WO2018174120A1

WO2018174120A1 - Natural-wood thin paper and method for manufacturing same

Info

Publication number: WO2018174120A1
Application number: PCT/JP2018/011260
Authority: WO
Inventors: 森實　隆生
Original assignee: 株式会社ビッグウィル
Priority date: 2017-03-23
Filing date: 2018-03-22
Publication date: 2018-09-27
Also published as: JP2018158542A

Abstract

Provided is a natural-wood thin paper in which the texture of natural wood is retained, colors are visible in a clear manner, and a desired color can be obtained. Also provided is a method for manufacturing the natural-wood thin paper. A backing sheet (8) is bonded to the rear surface of an ultra-thin veneer (1) made of natural wood, and a pigment-containing resin is impregnated into the vessels of the ultra-thin veneer (1). The natural-wood thin paper (A) is produced by: a lamination/coloring step I in which the backing sheet, which is primarily made of paper or a nonwoven, is bonded using an adhesive containing a pigment raw material to the rear surface of a veneer obtained by slicing natural wood; and a grinding/polishing step II in which the backing sheet of the veneer is polished using a grinding/polishing machine to obtain an extremely thin veneer having a thickness of 0.05-0.1 mm. Because both the earlywood and latewood constituting the wood material are impregnated with the pigment-containing resin, coloring is obtained without any change to the contrast in the wood grain, and it becomes possible to finish the natural-wood thin paper into a decorative plate having a discretionary color while maintaining the characteristics of natural wood.

Description

Natural wood thin paper and its manufacturing method

The present invention relates to natural wood thin paper and a method for producing the same. More specifically, the present invention relates to a decorative thin paper that is made of natural wood and can be applied as a surface material for various types of construction products such as housing wallpaper, doors and frame materials, furniture, stationery, and miscellaneous goods.
A typical application field of thin paper for makeup is wallpaper, but generally three types of wallpaper, cloth and vinyl resin processed paper, have been used. However, the present invention relates to a thin paper that can be used as a new type of wallpaper that does not belong to any of these. That is, the present invention relates to a natural wood thin paper that uses natural wood as a main material and makes use of the texture of natural wood as it is, and a method for producing the same.

According to Patent Document 1, the present applicant has the texture of natural wood as it is, has the property of breathing with the wood of wooden houses, and is extremely thin and can be applied not only to flat surfaces but also to curved surfaces, We provide natural wood thin paper with little thickness tolerance without cracks or tears.

Since the above-mentioned natural wood thin paper makes use of the texture of natural wood as it is, it itself can be evaluated. However, it does not meet the expectation that rich colors are required from the standpoint of having different aesthetics.

In order to meet such a demand, there is a conventional technique of Patent Document 2.
In this prior art, a colored backing sheet is bonded to a thin wood plate. In this prior art, when the woody decorative sheet in use is seen, the color colored on the backing sheet is seen from the surface side of the woody thin plate. However, in the wood thin plate, the grain that appears on the surface is an important element of aesthetics. If there is only a color on the back of the wood thin plate, the contrast of the wood grain will be weakened and the whole will only be blurred. It was.

Japanese Patent No. 5415214 JP 2004-276368 A

In view of the above circumstances, an object of the present invention is to provide a natural wood thin paper that has a natural wood texture as it is and that can clearly display colors and that can obtain an arbitrary color, and a method for producing the same. .

The natural wood thin paper of the first invention has a backing sheet bonded to the back surface of a natural wood ultrathin veneer,
A dye-containing resin is infiltrated into the duct of the ultrathin veneer.
A natural wood thin paper according to a second invention is the natural wood thin paper according to the first invention, wherein the dye-containing resin is a mixture of a pigment raw material that is a pigment, a dye or a mixture thereof with an adhesive that bonds the ultrathin veneer and the backing sheet. It is characterized by being.
The natural wood thin paper of the third invention is characterized in that, in the first invention, the ultrathin veneer has a thickness of 0.05 to 0.1 mm.
According to a fourth aspect of the present invention, there is provided a method for producing a natural wood thin paper, in which a backing sheet mainly composed of paper or nonwoven fabric is adhered to a back surface of a veneer sliced from natural wood with a dye-containing resin made of an adhesive containing a pigment raw material. It is characterized by comprising a matching / coloring step and a grinding / polishing step in which the backing sheet of the veneer is polished by a grinding / polishing machine to form a very thin veneer having a thickness of 0.05 to 0.1 mm.

According to the natural wood thin paper of the first invention, since the pigment-containing resin permeates the path tube of the ultrathin veneer, the wood itself has an appearance with a color. In addition, since the dye-containing resin penetrates both the early and late woods that make up the wood grain, the wood grain contrast will not change, and the color will be maintained. It can be finished to a decorative board with
According to the natural wood thin paper of the second invention, the dye-containing resin soaks in from the back surface of the ultrathin veneer and is well filled into the canal so that the color clearly appears in the appearance.
According to the third aspect of the invention, since the ultrathin veneer is very thin, the internal stress when bent is reduced, and even weak glue can be applied. That is, wallpaper construction is possible with the same adhesive and construction method as conventional vinyl cloth.
According to the manufacturing method of the fourth invention, by grinding and polishing the surface of the veneer, the thickness of 0.05 to 0.1 mm can be reduced to a very thin thickness that is impossible by slicing with a blade without damaging the veneer. The thickness tolerance can be reduced. In addition, since the dye-containing resin that adheres the veneer and the backing sheet penetrates into the channel of the veneer, a color can be imparted to the natural wood thin paper, and the color exhibits a clear appearance.

It is the perspective view and partial sectional view of the natural wood thin paper A according to one embodiment of the present invention. It is three types of external views of the natural wood thin paper based on embodiment of this invention. It is explanatory drawing of the early wood and late wood of wood. It is explanatory drawing of the road pipe of wood. It is explanatory drawing of the whole process in the manufacturing method of this invention. It is explanatory drawing of the bonding and coloring process in the manufacturing method of this invention.

Next, an embodiment of the present invention will be described with reference to the drawings.
(Production method of the present invention)
FIG. 5 is a process diagram of a method for producing natural wood thin paper according to the present invention. As shown in the figure, the manufacturing method of the natural wood thin paper according to the present invention includes a laminating / coloring step I for bonding a backing sheet to the back surface of the veneer 1A, and grinding and polishing the veneer 1A. It consists of a grinding / polishing process II for making a 0.05 to 0.1 mm ultrathin veneer and a coating process III for coating the surface of the ultrathin veneer 1A.
The adhering / coloring step I and the grinding / polishing step II are preferably performed in this order, but the veneer 1A is first ground / polished, and then the bonding / coloring step of adhering the backing sheet 8 is performed. Also good.

Hereinafter, a description will be given with reference to FIGS. 5 and 6.
In addition, although the code | symbol 1A shown in FIG. 5 and FIG. 6 is a veneer, it is provided to a manufacturing process with the form of roll 1R3 wound up in roll shape, or the form of 1 long veneer 1A. Conventional processes are used without limitation for the process up to obtaining the veneer 1A, and the subsequent processes are executed according to the present invention.

I: Bonding / Coloring Process In the bonding / coloring process I shown in FIG. 1, the backing sheet 8 is bonded to the veneer 1A. For the execution of this process I, a laminating machine 10 shown in FIG. 6 is used. . The laminating machine 10 includes an adhesive application unit 11, a primary dryer 12, a press 13, a heating roll 14, and a secondary dryer 15.
As shown in FIG. 6, the backing sheet 8 is passed through the adhesive application unit 11 and the primary dryer 12 in that order. Next, the veneer 1 </ b> A and the backing sheet 8 are combined, pressed by a press 13, heated by a heating roll 14, and dried by a secondary dryer 15. The thin paper thus obtained is wound up into a roll.

Next, details of the adhesive application unit 11 will be described.
The backing sheet 8 is supplied to the adhesive application unit 11 while being wound in a roll shape. The adhesive application part 11 is composed of two rollers. The dye-containing resin 3A is placed in a valley between two rollers, and is applied to the surface of the backing sheet 8 that passes between the two rollers. In addition, the adhesive application part 11 is not restricted to what is comprised with two rollers so that it may show in figure, but may be what kind of application | coating part.

A tank 16 is connected to the adhesive application unit 11, and the tank 16 stores a dye-containing resin 3 </ b> A obtained by mixing the dye material 21 with the adhesive 3.
As the adhesive 3, both an inorganic adhesive and an organic adhesive can be used, but an organic adhesive is preferable.
As the organic adhesive, either a natural adhesive or a synthetic adhesive can be used.

The pigment material 21 is made of a pigment, a dye, or a mixture thereof. That is, the pigment raw material 21 may be either a pigment insoluble in water or oil, a so-called dye soluble in water or oil, or a mixture of pigment and dye.
The pigment includes inorganic pigments and organic pigments, and both can be used. Inorganic pigments include natural mineral pigments and synthetic inorganic pigments, such as white, red, blue, yellow, and black.
The organic pigment is a pigment containing an organic compound as a component, and includes yellow, orange, red, purple, blue, green, and the like.

The mixing ratio of the adhesive 3 and the pigment raw material 21 is arbitrary and is not particularly limited. The ratio of the adhesive 3 in the entire dye-containing resin 3A may be any as long as the veneer 1A and the backing sheet 8 are sufficiently bonded. The ratio of the pigment raw material to the entire pigment-containing resin 3A may be an amount sufficient to fill the channel of the veneer 1A, and the amount may be determined experimentally. Of course, if the pigment raw material is sufficiently penetrated and filled in the canal, the color of the entire veneer becomes dark, and if the amount of the pigment is small, the color of the entire veneer becomes light.

The components after the adhesive application unit 11 in the laminating machine 10 will be described.
12 is a primary dryer, and the dye-containing resin 3A is appropriately dried while the backing sheet 8 coated with the dye-containing resin 3A passes through.

Reference numeral 13 denotes a press. The backing sheet 8 coated with the dye-containing resin 3A and the aforementioned veneer 1A are inserted together on the entry side of the press 13 and joined together.
Reference numeral 14 denotes a heating roll with a built-in heater, which increases the bonding strength by heating the dye-containing resin 3A between the veneer 1A and the backing sheet 8 that has passed through the press 13 with the heating roll 14. Become.
Reference numeral 15 denotes a secondary dryer, which ensures the bonding between the veneer 1A and the backing sheet 8 while accelerating moisture by evaporating moisture from the dye-containing resin 3A with warm air.
What was wound out from the secondary dryer 15 is shown as a semi-finished product roll 1R2.

When passing through the adhesive application part 11, the dye-containing resin 3 </ b> A is applied to one side of the backing sheet 8. Then, the backing sheet 8 with the dye-containing resin 3A attached to one side is passed through the primary dryer 12, and then joined to the veneer 1A that is sent separately. At this time, the backing sheet 8 and the veneer 1A are joined together. Glued. The backing sheet 8 and the veneer 1A thus bonded are pressure-bonded by a press 13, heated by a heating roll 14, and dried by a secondary dryer.

While the bonding / coloring step I is performed, the dye-containing resin 3A penetrates into the channel of the ultrathin veneer 1A. This filling by infiltration is mainly due to capillarity, but is also assisted by pressurization with a roll.
In this way, the ultrathin veneer 1A in which the pigment containing resin 3A is filled in the passage is obtained.

II: Grinding / Polishing Step In the polishing step II shown in FIG. 5, the grinding / polishing machine described in Patent Document 1 is used.
In this grinding / polishing machine, sandpaper is wound around two upper and lower rollers. When one of the rollers is rotated as a drive wheel, the sandpaper circulates between the rollers. It also has a support roller that supports the veneer 1A from below.

When the veneer 1A is ground and polished with sandpaper while the semi-finished product roll 1R2 is fed, the thickness of the veneer 1A can be reduced without difficulty. Hereinafter, the thinned veneer will be described as an ultrathin veneer 1 denoted by reference numeral 1.

This grinding / polishing process includes both grinding to reduce the thickness with coarse sandpaper and polishing to polish the surface with fine sandpaper, but both of these may be performed separately. , And may be performed as a single step. Grinding may also be performed in multiple steps by changing the roughness of the sandpaper in order, or may be performed in one step. Thus, when grinding and polishing are performed, the surface roughness can be finely finished while efficiently reducing the thickness.

The thickness of the veneer 1A is about 0.5 to 0.15 mm as in the case of a general veneer, but according to the present step II, the ultrathin veneer 1 having a thickness of about 0.05 to 0.1 mm can be finished. This thinness is an extremely thin thickness that cannot be obtained by slicing with a blade. Moreover, the thickness tolerance achieved by grinding and polishing can be considerably reduced. When the veneer is sliced, the thickness tolerance is inevitably varied, but when grinding or polishing is used, the thickness tolerance can be minimized.
What was obtained by this process II is once wound up as a semi-finished product roll.

III: Painting process In the painting process shown in FIG. 5, a known coating machine is used.
The paint is applied to the surface of the ultrathin veneer 1 by the coating machine to form a coating film 9. Various paints can be used for the coating film 9 without limitation. For example, natural paints and water-repellent paints can be used.
As a result, it is possible to obtain a thin paper having various textures and having water repellency while having a wood bark. The ultrathin veneer 1 on which the coating film 9 is formed is wound up as a natural wood sheet A.

(Thin paper of the present invention)
Before describing the natural wood thin paper A of the present invention, first, the structure related to a wood pipe will be described.
FIG. 3 shows a piece of wood cut into square wood, and the upper side, the left side, and the front cuff surface are visible.
A thick thick line representing a so-called annual ring indicates a late material (summer material), and a light-colored portion between adjacent thick thick lines is an early material (spring material). One year is shown between the evening materials.

As shown in Fig. 4, the temporary material pipe of early wood (sazai) formed from spring to summer, when the formation layer is active, smoothly transfers the moisture necessary for tree growth from the root to the leaves. There are plenty of gaps to move to. On the other hand, Banzai temporary road pipes formed from summer to autumn support the weight of the trees themselves by thickening the walls and reducing the gaps. In other words, the annual ring is made up of a combination of the early wood part with the temporary road pipes with many gaps and the late part with the temporary road pipes with few gaps.

In the literature of Hokkaido University “March 1990, Faculty of Agriculture, Hokkaido University, Professor Kazuzo Fukai,“ Information of Tree Rings ”(Analysis Technology and Application to Forestry) P28-P29” the density of wood, the average of the early wood is 0.23 g / cm ^3, the average of the late wood is reported to 0.66 g / cm ^3.

The natural wood thin paper of the present invention is an application of the fact that wood has a pipe as described above.
The ultrathin veneer of natural wood, which is a constituent element of the present invention, has a wood character even if it is thin. And it is possible to infiltrate the pigment | dye raw material 21 by a capillary phenomenon in a channel, and can give a color to an ultra-thin veneer by doing so.

In addition, the grain formed by multiple annual rings of early and late wood can be reflected as it is colored.
For example, in the case of cedar, the following shades of pigment occur.
1. Since the average density of the early wood is as low as 0.23 g / cm ³ , the amount of the dye-containing resin 3A, and hence the dye raw material 21, permeates more and the color of the pigment becomes darker than the late wood.
2. Since the average density of the late material is as high as 0.66 g / cm ³ , the amount of the dye-containing resin 3A, and hence the dye raw material 21, permeates, and the color of the pigment becomes lighter than the early material.

The natural wood thin paper A of the present invention (Claim 1) is obtained by adhering a backing sheet to the back surface of a natural wood ultrathin veneer, and infiltrating a dye-containing resin into the channel of the ultrathin veneer. is there. The dye-containing resin may be contained by any method, but can be efficiently produced by using the production method of the present invention (claim 4).

As shown in FIG. 1, the natural wood thin paper A obtained by the production method of the present invention has a dye-containing resin 3 </ b> A infiltrated into countless passages in the veneer 1. And since the pigment-containing resin 3A in an amount corresponding to the density soaks into the early material passage and the late material passage, the color of the veneer 1 can be seen in the state of being utilized as it is. Become. In addition, since there are irregular gaps in the paper constituting the backing sheet 8, the dye-containing resin 3A penetrates into the inside.
For this reason, the natural wood thin paper A of the present invention has an appearance as if natural wood itself was dyed as shown in FIG.

FIG. 2 is a plan view of three-color natural wood thin paper (A), (B), (C) according to an embodiment of the present invention.
(A) The figure uses the wood-based pigment-containing resin 3A, and naturally shows the same color tone as that of the original natural wood.
(B) The figure uses the black pigment-containing resin 3A, and (C) the diagram uses the red pigment-containing resin 3A. In black and white photographs, the color is not understood, but the black (B) diagram has a darker color tone as a whole than the red (C) diagram, and in particular, the difference in shading of the early wood portion is shown.

The preferable range of the thickness of the natural wood thin paper A shown in FIG. 1 is as follows.
Total thickness of natural wood thin paper A: 0.08-0.2mm
Ultrathin veneer 1: 0.05 to 0.1mm
Backing sheet 8: 0.03-0.1mm

In particular, in order to make the color clear in appearance, it is important that the thickness of the veneer 1 is 0.05 to 0.1 mm. By making it extremely thin in this way, various colors can be expressed and a natural appearance can be obtained even with the same kind of natural wood, while taking advantage of the unique principles of natural wood.

The natural wood thin paper A as described above can use a single thin paper as wallpaper. However, the back surfaces of two thin papers may be bonded to each other, and both sides may be natural wood thin paper with grain. Such two sheets of natural wood thin paper have various uses such as stationery, miscellaneous goods, and building material products.
In addition, by punching two sheets of natural wood thin paper, it can be used for stationery such as bookmarks and bookmarks, miscellaneous goods and various other uses.

The natural wood thin paper A of the present invention has the following advantages.
a) Because natural wood is used as it is, breathe with the wood in the house. For this reason, since the indoor humidity can be adjusted through thin paper, the living environment is improved.
b) Since the thickness is very thin, it can be adhered to a curved surface portion. For this reason, there exists an advantage that an application range is wide.
c) Arbitrary colors are given, and the wood grain pattern is utilized as it is, so that it is possible to obtain a colored cosmetic material while leaving the texture of natural wood.

Below, the construction method of the natural wood thin paper of this invention is demonstrated.
There are two types of construction methods, the first is an on-site construction method, and the second is a construction method for industrial materials.
(On-site construction method)
One advantage of the present invention is that a construction method similar to the method of pasting a vinyl cloth on a building wall can be used.
As the adhesive, starch-based glue can be used, and the surface treatment is performed on site, the adhesive is applied to the wall surface with a brush or a roller, and the natural wood thin paper of the present invention is applied before drying.

(Industrial materials construction method)
It can be attached to the back surface of the natural wood thin paper of the present invention, that is, the back surface of the backing sheet 8 and the surface of a base material such as plywood.
For pasting, a vinyl acetate-based adhesive or the like is applied to the surface of the base material, temporarily bonded, and then pressed by a flat plate-like hot press or the like.
The crimped product can be handled like a printed plywood.

The natural wood thin paper of the present invention can be applied as a surface material such as furniture, pillars, ceilings, joinery, and various kinds of construction materials, besides being usable as wallpaper for houses and facilities. In this case, since the color to be given can be freely selected, in other words, natural wood thin paper of an arbitrary color can be selected, so that it is possible to easily coordinate the color and texture with existing pillars and fittings. It can also be used as a material for stationery and miscellaneous goods, and can be used as a substitute for paper by utilizing its extremely thin character. In this case, the paper product is usually a paper product, but the product can enjoy a woody sensation.

DESCRIPTION OF SYMBOLS 1 Veneer 3A Dye containing resin 8 Backing sheet 11 Adhesive application part 16 Tank 21 Dye raw material

Claims

A backing sheet is bonded to the back of a natural wood ultrathin veneer,
A natural wood thin paper, characterized in that a dye-containing resin is infiltrated into the duct of the ultrathin veneer.
2. The natural wood according to claim 1, wherein the dye-containing resin is obtained by mixing a pigment raw material that is a pigment, a dye, or a mixture thereof with an adhesive that bonds the ultrathin veneer and the backing sheet. Thin paper.
2. The natural wood thin paper according to claim 1, wherein the ultrathin veneer has a thickness of 0.05 to 0.1 mm.
A pasting and coloring process in which a backing sheet made mainly of paper or nonwoven fabric is bonded to the back of a veneer sliced from natural wood with a dye-containing resin composed of an adhesive containing a dye raw material,
A method for producing natural wood thin paper, comprising: a grinding / polishing step of forming an ultrathin veneer having a thickness of 0.05 to 0.1 mm by polishing the backing sheet of the veneer with a grinding / polishing machine.