JP2644802B2 - Method of manufacturing sanitary sheet - Google Patents
Method of manufacturing sanitary sheetInfo
- Publication number
- JP2644802B2 JP2644802B2 JP63033357A JP3335788A JP2644802B2 JP 2644802 B2 JP2644802 B2 JP 2644802B2 JP 63033357 A JP63033357 A JP 63033357A JP 3335788 A JP3335788 A JP 3335788A JP 2644802 B2 JP2644802 B2 JP 2644802B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- sheet
- alkaline solution
- 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 - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000000835 fiber Substances 0.000 claims description 70
- 239000012670 alkaline solution Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 10
- 125000002057 carboxymethyl group Chemical class [H]OC(=O)C([H])([H])[*] 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000006467 substitution reaction Methods 0.000 claims description 7
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 4
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 4
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 229920000297 Rayon Polymers 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000002964 rayon Substances 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Absorbent Articles And Supports Therefor (AREA)
- Nonwoven Fabrics (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、衛生用シートの製造方法に関し、さらに詳
しくは、水洗便器へアルカリ溶液とともに流下処理する
ことが可能な衛生用シートの製造方法に関し、得られる
衛生用シートは、使い捨てオムツ・生理用ナプキンの表
面材、オムツの表面に敷くいわゆるライナー、ペット用
シーツなどの使用に供するものである。Description: TECHNICAL FIELD The present invention relates to a method for producing a sanitary sheet, and more particularly, to a method for producing a sanitary sheet that can be flowed down to a flush toilet together with an alkaline solution. The resulting sanitary sheet is used for disposable diapers / sanitary napkins, so-called liners spread on the surface of diapers, pet sheets, and the like.
（従来の技術とその課題） 従来、水洗便器へアルカリ溶液とともに流下して分散
させることが可能な衛生用シートとして、レイヨン／パ
ルプ等の繊維をアルカリ可溶性樹脂（バインダー）で結
合したものが、特開昭49−112742号公報に開示されてい
る。(Conventional technology and its problems) Conventionally, as a sanitary sheet that can flow down along with an alkaline solution into a flush toilet and disperse it, a sheet in which fibers such as rayon / pulp are bonded with an alkali-soluble resin (binder) is a special feature. It is disclosed in JP-A-49-112742.
前記従来技術によれば、繊維自体は溶解しないので、
シートを構成する繊維量によっては、水洗便器の排水管
を詰まらせることがある。したがって、こうした課題を
解決した衛生用シートが望まれている。According to the prior art, the fibers themselves do not dissolve,
Depending on the amount of fibers constituting the sheet, the drain pipe of the flush toilet may be clogged. Therefore, a sanitary sheet that solves these problems is desired.
本発明の目的は、少なくとも特定量以上の構成繊維に
はアルカリ溶液に可溶性である繊維を用いることによ
り、前記課題を解決することができる衛生用シートの製
造方法を提供することにある。An object of the present invention is to provide a method for manufacturing a sanitary sheet that can solve the above-mentioned problem by using fibers that are soluble in an alkaline solution for at least a specific amount of constituent fibers.
（課題を解決するための手段） 本発明に係る衛生用シートの製造方法では、前記目的
を達成するため、カルボキシメチル基の置換度0.25〜0.
4のカルボキシメチルセルロースであってアルカリ溶液
に可溶性である繊維30重量％以上と、繊維長100mm以下
であって前記アルカリ溶液に不可溶性である繊維70重量
％以下との混合物をウォーターニードリング法によって
シート状にする。(Means for Solving the Problems) In the method for producing a sanitary sheet according to the present invention, in order to achieve the above object, the degree of substitution of the carboxymethyl group is 0.25 to 0.2.
A mixture of 30% by weight or more of fibers which are carboxymethyl cellulose of 4 and soluble in an alkaline solution and 70% by weight or less of fibers having a fiber length of 100 mm or less and insoluble in said alkaline solution is subjected to a water needling method to form a sheet. Shape.
前記アルカリ溶液に可溶性である繊維としては、カル
ボキシメチルレイヨン、カルボキシメチルコットン、カ
ルボキシメチルパルプを用いる。本発明の目的を達成す
るためには、前記アルカリ溶液に可溶性である繊維は、
少なくとも30重量％を用いることを不可欠とする。この
繊維（以下、第１の繊維という）は、100重量％用いて
もよいし、かつ、30重量％以上、100重量％以下用い、
その他はアルカリ溶液に不可溶性である第２の繊維を用
いてもよい。Carboxymethyl rayon, carboxymethyl cotton, and carboxymethyl pulp are used as the fibers that are soluble in the alkaline solution. In order to achieve the object of the present invention, the fibers that are soluble in the alkaline solution,
It is essential to use at least 30% by weight. This fiber (hereinafter, referred to as a first fiber) may be used in an amount of 100% by weight, and used in an amount of 30% by weight or more and 100% by weight or less,
Alternatively, a second fiber that is insoluble in an alkaline solution may be used.
第２の繊維を用いる場合には、その繊維としては、ポ
リエステル、ポリプロピレン、レイヨン、ポリエステル
−ポリプロピレンの複合、ポリエステル−ポリエチレン
の複合の各繊維の単独または組み合せを挙げることがで
きる。When the second fiber is used, examples of the fiber include polyester, polypropylene, rayon, polyester-polypropylene composite, and polyester-polyethylene composite fiber alone or in combination.
第１の繊維が30重量％未満であると、この場合は、そ
の他の重量％が第２の繊維として用いてあるが、アルカ
リ溶液に溶解する第１の繊維の割合が少なく、その結
果、第１の繊維が溶解しても、衛生用シートを構成する
第２の繊維の充分な分散がえられない。ちなみに、第１
の繊維を30重量％以上用いる限り、そして、衛生用シー
トの、たとえば、排泄液によるいわゆる「ベタツキ」を
少なくするという観点からする限り、適宜量の第２の繊
維を用いることが好ましい。When the first fiber is less than 30% by weight, the other fiber is used as the second fiber in this case, but the proportion of the first fiber dissolved in the alkaline solution is small, and as a result, Even if one fiber dissolves, sufficient dispersion of the second fiber constituting the sanitary sheet cannot be obtained. By the way, the first
It is preferable to use an appropriate amount of the second fiber as long as the fiber is used in an amount of 30% by weight or more, and from the viewpoint of reducing the so-called "stickiness" due to the excretion of the sanitary sheet.
第１の繊維がアルカリ溶液に可溶性であるためには、
そのカルボキシメチル基の置換度が0.25〜0.4であるこ
とが不可欠である。この置換度が0.25未満であると、ア
ルカリ溶液に不溶解であり、0.4超であると、湿潤強度
が低下するので、衛生用シートとして使用に供したと
き、使用中に破損が生じる。In order for the first fiber to be soluble in the alkaline solution,
It is essential that the degree of substitution of the carboxymethyl group is from 0.25 to 0.4. When the degree of substitution is less than 0.25, it is insoluble in an alkaline solution, and when it exceeds 0.4, the wet strength is reduced, so that when used as a sanitary sheet, breakage occurs during use.
第２の繊維を混用した場合の衛生用シートは、第１の
繊維が溶解し、その結果、第２の繊維が分散する必要が
あるが、その分散性をよくして本発明の目的を達成する
ためには、第２の繊維の繊維長は100mm以下であること
が必要であり、一般的には、約30〜60mmのものを用い
る。繊維長が100mm超であると、繊維が互いに絡んで該
繊維の分散性を悪くするからである。この点で、第１の
繊維は溶解するので、繊維長にはとくに制約がない。第
１および第２の繊維の繊度もとくに制約がないが、一般
的には、約１〜10dのものを用いる。In the sanitary sheet in which the second fiber is mixed, the first fiber dissolves, and as a result, the second fiber needs to be dispersed, but the dispersibility is improved to achieve the object of the present invention. To do so, the fiber length of the second fiber needs to be 100 mm or less, and generally a fiber length of about 30 to 60 mm is used. If the fiber length is more than 100 mm, the fibers are entangled with each other and deteriorate the dispersibility of the fibers. At this point, since the first fiber is dissolved, there is no particular restriction on the fiber length. The fineness of the first and second fibers is not particularly limited, but generally, about 1 to 10d is used.
衛生用シートは、ウォーターニードリング（水流交
絡）法によって製造するのがよい。これによって得た衛
生用シートは、その構成繊維が交絡するだけで、すなわ
ち、繊維結合材（剤）や繊維融着によることなく、その
シート形態が保たれるので、風合い、感触に優れ、肌を
刺激することがないからである。The sanitary sheet is preferably manufactured by a water needling method. The hygienic sheet obtained by this method is excellent in texture and feel because the sheet form is maintained only by the entanglement of the constituent fibers, that is, without the fiber binder (agent) or fiber fusion. Because it does not stimulate.
アルカリ溶液は、とくに制約されないが、水酸化ナト
リウム、アンモニア、ケイ酸ナトリウム塩の水溶液を挙
げることができる。The alkaline solution is not particularly limited, and examples thereof include an aqueous solution of sodium hydroxide, ammonia, and sodium silicate.
（実施例） 実施例１ 本実施例は、衛生用シートを構成する前記第１の繊維
が30重量％以上である必要を示す。前記第１の繊維とし
て、カルボキシメチル基の置換度0.3、繊度3d、繊維長5
1mmのカルボキシレイヨン繊維を、かつ、前記第２の繊
維として、繊度2d、繊維長44mmのポリエステル繊維と、
繊度2d、繊維長44mmのレイヨン繊維を混用してウエブを
形成し、これをウォーターニードリング法によって処理
して目付28g/m2のシートをえた。(Example) Example 1 This example shows that the amount of the first fibers constituting the sanitary sheet is 30% by weight or more. As the first fiber, the substitution degree of carboxymethyl group is 0.3, the fineness is 3d, and the fiber length is 5
1 mm carboxy rayon fiber, and, as the second fiber, a 2d fineness, a polyester fiber having a fiber length of 44 mm,
A rayon fiber having a fineness of 2d and a fiber length of 44 mm was mixed to form a web, which was treated by a water needling method to obtain a sheet having a basis weight of 28 g / m 2 .
得られたシートの湿潤強度、アルカリ水溶液での分散
性を、つぎの方法で測定した。The wet strength and dispersibility in an aqueous alkaline solution of the obtained sheet were measured by the following methods.
湿潤強度 横200mm、縦150mmのサンプルを生理食塩水に漬けたの
ち、該サンプルの中央部に200gの重りを載せ、該サンプ
ルの対向側辺を両手で持ち上げたとき、該サンプルが該
重りにより破れるか否かを観察した。Wet strength A 200-mm-wide, 150-mm-long sample is immersed in physiological saline, and a 200-g weight is placed on the center of the sample. When the opposite side of the sample is lifted with both hands, the sample is broken by the weight. Was observed.
下表中、○印は、破れなかったもの、×印は、破れた
ものを、それぞれ示す。In the table below, the mark ○ indicates that the piece was not broken, and the mark X indicates that the piece was broken.
アルカリ水溶液での分散性0.1Nの水酸化ナトリウム溶
液を内径8.2cmの円筒容器に1.51とり、前記サンプルを1
g入れて蓋をした。該容器で反転（１サイクル２秒）を
繰り返えし行い、前記第１および第２の繊維が均一に分
散するまでの往復回数を側った。1.51 of a 0.1N sodium hydroxide solution dispersible in an alkaline aqueous solution is placed in a cylindrical container having an inner diameter of 8.2 cm, and the sample is placed in a container.
g and put on the lid. Inversion (1 cycle 2 seconds) was repeated in the container, and the number of reciprocations until the first and second fibers were uniformly dispersed was controlled.
下表中、○印は、分散するまでの回数が10回以下であ
ったもの、×印は分散するまでの回数が10回以上であっ
たものを、それぞれ示す。In the table below, the mark ○ indicates that the number of times until dispersion was 10 or less, and the mark x indicates that the number of times until dispersion was 10 or more, respectively.
実施例２ 本実施例は、衛生用シートを構成する前記第１の繊維
のカルボキシメチル基の置換度が0.25〜0.4である必要
を示す。 Example 2 This example shows that the degree of carboxymethyl group substitution of the first fibers constituting the sanitary sheet needs to be 0.25 to 0.4.
前記第１の繊維として、繊度1d、繊維長44mmのカルボ
キシレイヨン繊維を、かつ、前記第２の繊維として、繊
度1.5d、繊維長44mmのポリエステル−ポリエチレン複合
繊維および繊度1.5d、繊維長44mmのポリエステル繊維を
混用してウエブを形成し、これを温度140℃で処理して
目付25g/m2のシートを得た。As the first fiber, a carboxy rayon fiber having a fineness of 1 d and a fiber length of 44 mm, and as the second fiber, a polyester-polyethylene composite fiber having a fineness of 1.5 d and a fiber length of 44 mm and a fineness of 1.5 d and a fiber length of 44 mm are used. A web was formed by mixing polyester fibers, and the web was treated at a temperature of 140 ° C. to obtain a sheet having a basis weight of 25 g / m 2 .
得られたシートの湿潤強度、アルカリ水溶液での分散
性を、実施例１と同じ方法で測定した。The wet strength and dispersibility in an aqueous alkaline solution of the obtained sheet were measured in the same manner as in Example 1.
（発明の効果） 本発明に係る衛生用シートの製造方法によれば、この
シートは、カルボキシメチル基の置換度0.25〜0.4のカ
ルボキシメチルセルロースであるアルカリ溶液に可溶性
である繊維30重量％以上から構成してあるので、アルカ
リ溶液とともに水洗便器へ投棄し溶解して流下すること
ができる。 (Effect of the Invention) According to the method for producing a sanitary sheet according to the present invention, this sheet is composed of 30% by weight or more of fibers that are soluble in an alkaline solution that is a carboxymethyl cellulose having a degree of carboxymethyl group substitution of 0.25 to 0.4. Therefore, it can be dumped together with the alkaline solution into the flush toilet, dissolved and flowed down.
また、アルカリ溶液に不溶解性である他の繊維を70重
量％まで混合して衛生用シートの「ベタツキ」を少なく
することができるが、この場合でも、しかも、ウォータ
ーニードリング法による場合でも、アルカリ溶液に可溶
である繊維がアルカリ溶液に溶解し、その結果、他の繊
維を分散させ、便器の排水管を詰まらせることがない。
ちなみに、ウォーターニードリング法によって得られた
シートは繊維が複雑に交絡するので、アルカリ溶液に可
溶性である繊維が30重量％未満であると、換言すると、
アルカリ溶液に不溶解性である他の繊維が70重量％超で
あると、該他の繊維の分散がきわめて悪い。In addition, it is possible to reduce the "stickiness" of the sanitary sheet by mixing up to 70% by weight of other fibers that are insoluble in the alkaline solution, but even in this case, and even by the water needling method, Fibers that are soluble in the alkaline solution dissolve in the alkaline solution, thereby dispersing other fibers and not clogging the toilet drain.
By the way, the sheet obtained by the water needling method has a complicated entanglement of the fibers, so that the fiber soluble in the alkaline solution is less than 30% by weight, in other words,
If the other fiber insoluble in the alkaline solution exceeds 70% by weight, the dispersion of the other fiber is extremely poor.
また、カルボキシメチルセルロースは水不溶性である
から、それをシート化するのに水を使用するウォーター
ニードリング法を使用しても、なんら問題がない。In addition, since carboxymethylcellulose is insoluble in water, there is no problem even if a water needling method using water is used to make it into a sheet.
Claims (1)
カルボキシメチルセルロースであってアルカリ溶液に可
溶性である繊維30重量％以上と、繊維長100mm以下であ
って前記アルカリ溶液に不可溶性である繊維70重量％以
下との混合物をウォーターニードリング法によってシー
ト状にすることを特徴とする衛生用シートの製造方法。1. A carboxymethyl cellulose having a degree of substitution of carboxymethyl group of 0.25 to 0.4 and a fiber soluble in an alkaline solution of 30% by weight or more, and a fiber length of 100 mm or less and a fiber 70 insoluble in the alkaline solution. A method for producing a hygienic sheet, characterized in that a mixture with a weight percent of less than or equal to% by weight is formed into a sheet by a water needling method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63033357A JP2644802B2 (en) | 1988-02-16 | 1988-02-16 | Method of manufacturing sanitary sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63033357A JP2644802B2 (en) | 1988-02-16 | 1988-02-16 | Method of manufacturing sanitary sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01207457A JPH01207457A (en) | 1989-08-21 |
| JP2644802B2 true JP2644802B2 (en) | 1997-08-25 |
Family
ID=12384333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63033357A Expired - Lifetime JP2644802B2 (en) | 1988-02-16 | 1988-02-16 | Method of manufacturing sanitary sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2644802B2 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3780357A (en) * | 1973-02-16 | 1973-12-18 | Hewlett Packard Co | Electroluminescent semiconductor display apparatus and method of fabricating the same |
| JPS5966598A (en) * | 1982-10-04 | 1984-04-16 | 王子製紙株式会社 | Easily releasable paper having moisture-proof and waterproofproperty |
| JPS6060101A (en) * | 1983-09-14 | 1985-04-06 | Asahi Chem Ind Co Ltd | Formation of carboxyalkyl ether derivative |
| JPS622918A (en) * | 1985-06-28 | 1987-01-08 | 株式会社黒松コーポレーション | Sheet like high grade absorbable material |
| JPS6175864A (en) * | 1985-07-19 | 1986-04-18 | 旭化成株式会社 | Absorbable nonwoven fabric |
-
1988
- 1988-02-16 JP JP63033357A patent/JP2644802B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01207457A (en) | 1989-08-21 |
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