JP2019060207A - Vinyl chloride wall paper and its manufacturing method - Google Patents

Abstract

To propose a foam vinyl chloride wall paper having a three-dimensional effect full of variety in an irregularity vinyl chloride wall paper using an intaglio printing and having an excellent workability as well and its manufacturing method.SOLUTION: A vinyl chloride wall paper is characterized in that it has a transparent ethylene-vinyl alcohol copolymer resin layer 3 on the entire surface of a paper base material 2 and it has a vinyl chloride resin foam layer 4 of two or more stages with different heights, and a total weight of the vinyl chloride resin foam layer is in a range of 50 g/mor more and 400 g/mor less.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a polyvinyl chloride wallpaper manufactured using a polyvinyl chloride paste sol, and more particularly to a polyvinyl chloride wallpaper having remarkable unevenness and excellent in workability, and a method of manufacturing the same.

Wallpaper is widely used for interiors of houses and stores. Although there are many types of wallpaper, among them, PVC wallpaper is used in large quantities because it is excellent in terms of design, performance, price, and workability, and is well balanced.
Although there are many methods for producing PVC wallpaper, the most common production method is to apply a polyvinyl chloride resin paste sol on the entire surface of a wallpaper backing paper using a knife coater or the like to a certain thickness on the entire surface, It is a method of performing printing, foaming, and embossing on this after heating and making it gelatinize and producing a printing original fabric (patent document 1). This method is a method suitable for high-mix low-volume production and widely used, since it is possible to commonly use a printing original fabric in producing wallpaper of various designs.

  Since PVC paste sol is uniformly applied to the entire surface, the PVC wallpaper produced by this method has low water permeability and moisture permeability, and as a result, the time from the application of the back paste at the time of application to the actual application (Open time) can be taken long, and it has the advantages of good construction workability.

  However, since the vinyl chloride wallpaper produced by this method must be coated with the vinyl chloride sol uniformly over the entire surface, the polyvinyl chloride paste sol is thickly coated over the entire surface in order to make a wallpaper with a large three-dimensional effect. It will have to be done. Such a wallpaper is not only expensive to produce but also heavy in weight, so it must be inferior in construction.

  Therefore, as a method of enlarging the unevenness without increasing the total amount of the polyvinyl chloride paste, it is sufficient to reduce the amount of paste in a place to be a concave and to increase the amount of paste in a place to be a convex. In the method for producing wallpaper described in Patent Document 2, a method for producing a wallpaper is described, in which a foam paste sol is raised and printed on a backing sheet for wallpaper using an embossing roll, and then heated for foaming. ing. Since the foamed paste sol is concentrated in the portion to be the convex portion, the total resin amount can be suppressed to a low level for a large difference in unevenness, and the weight can be reduced.

  The wallpaper according to the manufacturing method described in Patent Document 2 has a large moisture permeability because the amount of polyvinyl chloride paste in the recess is small, and when constructing, the open time which is the time from applying the glue to the back surface to the actual construction is sufficient I could not take it long. For this reason, it was not satisfactory in terms of workability.

  In addition, since a polyvinyl chloride paste layer can not be completely absent in the recess, as shown in FIG. 2, a solid area is required over the entire surface, which is a design restriction.

Unexamined-Japanese-Patent No. 06-270313 Japanese Patent Application Laid-Open No. 56-154599

  The problem to be solved by the present invention is to propose a polyvinyl chloride wallpaper having a three-dimensional effect rich in change and excellent in workability in a concave-convex polyvinyl chloride wallpaper using an intaglio and a method for producing the same.

As means for solving the above problems, the invention according to claim 1 has a transparent ethylene-vinyl alcohol copolymer resin layer on the entire surface of a paper substrate, and has two or more steps above it. It is a polyvinyl chloride wallpaper characterized by having a vinyl chloride resin foam layer different in length, and the total weight of the vinyl chloride resin foam layer is in the range of 50 g / m ² or more and 400 g / m ² or less.

  In the vinyl chloride wallpaper according to the present invention, since the ethylene-vinyl alcohol copolymer resin layer is provided on the entire surface of the paper substrate, the moisture permeability can be adjusted to be low, and the open time during construction can be extended. Can.

In the invention according to claim 2, the basis weight of the paper base is in the range of 50 g / m ² or more and 160 g / m ² or less, and the density is 0.4 g / cm ³ or more and 0.75 g / cm It is a polyvinyl chloride wallpaper according to claim 1, characterized in that it is in the range of ³ or less.

  The invention according to claim 3 is characterized in that the thickness of the transparent ethylene-vinyl alcohol copolymer resin layer is in the range of 0.3 μm to 10 μm. It is a PVC wallpaper.

  In the invention according to claim 4, the liquid ethylene-vinyl alcohol copolymer resin is coated on the surface of the paper substrate by a gravure coating method and dried, and then the polyvinyl chloride resin foam paste sol is formed into a plate depth The method for producing a polyvinyl chloride wallpaper according to any one of claims 1 to 3, wherein printing is performed using a gravure plate having two or more regions different from each other, and then foaming is performed.

  Since the vinyl chloride wallpaper according to the present invention has the ethylene-vinyl alcohol copolymer resin layer on the entire surface of the paper base, the moisture permeability of the wallpaper can be stably suppressed to a low level, as a result, the open time becomes long. , Construction has improved.

  In addition, since the workability is ensured by the ethylene-vinyl alcohol copolymer resin layer provided on the entire surface of the paper substrate, the degree of freedom of the vinyl chloride resin foam layer which is the decorative layer provided thereon is increased, and the design Constraints are reduced. That is, if there is no ethylene-vinyl alcohol copolymer layer, moisture permeability will increase if there is no vinyl chloride resin foam layer or there are too many areas where the coating amount is small, which may cause a problem in construction. However, as a result of the reduction of such restrictions, in the extreme case, even if there is a portion where no vinyl chloride resin foam layer is present, no problem occurs.

  In addition, the presence of a transparent ethylene-vinyl alcohol copolymer resin layer under the vinyl chloride resin foam layer which is a decorative layer produces an effect that the vinyl chloride resin foam layer looks more three-dimensional, As compared with the case of single substance, there is also an effect that the stain resistance, in particular, the stain resistance to water-soluble contaminants is improved.

When the total weight of the vinyl chloride resin foam layer is in the range of 50 g / m ² or more and 400 g / m ² or less, a well-balanced wallpaper such as designability, economy, workability, flame retardancy and the like can be obtained.

As in the invention described in claim 2, the basis weight of the paper substrate is in the range of 50 g / m ² or more and 160 g / m ² or less, and the density is 0.4 g / cm ³ or more and 0.75 g / cm ³ If it is within the following range, it will be a well-balanced wallpaper in terms of economy, workability and flame retardancy, and by the appropriate surface roughness of the paper substrate, adhesion and shape retention of polyvinyl chloride resin foam paste sol It has good properties and is also effective in terms of design.

  As in the invention according to claim 3, when the thickness of the transparent ethylene-vinyl alcohol copolymer resin layer is in the range of 0.3 μm or more and 10 μm or less, deterioration in moisture permeability can be sufficiently expected. Even without using a special coater, formation of a resin layer is possible by gravure coating using a gravure plate, and implementation is easy.

  Further, as in the invention according to claim 4, after a liquid ethylene-vinyl alcohol copolymer resin is coated on the surface of a paper substrate by a gravure coating method and dried, a polyvinyl chloride resin foam paste sol is obtained by According to the method for producing a polyvinyl chloride wallpaper characterized by printing using a gravure plate having two or more areas different in plate depth and then foaming, as described above, the ethylene vinyl alcohol copolymer resin layer It is possible to easily form a high-quality wallpaper with several types of areas with different foam heights in just one printing by using a gravure plate with several stages of plate depth area Production efficiency is good.

FIG. 1 is a schematic cross-sectional view schematically showing a cross-sectional structure in an embodiment of a PVC wallpaper according to the present invention. FIG. 2 is a cross-sectional schematic view schematically showing the cross-sectional structure of a conventional polyvinyl chloride wallpaper. FIG. 3 is a schematic cross-sectional view schematically showing a cross-sectional structure of a gravure plate used for producing a polyvinyl chloride wallpaper according to the present invention. FIG. 4 is a schematic cross-sectional view schematically showing a cross-sectional structure of a gravure plate used for producing a conventional polyvinyl chloride wallpaper. FIG. 5 is a cross-sectional explanatory view schematically showing a method for producing a polyvinyl chloride wallpaper according to the present invention.

  Hereinafter, the PVC wallpaper according to the present invention and the method for producing the same will be described in detail with reference to the drawings. FIG. 1 is a schematic cross-sectional view schematically showing a cross-sectional structure in an embodiment of the PVC wallpaper 1 according to the present invention.

The vinyl chloride wallpaper 1 according to the present invention has a transparent ethylene-vinyl alcohol copolymer resin layer 3 on the entire surface of the paper substrate 2, and a vinyl chloride resin foam pattern area having two or more different heights thereon. It has the vinyl chloride resin foam layer 4 which consists of 5-7. The PVC wallpaper according to the present invention is characterized in that the total weight of the vinyl chloride resin foam layer is in the range of 50 g / m ² or more and 400 g / m ² or less.

  In the example shown in FIG. 1, the vinyl chloride resin foam layer is composed of three different levels of height, which are derived from the three levels of plate depth provided on one gravure plate. FIG. 3 is a schematic cross-sectional view schematically showing a cross-sectional structure of a gravure plate used for producing a polyvinyl chloride wallpaper according to the present invention. In this example, on the surface of the gravure plate 25 is formed a pattern area consisting of a three-step plate depth of a pattern area 15 with a plate depth of 150 μm, a pattern area 16 with a plate depth of 300 μm and a pattern area 17 with a plate depth of 500 μm. .

  By printing and foaming a polyvinyl chloride resin foam paste sol using this gravure plate, the height of the foam layer after foaming becomes three steps, and a foam vinyl chloride wallpaper rich in variation can be obtained. That is, in FIG. 1, the vinyl chloride resin foam layer 4 is formed from three different pattern areas of the pattern area 7 based on the plate depth 500 μm, the pattern area 6 based on the plate depth 300 μm, and the pattern area 5 based on the plate depth 150 μm. It has become.

  FIG. 2 is a cross-sectional schematic view schematically showing the cross-sectional structure of a conventional polyvinyl chloride wallpaper. FIG. 4 is a schematic cross-sectional view schematically showing a cross-sectional structure of a gravure plate used for producing a conventional polyvinyl chloride wallpaper.

  In the conventional PVC wallpaper 10, the vinyl chloride resin foam layer 4 comprises a picture area 7 based on the plate depth 500 μm, a picture area 6 based on the plate depth 300 μm, and a solid area 11 based on the plate depth 150 μm. There was no difference between the two levels.

  This is because, in the case of polyvinyl chloride wallpaper using the conventional raised printing method, the moisture permeability of the entire wallpaper becomes high when there is a portion with a small amount of vinyl chloride resin paste, the open time becomes short, and the workability is inferior. It is due to the fact that a solid area 18 with a plate depth of 150 μm was required so that a certain degree of polyvinyl chloride resin layer was present.

  On the other hand, in the vinyl chloride wallpaper 1 according to the present invention, since the transparent ethylene-vinyl alcohol copolymer resin layer 3 is provided on the entire surface of the paper substrate 2, even if there is no vinyl chloride resin paste The moisture permeability can be kept small, and this makes it possible to use an area with a plate depth of 150 μm, which could only be used as a solid, as a pattern, thereby dramatically increasing the degree of freedom in design. is there.

  FIG. 5 is a cross-sectional explanatory view schematically showing a method for producing a polyvinyl chloride wallpaper according to the present invention. In the wallpaper manufacturing apparatus 20, a gravure coating method using a plate 21 in which a liquid ethylene-vinyl alcohol copolymer resin 22 is gravure-coated on the surface of the paper base 2 unwound from an unwound portion (not shown) After coating and guiding to a drying oven 23 and drying, the polyvinyl chloride resin foam paste sol 27 is printed using a gravure plate 25 having two or more areas of different plate depths, and thereafter, it is led to a foaming oven 24 After foaming and cooling, take up (cooling unit, winding unit not shown).

  According to the manufacturing apparatus as shown in FIG. 5, highly varied foam wallpaper having high designability can be obtained in only one step. However, the step of applying the ethylene-vinyl alcohol copolymer resin layer may be performed separately. Hereinafter, the vinyl chloride wallpaper according to the present invention will be more specifically described based on examples.

An ethylene-vinyl alcohol copolymer resin (Japan) is used on the entire surface of this paper using a paper backing for wallpaper (WK-685AP manufactured by KJ Special Paper Co., Ltd., basis weight 85 g / m ² , density 0.59 g / cm ³ ). Gravure coating was carried out using a gravure plate (80-ray electronic engraving plate) and dried.

Then, using a gravure plate provided with a pattern area consisting of three steps of plate depths of 500 μm, 300 μm, and 150 μm, the vinyl chloride resin foam paste having the composition shown in Table 1 is ethylene-vinyl alcohol copolymer resin layer Printed on top and foamed to obtain PVC wallpaper. The weight of the vinyl chloride resin foam layer was approximately 180 g / m ² .

Comparative Example
As a comparative example, a vinyl chloride wallpaper was obtained in the same manner as the example except that the ethylene-vinyl alcohol copolymer resin layer was not provided.

  Table 2 shows the results of comparing the open time, the design, and the stain resistance (boiled soy sauce) of the PVC wallpaper of the example and the PVC wallpaper of the comparative example. In addition, open time apply | coats aqueous | water-based glue to a back surface, closely contacts back surfaces, and measures time until peeling (interposition peeling) between papers arises.

  From the results of Table 2, the superiority of the PVC wallpaper according to the present invention is recognized.

1 ... PVC wallpaper according to the present invention 2 ... paper substrate 3 ... ethylene-vinyl alcohol copolymer resin layer 4 ... vinyl chloride resin foam layer 5 ... pattern area based on plate depth 150 μm 6 ···· Pattern area 7 based on plate depth 300 μm 7 · Pattern area 10 based on plate depth 500 μm · · · Conventional PVC wallpaper 11 · Solid area 15 based on plate depth 150 μm · · · Pattern with plate depth 150 μm Area 16 ··· Pattern area 17 with plate depth 300 μm ··· Pattern area 18 with plate depth 500 μm · · Solid area 20 with plate depth 150 · · · Wallpaper production device 21 ··················· Ethylene -Vinyl alcohol copolymer resin 23 ... Drying furnace 24 ... Foaming furnace 25 ... Gravure plate 26 for wallpaper of the present invention ... Gravure plate for conventional wallpaper 27 ... Vinyl chloride resin foam page Stosol

Claims (4)

A transparent ethylene-vinyl alcohol copolymer resin layer is provided on the entire surface of a paper substrate, and a vinyl chloride resin foam layer having two or more different heights is provided thereon, and the total of the vinyl chloride resin foam layer A PVC wallpaper characterized by having a weight in the range of 50 g / m ² or more and 400 g / m ² or less. The basis weight of the paper base material is in the range of 50 g / m ² to 160 g / m ² , and the density is in the range of 0.4 g / cm ³ to 0.75 g / cm ^3. A PVC wallpaper according to claim 1.   The thickness of the said transparent ethylene-vinyl alcohol copolymer resin layer is the range of 0.3 micrometer or more and 10 micrometers or less, The PVC wallpaper of Claim 1 or 2 characterized by the above-mentioned.   A liquid ethylene-vinyl alcohol copolymer resin is applied to the surface of a paper substrate by a gravure coating method and dried, and then a polyvinyl chloride resin foam paste sol is used as a gravure plate having two or more regions different in plate depth. The method for producing a polyvinyl chloride wallpaper according to any one of claims 1 to 3, wherein the printing is carried out and then foaming is carried out.

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