JP2781330B2 - Fiber density measurement method - Google Patents
Fiber density measurement methodInfo
- Publication number
- JP2781330B2 JP2781330B2 JP23484993A JP23484993A JP2781330B2 JP 2781330 B2 JP2781330 B2 JP 2781330B2 JP 23484993 A JP23484993 A JP 23484993A JP 23484993 A JP23484993 A JP 23484993A JP 2781330 B2 JP2781330 B2 JP 2781330B2
- Authority
- JP
- Japan
- Prior art keywords
- density
- fiber
- surfactant
- fibers
- metal salt
- 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
Links
Landscapes
- Treatment Of Fiber Materials (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、有機溶媒特に大気汚染
等環境問題を引起こすハロゲン化炭化水素を使用しない
新規の繊維密度測定法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel fiber density measuring method which does not use an organic solvent, particularly a halogenated hydrocarbon which causes environmental problems such as air pollution.
【０００２】[0002]
【従来の技術】従来、繊維の密度測定は、天然繊維、化
学繊維ともＪＩＳ Ｌ１０１３（「化学繊維フィラメン
ト系試験方法」）あるいはＪＩＳ Ｌ１０１５（「化学
繊維ステープル試験方法」）に記載の方法に準拠して行
われてきた。しかし、これらの方法は、密度が極端に低
いポリプロピレン繊維を除き他の繊維はすべて、四塩化
炭素とｎ―ヘプタン、トルエンもしくはリグロインとの
組合せの有機溶媒中で測定するものである。ところが、
近年の地球環境問題の浮上から、オゾン層破壊につなが
る四塩化炭素の使用は種々制約を受けるばかりでなく、
近い将来利用できなくなる怖れもあり、四塩化炭素を使
用しない繊維の密度測定法開発が待望されている。2. Description of the Related Art Conventionally, the measurement of fiber density is based on the method described in JIS L1013 ("Chemical fiber filament-based test method") or JIS L1015 ("Chemical fiber staple test method") for both natural fibers and chemical fibers. Has been done. However, these methods measure all other fibers in an organic solvent of a combination of carbon tetrachloride and n-heptane, toluene or ligroin, except for polypropylene fibers which are extremely low in density. However,
With the emergence of global environmental problems in recent years, the use of carbon tetrachloride, which leads to ozone layer depletion, is not only subject to various restrictions,
There is a fear that it will not be available in the near future, and development of a fiber density measurement method that does not use carbon tetrachloride is expected.
【０００３】他方、プラスチックの密度測定方法（ＪＩ
Ｓ Ｋ７１１２―１９８２）には、ハロゲン化炭化水素
非含有測定媒体として水／臭化ナトリウム、水／硝酸カ
ルシウムあるいは塩化亜鉛／エタノール／水系を用いる
方法が提示されている（但し、測定密度域１．００ｇ／
ｃｍ3 以上）。しかしこれらの方法を繊維に応用して
も、試料繊維表面に多数の気泡が付着して正確な密度が
得られないばかりでなく、データー間のバラツキが大き
く実質上利用不能であった。On the other hand, a method for measuring the density of plastic (JI
SK7112-1982) discloses a method using a water / sodium bromide, water / calcium nitrate or zinc chloride / ethanol / water system as a halogenated hydrocarbon-free measurement medium (provided that the measurement density range is 1.). 00g /
cm 3 or more). However, even when these methods are applied to fibers, not only was a large number of air bubbles adhered to the surface of the sample fiber, so that an accurate density could not be obtained, but also the data had large variations, making it virtually unusable.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、上記従来技
術を背景になされたもので、その目的は、ハロゲン化炭
化水素等の有機溶媒を用いることなく、正確な密度を迅
速に測定することの出来る新規な繊維の密度測定法を提
供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and an object of the present invention is to rapidly measure an accurate density without using an organic solvent such as a halogenated hydrocarbon. It is an object of the present invention to provide a novel method for measuring the density of a fiber.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、上記目的
を達成するため鋭意検討した結果、密度測定液として金
属塩化合物水溶液を用いる場合、測定中に泡が繊維に付
着し易く、また付着した気泡は極めて繊維から離脱し難
いため測定誤差を生じることを知った。そしてかかる現
象を抑制すべく、さらに検討を重ねた結果、密度測定液
中に少量の界面活性剤を共存させることにより、繊維表
面に気泡が全く付着しなくなることを見い出し、本発明
に到達した。Means for Solving the Problems The present inventors have conducted intensive studies to achieve the above object. As a result, when an aqueous solution of a metal salt compound is used as a density measuring solution, bubbles easily adhere to fibers during measurement. It has been found that the attached air bubbles are extremely difficult to separate from the fiber and cause measurement errors. As a result of further studies to suppress such a phenomenon, it has been found that, by coexisting a small amount of a surfactant in the density measurement liquid, no bubbles are attached to the fiber surface at all, and the present invention has been reached.
【０００６】すなわち、本発明によれば、密度測定液と
して金属塩化合物水溶液を用い密度勾配管法により繊維
の密度を測定するに際し、前記金属塩化合物とは実質的
に非反応性の界面活性剤を０．０１〜３．０重量％含有
する密度測定液を用いることを特徴とする繊維の密度測
定方法が提供される。That is, according to the present invention, when a density of a fiber is measured by a density gradient tube method using an aqueous solution of a metal salt compound as a density measuring solution, a surfactant substantially non-reactive with the metal salt compound is used. Is used, wherein a density measurement liquid containing 0.01 to 3.0% by weight is used.
【０００７】繊維の密度測定方法としては、理論上では
いくつかの方法が考えられるが、現在では、試料繊維が
測定液中で浮沈平衡状態となる時の液密度を測定する浮
沈法と、密度が連続的に変化している測定液中で試料が
平衡位置に静止した場所から求める密度勾配管法とが主
流となっている。本発明は、これらのうち、特に密度勾
配管法を対象とするものである。As a method for measuring the fiber density, several methods are theoretically conceivable. At present, however, there is a float-sink method for measuring the liquid density when a sample fiber is in a float-sink state in a measurement solution, and a density method. The density gradient tube method, which is obtained from a place where a sample stops at an equilibrium position in a measurement solution in which the sample is continuously changing, is mainly used. The present invention is particularly directed to the density gradient tube method.
【０００８】本発明で用いられる金属塩化合物は、測定
対象繊維の密度よりも高い密度を有する水溶液が得られ
るもの、好ましくは密度１．４０ｇ／ｃｍ3 以上の高密
度液が得られるものであれば任意であるが、得られる水
溶液が着色している場合には密度勾配管中での試料繊維
の平衡位置を測定することが困難となるので、無色透明
な水溶液の得られるものが好ましい。好ましく用いられ
る金属塩化合物としては、硝酸カルシウム、臭化ナトリ
ウム、塩化カルシウム等を例示することができる。特に
硝酸カルシウムは水への溶解度が大きく、約６０％の水
溶液とすることにより密度約１．４０ｇ／ｃｍ3 といっ
た高密度溶液を容易に調製することができるので好まし
い。なお金属塩化合物の種類によっては、水に溶解させ
る際に吸熱して得られる水溶液の温度を低下させ、液中
に溶解する空気量を増大させて前記気泡発生の問題が多
発する傾向がある。したがって、水への溶解が吸熱であ
る場合には、液温が室温以下に低下しないよう加温しな
がら溶解することが好ましい。[0008] The metal salt compound used in the present invention is one that can provide an aqueous solution having a density higher than the density of the fiber to be measured, and preferably one that can obtain a high-density liquid having a density of 1.40 g / cm 3 or more. It is optional, but if the resulting aqueous solution is colored, it will be difficult to measure the equilibrium position of the sample fiber in the density gradient tube, so that a colorless and transparent aqueous solution is preferred. Examples of preferably used metal salt compounds include calcium nitrate, sodium bromide, calcium chloride and the like. In particular, calcium nitrate is preferable because it has a high solubility in water, and a high-density solution having a density of about 1.40 g / cm 3 can be easily prepared by using an aqueous solution of about 60%. Depending on the type of the metal salt compound, the temperature of the aqueous solution obtained by absorbing heat when dissolved in water is lowered, and the amount of air dissolved in the liquid is increased, so that the problem of the generation of bubbles tends to occur frequently. Therefore, when dissolution in water is endothermic, it is preferable to dissolve while heating so that the liquid temperature does not drop below room temperature.
【０００９】密度勾配管法により繊維の密度を測定する
に際しては、上記金属化合物と水とを適当な割合で配合
した、密度の異なる２種類の密度液を調製するが、本発
明においては、これらの密度液は夫々界面活性剤を０．
０１〜３重量％、好ましくは０．０２〜１重量％（密度
液重量に対して）含有していることが大切である。界面
活性剤の含有量が０．０１重量％未満の場合には、繊維
表面からの気泡離脱効果が不充分となり、密度誤差が大
きくなるだけでなく測定に要する時間も長くなるため好
ましくない。一方３．０重量％を超えて多量に添加して
も、それ以上の向上が認められなくなる上に、測定液も
乳化して透明性が損なわれるため、繊維の平衡沈降位置
を測定し難くなるので好ましくない。In measuring the fiber density by the density gradient tube method, two types of density liquids having different densities prepared by mixing the above metal compound and water at an appropriate ratio are prepared. Each of the density liquids contains 0. 1 surfactant.
It is important that it is contained in an amount of 01 to 3% by weight, preferably 0.02 to 1% by weight (based on the weight of the density liquid). If the content of the surfactant is less than 0.01% by weight, the effect of removing bubbles from the fiber surface becomes insufficient, which not only increases the density error but also increases the time required for measurement, which is not preferable. On the other hand, even if it is added in a large amount exceeding 3.0% by weight, no further improvement is observed, and the measurement liquid is also emulsified to impair the transparency, making it difficult to measure the equilibrium sedimentation position of the fiber. It is not preferable.
【００１０】界面活性剤としては、イオン系、非イオン
系のいずれのダイプをも使用することができるが、金属
塩化合物の種類によっては反応して水不溶性物質を生成
し、本発明の効果が得られなくなる場合があるので、前
記金属塩化合物と実質的に非反応性のものを用いる必要
があり、一般的には非イオン系界面活性剤が好ましい。
例えば金属塩化合物として硝酸カルシウムを用いる場合
には、イオン系界面活性剤は不溶性塩を生成し易いた
め、非イオン系の界面活性剤が好ましく用いられる。具
体的にはポリオキシエチレンメチルエーテル、ポリオキ
シエチレンラウリルエーテル、ポリオキシエチレンオレ
イルエーテル、ポリオキシエチレンモノ―ｐ―イソオク
チルシクロヘキシルエーテル等のアルキルエーテルある
いはポリオキシエチレンフェノールエーテル、ポリオキ
シエチレンノニルフェノールエーテル、ポリオキシエチ
レン―ｐ―イソオクチルフェノールエーテル等のアルキ
ルフェノールエーテルを例示することができる。As the surfactant, any of ionic and nonionic dips can be used, but depending on the type of the metal salt compound, it reacts to form a water-insoluble substance, and the effect of the present invention is reduced. In some cases, a nonionic surfactant must be used, which is substantially non-reactive with the metal salt compound, and nonionic surfactants are generally preferred.
For example, when calcium nitrate is used as the metal salt compound, a nonionic surfactant is preferably used because an ionic surfactant easily forms an insoluble salt. Specifically, alkyl ethers such as polyoxyethylene methyl ether, polyoxyethylene lauryl ether, polyoxyethylene oleyl ether, polyoxyethylene mono-p-isooctylcyclohexyl ether or polyoxyethylene phenol ether, polyoxyethylene nonyl phenol ether, Examples thereof include alkyl phenol ethers such as polyoxyethylene-p-isooctyl phenol ether.
【００１１】前記金属化合物、界面活性剤及び水を適当
に混合して２種類の密度液を調製した後に密度勾配管を
作成するには、例えばＪＩＳ Ｌ１０１３に記載されて
いる公知の方法を採用すればよい。In order to prepare a density gradient tube after preparing the two kinds of density liquids by appropriately mixing the metal compound, the surfactant and water, a known method described in, for example, JIS L1013 may be employed. I just need.
【００１２】なお本発明の方法により繊維の密度を測定
するにあたっては、繊維表面に油剤が付着している場合
にはあらかじめ脱油処理を施す必要がある。特に高温熱
処理された繊維は、油剤成分が残留し易いので、充分脱
油処理する必要がある。脱油液としては、繊維を実質的
に溶解もしくは膨潤させないものでかつ油剤成分を溶解
するものであれば任意であるが、例えばポリエステル繊
維に対しては、メタノール、エタノール、シクロヘキサ
ン、ｎ―ヘキサン、石油ベンジン、リグロイン、ジエチ
ルエーテル、アセトン等を用いればよい。When measuring the fiber density by the method of the present invention, if an oil agent is attached to the fiber surface, it is necessary to perform a deoiling treatment in advance. In particular, fibers subjected to high-temperature heat treatment need to be sufficiently deoiled because oil components tend to remain. The deoiling liquid is not particularly limited as long as it does not substantially dissolve or swell the fibers and dissolves the oil component.For example, for polyester fibers, methanol, ethanol, cyclohexane, n-hexane, Petroleum benzine, ligroin, diethyl ether, acetone and the like may be used.
【００１３】また試料繊維を測定液中に投入するに際し
ては、繊維表面に空気が付着しないように入れることが
大切で、密度勾配管調製に使用したと同一の低密度液に
あらかじめ浸漬し、次いで脱泡処理した後、静かに入れ
ることが望ましい。脱泡処理方法としては、低密度液中
に浸漬した状態で減圧処理するか、遠心分離処理する等
の公知の方法を採用すればよい。かくすることにより、
試料が液の中で平衡位置に達するまでの時間が短縮さ
れ、密度測定値の誤差も小さくなる。When the sample fiber is injected into the measuring solution, it is important to prevent air from adhering to the surface of the fiber. The sample fiber is immersed in advance in the same low-density liquid used for preparing the density gradient tube. After the defoaming treatment, it is desirable to put in gently. As a defoaming treatment method, a known method such as a reduced pressure treatment in a state of being immersed in a low density liquid or a centrifugal separation treatment may be adopted. By doing so,
The time it takes for the sample to reach the equilibrium position in the liquid is reduced, and the error in the density measurement is reduced.
【００１４】本発明が対象とする繊維は、密度が１．０
ｇ／ｃｍ3 を超え、金属塩水溶液の飽和水溶液の密度未
満であれば、化学繊維、天然繊維いずれでもよい。例え
ば天然繊維としては、綿、亜麻、苧麻、黄麻、羊毛、絹
等をあげることができ、化学繊維としては、レーヨン、
キュプラ、アセテート等の半合成繊維、並びにナイロン
６、ナイロン６．６などのポリアミド繊維、ポリフェニ
レンテレフタルアミド、ポリ―ｍ―フェニレンイソフタ
ルアミド、ポリ（ｐ―フェニレン／３，４′―ジフェニ
ルエーテル）テレフタルアミド等のアラミド繊維、ポリ
エチレンテレフタレート、ポリブチレンテレフタレー
ト、ポリエチレンナフタレート等のポリエステル繊維、
その他アクリル繊維、フェノール系繊維、ポリ塩化ビニ
ル繊維、ビニロン等の合成繊維をあげることができる。The fibers targeted by the present invention have a density of 1.0.
Any chemical fiber or natural fiber may be used as long as it exceeds g / cm 3 and is less than the density of the saturated aqueous solution of the metal salt aqueous solution. For example, natural fibers include cotton, flax, ramie, jute, wool, silk, and the like. Chemical fibers include rayon,
Semi-synthetic fibers such as cupra and acetate, polyamide fibers such as nylon 6, nylon 6.6, polyphenylene terephthalamide, poly-m-phenylene isophthalamide, poly (p-phenylene / 3,4'-diphenyl ether) terephthalamide, etc. Aramid fibers, polyester fibers such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate,
Other examples include synthetic fibers such as acrylic fibers, phenolic fibers, polyvinyl chloride fibers, and vinylon.
【００１５】[0015]
【作用】金属塩化合物／水系からなる密度勾配管を用い
て繊維の密度を測定しようとした場合、その詳細な理由
は未だ不明であるが、脱泡処理した試料繊維を用いて
も、測定中繊維表面に細かい気泡が生成付着して、正確
な繊維密度を測定することができなくなる。これに対し
て本発明の方法によれば、密度測定液中に界面活性剤を
添加しているため、何らかの理由（密度勾配管作成時に
空気の溶解が過飽和となるためと推定される）で測定中
繊維表面に気泡が生成付着しても、容易に脱離して早く
試料は沈降平衡位置に達するので、迅速に正確な密度値
を得ることが可能となる。[Function] When the density of a fiber is measured using a density gradient tube composed of a metal salt compound / water system, the detailed reason is still unknown. Fine bubbles are generated and adhered to the fiber surface, and it becomes impossible to accurately measure the fiber density. On the other hand, according to the method of the present invention, since the surfactant is added to the density measurement liquid, the measurement is performed for some reason (it is presumed that the dissolution of air becomes supersaturated when the density gradient tube is formed). Even if bubbles are formed and adhere to the surface of the medium fiber, the sample easily desorbs and quickly reaches the sedimentation equilibrium position, so that an accurate density value can be obtained quickly.
【００１６】[0016]
【実施例】以下実施例をあげて具体的に説明する。なお
実施例中変動率（Ｖ）は、サンプル数５から平均値Ｘと
標準偏差（σ）を求め、Ｖ＝（σ／Ｘ）×１００（％）
で算出した。The present invention will be specifically described below with reference to examples. Note that the variation rate (V) in the example is obtained by calculating the average value X and the standard deviation (σ) from the number of samples 5, and V = (σ / X) × 100 (%)
Was calculated.
【００１７】[0017]
【実施例１】試薬特級の硝酸カルシウム・四水和物［Ｃ
ａ（ＮＯ3 ）2 ・４Ｈ2 Ｏ］を水に溶解して密度約１．
５１５ｇ／ｃｍ3 の高密度液と１．３０１ｇ／ｃｍ3 の
低密度液を作成した。それぞれの水溶液に、界面活性剤
ポリオキシエチレンラウリルエーテル（商品名「スコア
ロール１００」、花王（株）製）を０．１重量％の割合
で加えた後、常法（ＪＩＳ Ｌ１０１３ ７．１４．２
「密度勾配管法」参照）にしたがって、密度勾配管を調
製した。この密度勾配管を２５±０．１℃に調整された
恒温槽に浸漬し、２４時間放置した後、標準フロートで
密度を確認したところ、密度１．３１０〜１．５１０ｇ
／ｃｍ3 の連続した勾配を示していた。Example 1 Special grade calcium nitrate tetrahydrate [C
a (NO 3 ) 2 .4H 2 O] is dissolved in water to obtain a density of about 1.
A high density liquid of 515 g / cm 3 and a low density liquid of 1.301 g / cm 3 were prepared. After adding a surfactant polyoxyethylene lauryl ether (trade name “Score Roll 100”, manufactured by Kao Corporation) at a ratio of 0.1% by weight to each aqueous solution, a conventional method (JIS L1013 7.14. 2
The density gradient tube was prepared according to the “density gradient tube method”). This density gradient tube was immersed in a thermostat adjusted to 25 ± 0.1 ° C. and left for 24 hours. After checking the density with a standard float, the density was 1.310 to 1.510 g.
/ Cm 3 showed a continuous gradient.
【００１８】試料繊維として、単糸繊度２．１デニール
の衣料用ポリエチレンテレフタレート約０．１ｇをシク
ロヘキサン中で約１時間攪拌脱油した後、ドラフト内で
風乾した。この試料繊維を直径約３ｍｍの輪状に結び、
上で調製したと同じ、界面活性剤を含有する低密度液５
〜６ｍｌ中に浸漬し、遠心分離器で３，０００回／ｍｉ
ｎの回転数で３分間脱泡処理した。次いでこの試料をピ
ンセットで取り出し、上記密度勾配管中へ静かに入れ、
２４時間放置後の試料の沈降深さから、あらかじめ標準
フロートで作成した補正曲線を用いて密度を算出した。
試料数（ｎ）５個の密度平均値（Ｘ）は１．３７３ｇ／
ｃｍ3 、変動率（Ｖ）は０．００７３％であった。As a sample fiber, about 0.1 g of polyethylene terephthalate for clothing having a single yarn fineness of 2.1 denier was deoiled in cyclohexane for about 1 hour, and then air-dried in a fume hood. This sample fiber is tied into a ring with a diameter of about 3 mm,
Low-density liquid 5 containing the same surfactant as prepared above
６6 ml and 3,000 times / mi in a centrifuge
A defoaming treatment was performed at a rotation speed of n for 3 minutes. The sample was then removed with forceps and gently placed into the density gradient tube,
From the sedimentation depth of the sample after standing for 24 hours, the density was calculated using a correction curve prepared in advance with a standard float.
The average density (X) of the five samples (n) was 1.373 g /
cm 3 and the variation rate (V) were 0.0073%.
【００１９】同一試料繊維を、ＪＩＳ Ｌ１０１３の方
法に準拠して２５±０．１℃の恒温槽中に保たれた四塩
化炭素―ｎ―ヘプタン密度勾配管を用いて測定した密度
平均値（Ｘ）は１．３７３ｇ／ｃｍ3 、変動率（Ｖ）は
０．００７３％（以下ＪＩＳ法と略記する）であり、上
記測定値とよく一致した。The average fiber density (X) of the same sample fiber measured using a carbon tetrachloride-n-heptane density gradient tube kept in a thermostat at 25 ± 0.1 ° C. according to the method of JIS L1013. ) Is 1.373 g / cm 3 , and the fluctuation rate (V) is 0.0073% (hereinafter abbreviated as JIS method), which is in good agreement with the above measured values.
【００２０】[0020]
【比較例１】実施例１において、界面活性剤ポリオキシ
エチレンラウリルエーテルを使わない以外はすべて同様
に操作して試料繊維の密度測定を行なった。２４時間後
の密度平均値は１．３７０ｇ／ｃｍ3 、変動率（Ｖ）は
０．４４１％と測定値は不正確であるばかりでなく、測
定データのばらつきも大きすぎて実用に供せるものでは
なかった。Comparative Example 1 The density of the sample fiber was measured in the same manner as in Example 1, except that the surfactant polyoxyethylene lauryl ether was not used. The density average value after 24 hours is 1.370 g / cm 3 , and the fluctuation rate (V) is 0.441%. The measured value is not only inaccurate, but also the variation of the measured data is too large to be put to practical use. Was not.
【００２１】[0021]
【実施例２】試料繊維として単糸繊度４．０デニールの
工業用ポリエチレンテレフタレート糸約０．１ｇを用
い、界面活性剤の添加量を変更する以外は実施例１と同
様にして密度を求めた。結果を表１に示す。Example 2 Approximately 0.1 g of industrial polyethylene terephthalate yarn having a single fiber fineness of 4.0 denier was used as a sample fiber, and the density was determined in the same manner as in Example 1 except that the amount of the surfactant was changed. . Table 1 shows the results.
【００２２】[0022]
【表１】 [Table 1]
【００２３】[0023]
【実施例３】実施例１において、界面活性剤としてポリ
オキシエチレンラウリルエーテルに代えて表２記載のも
のを０．２ｗｔ％用いる以外は実施例１と同様に行なっ
た。結果は表２に示す。表２から明らかなように、硝酸
カルシウムを用いる場合、アニオン系界面活性剤である
ドデシルベンゼンスルホン酸ナトリウムは、水不溶性沈
殿物を形成するため、密度測定はできなかった。Example 3 Example 1 was repeated except that 0.2 wt% of the surfactant shown in Table 2 was used instead of polyoxyethylene lauryl ether. The results are shown in Table 2. As is clear from Table 2, when calcium nitrate was used, the density could not be measured because sodium dodecylbenzenesulfonate, an anionic surfactant, formed a water-insoluble precipitate.
【００２４】[0024]
【表２】 [Table 2]
【００２５】[0025]
【実施例４】金属塩化合物及び界面活性剤として表３記
載のものを用い、表３記載の高密度液・低密度液を調製
し、以下実施例１と同様に行なった。なお界面活性剤の
含有量は０．０５ｗｔ％とし、試料繊維としては、表３
記載のものを用いた。得られた結果及びＪＩＳ法により
測定したこれらの繊維密度を表３に合わせて示す。Example 4 High-density liquids and low-density liquids shown in Table 3 were prepared using the metal salt compounds and surfactants shown in Table 3, and the same procedures as in Example 1 were carried out. The content of the surfactant was 0.05 wt%, and the sample fibers were as shown in Table 3.
The one described was used. The results obtained and the fiber densities measured by the JIS method are shown in Table 3.
【００２６】[0026]
【表３】 [Table 3]
【００２７】[0027]
【実施例５】実施例１において、界面活性剤としてポリ
オキシエチレンノニルフェノールエーテル（花王（株）
製 スコアロール９００）を０．１重量％添加する以外
は実施例１と同様にして密度勾配管を調製した。Example 5 In Example 1, a polyoxyethylene nonylphenol ether (Kao Corporation) was used as a surfactant.
A density gradient tube was prepared in the same manner as in Example 1, except that 0.1% by weight of a score roll 900) was added.
【００２８】この密度勾配管を用い、脱油液としてメタ
ノールを用いて処理した各種繊維を実施例１と同様に測
定した。結果はＪＩＳ法により測定した結果を合わせて
表４に示す。Using this density gradient tube, various fibers treated with methanol as a deoiling liquid were measured in the same manner as in Example 1. The results are shown in Table 4 together with the results measured by the JIS method.
【００２９】[0029]
【表４】 [Table 4]
【００３０】[0030]
【発明の効果】本発明の測定方法によれば、環境問題の
ある四塩化炭素を使用せずとも繊維の密度を測定するこ
とが可能になった。さらには用いる測定液が水溶液であ
るため、有機溶媒系の現行法より取扱いが容易であるば
かりでなく、試用後の金属塩化合物水溶液は濃度調整す
るだけで繰返し使用が可能となるため、省資源省エネル
ギーにもなるといった利点を有する。According to the measuring method of the present invention, it is possible to measure the fiber density without using carbon tetrachloride which has environmental problems. Furthermore, since the measuring solution used is an aqueous solution, it is not only easier to handle than the current method using an organic solvent, but the metal salt compound aqueous solution after trial can be used repeatedly only by adjusting the concentration, thus saving resources and energy. It has the advantage of becoming
Claims (3)
用い密度勾配管法により繊維の密度を測定するに際し、
前記金属塩化合物とは実質的に非反応性の界面活性剤を
０．０１〜３．０重量％含有する密度測定液を用いるこ
とを特徴とする繊維の密度測定方法。When measuring the density of a fiber by a density gradient tube method using an aqueous solution of a metal salt compound as a density measuring solution,
A method for measuring fiber density, characterized by using a density measurement liquid containing 0.01 to 3.0% by weight of a surfactant which is substantially non-reactive with the metal salt compound.
求項１記載の繊維の密度測定方法。2. The method according to claim 1, wherein the metal salt compound is calcium nitrate.
る請求項１又は２記載の繊維の密度測定方法。3. The method for measuring fiber density according to claim 1, wherein the surfactant is a nonionic surfactant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23484993A JP2781330B2 (en) | 1993-09-21 | 1993-09-21 | Fiber density measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23484993A JP2781330B2 (en) | 1993-09-21 | 1993-09-21 | Fiber density measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0792072A JPH0792072A (en) | 1995-04-07 |
| JP2781330B2 true JP2781330B2 (en) | 1998-07-30 |
Family
ID=16977324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23484993A Expired - Fee Related JP2781330B2 (en) | 1993-09-21 | 1993-09-21 | Fiber density measurement method |
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| Country | Link |
|---|---|
| JP (1) | JP2781330B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596887A (en) * | 2015-02-02 | 2015-05-06 | 东华大学 | Fiber density testing method |
| CN105842115B (en) * | 2016-03-29 | 2019-03-29 | 绍兴文理学院元培学院 | A kind of new fiber density measurement method |
| CN105842109B (en) * | 2016-03-29 | 2019-03-29 | 绍兴文理学院元培学院 | A kind of novel two-component textile fabric component ratio test method |
| CN106153497B (en) * | 2016-09-09 | 2020-06-26 | 天津工业大学 | Cellulose fiber density determination method |
| CN112504911A (en) * | 2020-11-05 | 2021-03-16 | 金发科技股份有限公司 | Method for testing density of high polymer material |
| CN112557258B (en) * | 2020-11-23 | 2022-12-02 | 金发科技股份有限公司 | Solution for testing density of high polymer material and application thereof |
-
1993
- 1993-09-21 JP JP23484993A patent/JP2781330B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0792072A (en) | 1995-04-07 |
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