JP2010180492A - Wet nonwoven fabric and method for producing the same - Google Patents
Wet nonwoven fabric and method for producing the same Download PDFInfo
- Publication number
- JP2010180492A JP2010180492A JP2009023912A JP2009023912A JP2010180492A JP 2010180492 A JP2010180492 A JP 2010180492A JP 2009023912 A JP2009023912 A JP 2009023912A JP 2009023912 A JP2009023912 A JP 2009023912A JP 2010180492 A JP2010180492 A JP 2010180492A
- Authority
- JP
- Japan
- Prior art keywords
- polylactic acid
- fiber
- nonwoven fabric
- wet nonwoven
- paper
- 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 61
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 124
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 104
- 239000004626 polylactic acid Substances 0.000 claims abstract description 104
- 239000011230 binding agent Substances 0.000 claims abstract description 41
- 239000000123 paper Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 11
- 229920006240 drawn fiber Polymers 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000003490 calendering Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 239000011111 cardboard Substances 0.000 claims description 2
- JVTAAEKCZFNVCJ-REOHCLBHSA-N L-lactic acid Chemical compound C[C@H](O)C(O)=O JVTAAEKCZFNVCJ-REOHCLBHSA-N 0.000 description 8
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 8
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 8
- -1 polypropylene Polymers 0.000 description 8
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 239000004310 lactic acid Substances 0.000 description 4
- 235000014655 lactic acid Nutrition 0.000 description 4
- 239000011087 paperboard Substances 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 229930182843 D-Lactic acid Natural products 0.000 description 3
- JVTAAEKCZFNVCJ-UWTATZPHSA-N D-lactic acid Chemical compound C[C@@H](O)C(O)=O JVTAAEKCZFNVCJ-UWTATZPHSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000002202 Polyethylene glycol Substances 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 229920001131 Pulp (paper) Polymers 0.000 description 3
- 229940022769 d- lactic acid Drugs 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 229920001223 polyethylene glycol Polymers 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- WHBMMWSBFZVSSR-UHFFFAOYSA-N 3-hydroxybutyric acid Chemical compound CC(O)CC(O)=O WHBMMWSBFZVSSR-UHFFFAOYSA-N 0.000 description 2
- FMHKPLXYWVCLME-UHFFFAOYSA-N 4-hydroxy-valeric acid Chemical compound CC(O)CCC(O)=O FMHKPLXYWVCLME-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- JJTUDXZGHPGLLC-UHFFFAOYSA-N lactide Chemical compound CC1OC(=O)C(C)OC1=O JJTUDXZGHPGLLC-UHFFFAOYSA-N 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- IWHLYPDWHHPVAA-UHFFFAOYSA-N 6-hydroxyhexanoic acid Chemical compound OCCCCCC(O)=O IWHLYPDWHHPVAA-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 229920003232 aliphatic polyester Polymers 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000002781 deodorant agent Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000006224 matting agent Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920002961 polybutylene succinate Polymers 0.000 description 1
- 239000004631 polybutylene succinate Substances 0.000 description 1
- 229920001610 polycaprolactone Polymers 0.000 description 1
- 239000004632 polycaprolactone Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002215 polytrimethylene terephthalate Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- IBBQVGDGTMTZRA-UHFFFAOYSA-N sodium;2-sulfobenzene-1,3-dicarboxylic acid Chemical compound [Na].OC(=O)C1=CC=CC(C(O)=O)=C1S(O)(=O)=O IBBQVGDGTMTZRA-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Nonwoven Fabrics (AREA)
- Paper (AREA)
Abstract
Description
本発明は、ポリ乳酸繊維を用いてなり引張強度に優れた湿式不織布、およびその製造方法に関する。 The present invention relates to a wet nonwoven fabric using polylactic acid fibers and excellent in tensile strength, and a method for producing the same.
従来、物資の輸送に用いられる紙や用紙などの分野で、合成繊維（ポリエステル、アクリル、ポリプロピレン、ポリエチレン、またはそれらの複合繊維）からなるカットファイバーや木材パルプを用いた湿式不織布が提案されている。
他方、近年では石油枯渇や木材枯渇問題を解消するため、ポリ乳酸繊維を用いた湿式不織布が提案されている（例えば、特許文献１、特許文献２参照）。
しかしながら、かかる湿式不織布はその引張強度が小さく実使用上問題があった。
Conventionally, wet non-woven fabrics using cut fibers and wood pulp made of synthetic fibers (polyester, acrylic, polypropylene, polyethylene, or composite fibers thereof) have been proposed in the fields of paper and paper used for transportation of goods. .
On the other hand, in recent years, wet nonwoven fabrics using polylactic acid fibers have been proposed to solve the problems of oil depletion and wood depletion (see, for example, Patent Document 1 and Patent Document 2).
However, such wet nonwoven fabric has a problem in practical use because its tensile strength is small.
本発明は上記の背景に鑑みなされたものであり、その目的は、ポリ乳酸繊維を用いてなり引張強度に優れた湿式不織布、およびその製造方法を提供することにある。 This invention is made | formed in view of said background, The objective is to provide the wet nonwoven fabric which uses polylactic acid fiber and was excellent in tensile strength, and its manufacturing method.
本発明者は上記の課題を達成するため鋭意検討した結果、ポリ乳酸主体繊維とポリ乳酸バインダー繊維とを用いて湿式不織布を得る際にポリ乳酸主体繊維とポリ乳酸バインダー繊維の単糸繊度をともに特定の範囲内とすることにより、地合いを損わず優れた引張強度を有する湿式不織布が得られることを見出し、さらに鋭意検討を重ねることにより本発明を完成するに至った。 As a result of intensive studies to achieve the above-mentioned problems, the present inventor found that when obtaining a wet nonwoven fabric using a polylactic acid-based fiber and a polylactic acid binder fiber, both the single yarn fineness of the polylactic acid-based fiber and the polylactic acid binder fiber By making it within a specific range, it was found that a wet nonwoven fabric having excellent tensile strength without damaging the texture was obtained, and the present invention was completed by further intensive studies.
かくして、本発明によれば「ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂとで構成され、目付が１０〜１００ｇ／ｍ２の湿式不織布であって、前記ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂの単糸繊度がともに０．６〜２．２ｄｔｅｘであり、かつ前記ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂとの重量比Ａ／Ｂが１５／８５〜８５／１５の範囲内であり、かつ湿式不織布の引張強度が、ＪＩＳ Ｐ８１１３に規定される裂断長で０．８ｋｍ以上であることを特徴とする湿式不織布。」が提供される。 Thus, according to the present invention, “a wet non-woven fabric composed of a polylactic acid main fiber A and a polylactic acid binder fiber B and having a basis weight of 10 to 100 g / m 2 , the polylactic acid main fiber A and the polylactic acid binder fiber” The single yarn fineness of B is 0.6 to 2.2 dtex, and the weight ratio A / B between the polylactic acid main fiber A and the polylactic acid binder fiber B is in the range of 15/85 to 85/15. The wet strength nonwoven fabric is characterized in that the tensile strength of the wet nonwoven fabric is 0.8 km or more in terms of the breaking length specified in JIS P8113.
その際、前記ポリ乳酸主体繊維Ａが延伸繊維であることが好ましい。また、前記ポリ乳酸バインダー繊維Ｂが未延伸繊維であることが好ましい。また、前記ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂの繊維長がともに３〜２０ｍｍの範囲内であることが好ましい。また、前記ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂとがともにノークリンプであることが好ましい。 In that case, it is preferable that the said polylactic acid main fiber A is a drawn fiber. The polylactic acid binder fiber B is preferably an unstretched fiber. Moreover, it is preferable that both the fiber lengths of the said polylactic acid main fiber A and the polylactic acid binder fiber B are in the range of 3-20 mm. Moreover, it is preferable that both the said polylactic acid main fiber A and the polylactic acid binder fiber B are no crimps.
本発明の湿式不織布において、湿式不織布がポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂのみで構成されることが好ましい。また、湿式不織布が、梱包用紙、ダンボール紙、印刷用紙、テイッシュペーパー、トイレットペーパー、ワイピングペーパー、ろ紙または農業用として用いる湿式不織布であることが好ましい。 In the wet nonwoven fabric of the present invention, it is preferable that the wet nonwoven fabric is composed only of the polylactic acid main fiber A and the polylactic acid binder fiber B. Moreover, it is preferable that a wet nonwoven fabric is a wet nonwoven fabric used for packing paper, corrugated paper, printing paper, tissue paper, toilet paper, wiping paper, filter paper, or agriculture.
また、本発明によれば、単糸繊度がともに０．６〜２．２ｄｔｅｘである、ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂとを用いて湿式抄紙した後、ドラム型熱処理機またはエアースルードライヤーで熱処理を施し、さらにカレンダーローラーにて熱処理を施す、前記の湿式不織布の製造方法が提供される。 In addition, according to the present invention, after wet paper making using the polylactic acid main fiber A and the polylactic acid binder fiber B, both of which the single yarn fineness is 0.6 to 2.2 dtex, the drum type heat treatment machine or the air-through A method for producing the wet nonwoven fabric is provided, wherein the wet nonwoven fabric is subjected to heat treatment with a drier and further subjected to heat treatment with a calender roller.
本発明によれば、ポリ乳酸繊維を用いてなり引張強度および地合いに優れた湿式不織布、およびその製造方法が得られる。 ADVANTAGE OF THE INVENTION According to this invention, the wet nonwoven fabric which uses polylactic acid fiber and was excellent in tensile strength and texture, and its manufacturing method are obtained.
以下、本発明の実施の形態について詳細に説明する。
本発明の湿式不織布は、ポリ乳酸主体繊維Ａ（単に「主体繊維」と称することもある。）とポリ乳酸バインダー繊維Ｂ（単に「バインダー繊維」と称することもある。）とで構成され、かつ目付が１０〜１００ｇ／ｍ２（好ましくは２０〜９０ｇ／ｍ２）の湿式不織布である。該目付が１０ｇ／ｍ２よりも小さいと湿式不織布の製造が困難となるおそれがある。逆に、該目付が１００ｇ／ｍ２よりも大きいと、乾燥の際の熱量が大きくなるため、比較的湿熱に弱いポリ乳酸繊維が湿式不織布に含まれる場合、湿式不織布の品質が低下するおそれがある。
Hereinafter, embodiments of the present invention will be described in detail.
The wet nonwoven fabric of the present invention is composed of polylactic acid-based fibers A (sometimes simply referred to as “main fibers”) and polylactic acid binder fibers B (sometimes simply referred to as “binder fibers”), and It is a wet nonwoven fabric having a basis weight of 10 to 100 g / m 2 (preferably 20 to 90 g / m 2 ). If the basis weight is less than 10 g / m 2, it may be difficult to produce a wet nonwoven fabric. Conversely, if the basis weight is greater than 100 g / m 2, the amount of heat at the time of drying increases, and therefore, when the wet nonwoven fabric contains polylactic acid fibers that are relatively resistant to wet heat, the quality of the wet nonwoven fabric may be degraded. is there.
ここで、ポリ乳酸主体繊維Ａおよびポリ乳酸バインダー繊維Ｂを構成するポリ乳酸としては、Ｌ乳酸を主成分とするもの（好ましくはＬ乳酸由来の繰返し単位が９０〜１００モル％）、Ｄ乳酸を主成分とするもの（好ましくはＤ乳酸由来の繰返し単位が９０〜１００モル％）、国際公開第２００８／０２９９３４号パンフレットに記載されているように、Ｌ乳酸とＤ乳酸とを用いてステレオコンプレックス結晶を形成してなるポリ乳酸などが例示される。また、他の成分を共重合した共重合ポリ乳酸であってもよい。その際、共重合可能な成分としては、グリコール酸、３−ヒドロキシ酪酸、４−ヒドロキシ吉草酸、６−ヒドロキシカプロン酸などのヒドロキシカルボン酸類の他、エチレングリコール、プロピレングリコール、ブタンジオール、ネオペンチルグリコール、ポリエチレングリコール、グリセリン、ペンタエリスリトール等の分子内に複数の水酸基を含有する化合物またはそれらの誘導体、アジピン酸、セバシン酸、フマル酸、テレフタル酸、イソフタル酸、２，６−ナフタレンカルボン酸、５−ナトリウムスルホイソフタル酸、５−テトラブチルホスホニウムイソフタル酸等の分子内に複数のカルボン酸基を含有する化合物類またはそれらの誘導体が例示される。なかでも、Ｌ乳酸を主成分とするポリ乳酸が生産性や市場価格の点で特に好ましい。 Here, the polylactic acid constituting the polylactic acid main fiber A and the polylactic acid binder fiber B is mainly composed of L lactic acid (preferably 90 to 100 mol% of repeating units derived from L lactic acid), and D lactic acid. Stereocomplex crystals using L lactic acid and D lactic acid as the main component (preferably 90-100 mol% of D-lactic acid-derived repeating units), as described in WO2008 / 029934 The polylactic acid etc. which form are formed. Moreover, the copolymer polylactic acid which copolymerized the other component may be sufficient. In this case, copolymerizable components include glycolic acid, 3-hydroxybutyric acid, 4-hydroxyvaleric acid, hydroxycarboxylic acids such as 6-hydroxycaproic acid, ethylene glycol, propylene glycol, butanediol, neopentyl glycol. , Polyethylene glycol, glycerin, pentaerythritol and other compounds containing a plurality of hydroxyl groups in the molecule or derivatives thereof, adipic acid, sebacic acid, fumaric acid, terephthalic acid, isophthalic acid, 2,6-naphthalenecarboxylic acid, 5- Examples thereof include compounds containing a plurality of carboxylic acid groups in the molecule such as sodium sulfoisophthalic acid and 5-tetrabutylphosphonium isophthalic acid, or derivatives thereof. Among these, polylactic acid mainly composed of L lactic acid is particularly preferable in terms of productivity and market price.
なお、前記ポリ乳酸において、溶融粘度を低減させるため、ポリカプロラクトン、ポリブチレンサクシネート、およびポリエチレンサクシネートのような脂肪族ポリエステルポリマーを内部可塑剤として、あるいは外部可塑剤として用いることができる。さらには、艶消し剤、消臭剤、難燃剤、糸摩擦低減剤、抗酸化剤、着色顔料等として無機微粒子や有機化合物を必要に応じて添加することができる。 In the polylactic acid, aliphatic polyester polymers such as polycaprolactone, polybutylene succinate, and polyethylene succinate can be used as an internal plasticizer or an external plasticizer in order to reduce the melt viscosity. Furthermore, inorganic fine particles and organic compounds can be added as necessary as matting agents, deodorants, flame retardants, yarn friction reducing agents, antioxidants, coloring pigments and the like.
本発明の湿式不織布において、ポリ乳酸主体繊維Ａは前記のポリ乳酸を用いて常法により紡糸し延伸した延伸繊維が好ましい。一方、ポリ乳酸バインダー繊維Ｂは前記のポリ乳酸を用いて常法により紡糸し、かつ未延伸のものが好ましい。また、前記ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂは、前記ポリ乳酸単独成分からなる繊維が最も好ましいが、前記ポリ乳酸を１成分とする複合繊維（例えば、芯鞘型複合繊維やサイドバイサイド型複合繊維など）であってもよい。 In the wet nonwoven fabric of the present invention, the polylactic acid-based fiber A is preferably a drawn fiber that is spun and stretched by the conventional method using the polylactic acid. On the other hand, the polylactic acid binder fiber B is preferably spun by the usual method using the above-mentioned polylactic acid and unstretched. The polylactic acid-based fiber A and the polylactic acid binder fiber B are most preferably fibers composed of the single component of polylactic acid, but composite fibers containing the polylactic acid as one component (for example, core-sheath type composite fibers or side-by-side types). Composite fiber etc.).
ここで、前記ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂの単糸繊度がともに０．６〜２．２ｄｔｅｘ（好ましくは０．９〜１．９ｄｔｅｘ、特に好ましくは１．２〜１．８ｄｔｅｘ）であることが肝要である。該単糸繊度が０．６ｄｔｅｘよりも小さいと不織布としての剛性が小さくなるだけでなく引張強度も低下するおそれがあり好ましくない。逆に、該単糸繊度が２．２ｄｔｅｘよりも大きいと、地合いが悪化するおそれがあり好ましくない。 Here, the single yarn fineness of the polylactic acid main fiber A and the polylactic acid binder fiber B is both 0.6 to 2.2 dtex (preferably 0.9 to 1.9 dtex, particularly preferably 1.2 to 1.8 dtex). It is important to be. When the single yarn fineness is less than 0.6 dtex, not only the rigidity as the nonwoven fabric is reduced but also the tensile strength may be lowered, which is not preferable. Conversely, if the single yarn fineness is larger than 2.2 dtex, the texture may be deteriorated, which is not preferable.
前記ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂにおいて、単糸繊維の断面形状は丸断面が特に好ましいが、異型断面形状（例えば、中空、三角、扁平、くびれ付扁平など）であってもよい。 In the polylactic acid main fiber A and the polylactic acid binder fiber B, the cross-sectional shape of the single yarn fiber is particularly preferably a round cross-section, but may be an irregular cross-sectional shape (for example, hollow, triangular, flat, constricted flat, etc.). .
前記ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂにおいて、繊維長がともに３〜２０ｍｍの範囲内であることが好ましい。該繊維長が３ｍｍよりも小さいとアスペクト比が小さくなるため、抄紙工程時に繊維が脱落しやすくなったり、均一な繊維長でカットするには生産性を落とす必要がある。逆に、該繊維長が２０ｍｍよりも大きい場合、抄紙工程において繊維を分散させ難くなるおそれがある。 In the polylactic acid main fiber A and the polylactic acid binder fiber B, both fiber lengths are preferably in the range of 3 to 20 mm. When the fiber length is less than 3 mm, the aspect ratio becomes small. Therefore, it is necessary to decrease productivity in order to make the fiber easily fall off during the paper making process or to cut with a uniform fiber length. Conversely, if the fiber length is greater than 20 mm, it may be difficult to disperse the fibers in the paper making process.
前記ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂにおいて、特開２００１−２６８６９１号公報に記載されているような捲縮が付与されていてもよいが、水分散性を高め、地合いをよくする上でノークリンプ（捲縮なし）であることが好ましい。 In the polylactic acid main fiber A and the polylactic acid binder fiber B, crimps as described in JP-A No. 2001-268691 may be imparted, but the water dispersibility is improved and the texture is improved. And preferably no crimp (no crimp).
また、前記ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂとの重量比Ａ／Ｂが１５／８５〜８５／１５（好ましくは３０／７０〜７０／３０）の範囲内であることが肝要である。ポリ乳酸バインダー繊維Ｂの重量比が該範囲よりも小さいと、不織布の形態安定性が損われ、毛羽立ち等が発生しやすくなり好ましくない。逆に、ポリ乳酸バインダー繊維Ｂの重量比が該範囲よりも大きいと、できあがった湿式不織布の目がつまりすぎてフィルムライクとなり、不織布としての引張強度や引裂き強度が低下し好ましくない。 Further, it is important that the weight ratio A / B of the polylactic acid-based fiber A and the polylactic acid binder fiber B is in the range of 15/85 to 85/15 (preferably 30/70 to 70/30). . When the weight ratio of the polylactic acid binder fiber B is smaller than the above range, the shape stability of the nonwoven fabric is impaired, and fuzzing is likely to occur, which is not preferable. On the contrary, if the weight ratio of the polylactic acid binder fiber B is larger than the above range, the resulting wet nonwoven fabric is too clogged and becomes film-like, which is not preferable because the tensile strength and tear strength of the nonwoven fabric are lowered.
本発明の湿式不織布は、前記ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂのみで構成されることが最も好ましいが、不織布重量に対して１０重量％以下（より好ましくは５重量％以下）であれば、芳香族ポリエステル繊維（例えば、ポリエチレンテレフタレート繊維やポリトリメチレンテレフタレート繊維）や木材パルプなどが含まれていてもよい。 The wet nonwoven fabric of the present invention is most preferably composed only of the polylactic acid main fiber A and the polylactic acid binder fiber B, but it may be 10% by weight or less (more preferably 5% by weight or less) based on the weight of the nonwoven fabric. For example, aromatic polyester fibers (for example, polyethylene terephthalate fibers or polytrimethylene terephthalate fibers), wood pulp, and the like may be included.
本発明の湿式不織布は前記の構成を有し、かつ湿式不織布の引張強度が、ＪＩＳ Ｐ８１１３に規定される裂断長で０．８ｋｍ以上（好ましくは１．０〜３．０ｋｍ）と優れた引張強度を有するものである。 The wet nonwoven fabric of the present invention has the above-described configuration, and the tensile strength of the wet nonwoven fabric is excellent at a breaking length of 0.8 km or more (preferably 1.0 to 3.0 km) as defined in JIS P8113. It has strength.
本発明の湿式不織布は、例えば以下の製造方法により製造することができるが、かかる製造方法に限定されるものではない。
飼料用トウモロコシなどの植物より得られたデンプンを、酵素により加水分解させグルコースを得る。次いで得られたグルコースを乳酸菌により発酵させ乳酸を得る。
The wet nonwoven fabric of the present invention can be produced, for example, by the following production method, but is not limited to such production method.
Glucose is obtained by hydrolyzing starch obtained from plants such as feed corn with an enzyme. Next, the obtained glucose is fermented with lactic acid bacteria to obtain lactic acid.
ポリ乳酸の製造方法には、乳酸を原料として一旦環状二量体であるラクチドを生成せしめ、その後開環重合を行う二段階のラクチド法と、乳酸を原料として溶媒中で直接脱水縮合を行う一段階の直接重合法が知られているが、いずれの製法を採用しても良い。もちろん、市販のポリ乳酸チップ（例えば、ネイチャーワークス社製ポリ乳酸チップ）を用いても何らさしつかえない。 The polylactic acid production method includes a two-stage lactide method in which lactide, which is a cyclic dimer, is first produced from lactic acid as a raw material, and then ring-opening polymerization, and direct dehydration condensation in a solvent using lactic acid as a raw material. Although a direct polymerization method in stages is known, any production method may be adopted. Of course, there is no problem even if a commercially available polylactic acid chip (for example, a polylactic acid chip manufactured by Nature Works) is used.
次いで、前記ポリ乳酸チップを２２０〜２４０℃の温度で溶融し、これを所定の孔径（最終的に得られる繊維の単糸繊度が０．６〜２．２ｄｔｅｘとなるような孔径）を有する口金から押し出し、８００〜３０００ｍ／ｍｉｎの速度で引き取ることにより、ポリ乳酸の未延伸糸（ポリ乳酸バインダー繊維）を製造する。また、ポリ乳酸の未延伸糸を通常の延伸法により７５〜１２０℃の温度下で１．３〜１．５倍の延伸倍率で延伸し、ポリ乳酸の延伸糸（ポリ乳酸主体繊維Ａ）を得る。次いで、必要に応じてクリンパーにより捲縮をかけた後、必要に応じてポリ乳酸延伸糸と未延伸糸をカッターによりカットし、ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂを得る。 Next, the polylactic acid chip is melted at a temperature of 220 to 240 ° C., and this has a predetermined hole diameter (a hole diameter such that the final single fiber fineness is 0.6 to 2.2 dtex). The undrawn yarn (polylactic acid binder fiber) of polylactic acid is produced by extruding from the above and drawing at a speed of 800 to 3000 m / min. Further, an unstretched yarn of polylactic acid is stretched at a stretch ratio of 1.3 to 1.5 times at a temperature of 75 to 120 ° C. by a normal stretching method, and a stretched yarn of polylactic acid (polylactic acid main fiber A) is obtained. obtain. Next, after crimping with a crimper as necessary, the polylactic acid drawn yarn and undrawn yarn are cut with a cutter as necessary to obtain a polylactic acid main fiber A and a polylactic acid binder fiber B.
次いで、前記ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂとを重量比Ａ／Ｂが１５／８５〜８５／１５の範囲内となるように用いて湿式抄紙した後、乾燥する。その際、湿式抄紙法としては、抄上げるワイヤーパートの形状等により、短網、長網、円網及びそれらのコンビネーション（多層抄き）があるが、いずれの方式でも問題ない。また、乾燥処理工程としては、円筒状ドラム型に接触させるヤンキードライヤーや、ドラムが多数並んだ多筒ドラム、熱風による熱風サクション（エアースルードライヤー）等を用いる事が出来る。その際、乾燥処理温度としては８０〜１５０℃の範囲が好ましい。 Next, the polylactic acid main fiber A and the polylactic acid binder fiber B are wet-made using the weight ratio A / B in the range of 15/85 to 85/15, and then dried. At this time, as the wet papermaking method, there are a short net, a long net, a circular net and a combination thereof (multilayer papermaking) depending on the shape of the wire part to be made, but any method is not problematic. Moreover, as a drying process, a Yankee dryer brought into contact with a cylindrical drum mold, a multi-cylinder drum in which a large number of drums are arranged, a hot air suction (air through dryer) using hot air, and the like can be used. At that time, the drying treatment temperature is preferably in the range of 80 to 150 ° C.
また、乾燥処理工程の後に、最終的に熱圧カレンダー（２本の熱ロールの間に不織布を通す）処理を行うことが重要である。かかる熱圧カレンダー処理を施すことにより繊維同士の熱接着が強固になり、優れた引張強度を有する湿式不織布が得られる。ここで、カレンダー加工機としては、公知の素材（金属、ペーパー、樹脂等）、公知の柄（フラット、エンボス等）を用いて加工する事が可能である。その際、カレンダーロールの表面温度としては、１００〜１５０℃、線圧としては１００〜３００ｋｇｆ／ｃｍ（９８０〜２９４０Ｎ／ｃｍ）の範囲が好ましい。 In addition, it is important to finally perform a hot-pressure calender (passing the nonwoven fabric between two hot rolls) after the drying process. By applying such a hot-pressure calendering treatment, the thermal bonding between the fibers becomes strong, and a wet nonwoven fabric having excellent tensile strength can be obtained. Here, as a calendar processing machine, it is possible to process using a known material (metal, paper, resin, etc.) and a known pattern (flat, embossed, etc.). At that time, the surface temperature of the calender roll is preferably 100 to 150 ° C. and the linear pressure is preferably in the range of 100 to 300 kgf / cm (980 to 2940 N / cm).
かくして得られた湿式不織布は引張強度だけでなく地合いにも優れるので、梱包用紙、ダンボール紙、印刷用紙、テイッシュペーパー、トイレットペーパー、ワイピングペーパー、ろ紙または農業用として好適に用いられる。 Since the wet nonwoven fabric thus obtained is excellent not only in tensile strength but also in texture, it is suitably used for packing paper, cardboard paper, printing paper, tissue paper, toilet paper, wiping paper, filter paper, or agriculture.
次に本発明の実施例及び比較例を詳述するが、本発明はこれらによって限定されるものではない。なお、実施例中の各測定項目は下記の方法で測定した。
（１）引張り強度（裂断長）
ＪＩＳ Ｐ８１１３（紙及び板紙の引張強さ試験方法）に基づいて実施した。
（２）伸度
ＪＩＳ Ｐ８１３２（紙及び板紙の伸び試験方法）に基づいて実施した。
（３）目付
ＪＩＳ Ｐ８１２４（紙のメートル坪量測定方法）に基づいて実施した。
（４）厚み
ＪＩＳ Ｐ８１１８（紙及び板紙の厚さと密度の試験方法）に基づいて実施した。
（５）密度
ＪＩＳ Ｐ８１１８（紙及び板紙の厚さと密度の試験方法）に基づいて実施した。
（６）通気度
ＪＩＳ Ｌ１９１３（一般短繊維不織布試験方法）に基づいて測定した。
（７）資源適応性
○ 使用繊維の中に占める木材資源、石油資源を使用しない場合
× 使用繊維の中に占める木材資源、石油資源の比率が０％を超え２０％未満の場合
×× 使用繊維の中に占める木材資源、石油資源の比率が２０％を超える場合
（８）地合い
出来上がったサンプルの表面の状態を目視にて４段階判定を実施した（地合いが良いものから順に、４級、３級、２級、１級）
Next, although the Example and comparative example of this invention are explained in full detail, this invention is not limited by these. In addition, each measurement item in an Example was measured with the following method.
(1) Tensile strength (breaking length)
The test was carried out based on JIS P8113 (Test method for tensile strength of paper and paperboard).
(2) Elongation It implemented based on JISP8132 (elongation test method of paper and paperboard).
(3) Basis weight It implemented based on JIS P8124 (Measuring basis weight of paper).
(4) Thickness The thickness was measured based on JIS P8118 (Test method for thickness and density of paper and paperboard).
(5) Density Conducted based on JIS P8118 (Testing method for thickness and density of paper and paperboard).
(6) Air permeability Measured based on JIS L1913 (general short fiber nonwoven fabric test method).
(7) Resource adaptability ○ When not using wood resources and petroleum resources in the used fiber × When the ratio of wood resources and petroleum resources in the used fiber is more than 0% and less than 20% × × Used fiber When the ratio of timber resources and petroleum resources in the soil exceeds 20% (8) Texture The condition of the surface of the finished sample was visually evaluated in four stages (in order from the texture that is good, grade 4, 3 Grade, 2nd grade, 1st grade)
［実施例１］
（ポリ乳酸主体繊維Ａ）
ネイチャーワークス社製ポリ乳酸チップを乾燥後、２２５℃で溶融し、孔数が１００８の紡糸口金を通して、５１０ｇ／分で吐出し、１３００ｍ／分の速度で引取った。この繊維を収束し、約１４万ｄｔｅｘのトウにした後、温水中で２．４倍に延伸し、酸成分がモル比でテレフタル酸が８０％、イソフタル酸が２０％と数平均分子量３０００のポリエチレングリコール７０重量％とを共重合した数平均分子量が約１００００のポリエーテル・ポリエステル共重合体のエマルジョン（濃度２％）を通過させ、約１２％の水分率になるように絞った後、乾燥せずに５ｍｍの繊維長に切断し、単糸繊度が１．６ｄｔｅｘのポリ乳酸主体繊維Ａ（延伸繊維、ノークリンプ）を得た。
[Example 1]
(Polylactic acid-based fiber A)
A polylactic acid chip manufactured by Nature Works was dried, melted at 225 ° C., discharged through a spinneret having a hole number of 1008 at 510 g / min, and taken up at a rate of 1300 m / min. After converging this fiber to make a tow of about 140,000 dtex, the fiber is stretched 2.4 times in warm water, and the acid component has a molar ratio of terephthalic acid of 80%, isophthalic acid of 20%, number average molecular weight of 3000 After passing through an emulsion (concentration 2%) of a polyether / polyester copolymer having a number average molecular weight of about 10,000 copolymerized with 70% by weight of polyethylene glycol, the mixture is squeezed to a moisture content of about 12%, and then dried. Without cutting, a fiber length of 5 mm was cut to obtain a polylactic acid main fiber A (drawn fiber, no crimp) having a single yarn fineness of 1.6 dtex.
（ポリ乳酸バインダー繊維）
ネイチャーワークス社製ポリ乳酸チップを乾燥後、２２５℃で溶融し、孔数が３００６の紡糸口金を通して、４４０ｇ／分で吐出し、１０００ｍ／分の速度で引取った。この繊維を収束し、約１４万ｄｔｅｘのトウにした後、延伸せずに、酸成分がモル比でテレフタル酸が８０％、イソフタル酸が２０％と数平均分子量３０００のポリエチレングリコール７０重量％とを共重合した数平均分子量が約１００００のポリエーテル・ポリエステル共重合体のエマルジョン（濃度２％）を通過させ、約１２％の水分率になるように絞った後、乾燥せずに５ｍｍの繊維長に切断し、単糸繊度が１．５ｄｔｅｘのポリ乳酸バインダー繊維（未延伸繊維、ノークリンプ）を得た。
(Polylactic acid binder fiber)
A polylactic acid chip manufactured by Nature Works was dried, melted at 225 ° C., discharged through a spinneret having a number of holes of 3006 at 440 g / min, and taken up at a speed of 1000 m / min. After converging this fiber to make a tow of about 140,000 dtex, without stretching, the acid component was 80% by weight of terephthalic acid, 20% of isophthalic acid, and 70% by weight of polyethylene glycol having a number average molecular weight of 3000. After passing through an emulsion (concentration 2%) of a polyether / polyester copolymer having a number average molecular weight of about 10,000, the fiber is squeezed to a moisture content of about 12%, and then dried to a 5 mm fiber. Cut into long pieces, a polylactic acid binder fiber (undrawn fiber, no crimp) having a single yarn fineness of 1.5 dtex was obtained.
（湿式抄紙および乾燥処理およびカレンダー加工）
ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂを８０／２０の重量比で混合撹拌した後、手抄きマシン（熊谷理機工業製、型番：Ｎｏ．２５５５、標準角型シートマシン、以下同じ）を用いて、７５ｇ／ｍ２を抄紙した後、ドライヤー（熊谷理機工業製、型番：Ｎｏ．２５７５−II、回転式乾燥機（高温型））を用いて、１００℃×２分で乾燥処理を施した。その後、金属／金属からなるカレンダー加工（１２０℃×２００ｋｇ／ｃｍ（１９６０Ｎ／ｃｍ））を施し、湿式不織布を得た。その物性を表１に示す。また、地合いは優れており４級であった。
次いで、該湿式不織布を用いて印刷用紙を得たところ、引張強度および地合いに優れるものであった。
(Wet papermaking and drying and calendaring)
After mixing and stirring the polylactic acid main fiber A and the polylactic acid binder fiber B at a weight ratio of 80/20, a hand-making machine (manufactured by Kumagai Riki Kogyo, model number: No. 2555, standard square sheet machine, the same applies hereinafter) using, after papermaking 75 g / m 2, dryers: using (Kumagai Riki Kogyo Co., Ltd., model number No.2575-II, tumble dryer (hot type)), dried at 100 ° C. × 2 minutes Was given. Thereafter, calendar processing (120 ° C. × 200 kg / cm (1960 N / cm)) made of metal / metal was applied to obtain a wet nonwoven fabric. The physical properties are shown in Table 1. In addition, the texture was excellent and was grade 4.
Next, when a printing paper was obtained using the wet nonwoven fabric, it was excellent in tensile strength and texture.
［実施例２］
実施例１記載の中で繊維の比率を変更（ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂを２０／８０）した以外は同様の方法で不織布を得た。その物性を表１に示す。また、地合いは優れており４級であった。
[Example 2]
A nonwoven fabric was obtained in the same manner as in Example 1 except that the fiber ratio was changed (polylactic acid main fiber A and polylactic acid binder fiber B 20/80). The physical properties are shown in Table 1. In addition, the texture was excellent and was grade 4.
［比較例１］
実施例１において、ポリ乳酸主体繊維Ａ（１．６ｄｔ×５ｍｍ）に変えて、ポリエチレンテレフタレート延伸繊維（帝人ファイバー株式会社、登録商標：テピルス、銘柄：ＴＴ０４Ｎ ＳＤ１．７×５）に変更する以外は同様の方法で不織布を得た。その物性を表１に示す。また、地合いは優れており４級であった。
[Comparative Example 1]
In Example 1, except changing to the polylactic acid main fiber A (1.6 dt × 5 mm) and changing to a polyethylene terephthalate drawn fiber (Teijin Fibers Ltd., registered trademark: Tepyrus, brand: TT04N SD 1.7 × 5). A nonwoven fabric was obtained in the same manner. The physical properties are shown in Table 1. In addition, the texture was excellent and was grade 4.
［比較例２］
実施例１の中で、ポリ乳酸バインダー繊維Ｂ（１．４ｄｔ×５ｍｍ）に変えて、ポリエチレンテレフタレート未延伸型バインダー繊維（帝人ファイバー株式会社、登録商標：テピルス、銘柄：ＴＡ０７Ｎ ＳＤ１．２×５）に変更した以外は同様の方法で不織布を得た。その物性を表１に示す。また、地合いは優れており４級であった。
[Comparative Example 2]
In Example 1, instead of polylactic acid binder fiber B (1.4 dt × 5 mm), polyethylene terephthalate unstretched binder fiber (Teijin Fibers Ltd., registered trademark: Tepyrus, brand: TA07N SD1.2 × 5) A non-woven fabric was obtained in the same manner except that it was changed to. The physical properties are shown in Table 1. In addition, the texture was excellent and was grade 4.
［比較例３］
実施例１において、木材パルプＣを少量添加し、（Ａ／Ｂ／Ｃ＝７０／２０／１０））とすること以外は同様の方法で不織布を得た。その物性を表１に示す。また、地合いは優れており４級であった。
[Comparative Example 3]
A nonwoven fabric was obtained in the same manner as in Example 1 except that a small amount of wood pulp C was added to (A / B / C = 70/20/10)). The physical properties are shown in Table 1. In addition, the texture was excellent and was grade 4.
［比較例４］
実施例１において、ポリ乳酸主体繊維Ａの単糸繊度を０．４ｄｔｅｘに変更すること以外は実施例１と同様にした。得られた湿式不織布の引張強度は０．５ｋｍと引張強度に劣るものであった。
[Comparative Example 4]
In Example 1, it carried out similarly to Example 1 except having changed the single yarn fineness of the polylactic acid main fiber A into 0.4 dtex. The tensile strength of the obtained wet nonwoven fabric was 0.5 km, which was inferior to the tensile strength.
［比較例５］
実施例１において、ポリ乳酸主体繊維Ａの単糸繊度を２．５ｄｔｅｘに変更すること以外は実施例１と同様にした。得られた湿式不織布の地合いは２級と地合いに劣るものであった。
[Comparative Example 5]
In Example 1, it carried out similarly to Example 1 except having changed the single yarn fineness of the polylactic acid main fiber A into 2.5 dtex. The texture of the obtained wet nonwoven fabric was second grade and inferior to the texture.
本発明によれば、ポリ乳酸繊維を用いてなり引張強度および地合いに優れた湿式不織布、およびその製造方法が提供され、その工業的価値は極めて大である。 ADVANTAGE OF THE INVENTION According to this invention, the wet nonwoven fabric which uses polylactic acid fiber and was excellent in tensile strength and texture, and its manufacturing method are provided, The industrial value is very large.
Claims (8)
前記ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂの単糸繊度がともに０．６〜２．２ｄｔｅｘであり、かつ前記ポリ乳酸主体繊維Ａとポリ乳酸バインダー繊維Ｂとの重量比Ａ／Ｂが１５／８５〜８５／１５の範囲内であり、かつ湿式不織布の引張強度が、ＪＩＳ Ｐ８１１３に規定される裂断長で０．８ｋｍ以上であることを特徴とする湿式不織布。 It is composed of polylactic acid-based fibers A and polylactic acid binder fibers B, and is a wet nonwoven fabric having a basis weight of 10 to 100 g / m 2 ,
The single yarn fineness of the polylactic acid main fiber A and the polylactic acid binder fiber B are both 0.6 to 2.2 dtex, and the weight ratio A / B of the polylactic acid main fiber A and the polylactic acid binder fiber B is 15 A wet nonwoven fabric characterized by being in the range of / 85 to 85/15, and having a tensile strength of the wet nonwoven fabric of 0.8 km or more as a breaking length as defined in JIS P8113.
請求項１〜３のいずれかに記載の湿式不織布。 Both the polylactic acid main fiber A and the polylactic acid binder fiber B are no crimps.
The wet nonwoven fabric according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009023912A JP2010180492A (en) | 2009-02-04 | 2009-02-04 | Wet nonwoven fabric and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009023912A JP2010180492A (en) | 2009-02-04 | 2009-02-04 | Wet nonwoven fabric and method for producing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2010180492A true JP2010180492A (en) | 2010-08-19 |
Family
ID=42762215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2009023912A Pending JP2010180492A (en) | 2009-02-04 | 2009-02-04 | Wet nonwoven fabric and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2010180492A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012057105A1 (en) | 2010-10-27 | 2012-05-03 | 帝人ファイバー株式会社 | Biomass-derived polyester short fibers and wet nonwoven fabric formed from same |
| JP2014197995A (en) * | 2013-03-29 | 2014-10-23 | 大王製紙株式会社 | Mulching sheet |
| CN111279433A (en) * | 2017-11-02 | 2020-06-12 | 3M创新有限公司 | Heat conductive electric insulating material |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01169000A (en) * | 1987-12-25 | 1989-07-04 | Nippon Ester Co Ltd | Conjugated polyester fiber for wet non-woven cloth |
| JPH09319280A (en) * | 1996-05-29 | 1997-12-12 | Miki Tokushu Seishi Kk | Cleaning web |
| JP2000189733A (en) * | 1998-12-25 | 2000-07-11 | Futamura Chemical Industries Co Ltd | Oil filter |
| JP2003268691A (en) * | 2002-03-08 | 2003-09-25 | Toray Ind Inc | Wet lay nonwoven fabric |
| JP2003336124A (en) * | 2002-05-16 | 2003-11-28 | Nippon Ester Co Ltd | Non-crimped short-cut fiber of polylactic acid |
| JP2006346991A (en) * | 2005-06-16 | 2006-12-28 | Japan Vilene Co Ltd | Biodegradable base printing material |
| JP2008238147A (en) * | 2007-03-29 | 2008-10-09 | Hokuetsu Paper Mills Ltd | Semipermeable membrane support |
-
2009
- 2009-02-04 JP JP2009023912A patent/JP2010180492A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01169000A (en) * | 1987-12-25 | 1989-07-04 | Nippon Ester Co Ltd | Conjugated polyester fiber for wet non-woven cloth |
| JPH09319280A (en) * | 1996-05-29 | 1997-12-12 | Miki Tokushu Seishi Kk | Cleaning web |
| JP2000189733A (en) * | 1998-12-25 | 2000-07-11 | Futamura Chemical Industries Co Ltd | Oil filter |
| JP2003268691A (en) * | 2002-03-08 | 2003-09-25 | Toray Ind Inc | Wet lay nonwoven fabric |
| JP2003336124A (en) * | 2002-05-16 | 2003-11-28 | Nippon Ester Co Ltd | Non-crimped short-cut fiber of polylactic acid |
| JP2006346991A (en) * | 2005-06-16 | 2006-12-28 | Japan Vilene Co Ltd | Biodegradable base printing material |
| JP2008238147A (en) * | 2007-03-29 | 2008-10-09 | Hokuetsu Paper Mills Ltd | Semipermeable membrane support |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012057105A1 (en) | 2010-10-27 | 2012-05-03 | 帝人ファイバー株式会社 | Biomass-derived polyester short fibers and wet nonwoven fabric formed from same |
| KR20130141541A (en) | 2010-10-27 | 2013-12-26 | 데이진 가부시키가이샤 | Biomass-derived polyester short fibers and wet nonwoven fabric formed from same |
| US8741103B2 (en) | 2010-10-27 | 2014-06-03 | Teijin Limited | Biomass-derived polyester staple fibers and wet-laid nonwoven fabric formed from the same |
| US9062399B2 (en) | 2010-10-27 | 2015-06-23 | Teijin Limited | Biomass-derived polyester wet-laid nonwoven fabric |
| JP2014197995A (en) * | 2013-03-29 | 2014-10-23 | 大王製紙株式会社 | Mulching sheet |
| CN111279433A (en) * | 2017-11-02 | 2020-06-12 | 3M创新有限公司 | Heat conductive electric insulating material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4498001B2 (en) | Polyester composite fiber | |
| US7947644B2 (en) | Dryer sheet and methods for manufacturing and using a dryer sheet | |
| US20130216809A1 (en) | Fibrous structures and methods for making same | |
| WO2012057105A1 (en) | Biomass-derived polyester short fibers and wet nonwoven fabric formed from same | |
| CN103958772A (en) | Method for producing filler-containing paper by using biodegradable polyester fibers and/or polyalkylene carbonate fibers | |
| TWI686520B (en) | Polyester binder fiber | |
| US7943566B2 (en) | Dryer sheet and methods for manufacturing and using a dryer sheet | |
| KR20220140825A (en) | Composite nonwoven fabric and manufacturing method of composite nonwoven fabric | |
| JP2010180492A (en) | Wet nonwoven fabric and method for producing the same | |
| US8940135B2 (en) | Production of filled paper using biodegradable polyester fibers and/or polyalkylene carbonate fibers | |
| US20100314058A1 (en) | Sanitary tissue products comprising design elements | |
| JP2024507060A (en) | Biodegradable multi-component polymer fiber | |
| JP7148280B2 (en) | wet nonwoven fabric | |
| TW202202685A (en) | Washable cellulose acetate fiber blends for thermal insulation | |
| JP2003336124A (en) | Non-crimped short-cut fiber of polylactic acid | |
| JP2833784B2 (en) | Bulk paper having dispersibility in water and production method thereof | |
| JP2008237257A (en) | Polyester conjugated fiber aggregate for hygienic material | |
| JP2003268691A (en) | Wet lay nonwoven fabric | |
| JPWO2018139651A1 (en) | Method for producing non-crimped staple fiber, and wet non-woven fabric comprising the obtained non-crimped staple fiber | |
| US20230183890A1 (en) | Yarn | |
| JP7264618B2 (en) | Polyester heat-fusible fiber, method for producing the same, and wet-laid nonwoven fabric using the same | |
| JP5689626B2 (en) | Wet short fiber nonwoven fabric | |
| JP2003268692A (en) | Biodegradable synthetic fiber and wet lay nonwoven fabric | |
| JPH0711114A (en) | Monofilament produced from blend of polyester having 1,4-cyclohexanedimethanol as the polyhydric alcohol component and polyamide | |
| JPH02300398A (en) | Bulky paper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20110705 |
|
| RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20110705 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20111118 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20121114 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20121120 |
|
| A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A712 Effective date: 20130208 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20130402 |