JP3329582B2 - Woven wallpaper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention greatly improves the coatability of an emulsion adhesive in the production of wallpaper and the work efficiency in the construction of the wallpaper while maintaining the texture and characteristics of the wallpaper. It is related to the rendered textile wallpaper.

[0002]

2. Description of the Related Art A woven wallpaper is a nonwoven fabric, a woven fabric, a knitted fabric, or a thread made of natural fibers such as silk, wool, cotton, and hemp, and synthetic fibers such as rayon, nylon, polyester, and acrylic bonded to a backing paper. This wallpaper has the unique warmth, texture and elegance of a woven pattern, and also has a sound-absorbing and heat-insulating effect, and its use has been increasing in recent years. When applying such wallpaper to the walls, ceilings, etc. of a building, a gluing operation is performed on site using a wallpaper gluing machine with a conventional water-soluble or water-dispersible adhesive such as starch or vinyl acetate emulsion. At this time, in order to improve work efficiency, a method is used in which a large amount of textile wallpaper is glued at one time, the glue surface is folded inward, and successively stuck to a wall. However, if the conventional textile wallpaper is glued on the back surface, the moisture quickly penetrates the backing paper and evaporates, so the usable time until pasting on the wall is too short and frequent gluing work is required, Alternatively, there are drawbacks such as that the inner glue dries and adheres to the folded surfaces and becomes unusable, or the progress of drying causes poor adhesion to the wall. To solve this problem, refer to
As disclosed in Japanese Patent No. -19999, a hydrophobic monomer having a solubility in water at 25 ° C of less than 2 g / water of less than 2 g / 100 g for adhesion between a nonwoven fabric and a backing paper at the time of fabric production is used as a main component. It has been proposed to use an emulsion of the copolymer described below. However, in the production of woven wallpaper, when the emulsion is applied to the backing paper, the penetration into the paper is large, so that an effective coating film cannot be secured on the paper, and the coating problem that the fabric or the like is difficult to adhere to the backing paper. was there.

[0003]

SUMMARY OF THE INVENTION The present invention does not have the above-mentioned problems of the prior art, and is manufactured using an emulsion adhesive having improved coatability on a backing paper. The purpose of the present invention is to provide a woven wallpaper in which the potable time from application of the glue on the back surface to application to the wall during application of the wallpaper is sufficiently ensured by the water blocking effect of the formed adhesive layer.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, they have developed an adhesive between a nonwoven fabric, a woven fabric, a knitted fabric, or a yarn made of natural and synthetic fibers and a backing paper, and to water. Emulsion polymerization in the presence of a radical polymerization initiator using only a reactive surfactant without using any non-reactive surfactant It has been found that the use of the emulsion thus prepared has the potential to solve the problem. Further, the type and amount of the monomer and the reactive surfactant were tested, and the present invention was reached. That is, the present invention provides a nonwoven fabric, a woven fabric, a knitted fabric, and a textile wallpaper in which yarns are bonded to a backing paper via an adhesive layer, wherein the adhesive layer has a solubility in water at 25 ° C. Obtained by subjecting a monomer mixture mainly composed of a hydrophobic monomer of less than 2 g / 100 g of water to emulsion polymerization in the presence of a radical polymerization initiator using only a reactive surfactant as a surfactant. The present invention relates to a textile wallpaper formed by drying from an emulsion.

Hereinafter, the present invention will be described in more detail. In the textile wallpaper of the present invention, it is needless to say that the dried film from the emulsion forming the adhesive layer is dense and free from pinholes and cracks, but it is necessary that the moisture permeability of the dried film is small. For that purpose, it is necessary to use as a main component a hydrophobic monomer having a solubility in water at 25 ° C. of less than 2 g / 100 g of water as a monomer for producing an emulsion adhesive to be used. Examples of such a monomer include styrene, a styrene derivative, butadiene, isoprene, an acrylate having an alkyl group having 2 to 18 carbon atoms, a methacrylate having an alkyl group having 1 to 18 carbon atoms, and vinyl chloride. , Vinylidene chloride and the like, and only one or two or more of them can be used at the same time.

In order to strengthen the adhesion between the backing paper and the fibrous material such as woven fabric, the hydrophilic monomer having a solubility in water of 2 g / 100 g or more at 25 ° C. It is preferred to combine the body as a minor component. Examples of such a hydrophilic monomer include, for example, (meth) acrylic acid [the expression (meth) acrylic here represents both acryl and methacryl, and the same applies hereinafter. A carboxyl group-containing monomer such as maleic acid, maleic acid half ester, crotonic acid and itaconic acid;
Hydroxyl group-containing monomers such as hydroxyethyl (meth) acrylate and 2-hydroxypropyl (meth) acrylate, (meth) acrylamide, N-methylol (meth) acrylamide, N-methoxymethyl (meth)
Amide group-containing monomers such as acrylamide and N-butoxymethyl (meth) acrylamide, dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth)
Examples include amino group-containing monomers such as acrylates, acrylonitrile, vinyl acetate, vinyl propionate, methyl acrylate, methoxyethyl (meth) acrylate, butoxyethyl (meth) acrylate, and the like.

The moisture permeability of the dried film from the emulsion adhesive used in the present invention is preferably not more than 2000 g / m ² · 24 h at 25 ° C. Also varies depending on the type and the amount ratio.
In order to achieve this moisture permeability, the amount of the hydrophobic monomer is preferably at least 50% by weight, more preferably at least 60% by weight of the total amount of the monomer.

Further, it has been found that in order to reduce the penetration of the emulsion adhesive into the backing paper, it is preferable to use only a reactive surfactant as a surfactant (emulsifier).
Examples of this reactive surfactant include:

Embedded image

[0009]

Embedded image Anionic reactive surfactants such as

[0010]

Embedded image And other nonionic reactive surfactants. This reactive surfactant can also be obtained from commercial products.

The reactive surfactant may be used alone or in combination of two or more. If the amount is too small, a large amount of coagulum will be generated in the produced emulsion. The resulting film does not show good physical properties.
If the amount is too large, the particle size of the polymer becomes too small, the viscosity of the emulsion becomes too high, the polymerization rate decreases, and the water resistance of the film also deteriorates. Therefore, the amount of this reactive surfactant used is 0.5 to
It is preferably 15% by weight, particularly preferably 1 to 7% by weight.

The radical polymerization initiator for producing the emulsion adhesive used in the present invention includes persulfates such as potassium persulfate and ammonium persulfate, hydrogen peroxide, t-butyl hydroperoxide, azobisamidino. Water-soluble types such as propane hydrochloride, benzoyl peroxide, cumene hydroperoxide, dibutyl peroxide, diisopropyl peroxydicarbonate, cumyl peroxy neodecanoate, cumyl peroxy octoate, azobisisobutyronitrile, etc. Oil-soluble type is used. If necessary,
A redox system using a reducing agent such as N, N-dimethylaniline, sodium acid sulfite, Rongalit, or ascorbic acid can also be used. The amount of the polymerization initiator to be used may be usually 0.01 to 10% by weight, preferably 0.05 to 5% by weight, based on all monomers.

In order to produce the emulsion adhesive used in the present invention, first, the above-mentioned various monomers are mixed, a reactive surfactant is added thereto, and a polymerization initiator and the like are further combined to polymerize in an aqueous system. . In this case, a method such as a method of batch charging polymerization and a method of performing polymerization while continuously supplying each component can be applied. The polymerization is usually carried out at a temperature of 10 to 90 ° C. with stirring. The solid content of the polymerization emulsion is 30-70% by weight
Range.

The emulsion adhesive further includes clay, talc, calcium carbonate, synthetic resin powder and the like as a matting agent, and inorganic and / or chlorine-based and bromine-based such as antimony trioxide and aluminum hydroxide as flame retardants. And other organic flame retardants. In addition, addition of a pH adjuster, a thickener, a filler, a bulking agent, an antifoaming agent, a fungicide, a plasticizer, and the like are optional as long as the object of the present invention is not impaired.

The wallpaper of the present invention can be produced by a known method. That is, an emulsion adhesive to which the above-mentioned optional components are added as necessary (solid content: 35 to 80% by weight)
The 60 to 150 g / m ^2, preferably 80~130g / m ^2, was uniformly coated on one surface of the backing sheet, non-woven fabric coated surface, overlapping woven, knitted, textile products such as yarn, natural drying or heat drying do it. And the coating amount is less than 60 g / m ² poor adhesive strength, 15
If it exceeds 0 g / m ² , flexibility and texture will be impaired.

The emulsion adhesive used in the present invention is:
It is manufactured using only a reactive surfactant without using any non-reactive surfactant used in usual emulsion polymerization, and has a high surface tension. It is believed that this high surface tension prevents excessive penetration into the paper when applied to the backing paper. Therefore, there is an advantage that an effective film of the adhesive is easily secured on the backing paper, and the amount of the emulsion adhesive required to obtain a film having a constant film thickness is small. In addition, the emulsion adhesive bonds or adheres the woven fabric or the like to the backing paper, and the formed adhesive layer (coating) functions as a water-stop film of the moisture of the water-based adhesive for wall application. It prevents water from evaporating early from the glued wallpaper and keeps the moisture of the glue constant for a long time.

[0017]

Next, the present invention will be specifically described based on examples. All parts in the examples are parts by weight, and all parts are percentages by weight. The properties of the pot life, moisture permeability and adhesive strength were measured as follows. 70 parts of vinyl acetate emulsion on the back pot life following Test pieces were uniformly applied to the coating amount of the adhered walls created at a ratio of 30 parts starch paste (40% solids) is 200 g / m ^2, immediately glue A part was cut off at regular intervals and peeled off, and the time until the papers could not be peeled off was measured. The composition of the above-mentioned wall paste is in accordance with JIS A 6921. Moisture permeability Measured at 25 ° C. by the JIS Z 0208 moisture permeability cup test method. Adhesive Strength A test piece described below was cut into a width of 25 mm and a length of 150 mm, and the 90 ° peel strength between the plain woven fabric and the backing paper was measured at 20 ° C. and a pulling speed of 20 mm / min.

Examples 1 to 5 and Comparative Example 1 Deionized water was added to a polymerization vessel equipped with a stirrer, a cooler and a thermometer.
After charging 40 parts, and adding 10% of the total amount of a mixed solution (hereinafter abbreviated as solution A) consisting of 40 parts of the monomer, surfactant and deionized water shown in Table 1, the mixture was heated to 80 ° C. Further, a mixed solution of 0.1 part of ammonium persulfate and 15 parts of deionized water was added to perform seed polymerization. Next, the remaining solution A was added dropwise at 80 ° C. over 3 hours. After the completion of the addition of the solution A, the inside of the polymerization vessel was kept at 80 ° C. for further 2 hours to complete the reaction. The solid content concentration of the obtained emulsion was 50%. This emulsion 100
Then, 1 part of a 15% aqueous solution of modified sodium polyacrylate, 10 parts of heavy calcium carbonate, and 10 parts of antimony trioxide were sequentially mixed to prepare an adhesive.

This adhesive (58% solids) was prepared using a commercially available basis weight.
80 g / m ² of the backing paper for wallpaper is evenly applied so that the coating amount is 120 g / m ² , and a plain fabric consisting of a blended product of cotton and rayon is stuck. By drying for ７7 minutes, a woven fabric wallpaper was obtained, and the adhesive strength (g / 25 mm) was measured using this as a test piece. Separately, the adhesive was uniformly applied to the surface of the backing paper so that the applied amount became 120 g / m ² , dried to obtain a test piece, and the working time (h) and the moisture permeability (g) / m ² · 24h) was measured. The measurement results were as shown in Table 1.

[0020]

[Table 1] The reactive surfactants in Table 1 are shown in the order from
4), 5), 7), 6), 14) and 13).

A woven fabric wallpaper was prepared by changing the application amount of the emulsion adhesive of Example 1 and Comparative Example 1, and the adhesive strength was measured. When the application amount was 60, 90, 120 and 150 g / m ² , In the emulsion adhesive of Example 1, 1700, 2200,
In contrast to those of 2500 and 2700 g / 25 mm, the emulsion adhesive of Comparative Example 1 had 700, 1200, 1600 and 2000 g / 25 mm, respectively, which was inferior to that of Example 1.

Comparative Example 2 Deionized water was added to a polymerization vessel equipped with a stirrer, a cooler, and a thermometer.
80 parts, 10 parts of partially saponified poval (average degree of polymerization: 1800) were charged, 10 parts of vinyl acetate was added, the mixture was heated to 80 ° C, and a mixed solution of 0.1 part of ammonium persulfate and 15 parts of water was added to perform seed polymerization. Was performed. Next, 90 parts of vinyl acetate was added dropwise at 80 ° C. over 3 hours.
C. to complete the reaction, then cooled to 60.degree. C. and mixed with 15 parts of plasticizer DBP. Using this vinyl acetate emulsion, a woven wallpaper was made in the same manner as in the example, and the adhesive strength was measured using the test piece as a test piece. Humidity was measured. The measurement results were as shown in Table 1.

[0023]

According to the woven wallpaper of the present invention, since the penetration of the emulsion adhesive applied to the backing paper during the production thereof into the paper is small, the coatability is improved, and the effective adhesive film having a constant thickness is formed on the backing paper. There is an advantage that a small amount of coating is required to obtain. In addition, when glue is applied to the back side of the woven fabric wallpaper during construction, the potable time is kept long because the moisture of the glue does not bleed to the front surface, and the waiting time when the glue surface is folded in two with the glue surface inside In addition, troubles such as sticking of the wallpapers within each other can be solved, and the required wallpaper can be pasted at a time by the wallpaper pasting machine, and then the user can concentrate on the pasting operation.

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁷ , DB name) B32B 1/00-35/00 D06N 7/00 D21H 27/00-27/42

Claims (1)

(57) [Claims] 1. A non-woven fabric, a woven fabric made of natural or synthetic fibers,
In a woven wallpaper in which a knitted fabric or a yarn is bonded to a backing paper via an adhesive layer, the adhesive layer has a solubility in water at 25 ° C.
Obtained by subjecting a monomer mixture mainly composed of a hydrophobic monomer of less than 2 g / 100 g of water to emulsion polymerization in the presence of a radical polymerization initiator using only a reactive surfactant as a surfactant. A textile wallpaper formed by drying from an emulsion.