JPH06394B2 - Flame retardant vinyl wallpaper - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a flame-retardant vinyl wallpaper in which a vinyl chloride resin layer is laminated on a base sheet layer used as an interior material for buildings.

[Conventional technology]

With the modernization of the building style, wallpaper has been used as an interior material.

Among these wallpapers, vinyl wallpapers in which a vinyl chloride resin layer is laminated on a substrate sheet are often used.

This vinyl wallpaper is not only easy to print and emboss and is excellent in design, but also has economical cost advantages including workability.

In addition, this type of wallpaper also has the flame retardancy required for this type of building material, and for these reasons, the demand is increasing more and more.

Conventionally, vinyl wallpaper obtains flame retardancy by subjecting the base sheet to flame retardant treatment or blending a flame retardant into the vinyl chloride resin layer, which is the main component of this vinyl chloride resin layer. It is well known that a vinyl chloride resin decomposes a composition when exposed to a high temperature accompanied by a flame and ignites itself as well as smokes.

Therefore, conventionally, as a method of improving the flame retardancy of this vinyl wallpaper, a base sheet mainly composed of pulp is treated with a flame retardant such as guanidine sulfamate, guanidine phosphate or ammonium sulfamate, or a vinyl chloride resin. It has been practiced to add smoke suppressants such as antimony compounds, molybdenum compounds, borates, organic phosphorus compounds, halogen compounds, aluminum hydroxide and magnesium carbonate to the vinyl chloride resin composition of the layer.

[Problems to be Solved by the Invention]

By the way, conventionally, in order to improve the flame retardancy of vinyl wallpaper, as described above, the base sheet is subjected to flame retardant treatment,
Although a flame retardant was blended in the vinyl chloride resin layer, such conventional technology improves the safety in recent years as the building becomes taller and denser, that is, a higher level of flame retardancy. Could not meet the request.

The present invention has been made against the background of such conventional techniques, and an object of the present invention is to provide a flame-retardant vinyl wallpaper capable of improving flame retardancy and also improving printability and opacity.

[Means for Solving the Problems]

The present invention is a vinyl wallpaper in which a vinyl chloride resin layer is laminated on a base sheet, wherein the base sheet is made of an inorganic base paper containing an inorganic compound powder and a pulp as main components, and the inorganic base paper is provided on one side or both sides. Inorganic compound 100
5 to 100 parts by weight of the organic binder solid content is mixed with 5 parts by weight of the coating layer in a dry state to form 5 to 5 parts per side.
The present invention provides a flame-retardant vinyl wallpaper characterized by being deposited at 50 g / m ² .

The base material sheet referred to in the present invention is a base material layer of a flame-retardant vinyl wallpaper, as described above, an inorganic base paper that is made from an inorganic compound powder and pulp as a main component, and at least one surface of the inorganic base paper (that is, The coating layer is laminated on one surface or both surfaces and contains an organic binder containing an inorganic compound as a main component.

As the inorganic compound powder, any powder may be used as long as it does not adversely affect the designability and quality which are the characteristics of the present invention, and examples thereof include titanium oxide, silicon dioxide, aluminum silicate, magnesium silicate, calcium carbonate. Magnesium hydroxide, zinc oxide, barium sulfate, aluminum hydroxide, talc and the like can be used, but it is particularly preferable to use, for example, aluminum hydroxide, which exhibits an endothermic effect by releasing crystal water when heated.

Moreover, as this pulp, generally used pulp can be used.

In addition to these inorganic compound powder and pulp, hemp, glass fiber, a pseudo-aggregating agent, a sizing agent, etc. for maintaining paper strength may be added to the inorganic base paper, if necessary.

As for the mixing ratio of the inorganic compound powder and the pulp constituting the inorganic base paper, the inorganic compound powder is 50 to 90% by weight, preferably 65 to 85% by weight, and the pulp is 10 to 50% by weight,
The content is preferably 10 to 30% by weight, and when the inorganic compound powder is less than 50% by weight, that is, when the pulp exceeds 50% by weight, the paper strength is improved but the flame retardancy is lowered, while the inorganic powder exceeds 90% by weight. That is, 10% by weight of pulp
If it is less than 1, the flame retardancy is improved, but not only the paper strength is lowered, but also inconvenience such as paper breakage occurs in workability during papermaking.

The basis weight of this inorganic base paper is 60 to 200 g / m ² , especially 8
0 to 160 g / m ² is preferable, and if it is less than 60 g / m ² , the strength is weakened, and a problem occurs in the texture of wallpaper, while if it exceeds 200 g / m ² , there is a problem in workability.

The coat layer as referred to in the present invention is a coat layer laminated on at least one surface of the inorganic base paper as described above, and contains an inorganic compound as a main component and an organic binder.

As the inorganic compound used in this coat layer, the same inorganic compound powder as that used in the above-mentioned inorganic base paper can be used.

Examples of the organic binder used in this coat layer include acrylic resin, melamine resin, vinyl chloride resin, vinyl acetate resin, ethylene-vinyl acetate copolymer resin (EVA), styrene-butadiene rubber (SBR), and the like. Organic binders can be used.

The compounding ratio of the organic binder to the inorganic compound is 5 to 100 parts by weight, preferably 10 to 5 parts by weight of the organic binder in terms of solid content based on 100 parts by weight of the inorganic compound.
When the amount is less than 5 parts by weight, the fluidity is lowered and thus the coatability at the time of laminating the coat layer is lowered.
If the amount exceeds 0 parts by weight, the coatability is improved, but the flame retardancy is lowered because the amount of the flammable organic binder added is large.

The organic binder is generally used in the form of an aqueous emulsion and has a solid content concentration of 20 to 60% by weight,
Especially, it is used at about 50% by weight.

Lamination by coating can be adopted for laminating this coat layer on the inorganic base paper, and for this coating operation, for example, a general coating system such as a doctor coat, a roll coater, or an air knife can be adopted.

Adhesion amount of the inorganic base paper of the coating layer, one side 5 to 50 g / m ² approximately in a dry state, particularly preferably 10 to 50 g / m ^2, with coating layer is too thin is less than 5 g / m ² of the flame retardant The effects of the present invention such as improvement are not sufficiently obtained, while 50 g / m ²
If it exceeds the range, the coat layer becomes unnecessarily thick, which is uneconomical, and troubles occur in the coating operation, which is not preferable.

The vinyl chloride resin layer in the present invention is a resin layer laminated on the substrate sheet as described above, and the vinyl chloride resin forming the vinyl chloride resin layer is obtained by general suspension polymerization or emulsion polymerization. Vinyl chloride resin alone or with vinyl chloride, vinyl acetate, ethylene, propylene, maleic acid ester, methyl methacrylate,
In addition to copolymers with methacrylic acid esters, higher vinyl ethers, etc., they include mixtures of these with other polymers.

As the plasticizer contained in the vinyl chloride resin layer, all the usual plasticizers applied to vinyl chloride resins can be used, but preferably phosphoric acid triphenyl ester (TPP) which is a flame retardant plasticizer. , Phosphoric acid cresyl phenyl ester (CDP), phosphoric acid diphenyl isopropyl phenyl ester, phosphoric acid tri-2-ethylhexyl ester (TOP), phosphoric acid octyl diphenyl ester,
Phosphoric acid esters such as phosphoric acid isodecyl diphenyl ester, halogen-containing phosphoric acid esters such as phosphoric acid tris-dichloropropyl ester, phosphoric acid tris-bromochloropropyl ester, and halogen-containing plasticizers such as chlorinated paraffin are used. .

Among them, monoalkyldiarylphosphates such as propyldiphenylphosphate, octyldiphenylphosphate and isodecyldiphenylphosphate are preferable.

Other plasticizers include, for example, di-2 phthalate.
-Ethylhexyl ester (DOP), phthalic acid dinonyl ester (DNP), phthalic acid diisononyl ester (DINP), phthalic acid butylbenzyl ester (BB
P), general phthalate plasticizers represented by dibutyl phthalate (DBP), dioctyl adipate (DOA), dioctyl sebacate (DOS), dioctyl azelate (DOZ) Besides general fatty acid ester plasticizers, polymer plasticizers such as polyester plasticizers can be used, and there is no particular limitation as long as they can be generally used as plasticizers for vinyl chloride resins.

The amount of these plasticizers added is 30 to 150 parts by weight, preferably 50 to 10 parts by weight, based on 100 parts by weight of the vinyl chloride resin.
If it is 0 parts by weight and less than 30 parts by weight, the vinyl chloride resin layer becomes hard and it is difficult to apply it as a wallpaper. On the other hand, if it exceeds 150 parts by weight, it becomes too soft, which is not preferable as a wallpaper.

Further, it is preferable that the plasticizer contains at least 50% by weight of the monoalkyldiarylphosphate.

The ratio of the monoalkyldiarylphosphate to the total amount of the plasticizer added is 50% by weight or more, preferably 70 to 100% by weight, and if it is less than 50% by weight, a good smoke suppressing effect may not be obtained.

The vinyl chloride resin layer may be non-foamed or foamed. When foaming, for example, azodicarbonamide, which is a foaming agent for vinyl chloride resin, as a foaming agent,
Foaming can be performed by using dinitrosopentamethylenetetramine, oxybisbenzenesulfonyl hydrazide, or the like, and a foaming accelerator or a foaming inhibitor may be added if necessary.

Further, a filler is usually blended in the vinyl chloride resin layer.

As the filler, for example, calcium carbonate, titanium oxide, magnesium hydroxide, talc, hydrotalcite, magnesium carbonate, aluminum hydroxide and the like can be used, and especially by using magnesium hydroxide, smoke emission is much lower. Become.

The amount of calcium carbonate added is 100% vinyl chloride resin.
30 parts by weight or more, preferably 50 to 20 parts by weight
If the amount is 0 parts by weight and the amount is less than 30 parts by weight, the smoke suppressing effect may be lowered, while if the amount is more than 200 parts by weight, the added amount may be too large and the resulting sheet may be easily broken.

The amount of titanium oxide added is 5 parts by weight or more, preferably 10 to 50 parts by weight, based on 100 parts by weight of the vinyl chloride resin. If the amount is more than parts by weight, the amount of addition may be too large and the resulting sheet may be easily broken.

Further, the amount of magnesium hydroxide added is 1 part by weight or more, preferably 5 to 100 parts by weight of the vinyl chloride resin.
It is 50 parts by weight, and if it is less than 1 part by weight, the smoke suppression effect may be reduced, while if it exceeds 50 parts by weight, the amount of addition may be too large and may be easily broken.

Further, a stabilizer is generally compounded in the vinyl chloride resin. Examples of the stabilizer include Ba-Zn-based stabilizers,
Common stabilizers used for vinyl chloride resins such as Na-Zn type and Sn type can be used.

The stabilizer is added in an amount of 0.5 to 10 parts by weight, preferably 2 to 5 parts by weight, based on 100 parts by weight of the vinyl chloride resin.

Further, in the vinyl chloride resin layer, as other flame retardants, for example, antimony trioxide, antimony pentoxide,
Zinc borate, molybdenum oxide, etc. can also be used together.

Furthermore, in the vinyl chloride resin, processing aids, pigments,
Ultraviolet absorbers, antistatic agents, antiaging agents and the like can also be used.

Further, when the plasticized vinyl chloride resin layer is paste-processed, a diluting solvent such as mineral spirit can also be used.

This vinyl chloride resin layer laminating method includes, for example, a common coating using a doctor coat, a roll coater, or an air knife similar to the case of laminating a coat layer on the above-mentioned inorganic base paper, and a rotary screen method or the like. Can be adopted.

The flame-retardant vinyl wallpaper thus laminated may be designed on its surface by gravure printing or embossing, if necessary.

〔Example〕

Examples of the present invention will be specifically described below, but the present invention is not limited to these examples.

Example 1 Formulation of base sheet 70% by weight of aluminum hydroxide and wood pulp (NB
KP) 30% by weight Inorganic base paper made as a main component (manufactured by Toyo Pulp Industry Co., Ltd., Cosmo W, basis weight 120 g /
m ² ), on one side, 100 parts by weight of an ethylene-vinyl chloride emulsion SE-1010 (Sumitomo Chemical Co., Ltd .; solid content concentration: 50% by weight), which is an organic binder, is hydroxylated as an inorganic compound powder. Aluminum C-30
1 (Sumitomo Chemical Co., Ltd.) 100 parts by weight was added and stirred, and the coating material that became the coating layer was applied using a doctor knife so that the amount of adhesion when dried was 20 g / m ^2, and the base sheet Got

Formulation of vinyl chloride resin paste Formulation (parts by weight) Vinyl chloride resin (P = 1,050) 100 Dioctyl phthalate 40 Octyl diphenyl phosphate 20 Calcium carbonate 50 Aluminium hydroxide 50 Stabilizer (F80A8 manufactured by Kyodo Pharmaceutical Co., Ltd.) 3 Foaming agent (AZ-H, Otsuka Chemical Co., Ltd.) 2 200 g of vinyl chloride resin paste composed of the above-mentioned formulation was coated on the coat layer of the base sheet using a doctor blade.
/ M ² application and heat treatment at a temperature of 210 ° C., after which the combustion performance was tested.

The performance evaluation at this time is as follows.

(A) Test method: A surface test prescribed in Ministry of Construction Notification No. 1828 was performed.

(B) Test method: The sheet was adhered to a pearlite plate using 20 g / m ^{2 of} starch paste (solid content conversion).

(C) Base material: 0.8 asbestos pearlite having a thickness of 1 cm specified by JIS A5413 was used.

As a result, the temperature-time area is 0, the smoke coefficient is 26,
It passed the test as an incombustible material having a smoke emission coefficient of 30 or less, and since the coat layer was laminated on the base material sheet layer, the printability and opacity were also improved.

Example 2 A flame-retardant vinyl wallpaper was laminated in the same manner as in Example 1 except that the base sheet was provided by laminating the coating layers on both sides of the inorganic base paper, and then the same combustion performance was tested. .

As a result, the temperature-time area is 0, the smoke coefficient is 24,
It passed the test as a non-combustible material having a smoke emission coefficient of 30 or less, and similarly, since the coat layer was laminated on the base material sheet layer, printability and opacity were also improved.

Example 3 100 parts by weight of SBR latex (solid content: 30% by weight) was used as the organic binder of the coating layer, and 100 parts by weight of calcium carbonate, 0.5 parts by weight of polyacrylate salt were used as the inorganic compound of the coating layer. A flame-retardant vinyl wallpaper was laminated in the same manner as in Example 1 except that a mixture of 0.7 parts by weight of carboxymethyl cellulose (CMC) was used, and then the same combustion performance was tested.

As a result, the temperature-time area is 0, the smoke coefficient is 26,
Similarly, it passed the test as a non-combustible material, and similarly, the coatability was laminated on the base material sheet layer, so that printability and opacity were also improved.

Example 4 A flame-retardant vinyl wallpaper was laminated and formed in the same manner as in Example 1 except that the coating amount of the coating layer was 50 g / m ² when dried, and then the same combustion performance was tested.

As a result, the temperature-time area is 0, the smoke coefficient is 24,
Similarly, it passed the test as a non-combustible material, and similarly, the coatability was laminated on the base material sheet layer, so that printability and opacity were also improved.

Comparative Example 1 Example 1 except that the coating layer was not laminated on the inorganic base paper.
A flame-retardant vinyl wallpaper was formed in the same manner as above, and then the same flame-retardant performance was tested.

As a result, the temperature-time area was 0 and the smoke emission coefficient was 38, which failed the nonflammability test, and the printability and opacity were poor because the coating layer was not laminated.

〔The invention's effect〕

Since the present invention is as described above, it is possible to obtain an effect that flame retardancy can be improved, and printability and opacity can also be improved.

Claims (2)

[Claims] 1. A vinyl wallpaper in which a vinyl chloride resin layer is laminated on a base sheet, wherein the base sheet is made of an inorganic base paper containing an inorganic compound powder and pulp as main components,
Moreover, the inorganic compound 10 is provided on one or both sides of the inorganic base paper.
The organic binder is 5 to 10 parts by weight in terms of solid content relative to 0 parts by weight.
A flame-retardant vinyl wallpaper, characterized in that a coating layer composed of 0 parts by weight is adhered in an amount of 5 to 50 g / m ^{2 on} one side in a dry state. 2. The flame-retardant vinyl wallpaper according to claim 1, wherein the inorganic compound contains aluminum hydroxide as a main component.