JPH07216781A - Wipe paper - Google Patents

Abstract

PURPOSE:To provide wipe paper capable of being soaked with water or warm water when in use, disaggregated by a small amount of aqueous alkaline solution after use and easily discarded. CONSTITUTION:To 50-99 pts.wt., preferably 85-97 pts.wt., paper making fiber such as kraft pulp, etc., and 50-1pts.wt., preferably 15 3 pts.wt., water insoluble fibrous carboxymethylcellulose having 0.2-0.65, preferably 0.25-0.40 degree of etherification, 0.1-3.0wt.% wet strength agent such as polyacrylamide, etc., and 0.5-3.0wt.% sizing agent each based on the paper making fiber are added and this mixture is made to form paper having 15-200g/m<2>, preferably 40-60g/m<2> basic weight.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to wiping paper. In detail, it can contain water or warm water at the time of use, and in this state it has appropriate wetting strength and permeation-preventing property against wipes, and after use, it is treated with a small amount of alkaline aqueous solution to form a wipe paper. The present invention relates to a wiping paper which can be easily disposed of by disintegrating and disintegrating the fibers to be separated.

[0002]

2. Description of the Related Art Wiping papers such as hand towels need to maintain their shape when they are soaked with water or warm water. A wet paper strengthening agent is added at the time of paper making, or a paper with a water resistant binder is used. The fibers that make up are bonded together. This effect is explained by a water resistant bond that is resistant to water. As described above, the wet paper strength enhancer is epoch-making in terms of imparting water resistance and wet strength, but it also has an extremely poor water degradability. Therefore, it has been pointed out that when these used wiping papers are discarded in a flush toilet or the like, the water pipe is clogged.

In order to solve this problem, research has been actively conducted for the purpose of imparting both wet strength and water decomposability without using a wet paper strength enhancer. CMC-N is a technology that applies carboxymethyl cellulose derivatives.
There is a technique for obtaining water-soluble paper by optimizing the relationship between a and its acid resistance and base saturation (Japanese Patent Laid-Open No. 139899/60).
Further, there is a technique for obtaining an alkali-disintegrating sheet by using CMC and an alkali-soluble polymer in combination (Japanese Patent Laid-Open No. 5-9900).
No.) are disclosed respectively. Further, a flushable paper to which polyvinyl alcohol is applied (Japanese Patent Laid-Open No. 22214/1990)
89), wet hydrolyzed paper (JP-A-3-213596).
No.), an easily disintegratable moisture-proof paper coated with an aqueous emulsion (JP-A-5-295200) and the like are also disclosed. All of these are intended to have both wet strength and water disintegration without using a wet strength agent, but even if the requirements are satisfied in terms of water disintegration, a wet strength agent is used. The disadvantage is that the wet strength is limited because it is not used.

[0004]

[Problems to be Solved by the Invention] It is convenient if a wiping paper such as a paper towel can be disposed of in a flush toilet after it has been used. In particular, the wiping paper used for the treatment of sewage of bedridden elderly people, the treatment of excretions of pets, etc. If it can be flushed to the flush toilet, it will be a more comfortable environment. The present invention has been made for the purpose of solving such a problem. It is an object of the present invention to provide a wiping paper which absorbs water or warm water during use, maintains wet paper strength in this state, and can be disintegrated into fibers constituting the paper in a flush toilet after use. And

[0005]

Means for Solving the Problems When the present inventors can dispose of used wiping paper in flush toilets, etc., by using a small amount of an alkaline aqueous solution together, it is possible to promote disaggregation of fibers constituting the wiping paper. We conducted various studies based on the idea that it was good. As a result, the wet paper strength enhancer and a specific fibrous substance, that is, a water-insoluble fibrous carboxymethylcellulose that can be dissolved in an alkaline aqueous solution, can be used together with the paper-making process to achieve the object of the present invention. understood.

The present invention comprises 50 to 99 parts by weight of papermaking fibers and 50 parts of water-insoluble fibrous carboxymethylcellulose.
.About.1 part by weight, and a wet paper strength enhancer is added to the papermaking fibers in an amount of 0.1 to 3.0% by weight.
The present invention relates to a wiping paper, which is characterized in that it is made into g / m 2. Further, the present invention provides a papermaking fiber 50-99.
Parts by weight and 50 to 1 parts by weight of water-insoluble fibrous carboxymethyl cellulose are mixed, the wet paper strength enhancer is 0.1 to 3.0% by weight based on the papermaking fibers, and the sizing agent is papermaking fibers. On the other hand, 0.5 to 3.0% by weight is added, and the basis weight is 15
The present invention relates to a wiping paper, which comprises laminating a sheet having a paper weight of up to 200 g / m 2 on the wiping paper.

The former wiping paper is required to be composed of one layer, have water resistance, have good water retention, and have no size. In use, it may be used in a dry state or may be used as a wipe paper in a wet state after moistening. The latter wiping paper is formed by laminating the following two layers. That is, the first layer, as a water absorption imparting layer, having water resistance, and good water retention as a wiping paper, a non-sized layer, and the other layer, as a waterproofness imparting layer, a layer imparting size, That is, it is a layer that is water-resistant and has poor water permeability as a wiping paper, and has a sizing property. In use, the wiping surface is used as the water absorption imparting layer (non-size layer), and the hand-holding surface is used as the waterproofness imparting layer (size imparting layer). By doing so, the permeation of the object to be wiped can be prevented, and hygiene and discomfort are not felt. This wiping paper may be used with its wiping surface in a dry state, or may be used as a wiping paper in a wet state after being moistened.

The above wiping paper is treated with a small amount of an alkaline aqueous solution after use, specifically, a small amount of a dilute alkaline aqueous solution (saturated aqueous solution of a hydrogen carbonate compound of an alkali metal salt, 2.5% of a carbonate compound of an alkali metal salt). By immersing it in an aqueous solution or a 0.5% aqueous solution of an alkali metal salt for 5 minutes or more, the fibers that make up the wiping paper are released, and then the fibers are flushed to a flush toilet, etc., and easily discarded. can do.

The present invention will be described in detail below. First, the one-layered wiping paper will be described. Bleached softwood kraft pulp (NBKP), Bleached hardwood kraft pulp (LBK
P), softwood bleached sulfite pulp (NBSP), thermomechanical pulp (TMP), deinked pulp (DIP)
Mainly made of papermaking fibers such as
0 ml C.I. S. F. Beaten, mixed with water-insoluble fibrous carboxymethyl cellulose (hereinafter abbreviated as fibrous CMC), and further added a wet paper strength enhancer,
In addition, a dye, a coloring pigment, clay, calcium carbonate, a filler such as titanium dioxide, a fixing agent, etc. are appropriately used in combination, and a known paper machine such as a cylinder paper machine or a Fourdrinier paper machine is used in accordance with a conventional method. Paper is made at 15 to 200 g / m 2. Further, an embossing treatment can be applied if necessary.

The fibrous CMC used in the present invention is chemically in a free acid state, and is easily disaggregated by forming an Na salt (CMC-Na) by an alkali treatment. The amount of the fibrous CMC added is 50 to 1 part by weight based on 50 to 99 parts by weight of the papermaking fibers. If the amount added is less than 1 part by weight, the water decomposability after use becomes poor. On the other hand, if it exceeds 50 parts by weight, water drainage at the time of papermaking becomes poor, which causes a decrease in production efficiency, and wet strength at the time of use becomes weak. Therefore, the addition amount of the fibrous CMC is preferably 15 to 3 parts by weight with respect to 85 to 97 parts by weight of the papermaking fibers. The degree of etherification of fibrous CMC is 0.20 to 0.6.
5, preferably 0.25 to 0.40. The fibrous CMC having an etherification degree in this range is insoluble in water and can be dissolved in the alkaline aqueous solution described above. If the degree of etherification exceeds 0.65, the fibers are likely to swell and the production efficiency is reduced. When the etherification degree is less than 0.20, the solubility in an alkaline aqueous solution becomes poor.

The wet paper strength enhancer used in the present invention is preferably a wet paper strength enhancer such as epichlorohydrin, polyacrylamide, polyethyleneimine, etc., and is added in such an amount that keeps the wet paper strength sufficient to prevent paper breakage during use. It is necessary that the addition ratio to the papermaking fiber (ratio to dry weight, the same applies hereinafter) is usually 0.1 to 3.0% by weight. If the addition amount is less than 0.1% by weight, the wet paper strengthening effect is reduced. If the amount added exceeds 3.0% by weight, the wet paper strength-enhancing effect is great, but disaggregation becomes difficult during the waste treatment after use. In addition, the feel becomes hard, which is not preferable.

The basis weight of the wiping paper is usually 15 to 200 g /
m2. When the basis weight is less than 15 g / m 2, the wet strength during use is insufficient and the amount of water absorption is small. Basis weight is 200g
When it exceeds / m2, it is inconvenient to handle it as a wiping paper. Therefore, the amount is preferably 40 to 60 g / m2.

Next, the wiping paper having a two-layer structure will be described. This is formed by stacking a water absorption imparting layer (non-size imparting layer) and a waterproof property imparting layer (size imparting layer). First, the waterproofness imparting layer will be described. Conifer bleached kraft pulp (NB
KP), hardwood bleached kraft pulp (LBKP), softwood bleached sulfite pulp (NBSP), thermomechanical pulp (TMP), deinking pulp (DIP), and other papermaking fibers, and a freeness of 450 to 600 ml C.I.
S. F. Beaten, mixed with fibrous CMC, and added with wet paper strength enhancer and sizing agent for imparting waterproofness, and also with fillers such as dyes, color pigments, clay, calcium carbonate, titanium dioxide, Using a fixing agent etc.,
A size-imparting sheet is usually produced at a rate of 15 to 200 g / m 2 using a known paper machine such as a cylinder paper machine or a Fourdrinier paper machine according to a conventional method. If necessary, embossing treatment can be applied. As the fibrous CMC and wet strength agent, the materials described above can be used.

The sizing agent is preferably a rosin sizing agent, a cation sizing agent, an alkylketene dimer sizing agent, or an alkenyl succinic anhydride sizing agent, and its addition amount to the papermaking fiber is preferably 0.5 to 3.0% by weight. If the addition amount is less than 0.5 part by weight, the size property is weak. If the addition amount exceeds 3.0% by weight, water repellency is exhibited, which is not preferable.

The basis weight is usually 15 to 200 g / m 2. When the basis weight is less than 15 g / m2, the wet strength during use is insufficient. When the grammage exceeds 200 g / m2, it becomes inconvenient to handle as a wiping paper.

The waterproof property-imparting layer (size property imparting layer) thus produced is laminated with the water absorption property-imparting layer (non-size layer) described above to obtain a product having a two-layer structure. Further, an embossing treatment can be applied if necessary. In addition, two stocks of different stock prescription (paper stock for water absorption imparting layer and paper stock for waterproofing imparting layer) are two-layer paper-made with a cylinder two-layer paper machine, and further embossed if necessary. Product. In this way, the waterproofness imparting layer having a basis weight of 15 to 200 g / m 2 and the water absorption imparting layer having a basis weight of 15 to 200 g / m 2 are laminated to form a wiping paper. Is preferably 40-60 g / m @ 2.

[0017]

The present invention will be described in detail below with reference to examples. Example 1 49 parts by weight of NBKP (dry parts by weight, the same applies hereinafter), LBK
P21 parts by weight are beaten to obtain a polyamide / epichlorohydrin resin-based wet paper strength agent (trade name “Epinox P1
30 ", manufactured by Dick Hercules Co., Ltd. 0.14 parts by weight, polyacrylic amide (trade name" Polymer Set 5 "
00L ", manufactured by Arakawa Chemical Industry Co., Ltd., 0.07 parts by weight, and added to a freeness of 550 ml C.I. S. F. And then fibrous CMC (etherification degree 0.4, trade name “Kickolate HC”, manufactured by Nichirin Chemical Industry Co., Ltd.) 30
By mixing parts by weight, using a cylinder paper machine, basis weight 50 g / m
2 (dry weight, same hereafter) was made into paper.

Example 2 49 parts by weight of NBKP and 21 parts by weight of LBKP were beaten to obtain 0.7 parts by weight of a polyamide / epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P130", manufactured by Dick Hercules Co., Ltd.), polyacryl. Amide (trade name "Polymerset 500L", manufactured by Arakawa Chemical Industry Co., Ltd.) was added in an amount of 0.07 part by weight to fix the mixture, and a freeness of 550 ml C.I. S. F. And then fibrous CM
C (degree of etherification 0.4, trade name "Kickolate H
C "and 30 parts by weight of Nichirin Chemical Industry Co., Ltd. were mixed and a wipe paper having a basis weight of 200 g / m @ 2 was produced using a cylinder paper machine.

Example 3 With the same formulation as in Example 1, only 2.1 parts by weight of the wet strength agent was used.

Example 4 63 parts by weight of NBKP and 27 parts by weight of LBKP were beaten to obtain 0.18 parts by weight of a polyamide / epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P130", manufactured by Dick Hercules Co., Ltd.), and poly. Acrylic amide (trade name "Polymerset 500L", manufactured by Arakawa Chemical Industry Co., Ltd.) 0.09 parts by weight is added to add a freeness of 550.
ml C. S. F. And then mixed with 10 parts by weight of fibrous CMC (degree of etherification 0.4, trade name "Kickolate HC", manufactured by Nichirin Chemical Industry Co., Ltd.) and using a cylinder paper machine, basis weight 50 g. / M2 wiping paper was made into paper.

Example 5 The same formulation as in Example 4 except that the wet paper strength enhancer alone was used as 0.9 parts by weight.

Example 6 69.3 parts by weight of NBKP and 29.7 parts by weight of LBKP were beaten to give a polyamide / epichlorohydrin resin-based wet strength agent (trade name "Epinox P130", manufactured by Dick Hercules Co., Ltd.) 0.2. 0.1 part by weight of polyacrylic amide (trade name "Polymer set 500L" manufactured by Arakawa Chemical Industry Co., Ltd.) was added and fixed, and the freeness of 550 ml C.I. S. F. And then fibrous C
MC (etherification degree 0.4, trade name "Kickolate H
C ", manufactured by Nichirin Chemical Co., Ltd.) was mixed with 1 part by weight, and a wiping paper having a basis weight of 50 g / m @ 2 was produced using a cylinder paper machine.

Example 7 The same formulation as in Example 6 except that the wet paper strength enhancer alone was 1.0 part by weight.

Example 8 A wiping paper having the same formulation as in Example 6 but having a wet paper strength enhancer alone in an amount of 3.0 parts by weight and having a basis weight of 200 g / m 2 was produced.

Comparative Example 1 70 parts by weight of NBKP and 30 parts by weight of LBKP were beaten to obtain 0.2 parts by weight of a polyamide / epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P130", manufactured by Dick Hercules Co., Ltd.) Acrylic amide (trade name "Polymerset 500L", manufactured by Arakawa Chemical Industry Co., Ltd.) 0.1 part by weight was added and fixed, and freeness 5
50 ml C.I. S. F. Adjusted to, using a cylinder paper machine,
A wiping paper having a basis weight of 50 g / m 2 was produced.

Comparative Example 2 63 parts by weight of NBKP and 27 parts by weight of LBKP were beaten to give polyacrylic amide (trade name "Polymer Set 500").
L ", manufactured by Arakawa Chemical Industry Co., Ltd.) was added, and the mixture was fixed with a sulfuric acid band, and the freeness was 550 ml C.I. S.
F. And then mixed with 10 parts by weight of fibrous CMC (degree of etherification 0.4, trade name "Kickolate HC", manufactured by Nichirin Chemical Industry Co., Ltd.) and using a cylinder paper machine, basis weight 50 g. / M2 wiping paper was made into paper.

Comparative Example 3 69.7 parts by weight of NBKP and 29.8 parts by weight of LBKP were beaten to obtain a polyamide-epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P130", manufactured by Dick Hercules Co., Ltd.) 1.0. 0.1 part by weight of polyacrylic amide (trade name "Polymer set 500L" manufactured by Arakawa Chemical Industry Co., Ltd.) was added and fixed, and the freeness of 550 ml C.I. S. F. And then fibrous C
MC (etherification degree 0.4, trade name "Kickolate H
C "(manufactured by Nichirin Chemical Industry Co., Ltd.) was mixed with 0.05 part by weight, and a wiping paper having a basis weight of 50 g / m @ 2 was produced using a cylinder paper machine.

Comparative Example 4 28 parts by weight of NBKP and 12 parts by weight of LBKP were beaten to obtain 0.4 parts by weight of a polyamide / epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P130", manufactured by Dick Hercules Co., Ltd.). Acrylic amide (trade name "Polymerset 500L", manufactured by Arakawa Chemical Industry Co., Ltd.) 0.1 part by weight was added and fixed, and freeness 5
50 ml C.I. S. F. And then fibrous CMC
(Degree of etherification 0.4, product name "Kickolate HC",
60 parts by weight of Nichirin Kagaku Kogyo Co., Ltd. were mixed, and a wiping paper having a basis weight of 50 g / m @ 2 was produced using a cylinder paper machine.

The evaluation results of Examples and Comparative Examples are shown in Tables 1 and 2.
Shown in.

[0030]

[Table 1]

[0031]

[Table 2]

Characteristic Evaluation Method Dimensional change when wet: The paper is immersed in water, and after 10 minutes, the lateral expansion / contraction (%) is measured. Wet paper strength: Dry tensile strength / wet tensile strength% ratio Wet tensile strength: Cut paper into 15 mm width and soak in water for 10 minutes, and measure the tensile strength (kgf / 15 mm) in the longitudinal direction of the paper with a universal tensile tester. Yes (JISP813
5). Cold water and hot water immersion Water resistance: 105mm x 86mm sample
Cut into rectangles, stir with cold water and hot water at 80 ℃, and
Observe the condition after an hour. Evaluate by the state of surface appearance changes such as disaggregation, wrinkles, and cracks. The evaluation is performed as ⊚ (excellent), ∘ (normal), and × (inferior). Water decomposability: 5 g of the sample was immersed in a 0.5 wt% caustic soda solution of 150 CC in a water bath at 20 ° C., taken out 5 minutes later, and taken out with a household mixer (manufactured by Mitsubishi Electric Corporation) containing 1000 CC of water. It disintegrated for 2 seconds, and the disaggregated state was observed.
◎ indicates completely disaggregated, ○ indicates loosening, but a small amount of undisaggregated remains, Δ indicates a large amount of undisaggregated, and × indicates no disaggregation. ○ The above is a practically usable range.

Examples of the two-layered wiping paper will be given below. Example 9 As a water absorption imparting layer, 49 parts by weight of NBKP, LBKP2
1 part by weight is beaten to obtain a polyamide / epichlorohydrin resin-based wet paper strength agent (trade name "Epinox P13
0 ”, manufactured by Dick Hercules Co., Ltd., 0.14 parts by weight, polyacrylic amide (trade name“ Polymer Set 50 ”)
0L ”, manufactured by Arakawa Chemical Industry Co., Ltd., 0.07 part by weight, and added to a freeness of 550 ml C.I. S. F. And then mixed with 30 parts by weight of fibrous CMC (degree of etherification 0.4, trade name “Kickolate HC”, manufactured by Nichirin Chemical Industry Co., Ltd.), and, on the other hand, as a water resistance imparting layer, N
63 parts by weight of BKP and 27 parts by weight of LBKP were beaten to obtain 0.9 parts by weight of a polyamide / epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P130" manufactured by Dick Hercules Co., Ltd.), polyacrylic amide (trade name " Polymer set 500L ", manufactured by Arakawa Chemical Industry Co., Ltd.) 0.09 parts by weight, rosin sizing agent (trade name" Size Pine E ", manufactured by Arakawa Chemical Industry Co., Ltd.) 1.
35 parts by weight was added, and the freeness was 550 ml C.I. S. F.
And then fibrous CMC (degree of etherification 0.
4, the stock name "Kickolate HC", manufactured by Nichirin Kagaku Kogyo Co., Ltd.) was mixed with a paper material using a cylinder multi-tank paper machine, and the basis weight of the water absorbing layer was 25 g / m2 and the waterproof property. A sheet of wiped paper having a basis weight of 50 g / m 2 was prepared by combining the basis weights of the application layers of 25 g / m 2.

Example 10 As a water absorbing layer, 49 parts by weight of NBKP and LBKP2
1 part by weight is beaten to obtain a polyamide / epichlorohydrin resin-based wet paper strength agent (trade name "Epinox P13
0 ", 0.7 part by weight manufactured by Dick Hercules Co., Ltd., polyacrylic amide (trade name" Polymer Set 50 ")
0L ”, manufactured by Arakawa Chemical Industry Co., Ltd., 0.07 part by weight, and added to a freeness of 550 ml C.I. S. F. And then mixed with 30 parts by weight of fibrous CMC (degree of etherification 0.4, trade name “Kickolate HC”, manufactured by Nichirin Chemical Industry Co., Ltd.), and on the other hand, as a water resistance imparting layer, N
63 parts by weight of BKP and 27 parts by weight of LBKP were beaten to obtain 0.9 parts by weight of a polyamide / epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P130" manufactured by Dick Hercules Co., Ltd.), polyacrylic amide (trade name " Polymer set 500L ", manufactured by Arakawa Chemical Industry Co., Ltd.) 0.09 parts by weight, rosin sizing agent (trade name" Size Pine E ", manufactured by Arakawa Chemical Industry Co., Ltd.) 1.
35 parts by weight was added, and the freeness was 550 ml C.I. S. F.
And then fibrous CMC (degree of etherification 0.
4, the product name "Kickolate HC", manufactured by Nichirin Kagaku Kogyo Co., Ltd., was mixed with 10 parts by weight of a paper material using a cylinder multi-tank type paper machine, and the basis weight of the water absorption imparting layer was 100 g / m2 and waterproofness. A paper sheet having a basis weight of 100 g / m 2 and a finished basis weight of 200 g / m 2 was produced.

Example 11 With the same formulation as in Example 9, only 2.1 parts by weight of the wet paper strengthening agent in the water absorption imparting layer was used.

Example 12 As a water absorbing layer, 63 parts by weight of NBKP (dry parts by weight, the same applies hereinafter) and 27 parts by weight of LBKP were beaten to obtain a polyamide-epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P130", 0.18 parts by weight of Dick Hercules Co., Ltd., 0.09 parts by weight of polyacrylic amide (trade name “Polymerset 500L”, manufactured by Arakawa Chemical Industry Co., Ltd.) were added and fixed, and a freeness of 550 ml C.I. S. F. And then fibrous CM
C (degree of etherification 0.4, trade name "Kickolate H
C ", manufactured by Nichirin Chemical Industry Co., Ltd.) and mixed with 10 parts by weight of paper stock, and NBKP63 as a water resistance imparting layer.
By weighting 27 parts by weight of LBKP and 0.9 parts by weight of a polyamide / epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P130" manufactured by Dick Hercules Co., Ltd.), polyacrylic amide (trade name "polymer" Set 500L ", manufactured by Arakawa Chemical Industry Co., Ltd. 0.
09 parts by weight, 1.35 parts by weight of a rosin sizing agent (trade name “Size Pine E”, manufactured by Arakawa Chemical Industry Co., Ltd.) were added, and a freeness of 550 ml C.I. S. F. And then mixed with 10 parts by weight of fibrous CMC (etherification degree 0.4, trade name "Kickolate HC", manufactured by Nichirin Chemical Industry Co., Ltd.) using a cylinder net multi-tank paper machine. , The basis weight of the water absorption imparting layer is 25 g / m 2 and the basis weight of the waterproofing imparting layer is 25 g
/ M2 was made into a paper, and a wipe paper having a finished basis weight of 50 g / m2 was produced.

Example 13 With the same formulation as in Example 12, only 0.9 part by weight of the wet paper strengthening agent in the water absorption imparting layer was used.

Example 14 As a water absorption imparting layer, 69.3 parts by weight of NBKP and LBK
P29.7 parts by weight is beaten, and a polyamide / epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P130", manufactured by Dick Hercules Co., Ltd.) 0.2
0.1 part by weight of polyacrylic amide (trade name "Polymerset 500L" manufactured by Arakawa Chemical Industry Co., Ltd.) was added to the freeness of 550 ml C.I. S. F. And then mixed with 1 part by weight of fibrous CMC (etherification degree 0.4, trade name “Kickolate HC”, manufactured by Nichirin Chemical Industry Co., Ltd.) and, on the other hand, as a water resistance imparting layer, N
63 parts by weight of BKP and 27 parts by weight of LBKP were beaten to obtain 0.9 parts by weight of a polyamide / epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P130" manufactured by Dick Hercules Co., Ltd.), polyacrylic amide (trade name " Polymer set 500L ", manufactured by Arakawa Chemical Industry Co., Ltd.) 0.09 parts by weight, rosin sizing agent (trade name" Size Pine E ", manufactured by Arakawa Chemical Industry Co., Ltd.) 2.
7 parts by weight were added to give a freeness of 550 ml C.I. S. F. And then fibrous CMC (etherification degree 0.4,
Product name "Kickolate HC", Nichirin Chemical Industry Co., Ltd.
Manufacture) Using a cylinder net multi-tank paper machine, a paper material mixed with 10 parts by weight is combined with a basis weight of the water absorption imparting layer of 25 g / m 2 and a basis weight of the waterproofing imparting layer of 25 g / m 2, to obtain a finished basis weight. 50 amount
A wiping paper of g / m 2 was made into a paper.

Example 15 As a water absorbing layer, 69.3 parts by weight of NBKP and LBK
P29.7 parts by weight is beaten, and a polyamide / epichlorohydrin resin-based wet paper strength agent (trade name "Epinox P130", manufactured by Dick Hercules Co., Ltd.) 1.0
0.1 part by weight of polyacrylic amide (trade name "Polymerset 500L" manufactured by Arakawa Chemical Industry Co., Ltd.) was added to the freeness of 550 ml C.I. S. F. And then mixed with 1 part by weight of fibrous CMC (etherification degree 0.4, trade name “Kickolate HC”, manufactured by Nichirin Chemical Industry Co., Ltd.) and, on the other hand, as a water resistance imparting layer, N
63 parts by weight of BKP and 27 parts by weight of LBKP were beaten to obtain 0.9 parts by weight of a polyamide / epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P130" manufactured by Dick Hercules Co., Ltd.), polyacrylic amide (trade name " Polymer set 500L ", manufactured by Arakawa Chemical Industry Co., Ltd.) 0.1 part by weight, rosin sizing agent (trade name" Size Pine E ", manufactured by Arakawa Chemical Industry Co., Ltd.) 1.
35 parts by weight was added, and the freeness was 550 ml C.I. S. F.
And then mixed with 10 parts by weight of fibrous CMC (etherification degree, trade name “Kickolate HC”, manufactured by Nichirin Chemical Co., Ltd.) using a cylinder net multi-tank paper machine to absorb water. The basis weight of the property imparting layer is 25 g / m 2 and the basis weight of the waterproofing layer is 25 g / m 2, and the finished basis weight is 50 g.
A wiping paper having a thickness of / m2 was produced.

Example 16 With the same formulation as in Example 15, only 3.0 parts by weight of the wet paper strengthening agent in the water absorption imparting layer was used.

Comparative Example 5 As a water absorption imparting layer, 70 parts by weight of NBKP and LBKP3
0 parts by weight was beaten, and a polyamide / epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P13
0 ", 0.2 part by weight of Dick Hercules Co., Ltd., polyacrylic amide (trade name" Polymer Set 50 ")
0L ", manufactured by Arakawa Chemical Industries Co., Ltd., 0.1 part by weight, and added to a freeness of 550 ml C.I. S. F. On the other hand, as a water resistance imparting layer, 63 parts by weight of NBKP,
27 parts by weight of LBKP was beaten, and a polyamide / epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P130" manufactured by Dick Hercules Co., Ltd.) was used.
9 parts by weight, polyacrylic amide (trade name "Polymerset 500L", manufactured by Arakawa Chemical Industry Co., Ltd.) 0.09 parts by weight, rosin sizing agent (trade name "Size Pine E", manufactured by Arakawa Chemical Industry Co., Ltd.) ) 1.35 parts by weight was added to the freeness 550 ml C.I. S. F. And then mixed with 10 parts by weight of fibrous CMC (0 etherification degree 0.4, trade name "Kickolate HC", manufactured by Nichirin Chemical Industry Co., Ltd.) to a cylinder net multi-tank paper machine. Was used to combine the basis weight of the water absorption imparting layer with 25 g / m 2 and the basis weight of the waterproofing imparting layer with 25 g / m 2 to produce a wipe paper having a finished basis weight of 50 g / m 2.

Comparative Example 6 As a water absorption imparting layer, 63 parts by weight of NBKP and LBKP2
7 parts by weight was beaten to give polyacrylic amide (trade name "Polymerset 500L", manufactured by Arakawa Chemical Industry Co., Ltd.).
09 parts by weight were added, and the mixture was fixed with a sulfuric acid band and had a freeness of 55.
0 ml C.I. S. F. And then fibrous CMC
(Degree of etherification 0.4, product name "Kickolate HC",
Nichirin Kagaku Kogyo Co., Ltd. (10 parts by weight) is mixed with a paper material, while NBKP (63 parts by weight) and LBKP (27 parts by weight) are beaten as a water resistance imparting layer, and a polyamide / epichlorohydrin resin-based wet paper strength enhancer (product) Name "Epinox P130", manufactured by Dick Hercules Co., Ltd.
0.9 parts by weight, polyacrylic amide (trade name "Polymer set 500L", manufactured by Arakawa Chemical Industry Co., Ltd.) 0.09
Parts by weight, rosin sizing agent (trade name "Size Pine E",
Arakawa Chemical Industry Co., Ltd.)) 1.35 parts by weight was added to give a freeness of 550 ml C.I. S. F. And then mixed with 10 parts by weight of fibrous CMC (etherification degree 0.4, trade name "Kickolate HC", manufactured by Nichirin Chemical Co., Ltd.) in a cylinder net multi-tank paper machine. The basis weight of the water absorption imparting layer is 25 g / m2 and the basis weight of the waterproofing imparting layer is 25 g / m2.
Was made into a paper, and a wipe paper having a finished basis weight of 50 g / m 2 was made.

Comparative Example 7 As the water absorption imparting layer, 69.7 parts by weight of NBKP and LBK
P29.8 parts by weight is beaten, and a polyamide / epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P130", manufactured by Dick Hercules Co., Ltd.) 1.0
0.1 part by weight of polyacrylic amide (trade name "Polymerset 500L" manufactured by Arakawa Chemical Industry Co., Ltd.) was added to the freeness of 550 ml C.I. S. F. And then fibrous CMC (degree of etherification 0.4, trade name "Kickolate HC", manufactured by Nichirin Chemical Co., Ltd.) 0.
On the other hand, 63 parts by weight of NBKP and 27 parts by weight of LBKP were beaten as a water resistance imparting layer, and a wet paper strengthening agent of a polyamide epichlorohydrin resin type (trade name "Epinox P130", Dick Hercules Manufactured by Co., Ltd. 0.9 parts by weight, polyacrylic amide (trade name "Polymerset 500L", manufactured by Arakawa Chemical Industry Co., Ltd.) 0.09 parts by weight, rosin sizing agent (trade name "Size Pine E", Arakawa) Chemical Industry Co., Ltd.))
1.35 parts by weight was added to give a freeness of 550 ml C.I. S.
F. And then mixed with 10 parts by weight of fibrous CMC (etherification degree 0.4, trade name "Kickolate HC", manufactured by Nichirin Chemical Co., Ltd.) in a cylinder net multi-tank paper machine. By using the basis weight of the water absorption imparting layer of 25 g / m2 and the basis weight of the waterproofing imparting layer of 25 g / m2, a wipe paper having a finished basis weight of 50 g / m2 was produced.

Comparative Example 8 As a water absorption imparting layer, 63 parts by weight of NBKP and LBKP2
7 parts by weight was beaten, and a polyamide / epichlorohydrin resin-based wet paper strength enhancer (trade name "Epinox P13
0 ", 0.9 part by weight manufactured by Dick Hercules Co., Ltd., polyacrylic amide (trade name" Polymer Set 50 ")
0L ”, manufactured by Arakawa Chemical Industry Co., Ltd., 0.09 parts by weight, and added to a freeness of 550 ml C.I. S. F. And then mixed with 10 parts by weight of fibrous CMC (etherification degree 0.4, trade name "Kickolate HC", manufactured by Nichirin Chemical Industry Co., Ltd.), and, on the other hand, as a water resistance imparting layer, N
28 parts by weight of BKP and 12 parts by weight of LBKP are beaten, and 0.4 parts by weight of a polyamide / epichlorohydrin resin-based wet paper strength agent (trade name "Epinox P130" manufactured by Dick Hercules Co., Ltd.), polyacrylic amide (trade name: " Polymer set 500L ", manufactured by Arakawa Chemical Industry Co., Ltd.) 0.04 parts by weight, rosin sizing agent (trade name" Size Pine E ", manufactured by Arakawa Chemical Industry Co., Ltd.)
6 parts by weight were added, and the freeness was 550 ml C.I. S. F. And then fibrous CMC (etherification degree 0.4,
Product name "Kickolate HC", Nichirin Chemical Industry Co., Ltd.
Manufacture) Using a cylinder net multi-tank paper machine, a paper material mixed with 60 parts by weight is used to make a basis weight of 25 g / m2 for the water absorption imparting layer and a basis weight of 25 g / m2 for the waterproofing imparting layer. 50 amount
A wiping paper of g / m 2 was made into a paper.

The evaluation results of Examples and Comparative Examples are shown in Tables 3 and 4.
Shown in.

[0046]

[Table 3]

[0047]

[Table 4]

Characteristic Evaluation Method The evaluation of the dimensional change when wet, the wet paper strength, the wet tensile strength, the cold water and hot water immersion water resistance, and the water decomposability are the same as those described above. Stoeckit sizing degree: The sample was cut into a square of 50 mm x 50 mm, the test piece was folded around the four sides, and placed in a Petri dish at 20 ± 1 ° C of 2% ammonium thiocyanate (JIS.
K9000) float on the solution and
% Of ferric chloride (JIS K8142 special grade) solution with a pipette and the time until three red spots appear is measured with a second clock.
It is expressed by IS P8122), and the evaluation shows that a practically usable range is 60 seconds or more.

As can be seen from Tables 1 to 4, the wiping papers of Examples 1 to 8 of the present invention have both wet paper strength and disintegration property. Stable dimensions when wet. Further, in addition to the above-mentioned characteristics, Examples 9 to 16 have a large size degree and further have a good permeation-preventing property for the object to be wiped. On the other hand, when the ratio of the fibrous CMC deviates from the scope of the claims as in the comparative example, only one of wet paper strength and water decomposability can be exhibited. Further, when the wet strength agent is not used, it has water-decomposability but does not have wet strength.

[0050]

EFFECTS OF THE INVENTION The present wiping paper, when used, has a fit when held in the hand, a property of preventing penetration of a material to be wiped, an appropriate dry strength and a wet strength, and is excellent in water resistance. After use, a small amount of alkaline liquid treatment will break the fiber bonds, and then by pouring in a large amount of water, it will easily decompose,
Can be flushed to the flush toilet.

Claims (5)

[Claims] 1. A wet paper strength enhancer is mixed with 50 to 99 parts by weight of papermaking fibers and 50 to 1 parts by weight of water-insoluble fibrous carboxymethylcellulose having a degree of etherification of 0.20 to 0.65. A wiping paper, characterized in that 0.1 to 3.0% by weight is added to the textile fibers and the paper is made into a paper having a basis weight of 15 to 200 g / m 2. 2. A wet paper strength enhancer is mixed with 50 to 99 parts by weight of papermaking fibers and 50 to 1 parts by weight of water-insoluble fibrous carboxymethylcellulose having an etherification degree of 0.20 to 0.65. 0.1 to 3.0% by weight with respect to the fibers for use,
A sheet prepared by adding a sizing agent to the papermaking fibers in an amount of 0.5 to 3.0% by weight and having a basis weight of 15 to 200 g / m 2
A wiping sheet laminated on the wiping sheet according to claim 1. 3. The wiping paper according to claim 1, wherein 85 to 97 parts by weight of the papermaking fiber and 15 to 3 parts by weight of water-insoluble fibrous carboxymethyl cellulose are mixed to produce a paper. 4. The wiping paper according to claim 1, wherein the water-insoluble fibrous carboxymethyl cellulose has an etherification degree of 0.25 to 0.40. 5. The finished basis weight of the wiping paper is 40 to
60 g / m @ 2, 3.
Wiping paper described in 3 and 4.