JPH0447078B2 - - Google Patents
Info
- Publication number
- JPH0447078B2 JPH0447078B2 JP10173589A JP10173589A JPH0447078B2 JP H0447078 B2 JPH0447078 B2 JP H0447078B2 JP 10173589 A JP10173589 A JP 10173589A JP 10173589 A JP10173589 A JP 10173589A JP H0447078 B2 JPH0447078 B2 JP H0447078B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- gel
- coating film
- fibers
- weight
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 239000000835 fiber Substances 0.000 claims description 21
- 239000011347 resin Substances 0.000 claims description 18
- 229920005989 resin Polymers 0.000 claims description 18
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 230000002745 absorbent Effects 0.000 claims description 5
- 239000002250 absorbent Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 description 6
- 239000011521 glass Substances 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920002785 Croscarmellose sodium Polymers 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 108010009736 Protein Hydrolysates Proteins 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Paper (AREA)
Description
〔産業上の利用分野〕
本発明は、従来の抄造法では均一に分散させて
紙層化することが困難であつた繊維を用いて繊維
質シートを製造する方法に関する。
〔従来の技術〕
従来シート状の繊維製品の製造方法としては、
湿式の抄造法が広く用いられている。例えば、紙
を製造する場合、繊維を水中に均一に分散させ、
これを網でこして網上に紙層を形成させ、乾燥し
て製造している。
この方法においては、繊維が水中に均一に分散
すること及び紙層形成時に繊維が均一に配列する
ことが必要である。しかし、疎水性繊維、大アス
ペクト比の繊維、高比重繊維、比重差の大きい混
合繊維等を用いる場合、水中に均一に分散させた
り、低秤量の紙層を形成して繊維質シートを得る
ことは困難である。
また、スパンボンド、メルトブロー、レジンボ
ンド等の乾式の不織布の製法によるシート状繊維
製品の製造方法もあるが、その製法からみて、特
性の異なる繊維の複合繊維質シートを得ることは
困難である。
〔発明が解決しようとする課題〕
本発明は、前記事情に基づいてなされたもの
で、その目的とするところは、従来抄造法では抄
造が困難であつた水中に均一に分散しにくい繊維
を用いて、均一紙層を形成し、低秤量の均一繊維
質シートを製造する方法を提供することにある。
〔課題を解決するための手段〕
本発明者らは、前記課題を解決するために鋭意
研究を重ねた結果、高吸水性樹脂と繊維と水とを
混合して得られるゲル状混合物を用いて塗膜を形
成することにより、前記課題が達成されることを
見出し、この知見に基づいて本発明を完成するに
至つた。
すなわち、本発明は水と該水に対して0.5〜５
重量％の繊維と該水に対して0.5〜２重量％の高
吸水性樹脂とを混合して得られるゲル状混合物を
用いて多孔コンベア上に塗膜を形成し、次いで塗
膜から水と高吸水性樹脂からなるゲル状樹脂を多
孔コンベア下面からのサクシヨンにより除去した
後、これを乾燥することを特徴とする繊維質シー
トの製造方法を提供するものである。
本発明において用いられる高吸水性樹脂として
は、水を自重の50〜1000倍吸収するものであつ
て、水を吸収し、繊維と混合したときに粘性が自
由に制御できるものであれば特に制限はなく、高
吸水性樹脂として市販されている各種の高分子化
合物が用いられる。
具体的には、デンプン・アクリル酸塩のグラフ
ト共重合体などのデンプン系、カルボキシメチル
セルロース架橋体などのセルロース系、ビニルア
ルコール・アクリル酸塩共重合体、ポリアクリロ
ニトリル加水分解物、架橋ポリアクリル酸塩、変
性ポリビニルアルコール、イソシアネート系樹脂
などの合成ポリマー系のものが好ましく用いられ
る。
これらのうち、例えば、KIゲルとしてクラレ
(株)から市販されている高吸水性樹脂の吸水倍率と
粘性との関係は次のようである。
[Industrial Application Field] The present invention relates to a method for producing a fibrous sheet using fibers that are difficult to uniformly disperse and form into paper layers using conventional papermaking methods. [Prior art] Conventional methods for producing sheet-like textile products include:
Wet papermaking methods are widely used. For example, when manufacturing paper, fibers are uniformly dispersed in water,
It is manufactured by straining it through a mesh to form a paper layer on the mesh and drying it. This method requires that the fibers be uniformly dispersed in the water and that the fibers be uniformly arranged during the formation of the paper layer. However, when using hydrophobic fibers, fibers with a large aspect ratio, fibers with high specific gravity, mixed fibers with a large difference in specific gravity, etc., it is difficult to obtain a fibrous sheet by uniformly dispersing them in water or forming a paper layer with a low basis weight. It is difficult. There are also methods for manufacturing sheet-like fiber products using dry nonwoven fabric manufacturing methods such as spunbond, melt blow, and resin bond, but considering these manufacturing methods, it is difficult to obtain composite fibrous sheets made of fibers with different characteristics. [Problems to be Solved by the Invention] The present invention has been made based on the above-mentioned circumstances, and its purpose is to use fibers that are difficult to uniformly disperse in water, which have been difficult to make using conventional papermaking methods. The object of the present invention is to provide a method for forming a uniform paper layer and producing a uniform fibrous sheet with a low basis weight. [Means for Solving the Problems] As a result of extensive research in order to solve the above problems, the present inventors have developed a solution using a gel-like mixture obtained by mixing a super absorbent resin, fibers, and water. It has been discovered that the above-mentioned object can be achieved by forming a coating film, and based on this knowledge, the present invention has been completed. That is, the present invention provides water with a concentration of 0.5 to 5
A coating film is formed on a porous conveyor using a gel-like mixture obtained by mixing 0.5 to 2% by weight of superabsorbent resin with respect to the water, and then water and superabsorbent resin are mixed from the coating film. The present invention provides a method for producing a fibrous sheet, characterized in that a gel-like resin made of a water-absorbing resin is removed by suction from the lower surface of a porous conveyor and then dried. The superabsorbent resin used in the present invention is particularly limited as long as it absorbs water 50 to 1000 times its own weight, and its viscosity can be freely controlled when it absorbs water and is mixed with fibers. Instead, various polymer compounds commercially available as super absorbent resins are used. Specifically, starch-based products such as starch-acrylate graft copolymers, cellulose-based products such as cross-linked carboxymethyl cellulose, vinyl alcohol-acrylate copolymers, polyacrylonitrile hydrolysates, and cross-linked polyacrylates Synthetic polymers such as , modified polyvinyl alcohol, and isocyanate resins are preferably used. Among these, for example, Kuraray's KI gel
The relationship between the water absorption capacity and viscosity of the super absorbent resin commercially available from Co., Ltd. is as follows.
以下、本発明を実施例に基づいて詳細に説明す
るが、本発明はこれに限定されるものではない。
実施例 １
第１図は本発明の繊維質シートを製造するため
の装置の一例を示す模式的断面図である。この装
置を用いて以下の操作を行つた。
水１、ガラスチヨツプドストランド（径
5μm、長さ６mm）16ｇ及びイソシアネート系高吸
水性樹脂（クラレ(株)製、KIゲル）10ｇの配合比
の原料を、ニーダー１にて20〜30分間混合してゲ
ル状混合物を得た。次にこのゲル状混合物を多孔
ベルトコンベア２の上にホツパー３から供給し、
コンベア上にロールコーター４を用いて640ｇ／
m2になるようにコートして塗膜を形成した。次に
これにウオーターシヤワー５を用いて水を吹き付
け、粘性の調整し、繊維の配列をランダムにし
た。次にこれをサクシヨンボツクス６を用いて吸
引し、ゲル状樹脂を除去した。ついでブロアー７
で塗膜とコンベアーを離型し、乾燥機８で250℃
で乾燥したのち巻き取り機９に巻き取つた。
得られた繊維質シートは厚み100μmで、10ｇ／
m2に均一に分散されていた。
実施例 ２
実施例１の配合比において、繊維としてガラス
チヨツプドストランド16ｇに代えて、ラスタン
（旭化成工業(株)製、炭素繊維、長さ６mm）16ｇを
用いたほかは実施例１と同様にして繊維質シート
を得た。
得られた繊維質シートは厚み120μmで、10ｇ／
m2に均一に分散されていた。
実施例 ３
実施例１の配合比において、繊維としてガラス
チヨツプドストランド16ｇに代えて、ラスタン
（旭化成工業(株)製、炭素繊維、長さ６mm）８ｇと
実施例１で用いたガラスチヨツプドストランド８
ｇを用いたほかは実施例１と同様にして繊維質シ
ートを得た。
得られた繊維質シートは厚み110μmで、10ｇ／
m2に均一に分散されていた。
〔発明の効果〕
本発明により、従来抄造することが困難であつ
た水中に均一に分散しにくい繊維や、低秤量での
均一紙層を形成しにくい繊維を用いて、均一で低
秤量の繊維質シートを製造することが可能となつ
た。
Hereinafter, the present invention will be explained in detail based on Examples, but the present invention is not limited thereto. Example 1 FIG. 1 is a schematic cross-sectional view showing an example of an apparatus for manufacturing a fibrous sheet of the present invention. The following operations were performed using this device. 1 water, glass chopped strands (diameter
5 μm, length 6 mm) and 10 g of isocyanate superabsorbent resin (Kuraray Co., Ltd., KI gel) were mixed in a kneader 1 for 20 to 30 minutes to obtain a gel-like mixture. Next, this gel-like mixture is supplied onto the porous belt conveyor 2 from the hopper 3,
640g/ on the conveyor using roll coater 4
A coating film was formed by coating the sample to a thickness of m 2 . Next, water was sprayed onto this using a water shower 5 to adjust the viscosity and randomize the fiber arrangement. Next, this was suctioned using suction box 6 to remove the gel-like resin. Then blower 7
The coating film and conveyor are released from the mold, and the dryer is heated to 250°C in dryer 8.
After drying it, it was wound up on a winding machine 9. The obtained fibrous sheet has a thickness of 100 μm and a weight of 10 g/
was evenly distributed over m 2 . Example 2 Same as Example 1 except that 16 g of Rustan (manufactured by Asahi Kasei Industries, Ltd., carbon fiber, length 6 mm) was used instead of 16 g of glass chopped strands at the blending ratio of Example 1. A fibrous sheet was obtained in the same manner. The obtained fibrous sheet has a thickness of 120μm and a weight of 10g/
was evenly distributed over m 2 . Example 3 In the blending ratio of Example 1, instead of 16 g of glass chopped strands as fibers, 8 g of Rustan (manufactured by Asahi Kasei Corporation, carbon fiber, length 6 mm) and glass chopped strands used in Example 1 were used. Tupdo strand 8
A fibrous sheet was obtained in the same manner as in Example 1 except that g was used. The obtained fibrous sheet has a thickness of 110 μm and a weight of 10 g/
was evenly distributed over m 2 . [Effects of the Invention] The present invention makes it possible to produce uniform, low-weight fibers by using fibers that are difficult to disperse uniformly in water and fibers that are difficult to form a uniform paper layer at low weights, which were conventionally difficult to form. It became possible to produce quality sheets.
第１図は本発明の繊維質シートを製造するため
の装置の一例を示す模式的断面図である。
符号の説明、１…ニーダー、２…多孔ベルトコ
ンベア、３…ホツパー、４…ロールコーター、５
…ウオーターシヤワー、６…サクシヨンボツク
ス、７…ブロアー、８…乾燥機、９…巻き取り
機。
FIG. 1 is a schematic cross-sectional view showing an example of an apparatus for manufacturing a fibrous sheet of the present invention. Explanation of symbols, 1...kneader, 2...porous belt conveyor, 3...hopper, 4...roll coater, 5
...water shower, 6. suction box, 7. blower, 8. dryer, 9. winder.
Claims (1)
水に対して0.5〜２重量％の高吸水性樹脂とを混
合して得られるゲル状混合物を用いて多孔コンベ
ア上に塗膜を形成し、次いで塗膜から水と高吸水
性樹脂からなるゲル状樹脂を多孔コンベア下面か
らのサクシヨンにより除去した後、これを乾燥す
ることを特徴とする繊維質シートの製造方法。 ２ 水と該水に対して0.5〜５重量％の繊維と該
水に対して0.5〜２重量％の高吸水性樹脂とを混
合して得られるゲル状混合物を用いて多孔コンベ
ア上に塗膜を形成し、次いでウオーターシヤワー
を用いて塗膜繊維配列を調整し、次いで塗膜から
水と高吸水性樹脂からなるゲル状樹脂を多孔コン
ベア下面からのサクシヨンにより除去した後、こ
れを乾燥することを特徴とする繊維質シートの製
造方法。[Claims] 1. Using a gel-like mixture obtained by mixing water, 0.5 to 5% by weight of fibers based on the water, and 0.5 to 2% by weight of superabsorbent resin based on the water. A fibrous sheet characterized in that a coating film is formed on a porous conveyor, and then a gel-like resin consisting of water and a super absorbent resin is removed from the coating film by suction from the bottom surface of the porous conveyor, and then this is dried. Production method. 2. A coating film is applied on a porous conveyor using a gel-like mixture obtained by mixing water, 0.5 to 5% by weight of fibers based on the water, and 0.5 to 2% by weight of superabsorbent resin based on the water. , then adjust the coating film fiber arrangement using a water shower, then remove water and a gel-like resin consisting of a super absorbent resin from the coating film by suction from the bottom surface of the porous conveyor, and then dry this. A method for producing a fibrous sheet characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10173589A JPH02289197A (en) | 1989-04-24 | 1989-04-24 | Production of fibrous sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10173589A JPH02289197A (en) | 1989-04-24 | 1989-04-24 | Production of fibrous sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02289197A JPH02289197A (en) | 1990-11-29 |
| JPH0447078B2 true JPH0447078B2 (en) | 1992-07-31 |
Family
ID=14308514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10173589A Granted JPH02289197A (en) | 1989-04-24 | 1989-04-24 | Production of fibrous sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02289197A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100574547B1 (en) * | 2003-03-21 | 2006-04-27 | 율촌화학 주식회사 | Biodegradable composition having improved water resistance and method for producing same |
-
1989
- 1989-04-24 JP JP10173589A patent/JPH02289197A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02289197A (en) | 1990-11-29 |
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