JPH04370276A - Moisture-permeable water-proof fabric and its production - Google Patents

Moisture-permeable water-proof fabric and its production

Info

Publication number
JPH04370276A
JPH04370276A JP3168640A JP16864091A JPH04370276A JP H04370276 A JPH04370276 A JP H04370276A JP 3168640 A JP3168640 A JP 3168640A JP 16864091 A JP16864091 A JP 16864091A JP H04370276 A JPH04370276 A JP H04370276A
Authority
JP
Japan
Prior art keywords
moisture
urethane
temperature
transition temperature
polymer film
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.)
Granted
Application number
JP3168640A
Other languages
Japanese (ja)
Other versions
JP3074335B2 (en
Inventor
Fumio Horii
堀井 二三男
Hisao Maruyama
丸山 尚夫
Shunichi Hayashi
俊一 林
Satoru Kondo
悟 近藤
Toshihiro Kato
加藤 利啓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BAIRON KK
MAEDA KASEI KK
Mitsubishi Heavy Industries Ltd
Unitika Ltd
Original Assignee
BAIRON KK
MAEDA KASEI KK
Mitsubishi Heavy Industries Ltd
Unitika Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BAIRON KK, MAEDA KASEI KK, Mitsubishi Heavy Industries Ltd, Unitika Ltd filed Critical BAIRON KK
Priority to JP03168640A priority Critical patent/JP3074335B2/en
Publication of JPH04370276A publication Critical patent/JPH04370276A/en
Application granted granted Critical
Publication of JP3074335B2 publication Critical patent/JP3074335B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

PURPOSE:To obtain the subject water-proof fabric having temperature-dependent moisture-permeability by forming a polyurethane polymer film having a specific physical property to one surface of textile fabric. CONSTITUTION:A urethane polymer having a glass transition temperature of 0-60 deg.C and a weight-average molecular weight of >=15,000 is dissolved in dimethylformamide. The solution is applied to at least one surface of textile fabric made of natural, regenerated or synthetic fiber, etc., and dried to form a urethane polymer film on the surface or a preparatorily prepared film of the urethane polymer is laminated to the surface of the textile fabric to form a film layer. The objective water-proof fabric having excellent moisture- permeability can be produced by the above processes. The polyurethane film having different glass-transition temperature and formed by this process enables the control of the dissipation of sweat from the body to the outer atmosphere by varying the moisture-permeability and, accordingly, the fabric is extremely suitable for clothes.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】本発明は、外気温度によって透湿
量(水蒸気透過量)の変化する透湿性防水布帛及びその
製造方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisture permeable waterproof fabric whose moisture permeability (water vapor permeation amount) changes depending on the outside temperature, and a method for manufacturing the same.

【0002】0002

【従来の技術】透湿性防水布帛は、水蒸気は透過させる
けれども水は透過させないものであり、スポーツ用衣料
やレインコートの生地として好適なものである。つまり
、外部からの雨水等は透過させないけれども、身体から
発生する汗は外部へ放出し、身体が雨水等で濡れるのを
防止すると共に身体の蒸れを防止できるからである。 従来より、このような透湿性防水布帛として、各種のタ
イプの布帛が使用されている。例えば、繊維布帛上に、
ウレタン系高分子フィルムを積層した透湿性防水布帛が
知られている。この透湿性防水布帛は、ウレタン系高分
子フィルムの存在によって水を透過させず、且つこのフ
ィルムを構成しているウレタン系高分子鎖間の間隙の存
在によって水蒸気を透過させるというものである。そし
て、この透湿性防水布帛は、外気温度が変化しても、そ
の透湿量は一定であった。
BACKGROUND OF THE INVENTION Moisture-permeable waterproof fabrics are permeable to water vapor but not water, and are suitable as fabrics for sports clothing and raincoats. In other words, although rainwater etc. from the outside are not permeated, sweat generated from the body is released to the outside, preventing the body from getting wet with rainwater etc. and preventing the body from getting stuffy. Conventionally, various types of fabrics have been used as such moisture-permeable waterproof fabrics. For example, on a fiber fabric,
BACKGROUND ART A moisture permeable waterproof fabric laminated with a urethane polymer film is known. This moisture-permeable waterproof fabric does not allow water to pass through due to the presence of the urethane-based polymer film, and allows water vapor to pass through due to the presence of gaps between the urethane-based polymer chains that make up the film. This moisture-permeable waterproof fabric had a constant amount of moisture permeation even when the outside temperature changed.

【0003】しかしながら、前記したような透湿量が一
定である透湿性防水布帛は、それを衣料用生地として使
用した場合、身体にとって次のような欠点が生じる。即
ち、外気温度が高いときは、身体からの発汗量が多くな
るのであるから、透湿量も多くならなければ、身体が蒸
れるという欠点を生じる。逆に、外気温度が低いときは
、身体からの発汗量が少なくなるのであるから、透湿量
も少なくならなければ、身体が冷えるという欠点を生じ
る。
[0003] However, when the above-mentioned moisture-permeable waterproof fabric, which has a constant amount of moisture permeation, is used as a clothing fabric, the following disadvantages arise for the body. That is, when the outside temperature is high, the amount of sweat from the body increases, so unless the amount of moisture permeable increases, the body will become stuffy. Conversely, when the outside temperature is low, the amount of perspiration from the body decreases, so unless the amount of moisture permeable decreases, the body will become cold.

【0004】0004

【発明が解決しようとする課題】そこで、本発明者等は
、外気温度の変化によって、透湿性防水布帛の透湿量を
変化させることについて、種々研究を行なった。その結
果、ウレタン系高分子フィルムには、次のような性質が
あることが判明した。即ち、ガラス転移温度を境として
透湿量が著しく変化することが判明したのである。本発
明は、ウレタン系高分子フィルムのこの性質を利用して
なされたものであり、透湿性防水布帛の材料として、あ
る一定のガラス転移温度を持つウレタン系高分子フィル
ムを使用することにより、外気温度が高くなれば透湿量
が多くなり、外気温度が低くなれば透湿量が少なくなる
ようにして、外気温度に拘らず、身体を快適な環境にお
こうとするものである。
[Problems to be Solved by the Invention] Therefore, the present inventors conducted various studies on changing the amount of moisture permeation of a moisture-permeable waterproof fabric depending on changes in outside air temperature. As a result, it was found that the urethane polymer film has the following properties. In other words, it has been found that the amount of moisture permeation changes significantly after the glass transition temperature. The present invention was made by taking advantage of this property of urethane-based polymer film, and by using urethane-based polymer film with a certain glass transition temperature as a material for a moisture-permeable waterproof fabric, it is possible to The higher the temperature, the more moisture permeates, and the lower the outside temperature, the less moisture permeates, thereby keeping the body in a comfortable environment regardless of the outside temperature.

【0005】[0005]

【課題を解決するための手段】即ち、本発明は、繊維布
帛の少なくとも片面にウレタン系高分子フィルムが積層
されてなり、該ウレタン系高分子フィルムのガラス転移
温度は0〜60℃の範囲内であり、且つ該ポリウレタン
系高分子の重量平均分子量は15000以上であること
を特徴とする透湿性防水布帛及びその製造方法に関する
ものである。
[Means for Solving the Problems] That is, in the present invention, a urethane polymer film is laminated on at least one side of a fiber fabric, and the glass transition temperature of the urethane polymer film is within the range of 0 to 60°C. The present invention relates to a moisture permeable waterproof fabric and a method for producing the same, characterized in that the polyurethane polymer has a weight average molecular weight of 15,000 or more.

【0006】本発明に係る透湿性防水布帛は、繊維布帛
の少なくとも片面にウレタン系高分子フィルムが積層さ
れてなるものである。本発明で使用するウレタン系高分
子フィルムの最大の特徴は、ガラス転移温度が0〜60
℃の範囲内にあることである。従来より使用されている
ウレタン系高分子フィルムは、そのガラス転移温度が−
20〜−60℃程度であり、この点で本発明で使用する
ウレタン系高分子フィルムと決定的に相違する。ここで
、ガラス転移温度を0〜60℃の範囲内とした理由は、
外気の温度が概ねこの範囲内で変化するからである。従
って、ウレタン系高分子フィルムのガラス転移温度は、
外気の一般的な温度範囲である10〜40℃であるのが
好ましい。
The moisture-permeable waterproof fabric according to the present invention is made of a fiber fabric with a urethane polymer film laminated on at least one side thereof. The greatest feature of the urethane polymer film used in the present invention is that the glass transition temperature is 0 to 60.
It must be within the range of ℃. The glass transition temperature of the urethane polymer film used conventionally is -
The temperature is about 20 to -60°C, and in this point it is decisively different from the urethane polymer film used in the present invention. Here, the reason why the glass transition temperature was set within the range of 0 to 60°C is as follows.
This is because the temperature of the outside air generally changes within this range. Therefore, the glass transition temperature of the urethane polymer film is
Preferably, the temperature range is 10 to 40°C, which is the general temperature range of outside air.

【0007】例えば、本発明で使用するウレタン系高分
子フィルムのガラス転移温度を20℃に設定したとする
と、外気の温度が20℃未満になると透湿量が少なくな
り、外気の温度が20℃以上になると透湿量が多くなる
。 このウレタン系高分子フィルムを使用した透湿性防水布
帛は、それを衣料用生地に用いた場合、外気の温度が2
0℃以上になると身体からの汗が外部へ放出され、逆に
外気の温度が20℃未満になると身体からの汗は外部へ
放出されにくくなる。従って、身体にとって非常に快適
である。これに対し、従来のウレタン系高分子フィルム
を使用した透湿性防水布帛は、そのガラス転移温度が−
20℃以下であるため、外気の温度(一般的に0℃以上
)がガラス転移温度以下になることはない。従って、透
湿性防水布帛の透湿量は一定であり、外気の温度に拘ら
ず、身体からの汗を外部へ放出する量も一定になる。従
って、身体が蒸れたり或いは身体にとって寒く感じると
いうことが生じるのである。なお、本発明において、ウ
レタン系高分子フィルムのガラス転移温度は、以下の方
法によって測定されるものである。即ち、DSC法(差
動走査計熱量計)により、昇温速度20℃/minで且
つ窒素ガス雰囲気で、測定されるものである。
For example, if the glass transition temperature of the urethane polymer film used in the present invention is set at 20°C, when the temperature of the outside air becomes less than 20°C, the amount of moisture permeable decreases, and the temperature of the outside air decreases to 20°C. If the temperature exceeds that amount, the amount of moisture permeable will increase. This moisture-permeable waterproof fabric using a urethane-based polymer film can be used for clothing when the temperature of the outside air is 2.
When the temperature of the outside air exceeds 0°C, sweat from the body is released to the outside, and conversely, when the temperature of the outside air falls below 20°C, it becomes difficult for sweat from the body to be released to the outside. Therefore, it is very comfortable for the body. In contrast, the glass transition temperature of conventional moisture-permeable waterproof fabrics using urethane-based polymer films is -
Since the temperature is 20° C. or lower, the temperature of the outside air (generally 0° C. or higher) does not fall below the glass transition temperature. Therefore, the amount of moisture permeable through the moisture-permeable waterproof fabric is constant, and the amount of sweat released from the body to the outside is also constant regardless of the temperature of the outside air. Therefore, the body may feel stuffy or cold. In the present invention, the glass transition temperature of the urethane polymer film is measured by the following method. That is, it is measured by the DSC method (differential scanning calorimeter) at a temperature increase rate of 20° C./min and in a nitrogen gas atmosphere.

【0008】また、本発明で使用するウレタン系高分子
の重量平均分子量は、15000以上である。ウレタン
系高分子の重量平均分子量が15000未満になると、
ウレタン系高分子フィルムの強度が低下し、破断しやす
くなったり或いは亀裂が生じたりする。従って、得られ
る透湿性防水布帛の防水性が低下し、好ましくない。な
お、ウレタン系高分子の重量平均分子量は、以下の方法
によって測定する。即ち、ウレタン系高分子のジメチル
ホルムアミド溶液を試料とし、キャリア溶剤にはジメチ
ルホルムアミドを用い、検出器には屈折計を使用して、
ゲルパーメーションクロマトグラフ法(GPC法)によ
り、測定されるものである。
[0008] Furthermore, the weight average molecular weight of the urethane polymer used in the present invention is 15,000 or more. When the weight average molecular weight of the urethane polymer is less than 15,000,
The strength of the urethane polymer film decreases, making it more likely to break or cracking. Therefore, the waterproofness of the resulting moisture-permeable waterproof fabric decreases, which is not preferable. Note that the weight average molecular weight of the urethane polymer is measured by the following method. That is, a dimethylformamide solution of a urethane polymer is used as a sample, dimethylformamide is used as a carrier solvent, and a refractometer is used as a detector.
It is measured by gel permeation chromatography (GPC method).

【0009】本発明で使用するウレタン系高分子は、例
えば以下の如き方法で製造することができる。即ち、O
CNR1NCOで表わされるジイソシアネートと、HO
R2OHで表わされるジオールとを共重合させてウレタ
ンプレポリマーを得、このウレタンプレポリマーをHO
R3OHで表わされる鎖成長剤と反応させて、ウレタン
系高分子を得ることができる。このようにして得られた
ウレタン系高分子は、一般的に、OCN(R1NHCO
OR2OCONH)mR1NHCOOR3OCONH(
R1NHCOOR2OCONH)nR1NCO[但し、
m及びnは正の整数を表わし、特に1〜16である。]
で表わされる。このウレタン系高分子のガラス転移温度
は、R1,R2,R3の剛直性,分子量,分子容,極性
等によって決まり、更にm及びnの数等によって決まる
。従って、本発明においては、ウレタン系高分子のガラ
ス転移温度が所望の値を取るように、これらを決定する
のである。一般的に、R2,R3の分子量が大きくなる
ほどガラス転移温度が降下し、またR1,R2,R3の
剛直性が増すほど上昇する。
The urethane polymer used in the present invention can be produced, for example, by the following method. That is, O
Diisocyanate represented by CNR1NCO and HO
A urethane prepolymer is obtained by copolymerizing with a diol represented by R2OH, and this urethane prepolymer is
A urethane-based polymer can be obtained by reacting with a chain growth agent represented by R3OH. The urethane polymer thus obtained is generally OCN (R1NHCO
OR2OCONH)mR1NHCOOR3OCONH(
R1NHCOOR2OCONH) nR1NCO [However,
m and n represent positive integers, especially from 1 to 16. ]
It is expressed as The glass transition temperature of this urethane-based polymer is determined by the rigidity, molecular weight, molecular volume, polarity, etc. of R1, R2, R3, and further determined by the numbers of m and n. Therefore, in the present invention, these are determined so that the glass transition temperature of the urethane polymer takes a desired value. Generally, the glass transition temperature decreases as the molecular weight of R2 and R3 increases, and increases as the rigidity of R1, R2 and R3 increases.

【0010】ジイソシアネートの具体例としては、2,
4−トルエンジイソシアネート、4,4’−ジフェニル
メタンジイソシアネート、カンボジイミド変性の4,4
’−ジフェニルメタンジイソシアネート、ヘキサメチレ
ンジイソシアネート等を使用することができる。また、
ジオールの具体例としては、ポリプロピレングリコール
、1,4−ブタングリコールアジペート、ポリテトラメ
チレングリコール、ビスフェノール−A+プロピレンオ
キサイド等を使用することができる。また、鎖延長剤の
具体例としては、エチレングリコール、1,4−ブタン
グリコール、ビス(2−ハイドロキシエチル)ハイドロ
キノン、ビスフェノール−A+エチレンオキサイド、ビ
スフェノール−A+プロピレンオキサイド等を使用する
ことができる。
Specific examples of diisocyanates include 2,
4-Toluene diisocyanate, 4,4'-diphenylmethane diisocyanate, cambodiimide-modified 4,4
'-diphenylmethane diisocyanate, hexamethylene diisocyanate, etc. can be used. Also,
Specific examples of the diol include polypropylene glycol, 1,4-butane glycol adipate, polytetramethylene glycol, bisphenol-A+propylene oxide, and the like. Further, as specific examples of the chain extender, ethylene glycol, 1,4-butane glycol, bis(2-hydroxyethyl)hydroquinone, bisphenol-A+ethylene oxide, bisphenol-A+propylene oxide, etc. can be used.

【0011】ポリウレタン系高分子フィルムが積層され
る繊維布帛としては、木綿,麻等の天然セルロース繊維
、羊毛,絹等の天然タンパク質繊維、レーヨン,アセテ
ート等の再生セルロース繊維、ポリエステル,ポリアミ
ド,ポリアクリロニトリル等の合成繊維等の繊維、又は
これらの繊維の二種以上の混用よりなる織物,編物,不
織布等が用いられる。
The fiber fabric on which the polyurethane polymer film is laminated includes natural cellulose fibers such as cotton and hemp, natural protein fibers such as wool and silk, regenerated cellulose fibers such as rayon and acetate, polyester, polyamide, and polyacrylonitrile. Fibers such as synthetic fibers, etc., or woven fabrics, knitted fabrics, non-woven fabrics, etc. made of a mixture of two or more of these fibers are used.

【0012】本発明に係る透湿性防水布帛の製造方法と
しては、以下に示す二つの方法が好ましい。第一には、
繊維布帛の少なくとも片面に、ウレタン系高分子溶液を
均一に塗布して塗布層を形成した後、該塗布層を乾燥し
てウレタン系高分子フィルムを生成させる方法である。 ウレタン系高分子溶液としては、ウレタン系高分子を溶
剤に溶解させた溶剤溶液、又はウレタン系高分子を水溶
液中に懸濁させた水系エマルジョンを使用することがで
きる。溶剤溶液を調整する場合には、ジメチルホルムア
ルデヒド,ジメチルアセトアミド,ジメチルスルホキシ
ド,メチルエチルケトン,2−ブタノン等の有機溶剤を
溶媒として、粘度2000〜50000cpsとするの
が、好ましい。 粘度が2000cps未満であると、繊維布帛表面に塗
布しても、フィルムを形成しにくくなり、防水性を付与
しにくくなる傾向が生じる。また、粘度が50000c
psを超えると、溶剤溶液の流動性が低下し、厚さの均
一なフィルムを形成しにくくなる傾向が生じる。ウレタ
ン系高分子溶液を繊維布帛表面に塗布するには、ナイフ
コーターやバーコーター等の従来公知のコーティング設
備を利用すればよい。また、ウレタン系高分子溶液とし
て水系エマルジョンを使用する場合には、前記のコーテ
ィング設備の他に、グラビア捺染機,ロータリー捺染機
を利用することもできる。また、繊維布帛表面にウレタ
ン系高分子溶液を塗布する前に、予め繊維布帛表面をポ
リフッ化ビニル樹脂等で加工しておくのが、好ましい。 これは、繊維布帛表面へのウレタン系高分子溶液の塗布
を均一にでき、したがって生成するフィルムが均一にな
りやすく、更に得られる透湿性防水布帛の風合がソフト
になりやすいからである。また、同様の理由で、予め繊
維布帛をカレンダー処理して、その表面を平坦にしてお
くことも、好ましい。
[0012] The following two methods are preferred as methods for producing the moisture-permeable waterproof fabric according to the present invention. Firstly,
This is a method in which a urethane polymer solution is uniformly applied to at least one side of a fiber fabric to form a coating layer, and then the coating layer is dried to produce a urethane polymer film. As the urethane-based polymer solution, a solvent solution in which a urethane-based polymer is dissolved in a solvent, or an aqueous emulsion in which a urethane-based polymer is suspended in an aqueous solution can be used. When preparing a solvent solution, it is preferable to use an organic solvent such as dimethyl formaldehyde, dimethyl acetamide, dimethyl sulfoxide, methyl ethyl ketone, 2-butanone, etc. as a solvent and adjust the viscosity to 2,000 to 50,000 cps. If the viscosity is less than 2000 cps, it will be difficult to form a film even when applied to the surface of a fiber fabric, and it will tend to be difficult to provide waterproof properties. Also, the viscosity is 50000c
If it exceeds ps, the fluidity of the solvent solution decreases, and it tends to become difficult to form a film with a uniform thickness. In order to apply the urethane-based polymer solution to the surface of the fiber fabric, conventionally known coating equipment such as a knife coater or a bar coater may be used. Furthermore, when a water-based emulsion is used as the urethane-based polymer solution, a gravure printing machine or a rotary printing machine can also be used in addition to the above-mentioned coating equipment. Further, it is preferable that the surface of the fiber cloth is previously treated with a polyvinyl fluoride resin or the like before applying the urethane polymer solution to the surface of the fiber cloth. This is because the urethane-based polymer solution can be uniformly applied to the surface of the fiber fabric, so the resulting film tends to be uniform, and the resulting moisture-permeable waterproof fabric tends to have a soft feel. For the same reason, it is also preferable to previously calender the fiber fabric to flatten its surface.

【0013】第二の方法としては、予めウレタン系高分
子フィルムと繊維布帛とを準備しておき、両者を貼合す
る方法である。ウレタン系高分子フィルムを製造する方
法としては、ウレタン系高分子を融点以上で熱溶融して
巾広のスリットから押し出し成形する方法や、ウレタン
系高分子溶液を離型紙上に均一に塗布し乾燥する方法等
が挙げられる。ウレタン系高分子フィルムと繊維布帛と
を貼合する方法としては、繊維布帛表面又はウレタン系
高分子フィルム表面に、ポリウレタン系接着剤やポリア
クリル系接着剤等の接着剤を施しておき、この接着剤に
よって両者を貼合すればよい。また、熱溶融したウレタ
ン系高分子を押し出し成形してフィルムを形成しながら
、未だフィルムが軟化状態のときに繊維布帛と積層し、
フィルムの粘着力で両者を貼合してもよい(いわゆる押
し出しラミネート法)。
The second method is to prepare a urethane polymer film and a fiber fabric in advance and bond them together. Methods for producing urethane-based polymer films include methods of melting urethane-based polymers above their melting point and extruding them through a wide slit, or applying a urethane-based polymer solution uniformly onto release paper and drying it. Examples include a method to do so. A method for laminating a urethane polymer film and a fiber fabric is to apply an adhesive such as a polyurethane adhesive or a polyacrylic adhesive to the surface of the fiber fabric or the urethane polymer film, and then apply this adhesive. The two may be bonded together using an agent. In addition, while forming a film by extrusion molding a hot molten urethane polymer, while the film is still in a softened state, it is laminated with a fiber fabric,
The two may be bonded together using the adhesive strength of the film (so-called extrusion lamination method).

【0014】以上のようにして得られる本発明に係る透
湿性防水布帛は、一般的に、ガラス転移温度を境にして
透湿量が3〜5倍程度変化するものである。即ち、ウレ
タン系高分子フィルムのガラス転移温度以上における透
湿量は、ウレタン系高分子フィルムのガラス転移温度未
満における透湿量の約3〜5倍程度になるのである。そ
して、本発明に係る透湿性防水布帛は、ウレタン系高分
子フィルムのガラス転移温度が室温程度に設定されてい
るので、外気の温度変化によって透湿量が変化するので
ある。また、本発明に係る透湿性防水布帛は、ウレタン
系高分子フィルムよりなる層が存在するため、一般的に
、耐水圧が1000mmHg程度以上であり、防水性に
優れたものである。従って、本発明に係る透湿性防水布
帛は、ウポーツウェアーの他に、レインコート,手術着
,作業服等に好適に使用しうるものである。
[0014] The moisture permeable waterproof fabric according to the present invention obtained as described above generally has a moisture permeability that changes by about 3 to 5 times after reaching the glass transition temperature. That is, the amount of moisture permeable at temperatures above the glass transition temperature of the urethane-based polymer film is approximately 3 to 5 times the amount of moisture permeable at temperatures below the glass transition temperature of the urethane-based polymer film. In the moisture-permeable waterproof fabric according to the present invention, the glass transition temperature of the urethane-based polymer film is set to about room temperature, so the amount of moisture permeation changes with changes in the temperature of the outside air. Further, since the moisture-permeable waterproof fabric according to the present invention includes a layer made of a urethane-based polymer film, it generally has a water pressure resistance of about 1000 mmHg or more, and has excellent waterproof properties. Therefore, the moisture-permeable waterproof fabric according to the present invention can be suitably used for raincoats, surgical gowns, work clothes, etc. in addition to sportswear.

【0015】[0015]

【実施例】次に、本発明を実施例によって、さらに具体
的に説明する。なお、実施例中における布帛の性能評価
は、下記の方法で行なった。 (1)透湿性 JIS L−1099(A−1法)により、所定の温度
で透湿量を測定した。単位は、水蒸気圧差を1atmと
した時の透湿量とした。 (2)耐水性 JIS L−1092(イ)静水圧法により、耐水度を
測定した。
EXAMPLES Next, the present invention will be explained in more detail by way of examples. In addition, performance evaluation of the fabric in Examples was performed by the following method. (1) Moisture permeability The amount of moisture permeable was measured at a predetermined temperature according to JIS L-1099 (Method A-1). The unit was the amount of moisture permeation when the water vapor pressure difference was 1 atm. (2) Water resistance The water resistance was measured according to JIS L-1092 (a) hydrostatic pressure method.

【0016】実施例1 まず、ウレタン系高分子が溶解されているジメチルホル
ムアミド溶液(三菱重工業株式会社製形状記憶ポリマー
、商品名「ダイアリティ」溶液タイプMS2500)を
準備した。このウレタン系高分子は、ジメチルホルムア
ミド中で重合されたものであり、その濃度は30重量%
であり、25℃における粘度は95000cpsであっ
た。また、ウレタン系高分子のガラス転移温度は25℃
であり、その重量平均分子量は、25000であった。 このジメチルホルムアミド溶液を、同量の1,1,1−
トリクロロエタンで希釈して、粘度9000cpsのウ
レタン系高分子溶液を得た。
Example 1 First, a dimethylformamide solution (shape memory polymer manufactured by Mitsubishi Heavy Industries, Ltd., trade name "Diality" solution type MS2500) in which a urethane polymer was dissolved was prepared. This urethane-based polymer was polymerized in dimethylformamide, and its concentration was 30% by weight.
The viscosity at 25° C. was 95,000 cps. In addition, the glass transition temperature of urethane polymer is 25℃
and its weight average molecular weight was 25,000. This dimethylformamide solution was added to the same amount of 1,1,1-
It was diluted with trichloroethane to obtain a urethane-based polymer solution with a viscosity of 9000 cps.

【0017】次に、フッ素系撥水剤(アサヒガードAG
−433、濃度3%)で撥水加工したナイロンタフタ(
75d/48f/3、120×85)に、ナイフコータ
ーでウレタン系高分子溶液を厚さ0.1mmとなるよう
にコーティングし、乾燥した。以上のようにして得られ
た透湿性防水布帛は、ナイロンタフタにウレタン系高分
子フィルムが積層されてなるものであり、ウレタン系高
分子フィルムのガラス転移温度は25℃であった。また
、この透湿性防水布帛の各温度における透湿量及び耐水
度を表1に示した。
Next, fluorine-based water repellent (Asahi Guard AG
-433, concentration 3%) nylon taffeta (concentration 3%)
75d/48f/3, 120×85) was coated with a urethane polymer solution to a thickness of 0.1 mm using a knife coater and dried. The moisture permeable waterproof fabric obtained as described above was made by laminating a urethane polymer film on nylon taffeta, and the glass transition temperature of the urethane polymer film was 25°C. Further, Table 1 shows the moisture permeability and water resistance of this moisture permeable waterproof fabric at each temperature.

【表1】[Table 1]

【0018】比較例1 ガラス転移温度−40℃で、重量平均分子量30000
のウレタン系高分子を使用する以外は、実施例1と同様
の方法で透湿性防水布帛を得た。この透湿性防水布帛中
のウレタン系高分子フィルムのガラス転移温度は、−4
0℃であった。この透湿性防水布帛の各温度における透
湿量及び耐水度を表1に示した。
Comparative Example 1 Glass transition temperature -40°C, weight average molecular weight 30,000
A moisture-permeable waterproof fabric was obtained in the same manner as in Example 1, except that the urethane-based polymer was used. The glass transition temperature of the urethane polymer film in this moisture-permeable waterproof fabric is -4
It was 0°C. Table 1 shows the moisture permeability and water resistance of this moisture permeable waterproof fabric at each temperature.

【0019】実施例2 ウレタン系高分子が溶解されているジメチルホルムアミ
ド溶液(三菱重工業株式会社製形状記憶ポリマー、商品
名「ダイアリティ」溶液タイプMS2000)を準備し
た。このウレタン系高分子は、ジメチルホルムアミド中
で重合されたものであり、その濃度は45重量%であり
、25℃における粘度は95000cpsであった。ま
た、ウレタン系高分子のガラス転移温度は20℃であり
、その重量平均分子量は、25000であった。このウ
レタン系高分子溶液を、シリコーンフィルムをコートし
た離型紙上に塗布し、乾燥して厚さ15μmのウレタン
系高分子フィルムを形成した。このウレタン系高分子フ
ィルムを、木綿100%のスムース生地(40番手、3
0inch、24G)にウレタン系接着剤を介して積層
し、両者を貼合した。このようにして得られた透湿性防
水布帛中のウレタン系高分子フィルムのガラス転移温度
は、20℃であった。そして、この透湿性防水布帛の各
温度における透湿量及び耐水度を表2に示した。
Example 2 A dimethylformamide solution (shape memory polymer manufactured by Mitsubishi Heavy Industries, Ltd., trade name "Diality" solution type MS2000) in which a urethane polymer was dissolved was prepared. This urethane-based polymer was polymerized in dimethylformamide, had a concentration of 45% by weight, and a viscosity of 95,000 cps at 25°C. Further, the glass transition temperature of the urethane polymer was 20°C, and the weight average molecular weight was 25,000. This urethane-based polymer solution was applied onto a release paper coated with a silicone film and dried to form a urethane-based polymer film with a thickness of 15 μm. This urethane polymer film is coated with 100% cotton smooth fabric (40 count, 3
0 inch, 24G) via a urethane adhesive, and the two were bonded together. The glass transition temperature of the urethane-based polymer film in the moisture-permeable waterproof fabric thus obtained was 20°C. The moisture permeability and water resistance of this moisture permeable waterproof fabric at each temperature are shown in Table 2.

【表2】[Table 2]

【0020】比較例2 ガラス転移温度−40℃で、重量平均分子量30000
のウレタン系高分子を使用する以外は、実施例2と同様
の方法で透湿性防水布帛を得た。この透湿性防水布帛中
のウレタン系高分子フィルムのガラス転移温度は、−4
0℃であった。この透湿性防水布帛の各温度における透
湿量及び耐水度を表2に示した。
Comparative Example 2 Glass transition temperature -40°C, weight average molecular weight 30,000
A moisture-permeable waterproof fabric was obtained in the same manner as in Example 2, except that the urethane-based polymer was used. The glass transition temperature of the urethane polymer film in this moisture-permeable waterproof fabric is -4
It was 0°C. Table 2 shows the moisture permeability and water resistance of this moisture permeable waterproof fabric at each temperature.

【0021】実施例3 イソシアネート成分として4,4−ジフェニルメタンジ
イソシアネート(三菱化成株式会社製、商品名「ダウイ
ソシアネート125M」)を、ポリオール成分としてポ
リプロピレングリコール(三洋化成工業株式会社製、商
品名「PP−1000」)を、鎖延長剤として1,4−
ブタンジオール(三菱化成株式会社製)を使用して、ガ
ラス転移温度25℃、重量平均分子量25000のウレ
タン系高分子を得た。このウレタン系高分子を溶融状態
とし、スリット巾0.2mmのスリットダイより押し出
しながら、ポリエステルトリコット上に積層して、両者
を貼合した。以上のようにして得られた透湿性防水布帛
は、ウレタン系高分子フィルムの厚さが7μmであり、
ガラス転移温度は25℃であった。そして、この透湿性
防水布帛の各温度における透湿量及び耐水度を表3に示
した。
Example 3 4,4-diphenylmethane diisocyanate (manufactured by Mitsubishi Kasei Corporation, trade name "Dow Isocyanate 125M") was used as the isocyanate component, and polypropylene glycol (manufactured by Sanyo Chemical Industries, Ltd., trade name "PP-") was used as the polyol component. 1,4-
Using butanediol (manufactured by Mitsubishi Kasei Corporation), a urethane polymer having a glass transition temperature of 25° C. and a weight average molecular weight of 25,000 was obtained. This urethane-based polymer was melted and extruded through a slit die with a slit width of 0.2 mm, and laminated on polyester tricot to bond the two together. The moisture-permeable waterproof fabric obtained as described above has a urethane polymer film having a thickness of 7 μm,
The glass transition temperature was 25°C. The moisture permeability and water resistance of this moisture permeable waterproof fabric at each temperature are shown in Table 3.

【表3】[Table 3]

【0022】比較例3 ガラス転移温度−25℃のポリエチレンを使用する以外
は、実施例3と同様の方法で透湿性防水布帛を得た。こ
の透湿性防水布帛中のポリエチレンフィルムのガラス転
移温度は、−25℃であった。この透湿性防水布帛の各
温度における透湿量及び耐水度を表3に示した。
Comparative Example 3 A moisture-permeable waterproof fabric was obtained in the same manner as in Example 3, except that polyethylene having a glass transition temperature of -25°C was used. The glass transition temperature of the polyethylene film in this moisture-permeable waterproof fabric was -25°C. Table 3 shows the moisture permeability and water resistance of this moisture permeable waterproof fabric at each temperature.

【0023】以上の実施例からも明かなとおり、実施例
に係る透湿性防水布帛は、ガラス転移温度が室温程度の
ウレタン系高分子フィルムを備えているので、室温がガ
ラス転移温度未満になると透湿量が低下し、室温がガラ
ス転移温度以上になると透湿量が増大する。従って、外
気温度が上がると、透湿性防水布帛の透湿量が増大し、
身体から発生する汗を良好に外部に放出し、逆に外気温
度が下がると、透湿量が低下し身体からの汗を外部に放
出しにくくなる。依って、実施例に係る透湿性防水布帛
を衣料用の生地として使用すれば、外気温度の高低によ
らず、身体を快適な環境におくことができる。これに対
し、比較例に係る透湿性防水布帛は、外気温度の高低に
拘らず、透湿量がほぼ一定であるため、外気温度の高低
によって、身体が蒸れたり或いは冷えたりすることにな
る。
As is clear from the above examples, the moisture-permeable waterproof fabric according to the example includes a urethane-based polymer film whose glass transition temperature is around room temperature, so it becomes transparent when the room temperature falls below the glass transition temperature. When the amount of moisture decreases and the room temperature becomes higher than the glass transition temperature, the amount of moisture permeable increases. Therefore, when the outside temperature rises, the amount of moisture permeable through the moisture-permeable waterproof fabric increases,
Sweat generated from the body is effectively released to the outside, and conversely, when the outside temperature drops, the amount of moisture permeable decreases, making it difficult to release sweat from the body to the outside. Therefore, if the moisture-permeable waterproof fabric according to the embodiment is used as a fabric for clothing, the body can be kept in a comfortable environment regardless of the outside temperature. On the other hand, the moisture permeable waterproof fabric according to the comparative example has a substantially constant amount of moisture permeation regardless of the outside air temperature, so the body becomes stuffy or cold depending on the outside air temperature.

【0024】[0024]

【作用】本発明に係る透湿性防水布帛を構成するウレタ
ン系高分子フィルムは、前記したようにガラス転移温度
を室温程度に設定したものである。そして、ガラス転移
温度を境として、その透湿量が著しく変化する。この透
湿量が変化する理由は、定かではないが、以下のように
考えられる。即ち、一般に高分子のガラス転移温度は、
高分子鎖中の一定長のセグメントの液体状運動の始点に
相当する。従って、ガラス転移温度以上では高分子鎖の
自由体積が、急激に増大する。自由体積が増大するとい
うことは、高分子鎖間における間隙が増大するというこ
とである。依って、この間隙を水分子が透過しやすくな
り、透湿量が増大するものと考えられるのである。
[Function] The urethane polymer film constituting the moisture-permeable waterproof fabric according to the present invention has a glass transition temperature set to about room temperature, as described above. The amount of moisture permeable changes significantly after reaching the glass transition temperature. Although the reason for this change in the amount of moisture permeation is not clear, it is thought to be as follows. That is, in general, the glass transition temperature of a polymer is
It corresponds to the starting point of liquid-like motion of a segment of a certain length in a polymer chain. Therefore, the free volume of polymer chains increases rapidly above the glass transition temperature. An increase in free volume means an increase in the gaps between polymer chains. Therefore, it is thought that water molecules can easily permeate through these gaps, increasing the amount of moisture permeation.

【0025】[0025]

【発明の効果】以上述べたように、本発明に係る透湿性
防水布帛は、ガラス転移温度が室温付近に設定されたウ
レタン系高分子フィルムを備えているため、ガラス転移
温度未満では透湿量が少なく、ガラス転移温度以上では
透湿量が著しく増大する。従って、本発明に係る透湿性
防水布帛を使用して衣料を作成すれば、外気温度が高く
なって身体からの発汗が多くなると、その汗を良好に外
部に放出し、逆に外気温度が低くなって身体からの発汗
が少なくなると、汗や体温等を外部に放出しにくくなる
。依って、外気温度の高いときには身体が涼しく感じら
れ、外気温度が低いときには身体が暖かく感じられ、常
に身体にとって快適な環境を提供するという効果を奏す
るものである。また、本発明に係る透湿性防水布帛は、
ウレタン系高分子フィルムの層を備えているので、これ
を使用して衣料を作成すれば、防水性に優れた衣料を得
ることができるという効果も奏する。
Effects of the Invention As described above, since the moisture permeable waterproof fabric according to the present invention is equipped with a urethane polymer film whose glass transition temperature is set around room temperature, the moisture permeability decreases below the glass transition temperature. The amount of moisture permeable increases significantly above the glass transition temperature. Therefore, if clothing is made using the moisture permeable waterproof fabric according to the present invention, when the outside temperature increases and the body sweats a lot, the sweat will be effectively released to the outside, and conversely, when the outside temperature is low, the sweat will be released to the outside. As a result, less sweat is produced from the body, making it difficult for sweat and body heat to be released to the outside. Therefore, when the outside temperature is high, the body feels cool, and when the outside temperature is low, the body feels warm, thereby providing an effect of always providing a comfortable environment for the body. Further, the moisture permeable waterproof fabric according to the present invention is
Since it has a layer of urethane-based polymer film, it also has the effect that if clothing is made using this, clothing with excellent waterproofness can be obtained.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】  繊維布帛の少なくとも片面にウレタン
系高分子フィルムが積層されてなり、該ウレタン系高分
子フィルムのガラス転移温度は0〜60℃の範囲内であ
り、且つ該ポリウレタン系高分子の重量平均分子量は1
5000以上であることを特徴とする透湿性防水布帛。
Claim 1: A urethane polymer film is laminated on at least one side of a fiber fabric, the glass transition temperature of the urethane polymer film is within the range of 0 to 60°C, and Weight average molecular weight is 1
A moisture-permeable waterproof fabric characterized by having a molecular weight of 5,000 or more.
【請求項2】  繊維布帛の少なくとも片面に、ウレタ
ン系高分子溶液を均一に塗布して塗布層を形成した後、
該塗布層を乾燥してウレタン系高分子フィルムを生成さ
せることを特徴とする請求項1記載の透湿性防水布帛の
製造方法。
2. After uniformly applying a urethane polymer solution to at least one side of the fiber fabric to form a coating layer,
2. The method for producing a moisture-permeable waterproof fabric according to claim 1, wherein the coating layer is dried to produce a urethane-based polymer film.
【請求項3】  ウレタン系高分子フィルムを、繊維布
帛の少なくとも片面に貼合することを特徴とする請求項
1記載の透湿性防水布帛の製造方法。
3. The method for producing a moisture-permeable waterproof fabric according to claim 1, characterized in that a urethane-based polymer film is laminated on at least one side of the fiber fabric.
JP03168640A 1991-06-12 1991-06-12 Moisture-permeable waterproof fabric and method for producing the same Expired - Fee Related JP3074335B2 (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Publication Number Publication Date
JPH04370276A true JPH04370276A (en) 1992-12-22
JP3074335B2 JP3074335B2 (en) 2000-08-07

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JP2582742B2 (en) * 1992-03-17 1997-02-19 鐘紡株式会社 Fabric whose moisture permeability is controlled by temperature
WO1994000631A1 (en) * 1992-06-19 1994-01-06 Komatsu Seiren Co., Ltd. Moisture-permeable waterproof cloth and production thereof
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