JP2009035833A - Thin paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide thin paper improved in dry touch and smoothness. <P>SOLUTION: The thin paper contains 5-50 wt.% of a thin paper treatment agent in substrate paper, and the elongation percentage of the thin paper is 10-20%. The substrate paper is 10-35 g/m<SP>2</SP>in basis weight per ply. The thin paper treatment agent contains a cationic surfactant and is 0-3 wt.% in talc content, and also contains at least one of an ester of a fatty acid and an aliphatic alcohol, and a fatty acid triglycerol ester, wherein the ester is made from a monovalent 8-32C fatty acid and a 3-20C monohydric aliphatic alcohol, and the latter ester consists of a vegetable oil with the number of carbon atoms in its fatty acid residue being 12-24 and the iodine value 30-190. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a thin paper which contains a treatment agent for improving flexibility, smoothness and smooth feeling and has improved touch.

Recently, a so-called high-quality tissue paper with a moisturizing agent and other thin paper treatment agent that has been moistened and improved in touch has been put on the market. It is popular because it is difficult to turn red (see, for example, Patent Document 1 and Patent Document 2).
However, as it becomes more widespread, it is often used for new skin care applications such as rubbing sensitive areas such as the eyes to blur the eye shadow during makeup and retouching. In addition to the moist feeling required at the time of sniffing, the smoothness and smoothness of the surface has also been required.
From this point of view, it is known that powder, particularly preferably talc, is contained in the thin paper treatment agent in order to improve the smooth and smooth feel, but it sufficiently satisfies the requirements for various usage methods in recent years. It was not (refer patent document 3, patent document 4, etc.).
In addition, the treatment agent containing talc is not excellent in handleability, and in order to improve the smoothness and smoothness, the talc can be increased in quantity and the average particle size can be refined. Various adverse effects such as thickening over time, thickening due to entrainment of bubbles when applying a share, scattering of chemicals at the time of production and poor coating due to these are remarkable, making it difficult to use.
Japanese Patent No. 3450230 JP 2001-29256 A JP-A-5-156596 JP-A-7-82662 JP 2006-118089 A JP-A-9-296389 Japanese translation of PCT publication No. 8-510109

  Therefore, a main object of the present invention is to provide a thin paper that can be produced without any trouble and can be applied to a base paper and further improved in smoothness and smoothness.

<Invention of Claim 1>
It contains 5-50% by weight of a thin paper treating agent relative to the base paper,
The base paper has a basis weight of 10 to 35 g / m ² per ply, and an elongation percentage of the paper after processing with a thin paper treating agent is 10 to 20%.
The thin paper treating agent contains a cationic surfactant, the content of talc is 0 to 3% by weight, and contains at least one of fatty acid and fatty alcohol ester and fatty acid triglycerin ester,
The ester of the fatty acid and the aliphatic alcohol is an ester composed of a monovalent fatty acid and a monovalent aliphatic alcohol, which is a fatty acid having 8 to 32 carbon atoms and an aliphatic alcohol having 3 to 20 carbon atoms,
A thin paper, wherein the triglycerin ester of fatty acid is a vegetable oil having a fatty acid residue having 12 to 24 carbon atoms and an iodine value of 30 to 190.

(Function and effect)
In the present invention, a base paper is made to contain a thin paper treating agent containing a cationic surfactant, a specific ester, and a triglycerin ester.
This specific ester, triglycerin ester improves the smoothness and moist feeling of the thin paper very effectively by using a cationic surfactant in combination.
Although it is not certain, since the fiber of the base paper is anionic, when the thin paper treating agent of the present invention is contained therein, the specific ester, triglycerin is obtained through an appropriate binding force with the cationic surfactant. The ester will adhere to the base paper fiber, and the lubricity of the cationic surfactant and the dissociation action with the cationic surfactant will cause the specific ester and triglycerin ester to slip on the base paper fiber. It is thought that smoothness and smoothness can be obtained when touching the skin.
In addition, when the talc content is less than 3% by weight, an increase in viscosity during the production of the treatment agent is improved, and the handleability and coating property of the treatment agent are remarkably improved. This improvement in coating properties eliminates coating unevenness and improves the texture. Further, coupled with improved handling of the treatment agent, the productivity of the thin paper is significantly improved. For example, after a thin paper treatment agent is applied to the base paper that has been made, the base paper is transported for folding in a facility that is folded by an interfolder or the like or a folding device exemplified in Japanese Patent Application No. 2004-251874 by the present applicant. High-speed production is also possible with equipment that applies a thin paper treatment agent in the process.

<Invention of Claim 2>
The thin paper treating agent according to claim 1, wherein the thin paper treating agent further contains an aliphatic alcohol.

(Function and effect)
The smoothness is further improved.

<Invention of Claim 3>
The thin paper according to claim 1 or 2, wherein the thin paper treating agent comprises a nonionic surfactant.

(Function and effect)
Forms a gel-like aggregate with a cationic surfactant in the ester, triglycerin ester, and aliphatic alcohol, and when the thin paper is touched with a finger, the touch of the gel collapses, resulting in a slimy, smooth, smooth feeling At the same time, it is thought that a moist feeling can be obtained by releasing the water trapped in the aggregate. Moreover, liquid stability improves by forming this gel state, and liquid separation during storage is suppressed.

  As described above, according to the present invention, there is provided a thin paper that can be produced without any trouble and that has improved smoothness and smoothness.

Hereinafter, embodiments of the present invention will be described in detail.
The thin paper of the present invention may be one ply, two plies (a set of two stacked sheets), three plies, four plies or more. In the case of a plurality of plies, the chemical solution may be contained only in the base paper constituting the surface, or the chemical solution may be contained in all the base papers.
On the other hand, the elongation of the thin paper of the present invention is 10 to 20%, particularly preferably 10 to 15%. If the elongation is less than 10%, it is torn during production and troubles such as paper breakage occur. Further, if the elongation rate exceeds 20%, the surface of the paper has a large number of irregularities, so that it may feel rough when the skin is rubbed.
This elongation rate is measured according to JIS P8113. Specifically, the dry tensile strength in the machine direction of the paper is measured, and the elongation percentage of the paper is calculated from the length of the paper immediately before the break and the length of the paper before the measurement. The measurement is performed with 2 plies for the final product, that is, a 2-ply product, and with 3 plies for a 3-ply product.
On the other hand, in the thin paper of the present invention, the number of wrinkles per 1 cm is preferably 3000 to 8000 from an arbitrary point. If the number of wrinkles is less than 3000, the paper does not stretch and tears, and troubles such as paper breakage occur. If it is 8000 or more, the surface of the paper has a large number of irregularities, so that it may feel rough when the skin is rubbed. In addition, the number of wrinkles is a value obtained by measuring four wrinkle intervals of the tissue with a laser microscope (manufactured by Keyence Corporation: VK-9510) and calculating the number of wrinkles per 1 cm from the average of the intervals. .

[About base paper]
The base paper of the thin paper of the present invention is not limited in the same manner because the number of plies of the thin paper is arbitrary. It can be appropriately selected depending on the use of the thin paper.
However, the weight per ply (JIS P 8124) is 10.0 to 35.0 g / m ² . When the rice tsubo is smaller than 10.0 g / m ² , sufficient strength cannot be maintained, and it is torn at the time of manufacture, causing paper breakage or the like. On the other hand, if the rice tsubo is larger than 35.0 g / m ^{2, the} product becomes bulky when folded by a folding device such as an interfolder at the time of manufacture, so that the portability of the product is deteriorated.
On the other hand, the thickness of the base paper of the thin paper of the present invention (measured by a Peacock manufactured by Ozaki Seisakusho) is, for example, preferably 100 to 300 μm, particularly 130 to 200 μm in 2 plies (two sheets stacked). Half of that is desirable.
Further, it is desirable that the base paper has an elongation of 10 to 35%, particularly preferably 15 to 30%. If the elongation percentage of the base paper itself falls within this range, the desired elongation percentage of the thin paper can be achieved even if the thin paper treating agent is contained. The method for measuring the elongation rate is the same as the method for measuring the elongation rate of the thin paper described above.
The elongation rate has a large correlation with the crepe rate, and in order to suitably achieve the elongation rate, it is desirable that the crepe rate at the time of manufacturing the base paper is 12.0 to 26.0%. The crepe rate is a value calculated by the formula (((peripheral speed of the dryer during paper manufacture) − (peripheral speed of the reel)) / (peripheral speed of the dryer during paper manufacture) × 100).
On the other hand, as the base paper of the thin paper of the present invention, a known paper obtained by a known papermaking technique can be used without limitation, but the NBKP blending ratio (JIS P 8120) in the pulp raw material is particularly 30.0-80. A content of 0%, particularly 40.0-70.0% is preferred.
On the other hand, as the base paper of the present invention, the dry tensile strength defined in JIS P 8113 (hereinafter also referred to as dry paper force) is 2 clies in the longitudinal direction of 130 cN / 25 mm or more, more preferably 150 cN / 25 mm or more. Particularly, it is preferable to use 280 to 400 cN / 25 mm, lateral direction of 40 cN / 25 mm or more, more preferably 60 to 100 cN / 25 mm, and particularly preferably 60 to 90 cN / 25 mm. If the dry paper strength of the base paper is too low, it is easily broken during manufacturing and troubles such as paper breakage occur, and if it is too high, the touch becomes stiff when used.
These paper strengths can be adjusted by a known method. For example, a paper strength agent is internally added (added to a stage before the dryer part, for example, pulp slurry), and pulp freeness is reduced (for example, about 30 to 40 ml is reduced). It is possible to appropriately combine several techniques such as increasing the NBKP blending ratio (for example, 50% or more), adding a paper strength agent to the thin paper processing agent described later, and the like.
As the dry paper strength agent, CMC (carboxymethylcellulose) or a salt thereof such as sodium carboxymethylcellulose, carboxymethylcellulose calcium, carboxymethylcellulose zinc and the like can be used. As the wet paper strength agent, polyamide / epichlorohydrin resin, urea resin, acid colloid / melamine resin, thermal crosslinkability imparting PAM, or the like can be used. When the wet paper strength agent is internally added, the addition amount can be about 5 to 20 kg / t in weight ratio to the pulp slurry. Moreover, when adding CMC internally, the addition amount can be about 0.5-1.0 kg / t by weight ratio with respect to a pulp slurry.

[About thin paper treatment agent]
In the present invention, a thin paper treating agent is contained in the base paper. In the present invention, the content of the thin paper treatment agent in the thin paper is 5 to 50% by weight based on the base paper. A particularly preferred range is 15 to 30% by weight. If the content of the processing agent for the thin paper is too small, not only the effect becomes poor, but also the coating amount on the base paper becomes unstable, and if it is too much, it becomes sticky and the smoothness and smooth feeling are hindered.
As a method for containing the thin paper treating agent, a conventionally known method, for example, an arbitrary method such as a roll transfer method, a spray coating method, or an immersion method can be adopted.
The thin paper treating agent of the present invention comprises about 60 to 100% by weight, particularly about 80 to 95% by weight of an active ingredient, and about 0 to 40% by weight, particularly about 5 to 20% by weight of an ineffective ingredient such as moisture. Can be configured.

(Cationic surfactant)
The thin paper treating agent of the present invention contains a cationic surfactant in order to further improve the smoothness.
Since this cationic surfactant functions as a softening agent for improving the flexibility of the base paper in addition to the smoothness improving effect, the blending amount is preferably determined in consideration of this effect. The surfactant is preferably contained in the active ingredient in an amount of 0.05 to 30% by weight. A more preferable content is 0.1 to 10% by weight. If the amount of the surfactant is too large, foaming is likely to occur, which may cause deterioration in texture and operability. On the other hand, if the amount is too small, the smoothness improving effect and the softening effect are poor.
As the cationic surfactant, a quaternary ammonium salt, an amine salt, an amine, or the like can be used. Examples thereof include stearyl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, cetostearyl trimethyl ammonium chloride, distearyl dimethyl ammonium chloride, dibehenyl dimethyl ammonium chloride and the like.
Preferably, it is a quaternary ammonium salt having an ester bond in the molecule (hereinafter sometimes referred to as ester-type quaternary ammonium salt), and specifically, a trivalent salt represented by the following general formula (I). An ester-type quaternary ammonium salt, a diester-type quaternary ammonium salt represented by the general formula (II), a monoester-type quaternary ammonium salt represented by the general formula (III), or a mixture thereof. . A method for synthesizing this ester type quaternary ammonium salt is disclosed, for example, in JP-A-5-98571 and Japanese Patent Application No. 2007-141348.

In general formulas (I) to (III), R _{1 to} R ₃ and R _{5 to} R ₇ are each an alkyl or alkenyl group having 9 to 23 carbon atoms, preferably 13 to 19 carbon atoms. When it is 9 or more, a soft texture can be suitably imparted when applied to thin paper, and when it is 23 or less, a thin paper treating agent with high liquid stability can be obtained.
In general formulas (I) to (III), R ₄ is an alkyl group having 1 to 4 carbon atoms or a hydroxyalkyl group. Specific examples include a methyl group, an ethyl group, a propyl group, a butyl group, and a hydroxyethyl group. A methyl group and an ethyl group are preferable, and a methyl group is particularly preferable.
In general formula (I)-(III), p is an integer of 2-4, Preferably it is 2 or 3, Comprising: 2 is especially preferable. When p is 3, the group represented by —C _p H _2p — is preferably an isopropylene group.
In general formulas (I) to (III), n is an integer of 2 to 4, preferably 2. M is an integer of 0 to 3, preferably 0 or 1, and particularly preferably 0. Each n, m, and p in one molecule may be the same as each other or different from each other.
X ⁻ represents an anion, preferably halogen ions such as chlorine, bromine and iodine, alkyl sulfate ions such as methyl sulfate and ethyl sulfate, and methyl carbonate ions, and more preferably chlorine ions, bromine ions, methyl sulfate ions and ethyl sulfate ions. Furthermore, methyl sulfate ion and ethyl sulfate ion are preferable. In particular, methyl sulfate ion is preferable from a practical viewpoint such as the corrosiveness of equipment.

On the other hand, the thin paper treating agent of the present invention has a talc content of 0 to 3% by weight. From the viewpoint of preventing thickening of the thin paper treatment agent, and since the thin paper treatment agent of the present invention can express sufficient smoothness and smooth feeling without using talc, talc is not contained, that is, 0 weight. % Is desirable. However, if it is up to 3% by weight, the increase in the viscosity of the chemical solution can be small.
Here, in the thin paper processing agent of this invention, the powder component which does not participate in thickening other than a talc can be used. Examples of usable powders include kaolin, clay, calcium carbonate, titanium oxide, calcium stearate, zinc stearate, lithium stearate, processed starch, corn starch, wheat flour, potato starch, rice starch, and wheat flour protein. be able to.
However, the powder component preferably has an average particle diameter of more than 5 μm and not more than 200 μm, and more preferably 10 to 100 μm. If the average particle size of the powder component is 5 μm or less, the effect of suppressing sticking to the skin is poor, and a sticky feeling remains. On the other hand, when the average particle diameter of the powder component exceeds 200 μm, although the sticking to the skin can be suppressed, the rough feel of the powder component is strongly felt and the usability may be deteriorated.

On the other hand, the thin paper treating agent of the present invention is characterized by a predetermined fatty acid characteristically in order to achieve the smoothness and smoothness expected when the amount of talc is increased more than that of talc, especially when compared with conventional products. And at least one of an ester of an aliphatic alcohol and a triglycerin ester of a fatty acid.
The ester of the fatty acid and the aliphatic alcohol is an ester composed of a monovalent fatty acid and a monovalent aliphatic alcohol, and is an ester of a fatty acid having 8 to 32 carbon atoms and an aliphatic alcohol having 3 to 20 carbon atoms. Yes, preferably an ester of a fatty acid having 8 to 20 carbon atoms and a fatty acid alcohol having 3 to 18 carbon atoms.

Specific examples of the fatty acid include lauric acid, myristic acid, pentadecanoic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, etc., and the aliphatic alcohol is preferably a linear or branched higher alcohol. Examples include propyl alcohol, isopropyl alcohol, butyl alcohol, amyl alcohol, hexyl alcohol, heptyl alcohol, octyl alcohol, lauryl alcohol, mythyl alcohol, cetyl alcohol, octadecyl alcohol (stearyl alcohol), oleyl alcohol, and linoleyl alcohol. Accordingly, specific examples of esters include hexyl laurate, cetyl myristate, isopropyl myristate, isopropyl palmitate, stearyl stearate, decyl oleate, oleyl oleate, cetyl linolenate, isostearyl laurate, and the like.
This ester is contained in the active ingredient in an amount of 0.01 to 10% by weight, preferably 0.05 to 8% by weight, particularly preferably 0.1 to 5% by weight. If it is less than 0.01% by weight, the texture such as smoothness and smoothness is not sufficiently exhibited, and if it exceeds 10% by weight, the effect of improving the texture corresponding to the added amount cannot be obtained. Moreover, the oily feeling becomes strong and the desired texture cannot be obtained.

On the other hand, the triglycerin ester of the fatty acid is a vegetable oil having a fatty acid residue having 12 to 24 carbon atoms and an iodine value of 30 to 190. The fatty acid residue may have 12 to 24 carbon atoms, more preferably 16 to 22 carbon atoms. More preferably, it is a triglycerin ester of a fatty acid containing 35% by weight or more of a fatty acid residue having 18 to 22 carbon atoms. Specific examples of the triglycerin ester include avocado oil, almond oil, grape seed oil, corn oil, straw oil, jojoba oil, macadamia nut oil, rosehip oil, safflower oil, sunflower oil, soybean oil, cottonseed oil, sesame oil, rapeseed Oil, palm oil, soybean oil, olive oil, palm oil, castor oil and the like. Alternatively, hydrogenated fatty acid triglycerin may be used.
The triglycerin ester is contained in the active ingredient in an amount of 0.01 to 10% by weight, preferably 0.05 to 8% by weight, particularly preferably 0.1 to 5% by weight. When the amount is less than 0.01% by weight, the texture such as smoothness and smooth feeling is not sufficiently exhibited. Moreover, the oily feeling becomes strong and the desired texture cannot be obtained.

  Further, the thin paper treating agent preferably contains an aliphatic alcohol. As the aliphatic alcohol, an aliphatic alcohol having 8 to 24 carbon atoms is preferable, and an aliphatic alcohol having 16 to 22 carbon atoms is particularly preferable. Specific examples of the aliphatic alcohol include cetyl alcohol, octadecyl alcohol (stearyl alcohol), isostearyl alcohol, oleyl alcohol, linoleyl alcohol, aralkyl alcohol, behenyl alcohol, and hardened rapeseed oil alcohol.

  On the other hand, the thin paper treating agent of the present invention preferably contains a nonionic surfactant in order to improve the slipping of the surface of the thin paper and to express smoothness and smooth feeling. Nonionic surfactants include polyoxyethylene sorbitan fatty acid esters, sorbitan fatty acid esters, diethylene glycol monostearate, diethylene glycol monooleate, glyceryl monostearate, glyceryl monooleate, and propylene glycol monostearate. Fatty acid ester, N- (3-oleoxy-2-hydroxypropyl) diethanolamine, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbit dense wax, polyoxyethylene sorbitan sesquistearate, polyoxyethylene monooleate, polyoxyethylene mono Laurate, polyoxyethylene cetyl ether, polyoxyethylene lauryl ether and the like can be used.

Suitable nonionic surfactants are polyoxyethylene sorbitan fatty acid esters, among which polyoxyethylene sorbitan monolaurate and polyoxyethylene sorbitan monostearate are particularly suitable. The addition amount of ethylene oxide is not particularly limited and is selected to be about 3 to 100, but is preferably 20.
This nonionic surfactant is contained in the active ingredient in an amount of 0.05 to 10% by weight, preferably 0.1 to 8% by weight, particularly preferably 0.2 to 5% by weight. If it is less than 0.05% by weight, the texture such as smoothness and smooth feeling is not sufficiently exhibited, and if it exceeds 10% by weight, the effect of improving the texture corresponding to the added amount cannot be obtained.
Furthermore, the use ratio of the polyoxyethylene sorbitan fatty acid ester and the cationic surfactant is preferably in the range of 5/95 to 70/30, more preferably 10/90 to 50/50. In this range, the gel structure formed by the cationic surfactant and the polyoxyethylene sorbitan fatty acid ester improves the texture.

Moreover, as another active ingredient, a moisturizer can be contained, for example. As the humectant, polyhydric alcohols such as glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, saccharides such as sorbitol, glucose, xylitol, maltose, maltitol, mannitol, trehalose, glycolic drugs, and the like One or more of derivatives, liquid paraffin, collagen, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hyaluronic acid or a salt thereof, ceramide, and the like can be used in any combination.
The humectant is preferably contained in the active ingredient in an amount of 50 to 90% by weight, particularly preferably 70 to 85% by weight. If there is too much moisturizing agent, if it is too much, stickiness will increase, which may lead to deterioration of texture and operability, and if it is too little, the feeling of moistness will be poor.

Further active ingredients include various vitamins such as vitamin C and vitamin E, amino acids such as glycine, aspartic acid, arginine, alanine and cystine, aloe extract, amacha extract, ashitaba extract, karin extract, cucumber extract, horsetail extract, Plant extract extracts such as tomato extract, wild rose extract, loofah extract, lily extract, and lotus extract, chitosan, urea, honey, royal jelly and the like can be used. A keratinocyte-like component such as MPC polymer (2-methacryloyloxyethyl phosphorylcholine polymer) can also be added.
The content of these various vitamins and plant extracts is preferably about 0.0001 to 3% by weight in the active ingredient.

The thin paper treating agent can be obtained by uniformly mixing the components. During the mixing, the thin paper treating agent according to the present invention has a talc content of less than 3% by weight, so that it increases in viscosity over time, and increases in viscosity due to entrainment of bubbles when sheared. Various problems such as scattering of chemicals at the time of manufacture due to are not generated.
On the other hand, the thin paper treating agent preferably has a pH of 2 to 9 at 20 ° C., more preferably 3 to 8. Therefore, an appropriate pH adjuster (for example, sodium hydroxide, sulfuric acid, etc.) can be added as necessary. When the pH is in the above range, the storage stability is improved. Moreover, it becomes gentler and less irritating to the skin, which is preferable.
By incorporating the thus obtained thin paper treating agent into the base paper, a thin paper having a very good touch (feel) such as a slimy feeling, smoothness, smooth feeling, moist feeling, and softness can be obtained.

[Preferred production method example]
On the other hand, the thin paper of the present invention is not limited by the production method, but in the case of a product form to be folded and laminated, for example, a box-type tissue paper, after applying the thin paper treatment agent to the base paper produced, the interfolder Compared to folding with a folding device such as a folding device, if a thin paper treatment agent is applied in the process of transporting the base paper for folding in the folding device, it can be produced efficiently, and evaporation of the thin paper treatment agent and moisture is less It is preferable because a product with stable quality can be manufactured. An example of the latter method is Japanese Patent Application No. 2004-251874 filed by the present applicant.

Various 2-ply shoe papers (Examples 1 to 5 and Comparative Examples 1 and 2 according to the present invention) shown in Table 1 were produced, and sensory evaluation and various physical properties were measured. Table 1 shows the composition of the thin paper treating agent and the physical properties of the base paper.
"Smoothness"
A sensory evaluation of 30 subjects was performed. The evaluation was performed by scoring how to feel the smoothness by touching the thin paper as a sample, hitting it against the face, biting the nose, etc., using Comparative Example 1 as a reference. The score is 3 points: the texture is clearly inferior compared to Comparative Example 1, 4 points: the texture is slightly inferior to Comparative Example 1, 5 points: equivalent to Comparative Example 1, 6 points: Compared with Comparative Example 1, it can be seen that the texture is slightly better, 7 points: Compared with Comparative Example 1, it is apparent that the texture is clearly superior. The score in the table is the average of 30 people.
"Feeling smooth"
A sensory evaluation of 30 subjects was performed. The evaluation was performed by scoring how to feel the smooth feeling by touching the thin paper as a sample, hitting the face, biting the nose, etc., using Comparative Example 1 as a reference. The score is 3 points: the texture is clearly inferior compared to Comparative Example 1, 4 points: the texture is slightly inferior to Comparative Example 1, 5 points: equivalent to Comparative Example 1, 6 points: Compared with Comparative Example 1, it can be seen that the texture is slightly better, 7 points: Compared with Comparative Example 1, it is apparent that the texture is clearly superior. The score in the table is the average of 30 people.
`` Viscosity difference ''
It is a comparative value of the viscosity of what was stored at 40 ° C. for 4 weeks after production and the initial viscosity. The viscosity (unit: mPa · s) was measured as follows. 100 g of the prepared thin paper treating agent was put in a 100 mL sample bottle, and the temperature was adjusted in a constant temperature bath at 40 ° C. for 2 hours. Thereafter, a B-type viscometer (manufactured by TOKIMEC) was used for No. 1000 mPa · s. 2 rotor, 1000 to 4000 mPa · s is No. Using 3 rotors, the value after 30 seconds was read at 30 rpm.
“Chemical stability (time)”
The case where the viscosity difference was 20 or less was evaluated as ◯, the case where the viscosity difference was 50 or more was evaluated as Δ, and the case where the viscosity difference was 100 or more was evaluated as ×.
“Chemical stability (during processing)”
The viscosity increase during operation is excellent in operability when it is 200 or less (○ in the table), the viscosity increase during operation is 200 to 400 or less (△ in the table), and the viscosity increase during operation is There is a risk that troubles may occur in operation of more than 400 (X in the table).
"Drug"
The following drugs were used.
Talc: MICRO-ACE-K-1 (made by Nippon Talc)
Hexyl laurate: Kurodamol HL-R (Cloder Japan)
Oleyl alcohol: Oleyl alcohol 90VR (manufactured by Higher Alcohol Industry)
Cetyl alcohol: Cetanol NX (manufactured by Higher Alcohol Industry)
Hardened rapeseed oil alcohol: alcohol NO. 20-B (made by higher alcohol industry)
Hydrogenated palm oil: NOMCOAT PHS (Nisshin Oillio Group)
Diester cation: ester-type quaternary ammonium salt

From the results of Table 1, the examples of the present invention have no increase in the viscosity of the thin paper treatment agent in the production process, and the sensory evaluation is almost the same as or higher than the comparative example including talc in terms of smoothness and smoothness. Has been obtained.
Thus, according to the present invention, there is provided a thin paper that can be produced without any trouble such as thickening of the treatment agent due to the inclusion of talc, and further improved in smoothness and smoothness.

  The present invention is applicable to thin paper such as tissue paper, toilet paper, kitchen paper, and crepe paper.

Claims (3)

It contains 5-50% by weight of a thin paper treating agent relative to the base paper,
The base paper has a basis weight of 10 to 35 g / m ² per ply, and an elongation percentage of the paper after processing with a thin paper treating agent is 10 to 20%.
The thin paper treating agent contains a cationic surfactant, the content of talc is 0 to 3% by weight, and contains at least one of fatty acid and fatty alcohol ester and fatty acid triglycerin ester,
The ester of the fatty acid and the aliphatic alcohol is an ester composed of a monovalent fatty acid and a monovalent aliphatic alcohol, which is a fatty acid having 8 to 32 carbon atoms and an aliphatic alcohol having 3 to 20 carbon atoms,
A thin paper, wherein the triglycerin ester of fatty acid is a vegetable oil having a fatty acid residue having 12 to 24 carbon atoms and an iodine value of 30 to 190.   The thin paper treating agent according to claim 1, wherein the thin paper treating agent further contains an aliphatic alcohol.   The tissue paper according to claim 1 or 2, wherein the tissue paper treating agent contains a nonionic surfactant.