JP2019206351A - Packing material for sterilization with surface wear resistance - Google Patents

Packing material for sterilization with surface wear resistance Download PDF

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JP2019206351A
JP2019206351A JP2018101381A JP2018101381A JP2019206351A JP 2019206351 A JP2019206351 A JP 2019206351A JP 2018101381 A JP2018101381 A JP 2018101381A JP 2018101381 A JP2018101381 A JP 2018101381A JP 2019206351 A JP2019206351 A JP 2019206351A
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nonwoven fabric
sterilization
packaging material
fiber
resin
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悠介 佐々木
Yusuke Sasaki
悠介 佐々木
英治 塩田
Eiji Shioda
英治 塩田
純一 日下部
Junichi Kusakabe
純一 日下部
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Asahi Kasei Corp
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Abstract

【課題】高い毛羽伏せ性(耐表面摩耗性)、高バリア性、高通気性を有する合成樹脂繊維の不織布からなる滅菌用包装材料の提供。【解決手段】鞘部の樹脂の融点が芯部の樹脂の融点よりも低い鞘芯構造糸を表層に配した合成樹脂繊維の不織布からなる滅菌用包装材料。【選択図】なしPROBLEM TO BE SOLVED: To provide a sterilization packaging material made of a nonwoven fabric of synthetic resin fiber having high fluff binding property (surface abrasion resistance), high barrier property and high air permeability. SOLUTION: The sterilization packaging material is made of a nonwoven fabric of synthetic resin fiber having a sheath-core structured yarn in which the melting point of the resin of the sheath is lower than the melting point of the resin of the core. [Selection diagram] None

Description

本発明は、医療器具の滅菌に用いられる滅菌用包装材料に関する。より詳しくは、本発明は、合成繊維樹脂の不織布からなる耐表面摩耗性を有する滅菌用包装材料に関する。   The present invention relates to a packaging material for sterilization used for sterilization of medical instruments. More specifically, the present invention relates to a sterilization packaging material having a surface abrasion resistance made of a synthetic fiber resin nonwoven fabric.

医療器具は、感染症防止のため、滅菌処理を施して使用することが既に知られており、同処理を施す器具として、具体的には、ゾンデ、メス、ピンセット、ハサミ、等が挙げられる。滅菌処理の方法としては、高温高圧蒸気法、エチレンオキサイドガス法等が用いられ、これらの方法に適した滅菌用包装材料が使用されている。滅菌用包装材料に適した繊維質のシートには、通気性が良好であること、耐表面摩耗性が高いこと、高いバリア性を有すること等が必要とされる。特に耐表面摩耗性に関しては、重要である。なぜなら、滅菌用包装材料は、医療スタッフがゴム手袋等、摩擦係数の高い用具にて包装材料表面を摩耗する機会が多く、その際に毛羽や紙粉等が生じると、細菌感染等のリスクが増大するからである。   It is already known that medical devices are used after being sterilized to prevent infectious diseases, and specific examples of the devices to be treated include a sonde, a scalpel, tweezers, scissors, and the like. As a sterilization method, a high-temperature high-pressure steam method, an ethylene oxide gas method, or the like is used, and sterilization packaging materials suitable for these methods are used. A fibrous sheet suitable for packaging materials for sterilization is required to have good air permeability, high surface wear resistance, high barrier properties, and the like. In particular, the surface wear resistance is important. This is because the packaging material for sterilization has many opportunities for medical staff to wear the surface of the packaging material with rubber gloves and other tools with a high coefficient of friction. If fluff or paper dust is generated at that time, there is a risk of bacterial infection, etc. This is because it increases.

一般に、滅菌用包装材料としては、パルプ系、ポリエチレンをはじめとする合成繊維樹脂を原料とした不織布やフィルムが使用されているが、近年、内部が見えるように不織布と透明な樹脂フィルム等を組み合わせて袋状体になるように貼り合わせたものも使用されている。   In general, as a packaging material for sterilization, non-woven fabrics and films made of synthetic fiber resins such as pulp and polyethylene are used. In recent years, non-woven fabrics and transparent resin films are combined so that the inside can be seen. Also used are those that are bonded together to form a bag-like body.

例えば、以下の特許文献1には、医療分野で使用される繊維質シートとしてポリエチレン樹脂を使用したフラッシュ紡糸法で製造された不織布が報告されている。フラッシュ紡糸では、糸径が均一ではなく、平均繊維径が2μm以下である領域は製造することはできず、得られる不織布の目付分散性も良好ではなく、また、溶剤等を使用する必要があるため、安全性の面からも、実用的でない。   For example, Patent Document 1 below reports a nonwoven fabric produced by a flash spinning method using a polyethylene resin as a fiber sheet used in the medical field. In flash spinning, a region in which the yarn diameter is not uniform and the average fiber diameter is 2 μm or less cannot be produced, and the nonwoven fabric obtained has poor basis weight dispersibility, and it is necessary to use a solvent or the like. Therefore, it is not practical from the viewpoint of safety.

また、以下の特許文献2には、パルプ系の滅菌紙が報告され、滅菌紙と合成樹脂フィルムをラミネーションすることで、ヒートシール性が得られることが記載されている。しかしながら、滅菌用包装材料としてパルプ系の滅菌紙を用いた場合には、長繊維系不織布と比べ、繊維1本1本が連続しておらず、加工時に紙粉が飛散し、医療器具として致命的な問題となる。また、パルプ系の滅菌紙は、アルコール、水等が頻繁に使用される環境下では非常にもろく、包装材料として不適格である。   Patent Document 2 below reports pulp-based sterilized paper and describes that heat sealability can be obtained by laminating sterilized paper and a synthetic resin film. However, when pulp-based sterilized paper is used as a packaging material for sterilization, each fiber is not continuous, and paper dust is scattered during processing, which is fatal as a medical device. Problem. Pulp-based sterilized paper is very fragile in an environment where alcohol, water, etc. are frequently used, and is not suitable as a packaging material.

また、以下に特許文献3には、メルトブロウン不織布を用いた積層不織布が報告されている。一般的に不織布を積層する場合、カレンダー加工による熱ボンデイングやバインダーによる化学ボンデイング等の手法が用いられる。熱ボンデイングでは、高温処理を行うため繊維の過度な溶融により間隙が減少することで通気性が損なわれ、滅菌処理効果に影響を及ぼす。また、化学ボンデイングでは、バインダー成分の医療器具、医療現場への混入の恐れがある。   Further, Patent Document 3 below reports a laminated nonwoven fabric using a meltblown nonwoven fabric. In general, when laminating non-woven fabrics, methods such as heat bonding by calendering and chemical bonding by a binder are used. In heat bonding, since high temperature processing is performed, the gap is reduced due to excessive melting of the fibers, thereby impairing air permeability and affecting the sterilization effect. Further, in chemical bonding, there is a risk of the binder component being mixed into a medical device or medical site.

特開2014−237478号公報JP 2014-237478 A 特開平7−238449号公報JP 7-238449 A 国際公開第2017/146050号International Publication No. 2017/146050

前記した従来技術の問題点に鑑み、本発明が解決しようとする課題は、包装材料としての加工適正があり、良好な毛羽伏せ性(耐表面摩耗性)を有しながら、高い通気性、バリア性も併せ持つ滅菌用包装材料を提供することである。   In view of the above-described problems of the prior art, the problem to be solved by the present invention is that processing is suitable as a packaging material and has good fluffing properties (surface wear resistance), but also has high air permeability and barrier. It is to provide a packaging material for sterilization that also has a property.

本発明者らは、前記課題を解決すべく鋭意研究し実験を重ねた結果、鞘部の樹脂の融点が芯部の樹脂の融点よりも低い鞘芯構造糸を表層に配した合成樹脂繊維の不織布を用いることにより、より高生産、高性能な滅菌用包装材料が得られることを見出し、本発明を完成するに至ったものである。すなわち、本発明は以下の通りのものである。   As a result of diligent research and experiments to solve the above-mentioned problems, the inventors of the present invention have found that a synthetic resin fiber in which a sheath-core structured yarn having a melting point of the sheath resin lower than the melting point of the core resin is arranged on the surface layer. It has been found that by using a nonwoven fabric, a packaging material for sterilization with higher production and higher performance can be obtained, and the present invention has been completed. That is, the present invention is as follows.

[1]鞘部の樹脂の融点が芯部の樹脂の融点よりも低い鞘芯構造糸を表層に配した合成樹脂繊維の不織布からなる滅菌用包装材料。
[2]前記鞘芯構造糸を配した表層の毛羽等級が3級以上である、前記[1]に記載の滅菌用包装材料。
[3]粒径1μm以上の粒子の大気塵捕集効率が80%以上である、前記[1]又は[2]に記載の滅菌用包装材料。
[4]ガーレ型通気度試験において100mlの空気が通過する時間から得られる通気度が100秒/100ml以下である、前記[1]〜[3]のいずれかに記載の滅菌用包装材料。
[5]前記合成繊維不織布が、平均繊維径5〜30μmの繊維からなる不織布層(I)と平均繊維径0.1〜4μmの繊維からなる不織布層(II)から構成される積層不織布である、前記[1]〜[4]のいずれかに記載の滅菌用包装材料。
[6]前記積層不織布は、2つの前記不織布層(I)の間に中間層として前記不織布層(II)を有するものである、前記[5]に記載の滅菌用包装材料。
[7]前記積層不織布の平均流量孔径が0.1〜30μmであり、かつ、バブルポイントが0.5〜50μである、前記[5]又は[6]に記載の滅菌用包装材料。
[8]前記積層不織布の目付が8.0〜100g/m、であり、かつ、厚みが0.03〜1.0mmである、前記[5]〜[7]のいずれかに記載の滅菌用包装材料。
[9]前記積層不織布の引張強度が10〜300N/25mm巾であり、かつ、突き刺し強度が70〜700Nである、前記[5]〜[8]のいずれかに記載の滅菌用包装材料。
[10]前記合成樹脂繊維は連続長繊維である、前記[1]〜[9]のいずれかに記載の滅菌用包装材料。
[11]前記合成樹脂繊維不織布が、カレンダー加工を施されたものである、前記[1]〜[10]のいずれかに記載の滅菌用包装材料。
[1] A sterilization packaging material comprising a non-woven fabric of synthetic resin fibers in which a sheath-core structured yarn having a melting point of the sheath resin lower than that of the core resin is arranged on the surface layer.
[2] The packaging material for sterilization according to [1] above, wherein the fluff grade of the surface layer on which the sheath-core structured yarn is arranged is grade 3 or higher.
[3] The sterilization packaging material according to [1] or [2] above, wherein the air dust collection efficiency of particles having a particle diameter of 1 μm or more is 80% or more.
[4] The sterilization packaging material according to any one of [1] to [3], wherein an air permeability obtained from a time required for 100 ml of air to pass in a Gurley type air permeability test is 100 seconds / 100 ml or less.
[5] The synthetic nonwoven fabric is a laminated nonwoven fabric composed of a nonwoven fabric layer (I) composed of fibers having an average fiber diameter of 5 to 30 μm and a nonwoven fabric layer (II) composed of fibers having an average fiber diameter of 0.1 to 4 μm. The sterilization packaging material according to any one of [1] to [4].
[6] The sterilization packaging material according to [5], wherein the laminated nonwoven fabric has the nonwoven fabric layer (II) as an intermediate layer between the two nonwoven fabric layers (I).
[7] The packaging material for sterilization according to [5] or [6], wherein the laminated nonwoven fabric has an average flow pore size of 0.1 to 30 μm and a bubble point of 0.5 to 50 μm.
[8] The sterilization according to any one of [5] to [7], wherein the weight of the laminated nonwoven fabric is 8.0 to 100 g / m 2 , and the thickness is 0.03 to 1.0 mm. Packaging materials.
[9] The sterilization packaging material according to any one of [5] to [8], wherein the laminated nonwoven fabric has a tensile strength of 10 to 300 N / 25 mm width and a puncture strength of 70 to 700 N.
[10] The packaging material for sterilization according to any one of [1] to [9], wherein the synthetic resin fiber is a continuous long fiber.
[11] The sterilization packaging material according to any one of [1] to [10], wherein the synthetic resin fiber nonwoven fabric is calendered.

本発明に係る滅菌用包装材料は、低融点成分を鞘側に有する鞘芯構造糸を用いることで、温和な条件での毛羽伏せが可能な不織布である。これにより、高バリア性、高通気性を有しながら高い毛羽伏せ性(耐表面表摩耗性)を達成している。また、本発明に係る滅菌用包装材料は、特定の構造を有し、高度に孔径制御された積層不織布を用いることで蒸気滅菌などのあらゆる滅菌方法に対応可能であるし、安定した加工工程で、歩留まりがよく、低コストで生産することでき、さらに、適当な通気性と、孔径を有するため、包材内部の滅菌状態を維持できる細菌バリア性が非常に良好であり、紙粉等の飛散も少なく品質安定性が優れるため、高性能、高品質である。   The packaging material for sterilization according to the present invention is a nonwoven fabric that can be fluffed under mild conditions by using a sheath-core structured yarn having a low melting point component on the sheath side. This achieves high fluffing properties (surface wear resistance) while having high barrier properties and high air permeability. In addition, the packaging material for sterilization according to the present invention has a specific structure and can be applied to all sterilization methods such as steam sterilization by using a laminated nonwoven fabric with a highly controlled pore diameter, and with a stable processing step. It has good yield, can be produced at low cost, and has an appropriate air permeability and pore size, so it has a very good bacterial barrier property that can maintain the sterilized state inside the packaging material, and it can disperse paper dust etc. Because there is little quality stability, it has high performance and high quality.

以下、本発明の実施形態について詳細に説明する。
本実施形態の滅菌用包装材料は、鞘部の樹脂の融点が芯部の樹脂の融点よりも低い鞘芯構造糸を表層に配した合成樹脂繊維の不織布からなることを特徴とする。
実施形態の滅菌用包装材料は、鞘部の樹脂の融点が芯部の樹脂の融点よりも低い鞘芯構造糸を表層に配した合成樹脂繊維の不織布からなるため、熱ボンデイングを行う際、2成分樹脂の内、より低い溶融温度で糸−糸間の結着を発現させ、鞘芯繊維構造を破壊せずに、不織布の高い毛羽伏せ性(耐表面摩耗性)を達成すことが可能となる。また、鞘芯構造とすることで、芯成分により十分な単糸強度を保持することが可能となり、不織布としての引張、引裂、突刺等の機械強度を高めることができる。さらに、熱ボンデイングする際、熱により鞘成分が選択的に溶融され、糸構造を破壊することなく糸−糸交絡点での表面接着が可能となる。糸構造が破壊されることは、滅菌包装材料では致命的である。なぜなら、糸−糸の間隙が作り出す空間こそが不織布特有の孔構造となり、この孔構造の制御こそが滅菌用包装材料で最も重要となる細菌バリア性、及び滅菌効率に直結する通気性に大きな影響を及ぼすからである。それゆえ、鞘芯構造糸の鞘成分は芯成分よりも融点が10℃以上低いことが好ましく、鞘成分の融点が芯成分の融点よりも30℃以上低いことがより好ましい。
Hereinafter, embodiments of the present invention will be described in detail.
The packaging material for sterilization of this embodiment is characterized by comprising a synthetic resin fiber non-woven fabric in which a sheath-core structured yarn having a lower melting point of the sheath resin than the melting point of the core resin is arranged on the surface layer.
The packaging material for sterilization according to the embodiment is made of a synthetic resin fiber nonwoven fabric in which a sheath core structure yarn having a melting point of the resin of the sheath part lower than the melting point of the resin of the core part is arranged on the surface layer. Among component resins, it is possible to achieve yarn-to-yarn binding at a lower melting temperature and achieve high fluffing (surface abrasion resistance) of the nonwoven fabric without destroying the sheath fiber structure. Become. Moreover, by setting it as a sheath core structure, it becomes possible to hold | maintain sufficient single yarn intensity | strength with a core component, and can improve mechanical strength, such as a tension | tensile_strength, tearing, and piercing as a nonwoven fabric. Further, when heat bonding is performed, the sheath component is selectively melted by heat, and surface bonding at the yarn-yarn entanglement point becomes possible without destroying the yarn structure. The destruction of the yarn structure is fatal in sterile packaging materials. This is because the space created by the thread-thread gap is the pore structure unique to nonwoven fabrics, and the control of this pore structure has the greatest impact on the bacterial barrier properties that are most important in sterilization packaging materials, and the air permeability that is directly linked to sterilization efficiency. It is because it exerts. Therefore, the sheath component of the sheath-core structured yarn preferably has a melting point that is 10 ° C. or more lower than that of the core component, and more preferably the melting point of the sheath component is 30 ° C. or less lower than the melting point of the core component.

本実施形態の滅菌用包装材料の鞘芯構造糸を用いた表層の毛羽等級は、3級以上であることが好ましく、より好ましくは4級以上である。毛羽等級が3級未満では、医療現場で取り扱う際に糸屑が発生し、医療器具等に付着し異物として混入する恐れがある。   The fluff grade of the surface layer using the sheath-core structured yarn of the packaging material for sterilization of the present embodiment is preferably grade 3 or higher, more preferably grade 4 or higher. When the fluff grade is less than the third grade, there is a risk that lint is generated when handled in the medical field, and adheres to a medical instrument or the like and is mixed as a foreign substance.

本実施形態の滅菌用包装材料は、粒径1μm以上の粒子の大気塵捕集効率が80%以上あることが好ましく、より好ましくは90%以上、さらに好ましくは95%以上である。粒径1μm以上の粒子の大気塵捕集効率が80%未満であると滅菌後に包装材料内の無菌状態を保つことができず、菌の感染の恐れがある。   The packaging material for sterilization of this embodiment preferably has an atmospheric dust collection efficiency of 80% or more for particles having a particle size of 1 μm or more, more preferably 90% or more, and further preferably 95% or more. If the air dust collection efficiency of particles having a particle size of 1 μm or more is less than 80%, the sterilized state in the packaging material cannot be maintained after sterilization, and there is a risk of bacterial infection.

本実施形態の滅菌用包装材料の通気度は、ガーレ型通気度試験で100mlの空気積層不織布を通過する時間が100秒/100ml以下であることが好ましく、より好ましくは10秒/100ml以下、さらに好ましくは5秒/100ml以下である。100秒/100mlを超えると、高温高圧蒸気、エチレンオキサイドガス等の滅菌ガスの通気性が悪く、滅菌用包装材料として機能しない。   The air permeability of the packaging material for sterilization of this embodiment is preferably 100 seconds / 100 ml or less, more preferably 10 seconds / 100 ml or less, more preferably 10 seconds / 100 ml or less, and more preferably 10 hours / 100 ml or less. Preferably, it is 5 seconds / 100 ml or less. If it exceeds 100 seconds / 100 ml, the air permeability of sterilization gas such as high-temperature high-pressure steam and ethylene oxide gas is poor, and it does not function as a packaging material for sterilization.

本実施形態の滅菌用包装材料を構成する合成繊維樹脂の不織布は、極細繊維層を含む少なくとも2層以上の積層不織布であることが好ましい。極細繊維層を含む不織布は、微小の孔径を有し、繊維表面の比表面積が大きくなり、良好な通気性、細菌バリア性が得られる。かかる積層不織布は、平均繊維径5〜30μmの繊維からなる不織布層(I)と平均繊維径0.1〜4μmの繊維からなる不織布層(II)から構成される積層不織布であることができる。不織布層(I)を構成する繊維の平均繊維径が30μm以下であれば、繊維の径が太過ぎず、均一な繊維間距離を得ることができるため、緻密で均一な不織布積層体を得ることができ、不織布層(I)と不織布層(II)を互いに接するように積層した場合に、不織布層(II)を構成する構成する極細繊維が、不織布層(I)を構成する繊維の間により均一に配置される。これにより、積層不織布の孔径は均一にすることができ、最大孔径を意味するバブルポイントは小さくなり、良好な細菌バリア性を達成することができる。場合により、不織布層(II)は2層以上にしてもよい。他方、不織布層(I)を構成する繊維の平均繊維径が5μm以上であれば、単糸強度が強くなり、積層不織布が十分な引張、突刺強度を達成することができ、加工性も安定する。それゆえ、不織布層(I)を構成する不織布の平均繊維径は、より好ましくは7〜20μm、さらに好ましくは9〜18μmである。   The synthetic fiber resin nonwoven fabric constituting the packaging material for sterilization of this embodiment is preferably a laminated nonwoven fabric of at least two layers including an ultrafine fiber layer. A nonwoven fabric including an ultrafine fiber layer has a fine pore diameter, a specific surface area of the fiber surface is increased, and good air permeability and bacterial barrier properties are obtained. Such a laminated nonwoven fabric can be a laminated nonwoven fabric composed of a nonwoven fabric layer (I) composed of fibers having an average fiber diameter of 5 to 30 μm and a nonwoven fabric layer (II) composed of fibers having an average fiber diameter of 0.1 to 4 μm. If the average fiber diameter of the fibers constituting the nonwoven fabric layer (I) is 30 μm or less, the fiber diameter is not too large and a uniform inter-fiber distance can be obtained, so that a dense and uniform nonwoven fabric laminate is obtained. When the non-woven fabric layer (I) and the non-woven fabric layer (II) are laminated so as to be in contact with each other, the ultrafine fibers constituting the non-woven fabric layer (II) are more closely spaced between the fibers constituting the non-woven fabric layer (I). Evenly arranged. Thereby, the hole diameter of a laminated nonwoven fabric can be made uniform, the bubble point which means a maximum hole diameter becomes small, and favorable bacteria barrier property can be achieved. In some cases, the nonwoven fabric layer (II) may be two or more layers. On the other hand, if the average fiber diameter of the fibers constituting the nonwoven fabric layer (I) is 5 μm or more, the single yarn strength becomes strong, the laminated nonwoven fabric can achieve sufficient tensile and puncture strength, and the workability is also stable. . Therefore, the average fiber diameter of the nonwoven fabric constituting the nonwoven fabric layer (I) is more preferably 7 to 20 μm, still more preferably 9 to 18 μm.

不織布層(II)は、好ましくは平均繊維径0.1〜4μmを有する極細繊維で構成される。平均繊維径が4μm以下であれば、繊維間距離が大きくなり過ぎないため、微小孔径を達成することができ、良好な細菌バリア性を有することができる。他方、平均繊維径が0.1μm未満であると不織布は、基材の孔径が小さくなり過ぎ、通気性が悪くなる。4μmを超えると緻密性、孔径均一性が低くなりなり、細菌バリア性が著しく低下する。それゆえ、不織布層(II)を構成する繊維の平均繊維径は、より好ましくは0.3〜3μm、さらに好ましくは0.5〜2.5μmである。   The nonwoven fabric layer (II) is preferably composed of ultrafine fibers having an average fiber diameter of 0.1 to 4 μm. If the average fiber diameter is 4 μm or less, the distance between the fibers does not become too large, so that a micropore diameter can be achieved and good bacterial barrier properties can be achieved. On the other hand, if the average fiber diameter is less than 0.1 μm, the pore diameter of the base material becomes too small and the air permeability becomes poor. When it exceeds 4 μm, the density and the pore diameter uniformity are lowered, and the bacterial barrier property is remarkably lowered. Therefore, the average fiber diameter of the fibers constituting the nonwoven fabric layer (II) is more preferably 0.3 to 3 μm, still more preferably 0.5 to 2.5 μm.

本実施形態の滅菌用包装材料をより安定に製造するためには、2層の不織布層(I)の間に中間層として不織布層(I)が存在する3層の積層不織布が好ましい。積層不織布の両面が不織布層(I)であれば、加工時に不織布表面に外力が加わった際に、毛羽立ち、糸くずの発生を抑えることができ、また、生産時には、表面毛羽要因の不良を抑制することができ、ピール性を良好にすることが期待でき、滅菌用包装材料として良質な積層不織布を得ることができる。   In order to more stably manufacture the packaging material for sterilization of this embodiment, a three-layer laminated nonwoven fabric in which the nonwoven fabric layer (I) is present as an intermediate layer between the two nonwoven fabric layers (I) is preferable. If both sides of the laminated nonwoven fabric are the nonwoven fabric layer (I), generation of fluff and lint can be suppressed when external force is applied to the nonwoven fabric surface during processing. Also, during production, defects in surface fluff are suppressed. Therefore, it can be expected that the peelability is good, and a good quality laminated nonwoven fabric can be obtained as a packaging material for sterilization.

本実施形態の滅菌用包装材料を構成する合成樹脂繊維の不織布は、連続長繊維の不織布であることが好ましい。ここで、「長繊維」とは、繊維長が15mm以上であることをいう。連続長繊維は、短繊維と比べ糸が連続しており、単糸強度が強いため、不織布の強度が高く、生産工程も安定化する。短繊維を用いると、取り扱い中に繊維の脱落の恐れがあり、医療現場で異物として混入する可能性があるため、繊維の脱落の恐れがない長繊維を用いることが望ましい。   The non-woven fabric of synthetic resin fibers constituting the sterilization packaging material of this embodiment is preferably a continuous long-fiber non-woven fabric. Here, “long fiber” means that the fiber length is 15 mm or more. Continuous continuous fibers have continuous yarns compared to short fibers and have a high single yarn strength, so the strength of the nonwoven fabric is high and the production process is stabilized. When short fibers are used, the fibers may fall off during handling and may be mixed as a foreign substance at the medical site. Therefore, it is desirable to use long fibers that do not cause the fibers to fall off.

本実施形態の滅菌用包装材料を構成する合成樹脂繊維の不織布は、熱可塑性合成樹脂により構成されていることが好ましい。熱可塑性合成樹脂としては、例えば、ポリオレフィン系樹脂、ポリエステル系樹脂、ポリフェニレンサルファイド系樹脂を挙げることができ、具体的には、エチレン、プロピレン、1−ブテン、1−ヘキサン、4−メチル−1−ペンテン、1−オクテン等のα−オレフィンの単独若しくは共重合体である高圧法低密度ポリエチレン、線状低密度ポリエチレン(LLDPE)、高密度ポリエチレン、ポリプロピレン(プロピレン単独重合体)、ポリプロピレンランダム共重合体、ポリ1−ブテン、ポリ4−メチル−1−ペンテン、エチレン・プロピレンランダム共重合体のポリオレフィン、ポリエステル(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)が挙げられる。また、これらの樹脂を主体とする共重合体又は混合物も好ましく、特に、融点が140℃以上の樹脂で構成された不織布を用いることで、蒸気滅菌などの高温条件を要する滅菌処理にも耐えうるものとなる。それゆえ、ポリエステル系、若しくはポリプロピレンのポリマーがより好ましい。これらの樹脂を用いた場合、特に耐熱性が高く、病院内で頻繁に使用されている高圧蒸気滅菌処理では、従来よりも高温処理が可能とため、処理時間が軽減でき、効率的な滅菌処理が可能となる。また、極細繊維で構成される緻密な孔構造を維持することができ、滅菌処理後も効果的に細菌の侵入を防ぐことができる。また、鞘芯構造糸を構成する合成樹脂繊維も、上記の樹脂の組み合わせが好ましく、より好ましくは芯成分にポリエステル系、鞘成分にポリエステル系の共重合ポリマーを用いることで、高温の滅菌処理に対する耐性を損なわず、高い毛羽伏せを達成することができる。   It is preferable that the nonwoven fabric of the synthetic resin fiber which comprises the packaging material for sterilization of this embodiment is comprised with the thermoplastic synthetic resin. Examples of the thermoplastic synthetic resin include polyolefin resins, polyester resins, and polyphenylene sulfide resins. Specifically, ethylene, propylene, 1-butene, 1-hexane, 4-methyl-1- High-pressure low-density polyethylene, linear low-density polyethylene (LLDPE), high-density polyethylene, polypropylene (propylene homopolymer), polypropylene random copolymer, which is a homopolymer or copolymer of α-olefins such as pentene and 1-octene , Poly 1-butene, poly 4-methyl-1-pentene, polyolefin of ethylene / propylene random copolymer, polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate). A copolymer or a mixture mainly composed of these resins is also preferable, and in particular, by using a nonwoven fabric made of a resin having a melting point of 140 ° C. or higher, it can withstand sterilization treatment requiring high temperature conditions such as steam sterilization. It will be a thing. Therefore, polyester-based or polypropylene-based polymers are more preferable. When these resins are used, the high-pressure steam sterilization process, which has particularly high heat resistance and is frequently used in hospitals, can be processed at a higher temperature than before, so the processing time can be reduced and efficient sterilization process Is possible. In addition, a dense pore structure composed of ultrafine fibers can be maintained, and bacteria can be effectively prevented from entering after sterilization. In addition, the synthetic resin fiber constituting the sheath-core structured yarn is also preferably a combination of the above resins, and more preferably by using a polyester-based copolymer for the core component and a polyester-based copolymer polymer for the sheath component. High fluffiness can be achieved without impairing resistance.

前記した各不織布層の製造方法は限定されない。不織布層(I)の製法は、好ましくはスパンボンド法、乾式法、湿式法等であることができる。更に好ましくは、生産性の良さからスパンボンド法である。不織布層(II)の製法は、好ましくは極細繊維を用いた乾式法、湿式法等の製法、エレクトロスピニング法、メルトブロウン法等であることができる。更に好ましくは、極細不織布を容易に緻密に形成できることから、メルトブロウン法である。   The manufacturing method of each above-mentioned nonwoven fabric layer is not limited. The production method of the nonwoven fabric layer (I) can be preferably a spunbond method, a dry method, a wet method or the like. More preferred is the spunbond method because of good productivity. The production method of the non-woven fabric layer (II) is preferably a dry method using ultrafine fibers, a production method such as a wet method, an electrospinning method, a melt blown method, or the like. More preferably, the melt-blown method is used because an ultrafine nonwoven fabric can be easily and densely formed.

不織布層(I)と不織布層(II)の積層・一体化の方法としては、熱ボンデイングによるものが好ましい。熱ボンデイングによる熱的接合方法としては、カレンダー加工、高温の熱風による一体化(エアースルー方式)を挙げることができる。熱ボンデイングは、得られる積層不織布の引張、突刺しの強度と曲げ柔軟性とを維持でき、バインダーを用いることなく、複数の不織布層からなる積層不織布を形成することができ、不純物の混入を回避しなければならない医療用包装材料の製造において非常に好ましい方法である。特に好ましい熱的接合方法は、カレンダー加工である。カレンダー加工は、エンボスや梨地柄のような凹凸のある金属ロ−ル、また、平滑性を有するフラットロールを用いた熱ロールで圧着させる方法(熱圧着工程を含む方法)である。表面凹凸性のあるロールの表面柄は、繊維同士を結合できるものであれば特に限定しない。かかるカレンダー加工は、イージーピール性にも貢献する。熱接着工程は、熱可塑性樹脂(好ましくは、熱可塑性樹脂長繊維)の融点よりも50〜120℃低い温度で線圧100〜1000N/cmで行うことができる。熱接着工程における線圧が100N/cm未満であると、十分な強度を発現することは難しい。また、1000N/cmを超えると、見掛け密度が大きくなり平均流量孔径が小さくなり過ぎてしまい、必要な通気性が損なわれてしまう場合がある。   As a method for laminating and integrating the nonwoven fabric layer (I) and the nonwoven fabric layer (II), a method using thermal bonding is preferable. Examples of the thermal bonding method by thermal bonding include calendar processing and integration with high-temperature hot air (air-through method). Thermal bonding can maintain the tensile and piercing strength and bending flexibility of the resulting laminated nonwoven fabric, and can form a laminated nonwoven fabric consisting of multiple nonwoven fabric layers without using a binder, avoiding contamination by impurities This is a very preferred method in the production of medical packaging materials that must be done. A particularly preferable thermal bonding method is calendering. The calendering is a method (a method including a thermocompression bonding process) in which a metal roll having unevenness such as embossing or a satin pattern is pressed with a hot roll using a flat roll having smoothness. The surface pattern of the roll having surface irregularity is not particularly limited as long as the fibers can bond fibers. Such calendar processing also contributes to easy peelability. The thermal bonding step can be performed at a linear pressure of 100 to 1000 N / cm at a temperature 50 to 120 ° C. lower than the melting point of the thermoplastic resin (preferably, a thermoplastic resin long fiber). If the linear pressure in the thermal bonding step is less than 100 N / cm, it is difficult to develop sufficient strength. Moreover, when it exceeds 1000 N / cm, an apparent density will become large and an average flow hole diameter will become small too much, and required air permeability may be impaired.

本実施形態の滅菌用包装材料の平均流量孔径は0.1〜30μmであることが好ましく、より好ましくは0.3〜20μm、さらに好ましくは0.5〜15μmである。平均流量孔径が0.1μ未満では、繊維間隙が狭すぎるため、通気度が低下し、滅菌処理が包装材料内部まで浸透しない。他方、平均流量孔径が30μmを超えると、繊維間距離が大きくなり過ぎて、細菌バリア性が低下し、細菌類の侵入を許してしまい、滅菌状態の維持が困難となる。本実施形態の滅菌用包装材料のバブルポイントも同様に、0.5〜50μであることが好ましく、より好ましくは2.0〜40μm、更に好ましくは3.0〜30μmである。バブルポイントの値が平均流量孔径の値に近いことは、孔径均一性があることを意味する。本実施形態の滅菌用包装材料の目付は8.0〜100g/mであることが好ましく、より好ましくは10〜90g/m、更に好ましくは15〜80g/mである。目付が8g/m未満であると、引張、突刺し、の強度が不足し包装材料として加工することが困難であり、生産性等から不適合である。本実施形態の滅菌用包装材料の厚みは、0.03〜1.0mmであることが好ましく、より好ましくは0.05〜0.20mm、更に好ましくは0.08〜0.15である。厚みが0.03mm未満では積層体の密度が上昇し通気性が低下してしまう。他方、厚みが1.0mmを超えると、不織布層間の剥離強度が低下し、積層体を維持することが困難となる。 The average flow pore size of the packaging material for sterilization of this embodiment is preferably 0.1 to 30 μm, more preferably 0.3 to 20 μm, and still more preferably 0.5 to 15 μm. When the average flow pore size is less than 0.1 μm, the fiber gap is too narrow, the air permeability is lowered, and the sterilization treatment does not penetrate into the packaging material. On the other hand, when the average flow pore diameter exceeds 30 μm, the interfiber distance becomes too large, the bacterial barrier property is lowered, and the invasion of bacteria is allowed, making it difficult to maintain a sterilized state. Similarly, the bubble point of the packaging material for sterilization of this embodiment is preferably 0.5 to 50 μm, more preferably 2.0 to 40 μm, and further preferably 3.0 to 30 μm. When the value of the bubble point is close to the value of the average flow pore size, it means that the pore size is uniform. Basis weight of the sterilization packaging material according to the present embodiment is preferably from 8.0~100g / m 2, more preferably 10~90g / m 2, more preferably from 15 to 80 g / m 2. If the basis weight is less than 8 g / m 2 , the strength of tension and puncture is insufficient, and it is difficult to process as a packaging material, which is incompatible with productivity. The thickness of the packaging material for sterilization of this embodiment is preferably 0.03 to 1.0 mm, more preferably 0.05 to 0.20 mm, and still more preferably 0.08 to 0.15. If the thickness is less than 0.03 mm, the density of the laminate increases and the air permeability decreases. On the other hand, if the thickness exceeds 1.0 mm, the peel strength between the nonwoven fabric layers decreases, and it becomes difficult to maintain the laminate.

本実施形態の滅菌用包装材料の引張強度は10〜300N/25mm巾であることが好ましく、より好ましくは10〜280N/25mm巾、更に好ましくは15〜260N/25mm巾である。引張強度が10N/25mm巾未満であると、生産工程において、加工工程における張力に耐えることができず、包装材料にした際も容易に変形が起きてしまい、滅菌包材として機能しない。他方、引張強度が300N/25mm巾を超えると、滅菌包材のはりが有りすぎてハンドリング性が悪く、滅菌包材として機能しない。
引張強度と同様の理由により、本実施形態の滅菌用包装材料の突き刺し強度は、70〜700Nの範囲が好ましく、より好ましくは15〜650N、更に好ましくは20〜600Nである。
The tensile strength of the sterilization packaging material of the present embodiment is preferably 10 to 300 N / 25 mm width, more preferably 10 to 280 N / 25 mm width, and still more preferably 15 to 260 N / 25 mm width. If the tensile strength is less than 10 N / 25 mm width, the production process cannot withstand the tension in the processing process, and when it is used as a packaging material, it easily deforms and does not function as a sterile packaging material. On the other hand, if the tensile strength exceeds 300 N / 25 mm width, the sterilization packaging material has too much beam and the handling property is poor, and the sterilization packaging material does not function.
For the same reason as the tensile strength, the puncture strength of the sterilization packaging material of this embodiment is preferably in the range of 70 to 700N, more preferably 15 to 650N, and still more preferably 20 to 600N.

以下、実施例を挙げて本発明を具体的に説明するが、本発明はこれらの実施例に限定されるものではない。
(1)毛羽等級
JIS L 0849の摩擦堅牢度試験に準じて、下記の測定法を案出して用いた。
積層不織布試料の両端部10cmを除いて、布幅20cmあたり機械方向に長さ300mm、幅25mmの試験片を採取した。日本学術振興会堅牢度試験機を用いて、摩擦子の荷重を200gとし、摩擦子側にも、摩擦子との間に綿布を挟んだ上で採取した試験片を取り付けて、積層不織布の表面同士を機械方向に30回動作(往復)させて擦り、各々の試験片の被摩擦面を以下の基準で耐毛羽性を等級づけ、等級値の平均値を求めて、不織布の毛羽等級とした。実施例においては幅方向に5点の試験片を採取し測定、その平均値を毛羽等級とした:
1級:試験片が破損するほど繊維が剥ぎ取られる。
2級:試験片が薄くなるほど甚だしく繊維が剥ぎ取られている。
2.5級:毛玉が大きくはっきり見られ、複数個所で繊維が浮き上がり始める。
3級:小さな毛玉が見られる。
3.5級:毛玉はできないが、毛羽立ちが見られる。
4級:毛羽立ちがない。
EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited to these Examples.
(1) Fluff grade In accordance with the friction fastness test of JIS L 0849, the following measurement method was devised and used.
A test piece having a length of 300 mm and a width of 25 mm in the machine direction was collected per 20 cm of cloth width except for 10 cm at both ends of the laminated nonwoven fabric sample. Using the Japan Society for the Promotion of Science fastness tester, the load of the friction element is set to 200 g, and a test piece collected on the friction element side with a cotton cloth sandwiched between the friction elements is attached to the surface of the laminated nonwoven fabric. Rub each other 30 times (reciprocating) in the machine direction, and rub the surface of each test piece according to the following criteria, and classify the fluff resistance according to the following criteria. . In the examples, 5 test specimens were collected in the width direction and measured, and the average value was defined as the fluff rating:
First grade: The fiber is peeled off as the specimen is broken.
Second grade: As the specimen becomes thinner, the fibers are severely peeled off.
Grade 2.5: The pills are large and clearly visible, and the fibers begin to float up at multiple locations.
Third grade: A small pill is seen.
Grade 3.5: Fluff is not possible, but fuzz is observed.
Grade 4: No fuzz.

(2)大気塵捕集効率
測定面積78.5cm(直径10cm)、風速23.0L/minとして、不織布を通過する前後の大気を捕集し、捕集大気中の粒径(粒子を球形と仮定した場合の有効直径)1μm以上の粒子(塵埃)をパーテクルカウンター(リオン製)で測定し、下記式:
大気塵捕集効率(%)=[1−(下流粒子数/上流粒子数)]×100
により求めた。尚、粒径は、上記パーテクルカウンター(リオン製)により自動で算出される。
(2) Atmospheric dust collection efficiency Assuming a measurement area of 78.5 cm 2 (diameter 10 cm) and a wind speed of 23.0 L / min, the atmosphere before and after passing through the nonwoven fabric is collected, and the particle size in the collected atmosphere (the particles are spherical) (Effective diameter when assumed) and particles (dust) of 1 μm or more are measured with a pertcle counter (manufactured by Rion).
Atmospheric dust collection efficiency (%) = [1− (number of downstream particles / number of upstream particles)] × 100
Determined by Incidentally, the particle diameter is automatically calculated by the above-mentioned particle counter (manufactured by Lion).

(3)ガーレ型通気度(秒/100ml)
ガーレ式デンソメータ(株式会社安田精機製作所製、“B”type)を用いて100mlの空気の透過時間(単位;s/100ml)を室温で測定した。一つの不織布サンプルに対して種々の異なる位置について5点の測定を行い、その平均値を通気度とした。
(3) Gurley type air permeability (sec / 100ml)
The permeation time (unit: s / 100 ml) of 100 ml of air was measured at room temperature using a Gurley type densometer (manufactured by Yasuda Seiki Seisakusho, “B” type). Five points were measured at various different positions for one nonwoven fabric sample, and the average value was taken as the air permeability.

(4)極細繊維の平均繊維径(μm)
織布を10cm×10cmにカットし、上下60℃の鉄板に0.30MPaの圧力で90秒間プレスした後、不織布を白金で蒸着した。SEM装置(JSM−6510 日本電子株式会社製)を用いて、加速度電圧15kV、ワーキングディスタンス21mmの条件で撮影した。撮影倍率は、平均繊維径が0.5μm未満の糸は10000倍、平均繊維径が0.5以上1.5μm未満の糸は6000倍、平均繊維径が1.5μm以上の糸は4000倍とした。それぞれの撮影倍率での撮影視野は、10000倍では12.7μm×9.3μm、6000倍では21.1μm×15.9μm、4000倍では31.7μm×23.9μmとした。ランダムに繊維100本以上を撮影し、全ての繊維径を撮影した。但し、糸長方向で融着している繊維同氏は測長対象から除いた。以下の式:
Dw=ΣWi・Di=Σ(Ni・Di)/Σ(Ni・Di)
{式中、Wi=繊維径Diの重量分率=Ni・Di/ΣNi・Diであり、Niは繊維径Diの繊維数である。}により求めた重量平均繊維径(Dw)を、平均繊維径とした。
(4) Average fiber diameter of microfiber (μm)
The woven fabric was cut into 10 cm × 10 cm, pressed onto a 60 ° C. iron plate at a pressure of 0.30 MPa for 90 seconds, and then the nonwoven fabric was vapor-deposited with platinum. Using a SEM device (JSM-6510, manufactured by JEOL Ltd.), images were taken under conditions of an acceleration voltage of 15 kV and a working distance of 21 mm. The photographing magnification is 10,000 times for yarns having an average fiber diameter of less than 0.5 μm, 6000 times for yarns having an average fiber diameter of 0.5 to less than 1.5 μm, and 4000 times for yarns having an average fiber diameter of 1.5 μm or more. did. The field of view at each magnification was 12.7 μm × 9.3 μm at 10,000 ×, 21.1 μm × 15.9 μm at 6000 ×, and 31.7 μm × 23.9 μm at 4000 ×. 100 or more fibers were randomly photographed and all fiber diameters were photographed. However, the same fiber fused in the yarn length direction was excluded from the target for length measurement. The following formula:
Dw = ΣWi · Di = Σ (Ni · Di 2 ) / Σ (Ni · Di)
{Wherein Wi = weight fraction of fiber diameter Di = Ni · Di / ΣNi · Di, where Ni is the number of fibers of fiber diameter Di. } Was determined as the average fiber diameter.

(5)不織布の平均流量孔径、及びバブルポイント
測定装置として、PMI社製のパームポロメーター(型式:CFP−1200AEX)を用いた。本測定装置は、不織布を試料として、予め表面張力が既知の浸液に不織布を浸し、不織布の全ての細孔を浸液の膜で覆った状態から不織布に圧力をかけ、浸液の液膜が破壊される圧力と浸液の表面張力とから計算される細孔の孔径を測定するものである。浸液としてPMI社製のシルウィックを用い、不織布を浸液に浸して充分に脱気した後、以下の式:
d=C・r/P
{式中、d(単位:μm)はフィルターの孔径であり、r(単位:N/m)は浸液の表面張力であり、P(単位:Pa)はその孔径の液膜が破壊される圧力であり、そしてCは浸液の濡れ張力、接触角などにより定まる定数である。}により、d(μm)として、平均流量孔径、及びバブルポイントを求めた。
(5) Average flow pore diameter of nonwoven fabric and bubble point As a measuring device, a palm porometer (model: CFP-1200AEX) manufactured by PMI was used. This measuring device uses a non-woven fabric as a sample, immerses the non-woven fabric in an immersion liquid with a known surface tension in advance, and applies pressure to the non-woven fabric after covering all the pores of the non-woven fabric with the immersion liquid film. The pore diameter calculated from the pressure at which the liquid is destroyed and the surface tension of the immersion liquid is measured. Using SILWICK made by PMI as the immersion liquid, the nonwoven fabric was immersed in the immersion liquid and sufficiently deaerated, and then the following formula:
d = C · r / P
{Wherein d (unit: μm) is the pore diameter of the filter, r (unit: N / m) is the surface tension of the immersion liquid, and P (unit: Pa) is the liquid film having the pore diameter destroyed. Pressure, and C is a constant determined by the wetting tension, contact angle, etc. of the immersion liquid. }, The average flow pore size and bubble point were determined as d (μm).

(6)目付(g/m
JIS L−1906に規定の方法に従い、縦20cm×横25cmの試験片を試料の幅方向1m当たり3箇所の、計1m×1m当たり9箇所採取して質量を測定し、その平均値を単位面積当たりの質量に換算して求めた。
(6) Weight per unit area (g / m 2 )
In accordance with the method specified in JIS L-1906, a sample of 20 cm in length x 25 cm in width is sampled at 3 locations per 1 m in the width direction of the sample, a total of 9 locations per 1 m × 1 m, and the mass is measured. It calculated | required in conversion to the mass per hit.

(7)厚み(mm)
JIS L−1906に規定の方法に従い、巾1m当たり10箇所の厚みを測定し、その平均値を求めた。
(7) Thickness (mm)
In accordance with the method defined in JIS L-1906, 10 thicknesses were measured per 1 m width, and the average value was obtained.

(8)引張強度(N/25mm)
JIS 8113に規定の方法に従い、不織布の各端部10cmを除き、幅25mm×長さ200mmの試験片をつかみ具間の距離が100mmになるように固定し、クロスヘッドスピード20mm/分で測定した。不織布の幅方向1mにつきそれぞれ5箇所採取した。試験片が破断するまで荷重を加え、機械方向(MD)及び幅方向(CD)の試験片の最大荷重時の強さの平均値を引張強度とした。
(8) Tensile strength (N / 25mm)
According to the method specified in JIS 8113, a test piece having a width of 25 mm and a length of 200 mm was fixed so that the distance between the grips was 100 mm except for each end 10 cm of the nonwoven fabric, and the crosshead speed was measured at 20 mm / min. . Five locations were collected for each 1 m of the nonwoven fabric in the width direction. The load was applied until the test piece broke, and the average value of the strength at the maximum load of the test piece in the machine direction (MD) and the width direction (CD) was taken as the tensile strength.

(9)突刺強度(N)
卓上型精密万能機(島津製作所社製のAGS−1000D型)に、直径φ25mm、先端の半径12.5mmの針を装着し、温度23±2℃、針の移動速度50mm/分で突刺試験を行った。一つの不織布サンプルに対して種々の異なる位置について5点の測定を行い、その平均値を突刺強度とした。
(9) Puncture strength (N)
A desktop precision all-purpose machine (AGS-1000D manufactured by Shimadzu Corporation) is equipped with a needle with a diameter of 25 mm and a tip radius of 12.5 mm, and a puncture test is performed at a temperature of 23 ± 2 ° C. and a needle moving speed of 50 mm / min. went. Five points were measured at various different positions on one nonwoven fabric sample, and the average value was defined as the puncture strength.

[実施例1〜12]
PET樹脂とCO−PET樹脂を用い、スパンボンド法により、紡糸温度300℃でフィラメントの長繊維群を、移動する捕集ネット上に向けて押し出し、紡糸速度4500m/分で紡糸し、コロナ帯電で3μC/g程度帯電させて十分に開繊をさせ、熱可塑性樹脂長繊維ウェブを捕集ネット上で、2成分繊維の不織布を作製した。前記で作製したSB不織布の上に以下のメルトブロウン法によりウェブを吹き付けた。繊維素材としてPET樹脂用い、紡口ノズル径0.30mmの紡口ノズルから、押出機で溶融されたPET樹脂を押し出した。押出機におけるPET樹脂の溶融温度、紡糸ガス温度、溶融樹脂の単孔吐出量などを適宜選択し、熱可塑性樹脂を牽引細化させた。さらにそのMB不織布の上に前記したものと同じSB紡糸繊維を吹き付けることでSB−MB−SB積層不織布を作製した。その後、得られたウェブを適宜カレンダー加工して、所望の厚みに調整し滅菌用包装材料を得た。
[Examples 1 to 12]
Using PET resin and CO-PET resin, the long fiber group of filaments is extruded onto a moving collection net at a spinning temperature of 300 ° C., spun at a spinning speed of 4500 m / min. About 3 μC / g was charged to sufficiently open the fiber, and a thermoplastic resin long fiber web was formed on a collection net to prepare a two-component fiber nonwoven fabric. A web was sprayed on the SB nonwoven fabric prepared above by the following melt-blown method. PET resin was used as a fiber material, and the PET resin melted by an extruder was extruded from a nozzle having a nozzle diameter of 0.30 mm. The thermoplastic resin was pulled and thinned by appropriately selecting the melting temperature of the PET resin in the extruder, the spinning gas temperature, the single-hole discharge amount of the molten resin, and the like. Further, an SB-MB-SB laminated nonwoven fabric was produced by spraying the same SB spun fiber as described above on the MB nonwoven fabric. Thereafter, the obtained web was appropriately calendered and adjusted to a desired thickness to obtain a packaging material for sterilization.

[実施例13]
ポリプロピレン樹脂とポリエチレン樹脂を用い、スパンボンド法により、紡糸温度230℃でフィラメントの長繊維群を、移動する捕集ネット上に向けて押し出し、紡糸速度4500m/分で紡糸し、コロナ帯電で3μC/g程度帯電させて十分に開繊をさせ、熱可塑性樹脂長繊維ウェブを捕集ネット上で、2成分繊維の不織布を作製した。その他は、実施例1と同様であった。
[Example 13]
Using a polypropylene resin and a polyethylene resin, a long fiber group of filaments is extruded onto a moving collection net at a spinning temperature of 230 ° C. by a spunbond method, spun at a spinning speed of 4500 m / min, and 3 μC / The fiber was sufficiently opened by being charged about g, and a nonwoven fabric of two-component fibers was produced on the collection net of the thermoplastic resin long fiber web. Others were the same as in Example 1.

[比較例1、2]
PET樹脂を用い、スパンボンド法により、紡糸温度300℃でフィラメントの長繊維群を、移動する捕集ネット上に向けて押し出し、紡糸速度4500m/分で紡糸し、コロナ帯電で3μC/g帯電させて十分に開繊をさせ、熱可塑性樹脂長繊維ウェブを捕集ネット上で、1成分繊維の不織布を作製した。前記で作製したSB不織布の上に以下のMB法によりウェブを吹き付けた。繊維素材としてPET樹脂用い、紡口ノズル径0.30mmの紡口ノズルから、押出機で溶融されたPET樹脂を押し出した。押出機におけるPET樹脂の溶融温度、紡糸ガス温度、溶融樹脂の単孔吐出量などを適宜選択し、熱可塑性樹脂を牽引細化させた。さらにそのMB不織布の上に前記したものと同じSB紡糸繊維を吹き付けることでSB−MB−SB積層不織布を作製した。その後得られたウェブをカレンダー加工して滅菌用包装材料を得た。
[Comparative Examples 1 and 2]
Using a PET resin, a filament long fiber group is extruded onto a moving collection net at a spinning temperature of 300 ° C., spun at a spinning speed of 4500 m / min, and charged at 3 μC / g by corona charging. The fiber was fully opened to produce a nonwoven fabric of monocomponent fibers on the collection net of the thermoplastic resin long fiber web. A web was sprayed on the SB nonwoven fabric produced above by the following MB method. PET resin was used as a fiber material, and the PET resin melted by an extruder was extruded from a nozzle having a nozzle diameter of 0.30 mm. The thermoplastic resin was pulled and thinned by appropriately selecting the melting temperature of the PET resin in the extruder, the spinning gas temperature, the single-hole discharge amount of the molten resin, and the like. Further, an SB-MB-SB laminated nonwoven fabric was produced by spraying the same SB spun fiber as described above on the MB nonwoven fabric. Thereafter, the obtained web was calendered to obtain a packaging material for sterilization.

[比較例3]
HOGY社製のメッキンバッグHM−1104(235mm×60mm×100m)に使用されている滅菌紙を、フィルムと切り離し用いた。
[Comparative Example 3]
The sterilized paper used in the plating bag HM-1104 (235 mm × 60 mm × 100 m) manufactured by HOGY was used separately from the film.

実施例1〜13、比較例1〜3の不織布構造、及び得られた不織布の各種特性を以下の表1に示す。

Figure 2019206351
The nonwoven fabric structures of Examples 1 to 13 and Comparative Examples 1 to 3 and various properties of the obtained nonwoven fabric are shown in Table 1 below.
Figure 2019206351

本発明に係る積層不織布は、高い毛羽伏せ性(耐表面摩耗性)、高バリア性、高通気性を有するため、医療分野に使用されるゾンデ、メス、ピンセット、ハサミ等の、感染症の防止のための滅菌用包装材料として好適に利用可能である。   The laminated non-woven fabric according to the present invention has high fluffiness (surface abrasion resistance), high barrier properties, and high air permeability, and therefore prevents infections such as sondes, scalpels, tweezers and scissors used in the medical field. It can be suitably used as a packaging material for sterilization.

Claims (11)

鞘部の樹脂の融点が芯部の樹脂の融点よりも低い鞘芯構造糸を表層に配した合成樹脂繊維の不織布からなる滅菌用包装材料。   A sterilization packaging material comprising a synthetic resin fiber non-woven fabric in which a sheath core-structured yarn having a melting point of the resin of the sheath part lower than the melting point of the resin of the core part is arranged on the surface layer. 前記鞘芯構造糸を配した表層の毛羽等級が3級以上である、請求項1に記載の滅菌用包装材料。   The sterilization packaging material according to claim 1, wherein the fluff grade of the surface layer on which the sheath core structure yarn is arranged is grade 3 or higher. 粒径1μm以上の粒子の大気塵捕集効率が80%以上である、請求項1又は2に記載の滅菌用包装材料。   The packaging material for sterilization according to claim 1 or 2, wherein air dust collection efficiency of particles having a particle size of 1 µm or more is 80% or more. ガーレ型通気度試験において100mlの空気が通過する時間から得られる通気度100秒/100ml以下である、請求項1〜3のいずれか1項に記載の滅菌用包装材料。   The packaging material for sterilization according to any one of claims 1 to 3, which has an air permeability of 100 seconds / 100 ml or less obtained from a time during which 100 ml of air passes in a Gurley type air permeability test. 前記合成繊維不織布が、平均繊維径5〜30μmの繊維からなる不織布層(I)と平均繊維径0.1〜4μmの繊維からなる不織布層(II)から構成される積層不織布である、請求項1〜4のいずれか1項に記載の滅菌用包装材料。   The said synthetic fiber nonwoven fabric is a laminated nonwoven fabric comprised from the nonwoven fabric layer (I) which consists of a fiber with an average fiber diameter of 5-30 micrometers, and the nonwoven fabric layer (II) which consists of a fiber with an average fiber diameter of 0.1-4 micrometers. The packaging material for sterilization of any one of 1-4. 前記積層不織布は、2つの前記不織布層(I)の間に中間層として前記不織布層(II)を有するものである、請求項5に記載の滅菌用包装材料。   The said laminated nonwoven fabric is a packaging material for sterilization of Claim 5 which has the said nonwoven fabric layer (II) as an intermediate | middle layer between two said nonwoven fabric layers (I). 前記積層不織布の平均流量孔径が0.1〜30μmであり、かつ、バブルポイントが0.5〜50μである、請求項5又は6に記載の滅菌用包装材料。   The packaging material for sterilization according to claim 5 or 6, wherein the laminated nonwoven fabric has an average flow pore size of 0.1 to 30 µm and a bubble point of 0.5 to 50 µm. 前記積層不織布の目付が8.0〜100g/m、であり、かつ、厚みが0.03〜1.0mmである、請求項5〜7のいずれか1項に記載の滅菌用包装材料。 The basis weight of the laminated nonwoven fabric is 8.0~100g / m 2,, and a thickness of 0.03~1.0Mm, sterilization packaging material according to any one of claims 5-7. 前記積層不織布の引張強度が10〜300N/25mm巾であり、かつ、突き刺し強度が70〜700Nである、請求項5〜8のいずれか1項に記載の滅菌用包装材料。   The sterilization packaging material according to any one of claims 5 to 8, wherein the laminated nonwoven fabric has a tensile strength of 10 to 300 N / 25 mm width and a puncture strength of 70 to 700 N. 前記合成樹脂繊維は連続長繊維である、請求項1〜9のいずれか1項に記載の滅菌用包装材料。   The packaging material for sterilization according to any one of claims 1 to 9, wherein the synthetic resin fiber is a continuous long fiber. 前記合成樹脂繊維不織布が、カレンダー加工を施されたものである、請求項1〜10のいずれか1項に記載の滅菌用包装材料。   The packaging material for sterilization according to any one of claims 1 to 10, wherein the synthetic resin fiber nonwoven fabric is calendered.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024075655A1 (en) * 2022-10-05 2024-04-11 王子ホールディングス株式会社 Heat seal sheet and sterilized package
US12017442B2 (en) 2019-03-22 2024-06-25 Mitsui Chemicals Asahi Life Materials Co., Ltd. Nonwoven fabric for sterilization packaging material
WO2025182583A1 (en) * 2024-02-29 2025-09-04 王子ホールディングス株式会社 Heat-seal sheet, method for manufacturing same, and sterile packaging
WO2025254024A1 (en) * 2024-06-04 2025-12-11 東レ株式会社 Laminated nonwoven fabric, method for producing same, and sterilized packaging material

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05138786A (en) * 1991-11-21 1993-06-08 Unitika Ltd Laminated sheet and production thereof
US5804512A (en) * 1995-06-07 1998-09-08 Bba Nonwovens Simpsonville, Inc. Nonwoven laminate fabrics and processes of making same
JP2004523664A (en) * 2000-10-13 2004-08-05 キンバリー クラーク ワールドワイド インコーポレイテッド Self-heat-sealable packaging and method of manufacturing the packaging
JP2006528735A (en) * 2003-07-24 2006-12-21 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー Multi-component spunbond web
JP2007514073A (en) * 2003-12-15 2007-05-31 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー Fully bonded multicomponent melt-spun nonwoven web
JP2015076416A (en) * 2013-10-04 2015-04-20 旭化成せんい株式会社 Nonwoven cloth, separator using the same, and solid electrolytic capacitor
WO2017146050A1 (en) * 2016-02-25 2017-08-31 旭化成株式会社 Packaging material for sterilization

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05138786A (en) * 1991-11-21 1993-06-08 Unitika Ltd Laminated sheet and production thereof
US5804512A (en) * 1995-06-07 1998-09-08 Bba Nonwovens Simpsonville, Inc. Nonwoven laminate fabrics and processes of making same
JP2004523664A (en) * 2000-10-13 2004-08-05 キンバリー クラーク ワールドワイド インコーポレイテッド Self-heat-sealable packaging and method of manufacturing the packaging
JP2006528735A (en) * 2003-07-24 2006-12-21 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー Multi-component spunbond web
JP2007514073A (en) * 2003-12-15 2007-05-31 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー Fully bonded multicomponent melt-spun nonwoven web
JP2015076416A (en) * 2013-10-04 2015-04-20 旭化成せんい株式会社 Nonwoven cloth, separator using the same, and solid electrolytic capacitor
WO2017146050A1 (en) * 2016-02-25 2017-08-31 旭化成株式会社 Packaging material for sterilization

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US12017442B2 (en) 2019-03-22 2024-06-25 Mitsui Chemicals Asahi Life Materials Co., Ltd. Nonwoven fabric for sterilization packaging material
WO2024075655A1 (en) * 2022-10-05 2024-04-11 王子ホールディングス株式会社 Heat seal sheet and sterilized package
WO2025182583A1 (en) * 2024-02-29 2025-09-04 王子ホールディングス株式会社 Heat-seal sheet, method for manufacturing same, and sterile packaging
WO2025254024A1 (en) * 2024-06-04 2025-12-11 東レ株式会社 Laminated nonwoven fabric, method for producing same, and sterilized packaging material

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