JP2015030953A - Antiviral vinyl chloride-based resin wall paper and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antiviral vinyl chloride-based resin wall paper having an excellent appearance which promptly reduces the viral titer of a virus that came into contact therewith to inactivate the virus, and suppresses a generation of foam due to a sulfonic acid-based surfactant.SOLUTION: The antiviral vinyl chloride-based resin wall paper includes: a polyvinyl chloride-based resin layer that contains 100 pts.wt. of a polyvinyl chloride-based resin obtained by blending 10-90 pts.wt. of a vinyl chloride-based resin for paste and 90-10 pts.wt. of a suspension vinyl chloride-based resin and 0.5-7 pts.wt. of a sulfonic acid-based surfactant; and a substrate layer. A vinyl chloride-based resin composition used for the polyvinyl chloride-based resin layer is made thin by a melting forming method and is laminated on the substrate layer.

Description

  The present invention relates to an antiviral vinyl chloride resin wallpaper and a method for producing the same.

Viral diseases such as severe respiratory infection (SARS) virus, avian influenza virus, foot-and-mouth disease virus, and new influenza virus are becoming social problems one after another. Originally, the host range of viruses is limited, and it is normal that only mammals infect mammals and only birds infect birds. However, since avian influenza virus is a virus with a wide host range that can infect not only birds but also mammals, it may infect humans. At present, the H5N1 avian influenza virus is widespread in Asia and Europe, and there is a fear of a pandemic (infection explosion) due to the emergence of a highly toxic influenza mutated based on it. Therefore, development of materials that exhibit antiviral properties and materials that can impart antiviral properties is desired in order to take measures against pandemics.
In particular, inactivation of viruses is particularly desired in architectural interior materials such as wallpaper made of polyvinyl chloride resin used in medical facilities that are expected to come into contact with viruses.

Patent Document 1 discloses a sheet obtained by mixing an antiviral property-imparting composition containing regenerated collagen fibers or regenerated collagen powder with a polyurethane resin and coating a soft PVC sheet.

JP 2009-127163 A

The inventors have found that a polyvinyl chloride resin composition comprising a polyvinyl chloride resin and a sulfonic acid surfactant exhibits high antiviral performance. Therefore, as a result of further investigation, anti-viral properties were obtained by applying a polyvinyl chloride paste sol, which was made by adding a plasticizer and a sulfonic acid surfactant to a polyvinyl chloride resin for paste, onto a substrate such as ordinary pulp paper. A wallpaper having was obtained. However, in the polyvinyl chloride paste sol to which a sulfonic acid surfactant is added, bubbles are generated in the polyvinyl chloride paste sol depending on the amount of addition or stirring conditions, and bubbles are generated in the coated polyvinyl chloride paste sol layer. There was sometimes a torn mark. Such traces of bubbles will result in poor appearance of the wallpaper.
That is, wallpaper coated with a polyvinyl chloride paste sol in which a plasticizer and a sulfonic acid surfactant are added to the polyvinyl chloride resin for paste has foam marks due to the generation of bubbles in the polyvinyl chloride paste sol. In some cases, the appearance of the wallpaper was poor.

  Therefore, in view of the above situation, the present invention aims to obtain an antiviral vinyl chloride resin wallpaper that is excellent in antiviral properties and excellent in appearance with suppressed foaming caused by a sulfonic acid surfactant. To do.

The means used by the present invention to solve the above-mentioned problem is to mix a vinyl chloride resin for paste, a suspension vinyl chloride resin, and a sulfonic acid surfactant, and form a solid polyvinyl chloride resin composition. A wallpaper having a resin layer and a base material layer.
More specifically, 100 parts by weight of a polyvinyl chloride resin obtained by mixing 10 to 90 parts by weight of a vinyl chloride resin for paste and 90 to 10 parts by weight of a suspension vinyl chloride resin, and a sulfonic acid type An antiviral vinyl chloride resin wallpaper comprising a resin layer containing 0.5 to 7 parts by weight of a surfactant and a base material layer.

  ADVANTAGE OF THE INVENTION According to this invention, while being excellent in antiviral property, this invention can obtain the antiviral vinyl chloride resin wallpaper which is excellent in the external appearance which suppressed generation | occurrence | production of the foam by a sulfonic acid type surfactant.

Hereinafter, the present invention will be described in detail.
As an embodiment of the present invention, 100 parts by weight of a polyvinyl chloride resin obtained by mixing 10 to 90 parts by weight of a vinyl chloride resin for paste and 90 to 10 parts by weight of a suspension vinyl chloride resin, sulfone An antiviral vinyl chloride resin wallpaper comprising a resin layer containing 0.5 to 7 parts by weight of an acid surfactant and a base material layer.

Here, when a sulfonic acid surfactant is added to a paste sol in which a plasticizer is blended with a vinyl chloride resin for paste, bubbles may be generated in the paste sol. And when it coats with the foam in paste sol remaining, the trace which bubble-breaked will remain in the resin layer after coating, and will become the external appearance defect of wallpaper.
In an embodiment of the present invention, a predetermined amount of a vinyl chloride resin for paste and a suspension vinyl chloride resin are mixed, so that a polyvinyl chloride resin that is a solid compound, regardless of coating with a paste sol. The composition can be molded to obtain a wallpaper. Thereby, generation | occurrence | production of the bubble in paste sol and the appearance defect of the wallpaper by the trace of a bubble can be solved.

  The vinyl chloride resin for paste is a vinyl chloride resin composed of fine particles having a particle diameter of 0.02 to 20.0 μm, which is mainly obtained by an emulsion polymerization method or a microsuspension polymerization method. It is a general feature that a paste is formed by adding a liquid such as.

  As a method for producing the vinyl chloride resin for paste, any production method can be used as long as the vinyl chloride resin for paste can be obtained. The most common method is to use a vinyl chloride monomer as a seed with emulsion polymerization method in which polymerization is performed with gentle stirring together with deionized water, emulsifier and water-soluble polymerization initiator, and particles obtained by emulsion polymerization method. Seed emulsion polymerization method for emulsion polymerization, vinyl chloride monomer mixed with deionized water, emulsifier, emulsification aid such as higher alcohol if necessary, oil soluble polymerization initiator mixed and dispersed with homogenizer etc. Polymerization temperature 30-80 ° C. by micro-suspension polymerization method in which polymerization is carried out under stirring, seed micro-suspension polymerization method in which polymerization is carried out using a seed containing an oil-soluble polymerization initiator obtained by micro-suspension polymerization method A method of pulverizing the obtained latex after spray drying after spray polymerization. Thus, the manufacturing step of the vinyl chloride resin for paste has a polymerization process for performing polymerization and a post-process after the polymerization.

  Here, the antiviral vinyl chloride resin wallpaper exhibits antiviral properties when a predetermined amount of a sulfonic acid surfactant is added to the polyvinyl chloride resin layer. And in order to suppress the initial coloring at the time of a shaping | molding process, expressing a higher antiviral property, it is preferable that the sulfonic acid type surfactant is previously added to the vinyl chloride resin for pastes. That is, the sulfonic acid surfactant is preferably added at the stage of producing the vinyl chloride resin for paste. Here, the sulfonic acid-based surfactant can be added as an emulsifier or the like in the polymerization step. However, in this case, if the amount of the sulfonic acid surfactant added is large, the vinyl chloride resin for paste having a desired property may not be obtained due to the influence of the sulfonic acid surfactant.

  On the other hand, the sulfonic acid surfactant can be added in a post-process after polymerization. Here, the sulfonic acid surfactant is water-soluble. Further, when producing a vinyl chloride resin for paste by emulsion polymerization or seed emulsion polymerization, a latex using water as a solvent is obtained as an intermediate form after polymerization. Therefore, by adding a sulfonic acid surfactant to this latex, the sulfonic acid surfactant is well dispersed in the vinyl chloride resin. Thus, the vinyl chloride resin for pastes having a desired property including a desired amount of the sulfonic acid surfactant is obtained by adding the sulfonic acid surfactant to the latex after polymerization. Thereby, high antiviral property and the suppression effect of the initial coloring at the time of a shaping | molding process can be acquired more efficiently.

It is considered that such high antiviral properties and the effect of suppressing initial coloration are caused by the fine dispersion of the sulfonic acid surfactant in the vinyl chloride resin for paste.
That is, when the sulfonic acid surfactant is finely dispersed, the antiviral property can be exhibited more efficiently. And it is estimated that the addition amount of the sulfonic acid-based surfactant that strengthens the initial coloration during the molding process can be kept low, and as a result, the discoloration during the molding process can be further reduced.

  The average degree of polymerization of the polyvinyl chloride resin for paste is not particularly limited as long as it can be substantially molded, but an average degree of polymerization of 500 to 2000 is preferable, and an average degree of polymerization of 700 to The range of 1300 is more preferable. If the average degree of polymerization is less than 500, it is difficult to process because the viscosity at the time of melting is low.

  When using a polyvinyl chloride resin for paste, due to the characteristics of the polyvinyl chloride resin for paste, when a liquid such as a plasticizer is mixed, it becomes a paste at room temperature. The appearance of the wallpaper is a problem. Here, it is conceivable to avoid appearance defects due to traces of bubbles by molding by heating and melting rather than coating of paste sol. However, if the paste sol consisting of these resin compositions is heated and melted, it will be handled significantly. Inferior to sex. Therefore, when the resin composition is melted by heating, kneaded, shaped and then cooled and solidified, it is preferably blended with a suspension vinyl chloride resin. Examples of such a melt shaping method include a molding method including an extrusion process and a calendar process, and examples thereof include extrusion molding, injection molding, blow molding, calendar molding, and roll molding.

  More specifically, when a sulfonic acid surfactant is added to the paste sol, foam may be generated in the paste sol depending on the stirring conditions and the amount of the sulfonic acid surfactant added. By processing, the traces of bubbles remain in the resin layer. Therefore, by heating and melting this paste sol, it is formed into a sheet by extrusion or calendering, and laminated with the base material layer, thereby suppressing the generation of bubbles and preventing the traces of bubbles from remaining in the resin layer. it is conceivable that.

However, the polyvinyl chloride resin for paste made into a paste by adding a plasticizer or the like is a liquid material having fluidity. On the other hand, in the melt shaping method, mechanical equipment is designed as a solid or solid material such as pellets or powder, and liquids such as paste are applied to the melt shaping method for reasons such as leakage. In general, it is not possible. Furthermore, it is optimized so that solids such as pellets and powders can be melted and kneaded in the heating and kneading process, and if a liquid material is used for this, problems such as insufficient kneading occur. There is.
Therefore, when using a polyvinyl chloride resin for paste, it is blended with a suspension vinyl chloride resin to obtain a solid polyvinyl chloride resin composition. Vinyl resin wallpaper can be easily molded. Thus, it is possible to obtain an antiviral vinyl chloride resin wallpaper that suppresses the generation of bubbles and prevents the traces of bubbles from remaining in the resin layer.

  In this way, by using the polyvinyl chloride resin for paste to which a sulfonic acid surfactant is added in the production process of the vinyl chloride resin, it is possible to prevent high antiviral properties and initial coloring during processing, and further, suspension chloride. By mixing with a vinyl-based resin, handling properties are improved in the melt shaping method, and a vinyl chloride-based resin composition having good processability is obtained. An antiviral vinyl chloride resin wallpaper can be obtained.

  Here, the suspension vinyl chloride resin is a porous amorphous vinyl chloride resin having a particle diameter of about 50 to 200 μm and obtained mainly by a suspension polymerization method. Since the liquid such as a plasticizer is absorbed by having this porous shape, it can be prevented from becoming a paste even if a liquid such as a plasticizer is added.

  The blend ratio of the vinyl chloride resin for paste and the suspension vinyl chloride resin is not particularly limited as long as the sulfonic acid-based surfactant contains 0.5 to 7% by weight and molding processing is not a problem. 90 to 10% by weight of vinyl chloride resin for paste, 10 to 90% by weight of suspension vinyl chloride resin, 70 to 20% by weight of vinyl chloride resin for paste and 30 to 80% by weight of suspension vinyl chloride resin More preferably, the vinyl chloride resin for paste is 50 to 20% by weight, and the suspension vinyl chloride resin is more preferably 50 to 80% by weight.

  The average degree of polymerization of the suspension polyvinyl chloride resin is not particularly limited as long as it can be substantially molded. However, the average degree of polymerization is preferably in the range of 500 to 2000, and the average degree of polymerization is 700. The range of ˜1300 is more preferable. If the average degree of polymerization is less than 500, it is difficult to process because the viscosity at the time of melting is low.

Examples of the sulfonic acid surfactant used in the present invention include alkylbenzene sulfonic acid compounds, alkyl diphenyl ether disulfonic acid compounds, alkyl naphthalene sulfonic acid compounds, alkyl sulfate esters, polyoxyethylene alkyl sulfate esters, naphthalene sulfones. Examples include acid formalin condensate compounds. Of these, alkylbenzenesulfonic acid compounds, alkyldiphenyl ether disulfonic acid compounds, and alkylnaphthalenesulfonic acid compounds are preferable from the viewpoint of excellent antiviral properties, and alkylbenzenesulfonic acid compounds that are particularly excellent in antiviral properties are more preferable.
In the sulfonic acid surfactant used in the present invention, the sulfonic acid group has a high affinity with, for example, influenza virus neuramidase, and can exhibit an inhibitory action. In addition, the structure of the functional group has an influence on the approach to the neuraimidase, and a structure that is not bulky and hardly receives steric hindrance is important. In that respect, alkylbenzene sulfonic acid surfactants are preferred, and dodecylbenzene sulfonic acid is particularly preferred.
Furthermore, as the sulfonic acid surfactant, a sulfonate surfactant is preferable. Specifically, alkali metal salts such as sodium salt and potassium salt, and alkaline earth metal salts such as calcium and barium are preferable. Can be used. In particular, sodium dodecylbenzenesulfonate (DBS) is preferred.
Further, a plurality of sulfonic acid surfactants may be added as long as antiviral properties are not inhibited, and addition of other types of surfactants is not limited.

In order to impart antiviral properties, it is preferable to add 0.5 to 7 parts by weight of a sulfonic acid surfactant to 100 parts by weight of the polyvinyl chloride resin.
0.5-5 weight part is more preferable, and 1.0-4.0 weight part is further more preferable. If the amount is less than 0.5 parts by weight, the antiviral property when the sheet is made of an antiviral vinyl chloride resin is poor, and if it exceeds 7 parts by weight, the processing becomes difficult and the initial coloration increases.

  In addition, when the sulfonic acid surfactant is added to the polyvinyl chloride resin for paste, the content of the sulfonic acid surfactant is preferably 1 to 15% by weight in the polyvinyl chloride resin for paste, 10 weight% is further more preferable and 1 to 7.5 weight% is especially preferable. If it is less than 1% by weight, the antiviral property when the sheet is made of an antiviral vinyl chloride resin is poor, and if it exceeds 15% by weight, the productivity when producing the vinyl chloride resin for paste may be poor. .

Here, when producing wallpaper using a vinyl chloride resin, it is common to add a plasticizer in order to improve flexibility (soft touch) and workability when constructing the wallpaper. Is.
Examples of the plasticizer include phthalate plasticizers such as DOP (di-2-ethylhexyl phthalate), DINP (diisononyl phthalate), and DIDP (diisodecyl phthalate), DOA (di-2-ethylhexyl adipate), DIDA ( Adipic acid ester plasticizers such as diisodecyl adipate), sebacic acid ester plasticizers such as DOS (di-2-ethylhexyl sebacate), azelaic acid ester plasticizers such as DOZ (di-2-ethylhexyl azelate), etc. Phosphate ester plasticizers such as aliphatic dibasic ester plasticizers, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, tris phosphate (isopropylated phenyl), tris phosphate (dichloropropyl), etc. Polyester plasticizer Poxy plasticizers, sulfonic acid ester plasticizers and the like can be mentioned. Examples of plasticizers having good compatibility with vinyl chloride resins include phthalate ester plasticizers and high molecular weight polyester plasticizers. The plasticizer may be used alone or in combination of a plurality of types.

  The addition amount of the plasticizer is preferably 10 to 100 parts by weight with respect to 100 parts by weight of the vinyl chloride resin. When the addition amount of the plasticizer exceeds 100 parts by weight, the resin composition tends to be in a paste form, and the handling properties before heating and melting may be inferior. If the amount is less than 10 parts by weight, processing by the melt shaping method becomes difficult and flexibility required for wallpaper cannot be achieved. The amount of the plasticizer added is preferably 20 to 90 parts by weight, more preferably 30 to 80 parts by weight.

A foaming agent may be used in the polyvinyl chloride resin composition used for the antiviral vinyl chloride resin wallpaper in the present invention, if necessary, but the amount added is 0 with respect to 100 parts by weight of the resin component. It is desirable to limit to 0.01 parts by weight or more and 15 parts by weight or less, preferably 0.1 parts by weight or more and 12 parts by weight or less, more preferably 1 part by weight or more and 10 parts by weight or less. If it exceeds 15 parts by weight, it may cause poor appearance due to coarse foamed cells, discoloration due to unfoamed residues and by-products, and the like.

In addition, in order to require smoothness, strength, and the like for the antiviral wallpaper of the present invention, it is also one of preferred embodiments of the present invention to substantially not include a foaming agent.

As the blowing agent used in the present invention, known ones can be used. For example, azodicarbonamide (ADCA), azobisformamide (ABFA), azobisisobutyronitrile (AIBN), oxybenzenesulfonyl hydrazide (OBSH), Paratoluenesulfonyl hydrazide (TSH) etc. are mentioned.

The polyvinyl chloride resin composition used for the antiviral vinyl chloride resin wallpaper of the present invention preferably contains a stabilizer, a filler and a processing aid.

The stabilizer is not particularly limited, and examples thereof include a barium (Ba) stabilizer, a calcium stabilizer, a tin stabilizer, a zinc (Zn) stabilizer, a potassium stabilizer, and the like. You may use together.

  The filler is not particularly limited. In addition to calcium carbonate and silica, plate fillers such as talc and mica, clays such as bentonite and calcined kaolin, metal oxides such as magnesium oxide and alumina, magnesium hydroxide, water Inorganic fillers such as metal hydroxides such as aluminum oxide can be used. The filler may be subjected to various surface treatments such as fatty acids and modified fatty acids in order to increase the affinity with the vinyl chloride resin, such as calcium carbonate, magnesium carbonate, titanium oxide, magnesium silicate, diatomaceous earth, etc. Two or more kinds may be used in combination.

The addition amount of the filler is preferably 1 to 100 parts by weight with respect to 100 parts by weight of the vinyl chloride resin. When the added amount of the filler exceeds 100 parts by weight, the smoothness of the surface of a molded article such as a sheet obtained by molding the antiviral vinyl chloride resin composition may be inferior. On the other hand, if the amount is less than 1 part by weight, the effect of improving workability may not be obtained. The addition amount of the filler is preferably 10 to 80 parts by weight.

An acrylic polymer processing aid is preferably added to the composition for an antiviral vinyl chloride resin wallpaper for the purpose of improving processability. Examples of the acrylic polymer processing aid include acrylic polymer processing aids such as methyl methacrylate-alkyl acrylate copolymers such as methyl methacrylate-butyl acrylate copolymers.
Addition of acrylic polymer processing aid improves the rotational flow and degassing in the bank during roll molding and calendar molding, and the appearance of the molded product obtained by suppressing plate-out is improved. .

Further, the polyvinyl chloride resin composition used for the antiviral vinyl chloride resin wallpaper of the present invention includes an ultraviolet absorber, a light stabilizer, an ultraviolet shielding agent, a charge, as long as the antiviral property is not inhibited. Inhibitor, Conductive agent, Antioxidant, Colorant, Lubricant, Antibacterial agent, Antifungal agent, Deodorant, Formaldehyde absorber, Flame retardant, Flameproof agent, Surfactant, Optical brightener, Luminescent agent, Crosslink Other additives generally added to the resin, such as an additive, may be added as appropriate.

  Polyvinyl chloride resin composition used for antiviral vinyl chloride resin wallpaper is a mixture of paste vinyl chloride resin, suspension vinyl chloride resin and sulfonic acid surfactant using known production equipment. Can be manufactured. For example, it can be produced by uniformly mixing a vinyl chloride resin for paste, a suspension vinyl chloride resin and a sulfonic acid surfactant with a high speed stirrer, a low speed stirrer, a Henschel mixer or the like. Moreover, the antiviral vinyl chloride resin composition can also be obtained by melt-mixing the mixture obtained by mixing with a batch-type kneading mixer, Banbury mixer, kneader, extruder or the like. Moreover, after melt-mixing, it may be once pelletized and used as an antiviral vinyl chloride resin composition. It should be noted that additives such as plasticizers, stabilizers, fillers and the like can be arbitrarily added depending on each application.

  Here, in the case where a sulfonic acid surfactant is added at the manufacturing stage of the vinyl chloride resin for paste, the vinyl chloride resin for paste added with the sulfonic acid surfactant and the suspension vinyl chloride resin are added. The composition for antiviral wallpaper is obtained by mixing. Moreover, it may be melt-mixed in the same manner as described above, or may be pelletized.

An antiviral vinyl chloride resin wallpaper can be obtained by melt-molding a polyvinyl chloride resin composition and laminating a base material layer. More specifically, the antiviral vinyl chloride resin wallpaper comprises a step of mixing 10 to 90 parts by weight of a vinyl chloride resin for paste, 90 to 10 parts by weight of a suspension vinyl chloride resin, and a sulfonic acid surfactant. , A step of obtaining a polyvinyl chloride resin layer by melt-forming a polyvinyl chloride resin composed of a vinyl chloride resin for paste and a suspension vinyl chloride resin, and laminating a polyvinyl chloride resin layer and a base material layer It can manufacture with the manufacturing method which has the process to do.
Here, the addition of the sulfonic acid surfactant can be performed in a step of mixing the vinyl chloride resin for paste and the suspension vinyl chloride resin. On the other hand, from the viewpoint that the sulfonic acid-based surfactant is finely dispersed and excellent in initial colorability, it is preferable to add the sulfonic acid-based surfactant in advance at the production stage of the vinyl chloride resin for paste. In this case, a step of previously mixing 10 to 90 parts by weight of a vinyl chloride resin for paste containing a sulfonic acid surfactant and 90 to 10 parts by weight of a suspension vinyl chloride resin, and a vinyl chloride resin for paste A manufacturing method comprising a step of melt-molding a polyvinyl chloride-based resin composed of a resin and a suspension vinyl chloride-based resin to obtain a polyvinyl chloride-based resin layer, and a step of laminating the polyvinyl chloride resin layer and the base material layer Can be manufactured.
Thereby, the obtained antiviral vinyl chloride resin wallpaper can be used in various indoor spaces.

The part other than the base layer of the antiviral vinyl chloride wallpaper may be a single layer or a multilayer structure composed of a plurality of layers. However, the vinyl chloride resin layer having antiviral properties needs to be at least on the outermost surface layer of the antiviral vinyl chloride resin wallpaper.
In the case of a multilayer structure, there are no particular restrictions on the layers to be stacked. For example, a layer made of a polyvinyl chloride resin layer having antiviral properties is laminated with another polyvinyl chloride resin layer or a resin layer made of another resin according to the intended use or required physical properties. Can do.

  The antiviral vinyl chloride resin wallpaper is a step of mixing 10 to 90 parts by weight of a vinyl chloride resin for paste containing a sulfonic acid surfactant and 90 to 10 parts by weight of a suspension vinyl chloride resin. Manufactured by a manufacturing method comprising a process of melt-molding a polyvinyl chloride resin comprising a vinyl chloride resin for paste and a suspension vinyl chloride resin, such as a calender molding method or a roll molding method, and a manufacturing method of laminating a base material layer can do.

  For the mixing process in producing the antiviral vinyl chloride resin wallpaper, a known apparatus that is usually used in thermoplastic resins can be used. For example, the composition of the present invention may be uniformly mixed with a high-speed stirrer, low-speed stirrer, Henschel mixer, etc., melt-mixed with a batch-type kneading mixer, Banbury mixer, kneader, extruder, etc., and immediately molded. Moreover, after melt mixing, it may be once pelletized and then molded.

  When producing an antiviral vinyl chloride resin wallpaper, a sheet molding method can be used as a process for producing an antiviral vinyl chloride resin layer by melt shaping. As the sheet forming method, a calendar forming method or a roll forming method is preferable from the viewpoint of the thickness accuracy of the obtained sheet, and a calendar forming method is preferable from the viewpoint of speed. In addition, it can be formed by a general sheet forming method. Examples thereof include an extrusion molding method and a press molding method.

Here, when the vinyl chloride resin for paste and the plasticizer are mixed, the mixture often becomes a paste as described above. In order to form the resin composition in the form of a paste into wallpaper, a coating machine such as a paste coater is generally used, and a method of applying the paste to the base material layer is used. However, the present invention has been implemented to solve the problem of bubbles caused by using a paste-like resin composition, and a method by coating cannot be employed. Therefore, a vinyl chloride resin layer having antiviral properties is prepared by using a blender of a vinyl chloride resin for paste and a suspension vinyl chloride resin, and using an extruder or a calendar molding machine having excellent sheet moldability, and a base material for it. By providing a layer, it becomes possible to produce wallpaper.
In addition, when using an extruder or a calendar molding machine, it may be possible to laminate an antiviral vinyl chloride resin layer on the base material layer in the same process. This method is preferably used in view of production stability.

The backing material, which is a base material layer used in the antiviral wallpaper of the present invention, is not particularly limited, but ordinary pulp paper, flame retardant pulp paper, calcium carbonate paper, aluminum hydroxide paper, fleece paper, nonwoven fabric, woven fabric, A net cloth etc. are mentioned.

The antiviral wallpaper of the present invention is effective for, for example, an enveloped virus.
Examples of viruses having an envelope include Ifluenza viruses such as avian influenza virus, human influenza virus, swine influenza virus, hepatitis B virus, hepatitis C virus, human immunodeficiency virus, varicella-zoster virus, herpes simplex virus, Human herpes virus, mumps virus, RS virus and the like can be mentioned.

In addition, the antiviral wallpaper of the present invention is also effective for viruses having no envelope, for example. Examples of viruses having no envelope include parvovirus, human rhinovirus, human poliovirus, echo virus, coxsackie virus, feline calicivirus, and the like.

  The antiviral vinyl chloride resin wallpaper of the present invention may be provided with a top coat layer on the surface as long as the antiviral property is not inhibited. The topcoat layer can be provided, for example, by applying a resin composition for topcoat as a paint, and acrylic resin, urethane resin, fluorine resin, or the like can be used as the topcoat resin. . Furthermore, if the dynamic friction coefficient of the wallpaper surface can be reduced by the top coat treatment, it becomes possible to have a grade 4 or higher in a test based on the surface-enhanced wallpaper performance regulations. In this case, the coefficient of dynamic friction is preferably set to 0.5 or less, for example, in a test based on ASTM D 1894.

  Here, when the topcoat layer is provided by applying a coating agent, the coating agent is applied in a state having a fine gap in the vinyl chloride resin layer having antiviral properties. Therefore, since the sulfonic acid surfactant contained in the resin layer can be partially exposed on the surface, it is possible to attack the virus when the virus contacts the wallpaper surface. Therefore, even if a top coat layer is provided, antiviral properties are exhibited.

The antiviral wallpaper of the present invention can be provided with a printing layer on the substrate layer as long as the antiviral property is not inhibited. A known method can be used as a method for providing the print layer, and examples include gravure printing, flexographic printing, offset printing, silk screen printing, and the like. Various surface treatment agents may be used in combination for the purpose of improving the coatability of the printed layer and reducing gloss. In addition, when providing the said topcoat layer in addition to a printing layer, it is preferable to provide a topcoat layer on a printing layer. Also in this case, the printing layer is applied to the resin layer having antiviral properties with a fine gap.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited to these Examples.

Specific substance names of each compounding agent used in Examples and Comparative Examples are as follows.
Vinyl chloride resin A-1: Suspension vinyl chloride resin Average polymerization degree 1000
Vinyl chloride resin A-2: Suspension vinyl chloride resin Average polymerization degree 1300
Vinyl chloride resin B-1: Vinyl chloride resin for paste Average polymerization degree 850
(Na content of dodecylbenzene sulfonate 5.0% by weight)
Vinyl chloride resin B-2: Vinyl chloride resin for paste Average polymerization degree 850
(Na content of sodium dodecylbenzenesulfonate 7.5% by weight)
Vinyl chloride resin B-3: Vinyl chloride resin for paste Average polymerization degree 850
(Does not contain sodium dodecylbenzenesulfonate)
Plasticizer C-1: Di-2-ethylhexyl phthalate plasticizer C-2: Diisononyl phthalate stabilizer D-1: Metal soap foaming agent E-1: Azodicarbonamide (ADCA)
Filler F-1: Calcium carbonate additive G-1: Na dodecylbenzenesulfonate
Acrylic polymer processing aid: H-1

<Processability and sheeting>
The processability when a polyvinyl chloride resin layer was molded by a calendar molding method was evaluated.
◎: Good ○: Can be processed without problems △: Slightly reduced, but processing is possible ×: Processing is not possible

<Processability / Plate-out>
The plate-out to the calendar roll surface when the polyvinyl chloride resin layer was molded by the calendar molding method was evaluated.
◎: No plate-out ○: Slightly plate-out △: There is plate-out ×: There is plate-out on the entire roll surface.

<Processability and initial colorability of polyvinyl chloride resin layer>
Each composition shown in Tables 1 and 2 was kneaded for 10 minutes with a small two roll set at a roll temperature of 160 ° C. to produce a wallpaper base sheet having a thickness of about 0.3 mm. The degree of coloring was evaluated. Initial coloring degree was evaluated by yellowness.
In addition, for each of the formulations shown in Tables 1 and 2, a suspension vinyl chloride resin: a vinyl chloride resin for paste = 100: 0 and a sheet containing no sulfonic acid surfactant is used as the wallpaper base sheet. The same method and under the same conditions were used as reference sheets for each wallpaper base sheet.
Then, the yellowness of the wallpaper base sheet and the reference sheet relative to the wallpaper base sheet is obtained according to JIS K 7373 using “SM Color Computer” manufactured by Suga Test Instruments Co., Ltd. The difference in degree was defined as the yellowness difference, and the yellowness difference was evaluated according to the following evaluation criteria.
Yellowness difference = (Yellowness of wallpaper base sheet)-(Yellowness of reference sheet)
◎: Yellowness difference is less than +1.0 ○: Yellowness difference is +1.0 or more and less than +2.0 Δ: Yellowness difference is +2.0 or more and less than +3.0 ×: Yellowness difference is +3.0 or more

<Comprehensive evaluation of workability>
The processability was evaluated by comprehensively evaluating the processability, plate-out, and initial colorability when produced by the calendar molding method.
◎: Good ○: Can be processed without problems △: Somewhat bad, but processing is possible ×: Processing is impossible

<Evaluation of antiviral properties>
The avian influenza virus A / whisling swan / Shimane / 499/83 (H5N3) strain was used as a test virus. (Hereinafter referred to as H5N3 strain).
The virus grown in the chorioallantoic cavity of the developing chicken egg was diluted to 1.0 × 10 ⁶ EID ₅₀ /0.1 mL with sterile phosphate buffered saline (PBS; pH 7.2), and the test virus A liquid was prepared.

  Place the vinyl chloride resin wallpaper 5 cm × 5 cm prepared in the examples and comparative examples on a petri dish, place 0.22 ml of the test virus solution on the surface of the vinyl chloride resin wallpaper, and cover it with a 4 cm × 4 cm polyethylene film. The petri dish was capped and left in an incubator set at 20 ° C. for 1 hour. After 1 hour, the virus solution on the surface of the vinyl chloride resin wallpaper was collected, diluted 10-fold with PBS, and the diluted virus solution was added to the chorioallantoic cavity of 10-day-old chicken eggs using an injection needle. 1 mL was inoculated.

After inoculation, the embryonated chicken eggs were cultured at 37 ° C. for 2 days, and then the presence or absence of virus growth in the chorioallantoic cavity was determined by the hemagglutination test, and the virus titer (log ₁₀ EID ₅₀ /0.1 ml) was determined by the method of Reed & Muench. Was calculated.
In addition, the virus titer (log ₁₀ EID ₅₀ /0.1 ml) of the test virus solution before the test (before contacting with the vinyl chloride resin wallpaper) as a blank was also calculated according to the above procedure. The sex was evaluated by subtracting the virus titer of the virus solution after 1 hour from contacting the vinyl chloride resin wallpaper from the virus titer of the virus solution before the test. The larger this difference, the stronger the antiviral property of the vinyl chloride resin wallpaper.

A: Difference between virus titer (before test) and virus titer (after 1 hour) is 4 or more ○: Difference between virus titer (before test) and virus titer (after 1 hour) is 3 or more and less than 4 △: Difference between virus titer (before test) and virus titer (after 1 hour) is 2 or more and less than 3 ×: Difference between virus titer (before test) and virus titer (after 1 hour) is less than 2

<Examples 1 to 10>
Formulations corresponding to the polyvinyl chloride resin layers were prepared from the formulations described in Examples 1 to 10 in Table 1 by a general calendar molding method. During calendar molding, the blends of Examples 1 to 10 were uniformly mixed with a Henschel mixer, and kneaded with a Banbury mixer until the resin temperature reached 130 ° C. to prepare a melt-like polyvinyl chloride resin composition. . This was rolled using a four-roll calender molding machine having an inverted L shape adjusted to 160 ° C., and immediately after the rolled sheet-like material was peeled off from the calender roll, the sheet was coated with a base material layer. By laminating with some ordinary pulp paper and embossing, the polyvinyl chloride resin layer and ordinary pulp paper were laminated with good adhesion, and a wallpaper base was obtained. Thereafter, the base of this wallpaper was foamed at 210 ° C. and subjected to mechanical embossing to obtain a wallpaper for evaluating antiviral properties.
Here, in vinyl chloride resin B-1 used in Example 1, 5.0% by weight of sodium dodecylbenzenesulfonate was previously added to the vinyl chloride resin for paste. Therefore, to make 20 parts by weight of the vinyl chloride resin for paste, about 21.1 parts by weight of vinyl chloride resin B-1 is blended, and about 1.1 parts by weight of sodium dodecylbenzenesulfonate is added. The same applies to other examples and comparative examples.

Examples 1 to 5 are examples in which the mixing ratio of the suspension vinyl chloride resin A-1 and the vinyl chloride resin B-1 for paste was changed, and the content of the sulfonic acid surfactant in the composition was changed. is there. As the content of sulfonic acid surfactant increases, the antiviral properties of the wallpaper will improve.
Although the object of the invention is satisfactory, the workability when the polyvinyl chloride resin layer is processed with a calender is lowered.

  Examples 6 and 7 are examples in which the vinyl chloride resin B-2 for paste having a higher content of the sulfonic acid surfactant than the vinyl chloride resin B-1 for paste is used. The amount of the sulfonic acid surfactant in 100 parts of polyvinyl chloride is the same in Example 1 and Example 6, and in Example 3 and Example 7. If the amount of the sulfonic acid surfactant in 100 parts of polyvinyl chloride is the same, the antiviral property of the wallpaper is the same, but comparing Examples 1, 3 and Examples 6, 7, the sulfonic acid type When the vinyl chloride resin for paste with a high surfactant content is used, the object of the invention is satisfied, but the processability when processing the polyvinyl chloride resin layer with a calender slightly decreases. I can say that.

  Example 8 is an example in which only the type of plasticizer is changed with respect to Example 7, but even when the type of plasticizer is changed, the antiviral properties of the wallpaper and the process when the polyvinyl chloride resin layer is processed with a calendar are used. Processability is the same.

  Example 9 is an example in which a vinyl chloride resin B-3 for paste containing no sulfonic acid surfactant is used and the sulfonic acid surfactant G-1 is added by a Henschel mixer when calendering. is there. The same as in Example 3 except that B-3 was used as the vinyl chloride resin for the paste and the sulfonic acid surfactant G-1 was added during calendering. The sulfone in 100 parts of polyvinyl chloride The content of the acid surfactant is also the same. When the sulfonic acid surfactant is added at the time of calendering, the object of the invention is satisfied as compared with the case where the vinyl chloride resin for paste containing the sulfonic acid surfactant G-1 is used in advance. Antiviral properties of wallpaper and processability when processing a polyvinyl chloride resin layer with a calendar are reduced.

Example 10 is the same as Example 3 except that the foaming agent E-1 is not blended, and is an example of an embodiment in which no foaming agent is included. Example 10 does not contain a foaming agent, but as in Example 3,
The wallpaper base obtained by calendering was subjected to a foaming process at 210 ° C. and then mechanically embossed to obtain a wallpaper used for antiviral evaluation. Even when the foaming agent was not added, the processability when the polyvinyl chloride resin layer was processed with a calendar was the same, and the antiviral properties of the wallpaper were also the same.

<Comparative Examples 1-5>
Wallpapers were prepared from the formulations described in Comparative Examples 1 to 5 in Table 2 in the same manner and under the same conditions as in Examples, and antiviral properties were evaluated.

  Comparative Example 1 does not contain a vinyl chloride resin for paste containing a sulfonic acid surfactant, and uses only the suspension vinyl chloride resin A-1 as the polyvinyl chloride resin, and further uses a sulfonic acid resin during calendering. In this example, no surfactant is added. That is, in this example, a sulfonic acid surfactant is not included. In this example, the mixing ratio of the vinyl chloride resin for paste and the amount of the sulfonic acid surfactant are outside the scope of the claims. In this example, the processability when the polyvinyl chloride resin layer is processed with a calender is good, but since the sulfonic acid surfactant is not included, the antiviral property is not confirmed on the wallpaper.

  Comparative Example 2 is an example in which a vinyl chloride resin for paste containing a sulfonic acid surfactant is blended, but the blending amount is small and the amount of the sulfonic surfactant is small. Similar to Comparative Example 1, in this example, the mixing ratio of the vinyl chloride resin for paste and the amount of the sulfonic surfactant are also outside the scope of the claims. This example also has good processability when processing the polyvinyl chloride resin layer with a calender because the amount of the sulfonic acid surfactant is small, but the sulfonic acid surfactant is less than the claimed range. The antiviral property is not confirmed in the wallpaper.

  Comparative Example 3 is an example in which a vinyl chloride resin for paste containing a sulfonic acid surfactant is blended, but the blending amount is large and the amount of the sulfonic surfactant is also large. Also in this example, the mixing ratio of the vinyl chloride resin for paste and the amount of the sulfonic acid surfactant are outside the scope of the claims. Since the amount of the sulfonic acid surfactant is large, the antiviral property of the wallpaper is large, but the processability when the vinyl chloride resin layer is processed with a calendar is remarkably lowered.

  Comparative Example 4 is an example in which only a vinyl chloride resin for paste containing a sulfonic acid surfactant is used and no suspension vinyl chloride resin is blended. Also in this example, the mixing ratio of the vinyl chloride resin for paste and the amount of the sulfonic acid surfactant are outside the scope of the claims. The amount of the sulfonic acid surfactant is larger than that in Comparative Example 3, and the vinyl chloride resin layer cannot be processed with a calendar. Therefore, the wallpaper could not be prepared and the antiviral property was not evaluated.

  Comparative Example 5 is an example in which the vinyl chloride resin B-1 for paste having a lower content of the sulfonic acid-based surfactant than Comparative Example 2 is used. In this example, as in Comparative Example 1, the mixing ratio of the vinyl chloride resin for paste and the amount of the sulfonic surfactant are outside the scope of the claims. This example also has good processability when processing the polyvinyl chloride resin layer with a calender because the amount of the sulfonic acid surfactant is small, but the sulfonic acid surfactant is less than the claimed range. The antiviral property is not confirmed in the wallpaper. In addition, if the mixing ratio of the vinyl chloride resin for paste and the amount of the sulfonic acid surfactant are outside the scope of claims, the wallpaper can be used regardless of the amount of the sulfonic acid surfactant contained in the vinyl chloride resin for paste. The anti-viral properties and the processability when processing a vinyl chloride resin layer with a calender are the same.

  ADVANTAGE OF THE INVENTION According to this invention, the virus titer of the virus which contacted can be reduced rapidly, a virus can be inactivated, and a wallpaper with a favorable external appearance, ie, a design property, can be provided. The wallpaper of the present invention can be used as, for example, a wallpaper for a hospital, a nursing facility, a nursing facility, a school, a kindergarten, a public hall, a gymnasium, a station, a house, a condominium, or the like.

Claims (3)

100 parts by weight of a polyvinyl chloride resin obtained by mixing 10 to 90 parts by weight of a vinyl chloride resin for paste and 90 to 10 parts by weight of a suspension vinyl chloride resin, and 0.5% of a sulfonic acid surfactant An antiviral vinyl chloride resin wallpaper comprising a polyvinyl chloride resin layer containing -7 parts by weight and a base material layer. 100 parts by weight of a polyvinyl chloride resin obtained by mixing 10 to 90 parts by weight of a vinyl chloride resin for paste and 90 to 10 parts by weight of a suspension vinyl chloride resin, and 0.5% of a sulfonic acid surfactant A polyvinyl chloride resin layer containing ~ 7 parts by weight, and a base material layer,
An antiviral vinyl chloride resin wallpaper in which the sulfonic acid interface is added in the manufacturing stage of a vinyl chloride resin for paste. A polyvinyl chloride resin composition is prepared by mixing 10 to 90 parts by weight of a vinyl chloride resin for paste, to which a sulfonic acid surfactant is added in advance, and 90 to 10 parts by weight of a suspension vinyl chloride resin. Obtaining a step;
Forming a polyvinyl chloride resin composition into a polyvinyl chloride resin layer by thinning the polyvinyl chloride resin composition;
A step of laminating the polyvinyl chloride resin layer and the base material layer,
A method for producing an antiviral vinyl chloride resin wallpaper, wherein the sulfonic acid surfactant is contained in an amount of 0.5 to 7 parts by weight based on 100 parts by weight of the polyvinyl chloride resin.