JP3672233B2 - Soft bleaching method of cellulosic fiber knitted fabric by batch processing - Google Patents
Soft bleaching method of cellulosic fiber knitted fabric by batch processing Download PDFInfo
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- JP3672233B2 JP3672233B2 JP2000172861A JP2000172861A JP3672233B2 JP 3672233 B2 JP3672233 B2 JP 3672233B2 JP 2000172861 A JP2000172861 A JP 2000172861A JP 2000172861 A JP2000172861 A JP 2000172861A JP 3672233 B2 JP3672233 B2 JP 3672233B2
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- bleaching
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- cellulosic fiber
- knitted fabric
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- 238000004061 bleaching Methods 0.000 title claims description 42
- 239000004744 fabric Substances 0.000 title claims description 25
- 238000000034 method Methods 0.000 title claims description 13
- 239000000835 fiber Substances 0.000 title claims description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 18
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 claims description 13
- 229960002218 sodium chlorite Drugs 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000007654 immersion Methods 0.000 claims description 3
- 238000010923 batch production Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010924 continuous production Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 229920000742 Cotton Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000002270 dispersing agent Substances 0.000 description 3
- 239000013522 chelant Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000011437 continuous method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Landscapes
- Treatment Of Fiber Materials (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、白度とソフト性とを兼ね備えたバッチ処理によるセルロース系繊維編生地のソフト漂白法に関する。
【０００２】
【従来の技術】
セルロース系繊維編生地の漂白においては、亜塩素酸ナトリウムや過酸化水素等による方法が一般的であるが、白度を高めようとすると風合いが硬くなってしまったり、逆にソフト性を重視すると白度が低下してしまうといった問題があった。
【０００３】
また、近年効率的な生産のために生地を高速で搬送しながら漂白等の処理を連続的に行う連続生産方式が広く採用されてきている。しかしながら、この連続生産方式は大量生産には適しているものの、多種少量生産には不向きであったり、更に生地には余計なテンション等の物理的な力が加わってしまうため、生地が傷む、歪む、伸びる等の事象が起こり、生地の物性、特に風合いに悪影響を与えるといった問題があった。
【０００４】
更に、ソフト性を向上させるため、漂白後の生地に柔軟剤による処理を施し、ソフト性を付与する手段もあるが、洗濯耐久性に乏しく、洗濯することによって容易にその効果が消失してしまう。
【０００５】
【発明が解決しようとする課題】
本発明は、上述の問題を解決するためになされたもので、その目的とするところは、白度とソフト性とを兼ね備え、かつ連続生産方式で発生する生地の傷み、歪み、伸び等の不具合による風合い等を改善したものであり、特に多種少量生産に適したバッチ処理によるセルロース系繊維編生地のソフト漂白法を提供するものである。
【０００６】
【課題を解決するための手段】
即ち、本発明のソフト漂白法は、濃度５〜１００ｇ／ｌ、pH＝３〜４．５の亜塩素酸ナトリウム液に浸漬後、７０〜１００℃で３０〜１２０分間加熱処理する第１バッチ処理と、濃度５〜５０ｇ／ｌ、pH＝１０〜１１の過酸化水素液に浸漬後、４０〜７０℃で１０〜６０分間加熱処理する第２バッチ処理とからなることに特徴を有する。また、第１バッチ処理の亜塩素酸ナトリウム液による漂白処理時間の方が、第２バッチ処理の過酸化水素液による漂白処理時間よりも、漂白時間比率の割合が高いことに特徴を有する。更に、第１バッチ処理の亜塩素酸ナトリウム液による漂白処理温度の方が、第２バッチ処理の過酸化水素液による漂白処理温度よりも、高いことに特徴を有する。
【０００７】
【発明の実施の形態】
本発明のソフト漂白法は、第１バッチ処理の亜塩素酸ナトリウム液による漂白と第２バッチ処理の過酸化水素液による漂白はどちらも非連続的な処理であり、容器内に生地を投入し、生地を動かさず固定したまま処理液を循環させることにより処理液を接触させ、漂白処理を行うものである。このため、連続生産方式に比べ、生地には余計な力が加わることなく漂白処理され、生地物性、特に風合いのソフト化をより向上することができる。
【０００８】
本発明のソフト漂白法において、第１バッチ処理の亜塩素酸ナトリウム液による漂白は、処理液の濃度５〜１００ｇ／ｌ、pH＝３〜４．５が好ましく、生地を該処理液に浸漬後、７０〜１００℃で３０〜１２０分間加熱処理するのが好ましい。漂白処理温度が７０℃未満であると、１２０分間処理しても所定の白度を得ることが困難であり、また１００℃を越えると密閉化された高圧設備を要し、設備的にも操作的にも好ましくない。また、漂白処理時間が３０分未満であると、反応が不充分であり、所定の白度を得ることが困難で、１２０分を越えると白度が平衡に達し、生地が脆化して硬化する問題を生ずるので好ましくない。
【０００９】
なお、第１バッチ処理において、処理液中にポリカルボン酸系化合物等のキレート分散剤を併用すると、金属イオンによる過激反応を抑制することができ、更にその効果を助長できる。
【００１０】
一方、第２バッチ処理の過酸化水素液による漂白は、処理液の濃度５〜５０ｇ／ｌ、pH＝１０〜１１が好ましく、生地を該処理液に浸漬後、４０〜７０℃で１０〜６０分間加熱処理するのが好ましい。この第２バッチ処理の過酸化水素液による漂白は、低温で行うことによりアルカリによる綿ワックスの分解と過酸化水素による綿の脆化を極力抑え、残留色素の除去や前工程の第１バッチ処理における亜塩素酸ナトリウムの残留分の中和に効果がある。ただし、漂白処理温度が４０℃未満であると、漂白反応が進みにくく、十分な白度が得られず、また７０℃を越えると、白度は得られるものの温度の上昇につれ加速度的に生地の脆化を招くので好ましくない。また、漂白処理時間が１０分未満であると、反応が不充分に終わり、薬剤の有効利用が図れず、６０分を越えると白度の上昇は僅かであるのに生地の脆化が優先的に進み問題がある。
【００１１】
なお、第２バッチ処理において、処理液中にポリカルボン酸系化合物等のキレート分散剤を併用すると、金属イオンによる過激反応を抑制することができ、更にその効果を助長できる。
【００１２】
一般に過酸化水素液による漂白は、白度の向上には有効であるものの、生地へのダメージが大きく、風合いが硬くなってしまう。そのため、本発明では、生地へのダメージが小さい亜塩素酸ナトリウム液による漂白処理時間の方を、過酸化水素液による漂白処理時間よりも高めることが好ましい。また、同様の理由により、生地へのダメージが小さい亜塩素酸ナトリウム液による漂白処理温度の方を、過酸化水素液による漂白処理温度よりも高めることが好ましい。
【００１３】
【実施例】
以下、実施例を挙げて更に詳細に説明する。なお、以下の各実施例は本発明を限定するものではない。
【００１４】
（実施例１）
実施例１として、表１に示す条件で漂白処理を行った。
【００１５】
【表１】
（実施例２）
実施例２として、表２に示す条件で漂白処理を行った。
【００１７】
【表２】
（比較例１）
比較例１として、表３に示す条件で漂白処理を行った。
【００１９】
【表３】
なお、実施例１、２における処理は以下により行った。
使用生地：コットンフライス生地
第１バッチ処理：亜塩素酸ナトリウムの濃度２５％液
浴比 １：４
第２バッチ処理：過酸化水素の濃度３５％液
浴比 １：４
キレート分散剤
Ａ：ポリカルボン酸系
Ｂ：マグネシウム塩系
Ｃ：ホスホン酸系
また、第１バッチ処理及び第２バッチ処理の後にはそれぞれ湯洗、水洗処理を行った。
【００２１】
比較例１における処理は、同様のコットンフライス生地を用い、従来法の連続方式により、絞り率１５０％、スチーム処理にて行った。
【００２２】
実施例１、２及び比較例１により得られた処理後の生地を評価した結果を表４に示す。
【００２３】
【表４】
なお、白度及びソフト性の評価については、以下のとおり行った。
白度：ＣＩＥＬＡＢ色空間よりＬ＊−３ｂ＊として算出（Ｍａｃｂｅｔｈ ２０２０微小面積にて測色）
ソフト性：測色試料をミシンで空縫い（針：ＯＲＧＡＮ ＤＢ×１ １１号）し、あいた穴の数を次式に代入してソフト性を評価する数値とした。
【００２５】
【数１】
ただし、比較例１のソフト性を１００として算出した。なお、ソフト性を評価する数値は、大きい方がよいことを表している。
【００２７】
【発明の効果】
以上のように本発明によれば、白度とソフト性とを兼ね備え、かつ連続生産方式で発生する生地の傷み、歪み、伸び等の不具合による風合い等を改善でき、これにより得られた漂白物は特に肌着として好適である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for soft bleaching a cellulosic fiber knitted fabric by batch processing having both whiteness and softness.
[0002]
[Prior art]
For bleaching cellulosic fiber knitted fabrics, methods using sodium chlorite or hydrogen peroxide are common, but if you try to increase whiteness, the texture will become harder, or conversely if softness is emphasized There was a problem that the whiteness decreased.
[0003]
In recent years, a continuous production system in which bleaching or the like is continuously carried out while conveying a dough at a high speed has been widely adopted for efficient production. However, although this continuous production method is suitable for mass production, it is unsuitable for various kinds of small-scale production, and further, physical force such as extra tension is applied to the fabric, so the fabric is damaged or distorted. There was a problem that an event such as elongation occurred and the physical properties of the fabric, particularly the texture, were adversely affected.
[0004]
Furthermore, in order to improve the softness, there is a means to give the softness by treating the bleached fabric with a softening agent, but the washing durability is poor and the effect is easily lost by washing. .
[0005]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-mentioned problems, and the purpose thereof is to combine whiteness and softness, and troubles such as damage, distortion, and elongation of the fabric that occur in a continuous production system. It provides a soft bleaching method for cellulosic fiber knitted fabrics by batch processing particularly suitable for various small-scale production.
[0006]
[Means for Solving the Problems]
That is, the soft bleaching method of the present invention is a first batch process in which a heat treatment is performed at 70 to 100 ° C. for 30 to 120 minutes after immersion in a sodium chlorite solution having a concentration of 5 to 100 g / l and pH = 3 to 4.5. And a second batch treatment in which a heat treatment is performed at 40 to 70 ° C. for 10 to 60 minutes after immersion in a hydrogen peroxide solution having a concentration of 5 to 50 g / l and pH = 10 to 11. In addition, the bleaching time with the sodium chlorite solution in the first batch treatment is characterized in that the ratio of the bleaching time ratio is higher than the bleaching time with the hydrogen peroxide solution in the second batch treatment. Furthermore, the bleaching treatment temperature with the sodium chlorite solution in the first batch treatment is higher than the bleaching treatment temperature with the hydrogen peroxide solution in the second batch treatment.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
In the soft bleaching method of the present invention, the bleaching with the sodium chlorite solution in the first batch processing and the bleaching with the hydrogen peroxide solution in the second batch processing are both discontinuous processing, and the dough is put into a container. The bleaching treatment is performed by bringing the treatment liquid into contact by circulating the treatment liquid while the dough is fixed without moving. For this reason, as compared with the continuous production method, the fabric is bleached without applying extra force, and the physical properties of the fabric, particularly the softening of the texture, can be further improved.
[0008]
In the soft bleaching method of the present invention, bleaching with the sodium chlorite solution in the first batch treatment is preferably a treatment solution concentration of 5 to 100 g / l, pH = 3 to 4.5, and after the dough is immersed in the treatment solution The heat treatment is preferably performed at 70 to 100 ° C. for 30 to 120 minutes. If the bleaching temperature is less than 70 ° C, it is difficult to obtain a predetermined whiteness even if it is treated for 120 minutes. This is also not preferable. If the bleaching time is less than 30 minutes, the reaction is insufficient, and it is difficult to obtain a predetermined whiteness. If the bleaching time exceeds 120 minutes, the whiteness reaches equilibrium, and the fabric becomes brittle and hardens. This causes problems and is not preferable.
[0009]
In the first batch treatment, when a chelating dispersant such as a polycarboxylic acid compound is used in the treatment liquid, an extreme reaction due to metal ions can be suppressed, and the effect can be further promoted.
[0010]
On the other hand, the bleaching with the hydrogen peroxide solution in the second batch treatment is preferably a treatment solution concentration of 5 to 50 g / l and pH = 10 to 11, and after the dough is immersed in the treatment solution, it is 10 to 60 at 40 to 70 ° C. It is preferable to heat-treat for a minute. The bleaching with the hydrogen peroxide solution in the second batch treatment is performed at a low temperature to suppress the decomposition of the cotton wax by alkali and the embrittlement of the cotton by hydrogen peroxide as much as possible. Is effective in neutralizing the residual sodium chlorite. However, if the bleaching temperature is less than 40 ° C, the bleaching reaction is difficult to proceed and sufficient whiteness cannot be obtained, and if it exceeds 70 ° C, whiteness is obtained, but as the temperature rises, the fabric is accelerated. This is not preferable because it causes embrittlement. If the bleaching time is less than 10 minutes, the reaction will be insufficient and the drug cannot be effectively used. If the bleaching time exceeds 60 minutes, the whiteness is only slightly increased but the embrittlement of the fabric is preferential. Go to and have a problem.
[0011]
In the second batch treatment, when a chelate dispersant such as a polycarboxylic acid compound is used in the treatment liquid, an extreme reaction due to metal ions can be suppressed, and the effect can be further promoted.
[0012]
In general, bleaching with a hydrogen peroxide solution is effective in improving whiteness, but the damage to the fabric is large and the texture becomes hard. Therefore, in the present invention, it is preferable to increase the bleaching time with the sodium chlorite solution that causes less damage to the fabric than the bleaching time with the hydrogen peroxide solution. For the same reason, it is preferable to increase the bleaching temperature with a sodium chlorite solution that causes less damage to the fabric than the bleaching temperature with a hydrogen peroxide solution.
[0013]
【Example】
Hereinafter, an example is given and it demonstrates in detail. In addition, each following Example does not limit this invention.
[0014]
(Example 1)
As Example 1, bleaching was performed under the conditions shown in Table 1.
[0015]
[Table 1]
(Example 2)
As Example 2, bleaching was performed under the conditions shown in Table 2.
[0017]
[Table 2]
(Comparative Example 1)
As Comparative Example 1, bleaching was performed under the conditions shown in Table 3.
[0019]
[Table 3]
The processing in Examples 1 and 2 was performed as follows.
Fabric used: Cotton milling fabric 1st batch treatment: Sodium chlorite concentration 25% solution bath ratio 1: 4
Second batch treatment: hydrogen peroxide concentration 35% liquid bath ratio 1: 4
Chelate dispersant A: polycarboxylic acid system B: magnesium salt system C: phosphonic acid system Further, after the first batch treatment and the second batch treatment, washing with hot water and washing with water were performed, respectively.
[0021]
The treatment in Comparative Example 1 was performed using the same cotton milling cloth and steaming with a drawing rate of 150% by a conventional continuous method.
[0022]
Table 4 shows the results of evaluating the treated fabrics obtained in Examples 1 and 2 and Comparative Example 1.
[0023]
[Table 4]
The whiteness and softness were evaluated as follows.
Whiteness: Calculated as L * -3b * from CIELAB color space (measured in Macbeth 2020 micro area)
Softness: The colorimetric sample was sewed with a sewing machine (needle: ORGAN DB × 1111), and the number of opened holes was substituted into the following formula to evaluate the softness.
[0025]
[Expression 1]
However, the softness of Comparative Example 1 was calculated as 100. In addition, the numerical value which evaluates soft property represents that the larger one is better.
[0027]
【The invention's effect】
As described above, according to the present invention, the bleached product obtained by combining the whiteness and the softness and improving the texture due to defects such as scratches, distortions and elongation of the fabric generated in the continuous production method. Is particularly suitable for underwear.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000172861A JP3672233B2 (en) | 2000-06-09 | 2000-06-09 | Soft bleaching method of cellulosic fiber knitted fabric by batch processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000172861A JP3672233B2 (en) | 2000-06-09 | 2000-06-09 | Soft bleaching method of cellulosic fiber knitted fabric by batch processing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001355181A JP2001355181A (en) | 2001-12-26 |
| JP3672233B2 true JP3672233B2 (en) | 2005-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000172861A Expired - Fee Related JP3672233B2 (en) | 2000-06-09 | 2000-06-09 | Soft bleaching method of cellulosic fiber knitted fabric by batch processing |
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| Country | Link |
|---|---|
| JP (1) | JP3672233B2 (en) |
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| Publication number | Publication date |
|---|---|
| JP2001355181A (en) | 2001-12-26 |
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