JP2006200046A - Wallpaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain wallpaper which has no elongation by water, excellent dimensional stability, is separated and peeled in uniform thickness between layers of a sheetlike substrate (backing paper) in repairing and in which new wallpaper is simply pasted to a wall member without substrate treatment. <P>SOLUTION: The wallpaper is mixed paper comprising a sheetlike substrate in which mixed layers obtained by intertangling 35-70 wt.% of a plastic fiber with 65-40 wt.% of natural pulp and bonding them are made in a two-layer constitution. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a wallpaper in which at least a foamed resin layer is provided on a sheet-like base material, particularly when the end portion is attached to the surface of a wall member with starch paste or the like, and a gap is formed in the joint portion. Further, the present invention relates to a wallpaper characterized in that dimensional stability is improved so as to prevent the sheet from being pushed up and the sheet-like base material can be easily peeled off at a uniform thickness at the time of replacement.

  Conventionally, a wallpaper in which a foamed resin layer made of a foamable polyvinyl chloride resin composition in which a filler such as aluminum hydroxide is blended is provided on the surface of a paper-based sheet-like base material made of plant fibers or other fibers. It has been known.

  The wallpaper having such a configuration expands and contracts due to the influence of moisture and has poor dimensional stability. Moreover, when peeling off from a wall member at the time of replacement, it is difficult to remove it neatly, and it may take a lot of time for the substrate treatment before applying a new wallpaper.

  The present invention has been made to solve the above-mentioned problems, and the problem is that there is little expansion and contraction due to moisture absorption, water absorption, etc., excellent dimensional stability, and sheet-like base material at the time of replacement An object of the present invention is to provide a wallpaper which can be separated and peeled with a uniform thickness between layers of (backing paper) and can be easily applied with a new wallpaper without subjecting the wall member to a ground treatment.

  The present invention has been made to solve such problems, and the invention according to claim 1 is a wallpaper in which at least a foamed resin layer is provided on a sheet-like base material, The base material is a mixed paper in which a mixed paper layer in which plastic fibers and natural pulp are entangled and glued at a ratio of 35 to 60% by weight and 65 to 40% by weight is formed into a two-layer structure. It is a wallpaper.

  The invention according to claim 2 is the wallpaper according to claim 1, wherein the plastic fiber in the sheet-like base material is any one of polyester fiber, polyethylene fiber, polypropylene fiber, vinylon fiber, and rayon fiber. It is characterized by that.

  Furthermore, the invention according to claim 3 is the wallpaper according to claim 1, wherein the foamed resin layer is a foam mainly composed of a foamed polyvinyl chloride resin, a foamed aqueous emulsion resin or a foamed polyolefin resin. It consists of a functional resin composition.

  Since the wallpaper of the present invention is configured as described above, it has very little expansion and contraction due to moisture absorption, water absorption, etc., has excellent dimensional stability, and is evenly applied between the layers of the sheet-like substrate (backing paper) at the time of replacement. Since it can be separated and peeled at a certain thickness, a part of the sheet-like base material that has been separated and left on the wall member is positioned at a uniform thickness, and the wall member has a base treatment such as a smoothing treatment. New wallpaper can be easily and neatly pasted without having to do it.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory diagram showing a schematic cross-sectional structure of a wallpaper according to the present invention. As can be seen from the drawings, the wallpaper 1 is provided by laminating a foamed resin layer 5 on a two-layered sheet-like substrate 2.

  The sheet-like base material 2 is formed by making two layers of mixed paper layers 3 and 4 in which plastic fibers and natural pulp are entangled and glued at a ratio of 35 to 60% by weight and 65 to 40% by weight, respectively. Mixed paper.

  As described above, the sheet-like base material 2 having such a configuration makes it possible to extremely reduce expansion and contraction due to moisture absorption, water absorption, and the like. It can be easily separated with a uniform thickness at the interface of the mixed paper layer), and the structure of the mixed paper is formed by two layers of the mixed paper layer 3 and the mixed paper layer 4, and each mixed paper By making the layers 3 and 4 entangled with each other in a ratio of 35 to 60% by weight and 65 to 40% by weight of plastic fibers and natural pulp, the above-described effects can be expressed. It is a thing. Such an effect becomes remarkable when the ratio of the plastic fiber in the sheet-like substrate (mixed paper) becomes 35% by weight or more.

  Incidentally, in the entanglement of the plastic fiber and the natural pulp constituting the mixed paper layer in the mixed paper of the two layers of the mixed paper layer 3 and the mixed paper layer 4, the natural fiber of the natural pulp can be reduced by making the plastic fiber less than 35% by weight. If the ratio increases, the ratio of entanglement with natural pulp increases, the interlayer strength becomes too strong (the interlayer peel strength exceeds 70 N / m), and peeling between layers becomes difficult. In addition, when the proportion of natural pulp is increased in this way, it becomes easier to expand and contract due to moisture absorption and water absorption, and it shows a dimensional change of 0.3% or more, and the wallpaper is pasted with its ends attached together. Then, it becomes easier for gaps and push-ups to occur at the joints due to subsequent moisture absorption and desorption.

  On the other hand, if the proportion of the plastic fiber exceeds 60% by weight, the delamination strength becomes less than 30 N / m. Therefore, the proportion of entanglement with natural pulp decreases, the interlaminar strength becomes too weak, and the self-weight after pasting There is a risk of peeling. Further, when the mixing ratio of the plastic fibers is relatively increased, the fluffing is easily noticeable.

  Specific examples of the plastic fiber that is one of the materials for forming the sheet-like substrate 2 include polyester fiber, polyethylene fiber, polypropylene fiber, vinylon fiber, and rayon fiber. The fiber length is preferably about 1 to 7 mm. If the fiber length is less than 1 mm, there is a possibility of causing aggregation when a sizing agent or a filler is added and dispersed to prepare a paper stock. If the fiber length exceeds 7 mm, fluffing etc. may occur on the sheet-like base material produced. It tends to occur and lacks smoothness.

  On the other hand, the foamed resin layer 5 formed on the sheet-like substrate 2 having such a structure is mainly composed of a resin such as polyvinyl chloride resin, aqueous emulsion resin, polyolefin resin, and the like. In the case of a polyvinyl chloride resin, a filler is formed by foaming a resin layer formed of a foamable resin composition obtained by further blending a plasticizer and the like.

  As a method of providing the resin layer on the surface of the sheet-like substrate 2, for example, when a foaming polyvinyl chloride resin is used as a forming material, if it is a paste resin type, a coating method is adopted, In the case of a straight resin type, a calendar method or an extrusion method may be employed, and a foamed resin layer can be obtained by foaming the resin layer after the resin layer is formed.

Examples of the foamable resin composition constituting the foamed resin layer 5 include resins such as acrylic esters, aromatic vinyl compounds, SBR, vinyl acetate, ethylene-vinyl acetate copolymers, silicone, polyurethane, and polybutene. A water-based emulsion type that is mainly composed of a resin such as a copolymer or a core / shell two-layer structure or a blend structure and is added with a foaming agent or the like can be used. When such a foamable resin composition is used, the resin layer may be formed by a coating method.

  Furthermore, as another example of the foamable resin composition constituting the foamed resin layer 5, when a polyolefin-based one is used, polyethylene, polypropylene, polybutene, polyisoprene, ethylene-propylene copolymer, ethylene -Select an appropriate resin from vinyl acetate copolymer, ethylene-α-olefin copolymer, propylene-α-olefin copolymer, ethylene-ethyl acrylate copolymer, ionomer, etc., and add foaming agent etc. The polyolefin type thing formed can also be mentioned. Moreover, what is necessary is just to form a resin layer by a calendar system or an extrusion system, when using such a foamable resin composition. And the resin layer of such a structure can also be made into the foamed resin layer 5 by carrying out heat foaming.

  Examples of the present invention will be described below.

Using a paper stock prepared by adding 40% by weight of polyester fiber, 10% by weight of polyethylene fiber and 50% by weight of natural pulp, and adding sizing agent and filler, etc., using a test paper machine Paper making was performed at a basis weight of 40 g / m ² to prepare a first mixed paper layer. After that, the paper with the same composition is made on the mixed paper layer again with a basis weight of 40 g / m ² , and the second mixed paper layer is laminated to make a paper sheet having a two-layer structure (mixed paper) )

  Next, using a foamable polyvinyl chloride resin composition of the paste resin specification showing the composition below, coating on one surface of the sheet-like base material obtained in the above step with a bar coater, resin A layer was formed. Thereafter, a pattern is printed on the resin layer with a gravure printing machine, and a foamed resin layer subjected to heat foaming and embossing at 190 ° C. at the same time is formed to form Example 1. I got this wallpaper.

  The wallpaper according to Example 2 for comparison was made under the same conditions as in Example 1 except that the blending ratio of polyester fiber, polyethylene fiber, and natural pulp was 60% by weight, 10% by weight, and 50% by weight, respectively. Created.

The wallpaper according to Example 3 for comparison was made under the same conditions as in Example 1 except that the mixing ratio of polyester fiber, polyethylene fiber and natural pulp was 10% by weight, 10% by weight and 80% by weight, respectively. Created.
<Composition of foamable polyvinyl chloride resin composition>
Vinyl chloride paste resin 100 parts by weight Diisononyl phthalate 60 parts by weight Azodicarbonamide 5 parts by weight Aluminum hydroxide 80 parts by weight Next, the following evaluation was performed on the wallpaper according to each example. The results are shown in Table 1.
<Fuzzy evaluation>
The surface of the sheet-like substrate thus made was visually observed to evaluate the fluff. In the evaluation, a surface having a smooth surface was marked with ◯, and a surface with other conditions was marked with ×.
<Water stretch evaluation>
Each wallpaper is cut into a rectangular shape with a length of 0.3m and a width of 1m, then immersed in water for 30 minutes, then taken out, measured immediately after being taken out, and measured after 24 hours of air drying. The degree of water elongation (%) and the degree of water shrinkage (%) were calculated based on the rate of change with respect to the water, and the water stretchability was evaluated.
<Evaluation of workability>
Each wallpaper was cut to 1.8 m (vertical) × 0.9 m (horizontal) and pasted on a gypsum board, and a cut was made in the center of the wallpaper pasted with a cutter knife. Then, water was sprayed with a spray, and after 24 hours, it was observed whether the cuts were conspicuous or inconspicuous, and the workability was evaluated.
<Measurement of delamination strength>
Each wallpaper was cut into a rectangular shape of 25 mm × 200 mm, and the peel strength between layers was measured with a tensile tester.

以上のような評価を行った結果、実施例１に係る壁紙は、毛羽評価、水伸度、水縮度、施工性評価、層間剥離強度が共に満足するものであった。

As a result of the evaluation as described above, the wallpaper according to Example 1 satisfies the fuzz evaluation, water elongation, water shrinkage, workability evaluation, and delamination strength.

It is explanatory drawing which shows an example of the schematic cross-sectional structure of the wallpaper based on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Wallpaper 2 ... Sheet-like base material 3, 4 ... Mixed paper layer 5 ... Foamed resin layer

Claims (3)

  A wallpaper in which at least a foamed resin layer is provided on a sheet-like base material, wherein the sheet-like base material is intertwined with plastic fibers and natural pulp at a ratio of 35 to 60% by weight and 65 to 40% by weight, respectively. A wallpaper characterized in that it is a mixed paper in which the mixed paper layers are made into a two-layer structure.   The wallpaper according to claim 1, wherein the plastic fiber in the sheet-like base material is any one of a polyester fiber, a polyethylene fiber, a polypropylene fiber, a vinylon fiber, and a rayon fiber.   2. The wallpaper according to claim 1, wherein the foamed resin layer is made of a foamable resin mainly composed of a foamed polyvinyl chloride resin, a foamed aqueous emulsion resin, or a foamed polyolefin resin.

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