JPH11181700A - Kenaf wall paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide wall paper safe for environments and having excellent designability. SOLUTION: This wall paper is obtained by laminating a surface layer containing the fibers of kenaf, broad-leaved trees and needle-leaved trees as raw materials to a paper substrate. The kenaf fibers are contained in an amount of 10-80 wt.% in the fibers for forming the surface material. The surface material is preferably embossed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an environmentally friendly wallpaper.

[0002]

2. Description of the Related Art Vinyl wallpapers containing a polyvinyl chloride resin as a component have been known. However, when these wallpapers are burned after being discarded, harmful components such as dioxin may be generated.

On the other hand, to protect the global environment, there is a movement to stop cutting down timber, particularly timber of southern timber, and in response, the use of non-timber paper is encouraged. Non-wood paper materials include kenaf fiber, a mallow annual. However, paper with 100% kenaf fiber was hard and could only be used for postcards and the like.

As a wallpaper using kenaf fiber, Japanese Patent Application Laid-Open No. 5-295698 discloses that kenaf is used as a part of a pattern paper used as a wallpaper. Also, JP-A-8-9
Japanese Patent No. 2898 discloses that kenaf pulp is used for a foamed and embossed base material impregnated with a liquid containing foamed microcapsules.

[0005]

However, conventionally, in the case of wallpaper using kenaf pulp, the wet strength (tear strength when wet,
And wet tensile strength. ), Flexibility, and elongation in water are inferior to wood paper for wallpaper, and there were problems in construction, such as breakage by the glue applied to the wallpaper.

[0006]

The gist of the present invention is to solve the above-mentioned problems and to provide a kenaf wallpaper characterized in that a paper surface material made of kenaf, hardwood, and softwood is laminated on a paper base material. I do.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The wallpaper of the present application will be briefly described with reference to the drawings. Reference numeral 1 denotes a paper base, which may be a normal paper base, but recycled paper can also be used. A paper surface material 3 is laminated on a paper base material. Paper surface material is kenaf fiber, hardwood fiber,
It is established by the combination of softwood fibers.

[0008] Generally, kenaf fiber is 10 to 80%,
Each fiber of softwood and hardwood is blended in a width of 10 to 50%. Softwood fibers make the paper harder, and hardwood fibers are softer and softer. By changing the mixing ratio according to the application, an arbitrary texture and strength can be obtained.

The ratio of paper to which non-wood fibers are added is 1
If it exceeds 0%, it is certified as non-wood paper. Further, if the surface paper is treated with a resin such as an acrylic ester, the stain resistance is improved. The face paper is laminated on the paper substrate and embossed. Kenaf paper is bulky and easily embossed, and as a result, a wallpaper having a high design quality is obtained.

The obtained wallpaper had no joints because the seams did not extend during construction. Further, the releasability, that is, the removability after application of the adhesive was high, and the construction efficiency was also improved.

An embodiment of the present invention will be described below. However, the present invention is not limited to the embodiment. Unless otherwise specified, “%” indicates “% by weight”. Kenaf fiber 70%, hardwood fiber 20
% And a softwood fiber of 10% is printed with a gravure roll on the upper layer paper and patterned. Further, an appropriate embossing is applied with an embossing roll, and the upper layer paper and a base paper for a normal paper wallpaper coated with an adhesive are bonded with a bonding machine, and a methacrylic acid resin is formed on the upper layer paper surface, Alternatively, an acrylic resin was applied and dried to obtain a kenaf wallpaper of the present application shown in FIG.

(Comparative Example 1) A paper wallpaper was obtained by the same method using the same base paper as that of the example and an upper layer paper of 100% kenaf fiber. (Comparative Example 2) 50% of hardwood fiber and 50% of softwood fiber
The paper paper was obtained by the same method using the same base paper as in the examples.

Test Example 1 Wet Tensile Strength Wet Condition Place a water-absorbing sponge in the center of the tray, and pour water until the lower half of the sponge is soaked. Three test pieces are placed on a water-absorbing sponge, and a weight is placed on each test piece. (Weight: 750g ± 20g, ground contact: 50mm ×
After 5 minutes (300 mm plastic plate), remove the weight and wipe off excess water.

Wet tensile strength test A test piece (15 mm x 200 mm) was gripped with a spacing of 180
mm and a tensile speed of 100 mm / min, and the maximum strength up to the time when the test piece was completely cut was measured. The results are shown in Table 1.

[0015]

[Table 1]

Test Example 2 Wet Tear Strength The wet condition was the same as above. Test piece (JISK
6301 dumbbell B type No. 2) 50mm between grips,
The sample was pulled at a pulling speed of 100 mm / min, and the maximum strength up to the time when the test piece was completely cut was measured. The results are shown in Table 2.

[0017]

[Table 2]

Test Example 3 Joint Litter Condition Test piece (300 mm × product width), glue (aminol: water =
10: 7) and gypsum board at room temperature 20
Condition for at least 24 hours in a constant temperature room at 60 ° C. and 60% humidity.

Joint test A glue was applied to a test piece, and the two pieces were joined together with both ears. After 10 minutes and 30 minutes, the test piece was cut to a certain size, and the test piece on the back side was attached to a gypsum board. . Further, the center portion was cut straight with a cutter, dried with a constant temperature drier, and the joint clearance of the test piece was measured. The results are shown in Table 3.

[0020]

[Table 3]

The condition is the same as that of the joint. Glue is evenly applied to the back surface of the test piece, bent at right and left at 1/4 of the short side in parallel with the long side direction of the test piece (450 mm x product width), and 35 mm perpendicular to the bending direction using a cutter. Cut to width, cut off and paste on gypsum board. The test piece was peeled off from the gypsum board at regular time intervals, and the time when the backing paper was adhered to the gypsum board was defined as the peeling time of the test piece with the base, and is shown in Table 4.

[0022]

[Table 4]

[0023]

According to the wallpaper of the present invention, it is possible to obtain a wallpaper having a design property by a bulky emboss and a small environmental load. At the time of construction, suitable dimensional stability, releasability with the substrate, tear strength, etc. are obtained, and the workability is significantly improved compared to wallpaper using 100% kenaf fiber paper, and almost inferior to conventional paper wallpaper. Did not. Also, good dimensional stability and the like were obtained after the construction.

[Brief description of the drawings]

FIG. 1 is a sectional view in the thickness direction of an embodiment of a wallpaper according to the present invention.

[Explanation of symbols]

 1. Paper base material 3. Surface paper mixed with kenaf fiber

Claims (3)

[Claims] 1. A kenaf fiber, a hardwood fiber,
A kenaf wallpaper, wherein a paper surface material made of softwood fiber is laminated. 2. The wallpaper according to claim 1, wherein kenaf fibers are present in an amount of 10 to 80% by weight of the fibers forming the surface material. 3. The method according to claim 1, wherein the surface material is embossed.
Or the wallpaper of claim 2.