JP2003227043A

JP2003227043A - Spun yarn

Info

Publication number: JP2003227043A
Application number: JP2002024590A
Authority: JP
Inventors: Sumi Nakamura; 寿美中村; Toshiyuki Kondo; 敏之近藤
Original assignee: Asahi Kasei Corp
Current assignee: Asahi Kasei Corp
Priority date: 2002-01-31
Filing date: 2002-01-31
Publication date: 2003-08-15

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spun yarn suitable for clothing maintaining body temperature for a long time and resistant to heat release from the body, thus having high thermal insulation. <P>SOLUTION: This spun yarn includes ≥40 mass% of hydrophobic synthetic fibers 0.1-3 dtex in single filament fineness and ≥30 mass% of hygroscopic and exothermic fibers ≥15 J/g in heat generation upon moisture absorption when the ambience is altered from 20°C and 40%RH to 20°C and 90%RH. <P>COPYRIGHT: (C)2003,JPO

Description

【発明の詳細な説明】【０００１】【発明の属する技術分野】本発明は、保温性に優れた紡
績糸、特に、極細繊維と吸湿発熱性繊維とを併用するこ
とにより、体温を守るのに適した衣料用等の布帛、例え
ば、編織物に用いられる紡績糸に関する。【０００２】【従来の技術】従来、冬の寒い時期の保温肌着として、
ナイロン繊維をスパンデックス弾性繊維にカバリングし
たカバリング糸と綿とを交編した肌着や、中空ポリエス
テル繊維及びアクリル繊維等の合成繊維からなる肌着、
ウールの肌着等が用いられている。更に、より積極的に
人体を暖めることを意図して、アクリル酸系の吸湿発熱
繊維を用いた衣料（特許第２０２８４６７号明細書）、
セルロースに水溶性ビニル重合化合物を導入した吸湿発
熱性セルロース繊維を用いた衣料（特許第２８９８６２
３号明細書）等が知られている。しかしながら、これら
アクリル酸系吸湿発熱繊維及び吸湿発熱性セルロース繊
維は吸湿発熱性を有するものの、これらの繊維を用いた
衣料は、一時的には保温能力を発揮するが、着用時間の
経過による皮膚温の低下が大きく、持続的な、人体から
の熱の逃散阻止能力に欠けていた。【０００３】【発明が解決しようとする課題】本発明は、体温を長時
間にわたって維持し、体から熱を逃がし難い、総合保温
性に優れた衣料用等に適した紡績糸を提供することを目
的とする。【０００４】【課題を解決するための手段】本発明者らは、前記課題
を解決するために検討を重ねた結果、本発明を完成する
に至った。すなわち、本発明は、単糸繊度が０．１〜
１．３ｄｔｅｘの疎水性合成繊維を４０質量％以上と、
環境を２０℃、４０％ＲＨから２０℃、９０％ＲＨに変
化させた時の吸湿発熱量が１５Ｊ／ｇ以上である吸湿発
熱性繊維を３０質量％以上含む紡績糸である。【０００５】以下、本発明について説明する。本発明の
紡績糸は、吸湿発熱性のみならず、人体からの熱の逃散
阻止能力に優れた衣料用素材である。従来、保温性衣料
用として知られている繊維は、吸湿発熱性の向上又は保
温性の向上のいずれか一方のみを目的としたものであ
り、このような繊維を用いた衣料は、依然として吸湿発
熱性能に乏しいか、吸湿発熱性能が改善されてはいて
も、衣料として用いた場合、人体からの熱の逃散阻止能
力に乏しいため、持続的な人体からの熱の逃散阻止能力
に欠けていた。【０００６】本発明は、衣料に、人体からの熱の逃散阻
止性能を付与することに着目したものであって、吸湿発
熱性と人体からの熱の逃散阻止能力（以下、この二つを
合わせて、総合保温性、という）が共に優れた衣料等の
素材として好適な紡績糸である。総合保温性は、人が着
用時に感じる総合的な暖かさ及び体温維持力を示す指標
であり、後述するように、繊維の環境が２２℃５２％Ｒ
Ｈから２２℃９０％ＲＨに変化した場合の体温の維持能
力を測定して得られる。５２％ＲＨは、２月の東京の平
均湿度（１９６１〜１９９０年）であり、９０％ＲＨは
人が運動により汗ばんだ状況を想定している。総合保温
性は、着衣の下で皮膚温度を想定した３２℃の熱板の温
度を維持するために必要なエネルギー量で表される。【０００７】本発明のこのような効果は、単糸繊度が
０．１〜１．３ｄｔｅｘの疎水性合成繊維と、環境を２
０℃、４０％ＲＨから２０℃、９０％ＲＨに変化させた
時の吸湿発熱量が１５Ｊ／ｇ以上である吸湿発熱性繊維
とを含む紡績糸によって達成される。本発明の疎水性合
成繊維は、単糸繊度が０．１〜１．３ｄｔｅｘであり、
好ましくは０．５〜１．１ｄｔｅｘである。単糸繊度が
この範囲であると、繊維内空隙の径が小さくなるため、
通気抵抗が高くなり、デッドエアーが多くなって、熱の
逃散阻止能力が向上すると共に、吸湿発熱性繊維の吸湿
発熱量を長期間持続させることができる。単糸繊度が
１．３ｄｔｅｘを越えると、繊維間内空隙の径が大きく
なり総合保温性が低下する。また肌触りがチクチクして
着用中に不快感を与える。単糸繊度が０．１ｄｔｅｘ未
満であると、単繊維の曲げ剛性が低いために、着用中に
着圧が付加されることにより実質的な繊維内空隙量が減
少するため、総合保温性が低下する。【０００８】総合保温性を更に高めるうえから、疎水性
繊維の５０質量％以上が嵩高加工された繊維であること
が好ましい。疎水性合成繊維が、下記（イ）及び／又は
（ロ）の条件を満たす場合、着用と洗濯を繰り返して
も、高い柔軟性及び優れた表面形態安定性を維持し、ピ
リングができにくく、キシミ感の発生も抑えられるため
に好ましい。（イ）紡績糸を沸水処理した後の、単繊維の繊維軸方向
における０．５ｍｍ間の微小捲縮数が１以下である繊維
本数の比率が７０％以上である。（ロ）架橋性親水加工剤が付与された繊維の水中沈降時
間が１０秒以下である。なお、これらの測定方法は後述する。【０００９】本発明に用いられる疎水性合成繊維として
は、ポリエステル系繊維、ポリアミド系繊維、ポリビニ
ルアルコール系繊維、ポリオレフィン系繊維等が挙げら
れ、これらは短繊維又は長繊維として使用される。本発
明の吸湿発熱性繊維は、環境を２０℃、４０％ＲＨから
２０℃、９０％ＲＨに変化させた時の吸湿発熱量が１５
Ｊ／ｇ以上である。本発明の吸湿発熱性繊維は、この繊
維を含む紡績糸を用いた衣料等において、着用者の皮膚
表面から不感蒸泄により出される気体状の汗や、液体状
の汗を吸着して発熱する。【００１０】本発明で用いられる吸湿発熱性繊維とし
て、例えば、再生セルロース繊維（ポリノジックレーヨ
ン、ビスコースレーヨン、銅アンモニア法レーヨン、リ
ヨセル等）、カルボキシル基又はアミノ基を有する水溶
性ビニル化合物が導入されたセルロースからなる繊維、
特許第２０２８４６７号明細書に開示されたアクリル酸
系吸湿発熱性繊維等が好ましい。本発明の吸湿発熱性繊
維は、単糸繊度は、好ましくは０．６〜２．２ｄｔｅ
ｘ、より好ましくは０．８〜１．６ｄｔｅｘである。単
糸繊度が０．６ｄｔｅｘ未満の繊維は製造効率が悪く、
単糸繊度が２．２ｄｔｅｘを越えると肌触りが硬くなり
易くなる。この繊維は、長繊維であっても短繊維であっ
てもよいが、疎水性合成繊維又は吸湿発熱性繊維の少な
くとも一方は短繊維であることが必要である。【００１１】前記のアクリル酸系吸湿発熱性繊維は、色
がピンク色であり、任意の色に染色することができない
という問題点がある。また、アクリル酸系吸湿発熱繊維
やビニル化合物を導入したセルロース繊維は、その製法
からいずれも高価な繊維にならざるを得なかった。した
がって、高コストと染色性と編織物とした場合の強度不
足の問題とがあいまって、これらの吸湿発熱性繊維は、
従来、肌着等の日用衣料として、アクリル酸系吸湿発熱
性繊維は、実質的に低い含有率でしか用いることができ
なかった。一方、衣料等の吸湿発熱性は、吸湿発熱性繊
維の含有率に依存するため、含有率が低いと吸湿発熱量
が低くならざるを得なかった。また、アクリル酸系吸湿
発熱性繊維及び吸湿発熱性セルロース繊維は、吸湿速度
及び放湿速度が低いため、衣服内の調湿機能としてはレ
スポンスが遅いという問題があった。【００１２】本発明は、このような問題を、前記の疎水
性合成繊維を３０質量％以上と吸湿発熱性繊維を４０質
量％以上含む紡績糸によって解決し、総合保温性の向上
を達成した。単糸繊度が０．１〜１．３ｄｔｅｘの疎水
性合成繊維が４０質量％未満の場合、体温の保持性が不
充分である。本発明の吸湿発熱性繊維が３０質量％未満
の場合、十分な発熱量が得られない。【００１３】本発明において、吸湿発熱性繊維として、
例えば、再生セルロース（吸湿発熱量１６Ｊ／ｇ）を用
いた場合、紡績糸中の割合は３０〜６０質量％が好まし
く、より好ましくは４０〜５０質量％である。再生セル
ロースをメタクリル酸で処理した繊維（吸湿発熱量は３
２Ｊ／ｇ）を用いた場合、紡績糸中の割合は２０〜６０
質量％が好ましい。本発明は、紡績糸を構成要件とする
点も重要である。紡績糸の形態とすることによって、紡
績糸を構成する繊維間に多数の空隙が形成され、疎水性
合成繊維と吸湿発熱性繊維の特性とが相俟って、本発明
の紡績糸を用いた衣料の総合保温性が、一層大きく向上
する。【００１４】本発明において、これらの繊維以外の繊維
を３０質量％未満の範囲で用いることができる。このよ
うな繊維には制限がなく、衣料等に用いられる各種の繊
維を用いることができる。本発明の紡績糸の吸湿発熱量
は、４．８Ｊ／ｇ以上が好ましく、このような紡績糸を
用いた衣料は８．０Ｗ／ｍ²・℃以下という、優れた総
合保温性能を発揮することができる。【００１５】本発明の紡績糸は、疎水性合成繊維と吸湿
発熱性繊維が複合されているものであるが、複合形態は
限定されるものではなく、例えば、短繊維をいわゆるカ
ード段階で混繊した混紡糸、短繊維と短繊維による芯鞘
糸、短繊維と長繊維による芯鞘糸、サイロフィル糸等が
ある。撚り係数は低い方が繊維間の空隙が保たれ、総合
保温性を高めるために好ましい。また、単糸、双糸、３
本撚り糸等であってもよい。紡績糸を加撚したものであ
ってもよいが、加撚数は８００回／ｍ未満が繊維内空隙
を保つために好ましい。【００１６】本発明の紡績糸は、これを含む編物、織物
等の布帛、及び縫製品として用いることができる。すな
わち、衣料、毛布、スカーフ、マフラー、帽子、手袋、
靴下、座布団等に使用することにより、人の体温を積極
的に維持し守るために有効に働く。また布帛及び縫製品
の一部に用いてもよい。【００１７】【発明の実施の形態】以下、本発明を具体例に基づいて
説明する。本発明に用いられる評価方法は下記の通りで
ある。（１）繊維及び紡績糸の吸湿発熱量（１）−１試料の絶乾重量の測定試料を９０℃の乾燥機中に３時間静置後、絶乾重量（Ｗ
０）（単位：ｇ）を測定する。（１）−２測定方法試料（絶乾重量（Ｗ０）ｇ）をあらかじめ十分に乾燥さ
せておく。示差走査熱量計ＤＳＣを用い、試料室に窒素
ガス（２０℃、０％ＲＨ）を流して試料を熱的平衡状態
にした後、２０℃、（Ａ）％ＲＨ（Ａ＞１０）の窒素ガ
スを流し、発熱開始から熱的平衡に達するまでの総発熱
量（Ｘ）（単位：Ｊ）を測定する。【００１８】（１）−３試料の水分率の測定（ａ）試料の２０℃、（Ａ）％ＲＨにおける試料の水分
率（ＨＡ）％試料を９０℃の乾燥機中に３時間静置し、絶乾重量（Ｗ
０）（単位：ｇ）を測定する。続いて、試料を２０℃、
（Ａ）％ＲＨの恒温恒湿漕に２４ｈｒ以上静置後、試料
の質量（WＡ）（単位：ｇ）を測定する。水分率（ＨＡ）％＝｛（ＷＡ−Ｗ０）／Ｗ０｝×１００【００１９】（ｂ）試料の２０℃、４０％ＲＨにおける
試料の水分率（Ｈ２０）％絶乾後の試料を２０℃、４０％ＲＨの恒温恒湿漕に２４
ｈｒ以上静置後、試料の質量（W２０）（単位：ｇ）を
測定する。水分率（Ｈ２０）％＝｛（Ｗ２０−Ｗ０）／Ｗ０｝×１
００（ｃ）試料の２０℃、９０％ＲＨにおける試料の水分率
（Ｈ９０）％絶乾後の試料を２０℃、９０％ＲＨの恒温恒湿漕に２４
ｈｒ以上静置後、試料の質量（W９０）（単位：ｇ）を
測定する。水分率（Ｈ９０）％＝｛（Ｗ９０−Ｗ０）／Ｗ０｝×１
００（ｄ）吸湿発熱量Ｘ×（Ｈ９０−Ｈ４０）／（Ｗ０×ＨA）を吸湿発熱量
（Ｊ／ｇ）とする。【００２０】（２）総合保温性（２）−１試料の調整紡績糸（試料）を用いて丸編機（福原精機（株）製２０
Ｇ２１インチ径）によりフライス編地を作成し、ウイン
ス染色機にて界面活性剤（スコアロール（登録商標）、
花王（株）製）２ｇ／ｌを入れて９７℃で３０分間ボイ
ル処理後、十分に水洗する。これを遠心脱水機により１
分間脱水し、しわを手でのばした後、乾燥機に入る大き
さに裁断し、６０℃の乾燥機内で平干し状態で乾燥させ
る。得られた編地を１５ｃｍ角に裁断し、測定試料とす
る。測定試料を環境試験室２２℃５２％ＲＨ環境に１昼
夜静置後に測定する。【００２１】（２）−２測定方法２２℃、５２％ＲＨに設定した恒温恒湿装置内におい
て、試料を３２℃の一定温を保つ熱板（サーモラボ（登
録商標）ＩＩ、カトーテック(株)製）の上にのせ、１５
分間静置する。この時、試料には１５ｃｍ／ｓｅｃの整
流された空気を真上より流し、一方向に排出させてお
く。続いて、恒温恒湿装置内の環境を１５分間で２２℃
９０％まで変化させ、その後、１５分間静置する。湿度
を変化させ始めた時点から３０分間にわたり、試料をの
せた熱板の温度を３２℃に保つのに必要な電力を計測
し、１分あたりの平均値をもって、保温性を表す。単位
はＷ／ｍ ²・℃である。【００２２】（３）微小捲縮数が１以下である繊維の本
数比率紡績糸（試料）を沸水中に２０分間浸漬する。沸水処理
した試料からランダムに５カ所を採取し、解撚して単繊
維状とする。単繊維として２０本づつを５カ所から抜き
取り、合計１００本の単繊維を電子顕微鏡の試料台上に
カーボンの両面テープを使用して無緊張状態で貼り付け
る。電子顕微鏡で１００倍に拡大して単繊維あたり１枚
の写真を撮影し、繊維軸方向における長さ０．５ｍｍ間
の山の数と谷の数を合計して２で割った数を各写真毎に
算出し、微小捲縮数が１以下である繊維の本数比率を求
める。【００２３】（４）紡績糸の水中沈降時間日本薬局方：バスケット法に準拠する。架橋性親水加工剤が付与された紡績糸を解撚し、単繊維
状にしたものを試料とする。試料５ｇを採取し、径０．
４ｍｍの銅線を用いて作製した、径５０．０ｍｍ、深さ
８０．０ｍｍ、線と線の距離２０ｍｍ、重さ３．０ｇの
試験カゴの中に試料を入れ、水温２４〜２６℃の水面上
に１２ｍｍの高さからカゴを横にし、深さ２００ｍｍの
水の中に静かに落とす時に、カゴが水面下に沈むまでの
時間をｎ＝３で計測した平均値を水中沈降時間とする。
紡績糸が染色後のものである場合は、染色仕上げ剤の影
響を排除するため、あらかじめ４０℃で１０分間×２回
の湯洗処理を実施する。【００２４】【実施例１】疎水性合成繊維として、単繊維繊度１．０
ｄｔｅｘ、繊維長５１ｍｍの抗ピリング性アクリル繊維
（「エルサニー」（登録商標）、旭化成（株）製）を、
吸湿発熱性繊維として、単繊維繊度１．４ｄｔｅｘ、繊
維長５１ｍｍ、吸湿発熱量１６Ｊ／ｇの銅アンモニアレ
ーヨン（ベンベルグ（登録商標）、旭化成（株）製）を
用いて、前者６０質量％、後者４０質量％の割合で混紡
して、１／６４Ｎｍ、吸湿発熱量７．２Ｊ／ｇの吸湿発
熱性紡績糸を得た。【００２５】【実施例２】疎水性合成繊維として、単繊維繊度１．０
ｄｔｅｘ、繊維長５１ｍｍのアクリル繊維（「エルサニ
ー」（登録商標）、旭化成（株）製）と、単繊維繊度
０．９ｄｔｅｘ、繊維長５１ｍｍの嵩高アクリル繊維
（カシミロン（登録商標）、旭化成（株）製）、吸湿発
熱性繊維として、単繊維繊度１．４ｄｔｅｘ、繊維長５
１ｍｍ、吸湿発熱量１６Ｊ／ｇの銅アンモニアレーヨン
（ベンベルグ（登録商標）、旭化成社（株）製）を用い
て、前者２５質量％、中者３５質量％、後者質量４０％
の割合で混紡して、１／６４Ｎｍ、吸湿発熱量７．２Ｊ
／ｇの吸湿発熱性紡績糸を得た。【００２６】【実施例３】疎水性合成繊維として、単繊維繊度１．０
ｄｔｅｘ、繊維長５１ｍｍの抗ピリング性アクリル繊維
（「エルサニー」（登録商標）、旭化成（株）製）を、
吸湿発熱性繊維として、吸湿発熱量１６Ｊ／ｇ、５６ｄ
ｔｅｘ３０フィラメントの銅アンモニアレーヨン（ベン
ベルグ（登録商標）、旭化成（株）製）を用いて、前者
７１質量％、後者２９質量％の割合で、サイロフィル法
により、１／６４Ｎｍ、吸湿発熱量５．６Ｊ／ｇの吸湿
発熱性紡績糸を得た。【００２７】【実施例４】疎水性合成繊維として、単繊維繊度１．０
ｄｔｅｘ、繊維長５１ｍｍの抗ピリング性アクリル繊維
（「エルサニー」（登録商標）、旭化成（株）製）を、
吸湿発熱性繊維として、単繊維繊度１．７ｄｔｅｘ、繊
維長５１ｍｍの銅アンモニアレーヨン（ベンベルグ（登
録商標）、旭化成（株）製）をメタクリル酸で処理し
た、吸湿発熱量３２Ｊ／ｇの繊維を用いて、前者８０質
量％、後者２０質量％の割合で混紡して、１／６４Ｎ
ｍ、吸湿発熱量７．５Ｊ／ｇの吸湿発熱性紡績糸を得
た。【００２８】【比較例１】疎水性合成繊維として、単繊維繊度１．７
ｄｔｅｘ、繊維長５１ｍｍのアクリル繊維（カシミロン
（登録商標）、旭化成（株）製）を、吸湿発熱性繊維と
して、単繊維繊度１．４ｄｔｅｘ、繊維長５１ｍｍ、吸
湿発熱量１６Ｊ／ｇの銅アンモニアレーヨン（ベンベル
グ（登録商標）、旭化成（株）製）を用いて、前者６０
質量％、後者４０質量％の割合で混紡して、１／６４Ｎ
ｍ、吸湿発熱量７．２Ｊ／ｇの吸湿発熱性紡績糸を得
た。【００２９】【比較例２】単繊維繊度１．４ｄｔｅｘ、繊維長５１ｍ
ｍ、吸湿発熱量１６Ｊ／ｇの銅アンモニアレーヨン（ベ
ンベルグ（登録商標）、旭化成（株）製）からなる、綿
番４０／−の紡績糸を比較例２とした。【００３０】【比較例３】単繊維繊度１．７ｄｔｅｘ、繊維長５１ｍ
ｍの銅アンモニアレーヨン（ベンベルグ（登録商標）、
旭化成（株）製）をメタクリル酸で処理した、吸湿発熱
量３２．０Ｊ／ｇの繊維からなる、綿番４０／−の紡績
糸を比較例３とした。【００３１】【比較例４】単繊維繊度１．０ｄｔｅｘ、繊維長５１ｍ
ｍ、吸湿発熱量１．４Ｊ／ｇの抗ピリング性アクリル繊
維（「エルサニー」（登録商標）、旭化成（株）製）か
らなる、１／６４Ｎｍの紡績糸を比較例４とした。実施
例１〜４及び比較例１〜４の紡績糸を丸編機（福原精機
(株)製２０Ｇ２１インチ径）によりフライス編地とし、
ウインス染色機にて界面活性剤（スコアロール（登録商
標）、花王（株）製）２ｇ／ｌを加えて、９７℃で３０
分間ボイル処理後、十分に水洗した。これを遠心脱水機
により１分間脱水し、しわを手でのばした後、乾燥機に
入る大きさに裁断し、６０℃の乾燥機内で平干し状態で
乾燥させた。得られた編地を１５ｃｍ角に裁断し、測定
試料とした。測定試料を環境試験室２２℃５２％ＲＨ環
境に１昼夜静置後に総合保温性を評価した。結果を表１
に示す。【００３２】表１によると、実施例１〜４の編地の総合
保温性が７．２〜７．８Ｗ／ｍ²・℃であるのに対し、
比較例１から４のそれは８．３〜８．６Ｗ／ｍ²・℃で
あり、本発明の紡績糸からなる編地は、体温を維持する
機能が優れていることが明らかである。着用した時に感
覚的に差を感じるのは、およそ０．３Ｗ／ｍ²・℃以上
であり、実施例１〜４の紡績糸を用いた衣料は、着用感
覚としても比較例より暖かく感じる。【００３３】【表１】【００３４】【発明の効果】本発明の紡績糸は、布帛として、衣料な
どの用いた場合、吸湿発熱性と人体からの熱の逃散阻止
能力（総合保温性）が共に優れた性能を発揮する。DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION The present invention relates to a spinning method having excellent heat retention.
Combined use of cotton yarns, especially microfibers and moisture-absorbing and heat-generating fibers
With this, fabrics suitable for protecting body temperature, such as clothing,
For example, it relates to a spun yarn used for a knitted fabric. [0002] 2. Description of the Related Art Conventionally, as underwear for keeping warm in the cold winter season,
Covering nylon fiber to spandex elastic fiber
Underwear made of mixed covering yarn and cotton, and hollow polyester
Underwear made of synthetic fibers such as tellur fiber and acrylic fiber,
Wool underwear and the like are used. More aggressively
Acrylic acid-based hygroscopic heat generation intended to warm the human body
Clothing using fiber (Japanese Patent No. 2028467),
Moisture absorption by introducing water-soluble vinyl polymer compound into cellulose
Clothing using thermal cellulose fiber (Japanese Patent No. 289,862)
No. 3) is known. However, these
Acrylic acid-based moisture-absorbing and exothermic fibers and moisture-absorbing and exothermic cellulose fibers
Although the fiber has moisture absorption and heat generation, these fibers are used
Clothes may temporarily exhibit heat retention, but
The skin temperature decreases significantly over time,
Lacked the ability to prevent heat from escaping. [0003] SUMMARY OF THE INVENTION The present invention relates to a method for prolonging body temperature.
Maintained for a long time, it is difficult for heat to escape from the body, comprehensive heat retention
With the aim of providing spun yarns suitable for clothing, etc.
Target. [0004] Means for Solving the Problems The present inventors have solved the above problems.
As a result of repeated studies to solve the problem, the present invention is completed
Reached. That is, in the present invention, the single yarn fineness is 0.1 to
1.3 dtex of hydrophobic synthetic fiber of 40% by mass or more,
Change environment from 20 ℃, 40% RH to 20 ℃, 90% RH
Moisture absorption when the heat generated by moisture absorption is 15 J / g or more
It is a spun yarn containing 30% by mass or more of thermal fibers. Hereinafter, the present invention will be described. Of the present invention
Spun yarn not only absorbs heat and absorbs heat, but also escapes heat from the human body.
It is a material for clothing with excellent stopping power. Conventionally, warm clothing
Fibers that are known for
The purpose is to improve only one of the
Clothing using such fibers still absorbs moisture.
Poor thermal performance, improved moisture absorption and heat generation performance
Also, when used as clothing, the ability to prevent heat from escaping from the human body
Poor power to sustain heat from the human body
Was lacking. [0006] The present invention provides a garment for preventing heat from escaping from the human body.
It focuses on providing anti-static performance,
Thermal properties and ability to prevent heat from escaping from the human body
In total, it is said that the overall heat retention)
It is a spun yarn suitable as a material. Comprehensive warmth is worn by people
An index that indicates the overall warmth and body temperature maintenance that you feel during use
As described later, the environment of the fiber is 22 ° C. and 52% R
Ability to maintain body temperature when changing from H to 22 ° C 90% RH
Obtained by measuring force. 52% RH in Tokyo in February
Soaking humidity (1961-1990), 90% RH
It is assumed that a person sweats due to exercise. Comprehensive thermal insulation
The temperature of the hot plate at 32 ° C, assuming the skin temperature under clothing,
Expressed by the amount of energy required to maintain the degree. The effect of the present invention is that the fineness of single yarn is
0.1-1.3 dtex hydrophobic synthetic fiber and environment
0 ° C, 40% RH was changed to 20 ° C, 90% RH
Heat-absorbing heat-generating fiber having a heat-absorbing heat value of 15 J / g or more
This is achieved by a spun yarn containing: Hydrophobic compound of the present invention
The synthetic fiber has a single yarn fineness of 0.1 to 1.3 dtex,
Preferably it is 0.5 to 1.1 dtex. Single yarn fineness
In this range, the diameter of the void in the fiber becomes small,
Ventilation resistance increases, dead air increases, heat
Improves the ability to prevent escape and absorbs moisture from heat-generating fibers
The calorific value can be maintained for a long time. Single yarn fineness
If it exceeds 1.3 dtex, the diameter of the inter-fiber space becomes large.
The overall heat retention is reduced. Also the touch is tingling
Gives discomfort during wear. Single yarn fineness is less than 0.1 dtex
When full, the bending stiffness of the single fiber is low,
Substantial decrease in voids in fibers due to the addition of compression pressure
Therefore, the overall heat retention decreases. [0008] In order to further enhance the overall heat retention, hydrophobic
50% by mass or more of the fibers are bulk processed fibers
Is preferred. The hydrophobic synthetic fiber has the following (A) and / or
If the condition (b) is satisfied, wear and wash repeatedly
Maintain high flexibility and excellent surface morphological stability.
Because it is difficult to make a ring and the occurrence of tingling is suppressed
Preferred. (A) Fiber axis direction of single fiber after spun yarn is subjected to boiling water treatment
The number of micro-crimps between 0.5 mm is 1 or less
The ratio of the number is 70% or more. (B) At the time of sedimentation of the fiber to which the crosslinkable hydrophilic processing agent has been added in water
The time is 10 seconds or less. In addition, these measuring methods are mentioned later. As the hydrophobic synthetic fiber used in the present invention,
Means polyester fiber, polyamide fiber, polyvinyl
Alcohol fibers, polyolefin fibers, etc.
These are used as short fibers or long fibers. Departure
Ming's moisture-absorbing and heat-generating fiber can be used in an environment of
When the temperature is changed to 20 ° C and 90% RH, the heat of moisture absorption is 15
J / g or more. The moisture-absorbing and heat-generating fiber of the present invention
In the case of clothing using spun yarn containing fibers, the skin of the wearer
Gaseous sweat or liquid produced by insensitive evaporation from the surface
It absorbs sweat and generates heat. The heat-absorbing and heat-generating fiber used in the present invention is
For example, regenerated cellulose fibers (polynosic rayo
, Viscose rayon, copper ammonia method rayon,
Water) having carboxyl group or amino group
Fibers made of cellulose in which a hydrophilic vinyl compound is introduced,
Acrylic acid disclosed in Japanese Patent No. 2028467
Heat-absorbing and heat-generating fibers are preferred. Heat-absorbing heat-generating fiber of the present invention
The fiber preferably has a single fiber fineness of 0.6 to 2.2 dte.
x, more preferably 0.8 to 1.6 dtex. single
Fibers with a yarn fineness of less than 0.6 dtex have poor production efficiency,
If the single yarn fineness exceeds 2.2 dtex, the skin becomes hard
It will be easier. This fiber may be long or short.
May be used, but the amount of hydrophobic synthetic fibers or
At least one must be short fiber. The above-mentioned acrylic acid-based moisture-absorbing and heat-generating fibers are colored
Is pink and cannot be dyed to any color
There is a problem. In addition, acrylic acid-based moisture-absorbing heating fiber
Cellulose fiber with vinyl compound or vinyl compound
Therefore, all had to be expensive fibers. did
As a result, high cost, dyeability, and strength
Coupled with foot problems, these hygroscopic heat-generating fibers
Conventionally, acrylic acid-based hygroscopic heat is used as daily clothing such as underwear.
Conductive fibers can only be used at a substantially lower content
Did not. On the other hand, the moisture-absorbing and heat-generating properties of
It depends on the content of fiber, so if the content is low, the heat of moisture absorption
Had to be low. Also, acrylic acid-based moisture absorption
Exothermic fiber and moisture-absorbing exothermic cellulose fiber have a moisture absorption rate
And the low moisture release rate, the humidity
There was a problem that the sponge was slow. The present invention solves such a problem by the above-mentioned hydrophobicity.
30% by mass or more of water-soluble synthetic fiber and 40 kinds of moisture-absorbing and heat-generating fiber
Solved by using spun yarn containing more than%, improving overall heat retention
Was achieved. Hydrophobic with single fiber fineness of 0.1 to 1.3 dtex
When the synthetic fiber content is less than 40% by mass, retention of body temperature is poor.
Is enough. Less than 30% by mass of the heat-absorbing and heat-generating fiber of the present invention
In the case of, a sufficient heat value cannot be obtained. In the present invention, the heat-absorbing and heat-generating fiber is
For example, using regenerated cellulose (moisture absorption heat value 16 J / g)
If it is, the proportion in the spun yarn is preferably 30 to 60% by mass.
And more preferably 40 to 50% by mass. Play cell
Loin treated with methacrylic acid
2J / g), the ratio in the spun yarn is 20 to 60.
% By mass is preferred. The present invention uses spun yarn as a constituent requirement.
The point is also important. By taking the form of spun yarn,
Numerous voids are formed between the fibers that make up the yarn,
The present invention combines the properties of synthetic fibers and heat-absorbing and heat-generating fibers.
The overall warmth of clothing using spun yarns has been greatly improved
I do. In the present invention, fibers other than these fibers
Can be used in a range of less than 30% by mass. This
There are no restrictions on una fiber, and various fibers used in clothing and the like are used.
Fiber can be used. Moisture absorption heat value of spun yarn of the present invention
Is preferably 4.8 J / g or more.
The clothing used was 8.0 W / m^Two・ Excellent total of below ℃
Combined heat insulation performance can be exhibited. The spun yarn of the present invention comprises a hydrophobic synthetic fiber and a moisture-absorbing synthetic fiber.
The exothermic fiber is composite, but the composite form is
Without limitation, for example, short fibers are
Core-sheath made of blended yarn, staple fiber and staple fiber blended at the loading stage
Yarns, core-sheath yarns made of short and long fibers, silofil yarns, etc.
is there. The lower the twist coefficient, the more the gap between fibers is maintained,
It is preferable to increase heat retention. In addition, single yarn, twin yarn, 3
Mainly twisted yarn or the like may be used. Spun yarn twisted
However, the number of twists is less than 800 turns / m
It is preferable to keep The spun yarn of the present invention is a knitted or woven fabric containing the same.
And the like, and sewing products. sand
Washi, clothing, blankets, scarves, scarves, hats, gloves,
Actively increase human body temperature by using socks and cushions
Works effectively to maintain and protect the environment. Also fabric and sewing products
May be used as a part of. [0017] DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on specific examples.
explain. The evaluation method used in the present invention is as follows
is there. (1) Moisture absorption and heat generation of fiber and spun yarn (1) -1 Measurement of absolute dry weight of sample After the sample was allowed to stand in a dryer at 90 ° C. for 3 hours, the absolute dry weight (W
0) (unit: g) is measured. (1) -2 Measurement method The sample (absolute dry weight (W0) g) is thoroughly dried beforehand.
Let me know. Using a differential scanning calorimeter DSC, add nitrogen
The sample is in thermal equilibrium by flowing gas (20 ° C, 0% RH)
After that, a nitrogen gas of 20 ° C. and (A)% RH (A> 10)
Total heat from the start of heat generation to the point at which thermal equilibrium is reached
The amount (X) (unit: J) is measured. (1) -3 Measurement of moisture content of sample (A) Moisture of sample at 20 ° C. and (A)% RH of sample
Rate (HA)% The sample was allowed to stand in a drier at 90 ° C. for 3 hours, and the absolute dry weight (W
0) (unit: g) is measured. Subsequently, the sample was heated at
(A) Samples after standing for at least 24 hours in a constant temperature and humidity chamber of% RH
Is measured (unit: g). Moisture percentage (HA)% = {(WA−W0) / W0} × 100 (B) Sample at 20 ° C. and 40% RH
Moisture content (H20)% of sample The dried sample is placed in a constant temperature and humidity chamber at 20 ° C and 40% RH for 24 hours.
After standing for at least hr, the mass (W20) (unit: g)
Measure. Moisture percentage (H20)% = {(W20−W0) / W0} × 1
00 (C) Moisture content of the sample at 20 ° C. and 90% RH
(H90)% The dried sample is placed in a constant temperature and humidity chamber at 20 ° C and 90% RH for 24 hours.
After standing for at least hr, the mass (W90) (unit: g)
Measure. Moisture percentage (H90)% = {(W90−W0) / W0} × 1
00 (D) Heat value of moisture absorption X × (H90-H40) / (W0 × HA) is the heat value of moisture absorption
(J / g). (2) Total heat retention (2) -1 Sample preparation Circular knitting machine (Fukuhara Seiki Co., Ltd. 20) using spun yarn (sample)
G21 inch diameter) to create a milling knitted fabric and win
Surfactant (Score Roll (registered trademark),
Add 2g / l of Kao Corporation and boil at 97 ° C for 30 minutes
After washing, wash thoroughly. This is centrifuged dehydrator 1
Dehydrate for a minute, remove the wrinkles by hand, and then enter the dryer.
Cut into pieces and dried in a 60 ° C dryer
You. The obtained knitted fabric is cut into 15 cm squares and used as a measurement sample.
You. Place the measurement sample in the environmental test room at 22 ° C and 52% RH for one day.
Measure after standing at night. (2) -2 Measurement method In a thermo-hygrostat set at 22 ° C and 52% RH
And heat the sample to a constant temperature of 32 ° C.
(Registered trademark) II, manufactured by Kato Tech Co., Ltd.), 15
Let stand for minutes. At this time, the sample was adjusted to 15 cm / sec.
Allow the flow of air to flow from directly above
Good. Subsequently, the environment in the thermo-hygrostat was set at 22 ° C. for 15 minutes.
Change to 90%, then let stand for 15 minutes. Humidity
For 30 minutes after starting to change the sample
Measures the power required to maintain the temperature of the heated hot plate at 32 ° C
The average value per minute indicates the heat retention. unit
Is W / m ^Two・ It is ° C. (3) A book of fibers having a number of micro-crimps of 1 or less
Number ratio The spun yarn (sample) is immersed in boiling water for 20 minutes. Boiling water treatment
Randomly picked 5 places from the sample, untwisted and
Weir shape. Pull out 20 filaments from 5 locations as single fibers
Take a total of 100 single fibers on a sample stage of an electron microscope
Paste without tension using carbon double-sided tape
You. Enlarge 100 times with an electron microscope, one piece per single fiber
Take a photograph of the length of 0.5 mm in the fiber axis direction
The sum of the number of valleys and the number of valleys is divided by 2 for each photo
Calculate and find the ratio of the number of fibers with a micro-crimp number of 1 or less.
I will. (4) Settling time of spun yarn in water Japanese Pharmacopoeia: Complies with the Basket Law. Untwist the spun yarn to which the crosslinkable hydrophilic processing agent has been added, and
The sample is used as a sample. A sample (5 g) was collected, and the diameter was set to 0.
Diameter 50.0mm, depth made using 4mm copper wire
80.0 mm, distance between lines 20 mm, weight 3.0 g
Place the sample in the test basket and place it on the surface of the water at 24-26 ° C.
The basket is laid from a height of 12 mm to a depth of 200 mm
When you drop it gently into the water,
The average value obtained by measuring the time at n = 3 is defined as the sedimentation time in water.
If the spun yarn has been dyed, the shade of the dye finish
2 times at 40 ° C for 10 minutes beforehand to eliminate sound
Of hot water. [0024] Example 1 A single fiber fineness of 1.0 was used as a hydrophobic synthetic fiber.
dtex, anti-pilling acrylic fiber with 51 mm fiber length
("El Sunny" (registered trademark), manufactured by Asahi Kasei Corporation)
Single fiber fineness 1.4 dtex, fine
Copper ammonia glass with a fiber length of 51 mm and a heat absorption value of 16 J / g
-Yeon (Bemberg (registered trademark), manufactured by Asahi Kasei Corporation)
Blended at a ratio of 60% by mass and 40% by mass
1 / 64Nm, moisture absorption heat generation 7.2J / g
A thermally spun yarn was obtained. [0025] Example 2 As a hydrophobic synthetic fiber, a single fiber fineness of 1.0 was used.
dtex, 51 mm fiber length acrylic fiber ("Ersani
-"(Registered trademark), manufactured by Asahi Kasei Corporation) and single fiber fineness
0.9dtex, bulky acrylic fiber with 51mm fiber length
(Cashmilon (registered trademark), manufactured by Asahi Kasei Corporation), moisture absorption
As thermal fibers, single fiber fineness 1.4 dtex, fiber length 5
1mm, copper ammonia rayon with heat absorption value of 16J / g
(Bemberg (registered trademark), manufactured by Asahi Kasei Corporation)
The former 25 mass%, the middle 35 mass%, the latter mass 40%
1/64 Nm, heat absorption by moisture absorption 7.2 J
/ G / moisture-absorbing exothermic spun yarn. [0026] Example 3 As a hydrophobic synthetic fiber, a single fiber fineness of 1.0 was used.
dtex, anti-pilling acrylic fiber with 51 mm fiber length
("El Sunny" (registered trademark), manufactured by Asahi Kasei Corporation)
As moisture-absorbing and heat-generating fiber, moisture-absorbing heat value of 16 J / g, 56 d
tex30 filament copper ammonia rayon (Ben
Berg (registered trademark) manufactured by Asahi Kasei Corporation)
Silofil method at a ratio of 71% by mass and the latter at 29% by mass
Moisture absorption of 1/64 Nm and heat generation of 5.6 J / g
An exothermic spun yarn was obtained. [0027] Example 4 A single fiber fineness of 1.0 was used as the hydrophobic synthetic fiber.
dtex, anti-pilling acrylic fiber with 51 mm fiber length
("El Sunny" (registered trademark), manufactured by Asahi Kasei Corporation)
Single fiber fineness of 1.7 dtex, fine fiber
51mm long copper ammonia rayon (Bemberg
(Registered trademark) and Asahi Kasei Corporation) treated with methacrylic acid.
In addition, the fiber of the former 80 quality was
%, The latter at 20% by mass.
m, a moisture-absorbing and heat-generating spun yarn having a moisture-absorbing heat value of 7.5 J / g was obtained.
Was. [0028] Comparative Example 1 A single fiber fineness of 1.7 was used as the hydrophobic synthetic fiber.
dtex, 51 mm fiber length acrylic fiber (Cashmilon
(Registered trademark), manufactured by Asahi Kasei Corporation)
Then, a single fiber fineness of 1.4 dtex, a fiber length of 51 mm, and a suction
Copper ammonia rayon with a heating value of 16 J / g (Bembel
(Registered trademark) manufactured by Asahi Kasei Corporation)
1 / 64N by blending at a ratio of 40% by mass
m, a moisture-absorbing and heat-generating spun yarn having a moisture-absorbing heat value of 7.2 J / g was obtained.
Was. [0029] Comparative Example 2 Single fiber fineness 1.4 dtex, fiber length 51 m
m, copper ammonia rayon with a heat absorption of 16 J / g
Cotton made of N. Nberg (registered trademark) and Asahi Kasei Corporation)
The No. 40 /-spun yarn was used as Comparative Example 2. [0030] Comparative Example 3 Single fiber fineness: 1.7 dtex, fiber length: 51 m
m copper ammonia rayon (Bemberg (registered trademark),
Asahi Kasei Co., Ltd.) treated with methacrylic acid.
Spinning of cotton number 40 /-consisting of 32.0 J / g fiber
The yarn was Comparative Example 3. [0031] Comparative Example 4 Single fiber fineness: 1.0 dtex, fiber length: 51 m
m, anti-pilling acrylic fiber with heat absorption of 1.4 J / g
Wei (“El Sunny” (registered trademark), manufactured by Asahi Kasei Corporation)
A 1/64 Nm spun yarn was used as Comparative Example 4. Implementation
A circular knitting machine (Fukuhara Seiki Co., Ltd.) was used for the spun yarns of Examples 1 to 4 and Comparative Examples 1 to 4.
Milling knitted fabric by 20G21 inch diameter manufactured by
Surfactant (score roll (registered trademark)
2 g / l) and 97 ° C at 30 ° C.
After boiled for a minute, it was thoroughly washed with water. This is a centrifugal dehydrator
Dehydrate for 1 minute, remove wrinkles by hand, and dry
Cut into pieces that fit into each other and lay flat in a 60 ° C dryer.
Let dry. Cut the obtained knitted fabric into 15 cm square and measure
A sample was used. The measurement sample was placed in an environmental test room at 22 ° C and 52%
After standing at the border one day and night, the overall heat retention was evaluated. Table 1 shows the results
Shown in According to Table 1, the knitted fabrics of Examples 1 to 4 were synthesized.
7.2-7.8W / m heat retention^Two・ In contrast to ° C,
It is 8.3 to 8.6 W / m in Comparative Examples 1 to 4.^Two・ At ° C
Yes, the knitted fabric made of the spun yarn of the present invention maintains body temperature
It is clear that the function is excellent. Feeling when worn
About 0.3W / m^Two・ ℃ or more
The clothing using the spun yarns of Examples 1 to 4 has a feeling of wearing.
It feels warmer than the comparative example. [0033] [Table 1] [0034] As described above, the spun yarn of the present invention can be used for fabrics such as clothing.
When used, it absorbs and absorbs heat and prevents heat from escaping from the human body
Both performances (total heat retention) demonstrate excellent performance.

Claims

【特許請求の範囲】【請求項１】単糸繊度が０．１〜１．３ｄｔｅｘの疎
水性合成繊維を４０質量％以上と、環境を２０℃、４０
％ＲＨから２０℃、９０％ＲＨに変化させた時の吸湿発
熱量が１５Ｊ／ｇ以上である吸湿発熱性繊維を３０質量
％以上含む紡績糸。Claims 1. A synthetic fiber having a single fiber fineness of 0.1 to 1.3 dtex is 40% by mass or more, and the environment is 20 ° C and 40 ° C.
A spun yarn containing 30% by mass or more of a moisture-absorbing heat-generating fiber having a moisture-absorbing heat generation value of 15 J / g or more when the temperature is changed from 20% RH to 20 ° C. and 90% RH.