JPH02175961A - Nonwoven fabric of ethylene-vinyl alcohol copolymer fiber and production thereof - Google Patents
Nonwoven fabric of ethylene-vinyl alcohol copolymer fiber and production thereofInfo
- Publication number
- JPH02175961A JPH02175961A JP63333787A JP33378788A JPH02175961A JP H02175961 A JPH02175961 A JP H02175961A JP 63333787 A JP63333787 A JP 63333787A JP 33378788 A JP33378788 A JP 33378788A JP H02175961 A JPH02175961 A JP H02175961A
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- ethylene
- vinyl acetate
- melt
- mol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 48
- 239000000835 fiber Substances 0.000 title claims abstract description 42
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 title claims description 6
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 229920000642 polymer Polymers 0.000 claims abstract description 25
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 24
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 24
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000005977 Ethylene Substances 0.000 claims abstract description 20
- 238000007127 saponification reaction Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 13
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229920001410 Microfiber Polymers 0.000 claims abstract description 8
- 238000009987 spinning Methods 0.000 claims description 24
- 239000000155 melt Substances 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000004744 fabric Substances 0.000 abstract description 15
- 239000004750 melt-blown nonwoven Substances 0.000 description 11
- 239000004372 Polyvinyl alcohol Substances 0.000 description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000002074 melt spinning Methods 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 229920003043 Cellulose fiber Polymers 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920000305 Nylon 6,10 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 1
- 238000010035 extrusion spinning Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- RZXDTJIXPSCHCI-UHFFFAOYSA-N hexa-1,5-diene-2,5-diol Chemical compound OC(=C)CCC(O)=C RZXDTJIXPSCHCI-UHFFFAOYSA-N 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Landscapes
- Artificial Filaments (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明はセルロース系繊維に類似した触感と風合いを有
し、緻密で柔軟な不織布の製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for producing a dense and flexible nonwoven fabric that has a touch and feel similar to cellulose fibers.
〈従来の技術〉
従来、エチレン−酢酸ビニル共重合体酸化物あるいはエ
チレン−ポリビニルアルコール共重合体を溶融紡糸法で
繊維を製造することについては多くの提案がなされてい
る。例えば、重合体の極限粘度（Ｖ）が１．０２６の高
粘度重合体で、エチレン含有量２０〜５０モル％、酢酸
ビニル部分の酸化度が９８モル％以上のエチレン−酢酸
ビニル共重合体鹸化物を、押出式紡糸機により樹脂温度
２１０〜２６０°Ｃに加熱して溶融紡糸し、紡糸された
未延伸糸を特定の温度条件下で延伸することが特公昭５
６−１６２０４号公報、特公昭５６−１７４４２号公報
、特公昭５６−１７４４３号公報、特公昭５６−１７４
４４号公報に、炭素数５〜３０の長鎖α−オレフィンを
０．５〜１０モル％含有する長鎖α−オレフィン−酢酸
ビニル共重合体酸化物の鹸化度９０モル％以上であって
、かつ温度２３０ ℃における溶融粘度１ｘ１０４〜ｌ
×１０６ポイズの変性ポリビニルアルコールを加熱溶融
して溶融紡糸し、延伸し、熱処理することが特開昭４９
−１１０９１７号公報に、また、エチレン含有量１５〜
５０モル％、鹸化度が９８．５モル％以上のエチレン−
酢酸ビニル共重合体鹸化物と疎水性熱可塑性樹脂とを、
溶融接合法で紡糸して接合型複合繊維を製造することが
特開昭４８−８０８２０号公報、特開昭 ５５−１３７
９号公報などに提案されている。<Prior Art> Conventionally, many proposals have been made regarding producing fibers from ethylene-vinyl acetate copolymer oxide or ethylene-polyvinyl alcohol copolymer by melt spinning. For example, saponification of an ethylene-vinyl acetate copolymer with a high viscosity polymer with an intrinsic viscosity (V) of 1.026, an ethylene content of 20 to 50 mol%, and an oxidation degree of the vinyl acetate portion of 98 mol% or more. It was established in 1977 that a material is melt-spun by heating the resin to a resin temperature of 210 to 260°C using an extrusion spinning machine, and the spun undrawn yarn is stretched under specific temperature conditions.
6-16204, JP 56-17442, JP 56-17443, JP 56-174
No. 44 discloses that a long-chain α-olefin-vinyl acetate copolymer oxide containing 0.5-10 mol% of a long-chain α-olefin having 5 to 30 carbon atoms has a saponification degree of 90 mol% or more, and a melt viscosity of 1x104 to 1 at a temperature of 230°C
JP-A-49-1996 discloses that modified polyvinyl alcohol of ×106 poise is heated and melted, melt-spun, stretched, and heat-treated.
-110917, the ethylene content is 15~
Ethylene with a saponification degree of 50 mol% or more and 98.5 mol% or more
A saponified vinyl acetate copolymer and a hydrophobic thermoplastic resin,
JP-A-48-80820 and JP-A-55-137 disclose the production of bonded conjugate fibers by spinning using a melt bonding method.
This is proposed in Publication No. 9, etc.
〈発明が解決しようとする課題〉
従来のエチレン−酢酸ビニル共重合体酸化物の溶融紡糸
では、高い耐熱水性と引張特性の点から高い曳糸性と延
伸性を得るために、一般に高粘度重合体が、そして、繊
維としての染色性、帯電防止性、繊維強度を得るために
、高いポリビニルアルコール成分の共重合体が用いられ
ている。<Problems to be Solved by the Invention> In conventional melt spinning of ethylene-vinyl acetate copolymer oxide, high viscosity and heavy weight yarns are generally used in order to obtain high stringability and drawability from the viewpoint of high hot water resistance and tensile properties. Copolymers with a high polyvinyl alcohol component are used in order to obtain dyeability, antistatic properties, and fiber strength as fibers.
しかし、従来の溶融紡糸に使用されているエチレン−酢
酸ビニル共重合体鹸化物を用いた場合、溶融押出物を高
圧気体噴射流で繊維流を形成し、搬送してシート状に捕
集して不織布とするメルトブローン法の不織布製造では
、均一性の良好な繊維流を形成することができない。す
なわち、十分に細化、配向した繊維が得られず、繊維の
太さ、繊維長が不均一であり、特に、メルトブローン法
で幅が１ｍを越える広幅の不織布を均一性の高いメルト
ブローン不織布とすることは困難である。However, when using the saponified ethylene-vinyl acetate copolymer used in conventional melt spinning, the melt extrudate is formed into a fiber stream using a high-pressure gas jet stream, which is then conveyed and collected in the form of a sheet. When producing a nonwoven fabric using the melt blown method, it is not possible to form a fiber stream with good uniformity. In other words, sufficiently thinned and oriented fibers cannot be obtained, and the thickness and fiber length of the fibers are non-uniform.In particular, a wide nonwoven fabric with a width of more than 1 m by the meltblown method is made into a meltblown nonwoven fabric with high uniformity. That is difficult.
本発明はメルトブローン法の不織布製造において、十分
に細化、配向した繊維であって、均一性の良好な繊維流
の形成が得られ、広幅の不織布でも均一性の良いメルト
ブローン不織布で、かつ、緻密で柔軟な不織布を提供す
るにある。The present invention is a melt-blown non-woven fabric that can be used to produce non-woven fabrics using the melt-blown method.The fibers are sufficiently thinned and oriented to form a fiber stream with good uniformity, and the melt-blown non-woven fabric has good uniformity even in wide width non-woven fabrics. To provide flexible non-woven fabrics.
〈課題を解決するための手段〉
本発明は、エチレン含有量４０〜６０モル％、酢酸ビニ
ル鹸化度８５モル％以上で、かつ固有粘度（Ｖ）が０．
０５５〜０．０８５ｆ２／ｇの範囲にあるエチレン−酢
酸ビニル共重合体酸化物を主体とした重合体の平均繊維
直径８ミクロン以下のメルトブローン極細繊維不織布で
あることを特徴とするエチレン−ビニルアルコール系共
重合体繊維不織布である。<Means for Solving the Problems> The present invention has an ethylene content of 40 to 60 mol%, a vinyl acetate saponification degree of 85 mol% or more, and an intrinsic viscosity (V) of 0.
An ethylene-vinyl alcohol-based nonwoven fabric made of melt-blown ultrafine fibers having an average fiber diameter of 8 microns or less and made of a polymer mainly composed of ethylene-vinyl acetate copolymer oxide in the range of 0.055 to 0.085 f2/g. It is a copolymer fiber nonwoven fabric.
また、本発明は、エチレン−酢酸ビニル共重合体酸化物
において、エチレン含有量４０〜６０モル％、酢酸ビニ
ル鹸化度８５モル％以上で、かつ固有粘度〔ｌ〕が０．
０５５〜０．０８！Ｍｔ／ｇの範囲にある重合体を主体
とした重合体を溶融し、メルトブローン法で紡糸して極
細繊維流を形成し、該繊維流をシート状に捕集して不織
布とすることを特徴とするエチレン−ビニルアルコール
系共重合体繊維不織布の製造法である。Further, the present invention provides an ethylene-vinyl acetate copolymer oxide having an ethylene content of 40 to 60 mol%, a vinyl acetate saponification degree of 85 mol% or more, and an intrinsic viscosity [l] of 0.
055~0.08! It is characterized by melting a polymer mainly consisting of a polymer in the range of Mt/g, spinning it by a melt blowing method to form an ultrafine fiber stream, and collecting the fiber stream in a sheet form to make a nonwoven fabric. This is a method for producing an ethylene-vinyl alcohol copolymer fiber nonwoven fabric.
更に、本発明はエチレン−酢酸ビニル共重合体鹸化物が
エチレン含有量４０〜６０モル％、酢酸ビニル酸化度８
５モル％以上で、かつ重合体の固有粘度〔η〕が０．０
５５〜０．０８５ Ｑ／ｇの範囲にある重合体を主体
とした重合体を溶融し、温度２５０〜３００℃でメルト
ブローン法紡糸によって平均繊維直径８ミクロン以下の
極細繊維流を形成し、該繊維流を捕集して不織布とする
ことを特徴とするエチレン−ビニルアルコール系共重合
体繊維不織布の製造法である。Further, in the present invention, the saponified ethylene-vinyl acetate copolymer has an ethylene content of 40 to 60 mol% and a vinyl acetate oxidation degree of 8.
5 mol% or more, and the intrinsic viscosity [η] of the polymer is 0.0
A polymer mainly composed of a polymer in the range of 55 to 0.085 Q/g is melted and a stream of ultrafine fibers with an average fiber diameter of 8 microns or less is formed by melt-blown spinning at a temperature of 250 to 300°C. This is a method for producing an ethylene-vinyl alcohol copolymer fibrous nonwoven fabric, which is characterized in that the flow is collected to make a nonwoven fabric.
すなわち、本発明のメルトブローン法紡糸で均一性の良
好な不織布を製造するのに適しｊ；エチレン−酢酸ビニ
ル共重合体鹸化物は、特定の物性範囲にある重合体を使
用することである。まず、共重合体中のエチレン含有量
は４０〜６０モル％の範囲であり、エチレン含有量が４
０モル％未満である場合には、重合体の熱安定性が悪く
なり、溶融粘度が上昇し、不溶融性物（ゲル状物）が発
生して安定なメルトブローン法紡糸ができないとか、良
好な繊維流の形成が得られないとか、不織布中に未溶粒
物などの粒状物の混入が多くなる。一方、エチレン含有
量が６０モル％を越えて多くなると、ポリビニルアルコ
ール特有の剛性、引張特性、染色性、耐熱性が低下し、
更に、不織布の触感がポリオレフィン様あるいはワック
ス様の好ましくないものとなる。That is, the saponified ethylene-vinyl acetate copolymer is suitable for producing a nonwoven fabric with good uniformity by the melt-blown spinning method of the present invention; the saponified ethylene-vinyl acetate copolymer is a polymer having a specific physical property range. First, the ethylene content in the copolymer is in the range of 40 to 60 mol%, and the ethylene content is 40 to 60 mol%.
If it is less than 0 mol%, the thermal stability of the polymer will deteriorate, the melt viscosity will increase, and infusible matter (gel-like matter) will be generated, making stable melt-blown spinning impossible or resulting in poor quality. The formation of fiber flow may not be obtained, or a large amount of particulate matter such as undissolved particles may be mixed into the nonwoven fabric. On the other hand, when the ethylene content exceeds 60 mol%, the rigidity, tensile properties, dyeability, and heat resistance characteristic of polyvinyl alcohol decrease.
Furthermore, the feel of the nonwoven fabric becomes undesirably polyolefin-like or wax-like.
また、重合体の重合度もメルトブローン法紡糸性に大き
な影響をもたらす。すなわち、本発明で使用するエチレ
ン−酢酸ビニル共重合体鹸化物の溶液で測定して求めた
固有粘度〔η〕は０．０５５〜０．０８５＋２／ｇの範
囲である。そして、重合体の固有粘度（？）が０．０５
５（２／ｇ未満では溶融粘度が小さくて、十分な曳糸性
が得られず、良好な繊維流を形成することができないた
めに、均一性の良い不織布が得られないとか、不織布中
に微小な玉状物が多数混入するとか、不織布の強力が低
く、腰がなくなるとか、耐熱性が低下するなどのために
実用性に乏しい不織布となる。一方、重合体の固有粘度
〔ｌ〕が０．０８５ｌ／ｇを越えて高粘度になると、メ
ルトブローン法では十分に細化、配向した繊維の繊維流
を形成することができないため、均一性の良い不織布を
得ることができず、得られた不織布は強力が弱く、風合
いの粗硬なものとなってしまう。Furthermore, the degree of polymerization of the polymer also has a large effect on the melt-blown spinnability. That is, the intrinsic viscosity [η] determined by measuring the solution of the saponified ethylene-vinyl acetate copolymer used in the present invention is in the range of 0.055 to 0.085+2/g. And the intrinsic viscosity (?) of the polymer is 0.05
5 (If the melt viscosity is less than 2/g, sufficient spinnability cannot be obtained and a good fiber flow cannot be formed, so a nonwoven fabric with good uniformity cannot be obtained, or there may be The non-woven fabric becomes impractical due to the inclusion of a large number of minute beads, the low strength and stiffness of the non-woven fabric, and the decrease in heat resistance.On the other hand, when the intrinsic viscosity of the polymer [l] When the viscosity exceeds 0.085 l/g, it is not possible to form a fiber stream of sufficiently thinned and oriented fibers using the melt-blowing method, making it impossible to obtain a nonwoven fabric with good uniformity. Non-woven fabrics are not strong and have a rough and hard texture.
更に、重合体中の酢酸ビニルの鹸化度は８５モル％以上
である。鹸化度が８５モル％に満たない重合体ではポリ
ビニルアルコールの特性、即ち、不織布として所望する
触感、腰のある風合いが得られないものとなる。Furthermore, the degree of saponification of vinyl acetate in the polymer is 85 mol% or more. If the degree of saponification of the polymer is less than 85 mol %, the characteristics of polyvinyl alcohol, that is, the tactile feel and stiff texture desired as a nonwoven fabric cannot be obtained.
従って、本発明のメルトブローン法でエチレン−酢酸ビ
ニル共重合体酸化物を主体とした重合体の不織布を製造
するに際し、エチレン−酢酸ビニル共重合体酸化物は、
エチレン含有量４０〜６０モル％、固有粘度［，７）が
０．０５５〜０．０８５Ｃ／ｇにある重合体を用いるこ
とにある。そして、メルトプローン紡糸温度２５０〜３
００°Ｃ１搬送気体圧力（ゲージ圧力） ０−５〜５
Ｋｇ／ ｃｍ２の条件下にメルトブローン法で紡糸する
′ことによって、平均繊維直径８ミクロン以下の極細戦
維が得られ、均一性の良好な繊維流を形成することがで
きる。この繊維流をコンベアーネット上にンート状に捕
集するこ七によって、広幅であっても均一性の良好な不
織布とすることができる。Therefore, when producing a nonwoven fabric made of a polymer mainly composed of ethylene-vinyl acetate copolymer oxide using the melt-blown method of the present invention, the ethylene-vinyl acetate copolymer oxide is
The purpose is to use a polymer having an ethylene content of 40 to 60 mol% and an intrinsic viscosity [,7] of 0.055 to 0.085 C/g. And melt prone spinning temperature 250~3
00°C1 Carrier gas pressure (gauge pressure) 0-5~5
By spinning the fibers by melt-blowing under conditions of Kg/cm2, ultrafine fibers with an average fiber diameter of 8 microns or less can be obtained, and a fiber flow with good uniformity can be formed. By collecting this fiber stream in the form of a belt on a conveyor net, a nonwoven fabric with good uniformity can be obtained even if it has a wide width.
本発明のエチレン−酢酸ビニル共重合体鹸化物を紡糸す
るに際し、他の熱可塑性重合体、例えば、ポリプロピレ
ン、ポリビニルアルコール、ナイロン−６、ナイロン−
６６、ナイロン−６１０などのポリアミド、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などの
ポリエステルを４５重量％以下の量を混合する、顔料あ
るいは顔料をあらかじめ熱可塑性重合体に分散させたマ
スターバッチ、酸化防止剤、紫外線吸収剤、あるいは紡
糸性を良くする、繊維の膠着性を防止するための添加剤
、例えば、酸化チタン、微細酸化ケイ素などを添加混合
することもよい。When spinning the saponified ethylene-vinyl acetate copolymer of the present invention, other thermoplastic polymers such as polypropylene, polyvinyl alcohol, nylon-6, nylon-
66, polyamide such as nylon-610, polyester such as polyethylene terephthalate, polybutylene terephthalate, etc., mixed in an amount of 45% by weight or less, pigment or a masterbatch in which the pigment is pre-dispersed in a thermoplastic polymer, antioxidant, ultraviolet rays An absorbent or an additive for improving spinnability or preventing fiber stickiness, such as titanium oxide or fine silicon oxide, may be added and mixed.
また、本発明のメルトブローン不織布の目付けは、指向
する用途によって決められるが、一般に、ｌＯ〜５００
ｇ／ｍ２の範囲である。例えば、生理用ナプキンの７エ
ーシング、電池用セパレー９−などには低目付けの不織
布を、農業用、土木用、衣料用、医療・衛生品用、工業
用などには中目付けないし高目付けの不織布とする。Furthermore, the basis weight of the melt-blown nonwoven fabric of the present invention is determined depending on the intended use, but is generally lO~500.
g/m2 range. For example, non-woven fabrics with a low basis weight are used for sanitary napkins, separators for batteries, etc., and non-woven fabrics with a medium or high basis weight are used for agricultural, civil engineering, clothing, medical and sanitary products, industrial uses, etc. shall be.
本発明のメルトブローン不織布は、親水性と親油性を有
し、良好な耐薬品性であって、セルロース系繊維に類似
した触感と風合いの、緻密で柔軟な不織布である。The melt-blown nonwoven fabric of the present invention is a dense and flexible nonwoven fabric that is hydrophilic and lipophilic, has good chemical resistance, and has a touch and feel similar to cellulose fibers.
〈実施例〉
次に、本発明の実施態様を具体的な実施例で説明するが
、本発明はこれら実施例に限定されるものではない。な
お、実施例中の部および％はことわりのない限り、重量
に関するものである。<Examples> Next, embodiments of the present invention will be described using specific examples, but the present invention is not limited to these examples. Note that parts and percentages in the examples are by weight unless otherwise specified.
また、本発明の重合体の固有粘度〔ワ〕は、フェノール
８５％、水１５％の混合溶媒に重合体を溶解し、毛細管
粘度計を用いて温度３０°Ｃで測定し、固有粘度（？）
を次式で求めた。In addition, the intrinsic viscosity (W) of the polymer of the present invention is determined by dissolving the polymer in a mixed solvent of 85% phenol and 15% water and measuring it at a temperature of 30°C using a capillary viscometer. )
was calculated using the following formula.
η−＊−（ｔ ｔｏ）／ ｔｏ＝ （ｔ／ ｔｏ）
１（ｖ）＝Ｉｉｍｖ 、ｐ／ ｃ
ただし、し は溶液の流下時間（秒）
ｔｏは溶媒の流下時間（秒）
Ｃは重合体の濃度（ｇ＃ｌ）
実施例１
エチレン含有Ｊｔ４９モル％、鏝化度９８モル％、固有
粘度〔η）−０，０６２Ｑ／ｇのエチレン−酢酸ビニル
共重合体鹸化物をエクストルーダーで溶融し、メルトブ
ローン用ダイに直径０．３ｍｍの吐出孔をｌｎｏ＋＋間
隔で一列に配列したノズル部と、その両側に幅０．２５
ｍｍの気体噴出用スリットを設けたダイを用い、溶融紡
糸温度２８０℃、孔当たりの吐出量０．２ｇ／分で吐出
させ、搬送空気温度２８０℃、空気ゲージ圧Ｉ Ｋｇ／
ｃｍ”の条件でメルトブローン法で紡糸し、紡出極細
繊維流はダイより約２５ｃｍの位置に設置した、一定速
度で走行するベルトコンベアーネット捕集機のネット上
に捕集して、平均目付６５ｇ／ｍ”のメルトブローン不
織布を得た。η−*−(t to)/ to= (t/ to)
1(v)=Iimv, p/c where: is the solution flow time (seconds) to is the solvent flow time (seconds) C is the polymer concentration (g#l) Example 1 Ethylene-containing Jt 49 mol%, A saponified ethylene-vinyl acetate copolymer with a degree of ironing of 98 mol% and an intrinsic viscosity [η)-0,062Q/g was melted in an extruder, and discharge holes with a diameter of 0.3 mm were formed in a melt-blown die at lno++ intervals. Nozzle part arranged in a row and width 0.25 on both sides
Using a die equipped with a mm mm gas ejection slit, the melt-spinning temperature was 280°C, the discharge amount per hole was 0.2 g/min, the conveying air temperature was 280°C, and the air gauge pressure was I kg/
The spun ultra-fine fiber stream was spun using the melt-blown method under the conditions of 1.5 cm", and the spun ultrafine fiber stream was collected on the net of a belt conveyor net collection machine installed at a position approximately 25 cm from the die and running at a constant speed to obtain an average basis weight of 65 g. /m" melt-blown nonwoven fabric was obtained.
このメルトブローン不織布を走査型電子顕微鏡（以下Ｓ
ＥＭと略記する）で５００倍に拡大して観察したところ
、不織布構成繊維の平均直径は約５ミクロンであった。This melt-blown nonwoven fabric was examined under a scanning electron microscope (hereinafter referred to as S).
When observed under 500 times magnification using an EM (abbreviated as EM), the average diameter of the fibers constituting the nonwoven fabric was about 5 microns.
更に、繊維の集積状態は緻密ではあるが柔軟で、木綿の
布帛に類似した触感と風合いを有していた。Furthermore, the fibers were dense but flexible, and had a feel and feel similar to cotton fabric.
このメルトブローン不織布に圧着部面積２０％、線圧力
５ Ｋｇ／ Ｃｍ、ロール温度１００℃、処理速度１０
ｍ／分で四角形品柄模様のエンボスカレンダーロールで
プレス処理を行った。得られた不織布は強力が高く、湿
布薬の基材として使用したところ、触感、肌触り、そし
て薬剤とのなじみ性が良く、更に耐薬品性に優れていた
。This melt-blown non-woven fabric has a crimped area of 20%, a linear pressure of 5 Kg/Cm, a roll temperature of 100°C, and a processing speed of 10%.
Pressing was carried out using an embossed calendar roll with a square pattern at a speed of m/min. The obtained nonwoven fabric had high strength, and when used as a base material for poultices, it had good texture, texture, and compatibility with drugs, and was also excellent in chemical resistance.
また、活性剤を含有させてワイピングクロスとしても有
用なものであった。It was also useful as a wiping cloth by containing an activator.
比較例１
エチレン含有量４９モル％、鹸化度９８％、固有粘度〔
す）−０，０９２ｆｆ／ｇのエチレン−酢酸ビニル共重
合体鹸化物を実施例１と同じ装置でメルトプローン法紡
糸を行った。しかし、実施例１と同一条件では十分な紡
糸性が得られないため、紡糸温度を３００°Ｃ１搬送空
気温度３００℃、空気ゲージ圧５ Ｋｇ／ ｃｍ”に変
更して紡糸した。しかし、溶融粘度が高くて十分に細化
した繊維が得られず、繊維の太さは不揃いで、細い繊維
でも平均直径が約ｌミクロンもあり、しかも均一性の良
い繊維流は得られなかった。また、得られた不織布は粗
硬であって、強力も弱く湿布用基剤としては適しないも
のであった。Comparative Example 1 Ethylene content 49 mol%, degree of saponification 98%, intrinsic viscosity [
-0,092 ff/g saponified ethylene-vinyl acetate copolymer was subjected to melt-prone spinning using the same apparatus as in Example 1. However, sufficient spinnability could not be obtained under the same conditions as in Example 1, so the spinning temperature was changed to 300°C, the conveying air temperature was 300°C, and the air gauge pressure was 5 Kg/cm.However, the melt viscosity The fiber thickness was high and it was not possible to obtain sufficiently fine fibers, the thickness of the fibers was uneven, and even the thin fibers had an average diameter of about 1 micron, and a uniform fiber flow could not be obtained. The resulting nonwoven fabric was coarse and hard, and had low strength, making it unsuitable as a base for poultices.
比較例２
エチレン含有量４９モル％、酸化度９８％、固有粘度（
ｖ）−０，０５１Ｑ／ｇのエチレン−酢酸ビニル共重合
体鹸化物を実施例１と同じ装置でメルトブローン法紡糸
を行った。しかし、実施例１と同一条件では十分な紡糸
性が得られないｔ；め、紡糸温度を２６０°Ｃ１搬送空
気温度２７０°Ｃ１空気ゲージ圧０ 、５ Ｋｇ／ ｃ
ｍ２まで低くした緩やかな紡糸条件で紡糸したにも拘わ
らず、均一性の良い繊維流は形成されず、繊維の集積む
らが大きく、しかも、不織布中には多数の玉状物が混入
し、不織布の触感はざらついたものとなり、実用性に乏
しいものであった。Comparative Example 2 Ethylene content 49 mol%, oxidation degree 98%, intrinsic viscosity (
v) A saponified ethylene-vinyl acetate copolymer of -0,051 Q/g was subjected to melt-blown spinning using the same apparatus as in Example 1. However, sufficient spinnability could not be obtained under the same conditions as in Example 1; therefore, the spinning temperature was set to 260°C, the conveying air temperature was 270°C, and the air gauge pressure was 0.5 Kg/c.
Even though spinning was carried out under gentle spinning conditions at a low speed of m2, a highly uniform fiber stream was not formed, the accumulation of fibers was highly uneven, and a large number of beads were mixed into the nonwoven fabric. It had a rough texture and was not practical.
比較例３
エチレン含有量３８モル％、鹸化度９８％、固有粘度（
ｖ）−０，０６２０７ｇのエチレン−酢酸ビニル共重合
体鹸化物を実施例１と同じ装置でメルトブローン法紡糸
を行った。そして、紡糸条件を実施例１と同一にして紡
糸したところ、２時間程度の短時間では紡糸性に異常が
なかったが、それ以上の長時間になるとメルトブローン
による曳糸性が急速に低下し、断糸が多発し、未溶粒物
が付着した切断繊維片が不織布に混在してきて安定に紡
糸することができなくなった。Comparative Example 3 Ethylene content 38 mol%, saponification degree 98%, intrinsic viscosity (
v)-0,06207 g of saponified ethylene-vinyl acetate copolymer was subjected to melt-blown spinning using the same apparatus as in Example 1. Then, when spinning was performed under the same spinning conditions as in Example 1, there was no abnormality in spinnability for a short time of about 2 hours, but when the time was longer than that, the spinnability due to melt blowing rapidly decreased. Yarn breakage occurred frequently, and cut fiber pieces with undissolved particles adhering to them became mixed in the nonwoven fabric, making stable spinning impossible.
比較例４
エチレン含有量６３モル％、鹸化度９８％、固有粘度（
ｖ ） −０，０６１Ｑ／ｇのエチレン−酢酸ビニル共
重合体鹸化物を実施例１と同じ装置でメルトブローン法
紡糸を行った。そして、紡糸条件を実施例１と同一にし
て紡糸したところ、紡糸性には問題はなかったが、得ら
れた不織布は柔軟でって、しかも腰と、厚み感のないも
のであった。更に、耐熱温度が低く、強力の小さい不織
布である。Comparative Example 4 Ethylene content 63 mol%, saponification degree 98%, intrinsic viscosity (
v) A saponified ethylene-vinyl acetate copolymer of -0,061 Q/g was subjected to melt-blown spinning using the same apparatus as in Example 1. When spinning was carried out under the same spinning conditions as in Example 1, there was no problem with spinnability, but the obtained nonwoven fabric was flexible, yet stiff and lacked thickness. Furthermore, it is a nonwoven fabric with a low heat resistance and low strength.
実施例２
エチレン含有量４９モル％、鹸化度９８％、固有粘度（
ｖ ） −０，０６２Ｑ／ｇのエチレン−酢酸ビニル共
重合体鹸化物３９部に、ベージュ色の顔料を２０％含有
するポリプロピレンを１部とを混練して実施例１と同じ
装置でメルトブローン法紡糸を行った。紡糸条件を実施
例１と同一にして紡糸したが、紡糸性は良好で、色の濃
淡斑のないベージュ色に着色した均一性の良いメルトブ
ローン不織布が得られた。Example 2 Ethylene content 49 mol%, degree of saponification 98%, intrinsic viscosity (
v) 39 parts of a saponified ethylene-vinyl acetate copolymer of -0,062Q/g was kneaded with 1 part of polypropylene containing 20% beige pigment, and the mixture was melt-blown spun using the same equipment as in Example 1. I did it. Spinning was carried out under the same spinning conditions as in Example 1, and the spinnability was good, and a melt-blown nonwoven fabric with good uniformity and a beige color without unevenness in color was obtained.
この不織布をＳＥＭで観察すると、繊維の平均直径は約
５ミクロンであり、不織布は木綿で作られた布帛の触感
と風合いを有していた。When this nonwoven fabric was observed using a SEM, the average diameter of the fibers was approximately 5 microns, and the nonwoven fabric had the feel and feel of a fabric made of cotton.
この不織布に織り目模様の彫刻を施したエンボスロール
を用いて、ロール温度１００℃、線圧力３Ｋｇ／ａｍで
エンボスを行った。得られた不織布は肌触りがよく衣料
用として好適なものであった。Embossing was performed at a roll temperature of 100° C. and a line pressure of 3 kg/am using an embossing roll on which a texture pattern was engraved on the nonwoven fabric. The obtained nonwoven fabric had a good feel and was suitable for use in clothing.
〈発明の効果〉
本発明のエチレン−酢酸ビニル共重合体酸化物のメルト
ブローン不織布は十分に細化し、配向した繊維からなる
均一性の良い不織布であって、セルロース系繊維、とり
わけ木綿で作られた布帛様の触感と風合いを有すし、緻
密であって柔軟な不織布である。<Effects of the Invention> The melt-blown nonwoven fabric of ethylene-vinyl acetate copolymer oxide of the present invention is a highly uniform nonwoven fabric made of sufficiently finely oriented fibers, and is made of cellulose fibers, especially cotton. It is a dense and flexible nonwoven fabric that has a cloth-like feel and texture.
本発明のメルトブローン不織布は、耐溶剤性で親水性と
親油性の特性、を有しているため、広範囲の用途展開に
有用な不織布である。The melt-blown nonwoven fabric of the present invention has solvent resistance, hydrophilicity, and lipophilic properties, so it is a useful nonwoven fabric for a wide range of applications.
特許出願人 株式会社 り ラ しPatent applicant RiRashi Co., Ltd.
Claims (2)
化度８５モル％以上で、かつ固有粘度〔η〕が０．０５
５〜０．０８５ｌ／ｇの範囲にあるエチレン−酢酸ビニ
ル共重合体鹸化物を主体とした重合体の平均繊維直径８
ミクロン以下のメルトブローン極細繊維不織布であるこ
とを特徴とするエチレン−ビニルアルコール系共重合体
繊維不織布。(1) Ethylene content of 40 to 60 mol%, vinyl acetate saponification degree of 85 mol% or more, and intrinsic viscosity [η] of 0.05
Average fiber diameter of polymer mainly composed of saponified ethylene-vinyl acetate copolymer in the range of 5 to 0.085 l/g 8
An ethylene-vinyl alcohol copolymer fibrous nonwoven fabric characterized by being a meltblown ultrafine fibrous nonwoven fabric of micron size or less.
エチレン含有量４０〜６０モル％、酢酸ビニル鹸化度８
５モル％以上で、かつ固有粘度〔η〕が０．０５５〜０
．０８５ｌ／ｇの範囲にある重合体を主体とした重合体
を溶融し、メルトブローン法で紡糸して極細繊維流を形
成し、該繊維流をシート状に捕集して不織布とすること
を特徴とするエチレン−ビニルアルコール系共重合体繊
維不織布の製造法。(2) In the saponified ethylene-vinyl acetate copolymer,
Ethylene content 40-60 mol%, vinyl acetate saponification degree 8
5 mol% or more, and the intrinsic viscosity [η] is 0.055 to 0
．． The method is characterized by melting a polymer mainly consisting of a polymer in the range of 0.85 l/g, spinning it using a melt blowing method to form an ultrafine fiber stream, and collecting the fiber stream in a sheet form to make a nonwoven fabric. A method for producing an ethylene-vinyl alcohol copolymer fibrous nonwoven fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63333787A JPH0672350B2 (en) | 1988-12-27 | 1988-12-27 | Ethylene-vinyl alcohol copolymer fiber non-woven fabric and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63333787A JPH0672350B2 (en) | 1988-12-27 | 1988-12-27 | Ethylene-vinyl alcohol copolymer fiber non-woven fabric and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02175961A true JPH02175961A (en) | 1990-07-09 |
| JPH0672350B2 JPH0672350B2 (en) | 1994-09-14 |
Family
ID=18269952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63333787A Expired - Fee Related JPH0672350B2 (en) | 1988-12-27 | 1988-12-27 | Ethylene-vinyl alcohol copolymer fiber non-woven fabric and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0672350B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001003255A (en) * | 1999-06-23 | 2001-01-09 | Kuraray Co Ltd | Water soluble non-woven fabric for packing agrochemical |
| JP2001003249A (en) * | 1999-06-23 | 2001-01-09 | Kuraray Co Ltd | Water soluble nonwoven fabric for packing detergent |
| JP2002227031A (en) * | 2001-01-31 | 2002-08-14 | Kuraray Co Ltd | Fiber for separator |
| WO2006018969A1 (en) * | 2004-08-02 | 2006-02-23 | Kuraray Co., Ltd. | Multilayer sheet |
| JP2006316002A (en) * | 2005-05-13 | 2006-11-24 | Kanebo Ltd | Cosmetic material impregnated in nonwoven fabric |
-
1988
- 1988-12-27 JP JP63333787A patent/JPH0672350B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001003255A (en) * | 1999-06-23 | 2001-01-09 | Kuraray Co Ltd | Water soluble non-woven fabric for packing agrochemical |
| JP2001003249A (en) * | 1999-06-23 | 2001-01-09 | Kuraray Co Ltd | Water soluble nonwoven fabric for packing detergent |
| JP2002227031A (en) * | 2001-01-31 | 2002-08-14 | Kuraray Co Ltd | Fiber for separator |
| WO2006018969A1 (en) * | 2004-08-02 | 2006-02-23 | Kuraray Co., Ltd. | Multilayer sheet |
| JP2006316002A (en) * | 2005-05-13 | 2006-11-24 | Kanebo Ltd | Cosmetic material impregnated in nonwoven fabric |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0672350B2 (en) | 1994-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4599366B2 (en) | A flexible and extensible nonwoven web containing fibers with high melt flow rate | |
| KR100798966B1 (en) | Soft Polypropylene Melt Spun Nonwoven Fabric | |
| US8129298B2 (en) | Nonwoven laminates and process for producing the same | |
| JP5450055B2 (en) | Mixed long fiber nonwoven fabric and method for producing the same | |
| JP5717769B2 (en) | Spunbond nonwoven fabric | |
| JPH02289159A (en) | Flexible nonwoven fabric of continuous fiber | |
| JP2004532939A (en) | Stretchable fibers and nonwovens made from large denier splittable fibers | |
| EP1044295A1 (en) | Nonwoven webs having improved softness and barrier properties | |
| WO2005042824A1 (en) | Ultrafine fiber nonwoven fabric and process for producing the same | |
| JP2004285538A (en) | Method for producing polymer alloy filament and method for producing nano fiber | |
| JPH02175961A (en) | Nonwoven fabric of ethylene-vinyl alcohol copolymer fiber and production thereof | |
| EP3964620A1 (en) | Melt-blown nonwoven fabric, filter, and method for producing melt-blown nonwoven fabric | |
| JP4368490B2 (en) | Nonwoven fabric composed of multicomponent long fibers and method for producing the same | |
| JP2007321309A (en) | Highly functional nonwoven fabric, method for producing the same and use thereof | |
| JPH02264057A (en) | Nonwoven fabric and production thereof | |
| JPS63243324A (en) | Heat bonding fiber and nonwoven fabric thereof | |
| JPS59216915A (en) | Ultrafine fiber structure and production thereof | |
| JP2005531699A (en) | Spinneret and fiber manufacturing method | |
| JPH1161618A (en) | Ultrafine fiber nonwoven fabric and its production | |
| JP2002088630A (en) | Weather-resistant filament nonwoven fabric | |
| JPH02242959A (en) | Bandage of unwoven fabric and production thereof | |
| JP2642188B2 (en) | Adhesive base material and method for producing the same | |
| JP2003041471A (en) | Thermoplastic polyvinyl alcohol/polyolefin-based nonwoven fabric, and method for producing the same | |
| JPH0571006A (en) | Ultra-fine fiber-producible fiber | |
| EP0843753A1 (en) | Continuous filament nonwoven fabric |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |