JP2884091B2 - Degradable nonwoven fabric - Google Patents
Degradable nonwoven fabricInfo
- Publication number
- JP2884091B2 JP2884091B2 JP1157046A JP15704689A JP2884091B2 JP 2884091 B2 JP2884091 B2 JP 2884091B2 JP 1157046 A JP1157046 A JP 1157046A JP 15704689 A JP15704689 A JP 15704689A JP 2884091 B2 JP2884091 B2 JP 2884091B2
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- fiber
- fibers
- chitosan
- web
- 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 26
- 239000000835 fiber Substances 0.000 claims description 39
- 229920001661 Chitosan Polymers 0.000 claims description 23
- 229920003043 Cellulose fiber Polymers 0.000 claims description 12
- 239000011230 binding agent Substances 0.000 claims description 10
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 8
- 235000011187 glycerol Nutrition 0.000 claims description 4
- 239000004014 plasticizer Substances 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 239000002689 soil Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 12
- 150000003839 salts Chemical class 0.000 description 10
- 239000007864 aqueous solution Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 238000004080 punching Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 229920000297 Rayon Polymers 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- 239000002964 rayon Substances 0.000 description 5
- 229920002678 cellulose Polymers 0.000 description 4
- 239000001913 cellulose Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229920005610 lignin Polymers 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010893 paper waste Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-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
- 125000003277 amino group Chemical group 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
- D06M15/03—Polysaccharides or derivatives thereof
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Biological Depolymerization Polymers (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、使い捨て不織布や農業、土木分野で使用さ
れる不織布に関し、特に使用後土壌中で微生物により分
解・消失される不織布に関するものである。Description: TECHNICAL FIELD The present invention relates to disposable nonwoven fabrics and nonwoven fabrics used in the fields of agriculture and civil engineering, and more particularly to nonwoven fabrics that are decomposed and eliminated by microorganisms in soil after use. .
（従来技術及びその課題） 近年、オムツに代表される使い捨て不織布は、その便
利さから数多く使用されているが、使用後は土壌中で分
解せず、土壌汚染の原因となるから、埋立てによる処分
ができず、一般廃棄物と同様燃えるゴミとして公共の焼
却場で焼却処分されている。しかし、使い捨て不織布
は、他の使い捨てプラスチック製品と同様に、使用量の
増加に伴い、焼却炉の傷みや排ガス中の有害成分を生じ
て、社会問題となりつつある。(Prior art and its problems) In recent years, disposable nonwoven fabrics represented by diapers have been widely used due to their convenience. However, they do not decompose in the soil after use and cause soil contamination. It cannot be disposed of and is incinerated at a public incinerator as flammable garbage like general waste. However, disposable nonwoven fabrics, like other disposable plastic products, are becoming a social problem due to damage to incinerators and harmful components in exhaust gas as the amount of use increases.
また、農業、土木分野においても使用後そのまま土中
に放置される育苗マット、育苗ポット、植生マット等に
も種々の素材からなる不織布が使用されている。Also, in the fields of agriculture and civil engineering, nonwoven fabrics made of various materials are used for seedling mats, seedling pots, vegetation mats and the like which are left in the soil after use.
これら製品の不織布素材のうち、鉱物繊維であるロッ
クウールは、安価で、親水性と適度の空隙を有するため
に、数多く使用されているが、シート状でしか使用でき
ないため、成型性の点で問題があるばかりか、土中にお
いても微生物により分解しないという問題がある。Among the nonwoven fabric materials of these products, rock wool, which is a mineral fiber, is inexpensive, hydrophilic and has appropriate voids, so many are used.However, since it can be used only in the form of a sheet, it is difficult to mold. Not only is there a problem, but there is a problem that it is not decomposed by microorganisms even in the soil.
また、古紙から再生されたパルプは、安価で、かつ親
水性と保水性に優れているため、シート状やポット状に
加工されて使用されている。しかし、パルプに含まれて
いるリグニンによりパルプの分解が阻害され、またリグ
ニンや元々の古紙に含有されていたアクリル酸アミドの
ような強度向上剤が土壌中に蓄積されて土壌汚染の原因
ともなるという問題がある。Further, pulp recycled from waste paper is inexpensive, and has excellent hydrophilicity and water retention, so that it is used after being processed into a sheet or pot shape. However, lignin contained in pulp inhibits the decomposition of pulp, and lignin and strength improvers such as acrylic acid amide contained in the original waste paper are accumulated in the soil, causing soil contamination There is a problem.
そこで、農業、土木分野において、これらの問題を解
決するため、、リグニン含有量の少ない綿又はレーヨン
のようなセルロース系繊維を使用した、織物、ニードル
パンチ不織布、ウオーターパンチ不織布、湿式レーヨン
スパンボンド等が使用されている。Therefore, in the field of agriculture and civil engineering, in order to solve these problems, a woven fabric, a needle-punched nonwoven fabric, a water-punched nonwoven fabric, a wet rayon spunbond, etc., using a cellulose fiber such as cotton or rayon having a low lignin content. Is used.
これらの繊維集合体は、１〜３ケ月の期間で、土壌中
の微生物により完全に分解され、土壌汚染を発生させる
ことはないが、成型加工ができないため、一般的にシー
ト状でしか使用できず、用途に制限を受けることが多
い。特殊なものとして、糸で縫製され袋状にしたものが
あるが、高価になる。また、これらの素材で自然分解に
より形状を解体することは不可能であり、最終的には焼
却によって処分せざるを得ないという問題がある。These fiber aggregates are completely decomposed by microorganisms in the soil in a period of 1 to 3 months and do not cause soil contamination, but cannot be molded and processed, and therefore can be generally used only in a sheet form. And the use is often restricted. As a special thing, there is a thing sewn with a thread and made into a bag shape, but it becomes expensive. Further, it is impossible to disassemble the shape of these materials by natural decomposition, and there is a problem that they must be finally disposed of by incineration.
（課題を解決するための手段及び作用） 本発明は、湿潤状態における形態保持力と耐水強度と
成型性とを有し、かつ土壌中において微生物により分解
・消失可能にするために、セルロース系繊維のみで構成
した繊維ウェブの構成繊維間を、キトサンと直径１μｍ
以下の微細セルロース繊維とを含有した繊維間結合剤で
結合固定して成る。(Means and Actions for Solving the Problems) The present invention provides a cellulosic fiber which has shape retention in a wet state, water resistance and moldability, and is capable of being decomposed and eliminated by microorganisms in soil. Between chitosan and 1 μm in diameter
It is formed by binding and fixing with an inter-fiber binder containing the following fine cellulose fibers.
また、上記繊維間結合剤に、グリセリン又は澱粉を可
塑剤として、耐水性を損なわない混合比率で混合する
と、分解性不織布の風合いを軟らかくすることができ
る。When glycerin or starch is used as a plasticizer in the inter-fiber binder at a mixing ratio that does not impair the water resistance, the texture of the degradable nonwoven fabric can be softened.
ところで、上記セルロース系繊維としては、セルロー
ス構造体を有する綿、麻、レーヨン等の天然繊維又は再
生繊維を単独又は混合して使用することができるが、好
ましくは表面積の大きい多孔質レーヨン繊維を使用する
と、土壌中での繊維の分解速度を早めることができる。
そして、これらのセルロース系繊維を公知のウェブ形成
機でパラレルウェブ、クロスェブ又はランダムウェブの
繊維ウェブを構成するか、またはこれらのウェブにニー
ドルパンチ加工又はウオーターパンチ加工を施して物理
的に交絡した繊維ウェブを構成する。By the way, as the above-mentioned cellulosic fiber, natural fibers such as cotton, hemp and rayon having a cellulosic structure or regenerated fibers can be used alone or as a mixture, but porous rayon fibers having a large surface area are preferably used. Then, the decomposition rate of the fiber in the soil can be increased.
Then, these cellulosic fibers are formed into a parallel web, a cross web or a random web fiber web by a known web forming machine, or a fiber in which these webs are subjected to needle punching or water punching to be physically entangled. Make up the web.
本発明に係る分解性不織布は、上記繊維間結合剤とし
て、キトサンと直径１μｍ以下の微細セルロース繊維と
を混合した、キトサン塩水溶液（即ち、酢酸又はクエン
酸のような有機酸0.5〜1.0％水溶液中にキトサンを0.5
〜1.0％濃度になるように溶解し、パルプを叩解等して
得た微細セルロース繊維を混合したキトサン塩水溶液）
を浸漬法又はスプレー法等で以てセルロース系繊維から
なる繊維ウェブに、繊維間結合剤（キトサン＋微細セル
ロース繊維）の付着量が繊維100部（固形分）に対して
所定量になるように調整後加熱乾燥して形成したもので
ある。The degradable nonwoven fabric according to the present invention is a chitosan salt aqueous solution (i.e., an organic acid 0.5 to 1.0% aqueous solution such as acetic acid or citric acid) obtained by mixing chitosan and fine cellulose fibers having a diameter of 1 μm or less as the inter-fiber binder. 0.5 chitosan inside
Chitosan salt solution mixed with fine cellulose fiber obtained by dissolving to a concentration of ~ 1.0% and beaten pulp etc.)
By a dipping method or a spraying method so that the amount of the interfiber binder (chitosan + fine cellulose fiber) attached to the fiber web composed of the cellulosic fiber is a predetermined amount with respect to 100 parts (solid content) of the fiber. It is formed by heating and drying after adjustment.
第１図は本発明に係る分解性不織布の一例を示し、セ
ルロース系繊維のみの構成繊維１からなるクロスウェブ
２にニードルパンチ処理３を施して、この仮止めウェブ
の構成繊維間を繊維間結合剤４で以て結合固定したもの
である。FIG. 1 shows an example of a decomposable nonwoven fabric according to the present invention, in which a cross web 2 composed of constituent fibers 1 composed of only cellulosic fibers is subjected to a needle punching treatment 3 to bond the constituent fibers of this temporarily fixed web between fibers. It was bound and fixed with Agent 4.
第２図はセルロース系繊維と繊維間結合剤の反応前の
状態を示し、第３図は同反応後の状態を示す。この図に
おいて、1aはセルロース系繊維、1bは微細セルロース、
4aはキトサン塩である。FIG. 2 shows a state before the reaction between the cellulosic fiber and the inter-fiber binder, and FIG. 3 shows a state after the reaction. In this figure, 1a is a cellulosic fiber, 1b is fine cellulose,
4a is chitosan salt.
ところで、キトサン塩水溶液は、乾燥すると固化する
ことが知られているが、この固化物は、キトサン塩であ
るため、アルカリ固定処理しなければ水中で膨潤し、さ
らには溶解してしまう。しかし、キトサンを微細セルロ
ース繊維及びセルロース系繊維と共に加熱乾燥すれば、
セルロースとの反応が生じて、水中でも溶解することは
ない。By the way, it is known that an aqueous solution of chitosan salt solidifies when dried, but since the solidified product is a chitosan salt, it swells in water and further dissolves unless subjected to an alkali fixing treatment. However, if chitosan is dried by heating with fine cellulose fibers and cellulosic fibers,
It reacts with cellulose and does not dissolve in water.
本発明においては、加熱乾燥によってキトサン塩4aの
有するアミノ基と、微細セルロース繊維1b及びセルロー
ス系繊維1aの表面に存在する水酸基（OH）やカルボニル
基（CO）とが反応して、繊維間が結合固定されているか
ら、アルカリ固定処理が省略可能となり、湿潤状態にお
ける形態保持力及び耐水強度が向上するものである。In the present invention, the amino group of the chitosan salt 4a reacts with the hydroxyl group (OH) or the carbonyl group (CO) present on the surface of the fine cellulose fiber 1b and the cellulosic fiber 1a by heating and drying, and the space between the fibers is reduced. Since they are fixed by bonding, the alkali fixing treatment can be omitted, and the shape retention in a wet state and the water resistance are improved.
（実施例１） 一般に市販されているレーヨン繊維2d×38mmをセルロ
ース系繊維として使用し、公知のカード及びクロスラッ
パーやランドウェッバー等のウェブ形成機を用いて、例
えば目付100g/m2のクロスウェブを形成する。次に、こ
のウェブをニードルパンチ機にかけて、100P/cm2のニー
ドルパンチ処理を施して、仮止めされたニードルパンチ
ウェブを作製した。Example 1 A commercially available rayon fiber 2d × 38 mm is used as a cellulosic fiber, and using a known card and a web forming machine such as a cross wrapper or a land webber, for example, a cross web having a basis weight of 100 g / m 2 . To form Next, the web was passed through a needle punching machine and subjected to a needle punching treatment at 100 P / cm 2 to produce a temporarily-punched needle punch web.
次に、キトサン：酢酸＝1:0.5（重量比）で濃度１％
に調製したキトサン塩水溶液に、直径１μｍ以下の微細
セルロース繊維を濃度１％の水懸濁液を、微細セルロー
ス繊維：キトサン＝30:70（重量比）となるように混合
し、濃度１％の微細セルロース−キトサン塩水溶液を調
製した。そして、上記微細セルロース−キトサン塩水溶
液が固形分で2g/m2になるように、上記仮止めウェブを
浸漬加工した後、熱風乾燥機中で100℃×５分間乾燥処
理を行って、仮止めウェブの繊維間相互の交差・接触部
分が微細セルロース繊維−キトサン−セルロース系繊維
の三者が反応によって結合固定した分解性不織布を作製
した。Next, chitosan: acetic acid = 1: 0.5 (weight ratio) and concentration 1%
A 1% aqueous suspension of fine cellulose fibers having a diameter of 1 μm or less is mixed with the aqueous chitosan salt solution prepared in (1) so that the fine cellulose fibers: chitosan = 30: 70 (weight ratio). A fine cellulose-chitosan salt aqueous solution was prepared. Then, the temporary fixing web is immersed so that the fine cellulose-chitosan salt aqueous solution becomes 2 g / m 2 in solid content, and then subjected to a drying treatment in a hot air drier at 100 ° C. for 5 minutes to temporarily fix the web. A decomposable nonwoven fabric was prepared in which the crossing and contact portions between the fibers of the web were bonded and fixed by a reaction of fine cellulose fiber-chitosan-cellulosic fiber at the three points.
（実施例２） 実施例１と同一の仮止めウェブと微細セルロース−キ
トサン塩水溶液とを用い、微細セルロース繊維：キトサ
ン：グリセリン＝30:50:20（重量比）となるように、可
塑剤としてグリセリンを添加して濃度１％に調製した微
細セルロース−キトサン塩水溶液を用いて、実施例１と
同様の処理を行って分解性不織布を作製した。(Example 2) Using the same temporary fixing web as in Example 1 and a fine cellulose-chitosan salt aqueous solution, a fine cellulose fiber: chitosan: glycerin = 30: 50: 20 (weight ratio) as a plasticizer. Using a fine cellulose-chitosan salt aqueous solution adjusted to a concentration of 1% by adding glycerin, the same treatment as in Example 1 was performed to produce a degradable nonwoven fabric.
比較例１ 実施例と同じ目付100g/m2のクロスウェブを用いて、
アクリル酸エステルエマルジョンを固形分で2g/m2にな
るように浸漬加工した後、熱風乾燥機中に100℃×５分
間、150℃×３分間乾燥処理して不織布を作製した。Comparative Example 1 Using the same cross web having a basis weight of 100 g / m 2 as in the example,
The acrylate emulsion was immersed to a solid content of 2 g / m 2 and then dried in a hot air drier at 100 ° C. for 5 minutes and 150 ° C. for 3 minutes to produce a nonwoven fabric.
比較例２ アクリル酸エステルエマルジョンを固形分で40g/m2に
なるように浸漬加工した後、比較例１と同様に処理して
不織布を作製した。Comparative Example 2 An acrylate emulsion was immersed in a solid content of 40 g / m 2 , and then treated in the same manner as in Comparative Example 1 to produce a nonwoven fabric.
比較例３ SBRエマルジョンを固形分で40g/m2になるように浸漬
加工した後、比較例１と同様に処理して不織布を作製し
た。Comparative Example 3 An SBR emulsion was immersed to a solid content of 40 g / m 2 and treated in the same manner as in Comparative Example 1 to produce a nonwoven fabric.
比較例４ ケン化度80％のPVA水溶液を固形分で20g/m2になるよ
うに浸漬加工した後、比較例１と同様に処理して不織布
を作製した。Comparative Example 4 A non-woven fabric was prepared by immersing a PVA aqueous solution having a saponification degree of 80% so as to have a solid content of 20 g / m 2 , in the same manner as in Comparative Example 1.
以上の実施例及び比較例で得られた不織布の試料につ
いて、仕上がり目付、乾強度、湿強度（＊１）、成型性
（＊２）及び乾湿強度比（＊３）を測定したところ、第
１表の結果を得た。For the nonwoven fabric samples obtained in the above Examples and Comparative Examples, the finished basis weight, dry strength, wet strength (* 1), moldability (* 2) and dry / wet strength ratio (* 3) were measured. The results in the table were obtained.
次に、上記実施例及び比較例による６種類の不織布を
土壌中（地面より5cm内部）に埋設し、３ケ月後に分解
の程度を観察した結果を第２表に示す。 Next, Table 6 shows the results of observing the degree of decomposition after three months after embedding the six types of nonwoven fabrics according to the above Examples and Comparative Examples in the soil (5 cm inside the ground).
第１、２表から明らかなように、実施例は、一般の合
成樹脂、合成ゴム結合剤を用いた比較例に比べ、非常に
少量のキトサンの使用により乾燥強度及び成型性に優れ
たものであった。また、分解性についても、実施例は、
比較例と比べ優れた効果があることが判明した。 As is clear from Tables 1 and 2, the examples are superior in dry strength and moldability due to the use of a very small amount of chitosan, as compared with comparative examples using general synthetic resins and synthetic rubber binders. there were. Also, regarding the degradability, the examples are as follows.
It was found that there was an excellent effect as compared with the comparative example.
ところで、比較例４の不織布は、繊維及び樹脂とも消
失したが、農業用育苗シートや容器、土木・建築用のコ
ンクリートパネルや土壌安定材や築堤材に用いると、PV
A樹脂が水溶性であるため、短時間で不織布の形態が崩
壊してしまい、全く目的の用途に使用できない。By the way, the nonwoven fabric of Comparative Example 4 lost both the fiber and the resin. However, when used for agricultural seedling-raising sheets and containers, concrete panels for civil engineering and construction, soil stabilizers and embankment materials, PV
Since the resin A is water-soluble, the form of the nonwoven fabric collapses in a short time and cannot be used for the intended use at all.
（発明の効果） 本発明によるときは、繊維ウェブの構成繊維が微細セ
ルロース繊維−キトサン−セルロース系繊維の三者の橋
架け結合によって固定されているから、湿潤状態におけ
る形態保持力と耐水強度と成型性を有し、種々の形状に
加工成型して各種用途に適応することができ、また高価
なキトサンの使用が少量ですみ、経済性を有する。ま
た、土壌中の微生物によって短期間で分解されて完全に
消失するから、特に土中に埋設して使用する農業・土木
分野の製品に使用すると、使用後の回収・焼却処分が不
要となり、廃棄処分に伴う公害問題も発生しないという
等の効果を有するものである。(Effects of the Invention) According to the present invention, since the constituent fibers of the fibrous web are fixed by a bridge connection of fine cellulose fibers-chitosan-cellulosic fibers, the form retention force and water resistance in a wet state are improved. It has moldability, can be processed into various shapes and can be adapted to various uses, and requires only a small amount of expensive chitosan, and is economical. Also, since it is decomposed in a short period of time by microorganisms in the soil and completely disappears, it is unnecessary to collect and incinerate after use, especially when used for products in the fields of agriculture and civil engineering buried in the soil. This has the effect that no pollution problem will occur with the disposal.
第１図は本発明の一実施例を示す分解性不織布の概略構
成断面図、第２図はセルロース系繊維と繊維間結合剤の
反応前の状態を示す構造模式図、第３図は同反応後の状
態を示す構造模式図である。 １……構成繊維 1a……セルロース系繊維 1b……微細セルロース系繊維 ２……クロスウェブ ３……ニードルパンチ処理 ４……繊維間結合剤 4a……キトサン塩FIG. 1 is a schematic sectional view of a decomposable nonwoven fabric showing one embodiment of the present invention, FIG. 2 is a schematic structural diagram showing a state before a reaction between a cellulosic fiber and an interfiber binder, and FIG. It is a structure schematic diagram which shows a state after. DESCRIPTION OF SYMBOLS 1 ... Constituent fiber 1a ... Cellulose fiber 1b ... Fine cellulosic fiber 2 ... Cross web 3 ... Needle punching treatment 4 ... Fiber binding agent 4a ... Chitosan salt
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西山 昌史 香川県高松市花の宮町２丁目３番３号 工業技術院四国工業技術試験所内 (72)発明者 細川 純 香川県高松市花の宮町２丁目３番３号 工業技術院四国工業技術試験所内 (72)発明者 久保 隆昌 香川県高松市花の宮町２丁目３番３号 工業技術院四国工業技術試験所内 (72)発明者 吉原 一年 香川県高松市花の宮町２丁目３番３号 工業技術院四国工業技術試験所内 (56)参考文献 特開 平１−97300（ＪＰ，Ａ) 特開 昭57−11258（ＪＰ，Ａ) 特開 昭56−26049（ＪＰ，Ａ) 特開 昭62−223399（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) D04H 1/42,1/58 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masashi Nishiyama 2-3-3 Hananomiyacho, Takamatsu City, Kagawa Prefecture Inside the Industrial Technology Research Institute, Shikoku (72) Inventor Jun Hosokawa Hananomiya, Takamatsu City, Kagawa Prefecture 2-3-3, Machi-cho, Shikoku Industrial Technology Laboratory (72) Inventor Takamasa Kubo 2-3-3, Hana no Miyamachi, Takamatsu City, Kagawa Prefecture, Shikoku Industrial Technology Laboratory (72) Inventor Yoshihara One year 2-3-3 Hananomiyacho, Takamatsu City, Kagawa Prefecture Inside the Industrial Technology Research Institute, Shikoku (56) References JP-A-1-97300 (JP, A) JP-A-57-11258 (JP, A JP-A-56-26049 (JP, A) JP-A-62-223399 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) D04H 1 / 42,1 / 58
Claims (2)
ブの構成繊維間を、キトサンと直径１μｍ以下の微細セ
ルロース繊維とを含有した繊維間結合剤で結合固定した
ことを特徴とする分解性不織布。1. A decomposable nonwoven fabric characterized in that fibers constituting a fibrous web composed only of cellulosic fibers are bonded and fixed with an interfiber binder containing chitosan and fine cellulose fibers having a diameter of 1 μm or less.
又は澱粉を含有した請求項１に記載の分解性不織布。2. The decomposable nonwoven fabric according to claim 1, wherein the interfiber binder contains glycerin or starch as a plasticizer.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1157046A JP2884091B2 (en) | 1989-06-20 | 1989-06-20 | Degradable nonwoven fabric |
| DE19904019446 DE4019446A1 (en) | 1989-06-20 | 1990-06-19 | Shapable biodegradable composite sheet - comprising fibre felt of natural or regenerated cellulosic fibres and chitosan salt binder |
| US07/782,778 US5308663A (en) | 1989-06-20 | 1991-10-23 | Biodegradable nonwoven fabric and its molding vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1157046A JP2884091B2 (en) | 1989-06-20 | 1989-06-20 | Degradable nonwoven fabric |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0327165A JPH0327165A (en) | 1991-02-05 |
| JP2884091B2 true JP2884091B2 (en) | 1999-04-19 |
Family
ID=15641013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1157046A Expired - Fee Related JP2884091B2 (en) | 1989-06-20 | 1989-06-20 | Degradable nonwoven fabric |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2884091B2 (en) |
| DE (1) | DE4019446A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9012709U1 (en) * | 1990-09-06 | 1990-11-08 | Bartling-Werke Friedr.-Aug. Bartling GmbH & Co. KG, 4714 Selm | Containers made of paper or cardboard, especially paper plates |
| JPH0526047U (en) * | 1991-02-19 | 1993-04-06 | 工業技術院長 | Biodegradable litter |
| DE4114294A1 (en) * | 1991-05-02 | 1992-11-05 | Blumenerdenwerk Stender Gmbh & | PLANTING PLATE |
| JP2571738B2 (en) * | 1992-01-13 | 1997-01-16 | 富士紡績株式会社 | Non-woven |
| DE4242175A1 (en) * | 1992-12-15 | 1994-06-16 | Dusan Kopriva | Rapidly bio-degradable utility article - formed of moulded mixt. of inorganic and organic components |
| JPH07108161B2 (en) * | 1993-07-02 | 1995-11-22 | 青森県 | Fixing method and fixing agent for ornamental soil, and terrarium products |
| US5454191A (en) * | 1994-03-11 | 1995-10-03 | Mayeda; Ted | Flexible pouch-like hanging basket liner |
| DE4420088C3 (en) * | 1994-06-09 | 2001-02-15 | Stockhausen Chem Fab Gmbh | Process for producing a water-absorbing fabric and its use |
| DE19515607A1 (en) * | 1995-04-28 | 1996-10-31 | Johannes Prof Dr Rer N Gartzen | Mfr. of cheap plant and flower pots from paper waste sludge |
| DE102012005588A1 (en) * | 2012-03-20 | 2013-11-28 | Stephan Kühn | Composite material based on chitosan matrix, useful for producing e.g. insulation boards, construction shells, comprises connection of carrier and fiber material with the matrix, substitute of adhesives and substitute composite material |
| NL2013285B1 (en) * | 2014-07-31 | 2016-09-21 | Bas Van Buuren B V | Raw material blend for a compressed growing medium, the compressed growing medium and a method for making the same. |
| JP7552200B2 (en) * | 2020-09-29 | 2024-09-18 | セイコーエプソン株式会社 | Manufacturing method of molded body |
| JP7552201B2 (en) * | 2020-09-29 | 2024-09-18 | セイコーエプソン株式会社 | Manufacturing method of molded body |
| SE544929C2 (en) * | 2021-05-04 | 2023-01-10 | Organoclick Ab | Biobased binder compositions for airlaid nonwoven materials |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5626049A (en) * | 1979-08-06 | 1981-03-13 | Mitsubishi Rayon Co | Chitine or chitine derivative nonwoven fabric and method |
| JPS6020520B2 (en) * | 1980-06-17 | 1985-05-22 | 工業技術院長 | Method for manufacturing binder for papermaking |
| JPS62223399A (en) * | 1986-03-24 | 1987-10-01 | 株式会社 君津化学研究所 | Chitosan nonwoven sheet and its production |
| US4755421A (en) * | 1987-08-07 | 1988-07-05 | James River Corporation Of Virginia | Hydroentangled disintegratable fabric |
-
1989
- 1989-06-20 JP JP1157046A patent/JP2884091B2/en not_active Expired - Fee Related
-
1990
- 1990-06-19 DE DE19904019446 patent/DE4019446A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0327165A (en) | 1991-02-05 |
| DE4019446A1 (en) | 1991-01-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2884091B2 (en) | Degradable nonwoven fabric | |
| US5308663A (en) | Biodegradable nonwoven fabric and its molding vessel | |
| US5252332A (en) | Pre-moistened flushable towlette impregnated with polyvinyl alcohol containing binders | |
| EP0303528B1 (en) | Hydroentangled disintegratable fabric | |
| DE69811646T2 (en) | DISPERSIBLE FLEECE AND PRODUCTION METHOD | |
| CN100350010C (en) | Improvement in the wet tensile strength of nonwoven webs | |
| US6319863B1 (en) | Water-disintegratable fibrous sheet containing modified polyvinyl alcohol | |
| JPH0770900A (en) | Binder composition and web material formed of it | |
| JPH10504613A (en) | Nonwoven material containing a certain percentage of recycled fibers generated from nonwoven fabric and / or textile waste | |
| JPH04505870A (en) | biodegradable incontinence devices | |
| JPH108364A (en) | Water disintegrable conjugate fiber and nonwoven fabric, absorbent article | |
| DE2361468A1 (en) | ENZYMATICALLY DEGRADABLE FLEECE | |
| JPH06248552A (en) | Biodegradable fiber composition and hot melt adhesive fiber useful therefor | |
| JP2788961B2 (en) | Biodegradable nonwoven | |
| Shamsudin et al. | Properties of oil sorbent material produced from kenaf fiber | |
| JP3662738B2 (en) | Biodegradable nonwoven fabric | |
| JP2836785B2 (en) | Biodegradable filter unit | |
| JPH03241050A (en) | Decomposable nonwoven fabric sheet and production thereof | |
| US20070015423A1 (en) | Dry chemically bound nonwovens which are flushable and dispersible | |
| JP2004243233A (en) | Biodegradable filter media | |
| JP2788962B2 (en) | Biodegradable nonwoven | |
| JP3667128B2 (en) | Water-decomposable short fiber nonwoven fabric and method for producing the same | |
| JP2007000728A (en) | Oil adsorbing mat and method for treating oil adsorbing mat | |
| JPH06248548A (en) | Biodegradable nonwoven fabric material | |
| JPH0526047U (en) | Biodegradable litter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |