、例えばトリレンジ
イソシアネート等を用いられる。ポリオール,ポリエス
テル,ポリカーボネートタイプ等あるが用途に応じ、ウ
レタンの特性に配慮すればよい。The urethane used for the nonwoven fabric of the present invention is not particularly limited. As the diisocyanate, for example, tolylene diisocyanate or the like is used. There are polyols, polyesters, polycarbonate types and the like, but depending on the application, the characteristics of urethane may be considered.
【0031】また、表面層のウレタンは多孔性で、気孔
が連通しているとよい。さらに、吸水性をよくするため
に従来よりよく用いられるが、滑り防止を兼ねて部分的
にウレタンに穴を開けてもよい。また、エンボス加工等
を実施してもよい。The urethane of the surface layer is preferably porous and has pores communicating therewith. Further, although it is used more often than ever to improve water absorption, a hole may be partially formed in urethane for the purpose of preventing slip. Further, embossing or the like may be performed.
【0032】本発明に用いる補強用のフィルム、又は不
織布は強度が充分にあれば特に限定しない。例えばポリ
エステルスパンボンド不織布等がある。多層に複合する
ために接着剤を用いるが、ゴムを用いる方が望ましい。The reinforcing film or nonwoven fabric used in the present invention is not particularly limited as long as it has sufficient strength. For example, there is a polyester spunbond nonwoven fabric. Although an adhesive is used for multi-layering, it is preferable to use rubber.
【0033】本発明の吸湿性不織布は繊維を予め着色す
ることにより自由に着色できる。また、含浸させるゴム
に着色してもよい。さらに、無機物に銀を担持させた抗
菌剤を繊維やゴムやウレタンに含有させて抗菌性を付与
してもよい。The hygroscopic nonwoven fabric of the present invention can be freely colored by pre-coloring the fibers. Further, the rubber to be impregnated may be colored. Further, an antibacterial agent having silver supported on an inorganic substance may be contained in fibers, rubber or urethane to impart antibacterial properties.
【0034】[0034]
【発明の効果】本発明の吸湿性不織布は優れた吸湿性、
表面構造、風合い、伸縮性をもち天然の皮革に代替し得
る安価な吸湿性不織布である。The hygroscopic nonwoven fabric of the present invention has excellent hygroscopicity,
It is an inexpensive hygroscopic nonwoven fabric that has a surface structure, texture and elasticity and can be replaced with natural leather.
【0035】[0035]
【実施例】さらに詳細は実施例にて説明する。実施例中
特に断わらない限り「%」は「重量%」とする。EXAMPLES Further details will be described in Examples. In Examples, “%” is “% by weight” unless otherwise specified.
【0036】高吸水性繊維の綿の生理食塩水吸水率は、
DIN 53814に準じて測定した。不織布の吸水率
は、2psi.の荷重をかけた後、重量を測定し、吸水
前の重量との差から算出した。高吸水性繊維の組成は、
蛍光X線分析によりアルカリ金属塩の含有量を測定し
た。また、モノマー組成は真空乾燥した試料をIRで測
定した。重合率はイヤトロスキャンMK5(TLC/F
ID)で測定した。高吸水性繊維の含有率は、他の繊維
を溶解し、洗浄後、乾燥重量より求めた。繊維強度等は
JIS L 1015に準じて測定した。高吸水繊維等
の吸湿率は、室温30℃、相対湿度80%の恒温室に1
昼夜放置した後の重量と絶乾重量から求めた。The physiological saline water absorption of cotton having high water absorbency is
It was measured according to DIN 53814. The water absorption of the nonwoven fabric is 2 psi. Was applied, and the weight was measured and calculated from the difference from the weight before water absorption. The composition of the super absorbent fiber is
The content of the alkali metal salt was measured by X-ray fluorescence analysis. The monomer composition was measured by IR for a sample dried in vacuum. The polymerization rate was measured by Iatroscan MK5 (TLC / F
ID). The content of the superabsorbent fiber was determined from the dry weight after dissolving other fibers and washing. Fiber strength and the like were measured according to JIS L1015. The moisture absorption rate of high water absorption fiber is 1
It was determined from the weight after standing overnight and the absolute dry weight.
【0037】製造例1 表1に示す重合組成でモノマー濃度15%、重合温度5
5℃、重合開始剤に過硫酸ナトリウムを用い、重合時間
4時間で水溶液重合を行った。重合率をTLCで測定し
た結果モノマーのピークはなかったので重合率は実用上
100%であった。従って得られたポリマーの重合組成
は重合仕込組成と一致した。次に得られたポリマードー
プを濃縮し、50℃で90ポイズ近くに粘度調整した。
一般に用いられる乾式紡糸と同様にして乾熱窒素気流中
に紡出、乾燥し、水分が20%残った糸を乾熱100℃
で1.5倍延伸した。ギアクリンパーでクリンプを付与
した後、120℃で5分間乾熱架橋処理を行い、カット
し、10デニール、51mmの高吸水性繊維を得た。Production Example 1 A monomer having a polymerization composition shown in Table 1 having a monomer concentration of 15% and a polymerization temperature of 5
Aqueous solution polymerization was carried out at 5 ° C. for 4 hours using sodium persulfate as a polymerization initiator. The polymerization rate was measured by TLC, and as a result, there was no peak of the monomer. Therefore, the polymerization rate was practically 100%. Therefore, the polymerization composition of the obtained polymer coincided with the polymerization charge composition. Next, the obtained polymer dope was concentrated, and the viscosity was adjusted at 50 ° C. to near 90 poise.
It is spun into a dry hot nitrogen stream and dried in the same manner as a commonly used dry spinning, and the yarn having a moisture content of 20% is dried at 100 ° C.
And stretched 1.5 times. After crimping with a gear crimper, a dry heat cross-linking treatment was performed at 120 ° C. for 5 minutes and cut to obtain a 10 denier, 51 mm high water-absorbing fiber.
【0038】得られた高吸水性繊維の吸湿率と吸水率を
表1に示した。得られた繊維の機械的強度は1gr/デ
ニール以上あり、通常のカードに仕掛けることができ
た。組成No.4は吸水率は高いが架橋が不足し、水に
部分的に溶解した。組成No.5は吸水率が不足した。Table 1 shows the moisture absorption and the water absorption of the resulting superabsorbent fibers. The resulting fiber had a mechanical strength of 1 gr / denier or more and could be mounted on a normal card. Composition No. Sample No. 4 had a high water absorption but lacked crosslinking and was partially dissolved in water. Composition No. 5 was insufficient in water absorption.
【0039】製造例2 製造例1で製造した組成No.2の高吸水性繊維と市販
の芯ポリエステル、鞘ポリエステルの130℃で融着す
る熱融着繊維3デニール51mm、市販のポリエステル
綿セミダル3デニール51mmを表2に示す割合で調合
し、一般に用いられるニードルパンチング法で不織布を
製造した。即ち、混綿後、カーディングし、ニードルパ
ンチングし、目付け200gr/m2 の不織布を製造し
た。得られた不織布の厚さは約0.9mmであった。こ
の不織布の調合割合を表2に示した。Production Example 2 Composition No. 1 produced in Production Example 1 2 super-absorbent fiber, commercially available core polyester, sheath polyester, heat-fused fiber 3 denier 51 mm, which is fused at 130 ° C., and commercially available polyester cotton semi-dal 3 denier 51 mm, are blended in the ratios shown in Table 2 and are generally used. A nonwoven fabric was manufactured by the needle punching method. That is, after blending, carding and needle punching were performed to produce a nonwoven fabric having a basis weight of 200 gr / m 2 . The thickness of the obtained nonwoven fabric was about 0.9 mm. Table 2 shows the mixing ratio of this nonwoven fabric.
【0040】実施例1 製造例2で製造した不織布に日本ゼオン(株)製NBR
樹脂エマルジョン(Nipol 1571)を固形分で
5%、浸漬法で含浸し、100℃で10分間熱風乾燥、
ベーキングをした。得られた不織布の吸水率、吸湿率を
表3に示した。樹脂加工による吸水性、吸湿性は未加工
品と殆ど変わらなかった。Example 1 NBR manufactured by Nippon Zeon Co., Ltd.
Resin emulsion (Nipol 1571) is impregnated with 5% of solid content by a dipping method, dried with hot air at 100 ° C. for 10 minutes,
I baked. Table 3 shows the water absorption and the moisture absorption of the obtained nonwoven fabric. Water absorption and hygroscopicity due to resin processing were almost the same as unprocessed products.
【0041】実施例2 製造例1で製造した組成No.2の高吸水性繊維30%
と市販のポリエステル綿セミダル3デニール51mm7
0%を調合し、ウレタン不織布「エスパンシオーネ」の
目付け80gr/m2 を芯地にし、一般に用いられるニ
ードルパンチング法で不織布を製造した。得られた不織
布の目付けは200gr/m2 であった。100℃でエ
ンボス加工した後のこの不織布の厚さは2mmであっ
た。この不織布の吸水率は800%であった。得られた
不織布の機械方向の引張伸度は50%以上であった。こ
れらの不織布に上記のNBR樹脂エマルジョンを固形分
で5%、浸漬法で含浸し、120℃で20分間熱風乾
燥、ベーキングをした。この不織布の吸水率は780%
であった。得られた不織布は、機械方向で50%以上の
伸度があり、伸縮弾性率は15%であった。Example 2 Composition No. 1 produced in Production Example 1 2 super absorbent fibers 30%
And commercially available polyester cotton semi-dal 3 denier 51mm7
0% was prepared, and a nonwoven fabric was manufactured by a commonly used needle punching method using a urethane nonwoven fabric “espansione” having a basis weight of 80 gr / m 2 as an interlining. The basis weight of the obtained nonwoven fabric was 200 gr / m 2 . The thickness of the nonwoven fabric after embossing at 100 ° C. was 2 mm. The water absorption of this nonwoven fabric was 800%. The tensile elongation in the machine direction of the obtained nonwoven fabric was 50% or more. These nonwoven fabrics were impregnated with the above-mentioned NBR resin emulsion at a solid content of 5% by an immersion method, dried at 120 ° C. for 20 minutes with hot air, and baked. The water absorption of this non-woven fabric is 780%
Met. The obtained nonwoven fabric had an elongation of 50% or more in the machine direction, and had a stretch elastic modulus of 15%.
【0042】実施例3 実施例1の調合No.4の樹脂加工した不織布にポリエ
ステルの芯鞘タイプ熱融着3d51mmの30gr/m
2 の不織布を中間層としてエンボスローラーで熱接着し
た。次にポリウレタン15%ジメチルホルムアミド溶液
をカレンダーローラーで1mmの厚さにコーティングし
た。この不織布をジメチルホルムアミド15%水85%
の25℃の凝固浴中で凝固させ、多孔質のウレタン層を
形成させた後、乾燥した。得た不織布のウレタン層は凹
凸も少なく、吸水性、吸湿性も未加工品と殆ど変わらな
かった。一方、中間層を接着せずにNo.4の不織布の
上にウレタンコーティングすると、ウレタンの面に凹凸
が目立ち、ウレタン層の付着状況も良くなかった。Example 3 Formulation No. of Example 1 30g / m of 3d51mm heat-sealed polyester core-sheath type to resin-processed non-woven fabric of 4
The nonwoven fabric of No. 2 was heat bonded with an emboss roller as an intermediate layer. Next, a 15% dimethylformamide solution of polyurethane was coated with a calender roller to a thickness of 1 mm. This non-woven fabric is dimethylformamide 15% water 85%
In a coagulation bath at 25 ° C. to form a porous urethane layer, and then dried. The urethane layer of the obtained nonwoven fabric had few irregularities, and its water absorption and moisture absorption were almost the same as those of the unprocessed product. On the other hand, No. When urethane coating was performed on the nonwoven fabric of No. 4, irregularities were conspicuous on the urethane surface, and the adhesion state of the urethane layer was not good.
【0043】[0043]
【表1】 [Table 1]
【0044】[0044]
【表2】 [Table 2]
【0045】[0045]
【表3】 [Table 3]
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−263615(JP,A) 特開 昭55−6590(JP,A) 特開 平5−33255(JP,A) (58)調査した分野(Int.Cl.7,DB名) D04H 1/00 - 18/00 EPAT(QUESTEL) WPI/L(QUESTEL)──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-263615 (JP, A) JP-A-55-6590 (JP, A) JP-A-5-33255 (JP, A) (58) Field (Int. Cl. 7 , DB name) D04H 1/00-18/00 EPAT (QUESTEL) WPI / L (QUESTEL)
Claims (4)
30重量%以上であり、生理食塩水を1200重量%以
上、3000重量%未満吸水するカルボン酸基を持つモ
ノマーと、カルボン酸基と反応して架橋結合を形成し得
るヒドロキシル基及び/又はアミノ基を持つモノマー
と、カルボン酸アルカリ金属塩基を持つモノマーを共重
合し、熱により架橋した高吸水性繊維を10〜50重量
%含有し、不織布を構成する繊維が相互にゴムにより接
着され、10%以上の伸縮弾性率を持つことを特徴とす
る吸湿性不織布。1. A 30 ° C., Ri der hygroscopicity 30% by weight or more at 80% relative humidity, 1200 wt% or saline
Above, a carboxylic acid group that absorbs less than 3000% by weight of water
React with carboxylic acid groups to form crosslinks
Having a hydroxyl group and / or an amino group
And a monomer having an alkali metal carboxylate
Moisture combined, a high absorption water soluble fibers crosslinked by heat contained 10 to 50 wt%, they are bonded by the rubber to each other fibers constituting the nonwoven fabric, which is characterized by having stretch elasticity modulus of more than 10% Nonwoven fabric.
30重量%以上であり、生理食塩水を1200重量%以
上、3000重量%未満吸水するカルボン酸基を持つモ
ノマーと、カルボン酸基と反応して架橋結合を形成し得
るヒドロキシル基及び/又はアミノ基を持つモノマー
と、カルボン酸アルカリ金属塩基を持つモノマーを共重
合し、熱により架橋した高吸水性繊維を10〜50重量
%含有し、芯地が20%以上の伸縮性を持つ不織布であ
り、10%以上の伸縮弾性率を持つことを特徴とする吸
湿性不織布。2. A 30 ° C., Ri der hygroscopicity 30% by weight or more at 80% relative humidity, 1200 wt% or saline
Above, a carboxylic acid group that absorbs less than 3000% by weight of water
React with carboxylic acid groups to form crosslinks
Having a hydroxyl group and / or an amino group
And a monomer having an alkali metal carboxylate
Combined, a high absorption water soluble fibers crosslinked by heat contained 10 to 50 wt%, interlining is a nonwoven fabric having 20% or more stretch, characterized by having stretch elasticity modulus of more than 10% Hygroscopic nonwoven fabric.
ーティング不織布と複合されていることを特徴とする請
求項1または2記載の吸湿性不織布3. The hygroscopic nonwoven fabric according to claim 1, wherein one side of the hygroscopic nonwoven fabric is composited with a porous urethane-coated nonwoven fabric.
の不織布と複合されていることを特徴とする請求項1ま
たは2記載の吸湿性不織布。4. The hygroscopic nonwoven fabric according to claim 1, wherein one side of the hygroscopic nonwoven fabric is composited with a film or another nonwoven fabric.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1804393A JP3154286B2 (en) | 1993-01-09 | 1993-01-09 | Hygroscopic nonwoven fabric |
EP94908115A EP0609464A4 (en) | 1992-08-19 | 1993-08-18 | Highly water-absorbent fiber. |
PCT/JP1993/001153 WO1994004725A1 (en) | 1992-08-19 | 1993-08-18 | Highly water-absorbent fiber |
US08/211,744 US5473023A (en) | 1992-08-19 | 1993-08-18 | Highly water-absorptive fiber |
CN93118261.1A CN1090895A (en) | 1992-08-19 | 1993-08-19 | high hygroscopicity fibre |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1804393A JP3154286B2 (en) | 1993-01-09 | 1993-01-09 | Hygroscopic nonwoven fabric |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06207364A JPH06207364A (en) | 1994-07-26 |
JP3154286B2 true JP3154286B2 (en) | 2001-04-09 |
Family
ID=11960665
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1804393A Expired - Fee Related JP3154286B2 (en) | 1992-08-19 | 1993-01-09 | Hygroscopic nonwoven fabric |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3154286B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5286204B2 (en) * | 2009-09-03 | 2013-09-11 | 富士紡ホールディングス株式会社 | Moisture absorption / release sheet and method |
-
1993
- 1993-01-09 JP JP1804393A patent/JP3154286B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH06207364A (en) | 1994-07-26 |
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