JP4932412B2 - Tissue paper - Google Patents

Description

  The present invention relates to thin paper.

Soft paper is required for thin paper such as toilet paper and tissue.
Therefore, conventionally, the usability is improved by devising a papermaking method. For example, a method of creping (wrinkled) the surface of thin paper has been proposed. However, this method has a problem that the surface fuzz remains rough. Therefore, a method of smoothing by calendar processing (for example, Patent Document 1) has been proposed. However, there is a problem in that a decrease in paper volume due to creping is unavoidable and the overall soft feeling is impaired.
As a technique for avoiding such drawbacks, a method has been attempted in which thin paper produced by a normal method is treated with a thin paper treating agent that improves the texture.
For example, a technique for suppressing fuzz by applying a hydrophilic component such as glycerin or saccharide is widely known. However, the method of applying a hydrophilic component such as glycerin or saccharide gives a moist feeling and softness and reduces the rough feeling, but has a drawback that the sticky feeling becomes stronger.
Therefore, in recent years, for example, a method using a mineral oil such as paraffin (for example, Patent Document 2) and a method using animal and vegetable oils (for example, Patent Document 3) in combination with a hydrophilic component and a lipophilic compound, smoothness can be achieved. Proposals have been made to reduce the sticky feeling.
Furthermore, a method has been proposed in which a texture such as softness, smoothness and moist feeling can be further improved by using a third component such as an amphoteric surfactant or an amine compound in combination (for example, Patent Document 4).
Japanese Patent Laid-Open No. 5-76464 (Claims, Examples, etc.) JP-A-5-156596 (Claims, Examples, etc.) JP-A-7-82662 (Claims, Examples, etc.) JP-A-9-296389 (Claims, Examples, etc.)

However, in the thin paper processed with the conventional thin paper processing agent, further improvement in texture is desired.
In addition, in the conventional thin paper treatment agent, it is desired to improve the stability over time.
For example, the manufacture of a thin paper treating agent and the processing of the thin paper are not performed at once. That is, the thin paper treating agent is usually transferred after production and stored in a warehouse. Therefore, it is required to ensure stability over time in consideration of such temperature conditions such as transfer and storage.

  Therefore, an object of the present invention is to provide a technique capable of improving the texture of the thin paper with respect to the thin paper treated with the thin paper treating agent.

The present invention proposes the following means in order to solve the above problems.
The first invention includes (A) one or more compounds selected from the group consisting of an alkylene oxide adduct of lanolin and an alkylene oxide adduct of castor oil, (B) a polyhydric alcohol, and (C) a surfactant. However, the component (B) relates to a thin paper treated with a thin paper treating agent characterized by containing glycerin, propylene glycol and sorbitol .
The second invention is characterized in that, in the thin paper of the first invention, the component (C) is a thin paper treating agent containing an anionic surfactant.

  In the present invention, a technique capable of improving the texture of the thin paper can be provided for the thin paper treated with the thin paper treating agent.

[Thin paper treatment agent]
The thin paper treating agent used in the present invention comprises (A) one or more compounds selected from the group consisting of an alkylene oxide adduct of lanolin and an alkylene oxide adduct of castor oil, (B) a polyhydric alcohol, and (C ) A surfactant [however, the compound corresponding to the component (A) is excluded].
The thin paper treatment agent is usually applied to the thin paper as it is, but it is a secondary treatment agent diluted to an appropriate concentration with water (preferably ion-exchanged water), and this is used to treat the thin paper. In some cases.

(A) One or more compounds selected from the group consisting of alkylene oxide adducts of lanolin and alkylene oxide adducts of castor oil In the present invention, “lanolin” refers to lanolin that has not undergone treatment such as hydrogenation (hereinafter “ It may be referred to as “untreated lanolin”) and so-called “reduced lanolin” obtained by hydrogenating lanolin. In the following, “lanolin” shall refer to this generic concept unless otherwise stated.
Lanolin has a hydroxyl group, and an alkylene oxide adduct of lanolin (hereinafter, “alkylene oxide adduct” may be abbreviated as “AO adduct”) is a compound in which an alkylene oxide is added to the hydroxyl group. is there. Alkylene oxide is usually bonded to lanolin in the state that two or more are added. Therefore, the AO adduct is also called a polyalkylene oxide adduct.
In the alkylene oxide, the alkylene group preferably has about 2 to 4 carbon atoms, preferably ethylene oxide or propylene oxide, and particularly preferably ethylene oxide.
The addition amount of alkylene oxide is preferably in the range of 0.1 to 15 parts by mass, more preferably 0.5 to 10 parts by mass per 1 part by mass of lanolin. By setting it to the lower limit value or more, it is possible to prevent the lipophilicity from becoming too strong and lowering the liquid stability.

In the present invention, “castor oil” includes castor oil that has not been subjected to treatment such as hydrogenation (hereinafter sometimes referred to as “untreated castor oil”) and so-called “hardened castor oil” that is hydrogenated to castor oil. . In the following, “castor oil” shall indicate this comprehensive concept unless otherwise specified.
Castor oil has a hydroxyl group like lanolin, and the AO adduct of castor oil is a compound in which an alkylene oxide is added to the hydroxyl group. Alkylene oxide is usually bonded to castor oil with two or more added.
The alkylene group of the alkylene oxide has about 2 to 4 carbon atoms, preferably ethylene oxide or propylene oxide, and particularly preferably ethylene oxide. The number of added moles of alkylene oxide is preferably in the range of 5 to 100, particularly preferably 10 to 60, per mole of castor oil.

Specific examples of the component (A) include the following.
Specific examples of the AO adduct of lanolin are as follows. These are ethylene oxide adducts.
The AO adduct of untreated lanolin is not particularly limited as long as it is used as a cosmetic raw material, but Nikko Chemicals Corporation's NIKKOL TW-10, TW-20, TW-30; L-30, L-50 (all are trade names) are used.
Examples of the AO adduct of reduced lanolin include POLYCHOLWH-50, POLYCHOL WH-150, POLYCHOL WH-200, POLYCHOL WH-400 manufactured by Croder Japan, Nikko Chemicals Corporation NIKKOL BW-10, BW-20, BW-30; New Nippon Rika Co., Ltd. Rikaraanol RE-14 (all are trade names) are used.

Specific examples of the AO adduct of castor oil are as follows. These are ethylene oxide adducts. These examples include both the untreated castor oil AO adduct and the hardened castor oil AO adduct.
Namely, Nikko Chemicals CO-20 (HLB value: 10.5), HCO-40 (HLB value: 12.5), CO-50TX (HLB value: 14.0), CO-60TX (HLB value: 14) 0.0), HCO-50 (HLB value: 13.5), HCO-60 (HLB value: 14.0), HCO-80 (HLB value: 15.0), HCO-100 (HLB value: 16.5) ) (All product names).

  In the component (A), an AO adduct of lanolin is preferably used, and an ethylene oxide adduct of lanolin is more preferably used, particularly from the viewpoint of imparting smoothness to the thin paper. In the AO adduct of lanolin, one using untreated lanolin is preferred to reduced lanolin.

(A) A component can be used 1 type or in mixture of 2 or more types.
The blending ratio of the component (A) in the entire thin paper treating agent is preferably 0.05 to 50% by mass, more preferably 0.1 to 20.0% by mass, and further preferably 0.5 to 10% by mass. .
By setting it to the lower limit value or more, the desired smoothness and flexibility can be sufficiently obtained, and by setting the upper limit value or less, it is possible to suppress the tendency for moist feeling to decrease due to insufficient amount of the moisturizing component.

(B) Polyhydric alcohol (B) As a component, although it does not specifically limit, C2-C20, Preferably
Those having 2 to 10 are preferred, and the number of hydroxyl groups is preferably 2 to 10, more preferably 2 to 6.
(B) A component can be used 1 type or in mixture of 2 or more types.

Specific examples of the component (B) include glycerin, diglycerin, ethylene glycol, propylene glycol, polyglycerin, polyethylene glycol, polypropylene glycol, sorbitol, xylitol, and erythritol. And it is preferable that (B) component contains glycerol among these.
From the viewpoint of stability over time, it is also preferable to further use propylene glycol and sorbitol together with glycerin.
The glycerin is desirably used in an amount of 40% by mass or more, more preferably 60% by mass or more, and may be 100% by mass with respect to the total component (B). By setting it to the lower limit value or more, smoothness can be improved by improving moisture retention in thin paper. Moreover, softness can be improved.

(B) The compounding quantity of a component is 40.0-99.5 mass% in the whole active ingredient of the thin paper processing agent except water, More preferably, 50.0-99.0 mass%, Furthermore, 60.0 ˜99.0% by mass.
By setting it to the lower limit or more, the moisturizing power can be improved and the moist feeling can be improved. By setting it to the upper limit or less, it becomes relatively easy to ensure the content of the component (A), and as a result, the smoothness and softness of the thin paper can be improved.

(C) Surfactant The component (C) may be any of an anionic surfactant, a cationic surfactant, a nonionic surfactant, and an amphoteric surfactant. However, it is necessary that the component does not correspond to the component (A). And it is preferable that (C) component contains an anionic surfactant especially from the point of maintaining temporal stability.
Examples of the anionic surfactant include alkylbenzene sulfonate, α-olefin sulfonate, polyoxyethylene alkyl ether sulfate, alkyl phosphate ester salt, N-alkyl-N-methyl-β-alanine salt, fatty acid salt, poly And oxyethylene alkyl ether acetate. Of these, carboxylate having a hydrophilic group is preferred. The counter ion of the anionic surfactant is preferably an alkali metal such as potassium or sodium, and more preferably sodium.
Examples of the cationic surfactant include alkyltrimethylammonium salts, N, N-dialkyloyloxyethyl-N-methyl, N-hydroxyethylammonium salts and the like.
Examples of nonionic surfactants include polyoxyethylene alkyl ethers and polyglycerin fatty acid esters.
As the amphoteric surfactant, fatty acid amidopropyl betaine, N-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, or the like can be used.

  The component (C) is preferably added to the entire thin paper treating agent in an amount of 0.05 to 10% by mass, more preferably 0.1 to 5% by mass. By setting it to the lower limit value or more, the temporal stability becomes good, and by setting it to the upper limit value or less, the temporal stability becomes good and it is economically advantageous.

Other Components In the thin paper treating agent used in the present invention, it is preferable to use water from the viewpoint of temporal stability.
For example, ion-exchanged water is preferably used as the water.
The mixing ratio of water is preferably 50% by mass or less, and more preferably 30% by mass or less. Substantially 5% by mass or more is preferable from the viewpoint of stability over time.
By setting it to the upper limit value or less, foaming can be suppressed when thin paper processing such as coating is performed, and generation of wrinkles of the thin paper immediately after coating can be suppressed.

Moreover, you may use a preservative for the thin paper processing agent used in this invention.
Examples of the preservative include oxybenzoic acid series such as benzoate and methylparaben; organic nitrogen series typified by hexahydro-1,3,5-tris (2-hydroxyethyl) -S-triazine; 1,2- Benzisothiazoline-3-one, 2-methyl-4-isothiazolin-3-one, 5-chloro-2-methyl-4-isothiazolin-3-one, 2-n-octyl-4-isothiazoline, N-butyl-1,2 -Organic nitrogen sulfur-based such as benzisothiazolin-3-one; 1,2-bis (bromoacetoxy) ethane, 2,2-dibromo-3-nitrilopropionamide, bistribromomethylsulfone and the like Organic bromine system; or a compound such as organic sulfur system represented by 4,5-dichloro-1,2-dithiol-3-one Can be used preservative was used.
An antiseptic | preservative is 0.01-10 mass% in the whole thin paper processing agent, Preferably 0.05-2 mass% is mix | blended.

  In addition, the tissue treatment agent contains other sugars such as fructose, glucose and oligosaccharides, antioxidants such as vitamin C and vitamin E, fragrances, deodorants, pigments and extracts. Can do.

Manufacturing method of thin paper processing agent A thin paper processing agent should just mix each compounding component uniformly according to a conventional method, and can be manufactured by a conventionally well-known method.

[Thin paper]
The thin paper to which the thin paper treating agent is applied is not particularly limited, and paper obtained by a conventionally known paper making method can be used.
Here, the thin paper means paper that is very thinly spread (Japanese paper, Western paper), and preferably has a basis weight of 40 g / m ² or less, more preferably 20 g / m ² or less. It is used for household use such as toilet paper, tissue paper, and paper towel, and for business use such as tableware, packaging, and hygiene, but is preferably used for home use.
Preferably, the thin paper treatment agent to be applied to the present invention is used as it is or appropriately diluted with water (preferably ion exchange water) as a secondary treatment agent, and this is applied to the surface of the thin paper and dried. Then, the thin paper processed by the thin paper processing agent applied to this invention is obtained.
The coating amount of the thin paper treatment agent is 1-50% by mass, preferably 5-30% by mass, and more preferably 10-25% by mass, based on the dry weight of the thin paper, in terms of active ingredient converted mass excluding water. preferable. By setting it to the lower limit value or more, the desired texture improving effect is improved. By setting it to the upper limit value or less, it is possible to suppress a tendency to impair the appearance of thin paper such as wrinkles. Moreover, it is economically advantageous.
As a coating method, a conventionally known method such as a roll transfer method or a spray coating method can be adopted.

Thus, if it processes using the thin paper processing agent applied to this invention, the texture of a thin paper can be improved. Specifically, at least one, preferably all of moist feeling, smoothness and softness can be improved.
Further, the thin paper treatment agent applied to the present invention has good temporal stability. Therefore, stability over time is ensured during transport, storage, and manufacturing. And especially when it consists of a plurality of components having different characteristics, it is difficult to maintain stability over time, but in the present invention, the (B) component and the (A) component tend to have high hydrophilicity and heavy specific gravity. Even if it contains a relatively lipophilic compound such as the above, stability over time can be realized.

  Hereinafter, the present invention will be described in more detail using examples, but the present invention is not limited to these examples.

(Reference Example 1-2, Example 3-7, Comparative Example 1-4) to (1) the material shown in the preparation Table 1 thin paper treating agent, used in a proportion shown in Table 2-3. The unit of composition of each component shown in Tables 2 to 3 is mass%.
In the manufacture of the thin paper treatment agent, first, water was first added to the component (B) and stirred and mixed at room temperature, and then the component (C) was added and further stirred until it became uniform and transparent.
Next, component (A) or hardened castor oil was added and stirred and mixed at room temperature to obtain a thin paper treating agent.

(2) Treatment of thin paper The thin paper treating agent was allowed to stand at room temperature for 2 weeks.
At this time, the treating agent in which separation or precipitation had occurred was regarded as having a problem in practicality, and judged to be “unapplicable”, and the processing of the thin paper was stopped. For Comparative Examples 3 and 4 that were “unapplicable”, “unapplicable” was written in the texture evaluation column of Table 2.
For other thin paper processing agents whose appearance was confirmed to be uniform and transparent, the secondary processing agent was diluted with ion-exchanged water so as to be 40% by mass in terms of active ingredients (components excluding water). Adjusted.
Next, the secondary treatment agent was spray-applied to 50% by mass with respect to the untreated tissue paper, and left in a constant temperature and humidity chamber (temperature 20 ° C., humidity 65% RH) for 24 hours. The texture of the paper was evaluated.

(3) Evaluation of the texture The texture of the treated tissue paper is touched with the smoothness, moistness and softness of the untreated product and the treated product at the same time on both the left and right sides. Carried out.

  Further, the following criteria were used to determine the total score of five panelists. The results are shown in Tables 2 and 3.

(4) Evaluation of stability over time The thin paper treating agent was stored for 1 month at 25 ° C. and 40 ° C., respectively, and the presence or absence of separation was visually determined according to the following criteria. The results are shown in Tables 2 and 3.
○: Transparent and uniform △: Slight separation or precipitation is observed ×: Remarkable separation or precipitation is observed

  As is apparent from Tables 2 and 3, good results were obtained in any of the examples according to the present invention.

Claims (2)

(A) one or more compounds selected from the group consisting of an alkylene oxide adduct of lanolin and an alkylene oxide adduct of castor oil, (B) a polyhydric alcohol, (C) a surfactant [provided that (A) And a component (B) containing glycerin, propylene glycol and sorbitol, and a thin paper treated with a thin paper treating agent. The thin paper according to claim 1, wherein the component (C) is treated with a thin paper treating agent containing an anionic surfactant.