JPS6246679B2 - - Google Patents
Info
- Publication number
- JPS6246679B2 JPS6246679B2 JP5517378A JP5517378A JPS6246679B2 JP S6246679 B2 JPS6246679 B2 JP S6246679B2 JP 5517378 A JP5517378 A JP 5517378A JP 5517378 A JP5517378 A JP 5517378A JP S6246679 B2 JPS6246679 B2 JP S6246679B2
- Authority
- JP
- Japan
- Prior art keywords
- ultrafine
- short fibers
- paper
- fibers
- polyvinyl alcohol
- 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
Links
- 239000000835 fiber Substances 0.000 claims description 69
- 229920001410 Microfiber Polymers 0.000 claims description 57
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 27
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 11
- 229920001059 synthetic polymer Polymers 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000002166 wet spinning Methods 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 12
- 239000004744 fabric Substances 0.000 description 8
- 239000003658 microfiber Substances 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 239000002649 leather substitute Substances 0.000 description 5
- 238000009987 spinning Methods 0.000 description 5
- 229920000728 polyester Polymers 0.000 description 4
- 238000009736 wetting Methods 0.000 description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 238000010009 beating Methods 0.000 description 3
- 238000004043 dyeing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000012770 industrial material Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- -1 diaphragms Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920006240 drawn fiber Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Landscapes
- Paper (AREA)
Description
【発明の詳細な説明】
本発明は、合成重合体より成り均一な繊維横断
面を有する極細繊維を主成分とし、乾燥時の取り
扱い性に優れ且つ湿潤時急速に強力を失なう極細
繊維紙およびその製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an ultrafine fiber paper which is made of a synthetic polymer and whose main component is ultrafine fibers with a uniform fiber cross section, which has excellent handling properties when dry and rapidly loses its strength when wet. and its manufacturing method.
近年0.5デニール以下の極細繊維の製造技術が
種々開発され、人工皮革、過材、吸着材等に用
いられつつある。これらの用途では、殆んどの場
合極細繊維をシート化しなければならないが0.5
デニール以下の極細繊維のシート化は通常のカー
ド機、ウエツバー等では均一なシート化が困難で
あり、このため２成分以上の重合体の複合紡糸に
よる１デニール以上の単繊維をシート化した後一
成分を溶出するかあるいは膨潤剤を用いて二成分
以上に分割することにより極細繊維シートを得る
方法が行なわれている。また極細繊維を仮接着
し、みかけ上１デニール以上の繊維束としてシー
ト形成する方法も試みられている。しかし、これ
らの方法は、極めて複雑なプロセスを必要とし、
工業的実施には多くの不利を伴なう。 In recent years, various manufacturing technologies for ultrafine fibers of 0.5 denier or less have been developed and are being used for artificial leather, diaphragms, adsorbents, etc. For these applications, ultrafine fibers must be made into sheets in most cases, but 0.5
It is difficult to form ultrafine fibers with a denier or less into a uniform sheet using ordinary card machines, wet bars, etc. For this reason, after forming a single fiber of 1 denier or more into a sheet by composite spinning of a polymer of two or more components, A method of obtaining an ultrafine fiber sheet is carried out by eluting the components or dividing the components into two or more components using a swelling agent. Furthermore, a method of temporarily bonding ultrafine fibers to form a sheet as a fiber bundle with an apparent denier of 1 denier or more has also been attempted. However, these methods require extremely complex processes and
Industrial implementation is associated with a number of disadvantages.
一方、所謂フラツシユ紡糸、スプレー紡糸法な
どにより極細短繊維を製造する技術も開発され、
これらの場合は紡出短繊維を直接シート化できる
可能性がある。しかし、このような短繊維は延伸
することが出来ないため配向度が低くまた繊維は
不規則であり、高級衣料用、高級人工皮革用等に
は用いることが出来ない。 On the other hand, techniques for producing ultrafine staple fibers using so-called flat spinning and spray spinning methods have also been developed.
In these cases, there is a possibility that the spun short fibers can be directly formed into sheets. However, since such short fibers cannot be drawn, their degree of orientation is low and the fibers are irregular, so they cannot be used for high-grade clothing, high-grade artificial leather, etc.
本発明者らは先に従来は困難とされていた湿式
紡糸法による、均一な横断面を有する極細繊維を
開発し、特願昭52−35778号で提案した。本発明
者らはこの極細繊維の応用について種々研究した
結果、本発明に到達したものである。すなわち、
本発明は繊維形成性合成重合体を湿式紡糸し、延
伸して得られる平均単繊維度が0.5デニール以下
で、単繊維繊度の変動係数が20％以下の極細繊維
紙を主体として極細短繊維に対して20重量％以下
３重量％以上の熱水可溶性ポリビニルアルコール
短繊維を含有し、該ポリビニルアルコール短繊維
が部分的に溶融して極細短繊維同志を仮接着して
構成され、乾燥時の経方向の強度が50Kg／cm／
ｇ／cm2以上で且つ湿潤したときに60秒以内に前記
強度が乾燥時の1/5以下に低下することを特徴と
する極細繊維紙を第１番目の発明の要旨とし、又
繊維形成性合成重合体を湿式紡糸し、延伸して得
られた平均単繊維繊度が0.5デニール以下で、単
繊維繊度の変動係数が20重量％以下３重量％以上
の極細短繊維を、該極細短繊維に対して20重量％
以下の熱水可溶性ポリビニルアルコール短繊維と
ともに抄造し、次いでポリビニルアルコール短繊
維が部分的に溶融する温度で乾燥することを特徴
とする極細繊維紙の製法を第２番目の発明の要旨
とするものである。 The present inventors previously developed ultrafine fibers having a uniform cross section by a wet spinning method, which had been considered difficult in the past, and proposed it in Japanese Patent Application No. 35778/1983. The present inventors have arrived at the present invention as a result of various studies on the applications of this ultrafine fiber. That is,
The present invention produces ultra-fine short fibers by wet-spinning and drawing a fiber-forming synthetic polymer, mainly using ultra-fine fiber paper with an average filament density of 0.5 denier or less and a coefficient of variation of filament fineness of 20% or less. Contains hot water soluble polyvinyl alcohol short fibers in an amount of 20% by weight or more but not less than 3% by weight, and the polyvinyl alcohol short fibers are partially melted and the ultrafine short fibers are temporarily bonded together. Directional strength is 50Kg/cm/
The gist of the first invention is an ultrafine fiber paper characterized in that the strength is reduced to 1/5 or less of dry strength within 60 seconds when wetted with a fiber-forming property of at least 1 g/ cm2 . Ultrafine short fibers obtained by wet spinning and drawing a synthetic polymer have an average single fiber fineness of 0.5 denier or less and a coefficient of variation of single fiber fineness of 20% by weight or more and 3% by weight or more, into the ultrafine short fibers. 20% by weight
The gist of the second invention is a method for producing ultrafine fiber paper, which is characterized in that paper is made with the following hot water-soluble polyvinyl alcohol short fibers and then dried at a temperature at which the polyvinyl alcohol short fibers partially melt. be.
本発明を更に詳細に説明すると、本発明の第１
の特徴は、前述の先行発明による延伸された均一
な極細繊維を用いることで、このため広汎な用途
に有利に使用出来ることであり、又第２の特徴
は、この極細繊維を乾燥時の強力が高く且つ湿潤
時急速に強力を失なうような、均質な紙に形成す
ることである。この極細繊維紙は、乾燥時の取り
扱いが容易で、張力のかかる加工工程にも耐える
ことが出来る。また、湿潤により急速に強力を失
なうため、極細繊維紙を繊維ウエブ、編織物、不
織布のような基布に積層し高圧噴射水流処理を行
なうことにより、容易に基布と一体化し、極細繊
維のシートを得ることが出来る。このようにし
て、本発明により、衣料用、人工皮革用、産業資
材用等に広く利用出来る極細繊維シートを、経済
的に極めて有利に製造することが可能となるので
ある。 To explain the present invention in more detail, the first aspect of the present invention
The feature of this is that it uses the drawn uniform ultrafine fibers according to the prior invention described above, so it can be advantageously used in a wide range of applications.The second feature is that the ultrafine fibers have a strong The objective is to form a homogeneous paper that has a high strength and rapidly loses its strength when wet. This microfiber paper is easy to handle when dry and can withstand high tension processing processes. In addition, since it quickly loses its strength when wet, by laminating microfiber paper on a base fabric such as a fiber web, knitted fabric, or nonwoven fabric and applying high-pressure water jet treatment, it can be easily integrated with the base fabric and become ultrafine. A sheet of fiber can be obtained. In this way, the present invention makes it possible to economically produce extremely fine fiber sheets that can be widely used for clothing, artificial leather, industrial materials, etc.
本発明に用いる極細繊維は、繊維形成性合成重
合体を湿式紡糸し、延伸して得られる平均繊維繊
度が0.5デニール以下で、該単繊維繊度の変動係
数が20％以下のもので、このような極細繊維は、
たとえば粘度30〜200ポイズの繊維形成性合成重
合体紡糸原液を孔径10〜50μの紡糸口金を用いて
湿式紡糸し、延伸することによつて得られる。 The ultrafine fibers used in the present invention are obtained by wet spinning and drawing a fiber-forming synthetic polymer, and have an average fiber fineness of 0.5 denier or less, and a coefficient of variation of the single fiber fineness of 20% or less. The ultra-fine fiber is
For example, it can be obtained by wet-spinning a fiber-forming synthetic polymer spinning dope having a viscosity of 30 to 200 poise using a spinneret with a pore size of 10 to 50 μm, and then drawing it.
ここで用いられる繊維形成性合成重合体は、湿
式紡糸が容易に行えるものであればいずれも使用
可能であり、例えばポリアクリロニトリル系重合
体、ポリビニルアルコール系重合体、ポリ塩化ビ
ニル系重合体、ポリアミド系重合体、ポリイミド
系重合体、ポリエステル系重合体等を挙げること
が出来る。 The fiber-forming synthetic polymer used here can be any one that can be easily wet-spun, such as polyacrylonitrile polymers, polyvinyl alcohol polymers, polyvinyl chloride polymers, and polyamides. Examples include polyester polymers, polyimide polymers, and polyester polymers.
上述のようにして得られる極細繊維の単繊維繊
度は0.5デニール以下であるが、特に望ましくは
0.2デニール以下である。このような極細繊度に
おいて、極細繊維の効果が大きく発揮され易いか
らである。極細繊維は場合によつては連続長繊維
をシート化することも出来るが、望ましい方法と
しては、繊維長１〜５mmに切断しシート化するこ
とである。 The single fiber fineness of the ultrafine fibers obtained as described above is 0.5 denier or less, but it is particularly preferable that
0.2 denier or less. This is because the effect of ultrafine fibers is likely to be greatly exhibited at such ultrafine fineness. In some cases, ultrafine fibers can be made into sheets by continuous fibers, but a preferred method is to cut the fibers into sheets with a length of 1 to 5 mm.
次に本発明の極細繊維紙は、極細短繊維に対し
て20重量％以下３重量％以上の熱水可溶性ポリビ
ニルアルコール短繊維を含有し、該ポリビニルア
ルコール短繊維が部分的に溶融して極細短繊維同
志を仮装着して構成され乾燥時の経方向の強度が
50Kg／cm／ｇ／cm2以上で、且つ湿潤したときに60
秒以内に強度が乾燥時の1/5以下に低下すること
を特徴とする。乾燥時の強力は本発明の極細繊維
紙を用いて加工を行なうとき加工性に問題のない
強力として経方向強度50Kg／cm／ｇ／cm2以上であ
る。緯方向強度は、一般には経方向強度より低い
が加工上問題になることは少ないので、特に規制
する必要はない。次に本発明の極細繊維紙は、湿
潤した時、60秒以内に強度が乾燥時の1/5以下に
低下する必要があるが、これは、たとえば本発明
の極細繊維紙を基布と積層し、高圧噴射水流処理
を行ない基布と一体化せしめる際に不可欠の特性
である。すなわち、高圧噴射水流処理をほどこす
時、極細繊維紙の極細単繊維同志が高度に接着し
紙が高い湿潤強力を示すときは、高圧噴射水流処
理が満足に行なわれない。しかも、高圧噴射水流
処理を連続的に実施するためには、予かじめ極細
繊維紙を水のシヤワー等によつて湿潤処理を行な
い、単繊維間の結合をゆるめておく必要がある。
この際湿潤による結合の弛緩は急激におこる必要
があり、60秒以内に強度が乾燥時の1/5以下、望
ましくは1/10以下に低下する必要がある。このよ
うな特性は、乾燥時には極細繊維間の強固な結合
作用を有し、湿潤時には容易に結合が弛緩するよ
うなバインダーによつて、繊維が接着されている
必要がある。極細繊維の場合、水素結合等により
自己接着の性質を示す場合もあるが、合成重合体
の場合一般には自己接着のみでは、乾燥時の強力
が不十分である。本発明の極細繊維紙において
は、極細繊維に対して20重量％以下３重量％以上
の熱水可溶性ポリビニルアルコール短繊維を含有
し、該ポリビニルアルコール短繊維が部分的に溶
融して極細短繊維同志を仮接着していることが必
要である。この場合熱水可溶性ポリビニルアルコ
ール短繊維の含有量が上記範囲内であつても該短
繊維を完全に溶融して極細繊維同志を強固に接着
せしめると、紙は湿潤により強力低下するが、そ
の低下はあまりにもゆるやかで本発明の目的を達
成することができない。 Next, the ultrafine fiber paper of the present invention contains hot water-soluble polyvinyl alcohol short fibers in an amount of 20% to 3% by weight based on the ultrafine short fibers, and the polyvinyl alcohol short fibers are partially melted to form the ultrafine short fibers. It is constructed by temporarily attaching fibers together, and the strength in the warp direction when dry is
50Kg/cm/g/ cm2 or more and 60 when wet
It is characterized by its strength decreasing to less than 1/5 of its dry strength within seconds. The dry strength is 50 Kg/cm/g/cm 2 or more in the warp direction, which is a strength that does not cause problems in processability when the ultrafine fiber paper of the present invention is used for processing. Although the strength in the weft direction is generally lower than the strength in the warp direction, it does not need to be particularly regulated because it rarely causes problems in processing. Next, when the ultrafine fiber paper of the present invention is wetted, the strength must decrease to 1/5 or less of the dry strength within 60 seconds. This is an essential characteristic when performing high-pressure water jet treatment to integrate it with the base fabric. That is, when high-pressure water jet treatment is applied, if the microfibers of the microfiber paper are highly bonded to each other and the paper exhibits high wet strength, the high-pressure water jet treatment will not be carried out satisfactorily. Moreover, in order to carry out the high-pressure water jet treatment continuously, it is necessary to wet the microfiber paper in advance by showering with water or the like to loosen the bonds between the single fibers.
In this case, the loosening of the bond due to wetting must occur rapidly, and the strength must decrease to 1/5 or less, preferably 1/10 or less, of the dry strength within 60 seconds. Such properties require that the fibers be bonded together by a binder that has a strong binding effect between the ultrafine fibers when dry and easily loosens the bond when wet. In the case of ultrafine fibers, they may exhibit self-adhesive properties due to hydrogen bonding, etc., but in the case of synthetic polymers, self-adhesion alone is generally insufficient in strength when dry. The ultrafine fiber paper of the present invention contains hot water-soluble polyvinyl alcohol short fibers in an amount of 20% to 3% by weight based on the ultrafine fibers, and the polyvinyl alcohol short fibers are partially melted and the ultrafine short fibers are bonded together. It is necessary to temporarily adhere the In this case, even if the content of hot water-soluble polyvinyl alcohol short fibers is within the above range, if the short fibers are completely melted and the ultrafine fibers are firmly adhered to each other, the strength of the paper will decrease due to wetness, but the is too loose and cannot achieve the purpose of the present invention.
熱水可溶性ポリビニルアルコール短繊維として
は、市販のものが使用できる。通常は溶解温度75
℃以下のものを用い、部分的に溶解した状態を出
現させるが、場合によつては溶解温度75℃〜100
℃のものを採用し、ごく１部のみ溶解した状態を
使うことも出来る。 As the hot water soluble polyvinyl alcohol short fibers, commercially available ones can be used. Usually melting temperature 75
℃ or lower to create a partially dissolved state, but in some cases, the melting temperature is 75℃ to 100℃.
It is also possible to use one with only a small portion dissolved.
次に本発明の製法について説明すると、本発明
の製法の第１の要件は平均単繊維繊度が0.5デニ
ールで、単繊維繊度の変動係数が20％以下である
極細繊維を用いることであるが、これについては
前述の通りである。 Next, to explain the manufacturing method of the present invention, the first requirement of the manufacturing method of the present invention is to use ultrafine fibers with an average single fiber fineness of 0.5 denier and a coefficient of variation of single fiber fineness of 20% or less. This is as described above.
紡糸延伸された極細繊維は、必要に応じ緩和処
理等を施された後１〜５mm程度の長さに切断す
る。切断した極細短繊維は水に分散し、抄紙機に
より抄造する。この際通常は繊維を水に分散して
叩解し、分散を向上することが望ましい。叩解お
よび抄造は普通紙及び湿式不織布の製造に用いら
れる装置を使用することが出来る。また場合によ
つては、紡糸延伸繊維を未乾燥のまま切断、分散
すると、分散性が良好である。抄造の際は、バイ
ンダーとして、熱水可溶性ポリビニルアルコール
短繊維を用い、添加量は極細繊維に対して３〜20
重量％、特に望ましくは３〜10重量％である。添
加量が多過ぎると、湿潤時の急激な強力低下が不
十分となる。ポリビニルアルコール短繊維は、通
常の１デニール〜３デニール程度のもので差支え
ない。 The spun and drawn ultrafine fibers are subjected to relaxation treatment, etc., if necessary, and then cut into lengths of about 1 to 5 mm. The cut ultrafine short fibers are dispersed in water and made into paper using a paper machine. At this time, it is usually desirable to disperse the fibers in water and beat them to improve dispersion. For beating and papermaking, equipment used for producing plain paper and wet-laid nonwoven fabrics can be used. In some cases, if the spun and drawn fibers are cut and dispersed in an undried state, good dispersibility can be achieved. During papermaking, hot water-soluble polyvinyl alcohol short fibers are used as a binder, and the amount added is 3 to 20% of the ultrafine fibers.
% by weight, particularly preferably from 3 to 10% by weight. If the amount added is too large, the rapid strength reduction during wet conditions will be insufficient. The polyvinyl alcohol short fibers may be ordinary ones of about 1 denier to 3 denier.
次に、本発明の方法で重要なのは熱水可溶性ポ
リビニルアルコールを含んだ抄上げシートの乾燥
である。通常の抄紙においては、バインダーの効
果を十分に発揮し、乾燥した紙の強力を高めるた
め、熱水可溶性ポリビニルアルコール繊維が実質
的に完全に溶融するような乾燥条件が採用され
る。ところが、本発明の目的とする極細繊維紙を
製造するためには、熱水可溶性ポリビニルアルコ
ール繊維が、実質的に完全に溶融するような乾燥
方法は採用出来ない。すなわち、バインダーの添
加量を減少しても、バインダーが完全に溶融して
いる場合は、湿潤時の急激な強力低下および以後
の高圧水流噴射処理において好ましい結果が得ら
れない。したがつて抄上げシートをポリビニルア
ルコール短繊維が部分的に溶融する温度で乾燥す
ることが本発明の第２の重要な要件である。 Next, what is important in the method of the present invention is drying the paper sheet containing hot water-soluble polyvinyl alcohol. In normal papermaking, drying conditions are adopted such that the hot water-soluble polyvinyl alcohol fibers are substantially completely melted in order to fully exhibit the effect of the binder and increase the strength of the dried paper. However, in order to produce the ultrafine fiber paper that is the object of the present invention, it is not possible to employ a drying method that substantially completely melts the hot water-soluble polyvinyl alcohol fibers. That is, even if the amount of binder added is reduced, if the binder is completely melted, there will be a sudden drop in strength during wetting and favorable results will not be obtained in the subsequent high-pressure water jet treatment. Therefore, the second important requirement of the present invention is to dry the paper sheet at a temperature at which the short polyvinyl alcohol fibers partially melt.
通常の抄紙において、たとえばヤンキー式乾燥
機を用いるとき、乾燥温度は130℃程度とするの
が普通であるが、本発明の場合、120℃以下とす
るのが望ましく、特に望ましいのは100℃以下で
ある。 In normal paper making, for example, when using a Yankee dryer, the drying temperature is usually around 130°C, but in the case of the present invention, it is preferably 120°C or lower, and particularly preferably 100°C or lower. It is.
また、シリンダーロール乾燥機等を用いる場
合、乾燥温度を低温から高温へ段階的に上昇せし
めることも、本発明の方法にとつて有効である。
たとえば第１、第２シリンダーを40〜50℃、第
３、第４シリンダーを60℃〜80℃、さらに最終ド
ライヤーを90℃〜100℃とすることにより、シー
トに亀裂などが入ることなく安定に本発明の目的
とする極細繊維紙を製造することができる。 Furthermore, when using a cylinder roll dryer or the like, it is also effective for the method of the present invention to increase the drying temperature stepwise from a low temperature to a high temperature.
For example, by setting the first and second cylinders to 40 to 50 degrees Celsius, the third and fourth cylinders to 60 to 80 degrees Celsius, and the final dryer to 90 to 100 degrees Celsius, the sheet can be stabilized without cracking. The ultrafine fiber paper that is the object of the present invention can be produced.
熱水可溶性ポリビニルアルコール短繊維の添加
量が多い場合には、抄上げシートの乾燥温度は特
に低目とする必要がある。 When the amount of hot water-soluble polyvinyl alcohol short fibers added is large, the drying temperature of the paper sheet needs to be particularly low.
本発明は、湿式紡糸による延伸され、均一な極
細繊維を衣料用、人工皮革用、産業資材用等の広
汎な用途に工業的に極めて有利に応用することを
可能にしたもので、その意義は大きい。 The present invention makes it possible to industrially and extremely advantageously apply uniform ultrafine fibers drawn by wet spinning to a wide range of uses such as clothing, artificial leather, and industrial materials. big.
以下実施例により、本発明をさらに具体的に説
明する。 The present invention will be explained in more detail below with reference to Examples.
実施例 １
アクリロニトリル92重量％、アクリル酸メチル
８重量％からなる極限粘度1.7（25℃のジメチル
ホルムアミド中で測定）の重合体をジメチルアセ
トアミドに溶解して17重量％の原液を調製した。
これを過し、ジメチルアセトアミド35重量％、
温度50℃の水溶液中に、孔径30μ、孔数50000の
紡糸口金を用いて紡糸し、凝固糸を90℃の熱水中
で４倍に延伸し乾燥した。引き続き170℃乾燥で
1.5倍延伸した。次いで1.8Kg／cm2の加圧水蒸気中
で緩和したところ平均単繊維繊度0.11デニール、
単繊維繊度の変動係数2.7％、平均単繊維繊度3.0
ｇ／ｄ、平均単繊維伸度26％の極細繊維が得られ
た。この極細繊維を４mmに切断し、水中で叩解後
極細繊維に対して９％の熱水可溶性ポリビニルア
ルコール短繊維（株式会社クラレ製VPB
Type243）を加え、両者を水に均一に分散せし
め、円網式抄紙機を用いて常法により、目付30
ｇ／m2の紙を抄造した。次いで抄き上げシートを
85℃のヤンキー式乾燥機で乾燥し、均一な極細繊
維紙を得た。得られた極細繊維紙は経強度170
Kg／cm／ｇ／cm2、緯強度60Kg／cm／ｇ／cm2であつ
た。次にこのシートを引張り試験機のチヤツクに
はさんだ状態で20℃の水中に60秒間浸漬後引張り
試験を行なつたところ、経強度は４Kg／cm／ｇ／
cm2、すなわち乾燥時の約1/43に低下した。Example 1 A polymer having an intrinsic viscosity of 1.7 (measured in dimethylformamide at 25°C) consisting of 92% by weight of acrylonitrile and 8% by weight of methyl acrylate was dissolved in dimethylacetamide to prepare a 17% by weight stock solution.
After this, 35% by weight of dimethylacetamide,
Spinning was carried out in an aqueous solution at a temperature of 50°C using a spinneret with a pore diameter of 30 μm and a number of holes of 50,000, and the coagulated thread was stretched 4 times in hot water at 90°C and dried. Continue drying at 170℃
Stretched 1.5 times. Then, when it was relaxed in pressurized steam of 1.8Kg/ cm2 , the average single fiber fineness was 0.11 denier.
Coefficient of variation of single fiber fineness 2.7%, average single fiber fineness 3.0
Ultrafine fibers with g/d and average single fiber elongation of 26% were obtained. This ultra-fine fiber was cut into 4 mm pieces, and after beating in water, 9% hot water-soluble polyvinyl alcohol short fiber (VPB manufactured by Kuraray Co., Ltd.) was added to the ultra-fine fiber.
Type 243), uniformly disperse both in water, and use a circular mesh paper machine in the usual manner to
g/m 2 paper was made. Next, make a paper sheet
It was dried in a Yankee dryer at 85°C to obtain uniform ultrafine fiber paper. The resulting microfiber paper has a warp strength of 170
Kg/cm/g/cm 2 , and the latitudinal strength was 60 Kg/cm/g/cm 2 . Next, this sheet was placed between the chucks of a tensile testing machine and immersed in water at 20°C for 60 seconds, and then subjected to a tensile test.The tensile strength was 4 kg/cm/g/
cm 2 , that is, about 1/43 of the dry value.
またシートを顕微鏡で観察したところ、ポリビ
ニルアルコール短繊維は一部のみ溶融し、なお繊
維状を保つているのが観察された。 Further, when the sheet was observed under a microscope, it was observed that only a portion of the short polyvinyl alcohol fibers were melted and the sheet remained fibrous.
実施例 ２
実施例１と同様にして得られたアクリル極細繊
維を３mmに切断し、水中で叩解後、極細繊維に対
して７％の熱水可溶性ポリビニルアルコール短繊
維（株式会社クラレ製VPB Type243）を加え、
均一に水に分散後円網式抄紙機で常法により35
ｇ／m2の紙を抄造した。次いで抄き上げシートを
70℃のヤンキー式乾燥機で乾燥し、得られた極細
繊維紙の乾燥時の経強度は150Kg／cm／ｇ／cm2、
湿潤60秒後の経強度は６Kg／cm／ｇ／cm2であつ
た。この極細繊維紙をポリエステルトリコツト編
地に積層し、孔径0.15mmのノズルから30Kg／cm2の
高圧水流を噴射したところ、極細繊維は編地と完
全に一体化し、外観の均一な複合シートが得られ
た。又このときポリビニルアルコールバインダー
は大部分除去され、わずかに残存しているのみで
あるのが認められた。次いでシートをサーキユラ
ー染色機で染色したところ、表面が均一に起毛さ
れて衣料用人工皮革として有用なシートとなつ
た。Example 2 The acrylic ultrafine fibers obtained in the same manner as in Example 1 were cut into 3 mm pieces, and after beating in water, hot water-soluble polyvinyl alcohol short fibers (VPB Type 243 manufactured by Kuraray Co., Ltd.) were added to the ultrafine fibers at a concentration of 7%. Add
After uniformly dispersing in water, 35% by conventional method on a cylinder paper machine.
g/m 2 paper was made. Next, make a paper sheet
Dry in a Yankee dryer at 70°C, and the resulting ultrafine fiber paper has a dry strength of 150 kg/cm/g/cm 2 .
The mechanical strength after 60 seconds of wetting was 6 kg/cm/g/cm 2 . When this ultrafine fiber paper was laminated on a polyester tricot knitted fabric and a high-pressure water jet of 30 kg/cm 2 was sprayed from a nozzle with a hole diameter of 0.15 mm, the ultrafine fibers were completely integrated with the knitted fabric, creating a composite sheet with a uniform appearance. Obtained. Moreover, at this time, it was observed that most of the polyvinyl alcohol binder was removed and only a small amount remained. When the sheet was then dyed using a circular dyeing machine, the surface was evenly raised and the sheet was useful as artificial leather for clothing.
比較例 １
抄き上げシートの乾燥温度を130℃とした以外
は実施例２と同様にして極細繊維紙を製造した。
この紙の乾燥時の経強度は240Kg／cm／ｇ／cm2、
湿潤60秒後の経強度は65Kg／cm／ｇ／cm2であつ
た。この極細繊維紙を実施例２と同様にしてポリ
エステルトリコツト編地と積層し、高圧噴射水流
処理を施したところ、極細繊維と編地の一体化は
不均一であり、サーキユラー染色機で染色したと
ころ極細繊維が部分的に脱落し、実用にならなか
つた。Comparative Example 1 Ultrafine fiber paper was produced in the same manner as in Example 2 except that the drying temperature of the paper sheet was 130°C.
The dry strength of this paper is 240Kg/cm/g/cm 2 ,
The mechanical strength after 60 seconds of wetting was 65 Kg/cm/g/cm 2 . When this ultrafine fiber paper was laminated with a polyester tricot knitted fabric in the same manner as in Example 2 and subjected to high-pressure water jet treatment, the integration of the ultrafine fibers and the knitted fabric was uneven, and dyeing was performed using a circular dyeing machine. However, some of the ultrafine fibers fell off, making it unusable.
実施例 ３
実施例１と同様の極細繊維に、極細繊維に対し
て９％の熱水可溶性ポリビニルアルコール短繊維
（株式会社クラレ製VPB Type243）を加え、均一
に水に分散後、傾斜短網式抄紙機で40ｇ／m2の紙
を抄造し、シリンダー乾燥機で乾燥した。第１ド
ライヤーの第１、第２シリンダー温度を50℃、第
３、第４シリンダー温度を70℃、第２ドライヤー
のシリンダー温度85℃で乾燥した。得られた極細
繊維紙は均一で良好な外観を示し、乾燥経強度
180Kg／cm／ｇ／cm2、60秒湿潤後の経強度４Kg／
cm／ｇ／cm2で強力は1/45に低下した。Example 3 Hot water-soluble polyvinyl alcohol short fibers (VPB Type 243 manufactured by Kuraray Co., Ltd.) were added to the same ultrafine fibers as in Example 1, and 9% of the ultrafine fibers were added, and after uniformly dispersing in water, they were mixed using an inclined short screen method. Paper of 40 g/m 2 was made using a paper machine and dried using a cylinder dryer. Drying was carried out at a temperature of the first and second cylinders of the first dryer of 50°C, a temperature of the third and fourth cylinders of 70°C, and a cylinder temperature of 85°C of the second dryer. The obtained microfiber paper has a uniform and good appearance, and has a low dry strength.
180Kg/cm/g/cm 2 , mechanical strength after 60 seconds of moistening 4Kg/
The strength decreased to 1/45 at cm/g/cm 2 .
Claims (1)
て得られた平均単繊維繊度が0.5デニール以下
で、単繊維繊度の変動係数が20％以下である極細
短繊維を主体として極細短繊維に対して20重量％
以下３重量％以上の熱水可溶性ポリビニルアルコ
ール短繊維を含有し、該ポリビニルアルコール短
繊維が部分的に溶融して極細短繊維同志を仮接着
して構成され、乾燥時の経方向の強度が50Kg／
cm／ｇ／cm2以上で、且つ湿潤したときに、60秒以
内に前記強度が乾燥時の1/5以下に低下すること
を特徴とする極細繊維紙。 ２ 繊維形成性合成重合体を湿式紡糸し、延伸し
て得られた平均単繊維繊度が0.5デニール以下
で、単繊維繊度の変動係数が20％以下の極細短繊
維を、該極細短繊維に対して20重量％以下３重量
％以上の熱水可溶性ポリビニルアルコール短繊維
とともに抄造し、次いでポリビニルアルコール短
繊維が部分的に溶融する温度で乾燥することを特
徴とする極細繊維紙の製法。 ３ 乾燥温度を低温から高温へ段階的に上昇せし
める特許請求の範囲第２項記載の極細繊維紙の製
法。[Scope of Claims] 1 Ultrafine short fibers obtained by wet spinning and drawing a fiber-forming synthetic polymer and having an average single fiber fineness of 0.5 denier or less and a coefficient of variation of single fiber fineness of 20% or less. Mainly 20% by weight based on ultra-fine short fibers
Contains 3% by weight or more of hot water soluble polyvinyl alcohol short fibers, and is constructed by partially melting the polyvinyl alcohol short fibers and temporarily bonding the ultrafine short fibers together, and has a warp strength of 50 kg when dry. /
cm/g/cm 2 or more and the strength is reduced to 1/5 or less of dry strength within 60 seconds when wet. 2 Wet-spun and stretched a fiber-forming synthetic polymer to obtain ultrafine short fibers with an average single fiber fineness of 0.5 denier or less and a coefficient of variation of single fiber fineness of 20% or less, for the ultrafine short fibers. 1. A method for producing ultrafine fiber paper, which comprises paper-making with hot water-soluble polyvinyl alcohol short fibers of 20% by weight or more and 3% by weight or more, and then drying at a temperature at which the polyvinyl alcohol short fibers partially melt. 3. The method for producing ultrafine fiber paper according to claim 2, wherein the drying temperature is increased stepwise from a low temperature to a high temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5517378A JPS54147203A (en) | 1978-05-10 | 1978-05-10 | Microfine fiber paper and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5517378A JPS54147203A (en) | 1978-05-10 | 1978-05-10 | Microfine fiber paper and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54147203A JPS54147203A (en) | 1979-11-17 |
| JPS6246679B2 true JPS6246679B2 (en) | 1987-10-03 |
Family
ID=12991329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5517378A Granted JPS54147203A (en) | 1978-05-10 | 1978-05-10 | Microfine fiber paper and method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54147203A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6378082U (en) * | 1986-11-06 | 1988-05-24 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0043555A1 (en) * | 1980-07-07 | 1982-01-13 | Teijin Limited | Paper-like polyester fiber sheet and process for producing the same |
-
1978
- 1978-05-10 JP JP5517378A patent/JPS54147203A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6378082U (en) * | 1986-11-06 | 1988-05-24 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54147203A (en) | 1979-11-17 |
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