JP3150587B2 - Water disintegration sheet manufacturing method - Google Patents

Water disintegration sheet manufacturing method

Info

Publication number
JP3150587B2
JP3150587B2 JP28548095A JP28548095A JP3150587B2 JP 3150587 B2 JP3150587 B2 JP 3150587B2 JP 28548095 A JP28548095 A JP 28548095A JP 28548095 A JP28548095 A JP 28548095A JP 3150587 B2 JP3150587 B2 JP 3150587B2
Authority
JP
Japan
Prior art keywords
water
sheet
salt
wet
carboxymethylcellulose
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 - Lifetime
Application number
JP28548095A
Other languages
Japanese (ja)
Other versions
JPH09132897A (en
Inventor
直人 竹内
昌徳 物部
俊之 奥田
俊哉 大久保
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Uni Charm Corp
Original Assignee
Uni Charm Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to JP28548095A priority Critical patent/JP3150587B2/en
Application filed by Uni Charm Corp filed Critical Uni Charm Corp
Priority to CA002208759A priority patent/CA2208759C/en
Priority to MYPI9604567 priority patent/MY125612A/en
Priority to PCT/JP1996/003213 priority patent/WO1997016597A1/en
Priority to CN96191731A priority patent/CN1084415C/en
Priority to KR1019970704561A priority patent/KR100235789B1/en
Priority to EP96935528A priority patent/EP0802282A1/en
Priority to TW85114165A priority patent/TW306943B/zh
Publication of JPH09132897A publication Critical patent/JPH09132897A/en
Application granted granted Critical
Publication of JP3150587B2 publication Critical patent/JP3150587B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Landscapes

  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Paper (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】この発明は、水に対して分散また
は溶解する水解性のシート状物に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-disintegrable sheet which disperses or dissolves in water.

【0002】[0002]

【従来の技術】従来、ウエットワイプスは周知である。
また、水洗トイレ等の水中に投ずると分散または溶解し
てそのまま流し去ることが可能なウエットワイプスに代
表される水分散性または水解性のシート状物も周知であ
る。ここでいう水分散性と水解性とは同義であって、そ
のような性質を有するウエットワイプスには、湿潤状態
で使用するときの高い強度と、大量の水の中へ投じたと
きの速やかな分散性とが求められる。これら強度と分散
性とを両立させるために、特開平1−168999号公
報では水不溶性のカルボキシメチルセルロースのナトリ
ウム/カルシウム塩、または、カルボキシメチルセルロ
ースのナトリウム塩を使用している。特公昭48−27
605号公報には、水不溶性カルボキシメチルセルロー
スを使用して抄造した湿紙にアルカリ金属水溶液をスプ
レーする製紙方法が開示されている。特開平3−167
400号公報では、水不溶性カルボキシメチルセルロー
スのアルカリ金属塩を紙料に混合して抄造している。ま
た、特開平5−25792号公報では、紙料にカルボキ
シメチルセルロースのアルカリ金属塩を混合して抄造し
た紙に多価金属イオンを含有する含水有機溶媒を含浸さ
せている。
2. Description of the Related Art Conventionally, wet wipes are well known.
In addition, water-dispersible or water-disintegrable sheet materials represented by wet wipes, which can be dispersed or dissolved and thrown away as they are thrown into water such as flush toilets, are well known. The water dispersibility and water disintegration referred to here are synonymous, and wet wipes having such properties have high strength when used in a wet state, and quickness when thrown into a large amount of water. High dispersibility is required. JP-A-1-168999 uses a sodium / calcium salt of water-insoluble carboxymethylcellulose or a sodium salt of carboxymethylcellulose in order to achieve both the strength and the dispersibility. 48-27
No. 605 discloses a papermaking method in which an aqueous alkali metal solution is sprayed on wet paper made using water-insoluble carboxymethylcellulose. JP-A-3-167
In Japanese Patent Publication No. 400, paper is formed by mixing an alkali metal salt of water-insoluble carboxymethyl cellulose with a stock. In JP-A-5-25792, a paper made by mixing an alkali metal salt of carboxymethyl cellulose with a stock is impregnated with a water-containing organic solvent containing a polyvalent metal ion.

【0003】[0003]

【発明が解決しようとする課題】前記従来技術において
バインダーとして使用されるカルボキシメチルセルロー
スとその塩は、一般に置換度(D.S.)、pHが高く
なるに伴い水不溶性から膨潤性へと変化し、さらに水溶
性となる。これらカルボキシメチルセルロースやその塩
をバインダーにしてシートを抄造する場合に、バインダ
ーの膨潤性が高ければ繊維との均一な混合が難しくな
り、また水溶性であれば抄造したシートに対する付着量
が少量でバインダーの使用量に見合うほどシートの強度
が向上しないということがある。また、抄造したシート
に後からバインダーをスプレーで付着させる工程では、
CMCの膨潤性が高いと、その水溶液の粘度が高くな
り、均一なスプレーが難しくなる。
The carboxymethylcellulose and its salt used as a binder in the prior art generally change from water-insoluble to swellable as the degree of substitution (DS) and pH increase. , And become more water-soluble. When a sheet is formed using these carboxymethylcellulose or a salt thereof as a binder, uniform mixing with the fiber becomes difficult if the binder has a high swelling property. In some cases, the strength of the sheet does not improve as much as the amount used. Also, in the step of spraying the binder to the sheet formed later by spraying,
When the swellability of CMC is high, the viscosity of the aqueous solution becomes high, and uniform spraying becomes difficult.

【0004】この発明では、ウエットワイプス等として
使用可能な水解シートの製造方法において、所要量のカ
ルボキシメチルセルロースおよび/またはその塩を効率
よくシートに付着させることを課題にしている。
An object of the present invention is to provide a method for producing a hydrolyzed sheet usable as wet wipes or the like, in which a required amount of carboxymethylcellulose and / or a salt thereof is efficiently attached to the sheet.

【0005】[0005]

【課題を解決するための手段】この発明は、前記課題を
解決するために、水分散性繊維と置換度=0.30〜
0.60およびpH≧5.0を有する水膨潤性ないし水
不溶性カルボキシメチルセルロースおよび/またはその
塩とを水中に混合分散して紙料を用意し、前記紙料をシ
ートに形成し、得られた湿シートに、炭酸ナトリウムを
含有する水溶液をスプレーして含ませ、しかる後、該湿
シートを乾燥する水解シートの製造方法を前提とする。
In order to solve the above-mentioned problems, the present invention provides a water-dispersible fiber having a degree of substitution of 0.30 to 0.30.
Water swellable or water having 0.60 and pH ≧ 5.0
Insoluble carboxymethylcellulose and / or
Salt is mixed and dispersed in water to prepare a stock, and the stock is
And the resulting wet sheet is coated with sodium carbonate.
Spray the aqueous solution containing it, and then
A method for manufacturing a hydrolyzed sheet for drying a sheet is assumed.

【0006】かかる前提において、この発明が特徴とす
るところは、前記炭酸ナトリウムの重量が前記カルボキ
シメチルセルロースおよび/またはその塩の2.4〜8
%であることにある。
[0006] On this assumption, the present invention is characterized.
Where the weight of the sodium carbonate is
2.4-8 of cimethylcellulose and / or its salt
%.

【0007】[0007]

【実施例】この発明に係る製造方法において使用する原
料には、カルボキシメチルセルロースおよび/またはそ
の塩とともにシート化することが可能な水分散性繊維が
含まれる。その繊維には、パルプ繊維を使用することが
好ましいが、それに限らずリネン,ウール等の天然繊維
やレーヨン繊維等の再生繊維、アセテート等の半合成繊
維、ナイロン,ポリエステル等の合成繊維を使用するこ
ともできる。これら繊維に対して、D.S.=0.30
〜0.60,pH≧5.0を有する低い水膨潤性ないし
水不溶性のカルボキシメチルセルロースおよび/または
その塩をバインダーとして使用する。かかるバインダー
を高い水膨潤性ないし水溶性のものに変化させるために
炭酸ナトリウムを添加する。これら繊維とバインダーと
の混合物をシート化する手段として、周知の抄紙技術、
湿式不織布製造技術、ウォタージェットを利用する不織
布製造技術等を利用することができる。この発明をさら
に詳細に説明すると、以下のとおりである。
EXAMPLES The raw materials used in the production method according to the present invention include water-dispersible fibers that can be formed into a sheet together with carboxymethylcellulose and / or a salt thereof. It is preferable to use pulp fibers as the fibers, but not limited thereto. Natural fibers such as linen and wool, regenerated fibers such as rayon fibers, semi-synthetic fibers such as acetate, and synthetic fibers such as nylon and polyester are used. You can also. For these fibers, S. = 0.30
Low water swellable or water insoluble carboxymethylcellulose having a pH of 0.60.60 and a pH ≧ 5.0 and / or a salt thereof are used as binder. In order to change such a binder to a highly water-swellable or water-soluble binder
Add sodium carbonate . As means for forming a sheet of the mixture of these fibers and a binder, a well-known papermaking technique,
A wet nonwoven fabric manufacturing technology, a nonwoven fabric manufacturing technology using a water jet, or the like can be used. The present invention will be described in more detail as follows.

【0008】実施例1および2 製紙用針葉樹パルプ(NBKP)とカルボキシメチルセ
ルロースおよび/またはその塩とを水道水に混合、分散
した液を原料として小型試験抄造機で抄造し、得られた
湿シートにカルボキシメチルセルロースおよび/または
その塩の2.4〜8重量%に相当する炭酸ナトリウムを
含有する水溶液を湿シート乾燥重量の2.5倍量だけス
プレーで含浸させた。その後、回転ドラム型乾燥機を使
用して110°Cで90秒間乾燥し、坪量40g/m
の乾燥したシートを得た。ウエットワイプス用薬液とし
てプロピレングリコール/塩化カルシウム/イオン交換
水=30/0.5/69.5(重量比)の混合液をこの
シートにその重量の2.5倍量だけスプレーで含浸さ
せ、さらに20°Cで24時間静置して、ウエットワイ
プスを得た。このウエットワイプスについて、下記条件
による水分散性と湿潤引張強度とを評価し、抄造過程で
の諸条件がそれらに与える影響を確認した。実施例と比
較例との関係は、表1および下記のとおりである。 (1)実施例1と比較例1 カルボキシメチルセルロースおよび/またはその塩の乾
燥重量に対する炭酸ナトリウムの添加量(重量%)の影
響を示す。 (2)実施例2と比較例2 カルボキシメチルセルロースおよび/またはその塩の置
換度(D.S.)とpHの影響を示す。
Examples 1 and 2 Papermaking softwood pulp (NBKP) and carboxymethylcellulose and / or a salt thereof were mixed and dispersed in tap water using a small test paper machine as a raw material. An aqueous solution containing sodium carbonate in an amount of 2.4 to 8% by weight of carboxymethylcellulose and / or a salt thereof was impregnated with a spray by 2.5 times the wet sheet dry weight. Then, it is dried at 110 ° C. for 90 seconds using a rotary drum type dryer, and has a basis weight of 40 g / m 2.
Was obtained. A mixture of propylene glycol / calcium chloride / ion-exchanged water = 30 / 0.5 / 69.5 (weight ratio) was spray impregnated on the sheet as a liquid solution for wet wipes by 2.5 times the weight of the sheet. It was further allowed to stand at 20 ° C. for 24 hours to obtain a wet wipe. The wet wipes were evaluated for water dispersibility and wet tensile strength under the following conditions, and the effects of various conditions in the papermaking process on them were confirmed. The relationship between Examples and Comparative Examples is as shown in Table 1 and below. (1) Example 1 and Comparative Example 1 The effect of the amount of sodium carbonate added (% by weight) on the dry weight of carboxymethylcellulose and / or its salt is shown. (2) Example 2 and Comparative Example 2 The effect of carboxymethylcellulose and / or its salt on the degree of substitution (DS) and pH is shown.

【0009】水分散性の評価 10cm×10cmのウエットワイプス試片をイオン交
換水300mlを入れた300mlガラスビーカーに投
入してマグネチックスタラーで撹拌(回転数600rp
m)し、ウエットワイプスの分散状態を経時的に観察し
た。観察結果は次のように評価した。 A: 試片が100秒以内に細分化する。 C: 試片が200秒以内では細分化しない。
[0009]Evaluation of water dispersibility  Ion exchange 10cm x 10cm wet wipes specimen
Throw it into a 300 ml glass beaker containing 300 ml of water
And stirred with a magnetic stirrer (at 600 rpm)
m) and observe the dispersion state of the wet wipes over time.
Was. The observation results were evaluated as follows. A: The specimen is subdivided within 100 seconds. C: The specimen does not subdivide within 200 seconds.

【0010】湿潤引張強度の評価 幅25mm×長さ150mmのウエットワイプス試片を
チャック間隔100mm、引張速度100mm/min
で引っ張ったときの破断強度を測定した。破断強度が少
なくとも300gあれば、ウエットワイプスは実用上強
度不足になることがなかった。
[0010]Evaluation of wet tensile strength  Wet wipes with a width of 25 mm and a length of 150 mm
Chuck interval 100mm, pulling speed 100mm / min
The tensile strength at the time of pulling was measured. Low breaking strength
If at least 300g, wet wipes are practically strong
There was no shortage.

【0011】実施例と比較例の評価結果は、表1のとお
りである。
Table 1 shows the evaluation results of the examples and comparative examples.

【0012】[0012]

【表1】 [Table 1]

【0013】[0013]

【発明の効果】この発明に係る水解シートの製造方法に
おいては、低い膨潤性または水不溶性のカルボキシメチ
ルセルロースおよび/またはその塩をバインダーとして
水分散性繊維と混合するから、得られるシートに所要量
のバインダーを付着させることが容易である。かかるバ
インダーは、シートに対して湿潤状態で添加した炭酸ナ
トリウムによって水膨潤性ないし水溶性となり、ウエッ
トワイプスの湿潤強度を向上させ、かつ、大量の水の中
へ投入したときには速やかに溶解し、前記水解シートの
分散を可能にする。
In the method for producing a hydrolyzable sheet according to the present invention, a low swelling or water-insoluble carboxymethylcellulose and / or a salt thereof is mixed with a water-dispersible fiber as a binder. It is easy to attach a binder. Such a binder is a carbonic acid added in a wet state to the sheet.
Thorium becomes water-swellable or water-soluble, improves the wet strength of the wet wipes, and dissolves quickly when poured into a large amount of water, enabling dispersion of the hydrolyzed sheet.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 大久保 俊哉 静岡県掛川市亀の甲2丁目5番2号− 312 (56)参考文献 特開 平6−192991(JP,A) 特開 平3−167400(JP,A) 特開 平7−90795(JP,A) 特開 平1−168999(JP,A) 特公 昭48−27605(JP,B1) (58)調査した分野(Int.Cl.7,DB名) D21H 11/00 - 27/42 A47K 7/00 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshiya Okubo 2-5-2-3-2, Kameno-ko, Kakegawa-shi, Shizuoka Prefecture (56) References JP-A-6-192991 (JP, A) JP-A-3-167400 ( JP, A) JP-A-7-90795 (JP, A) JP-A-1-168999 (JP, A) JP-B-48-27605 (JP, B1) (58) Fields investigated (Int. Cl. 7 , DB name) D21H 11/00-27/42 A47K 7/00

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】水分散性繊維と置換度=0.30〜0.6
0およびpH≧5.0を有する水膨潤性ないし水不溶性
カルボキシメチルセルロースおよび/またはその塩とを
水中に混合分散して紙料を用意し、前記紙料をシートに
形成し、得られた湿シートに、炭酸ナトリウムを含有す
る水溶液をスプレーして含ませ、しかる後、該湿シート
を乾燥する水解シートの製造方法において、前記炭酸ナトリウムの重量が前記カルボキシメチルセル
ロースおよび/またはその塩の2.4〜8%であること
を特徴とする前記製造方法。
1. A water-dispersible fiber and a degree of substitution = 0.30 to 0.6.
Water-swellable or water-insoluble having pH of 0 and pH ≧ 5.0
Carboxymethylcellulose and / or a salt thereof
Prepare a stock by mixing and dispersing in water, and apply the stock to a sheet.
The formed wet sheet contains sodium carbonate.
Spraying an aqueous solution, followed by the wet sheet
A method for producing a hydrolyzed sheet, comprising drying the sodium carboxymethyl cell
2.4-8% of loin and / or its salt
The above-mentioned manufacturing method characterized by the above-mentioned.
【請求項2】前記水解シートにウエットワイプス用薬液
を含浸させる工程が含まれる請求項1記載の製造方法。
2. The method according to claim 1, further comprising the step of impregnating said wet sheet with a chemical solution for wet wipes.
JP28548095A 1995-11-02 1995-11-02 Water disintegration sheet manufacturing method Expired - Lifetime JP3150587B2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP28548095A JP3150587B2 (en) 1995-11-02 1995-11-02 Water disintegration sheet manufacturing method
MYPI9604567 MY125612A (en) 1995-11-02 1996-11-01 Process for manufacturing a water-disintegrable sheet.
PCT/JP1996/003213 WO1997016597A1 (en) 1995-11-02 1996-11-01 Process for preparing hydrolyzable sheet
CN96191731A CN1084415C (en) 1995-11-02 1996-11-01 Process for preparing hydrolyzable sheet
CA002208759A CA2208759C (en) 1995-11-02 1996-11-01 Process for manufacturing a water-disintegrable sheet
KR1019970704561A KR100235789B1 (en) 1995-11-02 1996-11-01 Process for manufacturing a water-disintegrable sheet
EP96935528A EP0802282A1 (en) 1995-11-02 1996-11-01 Process for preparing hydrolyzable sheet
TW85114165A TW306943B (en) 1995-11-02 1996-11-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28548095A JP3150587B2 (en) 1995-11-02 1995-11-02 Water disintegration sheet manufacturing method

Publications (2)

Publication Number Publication Date
JPH09132897A JPH09132897A (en) 1997-05-20
JP3150587B2 true JP3150587B2 (en) 2001-03-26

Family

ID=17692070

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28548095A Expired - Lifetime JP3150587B2 (en) 1995-11-02 1995-11-02 Water disintegration sheet manufacturing method

Country Status (1)

Country Link
JP (1) JP3150587B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3865506B2 (en) * 1997-09-08 2007-01-10 ユニ・チャーム株式会社 Water-decomposable fiber sheet containing fibers with different fiber lengths
JP3566044B2 (en) 1997-09-24 2004-09-15 ユニ・チャーム株式会社 Water-disintegrable fiber sheet and wiping sheet on which it is stacked
JP2001098489A (en) * 1999-09-30 2001-04-10 Uni Charm Corp Water-disintegrable fibrous sheet containing water- insoluble carboxymethyl cellulose
JP3703661B2 (en) 1999-10-05 2005-10-05 ユニ・チャーム株式会社 Water-decomposable fiber sheet containing gel compound

Also Published As

Publication number Publication date
JPH09132897A (en) 1997-05-20

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