JP2000239969A - Antibacterial molded article - Google Patents
Antibacterial molded articleInfo
- Publication number
- JP2000239969A JP2000239969A JP11045072A JP4507299A JP2000239969A JP 2000239969 A JP2000239969 A JP 2000239969A JP 11045072 A JP11045072 A JP 11045072A JP 4507299 A JP4507299 A JP 4507299A JP 2000239969 A JP2000239969 A JP 2000239969A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- lactic acid
- molded article
- polylactic acid
- antibacterial
- 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
Links
Landscapes
- Nonwoven Fabrics (AREA)
- Woven Fabrics (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、抗菌性能を有する
成形品に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded article having antibacterial properties.
【０００２】[0002]
【従来の技術】素材に抗菌性を付与する方法は従来より
今日にいたり行われており、例えば、繊維素材あるいは
繊維布帛やシート等を抗菌性物質によって表面処理を行
う方法がある。しかし、この方法では抗菌性能を付与で
きるものの、抗菌性能の耐久性に劣るという問題があ
る。これを解決する方法として、ナイロンやポリエステ
ルのような繊維素材の製造工程中に活性のある抗菌物質
を混合練り込むことによって製造する方法がある。しか
し、この方法では一定の抗菌性能を示すもののコスト高
になる。また、一般に、抗菌剤自体が一定の毒性を有す
るものが多く、安全上問題があった。2. Description of the Related Art A method of imparting antibacterial properties to a material has hitherto been used today. For example, there is a method in which a fiber material, a fiber cloth, a sheet or the like is subjected to a surface treatment with an antibacterial substance. However, although this method can impart antibacterial performance, there is a problem that the durability of the antibacterial performance is poor. As a method of solving this, there is a method in which an active antibacterial substance is mixed and kneaded in a manufacturing process of a fiber material such as nylon or polyester. However, although this method shows a certain antibacterial performance, it is costly. In general, many antibacterial agents themselves have a certain degree of toxicity, which poses a safety problem.
【０００３】[0003]
【発明が解決しようとする課題】本発明らは、上記問題
点に鑑み、コストが高くなく、かつ安全性のある抗菌剤
について、検討した。従来より、乳酸が食品の日持ちを
向上させる食品保存剤として用いられおり、乳酸が静菌
・防カビ作用を有することが知られている。しかし、乳
酸の脱水縮合重合体であるポリ乳酸系重合体からなる繊
維やフィルムには、抗菌性が認められるという明確な報
告はなく、ましてやポリ乳酸のポリマー組成物との関係
について抗菌性を論じた報告はない。本発明者らは、繊
維やフィルムへの成形加工工程で、乳酸が有する潜在的
な静菌・防カビ作用を発現させるべく、ポリ乳酸系重合
体と抗菌性との関係について種々検討した結果、ポリ乳
酸系重合体の構成成分においてある特定の組成範囲のも
のに、顕著な抗菌活性が認められることを見出し、本発
明に到達した。DISCLOSURE OF THE INVENTION In view of the above problems, the present inventors have studied an antibacterial agent which is inexpensive and safe. Hitherto, lactic acid has been used as a food preservative for improving the shelf life of food, and lactic acid is known to have a bacteriostatic and antifungal action. However, there is no clear report that fibers and films made of polylactic acid-based polymer, which is a dehydration-condensation polymer of lactic acid, have antibacterial properties.Moreover, antibacterial properties have been discussed in relation to polylactic acid polymer composition. There were no reports. The present inventors have conducted various studies on the relationship between polylactic acid-based polymers and antibacterial properties in order to develop the latent bacteriostatic and fungicidal action of lactic acid in the process of forming fibers and films, The present inventors have found that remarkable antibacterial activity is found in a specific composition range of a polylactic acid-based polymer component, and have reached the present invention.
【０００４】[0004]
【課題を解決するための手段】すなわち、本発明は、ポ
リ乳酸を主成分とするポリ乳酸系重合体からなる成形品
であり、成形品には親水性の界面活性剤が付与され、静
菌活性値が２．２以上であることを特徴とする抗菌性成
形品を要旨とするものである。That is, the present invention relates to a molded article comprising a polylactic acid-based polymer containing polylactic acid as a main component, wherein the molded article is provided with a hydrophilic surfactant, The gist of the present invention is an antibacterial molded article having an activity value of 2.2 or more.
【０００５】[0005]
【発明の実施の形態】本発明において、ポリ乳酸系重合
体は、熱可塑性脂肪族ポリエステルであって、ポリ（α
−ヒドロキシ酸）を主たる繰り返し単位とする重合体が
挙げられる。具体的には、ポリ（Ｄ−乳酸）、ポリ（Ｌ
−乳酸）、Ｄ−乳酸とＬ−乳酸との共重合体、Ｄ−乳酸
とヒドロキシカルボン酸との共重合体、Ｌ−乳酸とヒド
ロキシカルボン酸との共重合体、ＤＬ−乳酸とヒドロキ
シカルボン酸との共重合体等が挙げられ、これらの重合
体のうち、融点が８０℃以上である重合体が好ましい。
ここで、乳酸とヒドロキシカルボン酸との共重合体にお
けるヒドロキシカルボン酸としては、グリコール酸、ヒ
ドロキシ酪酸、ヒドロキシ吉草酸、ヒドロキシカプロン
酸、ヒドロキシヘプタン酸、ヒドロキシカプリル酸など
が挙げられる。DETAILED DESCRIPTION OF THE INVENTION In the present invention, the polylactic acid-based polymer is a thermoplastic aliphatic polyester,
-Hydroxy acid) as a main repeating unit. Specifically, poly (D-lactic acid), poly (L
-Lactic acid), a copolymer of D-lactic acid and L-lactic acid, a copolymer of D-lactic acid and hydroxycarboxylic acid, a copolymer of L-lactic acid and hydroxycarboxylic acid, DL-lactic acid and hydroxycarboxylic acid And a polymer having a melting point of 80 ° C. or more is preferable among these polymers.
Here, examples of the hydroxycarboxylic acid in the copolymer of lactic acid and hydroxycarboxylic acid include glycolic acid, hydroxybutyric acid, hydroxyvaleric acid, hydroxycaproic acid, hydroxyheptanoic acid, and hydroxycaprylic acid.
【０００６】ポリ乳酸系重合体は、数平均分子量が約２
０，０００以上、好ましくは４０，０００以上のものが
製糸性及び得られる成形品特性の点で好ましい。数平均
分子量の上限については、成形品が繊維である場合は、
溶融紡糸が行えるものであればよく、１５０，０００程
度であればよい。１５０，０００を超えると、溶融粘度
が高すぎて、溶融紡糸が困難となる。成形品がフィルム
である場合は、溶融成形が行えるものであればよい。The polylactic acid-based polymer has a number average molecular weight of about 2
Those having a molecular weight of at least 000, preferably at least 40,000 are preferred in view of the spinning properties and the properties of the obtained molded article. Regarding the upper limit of the number average molecular weight, when the molded article is a fiber,
What is necessary is just to be able to perform melt spinning, and may be about 150,000. If it exceeds 150,000, the melt viscosity is too high and melt spinning becomes difficult. When the molded product is a film, any material that can be melt-molded may be used.
【０００７】ポリ乳酸系重合体には、必要に応じて他の
添加剤、例えば艶消し剤や顔料、結晶核剤等の各種添加
剤を本発明の効果を損なわない範囲内で添加しても良
い。[0007] If necessary, other additives such as matting agents, pigments, nucleating agents and the like may be added to the polylactic acid-based polymer within a range that does not impair the effects of the present invention. good.
【０００８】本発明は、ポリ乳酸を主成分とするポリ乳
酸系重合体からなる成形品であり、成形品には親水性の
界面活性剤が付与されている。成形品としては、例え
ば、ポリ乳酸系重合体を溶融紡糸により得る繊維（モノ
フィラメント、マルチフィラメント）、得られた繊維を
カットしたステープルファイバー、ステープルファイバ
ーを紡績した紡績糸、モノフィラメントやマルチフィラ
メントおよび紡績糸を編織した布帛、また、カード法、
メルトブローン法、スパンボンド法等の乾式法や湿式法
等により得られる不織ウエブを接着法や機械的交絡法に
より不織布化した不織布、さらには、ポリ乳酸系重合体
を溶融押出により得るフィルム等が挙げられる。[0008] The present invention is a molded article comprising a polylactic acid-based polymer containing polylactic acid as a main component, and the molded article is provided with a hydrophilic surfactant. Examples of molded articles include fibers obtained by melt-spinning a polylactic acid-based polymer (monofilaments and multifilaments), staple fibers obtained by cutting the obtained fibers, spun yarns obtained by spinning staple fibers, monofilaments and multifilaments and spun yarns. Knitted fabric, card method,
Nonwoven fabrics obtained by forming nonwoven webs by a bonding method or a mechanical entanglement method into a nonwoven web obtained by a dry method or a wet method such as a melt blown method and a spunbond method, and further, a film obtained by melt-extruding a polylactic acid-based polymer. No.
【０００９】また、本発明のポリ乳酸系成形品におい
て、ポリ乳酸系重合体からなるもの以外の他の重合体か
らなるものが混合されていてもよく、ポリ乳酸系重合体
からなるものが３０重量％以上含有していれば本発明が
目的とする静菌・抗菌性能を発揮することができる。The polylactic acid-based molded article of the present invention may contain a mixture of another polymer other than the polylactic acid-based polymer. If it is contained in an amount of at least% by weight, the bacteriostatic and antibacterial properties aimed at by the present invention can be exhibited.
【００１０】混合状態としては、例えば、ポリ乳酸系重
合体からなる繊維と他の重合体からなる繊維との複合マ
ルチフィラメントや複合モノフィラメント、ポリ乳酸系
重合体からなる繊維と他の重合体からなる繊維との混繊
糸、ポリ乳酸系重合体からなる繊維または紡績糸と他の
重合体からなる繊維または紡績糸との交編織した布帛、
ポリ乳酸系重合体からなる繊維と他の重合体からなる繊
維との混合紡糸または混綿により得られる不織ウエブを
接着法や機械的交絡法等により不織布化した不織布等が
挙げられる。他の重合体とは、公知の芳香族ポリエステ
ル系重合体、脂肪族ポリエステル系重合体、ポリアミド
系重合体、ポリオレフィン重合体等が挙げられる。The mixed state includes, for example, a composite multifilament or a composite monofilament of a fiber made of a polylactic acid-based polymer and a fiber made of another polymer, or a fiber made of a polylactic acid-based polymer and another polymer. Mixed yarn with fiber, fiber or spun yarn composed of polylactic acid-based polymer and cross-woven fabric of fiber or spun yarn composed of another polymer,
A nonwoven fabric obtained by forming a nonwoven web obtained by mixing or spinning a fiber made of a polylactic acid-based polymer and a fiber made of another polymer into a nonwoven fabric by an adhesion method, a mechanical entanglement method, or the like. Examples of the other polymer include a known aromatic polyester polymer, aliphatic polyester polymer, polyamide polymer, polyolefin polymer and the like.
【００１１】ポリ乳酸系重合体からなる成形品には、親
水性の界面活性剤が付与されている。親水性の界面活性
剤としては、例えば、アニオン系界面活性剤、カチオン
系界面活性剤、ノニオン系界面活性剤、両性系界面活性
剤等が挙げられ、これらを単独または混合して用いる。
成形品に界面活性剤を付与する方法としては、所定濃度
（例えば、１〜１．５重量％程度）に調整した水溶液ま
たは水分散液の形態で成形品に噴霧するとよい。A molded article made of a polylactic acid-based polymer is provided with a hydrophilic surfactant. Examples of the hydrophilic surfactant include an anionic surfactant, a cationic surfactant, a nonionic surfactant, and an amphoteric surfactant. These may be used alone or in combination.
As a method for applying a surfactant to a molded article, it is preferable to spray the molded article in the form of an aqueous solution or aqueous dispersion adjusted to a predetermined concentration (for example, about 1 to 1.5% by weight).
【００１２】ポリ乳酸系重合体は疎水性であるため、ポ
リ乳酸系重合体からなる成形品もまた疎水性である。こ
のような疎水性のポリ乳酸系成形品は、素材自身が抗菌
性を持っていても、すなわち、後述するポリ乳酸系成形
品を構成するポリ乳酸系重合体中に、乳酸、ラクチドお
よびその他のオリゴ乳酸を含有していても、菌の繁殖を
積極的に抑える抗菌効果は発揮されない。本発明の親水
性界面活性剤が付与されて初めてポリ乳酸系成形品は、
成形品表面が親水性となるので、菌との接触が可能とな
り、菌の繁殖を抑えることができると推定される。Since the polylactic acid-based polymer is hydrophobic, a molded article made of the polylactic acid-based polymer is also hydrophobic. Such a hydrophobic polylactic acid-based molded article, even if the material itself has antibacterial properties, that is, in the polylactic acid-based polymer constituting the polylactic acid-based molded article described below, lactic acid, lactide and other Even if oligolactic acid is contained, the antibacterial effect that actively suppresses the growth of bacteria is not exhibited. For the first time the hydrophilic surfactant of the present invention is provided, a polylactic acid-based molded article is
It is presumed that since the surface of the molded article becomes hydrophilic, contact with bacteria becomes possible, and propagation of bacteria can be suppressed.
【００１３】このような抗菌効果は、ポリ乳酸系成形品
を構成しているポリ乳酸系重合体中に、微量の乳酸、ラ
クチドおよびその他のオリゴ乳酸を含有しているために
発揮されると推察される。本発明の成形品を構成するポ
リ乳酸系重合体中には、乳酸、ラクチドおよびその他の
オリゴ乳酸を０．０１〜１．０重量％含有していること
が好ましい。乳酸、ラクチドおよびその他のオリゴ乳酸
の含量が０．０１重量％未満であると抗菌性能の効果が
薄れ、一方、１．０重量％を超えると常温下でも空気中
の湿気等の水分により加水分解が進行するため、長期保
存安定性に欠ける傾向となる。It is presumed that such an antibacterial effect is exerted because a small amount of lactic acid, lactide and other oligolactic acids are contained in the polylactic acid-based polymer constituting the polylactic acid-based molded article. Is done. The polylactic acid-based polymer constituting the molded article of the present invention preferably contains 0.01 to 1.0% by weight of lactic acid, lactide and other oligolactic acids. If the content of lactic acid, lactide and other oligolactic acid is less than 0.01% by weight, the effect of antibacterial performance is weakened, while if it exceeds 1.0% by weight, it is hydrolyzed by moisture such as moisture in the air even at room temperature even at room temperature. Progresses, resulting in a tendency to lack long-term storage stability.
【００１４】本発明においては、ポリ乳酸系成形品を構
成するポリ乳酸系重合体中に含有する乳酸、ラクチドお
よびその他のオリゴ乳酸の量を上記範囲とするために
は、重合過程において反応条件を調節すること、あるい
は、重合終了後、溶融状態で減圧することにより過剰の
ラクチド、オリゴ乳酸等を除くことにより達成される。In the present invention, in order to control the amounts of lactic acid, lactide and other oligolactic acid contained in the polylactic acid-based polymer constituting the polylactic acid-based molded article within the above range, the reaction conditions in the polymerization process must be adjusted. It can be achieved by adjusting or by reducing the pressure in the molten state after the polymerization to remove excess lactide, oligolactic acid and the like.
【００１５】本発明のポリ乳酸系成形品に付与される親
水性の界面活性剤の量は、２００ｐｐｍ以上であること
が好ましい。付与量が２００ｐｐｍ未満であると、本発
明が目的とする抗菌性能が発揮されない。The amount of the hydrophilic surfactant provided to the polylactic acid-based molded article of the present invention is preferably at least 200 ppm. When the applied amount is less than 200 ppm, the antibacterial performance aimed at by the present invention is not exhibited.
【００１６】本発明のポリ乳酸系成形品は、統一試験法
（繊維製品衛生加工協議会認定の抗菌効果試験方法）に
よる静菌活性値が２．２以上である。静菌活性値とは、
一定の菌数の検定菌を標準試料および対象試料に植菌
し、一定時間培養後の標準試料の生菌数をＢ（ｃｅｌｌ
ｓ／ｍｌ）、一定時間培養後の対象試料の生菌数をＣ
（ｃｅｌｌｓ／ｍｌ）とし、ｌｏｇＢ−ｌｏｇＣで表さ
れる値をいう。静菌活性値が２．２未満であると、菌の
繁殖を抑えることができるとはいえない。The polylactic acid-based molded article of the present invention has a bacteriostatic activity value of 2.2 or more according to a unified test method (a test method for antibacterial effect certified by the Textile Sanitation Processing Council). The bacteriostatic activity value is
A certain number of test bacteria is inoculated into the standard sample and the target sample, and the viable cell count of the standard sample after culturing for a certain time is determined by B (cell).
s / ml) and the viable cell count of the target
(Cells / ml) and refers to a value represented by logB-logC. If the bacteriostatic activity value is less than 2.2, it cannot be said that the proliferation of bacteria can be suppressed.
【００１７】[0017]
【実施例】以下、実施例により本発明を具体的に説明す
る。なお、本発明はこれらの実施例のみに限定されるも
のではない。実施例において、各物性値は次のようにし
て求めた。 （１）融点（℃）：パーキンエルマ社製の示差走査熱量
計ＤＳＣ−７型を使用し、昇温速度を２０℃／分として
測定して得た融解吸熱曲線の極値を与える温度を融点
（℃）とした。The present invention will be described below in detail with reference to examples. Note that the present invention is not limited to only these examples. In the examples, each property value was obtained as follows. (1) Melting point (° C.): The temperature at which the extreme value of the melting endothermic curve obtained by using a differential scanning calorimeter DSC-7 manufactured by Perkin Elmer at a heating rate of 20 ° C./min is determined as the melting point. (° C.).
【００１８】（２）メルトフローレート（以下、ＭＦＲ
という。）（ｇ／１０分）：ＡＳＴＭＤ １２３８に記
載の方法に準じて２１０℃、荷重２１６０ｇにおける溶
融吐出量を測定した。(2) Melt flow rate (hereinafter referred to as MFR)
That. ) (G / 10 min): The melt discharge amount at 210 ° C. under a load of 2160 g was measured according to the method described in ASTM D1238.
【００１９】（３）ポリ乳酸の固有粘度：フェノールと
四塩化エタンの等重量混合溶液を溶媒とし、試料濃度
０．５ｇ／ｄｌ、温度２０℃で測定した。(3) Intrinsic viscosity of polylactic acid: Measured at a sample concentration of 0.5 g / dl and a temperature of 20 ° C. using a mixed solution of an equal weight of phenol and ethane tetrachloride as a solvent.
【００２０】（４）抗菌性能：抗菌性能は統一試験法
（繊維製品衛生加工協議会認定の抗菌効果試験方法）に
より、静菌活性値を測定し、抗菌性能を評価した。前記
評価にあたっては、使用菌株として、Staphylococcus a
ureus ATCC 6538P（黄色葡萄状球菌）を用いた。すなわ
ち、バイアル瓶に入れた滅菌済試料０．４ｇに生菌数を
１±０．３×１０5に調整した菌液０．２ｍｌを出来る
だけ均一に接種し、３７℃で１８時間培養する。ツイン
８０ ０．２％を添加した生理食塩水２０ｍｌを加え攪
拌し菌を洗い出す。１０倍希釈系列を作成しニュートリ
エント寒天培地と混釈し３７℃で２４時間以上培養しコ
ロニー数を数え、生菌数を求めた。静菌活性値の計算と
しては、標準試料および試験試料について、上記試験を
それぞれ行い、下式から静菌活性値を求めた。なお、標
準試料としては、ナイロン標準白布を用いた。試験試料
については、未洗と１０洗後（洗濯洗剤：ＪＡＦＥＴ標
準洗剤（４０ｇ／３０Ｌ）について測定した。 静菌活性値＝ｌｏｇＢ−ｌｏｇＣ Ｂ：標準試料の１８時間培養後、回収した菌数 Ｃ：試験試料の１８時間培養後、回収した菌数(4) Antibacterial performance: The antibacterial performance was evaluated by measuring the bacteriostatic activity value by a unified test method (an antibacterial effect test method approved by the Textile Sanitation Processing Council). In the evaluation, Staphylococcus a
ureus ATCC 6538P (Staphylococcus aureus) was used. That is, 0.4 ml of a sterilized sample placed in a vial is inoculated as uniformly as possible with 0.2 ml of a bacterial solution having a viable cell count adjusted to 1 ± 0.3 × 10 5, and cultured at 37 ° C. for 18 hours. Twenty ml of physiological saline containing 0.2% of Twin 80 is added, and the mixture is stirred to wash out the bacteria. A 10-fold dilution series was prepared, diluted with a nutrient agar medium, cultured at 37 ° C. for 24 hours or more, the number of colonies was counted, and the number of viable bacteria was determined. For the calculation of the bacteriostatic activity value, the above test was performed for each of the standard sample and the test sample, and the bacteriostatic activity value was determined from the following equation. In addition, a nylon standard white cloth was used as a standard sample. The test sample was measured for unwashed and after 10 washes (laundry detergent: JAFET standard detergent (40 g / 30 L). Bacteriostatic activity value = logB-logCB: Number of bacteria recovered after 18 hours of cultivation of the standard sample C : Number of bacteria recovered after cultivation of test sample for 18 hours
【００２１】実施例１ ポリ乳酸系短繊維を作成するために、光学純度が９８．
８％で融点１７０℃、ＭＦＲ２５ｇ／１０分のポリＬ−
乳酸樹脂を溶融し、紡糸温度２２０℃、単孔吐出量０．
４１ｇ／分の条件下で、紡糸口金より溶融紡糸した。次
に、紡出糸条を冷却装置にて冷却し、紡糸油剤を付与し
た後、引き取り速度８００ｍ／分で巻き取った。次い
で、得られた未延伸糸を延伸トウ繊度が３０万デニール
となるよう合糸してトウとなし、周速の異なる公知の延
伸機を用いて、延伸温度１２０℃、延伸倍率を２.６倍
として延伸を行った後、クリンパーにて捲縮を付与し、
分子量６００のポリエチレングリコールモノオレートを
２０重量％含有した仕上げ油剤を０．３重量％付与し
た。その後、トウを乾燥させ、引き続き５１ｍｍの長さ
に切断して、２デニールのポリ乳酸系短繊維を得た。Example 1 In order to prepare polylactic acid-based short fibers, the optical purity was 98.
Poly L- at 8%, melting point 170 ° C, MFR 25g / 10min
The lactic acid resin is melted, the spinning temperature is 220 ° C., and the single hole discharge amount is 0.
Under a condition of 41 g / min, spinning was performed from a spinneret. Next, the spun yarn was cooled by a cooling device, a spinning oil was applied, and the yarn was wound at a take-up speed of 800 m / min. Next, the obtained undrawn yarn is combined into a tow by drawing the drawn tow with a denier of 300,000 denier, using a known drawing machine having a different peripheral speed, at a drawing temperature of 120 ° C. and a draw ratio of 2.6. After stretching as a double, crimping is applied with a crimper,
0.3% by weight of a finishing oil containing 20% by weight of polyethylene glycol monooleate having a molecular weight of 600 was applied. Thereafter, the tow was dried and subsequently cut into a length of 51 mm to obtain 2-denier polylactic acid-based short fibers.
【００２２】得られたポリ乳酸系短繊維をパラレルカー
ド機に通してウエブとし、引き続いて、温度１２５℃、
線圧３０ｋｇ／ｃｍ、圧接面積比６．８％のエンボスロ
ールからなるエンボス装置に通して、目付５０ｇ／ｍ2
の短繊維不織布を得た。The obtained polylactic acid-based staple fibers are passed through a parallel card machine to form a web.
It was passed through an embossing device consisting of an embossing roll having a linear pressure of 30 kg / cm and a pressure contact area ratio of 6.8% to give a basis weight of 50 g / m 2
Was obtained.
【００２３】実施例２ 実施例１で得られたポリ乳酸系短繊維とポリエチレンテ
レフタレートからなる短繊維（２デニール×５１ｍｍ）
とを７０／３０（重量比）の割合で混綿し、パラレルカ
ード機に通した後、実施例１と同様の条件でエンボス装
置に通して、目付５０ｇ／ｍ2の短繊維不織布を得た。Example 2 Short fibers composed of the polylactic acid-based short fibers obtained in Example 1 and polyethylene terephthalate (2 denier × 51 mm)
Was mixed at a ratio of 70/30 (weight ratio), passed through a parallel card machine, and then passed through an embossing device under the same conditions as in Example 1 to obtain a short-fiber nonwoven fabric having a basis weight of 50 g / m 2 .
【００２４】実施例３ 実施例１で得られたポリ乳酸系短繊維とポリエチレンテ
レフタレートからなる短繊維（２デニール×５１ｍｍ）
とを３０／７０（重量比）の割合で混綿し、パラレルカ
ード機に通した後、実施例１と同様の条件でエンボス装
置に通して、目付５０ｇ／ｍ2の短繊維不織布を得た。Example 3 Short fibers composed of the polylactic acid-based short fibers obtained in Example 1 and polyethylene terephthalate (2 denier × 51 mm)
Were mixed at a ratio of 30/70 (weight ratio), passed through a parallel card machine, and then passed through an embossing device under the same conditions as in Example 1 to obtain a short-fiber nonwoven fabric having a basis weight of 50 g / m 2 .
【００２５】実施例４ 光学純度が９９．０％で、ＭＦＲ２０ｇ／１０分、融点
１７２℃のポリＬ−乳酸樹脂を溶融し、紡糸温度２２０
℃、単孔吐出量０．８８ｇ／分の条件下で孔数３６個有
する紡糸口金より溶融紡糸した。次に、紡糸糸条を冷却
装置にて冷却し、分子量６００のポリエチレングリコー
ルモノオレートを２０重量％願湯した紡糸油剤を付与
し、延伸温度１２０℃、延伸倍率１．５３、速度４００
０ｍ／分で巻き取って、７５デニール／３６フィラメン
トのマルチフィラメント（スピンドロー糸）を得た。な
お、この繊維の油剤付着量は、０．６重量％であった。
次いで、得られたマルチフィラメントを用いて、針数２
７０本の筒編機（小池製作所製）で製編した。Example 4 A poly L-lactic acid resin having an optical purity of 99.0%, an MFR of 20 g / 10 min and a melting point of 172 ° C. was melted, and a spinning temperature of 220 ° C.
Melt spinning was performed from a spinneret having 36 holes at a temperature of ° C and a single hole discharge rate of 0.88 g / min. Next, the spun yarn is cooled by a cooling device, and a spinning oil agent containing 20% by weight of polyethylene glycol monooleate having a molecular weight of 600 is applied. The drawing temperature is 120 ° C., the drawing ratio is 1.53, and the speed is 400.
Winding was performed at 0 m / min to obtain a multifilament (spin draw yarn) of 75 denier / 36 filaments. The amount of the oil agent adhering to the fiber was 0.6% by weight.
Then, using the obtained multifilament, the number of stitches was 2
Knitting was performed with a 70-tube knitting machine (manufactured by Koike Seisakusho).
【００２６】得られた実施例１〜４の布帛を対象試料と
して、抗菌性能の評価を行い、その結果を表１に示し
た。Antibacterial performance was evaluated using the obtained fabrics of Examples 1 to 4 as target samples. The results are shown in Table 1.
【００２７】[0027]
【表１】 [Table 1]
【００２８】表１から明らかなように、実施例１〜４の
布帛はいずれも優れた静菌性能があるものであった。As is clear from Table 1, the fabrics of Examples 1 to 4 all had excellent bacteriostatic performance.
【００２９】比較例１ 市販のポリエチレンテレフタレートからなるマルチフィ
ラメント（７５デニール／３６フィラメント）を脱脂し
た後、実施例１で用いた親水性界面活性剤を含有してな
る油剤を０．６重量％付着させた。次いで、得られた長
繊維を用い、針数２７０本の筒編機（小池製作所製）で
製編した。得られた比較例１の布帛を対象試料として、
抗菌性能の評価を行ったところ、静菌活性値は、未洗、
１０洗とも０．２以下であり、静菌・抗菌性能を有する
ものではなかった。Comparative Example 1 After multifilaments (75 denier / 36 filaments) made of commercially available polyethylene terephthalate were degreased, 0.6% by weight of the oil containing the hydrophilic surfactant used in Example 1 was adhered. I let it. Next, using the obtained long fiber, knitting was performed using a tubular knitting machine (manufactured by Koike Seisakusho) having 270 needles. Using the obtained fabric of Comparative Example 1 as a target sample,
When the antibacterial performance was evaluated, the bacteriostatic activity value was not washed,
It was 0.2 or less for all 10 washes, and did not have bacteriostatic / antibacterial properties.
【００３０】[0030]
【発明の効果】本発明によれば、ポリ乳酸系成形品に親
水性油剤が付与されたものであって、油剤を付与したこ
とによってポリ乳酸系成形品の表面が親水性となること
で、菌と接触が可能となり、菌の繁殖を抑制するという
静菌・抗菌効果を発揮することができたものと考えられ
る。According to the present invention, a polylactic acid-based molded article is provided with a hydrophilic oil agent, and the surface of the polylactic acid-based molded article becomes hydrophilic by applying the oil agent. It is considered that contact with the bacteria was made possible and the bacteriostatic and antibacterial effect of suppressing the growth of the bacteria could be exerted.
【００３１】また、本発明の成形品は、ポリ乳酸系重合
体からなるため、安全性が極めて高く、また、重合体を
溶融させて、様々な形状に成形加工が可能であるので、
食品保存剤、各種包装材、壁紙、各種フィルター、流し
等の水切り袋、テーブルクロス、足拭きマット、ふき
ん、スポンジ等の日用品・生活関連資材、農園芸資材、
医療・衛生材、衣料品等の様々な分野において、静菌・
抗菌性能を発揮することができるものである。Since the molded article of the present invention is made of a polylactic acid-based polymer, it has extremely high safety, and can be formed into various shapes by melting the polymer.
Food preservatives, various packaging materials, wallpaper, various filters, drainage bags such as sinks, tablecloths, foot wipes, towels, sponges, and other daily necessities and living-related materials, agricultural and horticultural materials,
In various fields such as medical and hygiene materials and clothing,
It can exhibit antibacterial performance.
Claims (6)
体からなる成形品であり、成形品には親水性界面活性剤
が付与され、静菌活性値が２．２以上であることを特徴
とする抗菌性成形品。1. A molded article comprising a polylactic acid-based polymer containing polylactic acid as a main component, wherein the molded article is provided with a hydrophilic surfactant and has a bacteriostatic activity value of 2.2 or more. Characterized antibacterial molded product.
与されていることを特徴とする請求項１記載の抗菌性成
形品。2. The antibacterial molded article according to claim 1, wherein the hydrophilic surfactant is provided in an amount of 200 ppm or more.
酸）、ポリ（Ｌ-乳酸）、Ｄ-乳酸とＬ-乳酸との共重合
体、Ｄ-乳酸とヒドロキシカルボン酸との共重合体、Ｌ-
乳酸とヒドロキシカルボン酸との共重合体、ＤＬ−乳酸
とヒドロキシカルボン酸との共重合体とから選ばれるい
ずれかの重合体、あるいはこれらのブレンド体であるこ
とを特徴とする請求項１または２に記載の抗菌性成形
品。3. The polylactic acid-based polymer is poly (D-lactic acid), poly (L-lactic acid), a copolymer of D-lactic acid and L-lactic acid, or a copolymer of D-lactic acid and hydroxycarboxylic acid. Combined, L-
3. A polymer selected from a copolymer of lactic acid and hydroxycarboxylic acid, a copolymer of DL-lactic acid and hydroxycarboxylic acid, or a blend thereof. The antibacterial molded article according to 1.
して得た繊維であることを特徴とする請求項１から３の
いずれかに記載の抗菌性成形品。4. The antibacterial molded article according to claim 1, wherein the molded article is a fiber obtained by melt-spinning a polylactic acid-based polymer.
して得た繊維からなる不織布であることを特徴とする請
求項１から３のいずれかに記載の抗菌性成形品。5. The antibacterial molded article according to claim 1, wherein the molded article is a nonwoven fabric made of a fiber obtained by melt-spinning a polylactic acid-based polymer.
して得た繊維を編織してなる織編物であることを特徴と
する請求項１から３のいずれかに記載の抗菌性成形品。6. The antibacterial molding according to any one of claims 1 to 3, wherein the molded product is a woven or knitted product obtained by knitting and / or weaving fibers obtained by melt-spinning a polylactic acid-based polymer. Goods.
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|---|---|---|---|
| JP04507299A JP4099282B2 (en) | 1999-02-23 | 1999-02-23 | Antibacterial molded product |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04507299A JP4099282B2 (en) | 1999-02-23 | 1999-02-23 | Antibacterial molded product |
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| Publication Number | Publication Date |
|---|---|
| JP2000239969A true JP2000239969A (en) | 2000-09-05 |
| JP4099282B2 JP4099282B2 (en) | 2008-06-11 |
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ID=12709150
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04507299A Expired - Fee Related JP4099282B2 (en) | 1999-02-23 | 1999-02-23 | Antibacterial molded product |
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