JP2010150718A - Processed paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide processed paper having excellent dimensional stability and releasability, in particular. <P>SOLUTION: The paper includes at least base paper and a coated layer. In the base paper, a blending ratio of mechanical pulp measured on the basis of a color identification table by a C staining method according to paper, board and pulp-fiber furnish analysis prescribed in JIS-P8120 (1998) is 40-70%. An inorganic pigment is internally added. An ash content rate measured according to JIS-P8251 (2003) is 10-30%. The coated layer is formed by coating a surface on one side of the base paper at least with a coating solution containing a water-soluble resin, and becomes blue in a color test employing tetrabromophenolphthalein potassium salt (TBP) prescribed in Papier28.101 (1974). <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a processed paper mainly used for a base material (backing paper) such as vinyl wallpaper and paper wallpaper, and particularly relates to a processed paper having excellent dimensional stability and excellent peelability.

  The wallpaper is composed of a backing paper for wallpaper and a surface material made of a synthetic resin such as vinyl chloride resin or olefin resin applied, dried and adhered to the backing paper for wallpaper. Such wallpaper is pasted to the wall with water-based glue such as starch or vinyl acetate resin when the wallpaper is pasted on the wall (at the time of wallpaper construction). At this time, the dimensional stability of the backing paper for wallpaper If it is not good, there is a problem that the backing paper for wallpaper shrinks and an opening is formed in the joint portion of the wallpaper.

  Also, since many of the wallpaper replacement work is done manually, if the resistance to peeling is high, the wallpaper will be difficult to peel off, and the marks will remain unevenly on the wall, requiring time to correct the groundwork. It will be inefficient. Therefore, the wallpaper is required to be easily peeled off when the wallpaper is replaced by renovation or the like, and the paper layer of the wallpaper backing paper remaining on the wall surface after the peeling is required to have a uniform thickness.

  In Patent Document 1, when the content of the thermoplastic synthetic fiber in the fiber is adjusted to a predetermined range and a fatty acid amine resin and / or a fatty acid amide resin is contained, the wallpaper is applied to the wall (wallpaper construction). In addition to being hard to curl the wallpaper even after applying glue, the paper will not open after application, and will be easy to remove when replacing the wallpaper, and the backing paper that will remain on the wall after removal A wallpaper backing paper having a uniform layer thickness is disclosed. However, the backing paper for wallpaper described in Patent Document 1 can be peeled off with a uniform thickness on the backing paper layer, but the thickness of the paper layer remaining on the wall surface is thick, the amount is large, or The thickness of the paper layer was thin and the amount was small and nonuniform. For this reason, there was a problem that the amount of glue had to be adjusted each time the wallpaper was constructed again.

  Patent Document 2 contains polyamide epichlorohydrin resin, and by maintaining the surface roughness and smoothness of the paper surface within a predetermined range, while maintaining the dimensional stability and gravure printing suitability that are characteristic of Yankee paper, A backing paper for wallpaper produced by a paper machine equipped with a Yankee dryer has been disclosed which has improved dam leakage during coating of vinyl chloride / olefin resin and the like. However, glossy kraft paper such as Yankee paper has a problem of dripping compared to both types of kraft paper, and although the paper layer of the backing paper can be peeled at a uniform thickness, it peels off on the wall surface. There was a problem that the thickness and amount of the remaining layer could not be made uniform.

  Further, in Patent Document 3, a predetermined amount of mechanical pulp is blended, a predetermined amount of filler is added, and a thermal conductivity is set within a predetermined range, so that dimensional stability and concealment are high, and wallpaper peeling is further performed. A backing paper for wallpaper having improved properties is disclosed. However, even with this wallpaper backing paper, as described above, there is a problem that the amount of glue must be adjusted each time the wallpaper is applied again.

  Furthermore, Patent Document 4 discloses a processed paper used for wallpaper backing paper, which is improved in dimensional stability by adding specific mica and prevents reduction in paper strength, interlayer strength, and sizing degree. It is disclosed. However, as described above, the processed paper described in Patent Document 4 is also difficult to remove so that the paper layer has a uniform thickness when the wallpaper is removed when the wallpaper is replaced. There was a problem that the amount of glue had to be adjusted each time.

JP 2007-77526 A Japanese Patent No. 4049387 Japanese Patent No. 4016057 JP 2008-88579 A

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a processed paper that is particularly excellent in dimensional stability and peelability.

  The above object of the present invention comprises at least a base paper and a coating layer, and the base paper is a C dyeing method according to the paper, paperboard and pulp-fiber composition test method specified in JIS-P8120 (1998). The blending ratio of the mechanical pulp measured based on the color table according to the above is 40 to 70%, an inorganic pigment is internally added, and the ash content measured according to JIS-P8251 (2003) is 10 to 30%. And the coating layer is formed by applying a coating solution containing a water-soluble resin to at least one surface of the base paper. Further, the tetrabromophenol lid described in Papier 28.101 (1974) This is achieved by providing a processed paper characterized by being colored blue in a color test using rain ethyl ester potassium salt (TBP).

  In addition, the above object of the present invention is that the water-soluble resin contains a fatty acid ester compound. Fenchell water elongation according to No. 27 is 1.5% to 3.0%, and the wet tensile strength (longitudinal) residual rate measured according to JIS-P8135 (1998) is 10% to 25%. This is effectively achieved by providing a processed paper characterized by being.

  Still further, the object of the present invention is to provide the base paper with JAPAN TAPPI No. 1, wherein the inorganic pigment is a calcined clay. It is divided into two layers by a peeling method according to No. 18, and the ash content ratio of the other layer is 1 to 4 when the ash content ratio of the layer having a small ash content is 1, and the above 2 By providing a processed paper characterized in that, among the base papers divided into layers, the weight ratio of the other layer is 1 to 2.3 when the weight ratio of the layer having a small weight is 1. Achieved more effectively.

  The processed paper according to the present invention comprises at least a base paper and a coating layer, and the base paper is a paper, paperboard and pulp-fiber composition test method specified in JIS-P8120 (1998). The blending ratio of the mechanical pulp measured based on the coloring table according to the C dyeing method according to the above is 40 to 70%, an inorganic pigment is internally added, and the ash content ratio measured according to JIS-P8251 (2003) is 10 to 10. The coating layer is formed by applying a coating liquid containing a water-soluble resin to at least one surface of the base paper, and further, tetrabromophenol phthalate described in Papier 28.101 (1974). In the color test using rain ethyl ester potassium salt (TBP), the color is blue, so that the dimensional stability and peelability are excellent. That is, when the processed paper according to the present invention is used, for example, as a wallpaper backing paper, the occurrence of openings is small, and it is easy to peel off when wallpaper is removed by renovation, etc., and the backing paper remaining on the wall surface The layer can be made to have a uniform thickness, and the workability of changing wallpaper can be improved.

  Hereinafter, the processed paper according to the present invention will be described in detail. The processing sheet according to the present invention is not limited to the following embodiment, and it is needless to say that the configuration can be changed as appropriate without departing from the scope of the claims.

The processed paper according to the present invention includes at least a base paper and a coating layer.
The raw material pulp used for the base paper of the processed paper according to the present invention is virgin chemical pulp (hardwood bleached kraft pulp, softwood bleached kraft pulp, pulp obtained by chemically treating other fiber raw materials), especially hardwood bleached kraft pulp. In addition to this, after chemical solution is impregnated into wood or chips, chemi-ground pulp, chemimechanical pulp and chips that have been mechanically pulped are digested until they become slightly soft, and then pulped with a refiner. Virgin pulp such as semi-chemical pulp may be included.

  In addition to the above-mentioned raw pulp, high-quality paper, high-quality coated paper, medium-quality paper, medium-quality coated paper, reprinted paper, flat plate, letterpress, intaglio printing, electrophotographic method, heat-sensitive method, thermal transfer method, pressure-sensitive Recording paper, ink-jet recording system, waste paper printed with carbon paper, waste paper written with water-based, oil-based ink or pencil, waste paper such as newspaper waste paper, deinked pulp (DIP), paper sludge, paper mill wastewater Scum or the like can be used. In other words, the White Paper, Cream White, Ruled White, Card, White, Medium White, White Manila, Imitation, Color, Kent, White Art, Beverage Pack, Office Paper, Special Cutting, separate cutting, medium antique, Kent Manila, newspaper, miscellaneous paper, cut tea, plain tea, miscellaneous tea, craft corrugated cardboard, corrugated cardboard, wamp, top mount, mount, ball, etc. can be used.

  Among the raw material pulps, mechanical pulp is preferable. As mechanical pulp, groundwood pulp (GP), pressure-rise ground pulp (PGW), refiner groundwood pulp (RGP), thermomechanical pulp (TMP), chemithermomechanical pulp (CTMP), etc. can be used. It is preferable to use mechanical pulp (TMP), more preferably bleached thermomechanical pulp (BTMP).

  Further, the base paper of the processed paper according to the present invention is a blend of mechanical pulp measured based on a color table by a C-dyeing method according to the paper, paperboard and pulp-fiber composition test method specified in JIS-P8120 (1998). The rate (hereinafter referred to as “mixing rate of mechanical pulp”) is 40 to 70%, preferably 50 to 60%. In order to adjust the distribution of the ash content in the paper layer of the base paper, there are methods for adjusting the dehydration power at the wire part and using vacuum such as a suction box and a suction roll. By prescribing the blending ratio, the paper layer of the processed paper (backing paper) remaining on the wall surface after peeling can be made uniform when the wallpaper is peeled off. In addition, when the blending ratio of mechanical pulp is less than 40%, there are too many paper layers remaining on the wall surface after peeling, and problems such as taking time to correct the base occur. On the other hand, if the blending ratio of mechanical pulp exceeds 70%, the paper layer remaining on the wall surface after peeling becomes too small, and it becomes difficult to obtain a uniform thickness.

  In the processed paper of the present invention, among mechanical pulps, BTMP is particularly preferably blended in an amount of 40 to 70% by weight, and more preferably in a range of 50 to 60% by weight. Since many resin components remain in BTMP, inorganic pigments internally added between pulp fibers are likely to enter. For this reason, it has the function which prevents the fiber which carried out drying shrinkage | swelling in water, and controls the Fenchell underwater elongation mentioned later. Further, the distribution of the inorganic pigment in the paper layer of the base paper of the processed paper according to the present invention can be easily controlled by the dehydration force applied from the outside. If the blending amount of BTMP is less than 40% by weight, the thickness of the base paper of the processed paper tends to decrease. Therefore, when the wallpaper using this processed paper as the backing paper is peeled off, the processing remaining on the wall surface It is difficult to make the paper layer of the paper uniform thickness. On the other hand, if the blending amount of BTMP exceeds 70% by weight, the amount of fine fibers increases and the tensile strength of the processed paper decreases, so that secondary processing such as coating of vinyl chloride resin is applied to such processed paper. In application, there is a tendency that a paper-cutting trouble tends to occur, which is not preferable.

The base paper of the processed paper according to the present invention contains an inorganic pigment. Examples of the inorganic pigment include talc (3MgO · 4SiO ₂ · H ₂ O), clay (including modified clay such as calcined clay and chemically modified clay), heavy calcium carbonate, light calcium carbonate, titanium dioxide, aluminum hydroxide. , Barium sulfate, calcium sulfate, zinc sulfide, satin white, kaolin, silica (SiO ₂ or SiO ₂ .nH ₂ O), and the like. Among these inorganic pigments, it is more preferable to use a porous baked clay because it can suppress the generation of blisters.

  Furthermore, the processed paper according to the present invention preferably contains 10 to 30% by weight, more preferably 15 to 25% by weight of an inorganic pigment. That is, the base paper of the processed paper according to the present invention has an ash content measured according to JIS-P8251 (2003) of 10 to 30%, more preferably 15 to 25%. When the content of the inorganic pigment is less than 10% by weight, for example, in the vinyl wallpaper manufacturing process, from the side where the coating layer is not provided in the drying process when the vinyl chloride resin is applied to the surface of the processed paper Moisture does not easily escape and blisters are likely to occur. In the present invention, a porous pigment is suitable among the inorganic pigments. In this case, if the content of the inorganic pigment is less than 10% by weight, the amount of water adsorbed in the hollow of the porous pigment tends to decrease. Therefore, due to changes in humidity and temperature, the buffering action against changes in moisture absorption repeatedly decreases, and the dimensional stability tends to decrease. On the other hand, when the content of the inorganic pigment exceeds 30% by weight, the problem of blistering and the dimensional stability tend to be satisfied, but the interlayer strength of the base paper becomes weak. For this reason, when the processed paper according to the present invention is used as a backing paper for wallpaper, it becomes difficult to leave a wall having a uniform thickness on the wall surface when the wallpaper is removed by wallpaper replacement or the like.

  In addition, by adding a sizing agent to the base paper of the processed paper according to the present invention, the dimensional stability and the peelability can be more effectively improved. Various sizing agents such as rosin sizing agent, synthetic sizing agent, alkenyl succinic anhydride (ASA), and alkyl ketene dimer (AKD) can be used. Among these, synthetic sizing agent is used. It is preferable to do. Furthermore, various well-known internal additives such as fillers, paper strength agents, wet paper strength agents, colorants, and fixing agents may be added.

  In the processed paper according to the present invention, a coating layer containing a water-soluble resin is applied to at least one surface of the above-described base paper to form a coating layer.

  The addition amount of the water-soluble resin is 0.2 to 1.5% by weight, preferably 0.5 to 1.0% by weight in terms of pulp solid content. When the water-soluble resin is added in an amount of less than 0.2% by weight, starch or acetic acid used when the wallpaper is applied to the wall (at the time of wallpaper construction) in the wallpaper in which the processed paper according to the present invention is used as the backing paper Since water-based glue such as vinyl resin (hereinafter simply referred to as “glue”) is likely to permeate, the peelability is lowered. In other words, when peeling the wallpaper by changing the wallpaper, etc., the peeling resistance when peeling the wallpaper increases, making it difficult to peel off, and it becomes difficult to make the layer of processed paper remaining on the wall surface uniform thickness Become. On the other hand, when the addition amount of the water-soluble resin exceeds 1.5% by weight, the adhesive used at the time of wallpaper construction is difficult to penetrate, so that the peelability is good, but the adhesive force between the wallpaper and the wall tends to decrease. And the wallpaper is easy to peel off.

  Examples of the water-soluble resin used in the present invention include starch, modified starch, polyvinyl alcohol, casein, carboxymethyl cellulose, acrylic resin, acrylamide, polyester, and fatty acid ester compound. Among these, a water-soluble resin containing a fatty acid ester compound is particularly preferable. In addition, it is preferable to use the violet resin 7200A by Taoka Chemical Co., Ltd. as a fatty acid ester compound.

That is, the fatty acid ester compound used in the present invention is obtained by the reaction of component (a): (poly) alkylene glycol monoalkyl ether, component (b): aliphatic dicarboxylic acid, and component (c): (poly) alkylene glycol. A resin plasticizer containing the obtained compound (A) and an aliphatic ester compound (B) having a molecular weight of 100 to 500, a compound (A ′) represented by the following (formula 1), and a molecular weight of 100 It is a resin composition containing the plasticizer for resin containing -500 aliphatic ester compounds (B).
(Formula 1)
R1- (OR2) m-OCO-R3-CO- [O- (R4O) n-CO-R3'-CO] k-O- (R2'O) m'-R1 '
[In the formula (1), R1 and R1 ′ are hydrogen atoms and alkyl groups having 1 to 16 carbon atoms (however, R1 and R1 ′ are not hydrogen atoms), R2, R2 ′ and R4 are carbon atoms. A C1-C8 alkylene group, R3, R3 'is a C1-C12 alkylene group or alkenylene group, k is an integer of 1-10, n, m, m' represents an integer of 1-50. ]
The compound (A) or (A ′) has good compatibility with the paste, is excellent in bleedability, has little bleed out, and can provide a transparent and flexible resin composition. However, depending on the use of the resin composition, such as a thin film, further flexibility is required, and a plasticizer for resin having higher plasticity is required. On the other hand, the aliphatic ester compound (B) is excellent in plasticity and can obtain a flexible resin composition, but it cannot be said that the compatibility with the paste and the bleeding property are sufficient, and it is used only for limited applications. Can not.

  Therefore, in the present invention, the compound (B) excellent in compatibility between the compound (A) or (A ′) excellent in compatibility with paste and bleeding property and the plasticity and the compound (A) or (A ′). And mixed use. Thereby, since the bleed-out of the compound (B) is suppressed as compared with the case where the compound (B) is used alone, the bleeding property is improved, and the compound (A) or (A ′) is used alone. Compared with the case, the plasticity is further improved. Accordingly, a resin composition with less bleeding out of the plasticizer for the resin than in the prior art, excellent transparency and flexibility, and little change in physical properties with time can be obtained. A processed paper with less generation can be obtained.

  As described above, the compound (A) comprises an esterification reaction of component (a): (poly) alkylene glycol monoalkyl ether, component (b): aliphatic dicarboxylic acid, and component (c): (poly) alkylene glycol. Is obtained.

  Specific examples of the component (a) (poly) alkylene glycol monoalkyl ether include ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, polyethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol mono Ethyl ether, triethylene glycol monoethyl ether, polyethylene glycol monoethyl ether, ethylene glycol monopropyl ether, diethylene glycol monopropyl ether, triethylene glycol monopropyl ether, polyethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, triethyl Glycol monobutyl ether, polyethylene glycol monobutyl ether, ethylene glycol monohexyl ether, diethylene glycol monohexyl ether, triethylene glycol monohexyl ether, ethylene glycol monooctyl ether, diethylene glycol monooctyl ether, triethylene glycol monooctyl ether, ethylene glycol mono- 2-ethylhexyl ether, diethylene glycol mono-2-ethylhexyl ether, triethylene glycol mono-2-ethylhexyl ether, ethylene glycol monodecyl ether, diethylene glycol monodecyl ether, diethylene glycol monolauryl ether, diethylene glycol monomyristyl ether, diethylene glycol Ethylene glycol monoalkyl ethers such as coal monocetyl ether, propylene glycol monomethyl ether, dipropylene glycol monomethyl ether, tripropylene glycol monomethyl ether, polypropylene glycol monomethyl ether, propylene glycol monoethyl ether, dipropylene glycol monoethyl ether, tripropylene Glycol monoethyl ether, polypropylene monoethyl ether, propylene glycol monopropyl ether, dipropylene glycol monopropyl ether, tripropylene glycol monopropyl ether, polypropylene monopropyl ether, propylene glycol monobutyl ether, dipropylene glycol monobutyether, tripropylene glycol Examples include propylene glycol monoalkyl ethers such as coal monobutyl ether and polypropylene monobutyl ether, butylene glycol monomethyl ether, and hexylene glycol monomethyl ether. In addition, these may be used independently and may be used in combination of 2 or more types. Among these, ethylene glycol monoalkyl ethers are preferable because they have good compatibility with plastics used during wallpaper construction and plasticity.

  Specific examples of the aliphatic dicarboxylic acid as component (b) include malonic acid, methylmalonic acid, ethylmalonic acid, dimethylmalonic acid, succinic acid, methylsuccinic acid, 2,2-dimethylsuccinic acid, 2 , 2,3-Trimethylsuccinic acid, 2ethyl-2methyl-succinic acid, glutaric acid, 2-methylglutaric acid, 2,2-dimethylglutaric acid, 2,4-dimethylglutaric acid, 3,3-dimethylglutaric acid Adipic acid, 3-methyladipic acid, 2,2-dimethyladipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, 1,3-cyclopentanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid 1,3-cyclohexanedicarboxylic acid, fumaric acid, maleic acid, and the like, lower alkyl esters thereof, and acid anhydrides It can be used as well. In addition, these may be used independently and may be used in combination of 2 or more types. Among these, malonic acid, succinic acid, adipic acid, fumaric acid, and maleic acid are preferable because they have good compatibility with plastics used during wallpaper construction and plasticity.

  Furthermore, as the component (c) (poly) alkylene glycol, specifically, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, 1, 3-propanediol, 2,2-dimethyl-1,3-propanediol, 1,4-butanediol, 1,3-butanediol, 1,2-butanediol, 1,5-pentanediol, neopentyl glycol, Examples include 1,6-hexanediol, 1,2-hexanediol, and octanediol. In addition, these may be used independently and may be used in combination of 2 or more types. Among these, ethylene glycols, particularly (poly) ethylene glycol having a molecular weight of 1000 or less are preferable because of their good compatibility with plastics used during wallpaper construction and plasticity.

  In the fatty acid ester compound used in the present invention, the target esterification reaction product, that is, the above-described compound (A) can be obtained by appropriately selecting the amounts of the components (a) to (c) used.

  In addition, the manufacturing method of a compound (A) is not specifically limited. That is, it may be a one-stage method in which all components are reacted at the same time, or a multi-stage method in which the components (b) and (c) are reacted and then the components (a) are reacted. Further, these reactions can be carried out by a known esterification reaction method. That is, for example, at a temperature of 100 ° C. to 300 ° C., in the presence or absence of a known esterification catalyst such as sulfuric acid and paratoluenesulfonic acid, and in the presence of a solvent such as toluene and xylene as necessary. The esterification reaction is carried out while removing generated water out of the system. During the esterification reaction, if air is mixed, there is a risk of coloring, so it is desirable to carry out in an inert gas atmosphere such as nitrogen or helium or in an air stream. In addition, after the reaction, purification treatment such as washing and adsorption can be performed as necessary.

Next, the compound (A ′) represented by the above (Formula 1) will be described.
In (Formula 1), R 1 and R 1 ′ are each a hydrogen atom, a linear or branched alkyl group having 1 to 16 carbon atoms, preferably 1 to 10 carbon atoms, more preferably 1 to 6 carbon atoms, and the same. Or R1 and R1 ′ may not be hydrogen atoms. In view of compatibility with the paste and plasticity, alkyl groups are particularly preferred for both R1 and R1 ′. If the carbon number is larger than 16, the compatibility with the paste used for wallpaper construction is poor, the bleedout of the plasticizer for the resin of the resin composition increases, and further, the paste is kneaded and the paste is used for wallpaper construction. There is a problem that it is difficult to perform the work of applying and applying the coating uniformly (hereinafter referred to as “construction work”). In general, an alkyl group is preferably a straight chain structure because it has better biodegradability.

  Moreover, in (Formula 1), R2, R2 ′ and R4 are each a linear or branched alkylene group having 1 to 8 carbon atoms, preferably 1 to 4 carbon atoms, more preferably 1 or 2 carbon atoms, They may be the same or different. When the number of carbon atoms is larger than 8, the compatibility with the paste is poor, the bleedout of the plasticizer for the resin of the resin composition is increased, and furthermore, there are problems such as difficulty in kneading and construction work, which is not preferable. In addition, the alkylene group is preferably a straight chain structure because the plasticizer for resin has less bleed out, but if the crystallinity is high, it may be better to have a partly branched structure.

  In (Formula 1), R3 and R3 ′ are each a linear or branched alkylene group having 1 to 12 carbon atoms, preferably 1 to 8 carbon atoms, more preferably 1 to 4 carbon atoms, or an alkenylene group. Yes, they may be the same or different. If the carbon number is greater than 12, the compatibility with the paste is poor, the bleed-out of the plasticizer for the resin of the resin composition increases, and further problems such as difficulty in kneading and construction work occur. Since the transparency of a liquid may deteriorate, it is not preferable.

  Moreover, in (Formula 1), k is an integer of 1-10, Preferably it is an integer of 1-5. Although there is a difference depending on the structure of R3 ′ and R4 and the number of n, if k is larger than 10, the flexibility of the resin composition is lowered and sufficient plasticity cannot be obtained, or the crystallinity is high and is around room temperature. It is not preferable because it may crystallize.

  Furthermore, in (Formula 1), n, m and m ′ are each an integer of 1 to 50, preferably 1 to 25, which may be the same or different. Although there are differences depending on the structures of R2, R2 ′, and R4, if n, m, and m ′ are each greater than 50, the compatibility with the paste is poor, and the bleedout of the plasticizer for the resin of the resin composition increases. Furthermore, it is not preferable because problems such as difficulty in performing kneading and construction work may occur, or the flexibility of the resin composition may be reduced and sufficient plasticity may not be obtained. Furthermore, 4 ≦ n + m + m ′ ≦ 150 is preferable because any one of n, m and m ′ is 2 or more because crystallization is difficult and flexibility is improved.

  The method for producing the compound (A ′) represented by (Formula 1) is not particularly limited. That is, it may be produced by a known esterification reaction method using components (a) to (c), or may be produced by a known cleavage reaction method using an aliphatic carboxylic acid and a cyclic ether. Also good. More specifically, for example, the reaction can be performed under a pressurized condition as necessary in the presence of a catalyst such as an alkali metal hydroxide or an alkoxide at a temperature of 100 ° C. to 200 ° C.

  The molecular weights of the compounds (A) and (A ′) described above are not particularly limited, but are 300 to 10,000, preferably 400 to 4000, more preferably 500 to 2000, and the compound (B ) Higher molecular weight is desirable. If the molecular weight is too small, bleeding out of the resin plasticizer of the resin composition tends to increase, whereas if the molecular weight is too large, sufficient plasticity tends not to be obtained.

  Next, the aliphatic ester compound (B) used for the fatty acid ester compound will be described. The aliphatic ester compound (B) has a molecular weight of 100 to 500, preferably 300 to 500, is excellent in paste plasticity, and is excellent in compatibility with the compounds (A) and (A ′). Can be used. When the molecular weight of the compound (B) is larger than 500, sufficient plasticity cannot be obtained. On the other hand, when the molecular weight is smaller than 100, the volatility is high and the bleedout of the plasticizer for the resin increases, and the compound (A) or (A The mixed use effect with ') is not sufficiently obtained, which is not preferable.

  Examples of such aliphatic ester compounds (B) include aliphatic polycarboxylic acid esters, aliphatic oxyacid esters, aliphatic ether polycarboxylic acid esters, and glycerin esters. is not. Moreover, these may be used independently and may be used in combination of 2 or more types.

  The aliphatic polycarboxylic acid ester refers to an ester compound composed of a saturated or unsaturated aliphatic polyvalent carboxylic acid and an aliphatic alcohol. Specifically, dimethyl succinate, diethyl succinate, dibutyl succinate, diisobutyl succinate, di-2-ethylhexyl succinate, diisononyl succinate, diisodecyl succinate, dimethyl adipate, dibutyl adipate, diisobutyl adipate, adipic acid Di-2-ethylhexyl, diisononyl adipate, diisodecyl adipate, di-n-alkyl adipate (610), dibutyl sebacate, di-2-ethylhexyl sebacate, dibutyl azelate, di-2-ethylhexyl azelate, dodecane Examples thereof include di-2-ethylhexyl diacid, dibutyl maleate, di-2-ethylhexyl maleate and the like. These may be used alone or in combination of two or more.

  Specific examples of aliphatic oxyacid esters include ethyl acetylricinoleate, butyl acetylricinoleate, diethyl acetylmalate, dibutyl acetylmalate, dihexyl acetylmalate, di-2-ethylhexyl acetylmalate, diisononyl acetylmalate Acetyl tricitrate, tributyl acetyl citrate, trihexyl acetyl citrate and the like. These may be used alone or in combination of two or more.

  The aliphatic ether polyvalent carboxylic acid ester refers to an ester compound composed of a saturated or unsaturated aliphatic polyvalent carboxylic acid and an aliphatic ether derivative. Specifically, bismethylethylene glycol succinate, bismethyldiethylene glycol succinate, bismethyltriethylene glycol succinate, bisethylethylene glycol succinate, bisethyldiethylene glycol succinate, bisethyltriethylene glycol succinate, bisbutylethylene glycol Succinate, bisbutyldiethylene glycol succinate, bisbutyltriethylene glycol succinate, bishexyl ethylene glycol succinate, bishexyl diethylene glycol succinate, bishexyl triethylene glycol succinate, bismethylethylene glycol adipate, bismethyldiethylene glycol adipate, bis Methyltriethylene glycol adip Bisethylethylene glycol adipate, bisethyldiethylene glycol adipate, bisethyltriethylene glycol adipate, bisbutylethylene glycol adipate, bisbutyldiethylene glycol adipate, bisbutyltriethylene glycol adipate, bishexylethylene glycol adipate, bishexyl diethylene glycol adipate, bishexyl Examples include triethylene glycol adipate. These may be used alone or in combination of two or more.

  Specific examples of the glycerin ester include fatty acid monoglyceride, fatty acid diglyceride, fatty acid triglyceride, glycerin acetic acid fatty acid ester, and glycerin acetic acid ester. These may be used alone or in combination of two or more.

  Of these aliphatic ester compounds, aliphatic oxyacid esters and aliphatic ether polyvalent carboxylic acid esters are preferred, and in particular, acetyl triethyl citrate, acetyl tributyl citrate, bisethylethylene glycol succinate, bisethyldiethylene glycol succinate. Bisethyltriethylene glycol succinate, bisbutyldiethylene glycol succinate, bisbutyltriethylene glycol succinate, bisethylethylene glycol adipate, bisethyldiethylene glycol adipate, bisethyltriethylene glycol adipate, bisbutyldiethylene glycol adipate, bisbutyltriethylene Glycol adipate has good paste plasticity and compatibility with compound (A) or (A ′) Preferred.

  The mixing weight ratio of [compound (A) or compound (A ′)] / [aliphatic ester compound (B)] of the fatty acid ester compound used in the present invention is not particularly limited, but is 99/1. 10/90, preferably 95/5 to 30/70, more preferably 95/5 to 50/50.

  Furthermore, although the property of the plasticizer for resin of the fatty acid ester compound used in the present invention is not particularly limited, the compound (A) or (A ′) and the aliphatic ester compound (B) are usually mixed. Sometimes at least 100 ° C., preferably 50 ° C., more preferably 30 ° C., in a liquid or paste state.

  Further, as a water-soluble resin contained in the coating liquid applied to at least one side of the base paper of the processed paper according to the present invention, a wet paper strength enhancer containing an epochrylhydrin resin in addition to the fatty acid ester compound described above. Etc. may be further added. Thereby, the Fenchell underwater elongation mentioned later can be controlled.

  In addition to the water-soluble resin described above, polyvinyl alcohol (PVA), polyacrylamide (PAM), and the like can be used as the coating liquid within a range that does not affect the effects of the present invention. Further, for example, a lubricant, a sizing agent, a filler dispersant, a pH adjuster, a thickener, a fluidity improver, an antifoaming agent, an antifoaming agent, a release agent, a penetrating agent, a coloring dye, a coloring pigment, an ultraviolet absorber, You may add well-known additives, such as antioxidant, antiseptic | preservative, antibacterial agent, water-proofing agent, and fluorescence quencher, individually or in mixture of 2 or more types.

  As described above, the blending ratio of mechanical pulp and the ash content by addition of inorganic pigment are defined, and a coating layer containing a water-soluble resin is applied to form a coating layer on at least one side of the base paper. Thus, the processed paper according to the present invention can be colored blue in a color test using tetrabromophenolphthalein ethyl ester potassium salt (TBP) described in Papier 28.101 (1974). Thereby, use of the wet paper strength enhancer containing an epochrylhydrin resin can be confirmed.

  Moreover, by defining the addition amount of the water-soluble resin containing the fatty acid ester compound as described above, JAPAN TAPPI No. Wet tensile strength (longitudinal) measured in accordance with JIS-P8135 (1998), wherein the elongation in water according to No. 27 is 1.5 to 3.0%, preferably 1.5 to 2.0% The residual ratio can be 10 to 25%, preferably 12 to 20%, and the object of the present invention can be achieved efficiently.

  When the Fenchell underwater elongation is less than 1.5%, for example, in the process of producing vinyl wallpaper using the processed paper according to the present invention as the backing paper, the vinyl chloride resin is processed paper (wallpaper backing paper). It becomes difficult to penetrate. On the other hand, if the Fenchell water elongation exceeds 3.0%, the processed paper shrinks when absorbing the paste used during the construction of the wallpaper, which tends to cause unevenness, and the opening of the wallpaper tends to occur. .

  Further, when the wet tensile strength (longitudinal) residual ratio is less than 10%, for example, when producing a vinyl wallpaper using the processed paper according to the present invention as a backing paper, it is interrupted in the step of applying a vinyl chloride resin. It becomes a cause of paper trouble. On the other hand, if it exceeds 25%, it becomes difficult to recycle the processed paper according to the present invention, and the processing cost becomes high.

  Further, calcined clay is used as the inorganic pigment, and the above-mentioned predetermined amount is contained. As a result, the base paper of the processed paper according to the present invention is designated as JAPAN TAPPI No. The ash content of each layer is measured by dividing into two layers by a peeling method according to No. 18, and when the ash content ratio of the layer with the smaller ash content is 1, the ash content ratio of the other layer is The layer of processed paper remaining on the wall surface is uniform when the wallpaper using the processed paper according to the present invention as a backing paper is peeled off by adjusting to 1-4, preferably 1.1 to 1.5. Thickness. When the ash content ratio is less than 1, the difference in ash content between the two layers is small. Therefore, when processing paper is used as wallpaper and peeling is performed by changing the wallpaper, the layer of processed paper remaining on the wall surface is uniform. It becomes difficult to make it thick. On the other hand, if the ash content ratio exceeds 4, the difference in the ash content between the two layers increases, so that the peelability of the processed paper is improved, but the front and back difference of the processed paper increases, so the dimensional stability decreases. However, there is a problem that curling occurs when the glue used for wallpaper construction is applied, and there is a problem that an opening occurs after the glue is dried.

  Furthermore, as described above, the ratio of the ash content divided into two layers is defined, and the coating amount of the water-soluble resin containing the fatty acid ester compound is defined, whereby the base paper of the processed paper according to the present invention is made into JAPAN TAPPI No. . The weight of each layer is measured by dividing into two layers by a peeling method according to No. 18, and when the weight ratio of the layer with the smaller weight is 1, the weight ratio of the other layer is 1-2. .3, and preferably by adjusting to be 1 to 1.5, good peelability, which is the object of the present invention, can be obtained. That is, it is possible to reduce the peeling resistance when peeling the wallpaper using the processed paper according to the present invention as wallpaper backing paper, and it is easy to peel off, and the paper layer of the base paper of the processed paper remaining on the wall surface after peeling The thickness can be made uniform, and the work of replacing the wallpaper can be improved.

  In addition, the base paper of the processed paper according to the present invention as described above is composed of pulp and filler as main raw materials, and a slurry to which necessary chemicals are added as appropriate. The paper machine is not particularly limited, and any of an acidic papermaking method, a neutral papermaking method, and an alkaline papermaking method may be used. Further, the drying step may be any of a normal multi-cylinder dryer, a Yankee dryer, etc., but in particular, by using a Yankee dryer, it is possible to obtain a processed paper having superior dimensional stability than a drying method using a multi-cylinder dryer. . The drying method using a Yankee dryer is different from the drying method using a general multi-cylinder dryer, and wet paper is applied to the cylinder surface for drying. This reduces the shrinkage of the paper during drying, and the processed paper is lined for wallpaper. When used as a paper and coated with a water-based glue at the time of bonding to a wall, the paper does not stretch easily, has excellent dimensional stability, and can be particularly suitable for use as a backing paper for wallpaper.

  In addition, as a method of applying the coating liquid to the surface of at least one side of the base paper, it is applied by a known application means such as calendar coating, bar coater, rod coater, air knife, gate roll coater, 2 roll size press. Can do. Among these, it is preferable to apply with a transfer type gate roll.

  The paper layer configuration of the processed paper according to the present invention described in detail above may be a single layer or may be formed of a plurality of layers of two or more layers.

  In order to confirm the effect of the processed paper according to the present invention, the following various samples were prepared, and a test for evaluating the quality of each sample was performed. In addition, in a present Example, the numerical value which shows a mixing | blending, a density | concentration, etc. is a numerical value of the solid content or the mass reference | standard of an active ingredient. Moreover, since the pulp, chemical | medical agent, etc. which are shown in a present Example are only examples, it cannot be overemphasized that this invention is not restrict | limited by these Examples, and can be selected suitably.

  For comparison with 19 types of processed paper according to the present invention (referred to as “Example 1” to “Example 19”) and these Examples 1 to 19, four types of processed paper (this) Are made as “Comparative Example 1” through “Comparative Example 4”).

Example 1
Mixing 50% by weight of mechanical pulp BTMP (pulp freeness 140cc), 20% by weight of LBKP (pulp freeness 600cc) and 30% by weight of NBKP (pulp freeness 650cc) to adjust the disaggregation freeness to 385cc. The fired clay is added as an inorganic pigment to the raw pulp so that the ash content of the base paper of the resulting processed paper is 20%. Furthermore, as a sizing agent, a synthetic sizing agent (Kachio Fast SF, manufactured by BASF) is 30 kg / pulp t with pulp and a wet paper strength enhancer (WS4024, manufactured by Japan PMC Co., Ltd.) as converted to pulp solids. The raw material pulp slurry was prepared by adding 2% by weight, and paper was made with a long net paper machine to obtain a processed paper base paper.

  Next, a fatty acid ester compound as a water-soluble resin is added to 0.7% by weight of the pulp to prepare a coating solution, and this coating solution is applied to one side of the base paper using a transfer type gate roll. Apply to.

  In addition, Examples 2 to 19 and Comparative Examples 1 to 4 were produced in the same manner as in Example 1 except that the conditions shown in Table 1 were used. In addition, as an acidic rosin in a present Example, Toho Chemical Industries Co., Ltd. Perroser; E-3600 is used, As a neutral rosin, Toho Chemical Industries Co., Ltd. Perroser; R-10 is used, Alkyl ketene dimer. As (AKD), Harsize manufactured by Harima Chemicals Co., Ltd .; AK-720H was used, and as alkenyl succinic anhydride (ASA), AS1 manufactured by Seiko PMC Co., Ltd. was used. Also, PVA105 manufactured by Kuraray Co., Ltd. is used as the PVA of the water-soluble resin, and Latex OX1060 manufactured by Nippon Zeon Co., Ltd. (SBR latex, Tg 8 ° C., gel amount 70%) is used as the styrene-butadiene latex. NS-555 manufactured by Toho Chemical Industry Co., Ltd. was used as the acrylic / styrene copolymer.

  In addition, “pulp freeness (cc)” in Table 1 is a value measured by a drainage test method according to JIS-P8121 (1995).

  Further, “disaggregation freeness (cc)” is a value obtained by measuring raw pulp disaggregated according to JIS-P8220 (1998) by a drainage test method according to JIS-P8121 (1995).

  The results of quality evaluation for all of these Examples and Comparative Examples are as shown in Table 2.

  The “color test” in Table 2 indicates the result of a color test using TBP (tetrabromophenolphthalein ethyl ester potassium salt) described in Papier 28.101 (1974). is there.

  “Underwater elongation (%)” means “JAPAN TAPPI NO. 27 is the value of the Fenchell water elongation measured according to 27.

  “Residual rate (%)” is the residual rate of wet tensile strength (longitudinal), and is the dry tensile strength (longitudinal) measured according to JIS-P8113 (1998), which is JIS-P8135 (1998). It is a value obtained by dividing the wet tensile strength (longitudinal) obtained in conformity.

  “Weight ratio of two-layer peeling” refers to JAPAN TAPPI NO. 18 shows the weight ratio of the other layer when the base paper of each sample is divided into two layers by a peeling method according to No. 18, and the weight ratio of the layer with a small weight is 1. That is, the weight of each layer divided into two layers is measured with an electronic balance that can be measured within 5% accuracy, the weight of the layer with the larger weight is divided by the weight of the other layer (the layer with the smaller weight), It is the value displayed with one significant digit.

  “A ratio of ash content in two-layer peeling” refers to JAPAN TAPPI NO. 18 shows the ash content ratio of the other layer when the base paper of each sample is divided into two layers by the peeling method according to No. 18, and the ash content ratio of the layer with a small ash content is 1. That is, the ash content of each layer divided into two layers is measured by a method according to JIS-P8251 (2003), and the ash content of the layer with the larger ash content is measured with the other layer (the layer with the smaller ash content). ) Divided by the amount of ash, and expressed in one significant digit.

“Opening” is an evaluation of the dimensional stability of each sample, that is, whether or not there is a gap in the joint portion of the wallpaper. In the evaluation method, first, each sample which is a processed paper is processed into a wallpaper using a backing paper. After that, an appropriate amount of glue (adhesive) is uniformly applied to the backing paper, allowed to dry naturally for 10 minutes, wallpaper is then applied to the gypsum board, and a cut is made with a cutter knife in the middle. Two weeks later (after the glue was dried), the gap between the cuts caused by the shrinkage was measured and evaluated. The evaluation criteria were as follows.
A: The gap is within 0.05 mm.
○: The gap is 0.05 to 0.1 mm.
X: A clearance is 0.1 mm or more.

“Peelability” is an evaluation of the ease of peeling of wallpaper formed using each sample that is processed paper. In the evaluation method, first, each sample, which is a processed paper, is processed into a 980 mm long wallpaper using backing paper. Thereafter, an appropriate amount of glue (adhesive) is uniformly applied to the backing paper, and after natural drying for 10 minutes, wallpaper is applied to the gypsum board. Two weeks later (after the glue was dried), the wallpaper was peeled off from the edges, and the ease of peeling was evaluated. The evaluation criteria were as follows.
(Double-circle): When peeling 980 mm long wallpaper, it was able to be peeled off without being cut on the way from end to end.
◯: When the wallpaper having a length of 980 mm was peeled off, it was cut once, but started to peel again from the cut place, and was peeled to the end.
X: When the wallpaper having a length of 980 mm was peeled off, it was cut twice or more.

Furthermore, “blister” means that a vinyl chloride resin solution is applied to one side of each sample that becomes the backing paper with a thickness of 130 μm with a Mayer bar, dried at 190 ° C., and then generated on the surface of the vinyl chloride resin. The number of craters to be measured is measured and evaluated. The evaluation criteria were as follows.
◎: Select any 5 cm square, and there are no craters in the four squares.
○: Select any 5 cm square, and there is one crater in these four squares.
X: Four arbitrary 5 cm squares are selected, and there are two or more craters in these four squares.

From Table 2, it can be seen that the wallpaper formed by using the processed paper according to the present invention, that is, the processed paper according to Examples 1 to 19 as backing paper, is excellent in dimensional stability and peelability.

Claims (3)

Comprising at least a base paper and a coating layer,
The base paper had a mechanical pulp blending ratio of 40 to 70% measured based on a paper, paperboard and a color table by a C dyeing method according to the pulp-fiber composition test method specified in JIS-P8120 (1998). The ash content measured according to JIS-P8251 (2003) is 10 to 30%.
Further, the coating layer is formed by applying a coating liquid containing a water-soluble resin on at least one surface of the base paper,
Furthermore, a processed paper characterized by being colored blue in a color test using tetrabromophenolphthalein ethyl ester potassium salt (TBP) described in Papier 28.101 (1974). The water-soluble resin contains a fatty acid ester compound,
JAPAN TAPPI No. Fenchell water elongation according to No. 27 is 1.5% to 3.0%, and the wet tensile strength (longitudinal) residual rate measured according to JIS-P8135 (1998) is 10% to 25%. The processed paper according to claim 1, wherein the processed paper is provided. The inorganic pigment is calcined clay,
The base paper is a JAPAN TAPPI No. It is divided into two layers by a peeling method according to No. 18, and the ash content ratio of the other layer is 1 to 4 when the ash content ratio of the layer having a small ash content is 1, and the above 2 The weight ratio of the other layer is 1 to 2.3 when the weight ratio of the light weight layer of the base paper divided into layers is 1, wherein the weight ratio of the other layer is 1 to 2.3. Processing paper as described.