JP2002242068A - Nonwoven fabric for biodegradable sanitary material - Google Patents
Nonwoven fabric for biodegradable sanitary materialInfo
- Publication number
- JP2002242068A JP2002242068A JP2001041060A JP2001041060A JP2002242068A JP 2002242068 A JP2002242068 A JP 2002242068A JP 2001041060 A JP2001041060 A JP 2001041060A JP 2001041060 A JP2001041060 A JP 2001041060A JP 2002242068 A JP2002242068 A JP 2002242068A
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- biodegradable
- polylactic acid
- acid
- fiber
- 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.)
- Pending
Links
- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 88
- 239000000463 material Substances 0.000 title claims abstract description 47
- 239000000835 fiber Substances 0.000 claims abstract description 65
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 32
- 239000004626 polylactic acid Substances 0.000 claims abstract description 32
- 230000035699 permeability Effects 0.000 claims abstract description 14
- 229920000642 polymer Polymers 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 12
- JVTAAEKCZFNVCJ-REOHCLBHSA-N L-lactic acid Chemical compound C[C@H](O)C(O)=O JVTAAEKCZFNVCJ-REOHCLBHSA-N 0.000 claims description 10
- 238000009264 composting Methods 0.000 claims description 8
- 229920001577 copolymer Polymers 0.000 claims description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 6
- 238000000354 decomposition reaction Methods 0.000 claims description 6
- 229930182843 D-Lactic acid Natural products 0.000 claims description 5
- JVTAAEKCZFNVCJ-UWTATZPHSA-N D-lactic acid Chemical compound C[C@@H](O)C(O)=O JVTAAEKCZFNVCJ-UWTATZPHSA-N 0.000 claims description 5
- 229940022769 d- lactic acid Drugs 0.000 claims description 5
- 239000003484 crystal nucleating agent Substances 0.000 claims description 4
- 229920000118 poly(D-lactic acid) Polymers 0.000 claims description 2
- 229920001432 poly(L-lactide) Polymers 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 239000000470 constituent Substances 0.000 description 10
- 238000009987 spinning Methods 0.000 description 9
- 238000006065 biodegradation reaction Methods 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- 230000004927 fusion Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000004049 embossing Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000010839 body fluid Substances 0.000 description 2
- 210000001124 body fluid Anatomy 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000010800 human waste Substances 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002667 nucleating agent Substances 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000011345 viscous material Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- RGMMREBHCYXQMA-UHFFFAOYSA-N 2-hydroxyheptanoic acid Chemical compound CCCCCC(O)C(O)=O RGMMREBHCYXQMA-UHFFFAOYSA-N 0.000 description 1
- NYHNVHGFPZAZGA-UHFFFAOYSA-N 2-hydroxyhexanoic acid Chemical compound CCCCC(O)C(O)=O NYHNVHGFPZAZGA-UHFFFAOYSA-N 0.000 description 1
- JKRDADVRIYVCCY-UHFFFAOYSA-N 2-hydroxyoctanoic acid Chemical compound CCCCCCC(O)C(O)=O JKRDADVRIYVCCY-UHFFFAOYSA-N 0.000 description 1
- JRHWHSJDIILJAT-UHFFFAOYSA-N 2-hydroxypentanoic acid Chemical compound CCCC(O)C(O)=O JRHWHSJDIILJAT-UHFFFAOYSA-N 0.000 description 1
- SJZRECIVHVDYJC-UHFFFAOYSA-N 4-hydroxybutyric acid Chemical compound OCCCC(O)=O SJZRECIVHVDYJC-UHFFFAOYSA-N 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000006224 matting agent Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Orthopedics, Nursing, And Contraception (AREA)
- Biological Depolymerization Polymers (AREA)
- Artificial Filaments (AREA)
- Nonwoven Fabrics (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、柔軟性や強力に優
れ、かつ使用後にコンポスト化処理の可能な生分解性衛
生材用不織布に関し、特に、使い捨ておむつ、生理用品
などのトップシートとして最適に用いられる衛生材用不
織布に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nonwoven fabric for biodegradable sanitary materials which is excellent in flexibility and strength and which can be composted after use, and is particularly suitable as a topsheet for disposable diapers and sanitary articles. The present invention relates to a nonwoven fabric for a sanitary material used.
【０００２】[0002]
【従来の技術】従来から、使い捨ておむつ、生理用品な
どに代表される衛生材のトップシートとして種々の不織
布が使われており、なかでもスパンボンド法によって得
られる長繊維不織布は、比較的低目付であっても実用に
耐え得るだけの強力を有し、かつ、柔軟性をも持ち合わ
せているため、重要な材料として認識されている。現
在、主に、ポリプロピレンからなる長繊維不織布が衛生
材のトップシートとして用いられている。2. Description of the Related Art Conventionally, various nonwoven fabrics have been used as top sheets of sanitary materials typified by disposable diapers and sanitary products. Among them, long-fiber nonwoven fabrics obtained by a spunbond method have a relatively low basis weight. However, it is recognized as an important material because it has strength enough to withstand practical use and also has flexibility. At present, long-fiber nonwoven fabrics mainly made of polypropylene are used as top sheets of sanitary materials.
【０００３】衛生材の分野では、ほとんとすべての物が
使い捨てられており、衛生材に用いられた不織布も例外
ではなく、例えば、使用済みのおむつとなどは、生ゴミ
として焼却処分するのが一般的である。[0003] In the field of sanitary materials, almost all items are disposable, and nonwoven fabrics used for sanitary materials are no exception. For example, used diapers and the like are incinerated as garbage. General.
【０００４】しかし、使用済みのおむつなどのように水
分を含んだ生ゴミでは、焼却処理を行うと燃焼温度が低
下してダイオキシン等の有害ガスが発生することから、
近年の環境保護意識の高まりにより有機物循環型といえ
るコンポスト化のニーズが高まっている。[0004] However, in the case of garbage containing moisture, such as used diapers, the burning temperature is reduced by incineration, and harmful gases such as dioxin are generated.
In recent years, the need for composting, which can be regarded as an organic matter recycling type, has been increasing due to the increasing awareness of environmental protection.
【０００５】ところが、トップシートとして非生分解性
の合成樹脂からなる不織布を用いた衛生材の場合には、
コンポスト化処理装置に投入すると、屎尿などは腐敗・
分解の過程を経るものの不織布は堆肥化しないでそのま
ま残ってしまうため、やはり焼却あるいはそのまま埋め
立てる以外に廃棄方法がないという問題点があった。However, in the case of a sanitary material using a nonwoven fabric made of a non-biodegradable synthetic resin as a top sheet,
When put into composting equipment, human waste etc.
The nonwoven fabric is left as it is without composting, though it undergoes the decomposition process, so there is a problem that there is no disposal method other than incineration or landfill.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、前記問題点
を解決し、強力に優れ、柔軟性に富み、しかも生分解性
を兼ね備えた衛生材用不織布を提供するものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and provides a nonwoven fabric for sanitary materials which is strong, excellent in flexibility and biodegradable.
【０００７】[0007]
【課題を解決するための手段】本発明者らは前記課題を
解決するために鋭意検討した結果、本発明に到達した。
すなわち本発明は、ポリ乳酸系長繊維からなる生分解性
不織布であって、前記ポリ乳酸系長繊維の単糸繊度が
１．５〜３．５デシテックスで、前記生分解性不織布の
目付が１５〜３０ｇ／ｍ2の範囲で、かつ４００〜１４
００ｃｍ3／ｃｍ2／秒の通気度を有することを特徴とす
る生分解性衛生材用不織布を要旨とするものである。Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention.
That is, the present invention relates to a biodegradable nonwoven fabric comprising polylactic acid-based long fibers, wherein the polylactic acid-based long fibers have a single-fiber fineness of 1.5 to 3.5 decitex and a basis weight of the biodegradable nonwoven fabric of 15 ３０30 g / m 2 , and 400〜14
A nonwoven fabric for a biodegradable sanitary material characterized by having an air permeability of 00 cm 3 / cm 2 / sec.
【０００８】[0008]
【発明の実施の形態】本発明における生分解性衛生材用
不織布は、生分解性を有するポリ乳酸系長繊維にて形成
された不織布である必要がある。このような生分解性の
繊維を用いることで、一定期間が経過した後の衛生材用
不織布は加水分解及び微生物分解によりほぼ完全に分解
されるため、例えば、使い捨ておむつや生理用品などの
トップシートとして用いた場合にも、使用後には吸収し
た屎尿や血液、生分解性吸収剤（パルプなど）と共にコ
ンポスト化処理装置に投入することが可能となり、焼却
のように有毒ガスを発生して自然環境を汚染することが
なくなる。コンポスト化処理装置内で処理された不織布
は、最終的には水や二酸化炭素といった自然環境を汚染
しない化合物に分解される。BEST MODE FOR CARRYING OUT THE INVENTION The nonwoven fabric for a biodegradable sanitary material in the present invention needs to be a nonwoven fabric formed of biodegradable polylactic acid-based long fibers. By using such biodegradable fibers, the nonwoven fabric for sanitary materials after a certain period of time is almost completely decomposed by hydrolysis and microbial decomposition, for example, a top sheet such as disposable diapers and sanitary products Even after use, it can be put into composting equipment together with absorbed human waste, blood, and biodegradable absorbents (such as pulp) after use, generating toxic gas like incineration, and Will not be contaminated. The nonwoven fabric treated in the composting treatment device is finally decomposed into compounds that do not pollute the natural environment, such as water and carbon dioxide.
【０００９】ポリ乳酸系長繊維の単糸繊度は、１．５〜
３．５デシテックスである必要がある。単糸繊度が１．
５デシテックス未満であると、得られる不織布の単位面
積当たりの構成繊維の本数が増え、構成繊維間の空間が
小さくなり、液体の透過が遅くなるため、衛生材として
着用時に不快に感じる。また、単糸の強力が弱くなるた
め、操業性も劣り、コスト高となるため好ましくない。
単糸繊度が３．５デシテックスを超えると、構成繊維の
曲げ剛性が高くなり、必然的に得られる不織布は柔軟性
に劣るため、衛生材として着用時にごわつきを感じた
り、皮膚を傷つけたりして、衛生材用不織布として支障
を来すことになる。これらの理由から、好ましくは、単
糸繊度が２．０〜３．０デシテックスであるポリ乳酸系
長繊維を用いることが好ましい。The single-filament fineness of the polylactic acid-based long fibers is 1.5 to
Must be 3.5 decitex. Single yarn fineness is 1.
If it is less than 5 decitex, the number of constituent fibers per unit area of the obtained nonwoven fabric increases, the space between the constituent fibers becomes small, and the permeation of the liquid becomes slow. Further, since the strength of the single yarn is weak, the operability is poor and the cost is high, which is not preferable.
If the single-fiber fineness exceeds 3.5 dtex, the bending stiffness of the constituent fibers increases, and the inevitably obtained non-woven fabric is inferior in flexibility. As a result, there is a problem as a nonwoven fabric for sanitary materials. For these reasons, it is preferable to use a polylactic acid-based long fiber having a single-fiber fineness of 2.0 to 3.0 decitex.
【００１０】衛生材用不織布の目付は１５〜３０ｇ／ｍ
2の範囲である必要がある。目付が１５ｇ／ｍ2未満であ
ると、得られる不織布の構成繊維間の距離が大きく、孔
が開いたような状態となるため、衛生材として着用時に
濡れ戻りがあり、不快に感じる。また、機械的特性が実
用性に乏しいものとなり好ましくない。逆に、目付が３
０ｇ／ｍ2越えると、コスト面で不利となるばかりでな
く、得られる不織布の構成繊維が密であるため、透水性
に劣るばかりか、不織布の風合いも硬くなり好ましくな
い。The basis weight of the nonwoven fabric for sanitary materials is 15 to 30 g / m
Must be in the range of 2 . When the basis weight is less than 15 g / m 2 , the distance between the constituent fibers of the obtained nonwoven fabric is large, and a pore-like state is formed. Further, the mechanical properties are poor in practicality, which is not preferable. Conversely, the basis weight is 3
If it exceeds 0 g / m 2 , not only is it disadvantageous in terms of cost, but also because the constituent fibers of the obtained nonwoven fabric are dense, not only water permeability is inferior, but also the texture of the nonwoven fabric becomes hard, which is not preferable.
【００１１】上記のような単糸繊度のポリ乳酸系長繊維
で構成され、上記の範囲の目付を有する衛生材用不織布
は、４００〜１４００ｃｍ3／ｃｍ2／秒の通気度を有す
る必要がある。４００ｃｍ3／ｃｍ2／秒未満の場合、構
成繊維間の距離が小さく、繊維間空隙が小さいため、衛
生材のトップシートとして使用した場合に、体液や粘性
物を良好に透過することができず、１４００ｃｍ3／ｃ
ｍ2／秒を超えると構成繊維が太く、目付の低い不織布
であるため、ごわつきや濡れ戻りを感じ、好ましくな
い。The nonwoven fabric for sanitary materials composed of polylactic acid-based filaments having the above single-filament fineness and having a basis weight in the above-mentioned range needs to have an air permeability of 400 to 1400 cm 3 / cm 2 / sec. . When it is less than 400 cm 3 / cm 2 / sec, the distance between the constituent fibers is small and the space between the fibers is small, so that when used as a top sheet of sanitary material, it is not possible to transmit body fluids and viscous substances well. , 1400cm 3 / c
If it exceeds m 2 / sec, the constituent fibers are thick and the nonwoven fabric has a low basis weight.
【００１２】すなわち本発明においては、ポリ乳酸系長
繊維の単糸繊度を１．５〜３．５デシテックス、衛生材
用不織布の目付を１５〜３０ｇ／ｍ2の範囲でそれぞれ
調整することにより通気度を４００〜１４００ｃｍ3／
ｃｍ2／秒の範囲にすることができ、透水性と柔軟性を
兼ね備えた衛生材用不織布を得ることができる。また、
ポリ乳酸系長繊維の単糸繊度及び衛生材用不織布の目付
を上記範囲で調整することで、通気度だけでなく不織布
が生分解する際の分解速度も制御することができる。That is, in the present invention, the ventilation is achieved by adjusting the single-filament fineness of the polylactic acid-based filament in the range of 1.5 to 3.5 dtex and the basis weight of the nonwoven fabric for sanitary material in the range of 15 to 30 g / m 2. Degree of 400 to 1400 cm 3 /
cm 2 / sec, and a nonwoven fabric for sanitary materials having both water permeability and flexibility can be obtained. Also,
By adjusting the single-filament fineness of the polylactic acid-based long fiber and the basis weight of the nonwoven fabric for sanitary material within the above ranges, not only the air permeability but also the decomposition rate at the time of biodegradation of the nonwoven fabric can be controlled.
【００１３】なお、ポリ乳酸系長繊維の単糸繊度と衛生
材用不織布の目付とは密接な関係にあり、例えば、単糸
繊度が細い場合には同一目付でも柔軟な不織布となり反
面、液体の透過が遅くなる。また、繊維自体の機械的強
力が低い場合には、不織布としての一定強力を得るため
に、目付を大きくすることが必要である。The single-filament fineness of the polylactic acid-based long fibers is closely related to the basis weight of the nonwoven fabric for sanitary material. For example, when the single-filament fineness is small, the nonwoven fabric becomes a flexible nonwoven fabric with the same basis weight, but on the other hand, the liquid Transmission slows down. When the mechanical strength of the fiber itself is low, it is necessary to increase the basis weight in order to obtain a certain strength as a nonwoven fabric.
【００１４】生分解性を有するポリ乳酸系重合体として
は、ポリ（Ｄ−乳酸）と、ポリ（Ｌ−乳酸）と、Ｄ−乳
酸とＬ−乳酸との共重合体と、Ｄ−乳酸とヒドロキシカ
ルボン酸との共重合体あるいはＬ−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
が好ましい。中でも特に、融点が１００℃以上である重
合体が好適に使用できる。ここで、乳酸とヒドロキシカ
ルボン酸との共重合体である場合におけるヒドロキシカ
ルボン酸としては、グリコール酸、ヒドリキシ酪酸、ヒ
ドリキシ吉草酸、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。Examples of the biodegradable polylactic acid-based polymer include poly (D-lactic acid), poly (L-lactic acid), a copolymer of D-lactic acid and L-lactic acid, and D-lactic acid. Any polymer selected from a copolymer of hydroxycarboxylic acid and a copolymer of L-lactic acid and hydroxycarboxylic acid is preferred. Particularly, a polymer having a melting point of 100 ° C. or more can be suitably used. Here, as the hydroxycarboxylic acid in the case of a copolymer of lactic acid and hydroxycarboxylic acid, glycolic acid, hydroxybutyric acid, hydroxyvaleric acid, hydroxycaproic acid, hydroxyheptanoic acid, hydroxycaprylic acid and the like can be mentioned.
【００１５】なお、上記のポリ乳酸系重合体は、数平均
分子量が２００００以上、好ましくは４００００以上の
ものが製糸性及び得られる糸条特性の点から好適に使用
できる。The above-mentioned polylactic acid-based polymer having a number average molecular weight of 20,000 or more, preferably 40,000 or more, can be suitably used in view of the spinning properties and the obtained yarn properties.
【００１６】また、ポリ乳酸系重合体には、結晶核剤が
添加されていてもよい。結晶核剤としては、タルク、酸
化チタン、窒化ホウ素、炭酸カルシウム、炭酸マグネシ
ウム、カーボンなどがあげられる。このような結晶核剤
を添加すると、ポリ乳酸系重合体の結晶化が促進され
て、衛生材用不織布とした際の耐熱性や機械的強力が向
上することとなる。また、ポリ乳酸系重合体を紡糸する
際には、紡出・冷却工程における糸条間の融着（ブロッ
キング）を防止できる。Further, a crystal nucleating agent may be added to the polylactic acid-based polymer. Examples of the crystal nucleating agent include talc, titanium oxide, boron nitride, calcium carbonate, magnesium carbonate, carbon and the like. When such a crystal nucleating agent is added, the crystallization of the polylactic acid-based polymer is promoted, and the heat resistance and mechanical strength of the nonwoven fabric for sanitary materials are improved. Further, when spinning the polylactic acid-based polymer, it is possible to prevent fusion (blocking) between the yarns in the spinning / cooling step.
【００１７】上記の理由により構成繊維の結晶化度が１
０〜４０％の範囲にあることが好ましい。この範囲の結
晶化度を達成するためには、ポリ乳酸系重合体に対する
結晶核剤の添加量は、０．１〜３．０重量％の範囲、よ
り好ましくは０．５〜２．０重量％の範囲であることが
望ましい。For the above reasons, the crystallinity of the constituent fibers is 1
It is preferably in the range of 0 to 40%. In order to achieve the crystallinity in this range, the amount of the nucleating agent added to the polylactic acid-based polymer is in the range of 0.1 to 3.0% by weight, more preferably 0.5 to 2.0% by weight. % Is desirable.
【００１８】また、上記結晶核剤だけでなく、顔料、艶
消し剤、着色剤、難燃剤などの各種添加剤を本発明の効
果を損なわない範囲で、必要に応じて添加しても良い。
ただし、あまり添加剤の添加量を多くすると、繊維を紡
出する際に製糸性が低下することから、添加剤はポリ乳
酸系重合体に対し０．１〜３．０重量％、好ましくは
０．５〜２．０重量％の範囲で用いることが肝要であ
る。In addition to the above-mentioned nucleating agent, various additives such as pigments, matting agents, coloring agents, flame retardants and the like may be added, if necessary, as long as the effects of the present invention are not impaired.
However, if the amount of the additive is too large, the spinnability is reduced when spinning the fiber. Therefore, the additive is used in an amount of 0.1 to 3.0% by weight, preferably 0 to 3.0% by weight based on the polylactic acid-based polymer. It is important to use it in the range of 0.5 to 2.0% by weight.
【００１９】ポリ乳酸系長繊維の繊維形態は、特に限定
されるものではなく、ポリ乳酸系重合体を単独で用いた
ものでも良いし、２種以上のポリ乳酸系重合体を用いた
複合繊維でも良い。また、繊維横断面は、通常の丸断面
の他にも、中空断面、異形断面、並列型複合断面、多層
型複合断面、芯鞘型複合断面、分割型複合断面など、そ
の目的と用途に応じて任意の繊維横断面形態を採用する
ことができる。The fiber form of the polylactic acid-based long fibers is not particularly limited, and a polylactic acid-based polymer alone may be used, or a composite fiber using two or more polylactic acid-based polymers may be used. But it is good. In addition to the normal round cross section, the fiber cross section may be hollow cross section, irregular cross section, parallel composite cross section, multilayer composite cross section, core-sheath composite cross section, split composite cross section, etc., depending on the purpose and application. Any fiber cross-sectional configuration can be employed.
【００２０】この繊維横断面のほかに、ポリ乳酸系重合
体の種類や共重合比、ポリ乳酸系重合体のブレンド比な
どを適宜選択することによって、衛生材用不織布とした
際の生分解速度を制御することができ、使用目的に応じ
た生分解速度を有する衛生材用不織布とすることができ
る。The biodegradation rate of the nonwoven fabric for sanitary materials can be obtained by appropriately selecting the type and copolymerization ratio of the polylactic acid-based polymer and the blending ratio of the polylactic acid-based polymer in addition to the cross section of the fiber. Can be controlled, and a nonwoven fabric for sanitary materials having a biodegradation rate according to the purpose of use can be obtained.
【００２１】衛生材用不織布の引張強力は、１５Ｎ／５
ｃｍ幅以上であることが好ましく、さらに好ましくは２
０Ｎ／５ｃｍ幅以上である。引張強力が１５Ｎ／５ｃｍ
幅未満であると、例えば使い捨ておむつとして着用時あ
るいは着脱の取り扱い時の応力に耐え得ることができ
ず、破裂しやすく、実用的でない。なお、不織布の引張
強力は、不織布を構成する繊維に用いた重合体の種類
や、構成繊維の繊度や強度、また不織布の目付及び不織
布形態などによって決まる。The tensile strength of the nonwoven fabric for sanitary materials is 15 N / 5
cm width or more, more preferably 2 cm or more.
0 N / 5 cm width or more. Tensile strength is 15N / 5cm
If the width is less than the width, for example, the disposable diaper cannot withstand the stress when worn or handled during attachment and detachment, easily bursts, and is not practical. The tensile strength of the nonwoven fabric is determined by the type of polymer used for the fibers constituting the nonwoven fabric, the fineness and strength of the constituent fibers, the basis weight of the nonwoven fabric, the form of the nonwoven fabric, and the like.
【００２２】また、本発明の衛生材用不織布の形態とし
ては、構成繊維同志が水流交絡処理等により、交絡して
一体化してなるもの、熱風処理等により、繊維交点が熱
融着して一体化してなるもの、また、部分熱圧着処理に
より部分的な熱圧着部を有することにより一体化してな
る不織布等が挙げられる。中でも部分的に熱圧着されて
不織布としての形態が保持されている不織布が強力の点
から好ましい。部分的に熱圧着された不織布は、点状融
着区域においてのみ接着されているため、柔軟性と形態
保持性をとを兼ね備えたものとなり、柔らかくて毛羽立
ちにくいという使用感の良好な衛生材用不織布となる。
ここで、部分的な熱圧着とは、エンボス加工または超音
波融着処理によって点状融着区域を形成するものをい
い、具体的には、加熱されたエンボスロールと表面が平
滑なロールとの間にウェブを通して繊維間に点状融着区
域を形成する方法またはパターンロール上で超音波によ
る高周波を印加してパターン部の繊維間に点状融着区域
を形成する方法が採用される。The form of the nonwoven fabric for sanitary materials of the present invention may be one in which the constituent fibers are entangled and integrated by a hydroentanglement treatment or the like, or the fiber intersections are thermally fused by a hot air treatment or the like. And a nonwoven fabric or the like that is integrated by having a partial thermocompression part by a partial thermocompression treatment. Among them, a nonwoven fabric which is partially thermocompressed and retains its form as a nonwoven fabric is preferred from the viewpoint of strength. Partially thermo-compressed non-woven fabric is bonded only in the point-like fusing area, so it has both flexibility and shape retention, and is soft and less fuzzy for sanitary materials with good usability. It becomes a non-woven fabric.
Here, the partial thermocompression bonding refers to forming a point-like fusion zone by embossing or ultrasonic fusion treatment.Specifically, a heated embossing roll and a roll having a smooth surface are formed. A method of forming a point-like fusion zone between fibers through a web therebetween or a method of applying a high-frequency ultrasonic wave on a pattern roll to form a point-like fusion zone between fibers of a pattern portion is adopted.
【００２３】以下に本発明の衛生材用不織布の製造方法
の代表例を説明する。まず、本発明の衛生材用不織布
は、いわゆるスパンボンド法にて効率よく製造すること
ができる。すなわち、上述のポリ乳酸系重合体を加熱溶
融して紡糸口金から吐出させ、得られた紡出糸条を従来
公知の横型吹付や環状吹付などの冷却装置を用いて冷却
し、その後、エアーサッカーなどの吸引装置にて牽引細
化する。引き続き、吸引装置から排出された糸条群を開
繊させた後、スクリーンから成るコンベアの如き移動堆
積装置上に堆積させてウェブとする。Hereinafter, representative examples of the method for producing a nonwoven fabric for sanitary materials of the present invention will be described. First, the nonwoven fabric for sanitary materials of the present invention can be efficiently produced by a so-called spunbond method. That is, the above-mentioned polylactic acid-based polymer is heated and melted and discharged from a spinneret, and the obtained spun yarn is cooled using a conventionally known cooling device such as a horizontal spraying or an annular spraying. Use a suction device such as this to make it thin. Subsequently, after the yarn group discharged from the suction device is spread, it is deposited on a moving deposition device such as a conveyor composed of a screen to form a web.
【００２４】次いで、この移動堆積装置上に形成された
ウェブに、加熱されたエンボスロールまたは超音波融着
装置などの部分熱圧着装置を用いて部分的に熱圧着を施
すことにより、長繊維不織布を得る。Next, the web formed on the moving deposition apparatus is partially subjected to thermocompression bonding using a heated thermocompression roll or a partial thermocompression bonding apparatus such as an ultrasonic fusing apparatus to thereby obtain a long-fiber nonwoven fabric. Get.
【００２５】本発明において、紡出糸条を３５００〜６
０００ｍ／分の高速で牽引細化することが好ましい。紡
出糸条を牽引細化する際に牽引速度が３５００ｍ／分未
満では、重合体の配向結晶化が進まず、得られる不織布
の機械的特性が低下することとなり、逆に、牽引速度が
６０００ｍ／分を超えると、製糸性が急激に悪化して糸
切れを起こすため、好ましくない。In the present invention, the spun yarn is from 3500 to 6
It is preferable to make the traction at a high speed of 000 m / min. If the drawing speed is less than 3500 m / min when the spun yarn is drawn and thinned, the oriented crystallization of the polymer does not proceed, and the mechanical properties of the obtained nonwoven fabric are reduced, and conversely, the drawing speed is 6,000 m / min. When the rate exceeds / min, the yarn-forming property is rapidly deteriorated and the yarn breaks, which is not preferable.
【００２６】[0026]
【実施例】次に、実施例に基づき本発明を具体的に説明
するが、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。なお、以下の実施例、比較例における各種物
性値の測定は以下の方法により実施した。 （１）融点（℃）：パーキンエルマー社製の示差走査熱
量計ＤＳＣ−７型を用いて、昇温速度を２０℃／分で測
定し、得られた融解吸熱曲線において極値を与える温度
を融点とした。 （２）メルトフローレート（ｇ／１０分）：ＡＳＴＭ
Ｄ−１２３８（Ｌ）に記載の方法に準じて測定した。 （３）単糸繊度（デシテックス）：ウェブの状態におけ
る繊維径を５０本顕微鏡にて測定し、密度補正して求め
た繊度の平均値を繊度（デシテックス）とした。 （４）目付（ｇ／ｍ2）：標準状態の試料から縦１０ｃ
ｍ×横１０ｃｍの試料各１０点を作成し、平衡水分に至
らしめた後、各試料片の重量（ｇ）を秤量し、得られた
値の平均値を単位面積当たりに換算して、目付（ｇ／ｍ
2）とした。 （５）引張強力（Ｎ／５ｃｍ幅）：ＪＩＳ−Ｌ１９０６
に記載のストリップ法に準じて測定した。すなわち、試
料長が２０ｃｍ、試料幅が５ｃｍの試料片を不織布の縦
方向（ＭＤ）に各１０点作成し、定速伸長形引張試験機
（東洋ボールドウィン社製テンシロンＵＴＭ−４−１−
１００）を用いて、試料のつかみ間隔１０ｃｍとし、引
張速度２０ｃｍ／分で伸長した。そして、得られた最大
引張強力（Ｎ／５ｃｍ幅）の平均値を引張強力（Ｎ／５
ｃｍ幅）とした。 （６）通気度（ｃｍ3／ｃｍ2／秒）：カトーテック社製
の通気度試験機（ＫＥＳ−Ｆ−ＡＰ１）を用いて、各５
点の通気抵抗Ｒ（Ｐａ・秒／ｍ）を測定し、空気流量Ｑ
（ｃｍ3／ｃｍ2／秒）をＱ＝１２．４５／Ｒで算出後、
得られた値の平均値を通気度とした。 （７）分解性能：ＩＳＯ １４８５５に準拠して評価し
た。Next, the present invention will be specifically described based on examples, but the present invention is not limited to only these examples. In addition, the measurement of various physical property values in the following Examples and Comparative Examples was performed by the following methods. (1) Melting point (° C.): Using a differential scanning calorimeter DSC-7 manufactured by Perkin Elmer, the temperature rising rate was measured at 20 ° C./min, and the temperature at which an extreme value was obtained in the obtained melting endothermic curve was determined. Melting point. (2) Melt flow rate (g / 10 minutes): ASTM
It measured according to the method of D-1238 (L). (3) Single yarn fineness (decitex): The fiber diameter in the state of the web was measured with a 50-line microscope, and the average value of the fineness determined by density correction was defined as fineness (decitex). (4) Basis weight (g / m 2 ): 10 c vertically from the sample in the standard state
After preparing 10 points of each sample of mx 10 cm in width and reaching equilibrium moisture, the weight (g) of each sample piece is weighed, and the average value of the obtained values is converted into a unit area to obtain a basis weight. (G / m
2 ) (5) Tensile strength (N / 5 cm width): JIS-L1906
The measurement was carried out according to the strip method described in (1). That is, a sample piece having a sample length of 20 cm and a sample width of 5 cm is prepared in each of ten points in the machine direction (MD) of the nonwoven fabric, and a constant speed elongation type tensile tester (Tensilon UTM-4-1- manufactured by Toyo Baldwin Co., Ltd.).
Using 100), the sample was stretched at a gripping interval of 10 cm and a tensile speed of 20 cm / min. Then, the average value of the obtained maximum tensile strength (N / 5 cm width) was calculated as the tensile strength (N / 5).
cm width). (6) Permeability (cm 3 / cm 2 / sec): Using a permeability tester (KES-F-AP1) manufactured by Kato Tech Co., Ltd., each 5
The airflow resistance R (Pa · sec / m) of the point is measured, and the air flow rate Q
After calculating (cm 3 / cm 2 / sec) by Q = 12.45 / R,
The average of the obtained values was defined as the air permeability. (7) Decomposition performance: evaluated in accordance with ISO 14855.
【００２７】 ○：生分解度７０％以上 ×：生分解度７０％未満 実施例１ 衛生材用不織布をスパンボンド法により作成した。○: Biodegradation degree of 70% or more ×: Biodegradation degree of less than 70% Example 1 A nonwoven fabric for sanitary material was prepared by a spunbond method.
【００２８】まず、長繊維を形成するために、融点が１
７０℃、メルトフローレートが６０ｇ／１０分、Ｄ−乳
酸とＬ−乳酸との共重合比がＤ／Ｌ＝１／９９（モル
比）となるポリ乳酸を用いて、紡糸温度２００℃、単孔
吐出量１．７ｇ／分の条件下で、溶融紡糸を行った。First, in order to form a long fiber, the melting point is 1
Using a polylactic acid having a melt flow rate of 60 g / 10 min and a copolymerization ratio of D-lactic acid and L-lactic acid of D / L = 1/99 (molar ratio) at a spinning temperature of 200 ° C. Melt spinning was performed under the condition of a hole discharge amount of 1.7 g / min.
【００２９】次に、紡出糸条を冷却装置にて冷却し、引
き続いて紡糸口金の下方に設置したエアーサッカーにて
紡糸速度５０００ｍ／分で牽引細化し、公知の開繊機を
用いて開繊し、そして移動するスクリーンコンベア上に
ウェブとして堆積させた。Next, the spun yarn is cooled by a cooling device, and subsequently drawn and thinned at a spinning speed of 5,000 m / min by an air sucker installed below the spinneret, and opened by a known opening machine. And deposited as a web on a moving screen conveyor.
【００３０】次いで、このウェブを、ロール温度を１２
８℃としたエンボスロールからなる部分熱圧着装置に通
して、線圧３０ｋｇ／ｃｍで熱圧着し、単糸繊度が３．
４デシテックスの長繊維からなる目付が２０ｇ／ｍ2で
ある長繊維不織布を得た。Next, the web was rolled at a roll temperature of 12
It was passed through a partial thermocompression bonding device consisting of embossing rolls at 8 ° C. and thermocompression bonded at a linear pressure of 30 kg / cm.
A long-fiber nonwoven fabric having a basis weight of 20 g / m 2 consisting of 4 dtex long fibers was obtained.
【００３１】この長繊維不織布により構成される衛生材
用不織布を、コンポスト化処理装置に一定期間放置した
のち生分解状況を観察した。得られた衛生材用不織布の
物性、生分解性等を表１に示す。The nonwoven fabric for sanitary materials constituted by the long-fiber nonwoven fabric was allowed to stand in a composting treatment apparatus for a certain period, and then the state of biodegradation was observed. Table 1 shows the physical properties, biodegradability and the like of the obtained nonwoven fabric for sanitary materials.
【００３２】[0032]
【表１】 実施例２ 単孔吐出量を０．９ｇ／分、紡糸速度を３８００ｍ／分
とし、また長繊維の単糸繊度を２．４デシテックスとし
た。[Table 1] Example 2 The single hole discharge amount was 0.9 g / min, the spinning speed was 3800 m / min, and the single fiber fineness of the long fiber was 2.4 decitex.
【００３３】そしてそれ以外は実施例１と同様にして目
付が１７ｇ／ｍ2である長繊維不織布を作成し、この長
繊維不織布により構成される衛生材用不織布を得た。得
られた衛生材用不織布の物性、生分解性等を表１に示
す。 実施例３ 単孔吐出量を１．１ｇ／分、紡糸速度を５６００ｍ／分
として実施例１と同様にウェブを作成し、このウェブを
ロール温度を１２８℃としたエンボスロールからなる部
分熱圧着装置に通して、線圧３０ｋｇ／ｃｍで熱圧着
し、単糸繊度が１．９デシテックスの長繊維からなる目
付が１５ｇ／ｍ2である長繊維不織布を得た。Otherwise, a long-fiber nonwoven fabric having a basis weight of 17 g / m 2 was prepared in the same manner as in Example 1 to obtain a nonwoven fabric for sanitary materials constituted by this long-fiber nonwoven fabric. Table 1 shows the physical properties, biodegradability and the like of the obtained nonwoven fabric for sanitary materials. Example 3 A web was formed in the same manner as in Example 1 except that the single hole discharge rate was 1.1 g / min and the spinning speed was 5600 m / min. To obtain a long-fiber nonwoven fabric having a single-fiber fineness of 1.9 dtex and a basis weight of 15 g / m 2 by thermocompression bonding at a linear pressure of 30 kg / cm.
【００３４】この長繊維不織布により構成される衛生材
用不織布の物性、生分解性を表１に示す。実施例１〜実
施例３は、いずれも単糸繊度、目付および通気度が本発
明の範囲内であるため、通気度と強力に優れた衛生材用
不織布が得られた。また、生分解性を有するポリ乳酸径
長繊維からなる不織布とすることで、コンポスト化処理
装置に適用しても良好に分解処理できた。 比較例１ 実施例１と同様にして作成した長繊維を用いて目付が５
０ｇ／ｍ2である長繊維不織布を作成し、この長繊維不
織布により構成される衛生材用不織布を得た。Table 1 shows the physical properties and biodegradability of the nonwoven fabric for sanitary materials composed of this long-fiber nonwoven fabric. In all of Examples 1 to 3, since the single-fiber fineness, the basis weight and the air permeability were within the scope of the present invention, a nonwoven fabric for sanitary materials having excellent air permeability and strength was obtained. In addition, by using a biodegradable nonwoven fabric made of long diameter polylactic acid fibers, the decomposition treatment was successfully performed even when applied to a composting treatment device. Comparative Example 1 Using a long fiber produced in the same manner as in Example 1, the basis weight was 5
A long-fiber nonwoven fabric of 0 g / m 2 was prepared, and a nonwoven fabric for sanitary materials constituted by the long-fiber nonwoven fabric was obtained.
【００３５】得られた衛生材用不織布の物性、生分解性
等を表１に示す。 比較例２ 単孔吐出量を３．５ｇ／分、紡糸速度を４６００ｍ／分
として実施例１と同様にウェブを作成し、このウェブを
ロール温度を１２８℃としたエンボスロールからなる部
分熱圧着装置に通して、線圧３０ｋｇ／ｃｍで熱圧着
し、単糸繊度が７．６デシテックスの長繊維からなる目
付が１５ｇ／ｍ2である長繊維不織布を得た。Table 1 shows the physical properties, biodegradability and the like of the obtained nonwoven fabric for sanitary materials. Comparative Example 2 A web was formed in the same manner as in Example 1 except that the single-hole discharge rate was 3.5 g / min and the spinning speed was 4600 m / min, and the web was partially thermocompressed with an embossing roll having a roll temperature of 128 ° C. To obtain a long-fiber nonwoven fabric having a single-fiber fineness of 7.6 dtex and a basis weight of 15 g / m 2 by thermocompression bonding at a linear pressure of 30 kg / cm.
【００３６】この長繊維不織布により構成される衛生材
用不織布の物性、生分解性等を表１に示す。比較例１
は、目付が本発明の範囲を超えていたため、通気度に劣
り、また柔軟性にも劣るものとなり、実使用に適さない
ものとなった。Table 1 shows the physical properties, biodegradability and the like of the nonwoven fabric for sanitary materials composed of this long fiber nonwoven fabric. Comparative Example 1
Since the basis weight was beyond the range of the present invention, the air permeability was inferior and the flexibility was inferior, so that it was not suitable for practical use.
【００３７】比較例２は、単糸繊度が本発明の範囲より
も太かったため、目付が小さくなり通気度が高すぎてや
はり実使用に適さないものとなった。In Comparative Example 2, since the single-fiber fineness was larger than the range of the present invention, the basis weight was small and the air permeability was too high, which was not suitable for actual use.
【００３８】[0038]
【発明の効果】このように本発明によれば、生分解性を
有するポリ乳酸系重合体からなる長繊維不織布で構成さ
れた衛生材用不織布とすることで、土壌やコンポスト中
で一定期間経過後には微生物により捕集した生ゴミと共
に完全に分解されるため、捕集した生ゴミとの分離とい
う手間が省け、しかも有機物循環型の廃棄方法を推進で
きる。また、ポリ乳酸系繊維の単糸繊度を１．３〜３．
５デシテックス、衛生材用不織布の目付を１５〜３０ｇ
／ｍ2の範囲で調整することにより、濡れ戻りがなく、
かつ体液および粘性物等を良好に透過することができる
という衛生材用不織布としての性能が得られる。As described above, according to the present invention, a nonwoven fabric for sanitary material composed of a long-fiber nonwoven fabric made of a biodegradable polylactic acid-based polymer can be used for a certain period of time in soil or compost. Later, the microorganisms are completely decomposed together with the collected garbage, so that it is not necessary to separate the collected garbage from the collected garbage, and the organic matter recycling type disposal method can be promoted. In addition, the single-filament fineness of the polylactic acid-based fiber is 1.3 to 3.
5 decitex, 15-30 g of non-woven fabric for sanitary material
/ M 2 range, there is no re-wetting,
In addition, the performance as a nonwoven fabric for sanitary materials is obtained, which is capable of satisfactorily transmitting body fluids and viscous substances.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ａ６１Ｆ 13/15 (72)発明者 松永 篤 愛知県岡崎市日名北町４番地１ ユニチカ 株式会社岡崎工場内 (72)発明者 吉田 典古 愛知県岡崎市日名北町４番地１ ユニチカ 株式会社岡崎工場内 (72)発明者 北野 隆祝 愛知県岡崎市日名北町４番地１ ユニチカ 株式会社岡崎工場内 Ｆターム(参考） 3B029 BB07 BD21 4C003 BA01 BA08 4C098 AA09 DD10 4L035 BB31 DD19 EE20 FF05 JJ01 4L047 AA21 AB03 AB10 BA09 BB06 CC03 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI Theme coat ゛ (Reference) A61F 13/15 (72) Inventor Atsushi Matsunaga 4-1, Hina Kitamachi, Okazaki City, Aichi Prefecture Unitika Okazaki Plant (72) Inventor Noriko Yoshida 4-1, Hina Kitamachi, Okazaki City, Aichi Prefecture Unitika Okazaki Plant Co., Ltd. (72) Inventor Takanori Kitano 4-1, Hina Kitamachi, Okazaki City, Aichi Prefecture Unitika Okazaki Plant F Term (Reference) 3B029 BB07 BD21 4C003 BA01 BA08 4C098 AA09 DD10 4L035 BB31 DD19 EE20 FF05 JJ01 4L047 AA21 AB03 AB10 BA09 BB06 CC03
Claims (4)
布であって、前記ポリ乳酸系長繊維の単糸繊度が１．５
〜３．５デシテックスで、前記生分解性不織布の目付が
１５〜３０ｇ／ｍ2の範囲で、かつ４００〜１４００ｃ
ｍ3／ｃｍ2／秒の通気度を有することを特徴とする生分
解性衛生材用不織布。1. A biodegradable nonwoven fabric comprising polylactic acid-based filaments, wherein the polylactic acid-based filaments have a single yarn fineness of 1.5.
~ 3.5 decitex, and the basis weight of the biodegradable nonwoven fabric is in the range of 15 to 30 g / m 2 , and 400 to 1400 c
A nonwoven fabric for a biodegradable hygiene material, which has an air permeability of m 3 / cm 2 / sec.
と、ポリ（Ｌ−乳酸）と、Ｄ−乳酸とＬ−乳酸との共重
合体と、Ｄ−乳酸とヒドロキシカルボン酸との共重合体
と、Ｌ−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記載の生分解性衛
生材用不織布。2. The polylactic acid-based long fiber is 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, and a copolymer of L-lactic acid and hydroxycarboxylic acid The non-woven fabric for biodegradable sanitary materials according to claim 1, wherein the non-woven fabric is a polymer selected from the group consisting of: and a blend thereof.
ていることを特徴とする請求項１または請求項２記載の
生分解性衛生材用不織布。3. The non-woven fabric for biodegradable sanitary materials according to claim 1, wherein a crystal nucleating agent is added to the polylactic acid-based long fiber.
理が可能であることを特徴とする請求項１から請求項３
までのいずれか１項に記載の生分解性衛生材用不織布。4. The method according to claim 1, wherein decomposition processing is possible in the composting processing apparatus.
The nonwoven fabric for a biodegradable sanitary material according to any one of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001041060A JP2002242068A (en) | 2001-02-19 | 2001-02-19 | Nonwoven fabric for biodegradable sanitary material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001041060A JP2002242068A (en) | 2001-02-19 | 2001-02-19 | Nonwoven fabric for biodegradable sanitary material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002242068A true JP2002242068A (en) | 2002-08-28 |
Family
ID=18903557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001041060A Pending JP2002242068A (en) | 2001-02-19 | 2001-02-19 | Nonwoven fabric for biodegradable sanitary material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002242068A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304674C (en) * | 2004-04-20 | 2007-03-14 | 东华大学 | Superfine non-woven fabric from fiber of poly lactic acid and fabricating method |
| JP2011174193A (en) * | 2010-02-24 | 2011-09-08 | Unitika Ltd | Polylactic acid-based filament nonwovwn fabric |
| CN103031667A (en) * | 2012-12-27 | 2013-04-10 | 杭州可靠护理用品股份有限公司 | Fully degradable non-woven material and application thereof to incontinence nursing pads for adults |
| JP2023131336A (en) * | 2022-03-09 | 2023-09-22 | 王子ホールディングス株式会社 | Soil improvement method, soil improvement system, absorbent article, and soil improvement agent |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11107155A (en) * | 1997-10-03 | 1999-04-20 | Chisso Corp | Laminated nonwoven fabric and absorptive material by using the same |
| JP2000273750A (en) * | 1999-01-19 | 2000-10-03 | Unitika Ltd | Biodegradable filament nonwoven cloth and its production |
| JP2001000477A (en) * | 1999-06-24 | 2001-01-09 | Uni Charm Corp | Flexible sheet for disposable wearing article |
-
2001
- 2001-02-19 JP JP2001041060A patent/JP2002242068A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11107155A (en) * | 1997-10-03 | 1999-04-20 | Chisso Corp | Laminated nonwoven fabric and absorptive material by using the same |
| JP2000273750A (en) * | 1999-01-19 | 2000-10-03 | Unitika Ltd | Biodegradable filament nonwoven cloth and its production |
| JP2001000477A (en) * | 1999-06-24 | 2001-01-09 | Uni Charm Corp | Flexible sheet for disposable wearing article |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304674C (en) * | 2004-04-20 | 2007-03-14 | 东华大学 | Superfine non-woven fabric from fiber of poly lactic acid and fabricating method |
| JP2011174193A (en) * | 2010-02-24 | 2011-09-08 | Unitika Ltd | Polylactic acid-based filament nonwovwn fabric |
| CN103031667A (en) * | 2012-12-27 | 2013-04-10 | 杭州可靠护理用品股份有限公司 | Fully degradable non-woven material and application thereof to incontinence nursing pads for adults |
| JP2023131336A (en) * | 2022-03-09 | 2023-09-22 | 王子ホールディングス株式会社 | Soil improvement method, soil improvement system, absorbent article, and soil improvement agent |
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