JPH0268400A - Porous vinyl chloride resin wall paper - Google Patents

Abstract

PURPOSE:To provide the subject wall paper having an adsorbability of poisonous gases, malodor, moisture, etc., and having an aromatic odor by coating a substrate with a composition comprising a vinyl chloride resins, an open cell- forming agent, a moistuire-absorbable and adsorbable inorganic powder, a thermal decomposition type foaming agent, etc., and subsequently thermally foaming the coated composition. CONSTITUTION:A composition consisting essentially of a vinyl chloride resin, an open cell-forming (preferably a homopolymer such as PE or PP, an olefinic polymer such as ethylene-propylene copolymer, etc.), a moisture-absorbable and adsorbable inorganic powder (preferable the fine powder of a tuff mineral such as Oyaishi or Shirasu, the fine powder of a fossil mineral such as diatomaceous earth, etc.), a plasticizer and a stabilizer is coated on a substrate and subsequently thermally foamed to provide the objective wall paper.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides an adsorption effect on toxic gases, bad odors, moisture, etc.
The present invention also relates to porous vinyl chloride resin wallpaper that has the function of improving the living environment of a living space by having aromatic properties.

(Prior Art) Vinyl chloride resin wallpaper (hereinafter referred to as vinyl wallpaper) is widely used as an interior material for buildings because of its excellent design expression and low cost.

(Problems to be Solved by the Invention) However, living environments in which conventional vinyl chloride resin wallpaper is used cannot necessarily be said to be comfortable. This is because vinyl chloride resin wallpaper has poor breathability and tends to trap various bad odors, toxic gases, moisture, etc. generated in living spaces indoors. As a result, the indoor temperature becomes high, the air becomes polluted, and people tend to feel uncomfortable.

On the other hand, natural materials such as wood, paper, and clay walls, which have traditionally been used as building materials in Japan, are very suitable for our country's climate and are able to keep indoor air clean at all times. It has the function of preserving. This is because these materials naturally have breathability, humidity-regulating properties, absorbing bad odors and harmful gases, and emitting aromas that are pleasant to humans.

The present invention is a wallpaper that improves the living environment by taking advantage of the characteristics of vinyl chloride resin wallpaper, which is inexpensive and rich in design, while incorporating the characteristics of natural materials such as breathability, adsorption, and aromatic properties. The purpose is to provide

In addition, attempts have been made to add functionality to vinyl chloride resin wallpaper by adding agents such as deodorants, fragrances, or pest repellents; Even if the drug is added inside the resin layer, the effect of the drug will not be fully exhibited because the drug will be buried inside the resin layer.

Therefore, in order to impart practical performance, it is necessary to add a large amount of chemicals, which causes problems in terms of physical properties and cost. Therefore, another object of the present invention is to provide a vinyl chloride resin wallpaper that can fully exhibit the effects of the chemicals it contains.

(Means for Solving the Problems) In order to achieve the above object, the porous vinyl chloride resin wallpaper of the present invention includes a vinyl chloride resin, an open cell forming agent,
It is characterized in that it is obtained by applying a composition containing a hygroscopic and adsorbent inorganic powder, a thermally decomposable blowing agent, a plasticizer, and a stabilizer as essential components onto a substrate, and then heating and foaming the mixture.

The above compound is preferably in the form of a paste, and by heating and foaming it, open cells are formed and porous wallpaper is obtained.

In the present invention, the term "open cell forming agent" refers to a foaming agent that breaks the walls of the formed cells when the foaming agent is thermally decomposed to gasify and form cells in the molten vinyl chloride resin layer. , meaning a substance having a so-called open cell forming effect.

As such an open cell forming agent, for example, olefinic polymers and hydrocarbons can be used. Examples of olefin polymers include homopolymers such as polyethylene and polypropylene, and ethylene-propylene copolymers. As hydrocarbons, C,
■]2. ．． . Examples include vaselines and paraffins, which are mixtures of saturated hydrocarbons having a composition of 2 (representing an integer from n-16 to 40).

The amount of open cell forming agent added is based on 100 parts by weight of vinyl chloride resin, which is the main component of the vinyl chloride resin compound.
The amount is 0.5 to 25 parts by weight, preferably 2 to 15 parts by weight.

The vinyl chloride resin, which is the main component of the formulation for producing the porous vinyl chloride resin wallpaper of the present invention, is a polymer whose main component is vinyl chloride monomer, and the vinyl chloride resin,
These include vinyl chloride-ethylene copolymer, vinyl chloride-vinyl acetate copolymer, and the like. As these vinyl chloride resins, it is preferable to use so-called paste resins obtained by an emulsion polymerization method or a microsuspension method.

The hygroscopic and adsorbent inorganic powder used in the formulation for the production of the porous vinyl chloride resin wallpaper of the present invention is characterized by its ability to absorb water and eliminate harmful chemicals or odors generated in the indoor environment. Use materials that have adsorption properties for certain chemical substances. For this reason, it is preferable to use a powder of a porous material or a material having a layered structure, a powder with a high specific surface area, or the like. The particle size of the powder is preferably 1 to 1
00 μm. Examples of such materials include tuff minerals such as Oya stone and whitebait, fossil minerals such as diatomaceous earth, and clay minerals having a structure in which a 5i-0 layer lattice is continuous in a layered or chained manner. Clay minerals include those with a two-layer structure such as kaolinite and hallosite, those with a three-layer structure such as pyrophyllite, muscovite, sericite, illite, and montmorillonite, and those with a double-chain structure such as apurgite. In addition, derivatives of these clay minerals can also be used. Alumina, silica gel, and zeolites are also inorganic powders that can be used in the practice of this invention. Clay minerals and zeolites are naturally occurring, but of course, those produced synthetically and industrially can be equally used. In particular, alumina and silica gel are industrially synthesized synthetic minerals of higher quality than natural minerals and are therefore suitable for use in the present invention. Other examples include alumina,
Also included are fine powders of ceramics which are mainly composed of warp or clay minerals and are fired. The amount of inorganic powder added is 5 to 1 part by weight per 100 parts by weight of vinyl chloride resin.
The amount is 50 parts by weight, preferably 10 to 150 parts by weight.

Typical examples of the thermally decomposable blowing agent used in the present invention include azodicarbonamide, 4,4'-oxyhishenzenesulfonylhydrazine, di-1-0 sopentamethylene, and the like. The amount of these blowing agents added can be freely selected depending on the required texture and design expression, but the usual amount added is 1.5 to 15 parts by weight per 100 parts by weight of vinyl chloride resin. Added within a range.

The heating temperature for foaming varies depending on the type of foaming agent, vinyl chloride resin, etc., but is usually 180 to 240°C.

As the plasticizer used in the present invention, a common plasticizer used for vinyl chloride resins can be used. Usually, phthalate ester plasticizers, which are secondary plasticizers, are used, but in addition to these, phosphate esters, flame retardant plasticizers such as chlorinated paraffin, and so-called secondary plasticizers such as mineral spirits and alkylbenzenes are also used. It is also possible to use a plasticizer or the like in combination. The amount of these plasticizers added can be arbitrarily adjusted within a range that provides stable work when processing the vinyl chloride resin paste of the present invention, but the usual amount is 100% by weight of the vinyl chloride resin. parts, the total amount of the primary plasticizer and the secondary plasticizer is 40 to 120 parts by weight.

The stabilizer used in the present invention is an essential additive in that it has the effect of suppressing thermal deterioration when heating vinyl chloride resin. It is an additive that also has the effect of lowering the decomposition temperature of the thermally decomposable blowing agent, and has an auxiliary effect in forming the open cells of the present invention.

As the stabilizer that can be used in the present invention, metal soaps such as Zn, Ba, Ca+Na, etc., which are commonly used for vinyl chloride resins, can be used, but in particular, Zn-Na type, Z
n-Ba system, Zn-based system, Zn-Ca system, Zn-Na system
Composite stabilizers such as K-based and Zn-Ba-Na-based stabilizers are preferred.

In addition, to the vinyl chloride resin compound used in the present invention, fillers, surfactants, antifungal agents, water-absorbing resins, pigments, etc. used in boat fishing may be added as necessary. Can be done.

The method for applying the vinyl chloride resin compound used in the present invention may be any method as long as the vinyl chloride resin compound is usually coated and heat-processed. In order to fully exhibit the effects of the invention, it is desirable to take a step of forming an uneven pattern that maintains the porous structure.

In particular, in the method of forming an uneven pattern using an embossing roll, it is necessary to select and use an embossing roll with a shape (uneven texture) that allows the foam structure to partially remain and the porous structure to be maintained. It won't happen.

The rotary screen printing method is a processing method that allows designs to be added while substantially maintaining the porous structure, and is a very suitable processing method for carrying out the present invention.

In addition, after applying a vinyl chloride resin compound to the base material,
There is also a method of heating and gelling, applying a pattern to the surface of the gelled compound with an ink containing a foaming inhibitor, and then heating and foaming.

Regardless of the method of applying the design using an embossing roll or the method of applying the design using rotary screen printing, in order to demonstrate the function of the porous structure, the area ratio occupied by the vinyl chloride resin that maintains the porous structure must be adjusted. It is necessary to consider that the ratio is at least 10%, preferably 30% or more.

The base material used in the present invention may be anything that can be used for ordinary vinyl chloride resin wallpaper, such as paper, woven fabric, or non-woven fabric.

It is also possible to carry a chemical such as a deodorant, a fragrance, or an insect repellent in the inorganic powder within the open cells of the vinyl chloride resin layer of the present invention, and to continuously exert the function of the chemical. be.

As a method for supporting the drug, the functional drug is added to the compound together with other ingredients when producing the compound for producing the vinyl chloride resin wallpaper of the present invention, and the compound is added to the compound. A method is to apply a substance to a substrate and heat and foam it, or to pre-impregnate an inorganic powder with a liquid or a liquid agent by dissolving or dispersing it, and then mix the inorganic powder with other ingredients and apply it to the substrate. There are methods such as heating and foaming. In addition, in order to reduce the loss of functional chemicals due to volatilization or decomposition and deterioration during heating and foaming, we are applying vinyl chloride resin wallpaper each time we apply a formulation that does not contain these chemicals to the base material and heat and foam it. There is also a method in which a functional agent is formed on a base material and then a functional agent is applied in liquid form or liquefied by dissolving or dispersing to the surface of the wallpaper, and the agent is impregnated into the inorganic powder in the open cells. This is particularly effective when the sexual drug is highly volatile or easily degraded by heat.

However, from the viewpoint of drug persistence, a method in which inorganic powder is impregnated with a solution of the drug in advance is particularly effective.

The functional drugs used in the present invention include, for example, deodorants, fragrances, pest repellents, and the like.

As deodorants, the following may be used, for example: chemical adsorbents using redox reactions such as organic carboxylic acids, organic peroxides or ferrous sulfate, citral, cinnamic tuqualdehyde. , Vanillin, Heli No. 1
- Masking agents containing lopin, coumarin, or camphor, enzyme deodorants containing amylase, protease, or lipase, plant extracts containing flavonoids, amino acids, tannins, phenols, etc. as main ingredients.

As fragrances, for example, the following may be used: natural fragrances of animal and vegetable origin, such as hawk incense, jasmine, lemon oil or extracts of cypress, men-1-alcohol, β-phenylethyl alcohol, phenylacetaldehyde, Synthetic fragrances such as musk xylene and musk ketones.

As the pest repellent, 2-x thyl-1,3 hexanediol, inclone, dimethyl phthalate, diethylamide, dimethyltoluamide, diethyltoluamide, etc. can be used, but are not limited to these.

(Function) The vinyl chloride resin wallpaper of the present invention includes vinyl chloride resin,
Made by heating and foaming a compound containing an open cell forming agent, inorganic powder, etc., open cells are formed in the wallpaper, and the interior is filled with highly absorbent inorganic powder to remove indoor moisture. and adsorb harmful or odor-causing chemicals present in the air. Further, since the inorganic powder in the open cells can carry a chemical such as a deodorant, a fragrance, or an insect repellent, a sustained effect of the chemical can be obtained in this case.

(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples.

Examples 1 to 4: Coating a vinyl chloride resin paste with the composition shown in Table 1 below on flame-retardant backing paper of 80 g/m2 (fabric weight 250 g/m2) L, 200°C for 1 minute 20 seconds. Heating was performed to obtain a foam sheet for vinyl chloride resin wallpaper according to the present invention.

Comparative Examples 1 and 2: Coating a vinyl chloride resin paste with the composition shown in Table 1 below on 80 g/m'' flame-retardant backing paper (fabric weight 250 g/m2) at 200°C for 1 minute and 20 seconds. A conventional foam sheet for vinyl chloride resin wallpaper was obtained for comparison.

Table 1 Test Example 1: Gas adsorption performance test Porous formation and gas adsorption performance of the wallpapers obtained in Examples 1 to 4 and Comparative Examples 1 to 2 were measured by the following method.

A test piece measuring 180 x 250 mm was bent in half, pasted together with double-sided tape so that the base surfaces were in close contact with each other, and placed in a polyvinyl fluoride odor tube.

3N of air is put into this odor tube, and hydrogen sulfide (
(initial concentration 30 ppm) was added to this mounting, 5 minutes, 10
The concentration after 20 minutes, 20 minutes, and 30 minutes was measured by gas chromatography. Furthermore, ammonia water (first as ammonia gas!tJ]i! degree 20ppm) was added to the same odor tube as above containing the test piece and air 31, and
The concentrations after 0 minutes, 20 minutes, and 30 minutes were measured by gas chromatography. Incidentally, a stink tube without a test piece was used as a control. The results are shown in Tables 2 and 3.

Table 2 Table 3 As is clear from the results in Tables 2 and 3, Example 1
Wallpapers Nos. 4 to 4 have better adsorption performance than the wallpapers of Comparative Examples 1 and 2.

Test Example 2: Porous Confirmation Test The moisture permeability of the wallpapers obtained in Examples 1 to 4 and Comparative Examples 1 to 2 was measured according to JIS-Z-0208, and the degree of porous formation was evaluated from this value. . In the measurements, calcium chloride was used as a moisture absorbent. The measurement conditions were a temperature of 40° C. and a humidity of 90%. The results are shown in Table 4.

It is clear that the moisture permeability is high in all of Table 4, making it porous.

Example 5 To the vinyl chloride resin wallpaper obtained in Example 2, French Shiramatsu FS-500-M (manufactured by Shiraimatsu Pharmaceutical Co., Ltd., 20% plant extract ingredients, 20% Pr:J pyrene glycol) was added as a deodorizer. , 60% water) was applied using a 120-mesh gravure print roll.

Comparative Example 3 Example 5 was added to the vinyl chloride resin wallpaper obtained in Comparative Example 2.
The same deodorant was applied in the same manner.

The deodorizing performance of the vinyl chloride resin wallpaper obtained in Example 5 and Comparative Example 3 was measured by the same method as the gas adsorption performance test in Test Example 1. The results obtained are shown in Table 5.

As is clear from the results in Table 5 and Table 4, the wallpapers of Examples 1 to 4 were changed to the wallpapers of Comparative Examples 1 and 2. As in Example 5
It is clear that the wallpaper of Comparative Example 3 has better adsorption performance and therefore better deodorizing performance than the wallpaper of Comparative Example 3.

Example 6 10 parts of dimethyltoluamide to 50 parts by weight of diatomaceous earth
Parts by weight were added and mixed in a Henschl mixer to prepare diatomaceous earth on which dimethyltoluamide was adsorbed, and a vinyl chloride resin paste having the composition shown in Table 7 was prepared. This vinyl chloride resin paste was applied onto a flame-retardant backing paper for wallpaper (weighing 80 g/m2) as a base material using an 80 mesh nylon screen. This sheet is 210°
It was heated for 60 seconds in an oven of C to obtain a vinyl chloride resin wallpaper according to the present invention.

Comparative Example 4 50 parts by weight of diatomaceous earth, 10 parts by weight of dimethyltoluamide
Parts by weight were added and mixed in a Henschl mixer to prepare diatomaceous earth on which dimethyltoluamide was adsorbed, and a vinyl chloride resin paste having the composition shown in Table 8 was prepared. As a base material, this vinyl chloride resin paste was applied onto flame-retardant backing paper for wallpaper (weighing 80 g/m2) using an 80-mesh nylon screen. This sheet is 210°
A conventional vinyl chloride-based resin wallpaper was prepared for comparison by heating the wallpaper in an oven at 60 seconds.

Table 8 The pest repellent effects of the foamed sheets obtained in Example 6 and Comparative Example 4 were evaluated from the strength of the diethyltoluamide odor detected from these sheets through the sense of smell. The results obtained are shown in Table 9.

Test Example 2: Odor Sensing Test The two specimens for comparison can be folded in half to provide space. In addition, by supporting drugs such as deodorants, fragrances, or insect repellents in the inorganic powder in open cells, the effects of the drugs are sustained and good, and a large effect can be obtained with a small amount of the drug. Therefore, it is economically superior.

Paste the base materials together with double-sided adhesive tape so that they are in close contact with each other, and place them in a polyfluorinated vinyl pot.

After introducing air at 3°C into this odor tube, it was sealed and materials for sensory testing were prepared. Five panelists compared the strength of the odor of the two created odor sticks.

Table 9 As is clear from the results in Table 9, it is clear that the wallpaper of Example 6 has superior pest repellent dispersion properties compared to the wallpaper of Comparative Example 4, and therefore has a good pest repellent effect. be.

(Effect of the invention)

Claims (5)

[Claims] (1) Applying a composition containing a vinyl chloride resin, an open cell forming agent, a hygroscopic and adsorbent inorganic powder, a pyrolytic foaming agent, a plasticizer, and a stabilizer as essential components onto a substrate, Porous vinyl chloride resin wallpaper obtained by heating and foaming. (2) The open cell forming agent is a homopolymer such as polyethylene or polypropylene, an olefin polymer such as an ethylene-propylene copolymer, or the following formula: C_nH_
2. The porous vinyl chloride resin wallpaper according to claim 1, wherein the porous vinyl chloride resin wallpaper is selected from a mixture containing a saturated hydrocarbon compound having a composition of 2_n_+_2 (n represents an integer from 16 to 40). (3) The inorganic powder is a fine powder of tuff minerals such as Oya stone or whitebait, a fine powder of fossil minerals such as diatomaceous earth, and a clay mineral crystal structure with a two-layer, three-layer, or double-chain crystal structure. 2. The porous vinyl chloride resin wallpaper according to claim 1, wherein the wallpaper is one or more selected from zeolites, alumina, and silica gel having pores. (4) After impregnating the inorganic powder according to claim 1 with a liquid or a drug such as a deodorant, a fragrance, or an insect repellent made into a liquid by dissolving or dispersing it, the inorganic powder and the vinyl chloride resin are impregnated in advance. A porous vinyl chloride resin wallpaper obtained by blending an open cell forming agent, a pyrolytic foaming agent, a plasticizer, and a stabilizer, applying the mixture onto a base material, and foaming it under heating. (5) A deodorizing agent in a liquid state or in a liquid state by dissolving or dispersing the composition according to claim 1 on the surface of the porous vinyl chloride resin wallpaper obtained after applying the composition according to claim 1 on a substrate and heating and foaming it; A porous vinyl chloride resin wallpaper coated with a chemical such as an air freshener or an insect repellent.