JP3710588B2 - Cross-linked nonwoven fabric - Google Patents
Cross-linked nonwoven fabric Download PDFInfo
- Publication number
- JP3710588B2 JP3710588B2 JP6388397A JP6388397A JP3710588B2 JP 3710588 B2 JP3710588 B2 JP 3710588B2 JP 6388397 A JP6388397 A JP 6388397A JP 6388397 A JP6388397 A JP 6388397A JP 3710588 B2 JP3710588 B2 JP 3710588B2
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- fiber
- active energy
- crosslinked
- energy rays
- 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.)
- Expired - Fee Related
Links
- 239000004745 nonwoven fabric Substances 0.000 title claims description 73
- 239000000835 fiber Substances 0.000 claims description 58
- 238000000034 method Methods 0.000 claims description 25
- -1 polybutylene succinate Polymers 0.000 claims description 24
- 229920005989 resin Polymers 0.000 claims description 21
- 239000011347 resin Substances 0.000 claims description 21
- 239000000178 monomer Substances 0.000 claims description 17
- 239000011342 resin composition Substances 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 16
- 238000009987 spinning Methods 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 10
- 239000007983 Tris buffer Substances 0.000 claims description 9
- 230000001678 irradiating effect Effects 0.000 claims description 9
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims description 9
- 229920002961 polybutylene succinate Polymers 0.000 claims description 9
- 239000004631 polybutylene succinate Substances 0.000 claims description 9
- 229920001610 polycaprolactone Polymers 0.000 claims description 9
- 239000004632 polycaprolactone Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 9
- 238000004132 cross linking Methods 0.000 claims description 5
- 239000008188 pellet Substances 0.000 description 8
- 230000006870 function Effects 0.000 description 7
- 239000002904 solvent Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000032798 delamination Effects 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000003999 initiator Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012567 medical material Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 229920006038 crystalline resin Polymers 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000012784 inorganic fiber Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- BPXVHIRIPLPOPT-UHFFFAOYSA-N 1,3,5-tris(2-hydroxyethyl)-1,3,5-triazinane-2,4,6-trione Chemical compound OCCN1C(=O)N(CCO)C(=O)N(CCO)C1=O BPXVHIRIPLPOPT-UHFFFAOYSA-N 0.000 description 1
- YIJYFLXQHDOQGW-UHFFFAOYSA-N 2-[2,4,6-trioxo-3,5-bis(2-prop-2-enoyloxyethyl)-1,3,5-triazinan-1-yl]ethyl prop-2-enoate Chemical compound C=CC(=O)OCCN1C(=O)N(CCOC(=O)C=C)C(=O)N(CCOC(=O)C=C)C1=O YIJYFLXQHDOQGW-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920001410 Microfiber Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 206010040880 Skin irritation Diseases 0.000 description 1
- 244000028419 Styrax benzoin Species 0.000 description 1
- 235000000126 Styrax benzoin Nutrition 0.000 description 1
- 235000008411 Sumatra benzointree Nutrition 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 229960002130 benzoin Drugs 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000019382 gum benzoic Nutrition 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 230000036556 skin irritation Effects 0.000 description 1
- 231100000475 skin irritation Toxicity 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- YRHRIQCWCFGUEQ-UHFFFAOYSA-N thioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3SC2=C1 YRHRIQCWCFGUEQ-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Landscapes
- Chemical Or Physical Treatment Of Fibers (AREA)
- Nonwoven Fabrics (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、活性エネルギー線照射によって架橋した不織布に関し、更に詳しくは、架橋により形状記憶性、剛性、引裂強度、層間剥離抵抗、耐溶剤性および風合等が改良された生活材料や医療材料等に有用な架橋不織布に関する。なお、本発明において架橋とは、不織布を構成している樹脂の分子が架橋していることをいう。
【０００２】
【従来の技術】
結晶性樹脂に、活性エネルギー線を照射し分子間架橋を形成させる技術は広く知られている。例えば、ポリエチレンに活性エネルギー線を照射して分子間架橋を形成させたものは、電線やケーブルの被覆に実用化されている。また、結晶性樹脂の架橋により、形状記憶性が現れることも知られている。
【０００３】
一方、不織布には、主に、ポリエチレン、ポリプロピレン等のポリオレフィン、ＰＥＴ等のポリエステル樹脂、アクリル系、ビニロン、アラミド系、ポリウレタン系等の合成繊維、木綿、麻、羊毛、木材パルプ等の天然繊維、レーヨン、キュプラ等の再生繊維、ガラス、炭素、アルミナ、金属等の無機繊維等を原料にした様々な組み合わせがあり、加工製造方法によって多種多様な製品が製造され、様々の用途に利用されている。
【０００４】
【発明が解決しようとする課題】
しかしながら、従来の不織布は選択により種々の機能が得られるが、近年の高機能化の要請を必ずしも十分に満足するものではない。例えば、合成繊維を用いる不織布では、剛性、引裂、強度、層間、剥離抵抗や耐溶剤性等は無機繊維には、遠くおよばない。その一方、従来の不織布は、一般に生産性や風合等に優れるため、より強度や耐溶剤性、耐熱性を有する不織布を得る開発が遅れている。
【０００５】
【課題を解決するための手段】
本発明者は、より強度、耐用性、耐熱性に優れる不織布について鋭意検討した結果、不織布用の原料樹脂や特定の架橋性モノマーを配合した樹脂組成物に活性エネルギー線を照射すると、極めて優れた剛性、引裂強度が得られ、不織布も形状記憶性を獲得すること、および成形加工条件の変更や溶融時の保型性が向上し、不織布もかさ高さや風合に優れ、かつ吸水性やフィルター機能等の機能が向上する事を見い出し、本発明を完成するに至った。
【０００６】
即ち、本発明の第１は、不織布用繊維原料樹脂（Ａ）としてのポリブチレンサクシネートとポリカプロラクトンの混合物１００重量部と活性エネルギー線照射で該原料樹脂の分子鎖を拘束できる架橋性モノマー（Ｂ）としてのトリス（アクリロキシエチル）イソシアヌレート０．１〜３０重量部とからなる架橋性樹脂組成物を紡糸して繊維を得、これを加工して不織布とし、次いで活性エネルギー線を照射して得られることを特徴とする架橋不織布を提供する。
本発明の第２は、不織布に活性エネルギー線を照射して架橋させ、形状を記憶させた形状記憶架橋不織布である本発明の第１に記載の架橋不織布を提供する。
本発明の第３は、不織布用繊維原料樹脂（Ａ）としてのポリブチレンサクシネートとポリカプロラクトンの混合物１００重量部と活性エネルギー線照射で該原料樹脂の分子鎖を拘束できる架橋性モノマー（Ｂ）としてのトリス（アクリロキシエチル）イソシアヌレート０．１〜３０重量部とからなる架橋性樹脂組成物を紡糸して繊維を得、次いで活性エネルギー線を照射して架橋繊維とし、この架橋繊維を加工したことを特徴とする架橋不織布を提供する。
本発明の第４は、紡糸が溶融ブローである本発明の第１〜３のいずれかに記載の架橋不織布を提供する。
本発明の第５は、架橋繊維の加工がスパンボンドプロセスであることを特徴とする本発明の第３記載の架橋不織布を提供する。
本発明の第６は、熱融着性の不織布用繊維原料樹脂（Ａ）としてのポリブチレンサクシネートとポリカプロラクトンの混合物１００重量部と活性エネルギー線照射で該原料樹脂の分子鎖を拘束できる架橋性モノマー（Ｂ）としてのトリス（アクリロキシエチル）イソシアヌレート０．１〜３０重量部とからなる熱融着性架橋性樹脂組成物を紡糸して得た繊維を含む繊維を、
（ｉ）加工して不織布とし、次いで活性エネルギー線を照射してなる、又は、
（ii）活性エネルギー線を照射して架橋繊維とし、この架橋繊維を加工してなる
架橋不織布を提供する。
【０００７】
【発明の実施の形態】
本発明で使用する不織布は、活性エネルギー線の照射により形状を記憶し得る繊維を少なくとも一部に含む不織布であれば特に制限がないが、不織布用繊維原料樹脂（Ａ）としてのポリブチレンサクシネートとポリカプロラクトンの混合物と活性エネルギー線照射で該原料樹脂の分子鎖を拘束できる架橋性モノマー（Ｂ）としてのトリス（アクリロキシエチル）イソシアヌレートとからなる架橋性樹脂組成物から加工製造して得た繊維を一部に含む不織布であることが好ましい。
【０００８】
不織布用繊維原料樹脂（Ａ）としては、ポリブチレンサクシネートとポリカプロラクトンの混合物が挙げられる。
【０００９】
熱融着性の繊維を不織布の一部に配合すると、クロスオーバーポイント接着に優れる不織布を得ることができる。
【００１０】
活性エネルギー線照射で不織布用繊維原料（Ａ）の分子鎖を拘束できる架橋性モノマー（Ｂ）としては、活性エネルギー線の照射によって、ラジカル等の活性反応点を複数有する事が可能な化合物を示し、多官能アクリル系モノマーが例示できる。
【００１１】
具体的には、多官能アクリル系モノマーとして、トリス（アクリロキシエチル）イソシアヌレート（トリス（２−ヒドロキシエチル）イソシアヌル酸のトリアクリル酸エステル）が挙げられ、このものは皮膚刺激性が低く好ましい。
【００１２】
架橋性樹脂組成物は、不織布用繊維原料（Ａ）１００重量部に対し、架橋性モノマー（Ｂ）０．１〜３０重量部を配合したものであることが好ましく、より好ましくは、架橋性モノマーを０．２〜２０重量部、更に好ましくは０．３〜１０重量部を配合したものである。架橋性モノマー（Ｂ）の配合量が０．１重量部未満の場合は、結晶性ポリマー（Ａ）の分子鎖を拘束するには不十分である。その一方、３０重量部を越える場合には、得られる架橋不織布が剛直になりすぎて、風合等が悪化する傾向があるため好ましくない。
【００１３】
架橋性樹脂組成物には、必要に応じて開始剤、触媒、安定剤等を添加することができ、これら開始剤、触媒、安定剤等は架橋性モノマー（Ｂ）に添加してもよいし、不織布用繊維原料樹脂（Ａ）に添加してもよい。活性エネルギー線照射によって架橋できれば特に制限を受けない。
【００１４】
配合し得る開始剤としては、活性エネルギー線に紫外線を用いる場合はアセトフェノン系、ベンゾイン系、ベンゾフェノン系、チオキサンソン系等の光開始剤や光開始助剤が例示できる。
【００１５】
本発明の架橋性不織布の製造は、上記架橋性樹脂組成物からペレットを得、紡糸し、不織布に加工する工程が含まれる。
架橋性樹脂組成物からペレットを得るには、一般的なペレットの製造方法をそのまま採用することができる。また、架橋性樹脂組成物自体から、または得られたペレットから紡糸して繊維を得る工程も、通常の繊維紡糸プロセスを採用することができ、更にフラッシュ紡糸法や、紡糸工程と開繊工程および分散工程が１工程に集約されたタイプの溶融ブロー法を採用することもできる。
繊維から不織布に加工する工程として、公知の湿式法や乾式法の他、これらに含まれるエアレイパルプ法、スパンレース法、溶融（メルト）ブロー法、スパンボンド法のいずれも採用することができる。また、接着交絡工程として、カレンダー加工熱接着、サーマルボンド熱接着、接着剤による接着、ニードルパンチ交絡、流体交絡等を採用することができる。
【００１６】
本発明で使用する活性エネルギー線としては、電磁波、電子線、粒子線及びこれらの組み合わせが挙げられる。電磁波としては、γ線、紫外線、Ｘ線が挙げられる。これらの活性エネルギー線は、公知の装置を用いて照射することができる。
本発明では、ペレット、繊維、不織布に活性エネルギー線を照射するが、好ましい照射量は、以下の通りである。
電磁波としてγ線を使用する場合には、０．１〜３０ＭＲａｄであることが好ましい。
電子線の場合の加速電圧としては１００〜５，０００ＫＶ、照射線量としては０．１〜３０ＭＲａｄの範囲が適当である。
【００１７】
本発明では架橋性樹脂組成物から得たペレット、繊維、不織布のいずれに活性エネルギー線を照射することもできる。
【００１８】
本発明によって架橋性樹脂組成物からペレットを得て、このペレットに活性エネルギー線を照射し、次いで紡糸、不織布加工する方法によれば、繊維径の細い繊維を得ることができ、この繊維を用いて風合いに優れる不織布を製造することができる。
【００１９】
架橋性樹脂組成物から得た繊維に活性エネルギー線を照射し、架橋繊維を得た後に不織布に加工する方法では、スパンボンドプロセスで架橋繊維を使用すると、繊維の形状記憶性、剛性が向上するばかりでなく、高速かつ高シェアで延伸できるため樹脂が高配向に結晶化し、強度に優れた極細繊維を生産性よく不織布に加工することができる。特に、解繊、分散、捕集、移送、接着連結の各工程の生産性が向上する。接着工程で熱融着性架橋繊維を使用すると、クロスオーバーポイント接着に優れ、かつ風合や吸水性に優れる架橋不織布を得ることができる。なお、不織布に加工する繊維の一部のみに架橋繊維を使用してもよい。
【００２０】
さらに、架橋性樹脂組成物から得た繊維には活性エネルギー線を照射せず、不織布に加工した後にこの不織布に活性エネルギー線を照射する方法では、形状記憶性、剛性、引裂強度、層間剥離抵抗、耐溶剤性、風合いが優れ、かつ吸水性やフィルター機能性、洗濯性、抗菌性等の機能が向上した架橋不織布を製造することができる。特に、メルトブロープロセスで得た不織布は、繊維径が極めて細く風合や吸水性等の機能に優れるが、引裂強度が低い欠点がある。しかし、得られた不織布に活性エネルギー線を照射することによりこの欠点が改善され、特に引き裂き強度に優れる架橋不織布が得られる。
【００２１】
本発明の架橋不織布は、架橋により形状記憶性、剛性、引裂強度、層間剥離抵抗、耐溶剤性および風合等が改良されている。また、成形加工条件の変更や溶融時の保型性が向上する等の理由から、かさ高さや風合に優れ、加えて吸水性やフィルター機能等の機能が向上した架橋性不織布が得られる。このため、紙オムツ、ナプキン等の衛生材、フィルター等の工業材料、カーペット等の生活材料、その他医療材料等に幅広く使用することができる。
【００２２】
【実施例】
以下、実施例により本発明を具体的に説明するが、本発明はこれらに限定されるものではない。なお「％」は、特に示す場合を除くほか「重量％」を示す。
【００２３】
（実施例）
ポリブチレンサクシネート（昭和高分子（株）製「ビオノーレ１００１」）とポリカプロラクトン（ダイセル化学工業（株）製「ＰＣＬＨ７」）の７／３混合物１００重量部に対して、架橋性モノマー（Ｂ）として、トリス（アクリロキシエチル）イソシアヌレート（日立化成（株）製「ファンクリルＦＡ−７３１Ａ」）を５重量部を配合し、溶融紡糸した。次いで、この溶融紡糸繊維に、加速電圧５０００ＫＶ、照射線量２ＭＲａｄのγ線を照射し架橋繊維とした。
一方、ポリエチレンテレフタレート樹脂を紡糸して繊維を得、この繊維と上記熱融着架橋繊維とをエアージェット（ａｉｒ ｊｅｔ）を用いて５，０００ｍ／ｍｉｎの速度で牽引細分化冷却し、衝撃板を用いて開繊・分散させ、空気を用いて捕集・移送し、連続熱風処理法（Ｔｈｒｕ−ａｉｒ法）により接着して不織布を得た。
不織布は、溶融後も繊維形状を維持し、繊維同士の交点のみが接着されクロスオーバーポイント接着性に優れ、このためバルキーかつ風合の優れた不織布が得られた。
【００２４】
（比較例）
架橋性モノマー（Ｂ）を使用しない以外は実施例と同様にして不織布を得たが、Ｔｈｒｕ−ａｉｒ接着時に、熱融着繊維の繊維形状が維持できず、不織布が板状に融着した。
【００２５】
【発明の効果】
本発明によれば、形状記憶性、剛性、引裂強度、層間剥離抵抗、耐溶剤性および風合等が改良された生活材料や医療材料等に有用な架橋不織布が提供される。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a nonwoven fabric cross-linked by irradiation with active energy rays, and more specifically, living materials and medical materials whose shape memory property, rigidity, tear strength, delamination resistance, solvent resistance and texture are improved by cross-linking. The present invention relates to a cross-linked non-woven fabric useful for. In the present invention, the term “crosslinking” means that the resin molecules constituting the nonwoven fabric are crosslinked.
[0002]
[Prior art]
A technique for forming an intermolecular crosslink by irradiating an active energy ray to a crystalline resin is widely known. For example, polyethylene obtained by irradiating active energy rays to form intermolecular crosslinks has been put into practical use for covering electric wires and cables. It is also known that shape memory properties appear due to crosslinking of the crystalline resin.
[0003]
On the other hand, non-woven fabrics mainly include polyolefins such as polyethylene and polypropylene, polyester resins such as PET, synthetic fibers such as acrylic, vinylon, aramid, and polyurethane, natural fibers such as cotton, hemp, wool, and wood pulp, There are various combinations made from recycled fibers such as rayon and cupra, and inorganic fibers such as glass, carbon, alumina, and metals, and a wide variety of products are manufactured by various processing and manufacturing methods. .
[0004]
[Problems to be solved by the invention]
However, the conventional nonwoven fabric can obtain various functions by selection, but it does not necessarily satisfy the recent demand for higher functionality. For example, in a nonwoven fabric using synthetic fibers, rigidity, tearing, strength, interlayer, peeling resistance, solvent resistance, and the like are not far from those of inorganic fibers. On the other hand, since conventional nonwoven fabrics are generally excellent in productivity, texture, etc., development for obtaining nonwoven fabrics having higher strength, solvent resistance, and heat resistance is delayed.
[0005]
[Means for Solving the Problems]
As a result of earnestly examining the nonwoven fabric having superior strength, durability, and heat resistance, the present inventors have found that when the active energy ray is irradiated to the resin composition containing the raw material resin for the nonwoven fabric and the specific crosslinkable monomer, it is extremely excellent. Rigidity and tear strength are obtained, and the nonwoven fabric also has shape memory properties, and the molding process conditions are changed and the shape retention during melting is improved. The nonwoven fabric also has excellent bulkiness and texture, and absorbs water and filters. It has been found that functions such as functions are improved, and the present invention has been completed.
[0006]
That is, the first of the present invention is a cross-linkable monomer (100 parts by weight of a mixture of polybutylene succinate and polycaprolactone as a fiber raw material resin (A) for nonwoven fabric and a crosslinkable monomer that can restrain the molecular chain of the raw material resin by irradiation with active energy rays ( A fiber is obtained by spinning a crosslinkable resin composition comprising 0.1 to 30 parts by weight of tris (acryloxyethyl) isocyanurate as B), which is processed into a nonwoven fabric, and then irradiated with active energy rays. The present invention provides a crosslinked nonwoven fabric obtained by
A second aspect of the present invention provides the crosslinked nonwoven fabric according to the first aspect of the present invention, which is a shape memory crosslinked nonwoven fabric in which a nonwoven fabric is irradiated with active energy rays to be crosslinked and memorized in shape.
The third aspect of the present invention is that 100 parts by weight of a mixture of polybutylene succinate and polycaprolactone as a fiber raw material resin (A) for nonwoven fabric and a crosslinkable monomer (B) capable of constraining the molecular chain of the raw material resin by irradiation with active energy rays. A fiber is obtained by spinning a crosslinkable resin composition consisting of 0.1 to 30 parts by weight of tris (acryloxyethyl) isocyanurate as, and then irradiated with active energy rays to form a crosslinked fiber. A crosslinked nonwoven fabric characterized by the above is provided.
4th of this invention provides the crosslinked nonwoven fabric in any one of 1st-3rd of this invention whose spinning is a melt blow.
A fifth aspect of the present invention provides the crosslinked nonwoven fabric according to the third aspect of the present invention, wherein the processing of the crosslinked fiber is a spunbond process.
A sixth aspect of the present invention is a crosslinkable material capable of constraining the molecular chain of the raw material resin by irradiation with active energy rays with 100 parts by weight of a mixture of polybutylene succinate and polycaprolactone as the heat-fusible nonwoven fiber raw material resin (A). A fiber containing a fiber obtained by spinning a heat-fusible crosslinkable resin composition comprising 0.1 to 30 parts by weight of tris (acryloxyethyl) isocyanurate as a polymerizable monomer (B),
(I) processed into a non-woven fabric and then irradiated with active energy rays, or
(Ii) A crosslinked nonwoven fabric obtained by irradiating active energy rays to form a crosslinked fiber and processing the crosslinked fiber is provided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The non-woven fabric used in the present invention is not particularly limited as long as it is a non-woven fabric containing at least part of fibers that can memorize the shape by irradiation with active energy rays, but polybutylene succinate as a non-woven fabric fiber resin (A). Obtained by processing and manufacturing from a crosslinkable resin composition comprising a mixture of polycaprolactone and tris (acryloxyethyl) isocyanurate as a crosslinkable monomer (B) capable of constraining the molecular chain of the raw material resin by irradiation with active energy rays It is preferable that it is the nonwoven fabric which contains a part of fiber.
[0008]
Examples of the fiber raw material resin (A) for nonwoven fabric include a mixture of polybutylene succinate and polycaprolactone.
[0009]
When heat-fusible fibers are blended in a part of the nonwoven fabric, a nonwoven fabric excellent in crossover point adhesion can be obtained.
[0010]
As the crosslinkable monomer (B) capable of constraining the molecular chain of the non-woven fabric fiber material (A) by irradiation with active energy rays, a compound capable of having a plurality of active reaction points such as radicals by irradiation with active energy rays is shown. And polyfunctional acrylic monomers.
[0011]
Specific examples of the polyfunctional acrylic monomer include tris (acryloxyethyl) isocyanurate (triacrylic acid ester of tris (2-hydroxyethyl) isocyanuric acid), which is preferable because of low skin irritation.
[0012]
The crosslinkable resin composition is preferably one in which 0.1 to 30 parts by weight of the crosslinkable monomer (B) is blended with 100 parts by weight of the fiber raw material for nonwoven fabric (A), more preferably the crosslinkable monomer. 0.2 to 20 parts by weight, more preferably 0.3 to 10 parts by weight. When the blending amount of the crosslinkable monomer (B) is less than 0.1 parts by weight, it is insufficient to restrain the molecular chain of the crystalline polymer (A). On the other hand, when the amount exceeds 30 parts by weight, the obtained crosslinked nonwoven fabric becomes too rigid and the texture and the like tend to deteriorate, which is not preferable.
[0013]
An initiator, a catalyst, a stabilizer, and the like can be added to the crosslinkable resin composition as necessary. These initiator, catalyst, stabilizer, and the like may be added to the crosslinkable monomer (B). The fiber raw material resin (A) for nonwoven fabric may be added. If it can bridge | crosslink by active energy ray irradiation, there will be no restriction | limiting in particular.
[0014]
Examples of initiators that can be blended include acetophenone-based, benzoin-based, benzophenone-based, and thioxanthone-based photoinitiators and photoinitiators when ultraviolet rays are used for active energy rays.
[0015]
The production of the crosslinkable nonwoven fabric of the present invention includes the steps of obtaining pellets from the crosslinkable resin composition, spinning them, and processing them into nonwoven fabrics.
In order to obtain pellets from the crosslinkable resin composition, a general method for producing pellets can be employed as it is. In addition, a process of obtaining fibers by spinning from the crosslinkable resin composition itself or from the obtained pellets can also employ a normal fiber spinning process. Further, a flash spinning method, a spinning process and a fiber opening process, and It is also possible to employ a melt blow method in which the dispersion process is integrated into one process.
As a process for processing from fibers to nonwoven fabrics, any of the known wet method and dry method, airlaid pulp method, spunlace method, melt (melt) blow method, and spunbond method can be employed. Further, as the bonding entanglement step, calendering thermal bonding, thermal bond thermal bonding, bonding with an adhesive, needle punch entanglement, fluid entanglement, or the like can be employed.
[0016]
Examples of active energy rays used in the present invention include electromagnetic waves, electron beams, particle beams, and combinations thereof. Examples of electromagnetic waves include γ rays, ultraviolet rays, and X rays. These active energy rays can be irradiated using a known apparatus.
In this invention, although an active energy ray is irradiated to a pellet, a fiber, and a nonwoven fabric, the preferable irradiation amount is as follows.
When using gamma rays as electromagnetic waves, it is preferably 0.1 to 30 MRad.
In the case of an electron beam, an acceleration voltage of 100 to 5,000 KV and an irradiation dose of 0.1 to 30 MRad are appropriate.
[0017]
In the present invention, active energy rays can be irradiated to any of pellets, fibers, and nonwoven fabrics obtained from the crosslinkable resin composition.
[0018]
According to the method of obtaining a pellet from the crosslinkable resin composition according to the present invention, irradiating the pellet with active energy rays, and then spinning and nonwoven fabric processing, a fiber having a small fiber diameter can be obtained. The nonwoven fabric which is excellent in texture can be manufactured.
[0019]
In the method of irradiating the fiber obtained from the crosslinkable resin composition with active energy rays to obtain the crosslinked fiber and then processing into a nonwoven fabric, the use of the crosslinked fiber in the spunbond process improves the shape memory property and rigidity of the fiber. In addition, since the resin can be drawn at a high speed and with a high share, the resin crystallizes in a high orientation, and ultrafine fibers having excellent strength can be processed into a nonwoven fabric with high productivity. In particular, the productivity of each process of defibration, dispersion, collection, transfer, and adhesive connection is improved. When a heat-fusible crosslinked fiber is used in the bonding step, a crosslinked nonwoven fabric having excellent crossover point adhesion and excellent texture and water absorption can be obtained. In addition, you may use a crosslinked fiber for only a part of fiber processed into a nonwoven fabric.
[0020]
Furthermore, the fiber obtained from the crosslinkable resin composition is not irradiated with active energy rays, but after being processed into a non-woven fabric, the non-woven fabric is irradiated with the active energy rays in the shape memory property, rigidity, tear strength, delamination resistance. Further, a crosslinked nonwoven fabric having excellent solvent resistance and texture, and improved functions such as water absorption, filter functionality, washability and antibacterial properties can be produced. In particular, the nonwoven fabric obtained by the meltblowing process has an extremely small fiber diameter and excellent functions such as texture and water absorption, but has a drawback of low tear strength. However, this defect is improved by irradiating the obtained nonwoven fabric with active energy rays, and a crosslinked nonwoven fabric excellent in tear strength is obtained.
[0021]
The cross-linked nonwoven fabric of the present invention is improved in shape memory property, rigidity, tear strength, delamination resistance, solvent resistance, texture and the like by cross-linking. In addition, a crosslinkable nonwoven fabric having excellent bulkiness and texture as well as improved functions such as water absorption and filter function can be obtained for reasons such as changes in molding process conditions and improved shape retention during melting. For this reason, it can be widely used for sanitary materials such as paper diapers and napkins, industrial materials such as filters, living materials such as carpets, and other medical materials.
[0022]
【Example】
EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto. “%” Indicates “% by weight” unless otherwise specified.
[0023]
(Example)
Crosslinkable monomer (B) with respect to 100 parts by weight of a 7/3 mixture of polybutylene succinate (“Bionore 1001” manufactured by Showa Polymer Co., Ltd.) and polycaprolactone (“PCLH7” manufactured by Daicel Chemical Industries, Ltd.) As a blend, 5 parts by weight of tris (acryloxyethyl) isocyanurate (“Fancryl FA-731A” manufactured by Hitachi Chemical Co., Ltd.) was blended and melt-spun. Subsequently, this melt-spun fiber was irradiated with γ rays having an acceleration voltage of 5000 KV and an irradiation dose of 2 MRad to obtain a crosslinked fiber.
On the other hand, a fiber is obtained by spinning polyethylene terephthalate resin, and this fiber and the above-mentioned heat fusion crosslinked fiber are pulled and subdivided and cooled at a speed of 5,000 m / min using an air jet. The fibers were spread and dispersed using, collected and transferred using air, and bonded by a continuous hot air treatment method (Thru-air method) to obtain a nonwoven fabric.
The nonwoven fabric maintained its fiber shape even after melting, and only the intersections of the fibers were bonded to each other, and the cross-over point adhesiveness was excellent. For this reason, a nonwoven fabric having excellent bulkiness and texture was obtained.
[0024]
(Comparative example)
A nonwoven fabric was obtained in the same manner as in the Examples except that the crosslinkable monomer (B) was not used. However, the fiber shape of the heat-fusible fiber could not be maintained during Thru-air adhesion, and the nonwoven fabric was fused in a plate shape.
[0025]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the crosslinked nonwoven fabric useful for a living material, a medical material, etc. with which shape memory property, rigidity, tear strength, delamination resistance, solvent resistance, a feeling, etc. were improved is provided.
Claims (6)
（ｉ）加工して不織布とし、次いで活性エネルギー線を照射してなる、又は、
（ii）活性エネルギー線を照射して架橋繊維とし、この架橋繊維を加工してなる
架橋不織布。100 parts by weight of a mixture of polybutylene succinate and polycaprolactone as a heat-fusible non-woven fiber raw material resin (A) A fiber containing fibers obtained by spinning a heat-fusible crosslinkable resin composition comprising 0.1 to 30 parts by weight of tris (acryloxyethyl) isocyanurate,
(I) processed into a non-woven fabric and then irradiated with active energy rays, or
(Ii) A crosslinked nonwoven fabric obtained by irradiating active energy rays to form a crosslinked fiber and processing the crosslinked fiber.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6388397A JP3710588B2 (en) | 1997-03-03 | 1997-03-03 | Cross-linked nonwoven fabric |
| US08/932,840 US6022550A (en) | 1996-09-18 | 1997-09-18 | Crosslinkable polymer composition, molded article therefrom, process for the preparation thereof, crosslinked nonwoven cloth, and process for the preparation thereof |
| EP97402162A EP0831119A2 (en) | 1996-09-18 | 1997-09-18 | Corsslinkable polymer composition, molded article therefrom, process for the preparation thereof, crosslinked nonwoven cloth, and process for the preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6388397A JP3710588B2 (en) | 1997-03-03 | 1997-03-03 | Cross-linked nonwoven fabric |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10245758A JPH10245758A (en) | 1998-09-14 |
| JP3710588B2 true JP3710588B2 (en) | 2005-10-26 |
Family
ID=13242140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6388397A Expired - Fee Related JP3710588B2 (en) | 1996-09-18 | 1997-03-03 | Cross-linked nonwoven fabric |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3710588B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4923172B2 (en) * | 2007-03-30 | 2012-04-25 | 国立大学法人福井大学 | Method for modifying polylactic acid fiber structural material |
| ATE505583T1 (en) * | 2009-03-18 | 2011-04-15 | Baumhueter Extrusion Gmbh | POLYMER FIBER, USE THEREOF AND METHOD FOR THE PRODUCTION THEREOF |
| EP2703528A1 (en) | 2012-08-31 | 2014-03-05 | baumhueter extrusion GmbH | Cross-linked polyethylene fibre, its use and process for its manufacture |
| CN114182433A (en) * | 2021-12-06 | 2022-03-15 | 江苏金太阳纺织科技股份有限公司 | Preparation method of modified cotton wadding |
-
1997
- 1997-03-03 JP JP6388397A patent/JP3710588B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10245758A (en) | 1998-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2545260B2 (en) | Bulky reinforced non-woven fabric | |
| US8105654B2 (en) | Thermoadhesive conjugate fibers and nonwoven fabric employing them | |
| EP1350869B1 (en) | Improved binder fiber and nonwoven web | |
| TWI283184B (en) | Nonwoven web with improved adhesion and reduced dust formation | |
| IT8149114A1 (en) | DIAPER CLOTH, SOFT, THICK AND LIGHT AND METHOD FOR ITS MANUFACTURE | |
| JP6755067B1 (en) | Biodegradable non-woven mask | |
| JP2001200429A (en) | Fiber having elastic core and elastic nonwoven fabric | |
| US20030003830A1 (en) | Air-laid web with high modulus fibers | |
| US10767296B2 (en) | Multi-denier hydraulically treated nonwoven fabrics and method of making the same | |
| JP2022508205A (en) | Bulky non-woven fabric with improved compressibility and resilience | |
| JP2008266812A (en) | Functionally modified recycled polyethylene terephthalate fiber and method for producing the same | |
| JPH02169718A (en) | Polyolefin heat-fusible fibers and nonwoven fabrics thereof | |
| JP3710588B2 (en) | Cross-linked nonwoven fabric | |
| KR920010333B1 (en) | Elasticized non-woven fabric and method of making the same | |
| US20080119806A1 (en) | Extensible Fibers-Method for Their Production and Use | |
| KR101915810B1 (en) | Non-woven Fabric Of Cross-section For High-efficiency Filter | |
| DE19908486A1 (en) | Process for laminating textile fabrics on expanding particle foam or foamed molded parts | |
| JP2005015990A (en) | Thermal adhesive composite fiber and non-woven fabric using the same | |
| JP2918988B2 (en) | Modified polyolefin ultrafine fiber generating composite fiber and woven or non-woven fabric | |
| JPH10140422A (en) | Conjugate fiber and nonwoven fabric | |
| CN111748911B (en) | Nonwoven fabric, method for producing the same, fastening tape, wound covering material, and absorbent article | |
| CN109594197A (en) | The preparation method of flame retardant type wall paper non-woven fabrics | |
| JPH04174719A (en) | Conjugate yarn | |
| JPS63267538A (en) | Nonwoven fabric laminate for electret | |
| JP2003049360A (en) | Thermal adhesive composite fiber and fiber product using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20050204 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20050510 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050704 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20050809 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050810 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| LAPS | Cancellation because of no payment of annual fees |