JP3776949B2 - GLA-containing rayon fiber and method for producing the same - Google Patents
GLA-containing rayon fiber and method for producing the same Download PDFInfo
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- JP3776949B2 JP3776949B2 JP16456895A JP16456895A JP3776949B2 JP 3776949 B2 JP3776949 B2 JP 3776949B2 JP 16456895 A JP16456895 A JP 16456895A JP 16456895 A JP16456895 A JP 16456895A JP 3776949 B2 JP3776949 B2 JP 3776949B2
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- gla
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Description
【0001】
【産業上の利用分野】
本発明は、γ−リノレン酸(以下、GLAと略称する。)を含有したレーヨン繊維及びその製造法に関する。
GLAは、血管拡張、降圧作用、血小板凝集抑制作用の他、アレルギー症状、特にアトピー性皮膚炎等の改善の作用を有していると言われている高度不飽和脂肪酸の一種である。
【0002】
【従来の技術】
従来、種々の化合物を含有させたレーヨン等の再生セルロース繊維が公知であり、例えば無機化合物を含有させたものとして、活性炭(例えば、特開平1−256545号公報、同3−79601号公報、等)、金属類(例えば、特開平2−307906号公報、同2−307952号公報、同3−199407号公報、同4−146207号公報、同5−49682号公報、同5−86501号公報、等)等、あるいは有機化合物を含有させたものとして、キトサン(例えば、特開平1−157046号公報、同4ー185757号公報、同4−289211号公報、同5−186945号公報、等)、有機硫黄窒素系化合物(例えば、特開平3−104913号公報、等)、4級アンモニウム塩等の抗菌剤(例えば、特開平3−227403号公報、同4−257309号公報、同5−339811号公報、等)等が報告されている。
しかしながら、これらはいずれも酸・アルカリ、特にアルカリに対して安定な化合物であり、アルカリに対して不安定な高度不飽和脂肪酸を含有させた報告はない。
【0003】
【発明が解決しようとする課題】
本発明は、酸・アルカリ、特にアルカリに対しては変化しやすく、酸化分解をおこしやすい、高度不飽和脂肪酸の一種であるGLAを含有したレーヨン繊維、およびその製造法を提供することを課題とする。
【0004】
【課題を解決するための手段】
本発明者らは、かかる課題を解決すべく鋭意研究の結果、GLAを乳化液(エマルジョン)としその耐アルカリ性を検討したところ、短時間では安定であるが時間が長くなると不安定であること、GLA乳化液を紡糸直前にビスコースに添加・混和し、紡糸浴で凝固再生することにより、特にインジェクション方式で添加することにより、非常にアリカリ性の強いビスコースであるにもかかわらず、GLAがほとんど変化することなく、効率よくレーヨン繊維に含有されることを見いだし、本発明を完成するに至った。すなわち本発明は、GLAを0.3〜5%内添したレーヨン繊維及びその製造法を提供するものである。
【0005】
本発明において、GLAは乳化液としてビスコースに添加される。GLAは、いずれのものでも使用でき、例えば、発酵法により生産されたもの等を例示することができる。GLA乳化液は、GLAあるいはGLA含有オイルを脱塩水に加え、次いで乳化剤を添加し攪拌することにより製造することができる。使用できる乳化剤としては、ポリオキシエチレンアルキルエーテル、高級アルキルポリグリコール誘導体、高級アルコール硫酸エステル塩、アルキルベンゼンスルホン酸、高級アルコールサルフェート塩、アルギン酸ナトリウム、カゼインナトリウム、ソルビットの高級脂肪酸エステル、脂肪酸モノグリセリド、プロピレングリコール脂肪酸エステル等を例示することができるが、中でもポリオキシエチレンアルキルエーテル、例えばノニポール120(三洋化成(株)製)等が好ましい。また、乳化液を製造する場合、GLAの酸化を防止する目的で、不活性ガス、例えば窒素ガス等で置換したり、酸化防止剤を添加することが望ましい。
【0006】
GLA乳化液は紡糸直前のビスコースに添加・混合され、紡糸される。ビスコース、紡糸条件等は、通常のセルロース再生繊維の製造条件が適用される。GLA乳化液は、紡糸直前、好ましくは10分以内に添加することが好ましく、添加方法はいずれの方法でもよいが、インジェクション方式による添加が、GLAの分解を防ぐために、特に好ましい。GLAの添加量は0.3〜5%である。5%を越えて添加すると、繊維物性が低下する。
【0007】
【実施例】
以下実施例を挙げて、本発明を詳細に説明する。
参考例
攪拌機付きの密閉ステンレスタンクに、発酵法により生産されたGLA含有オイル(GLA含量25重量%)40重量部、脱塩水40重量部、ノニポール120(三洋化成(株)製)20重量部及び3,5−ジ−t−ブチルヒドロキシトルエン0.5重量部を添加し、攪拌混合することにより、GLA乳化液(エマルジョン)を得た。該乳化液のGLA含量は約10重量%である。
【0008】
実施例
セルロース濃度8.91%、アルカリ濃度5.7%、粘度48秒(落球法)及び熟成度9.2のビスコースに、インジェクションを用い、GLA量がセルロースに対して1重量%となるよう、参考例で製造したGLA乳化液を注入しつつミキサーにて連続混合し、硫酸112g/l、硫酸ナトリウム330g/l、硫酸亜鉛13.5g/lからなる温度45℃の第1浴に40m/minで紡糸し、次いで硫酸60g/lからなる温度90℃の第二浴を、ドラフト率50%で通すことにより、凝固再生したレーヨントウを得た。次いでこれを、レーヨンの一般的な製造法により、カット、捲縮、精練、乾燥し、ステーブルレーヨンを得た。
得られた繊維中のGLA含量は、6.8mg/gであり、添加したGLAの3分の2以上がレーヨン繊維中に含有されていることがわかる。
なお、GLA量は、以下の方法により分析した。
水分既知の試料約1gを精秤し、銅アンモニア溶液100gを加え30分間攪拌した。次いでクロロホルム:メタノール(2:1)混液150mlを加え抽出し、更にクロロホルム100mlで2回抽出した。抽出液を合わせ、内部標準物を加えたのち濃縮し、濃縮液にクロロホルムを加え5mlとした。
この溶液をガスクロマトグラフィで分析した。
【0009】
比較例
セルロース濃度8.91%、アルカリ濃度5.7%、粘度48秒(落球法)及び熟成度9.2のビスコースに、GLA量がセルロースに対して1重量%に相当する量を添加し、19℃で攪拌した。この混合ビスコースを減圧(650mmHg)下、1時間放置し、脱泡処理を行った。
以下、実施例と同様に処理することにより、ステープルレーヨンを得た。
得られた繊維中のGLA含量を実施例と同様にして分析したところ、0.1mg/gであり、添加量に対して1%程度であった。
【0010】
【発明の効果】
以上説明してきたように、本発明によると、GLAを含有したレーヨン及びその製造法が提供される。
GLAは、細胞膜を非常にやわらかくする作用があるといわれており、例えば肌着等として使用することにより、皮膚炎、例えばアトピー性皮膚炎等に対する効果が期待される。[0001]
[Industrial application fields]
The present invention relates to a rayon fiber containing γ-linolenic acid (hereinafter abbreviated as GLA) and a method for producing the same.
GLA is a type of polyunsaturated fatty acid that is said to have an action of improving allergic symptoms, particularly atopic dermatitis, in addition to vasodilation, antihypertensive action, and platelet aggregation inhibitory action.
[0002]
[Prior art]
Conventionally, regenerated cellulose fibers such as rayon containing various compounds are known. For example, activated carbon (for example, JP-A-1-256545, JP-A-3-79601, etc.) includes inorganic compounds. ), Metals (for example, JP-A-2-307906, JP-A-2-307852, JP-A-3-199407, JP-A-4-146207, JP-A-5-49682, JP-A-5-86501, Etc.), or those containing an organic compound, such as chitosan (for example, JP-A Nos. 1-157046, 4-185757, 4-289111, 5-186945, etc.), Organic sulfur nitrogen compounds (for example, JP-A-3-104913, etc.), antibacterial agents such as quaternary ammonium salts (for example, JP-A-3-2274) 3 JP, said 4-257309 and JP is the 5-339811 discloses, etc.) or the like reported.
However, these are all compounds that are stable to acids and alkalis, especially alkalis, and there is no report that contains highly unsaturated fatty acids that are unstable to alkalis.
[0003]
[Problems to be solved by the invention]
It is an object of the present invention to provide a rayon fiber containing GLA, which is a kind of highly unsaturated fatty acid, which easily changes to acids and alkalis, particularly alkalis, and easily undergoes oxidative degradation, and a method for producing the same. To do.
[0004]
[Means for Solving the Problems]
As a result of diligent research to solve such problems, the present inventors have studied GLA as an emulsion (emulsion) and its alkali resistance, and are stable in a short time but unstable when the time is long, GLA emulsion is added to and mixed with viscose immediately before spinning, and coagulated and regenerated in a spinning bath, especially by the injection method. It has been found that it is efficiently contained in rayon fibers with little change, and the present invention has been completed. That is, this invention provides the rayon fiber which internally added GLA 0.3 to 5%, and its manufacturing method.
[0005]
In the present invention, GLA is added to the viscose as an emulsion. Any GLA can be used, and examples thereof include those produced by fermentation. The GLA emulsion can be produced by adding GLA or GLA-containing oil to demineralized water, then adding an emulsifier and stirring. Usable emulsifiers include polyoxyethylene alkyl ethers, higher alkyl polyglycol derivatives, higher alcohol sulfate esters, alkylbenzene sulfonic acids, higher alcohol sulfate salts, sodium alginate, sodium caseinate, sorbite higher fatty acid esters, fatty acid monoglycerides, propylene glycol Examples include fatty acid esters, among which polyoxyethylene alkyl ethers such as Nonipol 120 (manufactured by Sanyo Chemical Co., Ltd.) are preferred. In the case of producing an emulsion, it is desirable to replace with an inert gas such as nitrogen gas or to add an antioxidant for the purpose of preventing oxidation of GLA.
[0006]
The GLA emulsion is added to and mixed with the viscose just before spinning and spinning. As the viscose, spinning conditions, etc., the usual conditions for producing cellulose regenerated fiber are applied. The GLA emulsion is preferably added immediately before spinning, preferably within 10 minutes. The addition method may be any method, but the addition by the injection method is particularly preferred in order to prevent the decomposition of GLA. The amount of GLA added is 0.3 to 5% . If the content exceeds 5%, the fiber properties are lowered.
[0007]
【Example】
Hereinafter, the present invention will be described in detail with reference to examples.
Reference Example In a sealed stainless steel tank equipped with a stirrer, 40 parts by weight of GLA-containing oil (GLA content 25% by weight) produced by fermentation, 40 parts by weight of demineralized water, 20 parts by weight of Nonipol 120 (manufactured by Sanyo Chemical Co., Ltd.) A GLA emulsion (emulsion) was obtained by adding 0.5 parts by weight of 3,5-di-t-butylhydroxytoluene and stirring and mixing. The emulsion has a GLA content of about 10% by weight.
[0008]
Example: Viscose having a cellulose concentration of 8.91%, an alkali concentration of 5.7%, a viscosity of 48 seconds (falling ball method) and a maturity of 9.2, and the amount of GLA becomes 1% by weight with respect to cellulose. Thus, the GLA emulsion produced in the Reference Example was continuously mixed with a mixer while being poured into a first bath having a temperature of 45 ° C. composed of 112 g / l of sulfuric acid, 330 g / l of sodium sulfate, and 13.5 g / l of zinc sulfate. Then, a second bath consisting of 60 g / l of sulfuric acid and having a temperature of 90 ° C. was passed at a draft rate of 50% to obtain coagulated and regenerated rayon tow. Next, this was cut, crimped, scoured and dried by a general method for producing rayon to obtain a stable rayon.
The GLA content in the obtained fiber is 6.8 mg / g, and it can be seen that more than two-thirds of the added GLA is contained in the rayon fiber.
The amount of GLA was analyzed by the following method.
About 1 g of a sample having a known moisture content was precisely weighed, 100 g of a copper ammonia solution was added, and the mixture was stirred for 30 minutes. Next, 150 ml of a chloroform: methanol (2: 1) mixture was added for extraction, followed by extraction twice with 100 ml of chloroform. The extracts were combined, concentrated after adding an internal standard, and chloroform was added to the concentrate to make 5 ml.
This solution was analyzed by gas chromatography.
[0009]
Comparative Example Added to the viscose having a cellulose concentration of 8.91%, an alkali concentration of 5.7%, a viscosity of 48 seconds (falling ball method) and a maturity of 9.2, an amount corresponding to 1% by weight of GLA with respect to the cellulose. And stirred at 19 ° C. The mixed viscose was allowed to stand for 1 hour under reduced pressure (650 mmHg) for defoaming treatment.
Hereinafter, staple rayon was obtained by processing in the same manner as in Example.
When the GLA content in the obtained fiber was analyzed in the same manner as in Example, it was 0.1 mg / g, which was about 1% with respect to the added amount.
[0010]
【The invention's effect】
As described above, according to the present invention, a rayon containing GLA and a method for producing the same are provided.
GLA is said to have an action of making the cell membrane very soft. For example, GLA is expected to have an effect on dermatitis such as atopic dermatitis by using it as an underwear.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16456895A JP3776949B2 (en) | 1995-06-08 | 1995-06-08 | GLA-containing rayon fiber and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16456895A JP3776949B2 (en) | 1995-06-08 | 1995-06-08 | GLA-containing rayon fiber and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08337918A JPH08337918A (en) | 1996-12-24 |
| JP3776949B2 true JP3776949B2 (en) | 2006-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16456895A Expired - Fee Related JP3776949B2 (en) | 1995-06-08 | 1995-06-08 | GLA-containing rayon fiber and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3776949B2 (en) |
-
1995
- 1995-06-08 JP JP16456895A patent/JP3776949B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| JPH08337918A (en) | 1996-12-24 |
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