JPH0673700A - Production of flame-retardant paper for wall paper to be readily repapered - Google Patents

Abstract

PURPOSE:To produce a flame-retardant paper as a wall paper, readily releasable in repapering, leaving a uniform paper layer on a wall after removal. CONSTITUTION:In a wood pulp slurry, burnt kaolin or white carbon is used as a filler and starch or a polyvinyl alcohol as the binder. Or, in the pulp slurry, aluminum hydroxide is used as a filler and a polyacrylamide resin as the binder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant paper for backing vinyl wallpaper, which is particularly easy to peel off when relining,
The present invention relates to a method for producing a flame-retardant paper for backing a vinyl wallpaper, which has good workability.

[0002]

2. Description of the Related Art Conventionally, flame-retardant paper has been widely used as a base paper for various wallpapers, and most of them have been used as a backing paper for vinyl wallpapers. The vinyl wallpaper of the present invention is a product obtained by applying a vinyl chloride paste to flame-retardant paper, causing it to gel by heat treatment, and performing steps such as printing, embossing, and foaming. The backing paper is generally made of wood pulp and a filler (for example, titanium monoxide, a combination of titanium dioxide and talc or clay, or aluminum hydroxide, calcium carbonate, etc.), which is obtained by papermaking with a paper machine. Is produced by applying an aqueous solution containing a flame retardant and other chemicals mainly by a device such as a size press and drying.

For the construction of wallpaper, starch paste is applied to the surface of the backing paper and laminated on the wall surface. In recent years, the demand for replacement of existing houses has increased compared to newly built houses due to an increase in awareness of the design (with ease of construction) for living spaces. In this case, importance is attached to the ease of peeling the wallpaper to be replaced and the uniformity of the paper layer remaining on the wall surface after peeling. This is because most of the work of repainting the wallpaper is done manually, and the peeling resistance is heavy, and when it becomes difficult to peel off, the peeled marks become uneven, and it takes a considerable time to correct the groundwork.

However, the conventional backing paper has a large peeling resistance, and has a drawback that it takes a considerable amount of time to correct the base because the paper layer left on the wall after peeling is uneven.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned drawbacks of conventional products, is easy to peel off at the time of replacement, and is a method for producing flame-retardant paper for wallpaper in which the paper layer remaining on the wall after replacement is uniform. Is to provide.

[0006]

Means for Solving the Problems As a result of intensive studies to develop a flame-retardant paper for wallpaper that is easy to replace, the inventors of the present invention have found that wood pulp slurry contains burnt kaolin or white carbon alone or these. A paper sheet prepared by blending a filler containing aluminum hydroxide is coated with a flame retardant aqueous solution containing starch or polyvinyl alcohol as a binder for flame retardant treatment, or the pulp slurry is treated with aluminum hydroxide. It was found that the object can be achieved by applying a flame retardant treatment by applying an aqueous solution of a flame retardant using a polyacrylic amide resin as a binder to a paper sheet prepared by blending a filler and thus forming the present invention. It was

The pulp used in the present invention is not particularly limited. For example, bleached kraft pulp of various softwood and hardwood (hereinafter abbreviated as N-BKP, L-BKP) or groundwood pulp (hereinafter abbreviated as GP). , Thermo-mechanical pulp (hereinafter abbreviated as TMP), chemi-thermo-mechanical pulp (hereinafter C
High yield pulp such as -TMP) is used.

The filler is used in order to improve the hiding property and flame retardant effect, and titanium dioxide, aluminum hydroxide or the like is generally used. However, the present inventors have found that calcined kaolin and white carbon, which have not heretofore been used for the backing base paper for wallpaper, are effective in reducing the peel strength. These fillers are used in an amount of 5 to 40 parts, preferably 10 to 20 parts, per 100 parts of pulp. When it is less than 5 parts, the desired hiding property and flame retardancy are not obtained, and when it is 40 parts or more, the strength of the entire paper layer is largely reduced and the function as a backing paper for wallpaper cannot be exhibited.

Although these fillers can be used alone, they may be used in combination with titanium dioxide, aluminum hydroxide, etc. when the hiding property, flame retardancy, strength, etc. of the web are reduced, which causes problems. May be. The combined use amount of titanium dioxide and aluminum hydroxide is less than 10 parts based on 100 parts of pulp. This is because if the amount used in combination is 10 parts or more, the strength is greatly reduced.

Further, when aluminum hydroxide is used as a filler, light peelability can be imparted by using the following polyacrylic amide as a binder.

The binder of the present invention is used to obtain a preferable peeling property by preventing the vinyl chloride paste or the adhesive for sticking to the wall surface from penetrating into the paper layer. When the filler is calcined kaolin or calcined kaolin and aluminum hydroxide, starch or polyvinyl alcohol is used. Further, when the filler is aluminum hydroxide alone, a polyacrylic amide resin which is more excellent in the effect of improving the surface strength than starch or polyvinyl alcohol is used.

As the polyacrylic amide of the present invention, one having a degree of polymerization of 100,000 to 500,000 is used, for example, manufactured by Arakawa Chemical Industry Co., Ltd. (trade name: polymer set, model number: 30
5), manufactured by Seikou Kagaku Kogyo Co., Ltd. (trade name: X coat, model number: P-180N) is used.

These binders are used in an amount of 0.1 to 2 parts, preferably 0.2 to 1 part, per 100 parts of pulp.
If it is less than 0.1 part, sufficient surface strength cannot be obtained, and if it is 2 parts or more, the releasability deteriorates due to penetration into the paper layer.

The flame retardancy in the present invention is achieved by applying a mixed solution mainly comprising a flame retardant and a binder for imparting surface strength to a web by a size press or the like and drying. As the flame retardant of the present invention, guanidine sulfamate, or a methylolated modification thereof,
Ammonium sulfamate, guanidine phosphate and the like are used, and they may be used alone or in combination of two or more.

In the backing paper of the present invention, in addition to the above essential components, if desired, a wet paper strength enhancer, a surface sizing agent, a dye, an antifoaming agent, a retention aid, and a methylol compound as a discoloration preventing agent. Melamine, dicyandiamide and the like can be appropriately used.

The backing paper of the present invention can be produced, for example, as follows. That is, a slurry obtained by adding a paper-making chemical and a filler to an appropriate mixed pulp is paper-made by a Fourdrinier paper machine to obtain a web. A mixed aqueous solution of a flame retardant, a surface sizing agent, a binder and the like is applied to the obtained paper web by a size press and dried to obtain a flame retardant paper.

[0017]

The present invention will be described in more detail with reference to Examples. In this example, the following wet paper strength enhancer,
Fillers, retention aids, flame retardants, surface sizing agents and binders were used.

1) Wet paper strengthening agent Polyamide epichlorohydrin resin; Arakawa Chemical Industry Co., Ltd., "Arafix 100" (trade name) 2) Filler aluminum hydroxide; Showa Denko KK, "Hijilite H" -42 "(trade name), central particle size 1.0 micron titanium dioxide; manufactured by Furukawa Mining Co., Ltd.," FA-55W "
(Trade name) Calcined kaolin; manufactured by Engelhard, "ANSILE"
"X" (trade name), central particle size 1.0 micron white carbon; manufactured by Tokuyama Soda Co., Ltd., "Tokushiru G"
UN "(trade name), central particle size 8 to 10 microns 3) Yield improver Polyacrylic amide resin; Hakuto Chemical Co., Ltd.," Polymaster R-623 "(trade name) 4) Flame retardant guanidine sulfamate Manufactured by Sanwa Chemical Co., Ltd.
"AP-1" (trade name) 5) Surface sizing agent Styrene acrylic copolymer; manufactured by Seikou Kagaku Kogyo Co., Ltd.
"Coropearl S-540" (trade name) 6) Binder polyacrylic amide; manufactured by Hoshiko Kagaku Kogyo Co., Ltd., "X Coat P180N" (trade name) Polyvinyl alcohol; manufactured by Nippon Gosei Co., Ltd., "Gothenal T330" (trademark) Name) Starch; manufactured by Ajinomoto Co., Inc., "S Sansizer 70"
0 "(trade name)

Example 1 50 parts by weight of N-BKP, 20 parts by weight of L-BKP, and stone ground wood pulp (hereinafter abbreviated as S-GP) 30
1.0 part by weight of a sulfuric acid band in a pulp slurry consisting of parts by weight, 0.4 parts by weight of a polyamide epichlorhydrin resin (Arakawa Chemical Industry Co., Ltd., trade name: Arafix 100) as a wet paper strength enhancer added. 20 parts by weight of aluminum hydroxide (manufactured by Showa Denko KK, trade name: Hydilite H-42; central particle size 1.0 micron) is added to this slurry, and polyacryl amide resin (Hakuto) is used as a yield improver. Made by Chemicals, product name: Polymaster R-
623) was added at 200 PPM. The slurry was subjected to paper making with a Fourdrinier paper machine to obtain 58 g / m ² webs. Then, as a flame retardant, guanidine sulfamate (manufactured by Sanwa Chemical,
Product name: AP-1) 100 parts by weight, surface sizing agent (manufactured by Hoshiko Kagaku, product name: Coropearl S-540) 5 parts by weight, and polyacryl amide (manufactured by Hoshiko Chemical Co., product name: X coat P180N) 3 parts by weight A 70% aqueous solution having a concentration of 22% by weight is applied to a web by a size press method and dried.
A flame-retardant paper of / m ² was obtained.

Example 2 The same pulp paper making chemicals and retention aid as in Example 1 were added, and 10 parts by weight of aluminum hydroxide as a filler and calcined kaolin (manufactured by Engelhard, trade name: Ansilex; central particle size) The slurry added with 10 parts by weight of 1.0 micron) was subjected to papermaking with a Fourdrinier paper machine to obtain 58 g / m ² web. Then, in the same manner as in Example 1, a flame retardant, a surface sizing agent, and oxidized starch (manufactured by Ajinomoto Co., Inc., trade name: Essan Sizer 70).
0) An aqueous solution having a concentration of 22% by weight consisting of 10 parts by weight was applied to the web by a size press method and dried to 70 g / m ^2.
I got the flame-retardant paper.

Example 3 10 parts by weight of aluminum hydroxide as a filler and white carbon (manufactured by Tokuyama Soda Co., Ltd., trade name: TOKUSIL GUN) were added to a slurry obtained by adding the same pulp and papermaking chemicals as in Example 2.
The slurry added with 10 parts by weight of a particle size of 8 to 10 μm was paper-made with a Fourdrinier paper machine to obtain 58 g / m ² of web. Then, a 22 wt% aqueous solution having the same composition as in Example 1 was applied by a size press method and dried to obtain 70 g / m ² flame-retardant paper.

Comparative Example 1 The same pulp, papermaking chemicals and filler as in Example 1 were added to a slurry to prepare paper, and a 58 g / m ² web was obtained. Then, a flame retardant, a surface sizing agent and polyvinyl alcohol (manufactured by Nippon Gosei Co., Ltd., trade name: Gohsenal T330) of 5 parts by weight similar to those in Example 1 were used to apply an aqueous solution of 22% by weight by a size press method, followed by drying. 70 g / m ² flame-retardant paper was obtained.

Comparative Example 2 Titanium dioxide (manufactured by Furukawa Mining Co., Ltd., trade name FA, used as a filler was added to a slurry obtained by adding the same pulp and melting paper chemicals as in Comparative Example 1.
(55 W) 10 parts by weight of the added slurry was paper-made with a Fourdrinier paper machine to obtain 58 g / m ² of web. Then, an aqueous solution having the same composition as in Example 2 and having a concentration of 22% by weight was applied by a size press method and dried to obtain 70 g / m ² flame-retardant paper. The flame-retardant paper produced as described above was tested for basis weight, flame retardancy, hiding power, strength, filler content in paper, and peel strength by the following methods, and the results are shown in the table.

(Test method) 1. Basis weight Measured according to JIS P-8124. 2. Flame retardance measurement According to JIS Z-2150 (45 ° Meckel burner method). 3. Measurement of hiding property According to JIS P-8138. 4. Measurement of Strength Tensile strength and tear strength were measured according to JIS P-8113 and P-8116. 5. Filler content in paper The ash weight after burning the backing paper at 900 ° C. was reduced and converted to the filler weight, and expressed as a percentage with respect to the weight before burning. 6. Peel strength measurement A paste consisting of vinyl chloride, plasticizer (phthalate ester), calcium carbonate, titanium dioxide, mineral spirits, etc. was applied on the surface of the backing paper with a coating thickness of 250 microns and gelled at 180 ° C for 2 minutes. did. Starch-based Yayoi Chemical A on the backing paper surface of the obtained vinyl wallpaper sample
Glue was applied, adhered to a plywood board, and dried overnight. After that, a notch having a width of 3 was made with a cutter, and the peel strength when peeled from the veneer plate was measured with a Tensilon universal tensile tester. The test results are shown in Table 1.

[0025]

[Table 1]

[0026]

In Example 1, the effect of the binder of Comparative Example 1 was compared, but the peelability was greatly improved by using polyacrylic amide, and a specific amount of calcined kaolin or white carbon was used. Examples 2 and 3
Is more excellent in peelability than Comparative Example 2 using titanium dioxide which has been used conventionally.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Internal reference number FI Technical display location D21H 17/36 17/64 17/67 21/34 7199-3B D21H 1/34 E 7199-3B 3 / 44 7199-3B 3/72 7199-3B 3/78 (72) Inventor Tomomi Noji 505-1 Pulp Town, Asahikawa City, Hokkaido Sanyo Kokusaku Pulp Co., Ltd. (72) Inventor Yuho Kanna, Asahikawa City, Hokkaido 505-1 1 Sanyo Kokusaku Pulp Co., Ltd. (72) Inventor Naoshi Yamashina 505-1 Pulp Town, Asahikawa City, Hokkaido Sanyo Kokusaku Pulp Co., Ltd.

Claims (4)

[Claims] 1. A flame retardant comprising a wood pulp slurry, burned kaolin or white carbon alone, or a paper made from a filler containing aluminum hydroxide in combination, and starch or polyvinyl alcohol as a binder. A method for producing a flame-retardant paper for light-peeling vinyl wallpaper lining, which comprises applying an aqueous solution and performing a flame-retardant treatment. 2. A flame retardant composition comprising a wood pulp slurry mixed with an aluminum hydroxide filler and papermaking coated with an aqueous solution of a flame retardant containing a polyacrylic amide resin having a polymerization degree of 100,000 to 500,000 as a binder. A method for producing a flame-retardant paper for backing a light-peeling vinyl wallpaper, which is characterized by being treated. 3. The method according to claim 1, wherein the filler is 5 to 40 parts and the binder is 0.1 to 2.0 parts with respect to 100 parts of the wood pulp slurry. 4. The method according to claim 2, wherein the filler is 5 to 40 parts and the binder is 0.1 to 2.0 parts with respect to 100 parts of the wood pulp slurry.